CN116441187A - Filter rod pressure drop on-line detection method and detection device - Google Patents

Filter rod pressure drop on-line detection method and detection device Download PDF

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Publication number
CN116441187A
CN116441187A CN202310408109.8A CN202310408109A CN116441187A CN 116441187 A CN116441187 A CN 116441187A CN 202310408109 A CN202310408109 A CN 202310408109A CN 116441187 A CN116441187 A CN 116441187A
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CN
China
Prior art keywords
filter rod
drum
detection device
filter
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310408109.8A
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Chinese (zh)
Inventor
张能
赵佳成
白朝矗
杨佳东
李永福
孙洁霖
林鸿佳
崔宇翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongyun Honghe Tobacco Group Co Ltd
Original Assignee
Hongyun Honghe Tobacco Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hongyun Honghe Tobacco Group Co Ltd filed Critical Hongyun Honghe Tobacco Group Co Ltd
Priority to CN202310408109.8A priority Critical patent/CN116441187A/en
Publication of CN116441187A publication Critical patent/CN116441187A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Measuring Fluid Pressure (AREA)

Abstract

The invention discloses an online detection method and detection device for pressure drop of a filter stick, wherein the online detection method and detection device comprises a feeding drum, a detection drum and a discharge drum, wherein the feeding drum and the discharge drum are positioned at two sides of the detection drum, an air inlet pressure detection device and an air outlet pressure detection device are arranged at two sides of the detection drum, a filter stick existence detection photoelectric switch is arranged between the detection drum and the feeding drum, a sealing cover is arranged between the air inlet pressure detection device and the air outlet pressure detection device, and the air inlet pressure detection device, the air outlet pressure detection device and the filter stick existence detection photoelectric switch are electrically connected with a PLC. The invention can detect the pressure drop of all the produced filter sticks on line and remove filter sticks with unqualified pressure drop in time, thereby ensuring the quality of products and reducing the consumption cost.

