Filter tip

Abstract

The utility model provides a filter tip which is organically combined with a blasting bead, and relates to the technical field of preparation of blasting beads. The filter tip is of an integrated type or an external type; the integrated filter tip comprises a cooling section (5), a blasting bead section (6) and a filtering section (7), the outer layer is a cavity pipe (8) which extends from the cooling section (5) to the blasting bead section (6) and the filtering section (7); the external filter tip comprises a connecting sleeve (16), a cooling section (5), a blasting bead section (6), a filtering section (7) and a mouth-holding section (17); a blasting bead is arranged in a blasting bead section (6) of the filter tip and comprises uniformly arranged spherical colloidal particles (1) and a solid plastic perfume composition distributed and filled between the transverse spherical colloidal particles (1) and the longitudinal spherical colloidal particles (1). The shell is provided with a three-layer structure functional layer; the overall water content of the blasting bead is greatly higher than that of a traditional blasting bead; according to the filter tip, the blasting bead can provide a good moisture preservation effect while increasing the smoke fragrance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cigarette filters, in particular to a filter. BACKGROUND

[0002] A burst bead is a tiny capsule wrapped in a cigarette filter, containing various flavors, extracts or other functional ingredients. When the smoker smokes, the burst bead is squeezed and broken, releasing the liquid inside, bringing a unique taste and aroma to the cigarette. The burst bead for cigarettes is mainly divided into oil or water burst beads according to the internal components, and each has different emphases. Among them, the oily substances include various fat-soluble fragrances and plant extracts, which have the advantages of good stability, relatively slow release of aroma, and can continuously release fragrance for a long time, which can ensure the continuous release of rich and lasting aroma during the smoking process. The aqueous substances are mainly used for the purpose of smoke moisturizing, increasing the humidity of smoke, improving the taste, neutralizing some irritating components, and making the taste more soft; but it is not suitable for making burst beads for cigarettes. First, the common burst bead wall material is hydrophilic, and the barrier property to water-soluble substances is relatively poor. When using water-soluble flavor as the core liquid, it is easy to cause the softening, dissolution or permeability of the wall material to increase, thereby reducing the stability and integrity of the burst bead. Second, when the water-soluble flavor contacts the wall material, it may cause the wall material to swell or dissolve due to water absorption, resulting in unstable structure of the burst bead, and the burst bead is easy to break. Third, the leaked aqueous components can cause mold spots on the cigarette, causing serious quality accidents, while the oily substances will not cause mold spots. Fourth, the aroma release speed of water-soluble flavor is too fast, but the aroma duration is short, which cannot provide a long-lasting olfactory experience.

[0003] Some researchers use concentric circle drop heads to realize the burst bead containing aqueous substances, which wraps the aqueous substances inside the oily substances and sets the shell outside. This way has high requirements for the production and control process precision of the drop pill machine, and the cost is high; and the intermediate layer material used to wrap the aqueous substances will denature during the preparation process, affecting the overall appearance of the burst bead.

[0004] In addition, some schemes use oil-water mixed emulsion as the core liquid of the burst bead for preparation. Water or water-soluble, oil or oil-soluble substances are integrated together in the form of emulsion, and are prepared by homogenizing emulsion.

[0005] Water used in cigarettes can increase gas humidity, improve taste, neutralize some of the irritating components in the smoke, and make the taste smoother. However, water can easily damage the cigarette wall material and contaminate the cigarette. Oily substances have good stability and slow-release properties, but their functions are limited. Combining the two can not only add up their functions, but also introduce new water-soluble flavoring substances, enriching the variety of cigarette products. However, there are several challenges in combining the two. Therefore, it is necessary to provide a cigarette flavor capsule that combines oily and watery substances, so as to give full play to the advantages of both while avoiding the accumulation of defects. Summary of the Invention

[0006] To address the aforementioned problems, the purpose of this application is to provide an emulsified core liquid flavoring bead and a filter tip organically integrated with the flavoring bead. Firstly, by structurally improving the internal components of the flavoring bead and structurally grading the outer shell, an anti-leakage structure is established, resulting in a tobacco flavoring bead with high internal water content and a stable oil-water balance. This allows the flavoring bead to provide better moisture retention while enhancing the aroma of the smoke.

[0007] A filter tip includes a cooling section 5, a popping bead section 6, and a filtering section 7; the outer layer of the entire filter tip is a hollow tube 8, which extends from the cooling section 5 to the popping bead section 6 and the filtering section 7.

