Tobacco stem negative pressure conveying device

Abstract

The utility model relates to the technical field of cigarette manufacturing, in particular to a cigarette rod negative pressure conveying device. The negative pressure part is used for providing negative pressure for the tobacco claw to adsorb a tobacco stem, the tobacco claw is communicated with the negative pressure part through a negative pressure pipeline, and the negative pressure pipeline is provided with a switch valve used for controlling on-off of the negative pressure pipeline and adjusting the negative pressure; the filter is arranged between the tobacco claw and the switch valve and comprises a shell, an inner cavity of the shell comprises a filtering area and a cleaning area, and the filtering area is communicated with the negative pressure pipeline; the filter further comprises a plurality of filtering units arranged in the inner cavity of the shell and a control piece used for driving the filtering units to sequentially enter the filtering area and the cleaning area. In the application, the filter is additionally arranged on the negative pressure pipeline to remove the tobacco powder in the negative pressure pipeline, so that the negative pressure adsorption force is prevented from being influenced by the blockage of the negative pressure pipeline, the switch valve, the negative pressure part and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette manufacturing, in particular to a cigarette rod negative pressure conveying device. Background Art

[0002] During the cigarette-making process, tobacco is packaged into continuous rods by a rolling and forming machine. The rods are then cut into fixed-length double-length rods by a rotary cutter. These double-length rods are then fed into a filter-tipped machine via a spider-arm rod conveyor mechanism. After undergoing a series of processing steps, they are processed into finished cigarettes. The rod conveyor mechanism primarily uses negative pressure suction to grasp and convey the rods, and this suction force has specific requirements: the suction claws must reliably hold the cigarettes without damaging them. If the suction claws are too small, they will struggle to securely hold the cigarettes, causing smoke to fly. If the suction claws are too large, they can cause cigarette explosions, wrinkles on the surface, and other quality issues. The typical negative pressure suction vacuum pressure specification is -0.02MPa in shutdown mode and -0.035MPa in normal operation.

[0003] In order to accurately regulate the negative pressure adsorption force, the patent document with publication number CN109007961A discloses a cigarette conveying device and a cigarette making machine, wherein the cigarette conveying device includes: a negative pressure pipe for providing negative pressure to adsorb and convey cigarettes; a switch valve provided in the negative pressure pipe for controlling the on and off of the negative pressure pipe and adjusting the negative pressure in the negative pressure pipe; and a regulator for adjusting the switch and opening size of the switch valve, which can avoid the problem of unstable adjustment pressure caused by manual adjustment of the switch valve by different operators, and difficulty in maintaining consistent adsorption force on cigarettes.

[0004] However, when negative pressure is applied to the cigarette rod, cigarette dust in and near the cigarette rod may be sucked into the negative pressure pipe. The cigarette dust may not only block the negative pressure pipe and affect the size of the cross-sectional area of the negative pressure pipe, but may also enter the switch valve and negative pressure source and cause equipment damage. This may cause the negative pressure adsorption force to be unstable and affect the adsorption and transmission of the cigarette rod. Utility Model Content

[0005] The utility model aims to solve the above problems and provides a cigarette rod negative pressure transmission device with stable negative pressure adsorption force.

[0006] The technical solution to the problem solved by the utility model is to provide a cigarette rod negative pressure transmission device, including a cigarette claw and a negative pressure component for providing negative pressure to the cigarette claw to adsorb the cigarette rod, the cigarette claw and the negative pressure component are connected through a negative pressure pipe, and the negative pressure pipe is provided with a switch valve for controlling the on and off of the negative pressure pipe and adjusting the size of the negative pressure; the filter also includes a filter arranged between the cigarette claw and the switch valve, the filter includes a shell, the inner cavity of the shell includes a filter area and a cleaning area, the filter area is connected to the negative pressure pipe; the filter also includes a plurality of filter units arranged in the inner cavity of the shell, and a control component for driving the plurality of filter units to enter the filter area and the cleaning area in sequence.

[0007] As a preferred embodiment of the present invention, the length direction of the filter unit is parallel to the height direction of the shell, and the ends of several filter units in the non-length direction are connected in sequence to form an annular filter screen; the inner cavity of the shell is provided with a partition to divide the inner cavity into the filter area and the cleaning area, and the partition is provided with strip holes for the filter screen to pass through.

[0008] As a preferred embodiment of the present invention, the filter screen is annular, and the control component includes a first motor for driving the filter screen to rotate around its own central axis.