Description

Filter rod pressure drop on-line detection method and detection device
Technical Field
The invention relates to a detection device, in particular to an online detection device for pressure drop of a filter rod.
Background
The cigarette smoke resistance and the pressure drop of the filter stick for cigarettes are important physical indexes, so that the cigarette smoke resistance and the pressure drop of the filter stick for cigarettes not only directly affect the difficulty of smoking cigarettes by consumers, but also have close relations with indexes such as tar content, smoke nicotine content, smoke carbon monoxide content and the like of the cigarettes.
The measurement of cigarette suction resistance and filter stick pressure drop is represented by static pressure difference at two ends of a cigarette when airflow with a certain flow flows through the cigarette, and the difference is that the cigarette suction resistance is measured only in a certain atmospheric environment, and the cylindrical surface of the filter stick is required to be sealed when the filter stick pressure drop is measured. Therefore, the cigarette smoke resistance on-line detection device has mature application, but the measurement of the pressure drop of the filter sticks can only realize off-line spot check, and the pressure drop of all the filter sticks is difficult to realize. The filter rod with unqualified pressure drop enters a cigarette making link, and part of the filter rod can be removed due to unqualified cigarette resistance, so that the production and consumption cost of the cigarette is increased; part of this will flow into the market, affecting the consumer's pumping experience.
For the measurement of the pressure drop of the filter stick, the off-line detection equipment is used for sampling detection at present, the filter stick is completely sealed in the measurement equipment according to the measurement principle, the constant air flow of 17.5ml/s flows through the filter stick, and the static pressure difference at two ends is measured to be the pressure drop of the filter stick. Sampling detection can only reflect the overall situation, and it is difficult to ensure that the pressure drop of all filter rods is qualified.
Disclosure of Invention
The invention aims to provide an on-line detection device for pressure drop of filter sticks, which solves the technical problems in the prior art, can detect the pressure drop of all produced filter sticks on line and remove filter sticks with unqualified pressure drops in time, thereby ensuring the quality of products and reducing the consumption cost.
The invention provides an online detection method for pressure drop of a filter stick, which comprises the following steps:
step a, setting a closed space, and setting a first station and a second station in the closed space;
b, when the filter stick enters the first station, introducing stable compressed air into the filter stick from one end of the first station, and enabling the compressed air to enter the closed space from the cylindrical surface of the filter stick so as to enable the interior of the closed space to reach a preset air pressure environment;
step c, the filter stick leaves the first station and enters the second station, stable compressed air is introduced into the filter stick from one end of the second station, the air pressure P1 at the end is detected, the compressed air passes through the filter stick and is discharged from the other end of the second station, and the air pressure P2 at the end is detected;
and d, obtaining a pressure difference P3 by making a difference between the P1 and the P2, judging whether the filter stick is qualified according to the values of the P1, the P2 and the P3, and conveying the qualified filter stick to the next process, wherein the unqualified filter stick is removed.
In the aforementioned method for on-line detection of filter rod pressure drop, preferably, the first station and the second station are fed with 17.5ml/s of stable compressed air.
In the foregoing method for online detecting pressure drop of a filter rod, preferably, when P1, P2 and P3 are all within a preset value range, the filter rod is a qualified product;
and when P1 is smaller than a preset value or P2 is larger than the preset value, judging that no filter stick exists at the position, and if no filter stick exists at 10 continuous positions, reporting red information of 'detecting the blockage of the filter stick of the drum'.
In the foregoing filter rod pressure drop online detection method, preferably, a filter rod presence detection device is disposed at the feed end, and when the filter rod presence detection device does not detect a filter rod, and the values of the continuous 10 positions P1 or P2 are all within a preset value range, the filter rod presence detection device is automatically stopped, and a red message of "detection failure of the air inlet or outlet end" is reported.
