A tea packaging can with improved air tightness

Abstract

The present invention relates to the technical field of packaging cans, and specifically to a tea packaging can with improved air tightness, comprising a can body with a cavity, liquid nitrogen filled and arranged on the can body and located in the cavity, a closing cover arranged on the upper end surface of the can body, a lifting baffle plate which can be lifted and arranged on the can body and located in the cavity, a limiting ring platform which can be arranged on the can body and located in the cavity, a sealing block which can be arranged on the can body and located in the cavity, a deformation sealing plate which can be lifted and arranged in the cavity and located below the lifting baffle plate, a matching inclined plate which can be lifted and arranged on the peripheral side of the lifting plate, a matching inclined surface which can be opened on the lower end surface of the deformation sealing plate, a fixing device which can be arranged between the upper end surface of the lifting plate and the lifting baffle plate, a lower sealing plate which can be arranged on the peripheral side of the lower end of the matching inclined plate, and a deformation mechanism which can be arranged between the lower sealing plate and the peripheral side of the lower end of the matching inclined plate.

Description

Technical Field

[0001] The invention relates to the technical field of packaging cans, and in particular to a tea packaging can with improved air tightness. Background Art

[0002] Tea, commonly known as tea, generally includes the leaves and buds of the tea tree. It is also known as tea, tea, tea, tea. Tea ingredients include catechins, cholesterin, caffeine, inositol, folic acid, and pantothenic acid, which are beneficial to health. Tea beverages made from tea are one of the three major beverages in the world.

[0003] A tea can is a container used to store tea leaves, usually made of metal (such as tin, aluminum, stainless steel, etc.), but some are made of glass, ceramic or plastic. The main function of a tea can is to protect the quality and taste of tea leaves, and prevent them from getting damp, absorbing odors or being affected by other factors.

[0004] At present, when packaging tea leaves, tea packaging cans are filled with liquid nitrogen to allow the liquid nitrogen to volatilize and generate nitrogen gas, which keeps the tea leaves fresh in the can. However, traditional packaging cans are only sealed with easy-open lids. When the easy-open lids are deformed by external impact or bumps, a gap is likely to appear between the easy-open lids and the can body, thereby reducing the airtight effect of the nitrogen in the can body. Summary of the invention

[0005] The object of the present invention is to provide a tea packaging can with improved air tightness in view of the defects and shortcomings of the prior art.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a tea packaging can with improved air tightness, comprising a can body with a cavity, liquid nitrogen filled in the cavity and arranged on the can body, a sealing cover arranged on the upper end surface of the can body for sealing the cavity, a lifting baffle plate arranged on the can body and located in the cavity, a limiting ring platform arranged on the can body and located in the cavity for limiting the lower end of the lifting baffle plate, a sealing block arranged on the can body and located in the cavity, a deformation sealing plate arranged on the sealing block, a lifting baffle plate arranged in the cavity and A lifting plate disposed inside and below the lifting baffle, a matching inclined plate disposed on the peripheral side of the lifting plate, a matching inclined surface provided on the lower end surface of the deformation sealing plate and used to fit with the inclined surface of the matching inclined plate, a fixing device disposed between the upper end surface of the lifting plate and the lifting baffle and used to limit the lifting plate from descending when the matching inclined surface fits with the inclined surface of the matching inclined plate, a lower sealing plate disposed on the peripheral side of the lower end of the matching inclined plate, and a deformation mechanism disposed between the lower sealing plate and the peripheral side of the lower end of the matching inclined plate and used for the lower sealing plate to deform upward or downward on the peripheral side of the lower end of the matching inclined plate;

[0007] The fixing device includes a through hole passing through the center end of the lifting baffle, a fixing pull rope with one end fixedly arranged on the upper end of the lifting baffle and the other end passing through the through hole and located above the lifting baffle, a winding column arranged on the upper end surface of the lifting baffle for the other end of the fixing pull rope to be wound and fixed, and a plastic connecting end arranged at the other end of the fixing pull rope for plastic deformation of the other end of the fixing pull rope after the other end of the fixing pull rope is wound on the winding column.

[0008] A further improvement is that the peripheral side of the closure cover is riveted or threadedly connected to the tank body.

