High-rigidity polymer strong buckle type large ring vacuum bottle and preparation method thereof

Abstract

The present invention relates to a high-rigidity polymer strong buckle-type large-ring vacuum bottle and a preparation method thereof. The design addresses the technical problems of existing similar products, such as the difficulty in integrally assembling the large ring, inner bottle, and outer bottle of the inner and outer bottle vacuum bottles, the seldom use of inner and outer cap structural designs in bottle caps, and the poor material preparation and production. The key points are that the vacuum bottle has an inner rib groove on one side of the inner diameter of the bottle mouth of the outer bottle, an inner bottle buckle is provided on the inner diameter of the inner bottle mouth below the inner rib groove, a raised outer rib block is provided on one side of the bottle mouth of the inner bottle, a lower buckle is provided on the outer diameter of the bottle mouth of the inner bottle at the outer rib block, the outer rib block at the bottle mouth of the inner bottle is inserted into the inner rib groove at the inner bottle mouth extending out of the outer bottle, and the lower buckle of the inner bottle is buckled and fixed with the inner bottle buckle of the outer bottle; the outer ring groove on the outer diameter of the inner plug of the vacuum pump core is buckled and fixed to the upper pump groove of the large ring, the upper buckle of the inner bottle is buckled with the inner bottle groove of the large ring, and the upper gear ring of the inner bottle is meshed with the middle gear ring of the large ring. The bottle cap includes an outer cap and an inner cap, and the outer and inner bottles are made of high-rigidity polymer.

Description

Technical Field

[0001] The invention relates to a vacuum bottle, in particular to a high-rigidity polymer strong buckle type large-ring vacuum bottle and a preparation method thereof. Background Art

[0002] A vacuum flask is a container that isolates gases from the outside world, or from bacteria. Commercially available vacuum flasks consist of a cylindrical or ellipsoidal container with a piston at the bottom. They work by using the contraction of a spring to prevent air from entering the flask, creating a vacuum. Atmospheric pressure then pushes the piston forward. Some existing vacuum bottles adopt a double-layer bottle structure, such as the application number 201821221445.2 disclosed in the Chinese patent document, the authorization announcement date is 2019.06.21, and the utility model name is "Press-type vacuum pump"; another example is the application number 201921813366.5 disclosed in the Chinese patent document, the authorization announcement date is 2020.08.25, and the utility model name is "Antibacterial high-rigidity octagonal double-layer vacuum bottle"; and the application number 202022693268.1 disclosed in the Chinese patent document, the authorization announcement date is 2021.09.28, and the utility model name is "Lightweight high-rigidity multi-section cylindrical vacuum bottle"; however, the assembly structure between the inner bottle, outer bottle, and large ring of the above-mentioned products and similar products is difficult to fix into one, and it is difficult to realize automated production and assembly. Relative rotation is prone to occur, and the bottle cap lacks inner and outer cover structure design. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a high-rigidity, polymer-based, strong-buckle, large-ring vacuum flask and its manufacturing method. This approach addresses the technical issues of existing similar vacuum flasks, such as the difficulty in integrating the large ring, inner bottle, and outer bottle, the limited availability of inner and outer cap designs for bottle caps, and the difficulty in manufacturing components using high-rigidity polymer materials. This objective is achieved through the following technical solution.