The filter stick pressure drop on-line detection device used for realizing the filter stick pressure drop on-line detection method comprises a feeding drum, a detection drum and a discharging drum, wherein the feeding drum and the discharging drum are positioned on two sides of the detection drum, an air inlet pressure detection device and an air outlet pressure detection device are arranged on two sides of the detection drum, a filter stick existence detection photoelectric switch is arranged between the detection drum and the feeding drum, a sealing cover is arranged between the air inlet pressure detection device and the air outlet pressure detection device, and the air inlet pressure detection device, the air outlet pressure detection device and the filter stick existence detection photoelectric switch are electrically connected with a PLC.
In the foregoing filter rod pressure drop online detection device, preferably, the air inlet pressure detection device includes an air inlet end graphite block, a main air inlet channel, a first branch air inlet channel and a second branch air inlet channel are arranged in the air inlet end graphite block, one end of the main air inlet channel is connected with an air source, the other end of the main air inlet channel is connected with the first branch air inlet channel and one end of the second branch air inlet channel, the other ends of the first branch air inlet channel and the second branch air inlet channel are connected with the detection drum, the first branch air inlet channel is located near one side of the feeding drum, and the second branch air inlet channel is located near one side of the discharging drum.
In the foregoing filter rod pressure drop online detection device, preferably, a first pressure sensor is disposed in the second air inlet channel, and the first pressure sensor is electrically connected with the PLC.
In the foregoing filter rod pressure drop online detection device, preferably, the air outlet pressure detection device includes an air outlet end graphite block, an air outlet channel is arranged in the air outlet end graphite block, the air outlet channel and the second air inlet channel are coaxially arranged, a second pressure sensor is arranged in the air outlet channel, and the second pressure sensor is electrically connected with the PLC programmable controller.
In the foregoing filter rod pressure drop online detection device, preferably, the detection drum comprises a filter rod adsorption roller, an eccentric disc and a connecting pipe, wherein hollow rotating shafts are arranged at two ends of the filter rod adsorption roller, a plurality of filter rod accommodating grooves are formed in the peripheral wall of the filter rod adsorption roller at equal intervals along the circumferential direction, a plurality of adsorption holes are formed in the middle position of the bottom of each filter rod accommodating groove, each filter rod accommodating groove is provided with the connecting pipe at two ends, sealing baffles are arranged at two sides of the filter rod adsorption roller, one end of each connecting pipe penetrates through the sealing baffles and is fixedly connected with the eccentric disc, and a filter rod connecting seat is arranged at the other end of each connecting pipe.
In the above filter rod pressure drop on-line detection device, preferably, each connecting pipe is sleeved with a sealing ring, and the sealing ring is located between the sealing baffle and the eccentric disc.
Compared with the prior art, the invention can detect the pressure drop of all the produced filter sticks on line and remove filter sticks with unqualified pressure drop in time. The filter stick existence detection photoelectric switch is additionally arranged at the inlet of the detection drum and used for detecting whether filter sticks exist or not, a closed space is formed above the detection drum through the eccentric device, the sealing ring and the sealing cover, constant airflow of 17.5ml/s is introduced from one end of the filter stick, the pressure difference of the two ends of the filter stick is detected through the first pressure sensor and the second pressure sensor, the pressure drop of each filter stick passing through the detection device is detected one by one in production, the filter sticks with the pressure drop not conforming to a set range are effectively and accurately removed after being shifted on the discharge drum, statistics is carried out on the removed unqualified filter sticks, a statistics report is generated, uploading image-text display is carried out, an operation maintenance person is reminded, and accordingly, the unqualified filter sticks with the pressure drop are prevented from flowing into a next procedure.
Drawings
FIG. 1 is a schematic diagram of a system of the present invention;