[0009] A further improvement is that the deformation sealing plate is a rubber plate or a silicone plate or a polyurethane plate.

[0010] A further improvement is that the deformation mechanism includes an elastic connecting block arranged between the lower sealing plate and the lower end circumference of the matching inclined plate, and the elastic connecting block is a rubber block or a silicone block or a polyurethane block, and the elastic connecting block is fixedly connected to the lower sealing plate and the lower end circumference of the matching inclined plate respectively.

[0011] A further improvement is that a deformation inner cavity is provided inside the elastic connection block, and the deformation inner cavity is located in the upper half of the elastic connection block.

[0012] A further improvement is that: the lower end surface of the sealing stopper is provided with a slope surface, and the slope surface is inclined from the outer side to the inner side of the tank body.

[0013] A further improvement is that: there are two winding columns, the two winding columns are symmetrically arranged on both sides of the through hole, the upper end faces of the two winding columns are provided with anti-slip disks, the diameter of the anti-slip disks is larger than the diameter of the winding columns, and the upper end face of the lifting baffle is located at the chamfered surface of the upper end of the through hole.

[0014] A further improvement is that: a limiting block is arranged on the lower end surface of the closing cover, the limiting blocks are the same in number as the anti-slip disks, the positions of the limiting blocks correspond to the anti-slip disks, and the limiting blocks are rubber blocks or silicone blocks.

[0015] A further improvement is that an auxiliary limiting plate is fixedly provided at the lower end of the lifting baffle, and the auxiliary limiting plate is used to limit the upward deformation of the deformation sealing plate on the baffle.

[0016] A further improvement is that the plastic connecting end is a wire core body arranged at the other end of the fixed pull rope, the wire core body is iron wire or stainless steel wire or copper wire or aluminum wire, and the outer side of the plastic wire body is coated with a rubber layer, and the rubber layer is TPU or PE or PVC or nylon.

[0017] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: when it is necessary to package the tea leaves, all accessories are prepared and the other end of the fixed pull rope is passed through the lifting baffle through the perforation, and then the tea leaves are placed in the cavity of the can body and liquid nitrogen is filled into the cavity, and then the lifting plate is quickly placed in the cavity and pressed downward, and the matching inclined plate squeezes the deformation sealing plate downward, so that the deformation sealing plate is elastically deformed downward so that the matching inclined plate is located under the deformation sealing plate, and when the lower sealing plate is squeezed with the deformation sealing plate, the deformation mechanism is used to deform upward at the lower end circumference of the matching inclined plate, and the lower sealing plate is located under the sealing block by utilizing the elastic deformation of the lower sealing plate and the deformation sealing plate. At this time, the fixed pull rope is slightly lifted upward by the hand and the lifting baffle is placed into the cavity from the upper opening of the can body until the lifting baffle can no longer descend on the limiting ring platform, and then the fixed pull rope is pulled upward to squeeze and fit the matching inclined plate and the matching inclined surface, and the other end of the fixed pull rope is wrapped around the winding column, and the other end of the fixed pull rope is wrapped around After winding is completed, the other end of the pull rope is fixed to the winding column through the plastic connecting end, thereby preventing the fixed pull rope on the winding column from loosening, so as to limit the descent of the lifting plate in the cavity, and then the closing cover is installed and fixed on the tank body to seal the cavity, and the liquid nitrogen is gasified in the cavity to increase the volume of the nitrogen in the cavity, and because the matching inclined plate and the lifting plate are in a cover shape, the lifting plate and the matching inclined plate are pushed upward by the nitrogen at this time, so that the upper surface of the matching inclined plate is more tightly attached to the matching inclined surface to play a sealing role, and the lower sealing plate is also pushed upward by the nitrogen. The deformation mechanism is used to deform upward on the lower end circumference of the matching inclined plate, so that the upper end surface of the lower sealing plate is attached to the lower end surface of the sealing block to achieve a sealing effect. The sealing is performed by the lower sealing plate, the matching inclined plate, and the closing cover respectively, which can improve the sealing effect of the nitrogen in the cavity. When the closing cover is deformed by external impact or bump, the nitrogen in the cavity is not easy to leak out, which can improve the airtight effect of the nitrogen in the tank body.