[0009] As a preferred embodiment of the present invention, the control component includes an active roller and a driven roller whose length directions are parallel to the length direction of the filter unit, and a second motor for driving the active roller to rotate; the filter mesh is sleeved on the active roller and the driven roller.

[0010] As a preferred embodiment of the present invention, the cleaning area is provided with a cleaning structure for cleaning impurities on the filter unit.

[0011] As a preference of the present invention, the cleaning structure includes a scraper that can abut against the filter unit.

[0012] As a preferred embodiment of the present invention, the cleaning structure includes an electrostatic dust removal component, which includes an electrode sheet arranged on the inner wall of the shell located in the cleaning area, and a power supply component for supplying and disconnecting power to the electrode sheet.

[0013] As a preferred embodiment of the present invention, the length of the electrode sheet along the height direction of the shell is not less than the length of the filter unit along the height direction of the shell.

[0014] As a preferred embodiment of the present invention, a dust box for collecting impurities is provided at the bottom of the cleaning area.

[0015] As a preferred embodiment of the present invention, it further includes a negative pressure sensor for detecting the negative pressure value in the negative pressure pipes before and after the filter.

[0016] Beneficial effects of the utility model:

[0017] 1. In this application, a filter is added to the negative pressure pipe to remove smoke particles from the pipe, preventing blockage of the pipe, on-off valve, and negative pressure components, which could affect the negative pressure adsorption capacity. The filter comprises a continuously updated filter unit as the filtration portion. The filtration area remains clean and its mesh area remains unchanged from the previous filtration. This ensures a stable airflow area, thereby maintaining a stable negative pressure adsorption capacity.

[0018] 2. In some embodiments, the filter unit is cleaned and then sent to the filter area for use, which reduces the cost of the filter and avoids the filter unit itself being blocked by smoke residue and affecting the negative pressure adsorption capacity.

[0019] 3. In some embodiments, the negative pressure values before and after the filter are monitored by a negative pressure sensor. When there is a difference between the negative pressure values before and after, it indicates that the filter unit is clogged, and the operator can stop the machine in time for processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of a cigarette rod negative pressure transmission device;

[0021] Figure 2 It is a top view of one embodiment of a filter in a cigarette rod negative pressure transmission device;

[0022] Figure 3 This is a front view of an embodiment of a filter in a cigarette rod negative pressure transmission device;

[0023] In the figure: negative pressure pipe 1, switch valve 2, filter 3, shell 31, filter area 311, cleaning area 312, partition 313, filter mesh 32, filter unit 321, scraper 341, electrode sheet 342a, power supply 342b, negative pressure sensor 4. DETAILED DESCRIPTION

[0024] The following are specific implementations of the present invention, and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0025] A cigarette rod negative pressure transmission device, such as Figure 1 As shown, it includes a negative pressure pipe 1, one end of the negative pressure pipe 1 ( Figure 1 The A end shown in the figure) is connected to the negative pressure adsorption hole of the cigarette claw, and the other end ( Figure 1The H end shown in FIG is connected to a negative pressure element capable of providing negative pressure. The negative pressure element is not limited and can be, for example, a vortex suction fan. When the negative pressure element provides negative pressure, the negative pressure suction holes of the cigarette claw can negatively absorb the cigarette rod through the connection of the negative pressure pipe 1, thereby grasping the cigarette rod. When the negative pressure element stops providing negative pressure or the negative pressure pipe 1 is closed, the negative pressure suction holes of the cigarette claw can no longer grasp the cigarette rod, and the cigarette rod falls from the cigarette claw, thereby releasing the cigarette rod. In this way, the cigarette rod is transferred.

[0026] In cigarette manufacturing equipment, negative pressure components typically provide negative pressure not only for transporting cigarette rods but also for other devices, such as dust removal during cigarette shaping. Therefore, to facilitate independent control of the on / off state of the negative pressure conduit 1 in this transport device and to adjust the negative pressure adsorption force, an on / off valve 2 is provided on the negative pressure conduit 1. The choice of on / off valve 2 is not limited; for example, it can be a ball valve, which can be opened or closed by rotating its valve core. Adjusting the valve core's rotation angle controls the valve opening, thereby controlling the cross-sectional area of the negative pressure conduit 1 and, consequently, the negative pressure adsorption force.

[0027] In some embodiments, in order to further accurately control the opening of the switch valve 2 to accurately control the magnitude of the negative pressure adsorption force, as shown in FIG. Figure 1 As shown, an AT pneumatic actuator switch valve, an AT pneumatic actuator reversing solenoid valve for automatically controlling the on-off of the negative pressure pipe 1 when the equipment is started and stopped, and an AT pneumatic actuator switch regulator for setting the opening size of the AT pneumatic actuator switch valve are also provided between the ball valve switch valve 2 and the cigarette claw. These structures are all existing technologies and will not be described in detail here.