FIG. 2 is a schematic structural view of a loading drum, a detection drum and a discharge drum;
FIG. 3 is a front view of the detection drum;
fig. 4 is a top cross-sectional view of an inlet end graphite block and an outlet end graphite block.
Reference numerals illustrate: the filter rod feeding device comprises a feeding drum 1, a detecting drum 2, a discharging drum 3, a filter rod existence detecting photoelectric switch 4, a sealing cover 5, an air inlet end graphite block 6, a main air inlet channel 7, a first air inlet channel 8, a second air inlet channel 9, a first pressure sensor 10, an air outlet end graphite block 11, an air outlet channel 13, a second pressure sensor 14, a filter rod adsorption roller 15, an eccentric disc 16, a connecting pipe 17, a hollow rotating shaft 18, a filter rod accommodating groove 19, an adsorption hole 20, a sealing baffle 21, a filter rod connecting seat 22, a sealing ring 23 and a PLC programmable controller 24.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Embodiments of the invention: an online detection method for pressure drop of a filter stick comprises the following steps:
step a, setting a closed space, wherein the closed space is specifically arranged on a detection drum wheel, and a first station and a second station are arranged in the closed space;
the arrangement of the closed space can ensure that the accuracy of detection data is ensured when the filter sticks are detected at the second station, and the outside pressure is ensured to be consistent when each filter stick is detected at the second station, so that detection errors are reduced.
B, when the filter stick enters the first station, introducing stable compressed air into the filter stick from one end of the first station, and enabling the compressed air to enter the closed space from the cylindrical surface of the filter stick so as to enable the interior of the closed space to reach a preset air pressure environment;
when the filter stick is at the first station, the filter stick can be ensured to be filled with air by introducing stable compressed air, so that when the filter stick enters the second station for detection, the condition of each filter stick before detection can be ensured to be the same, the detection error of the filter stick is effectively reduced, and in addition, when the filter stick is at the first station, the compressed air enters the closed space from the cylindrical surface of the filter stick, so that the preset air pressure environment is always maintained in the closed space.
Step c, the filter stick leaves the first station and enters the second station, stable compressed air is introduced into the filter stick from one end of the second station, the air pressure P1 at the end is detected, the compressed air passes through the filter stick and is discharged from the other end of the second station, and the air pressure P2 at the end is detected;
in the step, the pressure of the stable compressed air introduced into the second station is equal to that of the stable compressed air introduced into the first station, and the pressure in the closed space reaches the preset pressure, so that the compressed air does not enter the closed space through the cylindrical surface of the filter rod during the second station, but passes through the filter rod along the axial direction of the filter rod and enters the other end of the second station to be discharged;
step d, obtaining a pressure difference P3 by making a difference between P1 and P2, wherein the pressure difference P3 is the pressure drop of the filter rod, judging whether the filter rod is qualified according to the values of P1, P2 and P3, and conveying the qualified filter rod to the next working procedure, and removing the unqualified filter rod;
specifically, when P1 is smaller than a preset value or P2 is larger than a preset value, judging that the filter rod does not exist at the position, and if the filter rod existence detection device detects the filter rod and 10 continuous positions of P1 or P2 all judge that the filter rod does not exist, reporting red information of 'detecting the blockage of the filter rod of the drum'.
And a filter rod existence detection device is arranged at the feeding end, when the filter rod existence detection device does not detect the filter rod, and the values of the continuous 10 positions P1 or P2 are all within a preset value range, the automatic stop is carried out, and red information of 'detection failure of the air inlet end or the air outlet end' is reported.
In one particular method of on-line detection of filter rod pressure drop, preferably, the first and second stations are vented with 17.5ml/s of stable compressed air. It should be noted that the stable compressed air of 17.5ml/s is suitable for most filter sticks and pressure sensors, and the flow rate of the compressed air can be adjusted according to specific conditions for the filter sticks of special cigarettes. An automatic pressure regulating device is arranged on the air supply pipe, and the air flow rate can be changed by regulating the automatic pressure regulating device.