[0004] A high-rigidity polymer strong buckle large-circle vacuum bottle, the bottle body of the vacuum bottle includes an inner bottle and an outer bottle, the bottom of the inner bottle is provided with a bottom cover, a large piston is provided in the inner bottle, the bottle mouth of the inner bottle extends out of the inner bottle mouth of the outer bottle, and is fixed to the inner center hole of the lower circle of the large circle, and at the same time, the outer diameter of the inner plug of the vacuum pump core is fixed between the inner center hole of the lower circle of the large circle and the bottle mouth of the inner bottle, the valve stem of the vacuum pump core extends out of the center hole of the large circle and is buckled with the liquid inlet hole at the bottom of the head cap, a step ring is provided on the outside of the bottle mouth of the outer bottle at the outer diameter of the large circle and the head cap, and a bottle cap buckle is provided with a buckled and fixed bottle cap at the step ring of the outer bottle. The key points of its structural design are that an inner rib groove is provided on the inner diameter side of the outer bottle's bottle opening, an inner bottle buckle is provided on the inner diameter of the outer bottle opening below the inner rib groove, a raised outer rib block is provided on the outer diameter side of the inner bottle's bottle opening, and a lower ring buckle is provided on the outer diameter of the inner bottle's bottle opening at the outer rib block. The outer rib block at the inner bottle's bottle opening is inserted into the inner rib groove extending from the inner bottle's inner bottle opening, and the lower ring buckle of the inner bottle is locked and fixed with the inner bottle buckle of the outer bottle. Thus, the inner bottle and the outer bottle positioning sleeve are combined and locked together as a whole, and the inner bottle will not rotate inside the outer bottle.

[0005] An upper buckle is provided on the outer diameter above the lower buckle at the bottle mouth of the inner bottle, an upper pump groove is provided on the inner diameter of the hole above the inner center hole of the large ring, and an inner bottle groove is provided on the inner diameter of the hole below the inner center hole of the large ring. The outer diameter of the inner plug of the vacuum pump core is clamped and fixed between the inner center hole of the lower ring of the large ring and the bottle mouth of the inner bottle. At the same time, the outer ring groove of the inner plug of the vacuum pump core is snap-fastened to the upper pump groove of the large ring, and the upper buckle of the inner bottle is snap-fitted to the inner bottle groove of the large ring. Thus, the inner bottle is fixed to the outer bottle while being snap-fitted to the large ring.

[0006] The inner diameter of the central hole above and below the inner diameter of the large ring is provided with a middle toothed ring. The outer diameter of the inner plug of the inner bottle is clamped and fixed between the inner center hole of the lower ring opening of the large ring and the bottle opening of the inner bottle. At the same time, the upper toothed ring of the inner bottle meshes with the middle toothed ring of the large ring. Thus, the inner bottle is fastened to the large ring, and the inner bottle and the large ring are further meshed and fixed by the upper and middle toothed rings.

[0007] The bottle cap comprises an outer cap and an inner cap. A raised middle ring, smaller than the diameter of the cap opening, is provided above the outer diameter of the inner cap. An annular groove is provided between the inner diameter of the middle ring and the outer diameter of the inner cap. A raised guide rib, smaller than the outer diameter, is provided on at least one side of the step of the middle ring. Guide buckles are symmetrically provided on both sides of the guide rib. The guide rib and guide buckle of the inner cap correspond to the guide groove and guide slot on the inner wall above the cap opening of the outer cap. The guide rib of the inner cap is inserted into the guide groove of the outer cap, and the guide buckle of the inner cap engages with the guide groove of the outer cap, thereby integrally connecting the inner cap and the outer cap. An outer bottle groove is provided on the inner diameter of the cap opening of the inner cap. The outer bottle groove of the inner cap is buckled and fixed to the bottle cap of the outer bottle. The above is an embodiment of a bottle cap formed by buckling the outer cap and the inner cap. Therefore, when the vacuum bottle falls, the bottle cap is not easily broken and an impact-absorbing force is generated.

[0008] The top of the bottom cover is provided with an upwardly protruding middle ring. Outside the middle ring, the top of the bottom cover is provided with a sealing ring that is upwardly protruding and lower than the middle ring. Outside the sealing ring, the edge of the bottom cover opening is provided with raised, equally spaced arc-shaped electric fusion ribs. The sealing ring of the bottom cover is fitted and fixed to the inner diameter of the bottle opening at the bottom of the inner bottle. Meanwhile, the electric fusion ribs are fixed to the bottle opening ring surface at the bottom of the inner bottle through ultrasonic welding. This structure further secures the bottom cover to the inner bottle.

