CN201774960U - Threaded groove intercepting filter tip - Google Patents

Abstract

The utility model provides a threaded groove intercepting filter tip, which consists of a wire beam core rod (1) and forming paper (4) covered at an outer layer and is characterized in that a layer of inner layer paper (2) for covering the wire beam core rod is arranged between the wire beam rod and the forming paper, uniformly distributed threaded grooves (3) surrounding the wire beam core rod are arranged on the inner layer paper (2), dense small drainage holes are distributed at the two walls of each groove, the vertical grooves are recessed into wire beams to compress the wire beam core rod, so that the center density can be increased, partial smoke gas can be forced to enter the vertical grooves with low absorption resistance through the small drainage holes, the smoke gas repeatedly flows into the grooves from the fiber of the filter tip and then flows into fiber from the grooves for repeating the process again and again for many times, and the effect of coke reducing mechanisms of proliferated sedimentation, dense flowing, small hole amplification and the like can be continuously realized, so the integrated effects of coke reduction and harm reduction of the fiber type filter tip can be exerted to the maximum degree.

Description

A kind of thread groove blocking filter rod

Technical field

The utility model relates to tobacco product, particularly a kind of filter fibrous type mouth rod of cigarette.

Background technology

The mechanism that fibrous type mouth rod is removed particle matter in the flue gas is exactly that mechanicalness is filtered, and its filter efficiency is relevant with size (quality and diameter), the movement velocity of particulate, the diffusion (distribution situation and the time of staying) of particulate in filament of particulate in the flue gas.Because particulate passes through the time very short (0.04 second) of mouth rod, the diameter of particulate very little (0.2 micron), and filametntary diameter (20 microns) is bigger 100 times than the diameter of particulate.Therefore, the fiber of mouth rod mechanical filter (holding back) rate that particulate is caused is very little.

Fibrous type mouth rod mechanicalness filter be exactly make particulate in flow path constantly and fiber bump the formation inertia impact.Because the quality of the movement velocity of particulate and particulate is all little, the momentum that motion produces just can not be big, and therefore, inertia impact is to the contribution of cigarette filter tip efficient also very little (account for total clearance 2%).

The disordered motion of particulate causes that the collision with fiber promptly forms the diffusion deposition.Studies show that the motion of low quality particulate is more more than high-quality person, the mistakes rate effect that when low flow velocity, causes because of diffusion just generally, this has been the time lengthening that stops in filter tip owing to particulate, makes particulate have more opportunity and spreads in filament.The particle removal that is caused by the diffusion deposition accounts for 65% of total clearance.

At present, cigarette props up generally to adopt and installs fibrous type mouth rod additional and alleviate the harm of smoking to human body, and the tow in the conventional fibre type mouth rod generally all is that straight bundle distributes, owing to added glue and the influence that rolls the process mechanism characteristic, it is uneven that the resistance to suction of filter tip distributes, and generally is that the center is little, big on every side.Therefore, flue gas mostly flows along the center of filter tip in filter tip fast, seldom to around diffusion, the mechanicalness filtering effect of tow occurs in the central area of filter tip substantially, the mechanicalness filter efficiency of tow is because of the smoke distribution inequality, and has a greatly reduced quality.Hold back efficient to satisfy the requirement of people for what improve fibrous type mouth rod, satisfy people again to the smoking demand simultaneously, must change original filter fibrous type mouth bar structure, reduce harmful ingredients in flue gas better and reduce tar content to reach to health.

The utility model content

The purpose of this utility model is exactly to hold back the not high defective of efficient for what overcome that existing fiber mouth rod exists, fiber mouth rod is carried out architecture advances, to improve the hold back efficient of fibrous type mouth rod to flue gas.

To achieve these goals, the utility model has adopted following technical proposals:

A kind of thread groove blocking filter rod, it is made up of the forming paper of stranded core rod and outer parcel, it is characterized in that being provided with between stranded core rod and the forming paper internal layer paper of one deck parcel stranded core rod, internal layer paper is provided with the thread groove that is evenly equipped with around stranded core rod, is evenly equipped with the drainage aperture of dense distribution on the two sides of thread groove respectively.V-shaped or the U type of the cross section of thread groove.

After the internal layer paper bag is wrapped up in stranded core rod, promptly formed the thread groove suitable mutually on the stranded core rod with internal layer paper.Internal layer paper is tobacco business fiber filter paper commonly used, also can be the cigarette paper of other type, and the thread groove vertical sectional shape can be V-arrangement, rectangle, trapezoidal, semicircle and other shape.They carry out equidistantly or not equidistant arrangement.