The filter rod pressure drop on-line detection device for realizing the filter rod pressure drop on-line detection method comprises a feeding drum 1, a detection drum 2 and a discharging drum 3, wherein the feeding drum 1 and the discharging drum 3 are positioned on two sides of the detection drum 2, an air inlet pressure detection device and an air outlet pressure detection device are arranged on two sides of the detection drum 2, a filter rod existence detection photoelectric switch 4 is arranged between the detection drum 2 and the feeding drum 1, a sealing cover 5 is arranged between the air inlet pressure detection device and the air outlet pressure detection device, and the air inlet pressure detection device, the air outlet pressure detection device and the filter rod existence detection photoelectric switch 4 are all electrically connected with a PLC (programmable logic controller) 24.
The air inlet pressure detection device, the air outlet pressure detection device, the filter stick existence detection photoelectric switch 4 and the sealing cover 5 are fixedly connected with a frame of the filter stick pressure drop on-line detection device by using connecting rods, the installation modes of the feeding drum 1, the detection drum 2 and the discharging drum 3 are all the prior art, only the core part of the filter stick pressure drop on-line detection device is shown in the figure, the rest parts which are not shown are all the structures of the prior art, the feeding drum 1, the discharging drum 3 and the PLC 24 are all the prior art, and can be directly purchased, so that the technical scheme of the invention is convenient to understand, and the structures of the feeding drum 1 and the discharging drum 3 which are commonly used are shown in fig. 2-4. The feeding drum 1 and the discharging drum 3 are not improved, and both adopt negative pressure adsorption type drums, and filter sticks are adsorbed by means of negative pressure adsorption, and the main improvement point of the invention is a detection drum 2, and the detection drum 2 is described in detail below.
Specifically, detect drum 2 includes filter rod adsorption roller 15, eccentric disk 16 and connecting pipe 17, the both ends of filter rod adsorption roller 15 have hollow pivot 18, a plurality of filter rod holding tank 19 have been seted up along equidistant in circumferencial direction on the periphery wall of filter rod adsorption roller 15, filter rod holding tank 19 is logical groove, the both ends of filter rod holding tank 19 run through in the both ends face of filter rod adsorption roller 15, a plurality of absorption holes 20 have all been seted up to the intermediate position of every filter rod holding tank 19 tank bottom, make the filter rod holding tank 19 form the negative pressure through absorption hole 20, thereby realize adsorbing the filter rod in filter rod holding tank 19, the both ends in every filter rod holding tank 19 all are provided with connecting pipe 17, the both sides of filter rod adsorption roller 15 are provided with sealing baffle 21, the one end of connecting pipe 17 runs through in sealing baffle 21 and eccentric disk 16 fixed connection, the through hole that equals with connecting pipe 17 quantity, connecting pipe 17 and corresponding through hole grafting and interference fit, the other end of connecting pipe 17 is provided with filter rod connecting seat 22.
The filter rod connecting bases 22 are of a rubber structure, please refer to fig. 3, the distance between the two eccentric discs 16 at the 6 o 'clock position is the largest, the distance between the two eccentric discs at the 12 o' clock position is the smallest, the eccentric discs 16 synchronously rotate along the hollow rotating shaft 18 during operation, and simultaneously can slide along the axial direction on the hollow rotating shaft 18, when one filter rod accommodating groove 19 is taken as an example during operation, two connecting pipes 17 in the filter rod accommodating groove 19 move into the sealing cover 5, the two filter rod connecting bases 22 are inserted into two ends of the filter rod, when the filter rod adsorbing roller 15 continues to rotate and leaves the sealing cover 5, the distance between the two connecting pipes 17 is gradually increased, when the filter rod accommodating groove 19 is at the 9 o 'clock position, the two filter rod connecting bases 22 are completely separated from two ends of the filter rod, if the filter rod needs to be removed, and when the filter rod accommodating groove 19 moves to the 8 o' clock position, the filter rod is blown out of the filter rod accommodating groove 19 through high-pressure gas.