[0008] The length of the cooling section 5 is 1 / 3 of the total filter length. Its end is connected to the cigarette stick, and its front end is connected to the flavor capsule section 6. Filter filament bundle 9 is installed inside.

[0009] The filter section 7 is located at the front end of the entire filter nozzle, and a filter fiber bundle 9 is installed inside it, with its end connected to the popping bead section 6.

[0010] The outer side of the bursting bead section 6 is fitted with a hollow tube 8, and a cylindrical soft air guide 10 is provided inside. A fiber air guide layer is provided on the outer circumference of the air guide 10, and the hollow tube 8 and the air guide 10 are connected through the fiber air guide layer.

[0011] The gas-conducting component 10 is a double-layered concentric cylindrical tube. An explosion bead is disposed within the inner cylindrical tube 11. This explosion bead comprises an internal component and an outer shell. The internal component includes uniformly arranged elastic and resilient spherical particles 1, and a solid plastic fragrance composition distributed and filled between the transverse and longitudinal spherical particles 1. The outer diameter of each spherical particle 1 is 0.3-0.5 mm, and it has cavities with a diameter of 0.1-0.3 mm inside, encapsulating an emulsion core liquid. The outer shell encapsulates the internal component and has a three-layer structure: an inner molding layer 2 for encapsulating the internal component to form a semi-finished product; a middle adhesive layer 3 for connecting the inner and outer layers; and an outer waterproof layer 4, which is wrapped on the outermost side.

[0012] The inner layer cylindrical tube 11 and the outer layer cylindrical tube 12 are provided with a plurality of permeation holes 13, and a plurality of spiral air guide strips 14 connecting the inner layer cylindrical tube 11 and the outer layer cylindrical tube 12 are arranged between the inner layer cylindrical tube 11 and the outer layer cylindrical tube 12, the spiral air guide strips 14 are spirally arranged from the bottom to the top of the inner layer cylindrical tube 11 and the outer layer cylindrical tube 12, and adjacent spiral air guide strips 14 are parallel to each other; and a guide groove with a spacing of 1-2 mm and a terminal pointing to the center of the air guide solid 10 is arranged on the surface of the spiral air guide strip 14.

[0013] In addition, a pyramid-shaped protrusion 15 pointing to the center is arranged on the inner surface of the wall of the inner layer cylindrical tube 11 at a position away from the permeation hole 13, and the spacing between any two adjacent pyramid-shaped protrusions 15 is less than the diameter of the burst ball.

[0014] A filter includes a connecting sleeve 16, a cooling section 5, a burst ball section 6, a filtering section 7, and a mouthpiece 17.

[0015] The cooling section 5, the burst ball section 6, and the filtering section 7 are wrapped by a soft cavity tube 8 to form an integral whole; the inner side of the end of the cooling section 5 is provided with a stepped ring-shaped protrusion 18, which cooperates with a stepped ring-shaped groove 19 at the front end of the connecting sleeve 16 to realize connection, in addition, the inside of the connecting sleeve 16 is provided with a plurality of segments with different diameters; the end of the mouthpiece 17 is provided with the same stepped ring-shaped groove 19 as the front end of the connecting sleeve 16, which cooperates with the stepped ring-shaped protrusion 18 arranged on the inner side of the front end of the filtering section 7 to realize connection.

[0016] The length of the cooling section 5 is 1 / 3 of the length of the entire filter, the end of the cooling section 5 is connected with a cigarette, and the front end of the cooling section 5 is connected with the burst ball section 6.

[0017] The inside of the filtering section 7 is provided with a cooling foil parallel to the direction of the smoke flow, and the inside of the cooling section 5 is provided with a filter tow 9.

[0018] The burst ball section 6 shares a soft cavity tube 8 with the cooling section 5 and the filtering section 7, and a hollow inner tube concentric with the soft cavity tube 8 is arranged in the soft cavity tube 8 of the burst ball section 6, and a burst ball is arranged in the hollow inner tube, the burst ball includes an inner member and an outer shell; wherein the inner member includes uniformly arranged spherical gel particles 1 with elasticity and toughness, and a solid plastic flavor composition distributed and filled between the transverse and longitudinal spherical gel particles 1; the spherical gel particles 1 have an outer circle diameter of 0.3-0.5 mm, have a hollow inside with a diameter of 0.1-0.3 mm, and wrap an emulsified core liquid; the outer shell wraps the inner member and has a three-layer structure functional layer; the inner layer is a forming layer 2 for wrapping the inner member to form a semi-finished product; the middle layer is an adhesive layer 3 for connecting the inner and outer layers; and the outer layer is a waterproof layer 4 wrapped on the outermost side.