[0018] Further effect: the limiting ring is a T-shaped ring, the inner diameter of the upper part of the limiting ring matches the clearance of the lifting baffle, and the inner diameter of the lower part of the limiting ring is smaller than the inner diameter of the upper part, thereby limiting the position of the lifting baffle.

[0019] Further effect: by arranging the elastic connecting block between the lower sealing plate and the lower end circumference of the matching inclined plate, when the lower sealing plate is subjected to upward or downward pressure, the elastic connecting block can swing upward or downward around the lower end circumference of the matching inclined plate; and the deformation inner cavity arranged in the upper half of the elastic connecting block can increase the deformation space of the upper half of the elastic connecting block, so that when the volume of nitrogen in the cavity increases, the lower sealing plate is more likely to swing upward around the lower end circumference of the matching inclined plate and fit the lower end surface of the sealing block.

[0020] Further effect: when the lower sealing plate swings upward around the lower end circumference of the matching inclined plate, the lower sealing plate swings upward in an inclined state, and the slope surface can fit with the inclined state of the lower sealing plate, thereby improving the sealing effect by increasing the fitting area.

[0021] Further effect: pull the other end of the fixed pull rope to the position of one of the winding posts and wrap it around, and then pull it to the position of another winding post and wrap it around after wrapping one circle, until the other end of the fixed pull rope is completely wrapped around the winding post. The winding steps of the fixed pull rope on the winding post can be performed at will, as long as the fixed pull rope can be stably fixed.

[0022] Further effect: after the closing cover is installed on the upper end of the tank body, the lifting effect of the lifting baffle can be further limited by the limiting block abutting against the upper end surface of the anti-detachment disk, and after the closing cover is removed from the tank body, the lifting baffle can be taken out upward from the cavity.

[0023] Further effect: when the limiting plate further limits the rise of the lifting baffle, the auxiliary limiting plate is located above the deformation sealing plate or abuts against the upper end surface of the deformation sealing plate. When the mating inclined plate is pushed by nitrogen to generate an upward force, the upward deformation of the deformation sealing plate on the sealing block can be limited, thereby maintaining a close fit between the mating inclined plate and the mating inclined surface.

[0024] Further effect: the wire core body made of iron wire or stainless steel wire or copper wire or aluminum wire has the effect of plastic deformation, and the rubber coating layer can reduce the discomfort caused by direct contact between the hand and the wire core body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 is a front view cutaway view of the present invention;

[0027] Figure 2 It corresponds to Figure 1 Another state diagram of ;

[0028] Figure 3 It is a structural schematic diagram of the tank body in the present invention;

[0029] Figure 4 is a top view of the lifting baffle in the present invention;

[0030] Figure 5 It is a front view cutaway exploded view of the tank body of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the lifting baffle in the present invention;

[0032] Figure 7 It corresponds to Figure 2 A magnified view of part A;

[0033] Figure 8 It is a cross-sectional view of the plastic connection end in the present invention.

[0034] Explanation of the accompanying drawings: tank body 1, closing cover 2, limiting ring platform 3, lifting baffle 4, limiting block 5, sealing block 6, deformation sealing plate 7, lifting plate 8, matching inclined plate 9, matching inclined surface 10, lower sealing plate 11, perforation 12, fixed pull rope 13, winding column 14, plastic connecting end 15, elastic connecting block 16, deformation inner cavity 17, slope surface 18, anti-slip disk 19, auxiliary limiting plate 20, chamfered surface 21, cavity 22, wire core body 151, rubber coating 152, protective cover a1, lower concave surface a2, upper concave surface a3. DETAILED DESCRIPTION