[0009] The spring of the vacuum pump core is arranged in the upper spring groove protruding downward on the outer diameter of the top of the valve stem and the lower spring groove protruding upward on the outer diameter of the inner plug at the joint. The lower spring groove of the inner plug is sleeved on the outer side of the upper spring groove of the valve stem. The valve needle in the pump body of the vacuum pump core is engaged with the center hole of the valve stem. The piston in the pump body is arranged on the outer diameter of the valve needle at the joint of the valve stem and the valve needle. An elastic sleeve is provided in the elastic sleeve groove at the center hole of the bottom of the pump body. The plug port of the inner plug is sleeved and engaged with the pump port of the pump body. The above is a specific structural embodiment of the vacuum pump core.

[0010] The vacuum pump core omits the upper spring slot of the valve stem and the lower spring slot of the inner plug. The spring is replaced with a bellows plastic spring, one end of which abuts the inner plug and the other end abuts the outer diameter ring rib of the valve stem. This makes the vacuum bottle, with its all-plastic structure, easy to recycle and reuse.

[0011] The outer diameter side of the outer cover is provided with a raised outer cover rib, the outer cover rib of the outer cover extends downward to the cover opening of the outer cover and is reduced on both sides, the cover opening diameter of the outer cover is reduced and an outer cover opening chamfer is provided; the outer diameter side of the outer bottle is provided with a raised outer bottle rib, the outer bottle rib of the outer bottle extends downward to the outer bottle opening of the outer bottle and is reduced on both sides, the outer bottle opening diameter of the outer bottle is reduced and an outer bottle opening chamfer is provided, the chamfer of the outer bottle opening of the outer bottle is aligned with the chamfer of the outer cover opening of the outer cover, and the outer cover rib of the outer cover forms a cross shape when aligned with the outer bottle rib of the outer bottle.

[0012] When the outer ribs of the outer cap are aligned with those of the outer bottle, the outer threads of the larger circle and the inner threads of the inner cap are rotated and locked to a stopper located at one side of the bottom of the larger circle's outer threads. This facilitates alignment of the outer ribs of the outer cap with those of the outer bottle when the cap and bottle body are rotated into position, enhancing the appearance of the vacuum bottle and providing an intuitive sense of whether it is locked in place.

[0013] The outer bottle is a high-rigidity polymer outer bottle, and the inner bottle is a high-rigidity polymer outer bottle. The high-rigidity polymer material is made of the following components in weight percentage: 72%-84% high-density polyethylene, 10%-20% aluminum hydroxide, 5%-10% calcium oxide, 8%-10% glycerol, 5%-3% modified graphene oxide colloid, 0.5%-2.5% antioxidant 264 and 0.1%-1% antioxidant CA; comprising the following steps: a) mixing sodium citrate and silver nitrate aqueous solution with a concentration of 0.01-0.5M in a three-necked flask, adding a certain amount of graphene oxide aqueous solution, and then adding a certain amount of polydiallyldimethylammonium chloride solution with a volume fraction of 40%, wherein the volume fraction of the polydiallyldimethylammonium chloride solution with a volume fraction of 40% is 4-5 ml for every 100 mg of graphene oxide colloid, magnetically stirring at room temperature for 12 hours, and then magnetically stirring in an oil bath at 130°C for 3 hours. b) uniformly mixing the above-mentioned high-density polyethylene, aluminum hydroxide, calcium oxide, glycerol, modified graphene oxide colloid, antioxidant 264 and antioxidant CA, and adding compatibilizer PE-bM, carbon nanotubes and silicon dioxide at the same time, heating and mixing in an internal mixer for 20-30 minutes, granulating to obtain modified particles, using a double-layer co-extrusion blow molding device to use the modified particles as the material for making the outer bottle and the inner bottle, mixing into a tubular melt in the extrusion die of the device, and stretching and blow molding the tubular melt through a blow molding die to obtain a finished product.