[0028] Since the object of negative pressure transmission is the cigarette rod, there are inevitably small impurities such as cigarette dust near the cigarette rod. These impurities can easily be adsorbed into the negative pressure pipe 1 through the negative pressure adsorption holes of the cigarette claws, which may not only block the negative pressure pipe, but also enter the switch valve 2 and the negative pressure component to cause equipment damage. This may cause the negative pressure adsorption force to be unstable and affect the adsorption transmission of the cigarette rod. Therefore, if Figure 1 As shown, a filter 3 is provided between the cigarette claw and the switch valve 2 .

[0029] The structure of the traditional filter 3 is: a filter screen is set up, the airflow passes through the mesh, and impurities are trapped on the filter screen. However, in a negative pressure transmission device, if the filter 3 traps impurities and is not removed in time, the mesh of the filter screen will become smaller and smaller, and the area of the filter 3 that allows airflow to pass through will become smaller and smaller. The airflow needs to overcome greater friction resistance and shape resistance when passing through, which may lead to a decrease in the efficiency of the negative pressure system, thereby affecting the negative pressure adsorption force. Therefore, in this application, the filter 3 has been further designed.

[0030] First, the filter 3 includes a housing 31, and the inner cavity of the housing 31 includes a filtering area 311 and a cleaning area 312. In this embodiment, specifically: Figure 2 and Figure 3 As shown, the shell 31 is cylindrical, with a fixed shaft at the center. A number of vertical slots are evenly arranged on the fixed shaft and the inner wall of the shell 31. Two partitions 313 are inserted into the vertical slot of the fixed shaft at one end and the vertical slot of the shell 31 at the other end until the partitions 313 abut against the bottom of the shell 31. Figure 2 In the direction of the filter, the smaller fan-shaped area between the lower surface of the upper partition 313 and the upper surface of the lower partition 313 forms the filtering area 311, and the remaining area in the shell 31, that is, the larger fan-shaped area between the upper surface of the upper partition 313 and the lower surface of the lower partition 313 forms the cleaning area 312.

[0031] The filter area 311 is connected to the negative pressure pipe 1. Specifically, in this embodiment: Figure 3 As shown, an inlet is opened on the side wall of the shell 31 located in the filter area 311, and an outlet is opened on the bottom of the shell 31 located in the filter area 311. Then, one end of the first connecting pipe is connected to the cigarette claw and the other end is connected to the inlet. Then, one end of the second connecting pipe is connected to the outlet and the other end is connected to the negative pressure member. A switch valve 2 is set on the second connecting pipe. The first connecting pipe and the second connecting pipe form a negative pressure pipeline 1, and the filter area 311 is also connected to the negative pressure pipeline 1.

[0032] The filter 3 also includes a plurality of filter units 321 disposed in the inner cavity of the housing 31, and a control component for driving the plurality of filter units 321 to sequentially enter the filter area 311 and the cleaning area 312. When a filter unit 321 is located in the filter area 311, airflow enters from the inlet on the side wall of the housing 31, passes through the filter unit 321 to intercept impurities, and is then discharged from the outlet at the bottom of the housing 31. To ensure that the airflow can pass through the filter unit 321, the length of the air pipe at the inlet can be lengthened so that the end of the air pipe abuts against the filter unit 321. The mesh area of the filter unit 321 that intercepts impurities will become smaller, affecting the negative pressure adsorption force. At this time, the control component can be used to send this part of the filter unit 321 into the cleaning area, and a new filter unit 321 can be sent into the filter area 311.

[0033] This continuously updated filter unit 321 can be constructed in a variety of ways, such as by winding one end of the filter screen around a reel and the other end around a reel, with the reel positioned in the cleaning area 312. The portion of the filter screen stretched between the reel and the reel is positioned in the filtering area 311 as the filter unit 321. After this portion of the filter unit 321 has trapped impurities, the reel is reeled in and stored in the cleaning area 312. A new portion of the filter screen is then unwound into the filtering area 311 as a new filter unit 321.