[0035] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0036] See also Figures 1 to 8 As shown, the technical solution adopted in this specific embodiment is: a tea packaging can with improved air tightness, comprising a can body 1 with a cavity 22, liquid nitrogen (not shown in the figure) filled and arranged on the can body 1 and located in the cavity 22, a closing cover 2 arranged on the upper end surface of the can body 1 for closing the cavity 22, a lifting baffle 4 arranged on the can body 1 and located in the cavity 22 and capable of being lifted and lowered, a limiting ring platform 3 arranged on the can body 1 and located in the cavity 22 and used for limiting the lower end of the lifting baffle 4, a sealing block 6 arranged on the can body 1 and located in the cavity 22, a deformation sealing plate 7 arranged on the sealing block 6, and a lifting baffle 4 arranged on the upper end surface of the can body 1 and capable of being lifted and lowered. A lifting plate 8 in the cavity 22 and below the lifting baffle 4, a matching inclined plate 9 arranged on the peripheral side of the lifting plate 8, a matching inclined surface 10 provided on the lower end surface of the deformable sealing plate 7 and used to fit with the inclined surface of the matching inclined plate 9, a fixing device arranged between the upper end surface of the lifting plate 8 and the lifting baffle 4 and used to limit the lifting plate 8 from descending when the matching inclined surface 10 fits with the inclined surface of the matching inclined plate 9, a lower sealing plate 11 arranged on the peripheral side of the lower end of the matching inclined plate 9, and a deformation mechanism arranged between the lower sealing plate 11 and the peripheral side of the lower end of the matching inclined plate 9 for the lower sealing plate 11 to deform upward or downward on the peripheral side of the lower end of the matching inclined plate 9;

[0037] The fixing device includes a through hole 12 penetrating through the center end of the lifting baffle 4, a fixed pull rope 13 with one end fixedly arranged on the upper end of the lifting plate 8 and the other end passing through the through hole 12 and located above the lifting baffle 4, a winding column 14 arranged on the upper end surface of the lifting baffle 4 for the other end of the fixed pull rope 13 to be wound and fixed, and a plastic connecting end 15 arranged at the other end of the fixed pull rope 13 for the other end of the fixed pull rope 13 to be plastically deformed after the other end of the fixed pull rope 13 is wound on the winding column 14. The lower sealing plate 11 is a nylon plate or a rubber plate or a silicone plate or a polyurethane plate. The fixed pull rope 13 is a nylon rope or a PVC rope or a hemp rope or a cotton rope. The inclination angles of the two matching inclined plates 9 at the left and right ends of the lifting plate 8 are 155° to 160°. The tank body 1 is cylindrical in shape as a whole, the lifting baffle 4 is a circular plate, the side end face of the lifting baffle 4 is in gap with the inner wall of the tank body 1, the sealing block 6 is an annular block, and the deformation sealing plate 7, the lifting plate 8, the matching inclined plate 9, and the lower sealing plate 11 are all annular plates. The overall length of the fixed pull rope 13 can be set relatively long to facilitate the subsequent installation of the lifting baffle 4. The perforation 12 is opened at the center end position of the lifting baffle 4 to keep the lifting plate 8 as vertical as possible when the fixed pull rope 13 is pulled upward, reducing the tilting phenomenon of the lifting plate 8, and making the matching inclined plate 9 and the matching inclined surface 10 uniformly stressed. The limiting ring platform 3 is a T-shaped ring platform, the inner diameter of the upper part of the limiting ring platform 3 is in gap with the lifting baffle 4, and the inner diameter of the lower part of the limiting ring plate 3 is smaller than the inner diameter of the upper part, thereby limiting the position of the lifting baffle 4. After the can body 1 is packaged, a protective cover a1 is provided on the upper end surface of the can body 1, and the protective cover a1 is loosely matched with the closing cover 2. After the protective cover a1 is installed on the closing cover 2, the skirt of the protective cover a1 completely covers the closing cover 2, thereby protecting the closing cover 2 and reducing damage caused by corrosion or impact caused by contact with the outside world. The material of the protective cover a1 can be gray cardboard or PP (polypropylene) or PE (polyethylene) or PET (polyethylene terephthalate) or PS (polystyrene). The environmental protection characteristics of the protective cover a1 material can improve the environmental protection of the packaging. The material has less impact on the environment during production, use and disposal, and has the characteristics of low pollution, recyclability and degradability. The lower end of the conventional tank body 1 is a plane. In the present application, a lower concave surface a2 is provided in an annular manner on the circumferential side of the lower end of the tank body 1, and the lower concave surface a2 is communicated with the cavity 22. An upper concave surface a3 is provided upwardly on the lower end surface of the tank body 1, and the upper concave surface a3 is an upper concave surface a3 that is raised in an arc from bottom to top. By arranging the lower concave surface a2 and the upper concave surface a3, when the volume of nitrogen increases excessively, the lower end surface of the tank body 1 at the position of the upper concave surface a3 can be slightly sunken, which can prevent the circumferential side of the tank body 1 or the lower end of the tank body 1 from expanding and bulging, so that the tank body 1 can be placed more stably on a plane.A food-grade coating is also provided on the inner wall of the tank body 1, which is an acrylic coating. The acrylic coating does not contain harmful solvents, is environmentally friendly, does not contain harmful substances, is harmless to the human body, meets food safety standards, is resistant to water, alkali, salt, seawater, and oil, and has good aging and oxidation resistance, thereby improving the durability of the tank body 1.