[0019] A plurality of permeation holes 13 are arranged on the inner tube wall, and a plurality of spiral air guide strips 14 connecting the hollow inner tube and the soft cavity tube 8 are arranged between the tube walls of the two, the spiral air guide strips 14 are spirally arranged from the bottom to the top of the two, adjacent spiral air guide strips 14 are parallel to each other; and a guide groove with a spacing of 1-2 mm and a terminal pointing to the center of the air guide solid 10 is arranged on the surface of the spiral air guide strip 14; a pyramid-shaped protrusion 15 pointing to the center is arranged on the inner surface of the inner tube wall at a position staggered with the permeation holes 13, and the spacing between any two adjacent pyramid-shaped protrusions 15 is less than the diameter of the burst ball.

[0020] The beneficial effects of the present application are:

[0021] The emulsified core liquid burst ball of one of the purposes of the present application has the spherical gel particles 1 with elasticity and toughness arranged uniformly, and the solid plastic perfume composition distributed and filled between the transverse and longitudinal spherical gel particles 1, which can better wrap the emulsion and the perfume composition containing water, the water fixed by the spherical gel particles 1 is not easy to exude, the water retention effect is strengthened, the direct contact between the water and the burst ball shell is minimized, the shell is prevented from being damaged, the burst ball has good perfuming and water retention effects; and the shell of the burst ball is a three-layer structure functional layer, each structure layer has its own function and plays its own role, realizes the wrapping, connection and waterproof function of the whole shell, and the overall water content of the burst ball is much higher than that of the traditional burst ball; the filter tip of the second purpose of the present application is specially provided with the burst ball section 6 which can facilitate the burst ball to easily break under the action of external pressure, the prismatic protrusions provided on the burst ball section 6 pierce the burst ball, and the contents of the burst ball are diffused to the whole smoke passage through the permeation holes 13, so that a smoke burst ball with high internal water content and stable oil and water balance, and a filter tip capable of increasing the smoke flavor and providing good moisturizing effect are finally obtained. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a sectional view of the burst ball.

[0023] Figure 2 is a structural schematic view of the integrated filter tip.

[0024] Figure 3 is a structural schematic view of the air guide solid in the integrated filter tip.

[0025] Figure 4 is a sectional view of the integrated filter tip.

[0026] Figure 5 is a structural schematic view of the external filter tip.

[0027] Figure 6This is a schematic diagram showing the connection between the annular protrusion and the annular groove.

[0028] Figure 7 This is a cross-sectional view of the external filter.

[0029] Figure 8 This is a schematic diagram of the structure of the spiral air guide strip.

[0030] In the diagram, 1 is the spherical granule, 2 is the molding layer, 3 is the adhesive layer, 4 is the waterproof layer, 5 is the cooling section, 6 is the bursting bead section, 7 is the filter section, 8 is the cavity tube, 9 is the filter fiber bundle, 10 is the air guiding component, 11 is the inner cylindrical tube, 12 is the outer cylindrical tube, 13 is the permeation hole, 14 is the spiral air guiding strip, 15 is the pyramidal protrusion, 16 is the connecting sleeve, 17 is the mouth section, 18 is the annular protrusion, and 19 is the annular groove. Detailed Implementation Example 1

[0031] like Figures 1-4 As shown, this embodiment provides an emulsion core liquid bursting bead and an integrated filter tip.

[0032] An emulsion core fluid bursting bead, which consists of two parts: an internal component and an outer shell.

[0033] The internal components include uniformly arranged elastic and tough spherical particles 1, and a solid plastic fragrance composition distributed and filled between the transverse and longitudinal spherical particles 1; the outer diameter of the spherical particles 1 is 0.5 mm, and the interior has cavities with a diameter of 0.3 mm that encapsulate the emulsion core liquid; the spherical particles 1 described in this application are formed by a gelling agent, and the molecular chains of the gelling agent can fix a certain amount of liquid molecules, thereby forming spherical particles 1 with pores, and the internal space of the spherical particles 1 contains the emulsion.