[0014] The invention has a reasonable structural design, is easy to use and operate, has good sealing and stability, and has a beautiful appearance. In particular, the large ring, the inner bottle, and the outer bottle are easy to assemble, the structure is firm, the preparation material has good performance, and the production method is feasible. The invention is suitable for use as a double-layer vacuum bottle and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the explosion structure of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure in the explosion state.

[0017] Figure 3 It is a schematic cross-sectional view of the present invention, in which the framed portion is enlarged.

[0018] Figure 4 It is a structural schematic diagram of the bottle cap of the present invention in an open state.

[0019] Figure 5 It is a schematic diagram of the internal structure of the large circle of the present invention.

[0020] Figure 6 This is a schematic diagram of the external structure of the present invention, in which the framed portion is an improved structure of a large circle.

[0021] Serial number and name of the attached drawings: 1. Outer cover, 101. Guide groove, 102. Guide strip groove, 2. Inner cover, 201. Guide buckle, 202. Guide strip rib, 203. Outer bottle groove, 3. Head cap, 4. Vacuum pump core, 5. Big ring, 501. Upper pump groove, 502. Inner bottle groove, 503. Middle gear ring, 6. Silicone gasket, 7. Outer bottle, 701. Bottle cap buckle, 702. Inner bottle buckle, 703. Inner rib groove, 8. Inner bottle, 801. Upper gear ring, 802. Upper ring buckle, 803. Outer rib block, 804. Lower ring buckle, 9. Big piston, 10. Bottom cover, 1001. Electric fusion rib. DETAILED DESCRIPTION

[0022] Now, the structure of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 5 As shown, the bottle body of the vacuum bottle includes an inner bottle 8 and an outer bottle 7, a bottom cover 10 is provided at the bottom of the inner bottle, a large piston 9 is provided in the inner bottle, the bottle mouth of the inner bottle extends out of the inner bottle mouth of the outer bottle, and is fixed to the inner center hole of the lower ring mouth of the large circle 5, and at the same time, the outer diameter of the inner plug of the vacuum pump core 4 is snapped and clamped between the inner center hole of the lower ring mouth of the large circle and the bottle mouth of the inner bottle, the valve stem of the vacuum pump core extends out of the center hole of the large circle and is snapped together with the liquid inlet hole at the bottom of the head cap 3, a step ring is provided on the outside of the bottle mouth of the outer bottle of the outer diameter of the large circle and the head cap, and a bottle cap buckle 701 is provided at the step ring of the outer bottle for snapping and fixing. Its specific structure is as follows: an inner rib groove 703 is provided on one side of the inner diameter of the bottle mouth of the outer bottle, an inner bottle buckle 702 is provided on the inner diameter of the inner bottle mouth below the inner rib groove, a raised outer rib block 803 is provided on one side of the outer diameter of the bottle mouth of the inner bottle, and a lower ring buckle 804 is provided on the outer diameter of the bottle mouth of the inner bottle at the outer rib block. The outer rib block at the bottle mouth of the inner bottle is inserted into the inner rib groove at the inner bottle mouth extending out of the outer bottle, and at the same time, the lower ring buckle of the inner bottle is buckled and fixed with the inner bottle buckle of the outer bottle. An upper ring buckle 802 is provided on the outer diameter above the lower ring buckle at the bottle mouth of the inner bottle, an upper pump groove 501 is provided on the inner diameter of the hole above the inner center hole of the large circle, an inner bottle groove 502 is provided on the inner diameter of the hole below the inner center hole of the large circle, a middle gear ring 503 is provided on the inner wall of the hole above and the inner diameter of the hole below the inner center hole of the large circle, and an upper gear ring 801 is provided on the outer diameter below the bottle mouth of the inner bottle; the outer diameter of the inner plug of the vacuum pump core is clamped and fixed between the inner center hole of the lower ring mouth of the large circle and the bottle mouth of the inner bottle. At the same time, the outer ring groove of the outer diameter of the inner plug of the vacuum pump core is buckled and fixed to the upper pump groove of the large circle, the upper ring buckle of the inner bottle is buckled with the inner bottle groove of the large circle, and the upper gear ring of the inner bottle is meshed with the middle gear ring of the large circle.