[0038] The peripheral side of the closure cover 2 is connected to the tank body 1 by riveting or threading. The closure cover 2 and the tank body 1 are connected by riveting by a machine; the closure cover 2 and the inner wall of the upper end of the tank body 1 can also be threadedly connected by threading. When the closure cover 2 is riveted, the closure cover 2 is an easy-open cover structure, and when it is threaded, it can also be an easy-open cover or a T-shaped closure cover. The diameter of the score line of the easy-open cover is larger than the inner diameter of the upper part of the limiting ring platform, so as not to affect the lifting effect of the lifting baffle 4. When the closure cover 2 is an easy-open cover structure and is fixed to the tank body 1, when the tea in the tank needs to be taken out, the easy-open cover is pulled by the traditional method, and the cover is safely torn open along the score line. After the cover is taken out, the plastic connection end 15 and the fixed pull rope 13 are removed from the winding column 14 by hand, or the plastic connection end 15 and the fixed pull rope 13 are operated by tweezers for making tea.

[0039] The deformation sealing plate 7 is a rubber plate, a silicone plate or a polyurethane plate. Rubber, silicone and polyurethane all have good elastic effects and can be reset after elastic deformation.

[0040] The deformation mechanism includes an elastic connecting block 16 arranged between the lower sealing plate 11 and the lower end circumference of the matching inclined plate 9. The elastic connecting block 16 is a rubber block, a silicone block or a polyurethane block. The elastic connecting block 16 is fixedly connected to the lower sealing plate 11 and the lower end circumference of the matching inclined plate 9 respectively.

[0041] A deformation inner cavity 17 is defined inside the elastic connection block 16 , and the deformation inner cavity 17 is located at the upper half of the elastic connection block 16 .

[0042] The lower end surface of the sealing stopper 6 is provided with a slope surface 18, and the slope surface 18 is inclined from the outer side to the inner side of the tank body 1. The lower end surface of the sealing stopper 6 can also be a horizontal surface, but is preferably an inclined surface.

[0043] There are two winding posts 14, which are symmetrically arranged on both sides of the perforation 12. The upper end faces of the two winding posts 14 are provided with anti-slip discs 19, and the diameter of the anti-slip discs 19 is larger than the diameter of the winding posts 14. The upper end face of the lifting baffle 4 is located at the chamfered surface 21 at the upper end of the perforation 12. The distance between the two anti-slip discs 19 is smaller than the diameter of the easy-open cover score line of the closure cover 2. There can also be one winding post 14, but in this case, the diameter of the anti-slip disc 19 should be set larger to play a limiting role. The chamfered surface 21 can prevent the right-angle end of the perforation 12 from contacting the surface of the fixed pull rope 13 when the fixed pull rope 13 is bent at the upper end of the perforation 12, so that the lifting plate 8 can be continuously pulled upward when the fixed pull rope 13 is initially wound.

[0044] The lower end surface of the closing cover 2 is provided with a limiting block 5, the number of the limiting blocks 5 is the same as the anti-slip disk 19, the positions of the limiting blocks 5 and the anti-slip disk 19 correspond, and the limiting blocks 5 are rubber blocks or silicone blocks.

[0045] An auxiliary limiting plate 20 is fixedly provided at the lower end of the lifting baffle plate 4, and the auxiliary limiting plate 20 is used to limit the upward deformation of the deformation sealing plate 7 on the stopper.