[0034] The outer shell encloses the internal components and has a three-layer structure: the inner layer is a molding layer 2, which is used to enclose the internal components to form a semi-finished product; the middle layer is an adhesive layer 3, which is used to connect the inner and outer layers; and the outer layer is a waterproof layer 4, which is wrapped on the outermost side.

[0035] The molding layer 2 is a hard film formed by the reaction of calcium ions dissolved in the internal components and sodium alginate dissolved in the adhesive. Under the action of gravity and surface tension, it takes the shape of a sphere and wraps the internal components, serving as the core functional component of the popping bead. The adhesive layer 3 is formed by spraying a mixture of adhesive and ultrafine talc powder onto the surface of the molding layer 2 to connect the inner molding layer 2 and the outermost waterproof layer 4. The waterproof layer 4 is a resin material that is bonded to the outermost layer of the popping bead through the adhesive layer 3 to provide waterproofing.

[0036] The explosion bead described in the present application has a higher overall pressure resistance than the existing standard limit value of 60% or more due to the internal components including the spherical gel particles 1, the solid plastic flavor composition, and the oil-water mixed emulsion wrapped in the spherical gel particles 1, and the three structural layers provided on the outer surface to achieve water permeation resistance. According to the relevant standards such as YC / T 195-2005 "Standard System for Tobacco Materials", YC / T 164-2012 "Tobacco Flavor", YC / T 608-2024 "General Technical Conditions for Cigarette Explosion Bead Strength Tester", YC / T 145.6-1998 "General Evaluation Method for Aroma Quality of Tobacco Flavor", the overall pressure resistance of the explosion bead is 20-30N, and the overall pressure resistance of the explosion bead described in the present application reaches 40N. Therefore, a new type of filter is needed to cooperate with it to facilitate the breaking of the explosion bead and fully exert its effect. Example 2

[0037] An integrated filter includes a cooling section 5, an explosion bead section 6, and a filtering section 7. The outer layer of the entire filter is a hollow tube 8 extending from the cooling section 5 to the explosion bead section 6 and the filtering section 7.

[0038] The length of the cooling section 5 is 1 / 3 of the length of the entire filter, the end thereof is connected to a cigarette, the front end is connected to the explosion bead section 6, and a filter tow 9 is arranged inside the cooling section 5. The filtering section 7 is arranged at the front end of the entire filter, a filter tow 9 is arranged inside the filtering section 7, and the end of the filtering section 7 is connected to the explosion bead section 6.

[0039] The explosion bead section 6 is sleeved with the hollow tube 8 on the outside, and a cylindrical soft air guide solid 10 is arranged inside the explosion bead section 6. A fiber air guide layer is arranged on the outer circumference of the air guide solid 10, and the hollow tube 8 and the air guide solid 10 are connected through the fiber air guide layer. The air guide solid 10 is a double-layer concentric cylindrical tube as a whole, a plurality of penetration holes 13 are arranged on the inner layer tube wall and the outer layer tube wall, and a plurality of spiral air guide strips 14 connecting the inner layer tube wall and the outer layer tube wall are arranged between the inner layer tube wall and the outer layer tube wall. The spiral air guide strips 14 are spirally arranged from the bottom to the top of the inner layer tube wall and the outer layer tube wall, and adjacent spiral air guide strips 14 are parallel to each other. A guide groove with a spacing of 2mm and a terminal end pointing to the center of the air guide solid 10 is arranged on the surface of the spiral air guide strip 14. When external pressure is applied, the guide groove can be easily bent to make the inner layer tube wall and the outer layer tube wall fit together. In addition, a pyramid-shaped protrusion 15 pointing to the center is arranged on the inner surface of the inner layer tube wall at a position away from the penetration hole 13. The hardness of the pyramid-shaped protrusion is greater than that of the inner layer tube wall and the outer layer tube wall, and the distance between any two adjacent pyramid-shaped protrusions 15 is less than the diameter of the explosion bead described in the present application. When external pressure is applied, the pyramid-shaped protrusion can pierce the explosion bead shell to release the contents. Example 3

[0040] As Figure 1 and 5As shown in Fig. 8, the present embodiment provides an emulsified core liquid burst bead and an external filter.