[0023] The above-mentioned bottle cap includes an outer cover 1 and an inner cover 2. A middle ring smaller than the diameter of the cover opening and raised is provided above the outer diameter of the inner cover. An annular groove is provided between the inner diameter of the middle ring and the outer diameter of the inner cover. Guide ribs 202 that are raised and smaller than the outer diameter are symmetrically provided on both sides of the step of the middle ring. Guide buckles 201 are symmetrically provided on both sides of the guide ribs. The guide ribs and guide buckles of the inner cover correspond to the guide grooves 102 and guide grooves 101 on the inner wall above the cover opening of the outer cover. When the guide ribs of the inner cover are inserted into the guide grooves of the outer cover, the guide buckles of the inner cover are buckled with the guide grooves of the outer cover, and the inner cover and the outer cover are connected as one. An outer bottle groove 203 is provided on the inner diameter of the cover opening of the inner cover, and the outer bottle groove of the inner cover is buckled and fixed with the bottle cap buckle 701 of the outer bottle. The top of the bottom cover is equipped with an upwardly protruding middle ring. Outside the middle ring, the top of the bottom cover is equipped with a sealing ring that protrudes upward and is lower than the middle ring. Outside the sealing ring, the edge of the top cover is equipped with raised, evenly spaced arc-shaped electric fusion ribs 1001. The sealing ring of the bottom cover is fitted and fixed to the inner diameter of the bottle mouth at the bottom of the inner bottle. The electric fusion ribs are fixed to the bottle mouth ring surface at the bottom of the inner bottle via ultrasonic welding. The spring of the vacuum pump core is installed within the downwardly protruding upper spring groove on the outer diameter of the valve stem and the upwardly protruding lower spring groove on the outer diameter of the inner plug where it engages. The lower spring groove of the inner plug fits outside the upper spring groove of the valve stem. The valve needle in the pump body of the vacuum pump core engages with the center hole of the valve stem. The piston in the pump body is installed at the outer diameter of the valve needle where the valve stem and valve needle engage. An elastic sleeve is installed in the elastic sleeve groove in the center hole of the bottom of the pump body. The plug opening of the inner plug fits into the pump opening of the pump body.

[0024] At the same time, if Figure 6 As shown, the outer cover has a raised outer rib on one side of its outer diameter. This rib extends downward to the outer opening of the outer cover and tapers on both sides. The reduced diameter of the outer opening of the outer cover is provided with an outer chamfer. The outer bottle also has a raised outer rib on one side of its outer diameter. This rib extends downward to the outer opening of the outer bottle and tapers on both sides. The reduced diameter of the outer opening of the outer bottle is provided with an outer chamfer. The outer chamfer of the outer opening of the outer bottle aligns with the outer chamfer of the outer opening of the outer cover. When the outer rib of the outer cover and the outer rib of the outer bottle align, the outer thread of the large ring and the inner thread of the inner cover rotate and lock together until they reach a stop. The stop is located on one side of the bottom of the outer thread of the large ring. Alternatively, the vacuum pump core can omit the upper spring groove of the valve stem and the lower spring groove of the inner plug. The spring can be replaced with a bellows plastic spring, one end of which abuts the inner plug and the other end abuts the outer diameter rib of the valve stem.