[0046] The plastic connection end 15 is a wire core 151 disposed at the other end of the fixed pull rope 13. The wire core 151 is an iron wire, a stainless steel wire, a copper wire, or an aluminum wire. The outer side of the plastic wire is coated with a rubber coating 152. The rubber coating 152 is TPU, PE, PVC, or nylon. The wire core 151 can also be a galvanized iron wire. The diameter of the wire core 151 is 0.45 mm-0.7 mm, and the overall diameter after the rubber coating is 1.05 mm-1.3 mm.

[0047] The working principle of the present invention is as follows: when it is necessary to package tea leaves, all accessories are prepared and the other end of the fixed pull rope 13 is passed through the lifting baffle plate 4 from the through hole 12, and then the tea leaves are placed in the cavity 22 of the tank body 1 and the cavity 22 is filled with liquid nitrogen (not shown in the figure), and then the lifting plate 8 is quickly placed in the cavity 22 and pressed downward, and the lower sealing plate 11 first contacts the limiting ring platform 3 and deforms upward through the elastic connecting block 16, so that the lower sealing plate 11 passes downward through the limiting ring platform 3, and then is pressed down again to allow the matching inclined plate 9 to squeeze the deformed sealing plate 7 downward, so that the deformed sealing plate 7 is elastically deformed downward to The mating inclined plate 9 is located below the deformable sealing plate 7, and when the lower sealing plate 11 is squeezed with the deformable sealing plate 7, the elastic connecting block 16 is used to deform upward at the lower end circumference of the mating inclined plate 9. The lower sealing plate 11 is located below the sealing block 6 by utilizing the elastic deformation of the lower sealing plate 11 with the deformable sealing plate 7. At this time, the fixed pull rope 13 is slightly lifted upward by the hand and the lifting baffle 4 is placed into the cavity 22 from the opening on the tank body 1 until the lifting baffle 4 can no longer descend on the limiting ring platform 3, and then the fixed pull rope 13 is lifted upward to squeeze and fit the mating inclined plate 9 and the mating inclined surface 10, and the other end of the fixed pull rope 13 is pulled upward. One end is wound around the winding column 14. After the other end of the fixed pull rope 13 is wound, the other end of the pull rope is fixed to the winding column 14 through the plastic connecting end 15, so as to prevent the fixed pull rope 13 on the winding column 14 from loosening, so as to limit the descent of the lifting plate 8 in the cavity 22. Then the closing cover 2 is installed and fixed on the tank body 1 to seal the cavity 22, and the liquid nitrogen (not shown in the figure) is gasified in the cavity 22 to increase the volume of the nitrogen in the cavity 22. Since the matching inclined plate 9 and the lifting plate 8 are in the shape of a cover, the lifting plate 8 and the matching inclined plate 9 are pushed upward by the nitrogen, so that the matching inclined plate 9 The upper surface of the matching inclined plate 9 is more tightly attached to the matching inclined surface 10 to play a sealing role, and the lower sealing plate 11 is also pushed upward by the nitrogen. The elastic connecting block 16 is deformed upward at the lower end circumference of the matching inclined plate 9, so that the upper end surface of the lower sealing plate 11 is attached to the lower end surface of the sealing block 6 to achieve a sealing effect. The sealing is performed by the lower sealing plate 11, the matching inclined plate 9, and the closing cover 2 respectively, which can improve the sealing effect of the nitrogen in the cavity 22. When the closing cover 2 is deformed by external impact or collision, the nitrogen in the cavity 22 is not easy to leak out, which can improve the airtight effect of the nitrogen in the tank body 1.

[0048] The invention is intended to protect the structure of the product. The model of each component is not the content of the invention, and it is also a known technology. Any component on the market that can achieve the above functions of the invention can be selected and applied as a tea packaging can with improved airtightness. Therefore, the model and other parameters of the component are not described in detail in the invention. The contribution of the invention lies in the scientific combination of the components.

[0049] The above shows and describes the basic principles and main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. Anything not described in detail in the present invention is a well-known technology of those skilled in the art.