[0041] An emulsified core liquid burst bead, which is basically the same as that described in Embodiment 1, is different in that the outer circle diameter of the spherical colloidal particle 1 is 0.3 mm, and the inside has a hollow with a diameter of 0.1 mm and wraps the emulsified core liquid. Embodiment 4

[0042] An external filter, which comprises a connecting sleeve 16, a cooling section 5, a burst bead section 6, a filtering section 7 and a mouthpiece section 17.

[0043] The cooling section 5, the burst bead section 6 and the filtering section 7 are wrapped as a whole by a soft cavity tube 8; the inner side of the end of the cooling section 5 is provided with a stepped ring-shaped protrusion 18, which cooperates with a stepped ring-shaped groove 19 at the front end of the connecting sleeve 16 to realize connection, in addition, the inside of the connecting sleeve 16 is provided with several sections with different diameters to adapt to cigarettes with different sizes; the end of the mouthpiece section 17 is provided with the same stepped ring-shaped groove 19 as that at the front end of the connecting sleeve 16, which cooperates with a stepped ring-shaped protrusion 18 provided at the inner side of the front end of the filtering section 7 to realize connection.

[0044] The length of the cooling section 5 is 1 / 3 of the length of the whole filter, the end thereof is connected with a cigarette, and the front end thereof is connected with the burst bead section 6.

[0045] The inside of the filtering section 7 is provided with cooling foils parallel to the direction of the flow of smoke, and the inside of the filtering section 7 is provided with filtering tow 9.

[0046] The burst bead section 6, the cooling section 5 and the filtering section 7 share a soft cavity tube 8, and a hollow inner tube concentric with the soft cavity tube 8 is arranged in the soft cavity tube 8 of the burst bead section 6, a plurality of permeation holes 13 are arranged on the wall of the inner tube, a plurality of spiral air guide strips 14 connecting the hollow inner tube and the soft cavity tube 8 are arranged between the wall of the hollow inner tube and the wall of the soft cavity tube 8, the spiral air guide strips 14 are spirally arranged from the bottom to the top of the two, and adjacent spiral air guide strips 14 are parallel to each other; and a guide groove with a spacing of 1 mm and with the end pointing to the center point of the air guide solid 10 is arranged on the surface of the spiral air guide strip 14, which can be easily bent to make the hollow inner tube and the soft cavity tube 8 fit together when external pressure is applied; in addition, a pyramid-shaped protrusion 15 pointing to the center is arranged on the inner surface of the wall of the inner tube at a position away from the permeation holes 13, the hardness of the pyramid-shaped protrusion is greater than that of the wall of the inner tube and the wall of the soft cavity tube 8, and the distance between any two adjacent pyramid-shaped protrusions 15 is less than the diameter of the burst bead, so that the pyramid-shaped protrusion can pierce the shell of the burst bead and release the content when external pressure is applied.

[0047] The above produced burst beads were detected according to the requirements of the relevant standards such as YC / T 195-2005 "Cigarette Material Standard System", YC / T 164-2012 "Cigarette Essence", YC / T 608-2024 "General Technical Conditions for Cigarette Burst Bead Strength Tester", YC / T 145.6-1998 "General Evaluation Method for Aroma Quality of Cigarette Essence", etc., mainly including physical indicators, appearance, safety and water content parameters.

[0048] Table 1

[0049]