In order to ensure that each filter rod is tested in a closed environment, a sealing ring 23 is preferably sleeved on each connecting pipe 17, and the sealing ring 23 is positioned between the sealing baffle 21 and the eccentric disc 16. When the filter rod accommodating groove 19 is positioned in the area covered by the sealing cover 5, the distance between the eccentric disc 16 and the support of the sealing baffle 21 is small, the eccentric disc and the support of the sealing baffle 21 clamp the sealing ring 23 at the moment, and the sealing ring 23 seals gaps around the connecting pipe 17 to prevent air leakage.
Further, the intake pressure detection device comprises an intake end graphite block 6, a main intake duct 7, a first branch intake duct 8 and a second branch intake duct 9 are arranged in the intake end graphite block 6, one end of the main intake duct 7 is connected with an air source, the other end of the main intake duct 7 is connected with one ends of the first branch intake duct 8 and the second branch intake duct 9, the other ends of the first branch intake duct 8 and the second branch intake duct 9 are connected with the detection drum 2, the first branch intake duct 8 is located on one side close to the feeding drum 1, and the second branch intake duct 9 is located on one side close to the discharging drum 3. A first pressure sensor 10 is arranged in the second air inlet channel 9, and the first pressure sensor 10 is electrically connected with a PLC (programmable logic controller) 24.
Further, the air outlet pressure detecting device comprises an air outlet end graphite block 11, an air outlet channel 13 is arranged in the air outlet end graphite block 11, the air outlet channel 13 and the second air inlet channel 9 are coaxially arranged, a second pressure sensor 14 is arranged in the air outlet channel 13, and the second pressure sensor 14 is electrically connected with the PLC 24.
The detection method is specifically described below by combining the filter rod pressure drop on-line detection device: the feeding drum 1 is used for feeding the detecting drum 2, please refer to fig. 1 and 2, the feeding drum 1 and the discharging drum 3 rotate clockwise, the detecting drum 2 rotates anticlockwise, each filter rod accommodating groove 19 on the detecting drum 2 is detected once when passing through the filter rod existence detecting photoelectric switch 4, the filter rod existence detecting photoelectric switch 4 sends a detection signal to the PLC programmable controller 24, and the PLC programmable controller 24 can know whether the filter rod accommodating groove 19 is provided with a filter rod or not and enter a shift register program.
When the filter rod is transferred onto the detection drum 2 from the feeding drum 1, the distance between the two ends of the filter rod and the filter rod connecting seats 22 on the two sides is larger, the distance between the two filter rod connecting seats 22 gradually decreases under the action of the eccentric disc 16 along with the anticlockwise rotation of the detection drum 2 until the filter rod is clamped, and when the filter rod enters the area covered by the sealing cover 5, the sealing ring 23 seals the connecting pipe 17 tightly under the extrusion of the eccentric disc 16 by the sealing baffle 21, so that air leakage is prevented, and a closed space for wrapping the filter rod is formed. When the filter stick moves to the first station, the first air inlet channel 8 is communicated with the connecting pipe 17 at one end, and stable compressed air of 17.5ml/s is conveyed to the filter stick, and at the moment, the air enters the closed space from the circumferential surface of the filter stick, and the preset air pressure is reached in the closed space. When the filter rod enters the second station, because the preset air pressure is reached in the closed space, only a small amount of air entering the filter rod from the second air inlet channel 9 enters the closed space from the circumferential surface of the filter rod, and most of the air enters the second station through the air outlet channel 13 to reach the second pressure sensor 14 after reaching the other end of the filter rod, at this time, the pressure value measured by the first pressure sensor 10 is P1, the values of the pressure values measured by the second pressure sensor 14 are P2, the values of the P1 and the P2 are transmitted to the PLC 24, the PLC 24 calculates P3 again, and the P3 is the pressure drop of the filter rod. Finally, P1, P2 and P3 are compared with standard values, whether the filter stick is qualified or not is judged, and if the filter stick is unqualified, when the filter stick enters the discharging drum 3 and passes through the rejecting station, the filter stick is blown off through high-pressure gas.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (10)