Claims

1. A tea packaging can with improved air tightness, comprising a can body with a cavity, a liquid nitrogen filled in the cavity and arranged on the can body, and a sealing cover arranged on the upper end surface of the can body for sealing the cavity, characterized in that: The invention also comprises a lifting baffle plate which can be lifted and arranged on the tank body and located in the cavity, a limiting ring platform which is arranged on the tank body and located in the cavity and is used to limit the lower end of the lifting baffle plate, a sealing block which is arranged on the tank body and located in the cavity, a deformable sealing plate which is arranged on the sealing block, a lifting plate which can be lifted and arranged in the cavity and is located below the lifting baffle plate, a matching inclined plate which is arranged on the peripheral side of the lifting plate, a matching inclined surface which is provided on the lower end surface of the deformable sealing plate and is used to fit with the inclined surface of the matching inclined surface, a fixing device which is arranged between the upper end surface of the lifting plate and the lifting baffle and is used to limit the descent of the lifting plate when the matching inclined surface fits with the inclined surface of the matching inclined plate, a lower sealing plate which is arranged on the peripheral side of the lower end of the matching inclined plate, and a deformation mechanism which is arranged between the lower sealing plate and the peripheral side of the lower end of the matching inclined plate and is used for the lower sealing plate to deform upward or downward on the peripheral side of the lower end of the matching inclined plate; The fixing device includes a through hole passing through the center end of the lifting baffle, a fixing pull rope with one end fixedly arranged on the upper end of the lifting baffle and the other end passing through the through hole and located above the lifting baffle, a winding column arranged on the upper end surface of the lifting baffle for the other end of the fixing pull rope to be wound and fixed, and a plastic connecting end arranged at the other end of the fixing pull rope for plastic deformation of the other end of the fixing pull rope after the other end of the fixing pull rope is wound on the winding column.

2. A tea packaging can with improved airtightness according to claim 1, characterized in that: The peripheral side of the closure cover is riveted or threadedly connected to the can body.

3. The tea packaging can with improved airtightness according to claim 1, characterized in that: The deformation sealing plate is a rubber plate, a silicone plate or a polyurethane plate.

4. The tea packaging can with improved airtightness according to claim 1, characterized in that: The deformation mechanism includes an elastic connecting block arranged between the lower sealing plate and the lower end circumference of the matching inclined plate, and the elastic connecting block is a rubber block or a silicone block or a polyurethane block, and the elastic connecting block is fixedly connected to the lower sealing plate and the lower end circumference of the matching inclined plate respectively.

5. The tea packaging can with improved airtightness according to claim 4, characterized in that: A deformation inner cavity is provided inside the elastic connection block, and the deformation inner cavity is located at the upper half of the elastic connection block.

6. The tea packaging can with improved airtightness according to claim 1, characterized in that: The lower end surface of the sealing stopper is provided with a slope surface, and the slope surface is inclined from the outer side to the inner side of the tank body.

7. The tea packaging can with improved airtightness according to claim 1, characterized in that: There are two winding columns in total, and the two winding columns are symmetrically arranged on both sides of the through hole. The upper end faces of the two winding columns are provided with anti-slip disks, and the diameter of the anti-slip disks is larger than the diameter of the winding columns. The upper end face of the lifting baffle is located at the chamfered surface of the upper end of the through hole.

8. The tea packaging can with improved airtightness according to claim 7, characterized in that: The lower end surface of the closing cover is provided with a limiting block, the number of the limiting blocks is the same as the anti-slip disk, the positions of the limiting blocks correspond to the anti-slip disk, and the limiting blocks are rubber blocks or silicone blocks.

9. The tea packaging can with improved airtightness according to claim 1, characterized in that: An auxiliary limiting plate is fixedly arranged at the lower end of the lifting baffle, and the auxiliary limiting plate is used to limit the upward deformation of the deformation sealing plate on the baffle.

10. The tea packaging can with improved airtightness according to claim 1, characterized in that: The plastic connecting end is a wire core body arranged at the other end of the fixed pull rope, the wire core body is iron wire or stainless steel wire or copper wire or aluminum wire, and the outer side of the plastic wire body is coated with a rubber layer, and the rubber layer is TPU or PE or PVC or nylon.

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