Claims

1. A filter, characterized in that, Including cooling section (5), burst bead section (6) and filter section (7);The outer layer of the whole filter is cavity tube (8), which extends from cooling section (5) to burst bead section (6) and filter section (7); The length of cooling section (5) is 1 / 3 of the length of the whole filter, the end is connected with cigarette, the front end is connected with burst bead section (6), and filter tow (9) is arranged in the inside; Filter section (7) is arranged at the front end of the whole filter, filter tow (9) is arranged in the inside, and the end is connected with burst bead section (6); The outer side of burst bead section (6) is sleeved with cavity tube (8), and cylindrical soft air guide solid (10) is arranged in the inside, fiber air guide layer is arranged on the outer circumference of air guide solid (10), and cavity tube (8) and air guide solid (10) are connected through fiber air guide layer; Air guide solid (10) is a double-layer concentric cylindrical pipe as a whole, burst beads are arranged in the inner layer cylindrical pipe (11), the burst beads include two parts of inner member and shell;The inner member includes uniformly arranged spherical rubber particles (1) with elasticity and toughness and solid plastic flavor composition distributed and filled between the spherical rubber particles (1) in the horizontal and vertical directions;The spherical rubber particles (1) have an outer circle diameter of 0.3-0.5 mm, have a cavity with a diameter of 0.1-0.3 mm in the inside and wrap emulsified core liquid;The shell wraps the inner member and has a three-layer structure functional layer;The inner layer is a forming layer (2) for wrapping the inner member to form a semi-finished product;The middle layer is an adhesive layer (3) for connecting the inner and outer layers;The outer layer is a waterproof layer (4) wrapped on the outermost side; A plurality of permeation holes (13) are arranged on the pipe wall of the inner layer cylindrical pipe (11) and the outer layer cylindrical pipe (12), and a plurality of spiral air guide strips (14) connecting the inner layer cylindrical pipe (11) and the outer layer cylindrical pipe (12) are arranged between the inner layer cylindrical pipe (11) and the outer layer cylindrical pipe (12), the spiral air guide strips (14) are spirally arranged from the bottom to the top of the inner layer cylindrical pipe (11) and the outer layer cylindrical pipe (12), and adjacent spiral air guide strips (14) are parallel to each other;And a guide groove with a spacing of 1-2 mm and a terminal pointing to the center of the air guide solid (10) is arranged on the surface of the spiral air guide strip (14). In addition, pyramid-shaped protrusions (15) pointing to the center are arranged on the inner surface of the wall of the inner layer cylindrical pipe (11) at positions staggered with the permeation holes (13), and the spacing between any two adjacent pyramid-shaped protrusions (15) is less than the diameter of the burst bead.

2. A filter, characterized in that, Including connecting sleeve (16), cooling section (5), burst bead section (6), filter section (7) and mouthpiece section (17); Cooling section (5), burst bead section (6) and filter section (7) are wrapped into a whole by soft cavity tube (8);The inner side of the end of cooling section (5) is provided with stepped annular protrusion (18), which is matched with stepped annular groove (19) at the front end of connecting sleeve (16) to realize connection, in addition, the inside of connecting sleeve (16) is provided with several sections with different diameters;The end of mouthpiece section (17) is provided with the same stepped annular groove (19) at the front end of connecting sleeve (16), which is matched with stepped annular protrusion (18) arranged on the inner side of the front end of filter section (7) to realize connection; The length of the cooling section (5) is 1 / 3 of the whole filter length, the end of which is connected with the cigarette, and the front end is connected with the burst ball section (6); The inside of the filter section (7) is provided with cooling foil which is parallel to the direction of the smoke flow, and the inside of the cooling section (5) is provided with filter tow (9); The burst ball section (6) shares a soft cavity tube (8) with the cooling section (5) and the filter section (7), and a hollow inner tube which is concentric with the soft cavity tube (8) is arranged in the soft cavity tube (8) of the burst ball section (6), and the burst ball is arranged in the hollow inner tube, which includes two parts of inner member and shell; wherein the inner member includes uniformly arranged spherical rubber particles (1) with elasticity and toughness, and solid plastic flavor composition distributed and filled between the spherical rubber particles (1) in the horizontal and vertical directions; the spherical rubber particles (1) have an outer circle diameter of 0.3-0.5mm, have a hollow inside with a diameter of 0.1-0.3mm and wrap emulsified core liquid; the shell wraps the inner member, which has a three-layer structure functional layer; the inner layer is a forming layer (2) for wrapping the inner member to form a semi-finished product; the middle layer is an adhesive layer (3) for connecting the inner and outer layers; and the outer layer is a waterproof layer (4) wrapped on the outermost side; A plurality of permeation holes (13) are arranged on the inner tube wall, and a plurality of spiral air guide strips (14) connecting the hollow inner tube and the soft cavity tube (8) are arranged between the tube walls of the hollow inner tube and the soft cavity tube (8), the spiral air guide strips (14) are spirally arranged from the bottom to the top of the two, and adjacent spiral air guide strips (14) are parallel to each other; and a guide groove with an interval of 1-2mm and a terminal pointing to the center point of the air guide solid member (10) is arranged on the surface of the spiral air guide strip (14); a pyramid-shaped protrusion (15) pointing to the center is arranged on the inner surface of the inner tube wall at a position away from the permeation hole (13), and the distance between any two adjacent pyramid-shaped protrusions (15) is less than the diameter of the burst ball.

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