[0025] The specific steps for assembling this vacuum bottle are as follows: Assemble the A1 outer cover component, press the inner cover into the outer cover, and align the inner cover's guide buckles 201 and guide ribs 202 with the outer cover's guide grooves 101 and guide grooves 102. Press and secure them in place, and the A1 outer cover component is assembled. To assemble the A2 nozzle component, first insert the silicone gasket into the vacuum pump core, ensuring it fits snugly. Then, press the large ring into the vacuum pump core, ensuring it fits snugly into the buckle. Finally, press the head cap into the vacuum pump core, ensuring it fits snugly into the buckle. This completes the A2 nozzle component assembly. To assemble the A3 bottle body, first insert the large piston into the inner bottle. Apply silicone oil to the inner wall of the inner bottle to secure it to the large piston. Next, ultrasonically weld the bottom cap 1001 to the inner bottle 805 until secure. Then, press the outer bottle in, aligning its inner rib groove 703 with the inner bottle's outer rib block 803. The outer bottle's inner bottle buckle 702 mates with the inner bottle's lower ring buckle 804, securing it securely. This completes the A3 bottle body assembly. To assemble the A4 product, first press the A2 nozzle assembly into the A3 bottle body. The large ring's inner bottle groove 502 mates with the inner bottle's upper ring buckle 802, and the large ring's middle gear ring 503 mates with the inner bottle's upper gear ring, securing it securely. Next, press the A2 nozzle assembly in, aligning the inner cap's outer bottle groove 203 with the outer bottle's cap buckle 701, ensuring a tight fit. To use, open the bottle cap and press the cap.

Claims

1. A high-rigidity polymer strong buckle type large-ring vacuum bottle, the bottle body of the vacuum bottle includes an inner bottle (8) and an outer bottle (7), the bottom of the inner bottle is provided with a bottom cover (10), the inner bottle is provided with a large piston (9), the bottle mouth of the inner bottle extends out of the inner bottle mouth of the outer bottle, and is fixed to the inner center hole of the lower ring mouth of the large ring (5), while the outer diameter of the inner plug of the vacuum pump core (4) is buckled and clamped between the inner center hole of the lower ring mouth of the large ring and the bottle mouth of the inner bottle, the valve stem of the vacuum pump core extends out of the center hole of the large ring and is buckled with the liquid inlet hole at the bottom of the head cap (3), the outer side of the bottle mouth of the outer bottle of the large ring and the outer diameter of the head cap is provided with a step ring, and the bottle cap buckle (701) of the step ring of the outer bottle is provided with a buckled and fixed bottle cap; it is characterized in that An inner rib groove (703) is provided on one side of the inner diameter of the bottle mouth of the outer bottle (7), an inner bottle buckle (702) is provided on the inner diameter of the inner bottle mouth below the inner rib groove, a raised outer rib block (803) is provided on one side of the outer diameter of the bottle mouth of the inner bottle, a lower ring buckle (804) is provided on the outer diameter of the bottle mouth of the inner bottle at the outer rib block, the outer rib block at the bottle mouth of the inner bottle is inserted into the inner rib groove at the inner bottle mouth extending out of the outer bottle, and the lower ring buckle of the inner bottle is fastened and fixed with the inner bottle buckle of the outer bottle; an upper ring buckle (802) is provided on the outer diameter above the lower ring buckle (804) at the bottle mouth of the inner bottle (8), The inner diameter of the hole above the inner center hole of the large circle (5) is provided with an upper pump groove (501), the inner diameter of the hole below the inner center hole of the large circle is provided with an inner bottle groove (502), the outer diameter of the inner plug of the vacuum pump core (4) is clamped and fixed between the inner center hole of the lower ring of the large circle (5) and the bottle mouth of the inner bottle. At the same time, the outer diameter of the inner plug of the vacuum pump core is fixed to the upper pump groove of the large circle by a buckle, and the upper ring buckle of the inner bottle is buckled with the inner bottle groove of the large circle; the top of the bottom cover (10) is provided with an upwardly protruding middle circle, and the top of the bottom cover outside the middle circle is provided with a buckle The sealing ring is raised and lower than the middle ring, and the edge of the top cover of the bottom cover outside the sealing ring is provided with raised and equally spaced arc-shaped electric melting ribs (1001), and the sealing ring of the bottom cover is fitted and fixed to the inner diameter of the bottle mouth at the bottom of the inner bottle (8). At the same time, the electric melting ribs are fixed to the bottle mouth ring surface at the bottom of the inner bottle by ultrasonic welding; the bottle cap includes an outer cover (1) and an inner cover (2), and one side of the outer diameter of the outer cover (1) is provided with a raised outer cover rib, and the outer cover rib of the outer cover extends downward to the cover mouth of the outer cover and is reduced on both sides, and the cover mouth diameter of the outer cover is reduced and provided with an outer cover. The outer bottle (7) is provided with a raised outer bottle rib on one side of the outer diameter, the outer bottle rib of the outer bottle extends downward to the outer bottle mouth of the outer bottle and is reduced on both sides, the outer bottle mouth of the outer bottle is reduced in diameter and provided with an outer bottle mouth chamfer, the outer bottle mouth chamfer of the outer bottle is aligned with the outer cover mouth chamfer of the outer cover, and the outer cover rib of the outer cover is in a cross shape when aligned with the outer bottle rib of the outer bottle; when the outer cover rib of the outer cover (1) is aligned with the outer bottle rib of the outer bottle (7), the outer thread of the large circle (5) and the inner thread of the inner cover (2) are rotated and locked to the stopper, and the stopper is provided on one side of the bottom of the outer thread of the large circle.