1. The filter rod pressure drop on-line detection method is characterized by comprising the following steps of:
step a, setting a closed space, and setting a first station and a second station in the closed space;
b, when the filter stick enters the first station, introducing stable compressed air into the filter stick from one end of the first station, and enabling the compressed air to enter the closed space from the cylindrical surface of the filter stick so as to enable the interior of the closed space to reach a preset air pressure environment;
step c, the filter stick leaves the first station and enters the second station, stable compressed air is introduced into the filter stick from one end of the second station, the air pressure P1 at the end is detected, the compressed air passes through the filter stick and is discharged from the other end of the second station, and the air pressure P2 at the end is detected;
and d, obtaining a pressure difference P3 by making a difference between the P1 and the P2, judging whether the filter stick is qualified according to the values of the P1, the P2 and the P3, and conveying the qualified filter stick to the next process, wherein the unqualified filter stick is removed.
2. The method for on-line detection of filter rod pressure drop according to claim 1, wherein: the first and second stations were vented with 17.5ml/s of stable compressed air.
3. The method for on-line detection of filter rod pressure drop according to claim 1, wherein: when P1, P2 and P3 are all within the preset value range, the filter stick is a qualified product;
and when P1 is smaller than a preset value or P2 is larger than the preset value, judging that no filter stick exists at the position, and if no filter stick exists at 10 continuous positions, reporting red information of 'detecting the blockage of the filter stick of the drum'.
4. The method for on-line detection of filter rod pressure drop according to claim 1, wherein: and a filter rod existence detection device is arranged at the feeding end, when the filter rod existence detection device does not detect the filter rod, and the values of the continuous 10 positions P1 or P2 are all within a preset value range, the automatic stop is carried out, and red information of 'detection failure of the air inlet end or the air outlet end' is reported.
5. A filter rod pressure drop on-line detection device for implementing the filter rod pressure drop on-line detection method as claimed in any one of claims 1 to 4, comprising a feeding drum (1), a detection drum (2) and a discharge drum (3), characterized in that: the feeding drum (1) and the discharging drum (3) are positioned on two sides of the detection drum (2), an air inlet pressure detection device and an air outlet pressure detection device are arranged on two sides of the detection drum (2), a filter rod existence detection photoelectric switch (4) is arranged between the detection drum (2) and the feeding drum (1), a sealing cover (5) is arranged between the air inlet pressure detection device and the air outlet pressure detection device, and the air inlet pressure detection device and the filter rod existence detection photoelectric switch (4) are electrically connected with a PLC (programmable logic controller) 24.
6. The filter rod pressure drop on-line detection device according to claim 5, wherein: the inlet air pressure detection device comprises an inlet air end graphite block (6), a main inlet air channel (7), a first branch inlet air channel (8) and a second branch inlet air channel (9) are arranged in the inlet air end graphite block (6), one end of the main inlet air channel (7) is connected with an air source, the other end of the main inlet air channel (7) is connected with the first branch inlet air channel (8) and one end of the second branch inlet air channel (9), the other ends of the first branch inlet air channel (8) and the second branch inlet air channel (9) are connected with the detection drum (2), the first branch inlet air channel (8) is located near one side of the feeding drum (1), and the second branch inlet air channel (9) is located near one side of the discharging drum (3).
7. The filter rod pressure drop on-line detection device according to claim 6, wherein: a first pressure sensor (10) is arranged in the second air inlet channel (9), and the first pressure sensor (10) is electrically connected with the PLC (24).
8. The filter rod pressure drop on-line detection device according to claim 7, wherein: the gas outlet pressure detection device comprises a gas outlet end graphite block (11), a gas outlet channel (13) is arranged in the gas outlet end graphite block (11), the gas outlet channel (13) and the second gas inlet channel (9) are coaxially arranged, a second pressure sensor (14) is arranged in the gas outlet channel (13), and the second pressure sensor (14) is electrically connected with the PLC (programmable logic controller) 24.
9. The filter rod pressure drop on-line detection device according to claim 8, wherein: the detection drum (2) comprises a filter rod adsorption roller (15), an eccentric disc (16) and a connecting pipe (17), wherein hollow rotating shafts (18) are arranged at two ends of the filter rod adsorption roller (15), a plurality of filter rod accommodating grooves (19) are formed in the peripheral wall of the filter rod adsorption roller (15) at equal intervals along the circumferential direction, a plurality of adsorption holes (20) are formed in the middle position of the groove bottom of the filter rod accommodating groove (19), two ends in the filter rod accommodating groove (19) are respectively provided with the connecting pipe (17), sealing baffle plates (21) are arranged at two sides of the filter rod adsorption roller (15), one end of each connecting pipe (17) penetrates through the sealing baffle plates (21) and are fixedly connected with the eccentric disc (16), and filter rod connecting seats (22) are arranged at the other ends of the connecting pipes (17).
10. The filter rod pressure drop on-line detection device according to claim 9, wherein: and each connecting pipe (17) is sleeved with a sealing ring (23), and the sealing rings (23) are positioned between the sealing baffle plate (21) and the eccentric disc (16).
CN202310408109.8A 2023-04-17 2023-04-17 Filter rod pressure drop on-line detection method and detection device Pending CN116441187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310408109.8A CN116441187A (en) 2023-04-17 2023-04-17 Filter rod pressure drop on-line detection method and detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310408109.8A CN116441187A (en) 2023-04-17 2023-04-17 Filter rod pressure drop on-line detection method and detection device

Publications (1)

Publication Number Publication Date
CN116441187A true CN116441187A (en) 2023-07-18

Family

ID=87135257

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310408109.8A Pending CN116441187A (en) 2023-04-17 2023-04-17 Filter rod pressure drop on-line detection method and detection device

Country Status (1)

Country Link
CN (1) CN116441187A (en)

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