Internal layer paper enters opium pipe synchronously with outer paper after being pressed into required groove by indent mechanism, stranded core rod is rolled into filter fibrous type mouth rod, because the effect of plasticizer triacetyl glycerine is arranged in the stranded core rod, make tow by the moulding of internal layer paper shape, form concaveconvex structure between stranded core rod and internal layer paper and the outer paper simultaneously, drainage small aperture on its groove two sides is 0.01-1.0MM, flue gas enters groove through the drainage aperture, in the less groove of resistance, flow then around filter tip is peripheral, flow to the end, flow into the filter fiber from the drainage aperture again.Granule phase substance in the flue gas, when flowing out the drainage aperture, a fluid stream had both been produced condensation by fan-shaped amplification under hydrokinetic effect, and the flue gas aerosol particle is increased, and the speed that the flue gas particle of increase flows in groove also slows down thereupon.When flue gas enters the drainage aperture again, there are many flue gases can not enter the drainage aperture again because of particle increases, can enter that flue gas that the drainage aperture flows out is also easier to be held back by tow.With yew paper excellent the propping up with cigarette of above-mentioned fibrous type mouth sticked to one, efficiently hold back cigarette comprehensively thereby form unitary whole.

Advantage of the present utility model is:

1, thread groove structure, significant prolongation flue gas flow through the path and the time of filter tip.The efficient that makes filter tip hold back flue gas further improves;

2, the application of drainage aperture amplification principle has been created a brand-new fibrous type filter tip and has been fallen burnt mechanism, falls burnt machine-processed use in conjunction with " diffusion deposition " and " intensive flowing " two, can improve the burnt efficient of falling of fibrous type filter tip to greatest extent.The application of fluid dynamic " drainage aperture amplification principle " (air-flow is fan-shaped amplification when flowing out the drainage aperture) in filter tip, effectively little, the high volatility of the molecular weight in the cooled flue gas granule phase substance, harmful component cpd.Therefore present technique has tangible reducing poison function again.

Groove is like " cold well " (groove and the filter tip center temperature difference are very big), and the flue gas granule phase substance that flows through groove can be deposited by " cold well " condensation.Reduced and flowed into the maximum exhaust gas volumn of fiber again.Therefore groove also can be referred to as the new burnt mechanism of falling---" burnt mechanism falls in cold well ".

Therefore, the utility model patent develops and has innovated the lowering harm and decreasing coking mechanism of fibrous type filter tip.

3, by all kinds of resistance to suction pressure reduction zone is set in filter tip, burnt mechanism falls in the laying of science " diffusion deposition " and " intensive flowing ", utilize " drainage aperture " to be connected in series each resistance to suction pressure reduction zone cleverly, the guiding flue gas flows by design path, allows unordered flue gas accept to fall the effect of burnt mechanism in an orderly manner, repeatedly.The flow process of flue gas is extended simultaneously, and the time of flowing through filter tip is delayed, and realizes diffusion, the distribution of the fullest of flue gas in filter tip.

4, road number, the depth, the width of thread groove,, the number of the size of drainage small aperture, drainage aperture, the distribution situation of drainage aperture etc. become the design considerations of fibrous type filter tip lowering harm and decreasing coking efficient.Use multifactor optimal design means, can be organically, the technical characteristic and the parameter of the design filter tip of science, thus satisfy the desirability of kinds of cigarettes to greatest extent, more efficiently to lowering harm and decreasing coking.

5, " the drainage aperture " on the internal layer forming paper can " off-line ", also can adopt online mode of adopting laser, static or mechanical punching to make.

For the utility model is described in further detail, following accompanying drawing provides a most preferred embodiment.

Description of drawings:

Fig. 1 is a front view of the present utility model;

Fig. 2 is the A-A partial sectional view of Fig. 1.

The specific embodiment:

As shown in Figure 1 and Figure 2, shown in, a kind of thread groove blocking filter rod that the utility model provides, it is made up of the forming paper 4 of stranded core rod 1 and outer parcel, be provided with the internal layer paper 2 of one deck parcel stranded core rod between stranded core rod and the forming paper, internal layer paper 2 is provided with the uniform thread groove 3 around stranded core rod.

As shown in Figure 2, be evenly equipped with the drainage aperture 5 of dense distribution on the two sides of thread groove 3 respectively, drainage aperture 5 quantity can be provided with 1-500 on every centimetre length, the V-shaped or U type of the cross section of thread groove, and the aperture is 0.01-1.0MM.

Thread groove has increased flowing through of flue gas.Prolonged flue gas and flowed through time of filter tip, made flue gas hold back efficient and further improve; Longitudinal groove compresses stranded core rod to the center, and center density is increased, and forces partial fume to flow through the drainage aperture and enters longitudinal groove, because amplify suddenly in the space, longitudinal groove plays the effect of cold well, and partial fume is condensed.So pass through the thread groove and the drainage aperture of multiple tracks short-circuited conducting sleeve repeatedly, the particulate in the flue gas is held back significantly.

Claims (2)

1. thread groove blocking filter rod, it is made up of the forming paper (4) of stranded core rod (1) and outer parcel, it is characterized in that being provided with between stranded core rod and the forming paper internal layer paper (2) of one deck parcel stranded core rod, internal layer paper (2) is provided with the uniform thread groove around stranded core rod (3), is evenly equipped with drainage aperture (5) on the two sides of thread groove respectively.

2. a kind of thread groove blocking filter rod according to claim 1 is characterized in that the V-shaped or U type of cross section of thread groove (3).

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