2. The high-rigidity polymer strong buckle large ring vacuum bottle according to claim 1 is characterized in that A middle tooth ring (503) is provided on the inner wall of the upper opening and the lower opening of the inner center hole of the large circle (5), and an upper tooth ring (801) is provided on the outer diameter below the bottle mouth of the inner bottle (8). The outer diameter of the inner plug of the vacuum pump core (4) is clamped and fixed between the inner center hole of the lower ring opening of the large circle and the bottle mouth of the inner bottle. At the same time, the upper tooth ring of the inner bottle is engaged with the middle tooth ring of the large circle.

3. The high-rigidity polymer strong buckle large ring vacuum bottle according to claim 1 is characterized in that A raised middle ring smaller than the diameter of the cover opening is provided above the outer diameter of the cover opening of the inner cover (2), an annular groove is provided between the inner diameter of the middle ring and the outer diameter of the inner cover, a raised guide rib (202) smaller than the outer diameter is provided on at least one side of the step of the middle ring, and guide buckles (201) are symmetrically provided on both sides of the guide rib, the guide rib and the guide buckle of the inner cover correspond to the guide groove (102) and the guide groove (101) on the inner wall above the cover opening of the outer cover (1), the guide rib of the inner cover is inserted into the guide groove of the outer cover, and the guide buckle of the inner cover is buckled with the guide groove of the outer cover, so that the inner cover and the outer cover are connected as a whole; an outer bottle groove (203) is provided on the inner diameter of the cover opening of the inner cover, and the outer bottle groove of the inner cover is buckled and fixed with the bottle cap buckle (701) of the outer bottle (7).

4. The high-rigidity polymer strong buckle large ring vacuum bottle according to claim 1 is characterized in that The spring of the vacuum pump core (4) is arranged in an upper spring groove protruding downward on the outer diameter of the top of the valve stem and a lower spring groove protruding upward on the outer diameter of the inner plug at the joint, the lower spring groove of the inner plug is sleeved on the outer side of the upper spring groove of the valve stem, the valve needle in the pump body of the vacuum pump core is buckled with the center hole of the valve stem, the piston in the pump body is arranged at the outer diameter of the valve needle at the joint of the valve stem and the valve needle, an elastic sleeve is provided in the elastic sleeve groove at the center hole of the bottom of the pump body, and the plug mouth of the inner plug is sleeved and buckled into the pump mouth of the pump body.

5. The high-rigidity polymer strong buckle large ring vacuum bottle according to claim 4 is characterized in that The vacuum pump core (4) omits the upper spring groove of the valve stem and the lower spring groove of the inner plug, and the spring is replaced by a bellows plastic spring, one end of the bellows plastic spring abuts against the inner plug, and the other end abuts against the outer diameter ring rib of the stem opening of the valve stem.

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