[0034] Alternatively, as in this embodiment, in order to reduce costs, the filter unit 321 that has trapped impurities can be cleaned and then sent back to the filter area 311 for use. Figure 2 and Figure 3 As shown, an annular filter screen 32 is prepared. A fixed cover is provided at the center of the filter screen 32. The fixed cover is fixedly connected to the upper end of the filter screen 32 via a plurality of connecting rods. The fixed cover is then rotatably connected to the fixed shaft via a rotating bearing. Meanwhile, a slit is provided in the partition 313 for the filter screen 32 to pass through. At this point, the portion of the filter screen 32 located in the filter area 311 forms a filter unit 321. By rotating the filter screen 32, the filter unit 321 can be moved from the filter area 311 into the cleaning area 312, and the portion of the filter screen 32 previously located in the cleaning area 312 can also be moved into the filter area 311 to form a new filter unit 321. To control the rotation of the filter screen 32, a control element includes a first motor connected to the fixed cover or via a reducer. Driven by the first motor, the fixed cover rotates on the fixed shaft and drives the filter screen 32 to rotate via the connecting rods.

[0035] In other embodiments, the control unit includes a driving roller and a driven roller, both of which are parallel to the length of the filter unit 321, and a second motor for driving the driving roller. The filter screen 32 is mounted on the driving roller and the driven roller. Like a conveyor belt, the driving roller and the driven roller drive the filter screen 32 to rotate.

[0036] Under the above structure, by providing a cleaning structure in the cleaning area 312 that can effectively clean the filter 32, the cleanliness of the filter unit 321 entering the filter area 311 can be ensured, so that it has a stable mesh area.

[0037] The cleaning structure is not limited. In this embodiment, Figure 2 As shown, the cleaning structure includes a scraper 341 that can abut against the filter unit 321. The axial length of the scraper 341 is not less than the axial length of the filter screen 32, so as to scrape the filter screen 32 in all directions. At least two scrapers 341 are provided to improve the cleaning effect.

[0038] Furthermore, in this embodiment, an electrostatic dust removal component is also provided in the area between the two scrapers 341, such as Figure 2 As shown, the electrostatic dust removal assembly includes an electrode sheet 342a provided on the inner wall of the housing 31 located in the cleaning area 312, and a power supply 342b for supplying and disconnecting power to the electrode sheet 342a. The operating principle is as follows: the power supply 342b supplies power to the electrode sheet 342a through a wire, so that the electrode sheet 342a is charged. When the filter unit 321 approaches the electrode sheet 342a, impurities are adsorbed; when the power is removed from the electrode sheet 342a so that it is not charged, the impurities can fall off the electrode sheet 342a. Figure 3 As shown, the length of the electrode sheet 342a along the height direction of the shell 31 is not less than the length of the filter unit 321 along the height direction of the shell 31 to ensure all-round adsorption and cleaning of the filter unit 321.

[0039] At the same time, a dust box for collecting impurities is provided at the bottom of the cleaning area 312. A sticky adsorbent is preferably provided in the dust box to bind and fix impurities and prevent dust from flying. Furthermore, a cleaning port and a cover that can cover the cleaning port are provided at the bottom of the housing 31 in the cleaning area 312 to facilitate cleaning of the dust box.

[0040] In some embodiments, in order to further ensure the stability of negative pressure adsorption, the cigarette rod negative pressure transmission device also includes a negative pressure sensor 4 for detecting the negative pressure value in the negative pressure pipe 1 before and after the filter 3. When there is a difference between the front and rear negative pressure values, it indicates that the filter unit 321 is blocked, and the operator can stop the machine in time for processing.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A cigarette rod negative pressure transmission device, comprising a cigarette claw, a negative pressure member for providing negative pressure to the cigarette claw to adsorb the cigarette rod, the cigarette claw and the negative pressure member being connected via a negative pressure pipe (1), the negative pressure pipe (1) being provided with a switch valve (2) for controlling the on / off of the negative pressure pipe (1) and adjusting the magnitude of the negative pressure; Its characteristics are: It also includes a filter (3) disposed between the cigarette claw and the switch valve (2), the filter (3) including a housing (31), the inner cavity of the housing (31) including a filter area (311) and a cleaning area (312), the filter area (311) being in communication with the negative pressure pipe (1); The filter (3) further comprises a plurality of filter units (321) arranged in the inner cavity of the housing (31), and a control component for driving the plurality of filter units (321) to sequentially enter the filter area (311) and the cleaning area (312).

2. The cigarette rod negative pressure transmission device according to claim 1, characterized in that: The length direction of the filter unit (321) is parallel to the height direction of the housing (31), and the ends of several filter units (321) in the non-length direction are connected in sequence to form an annular filter net (32); The inner cavity of the shell (31) is provided with a partition (313) to divide the inner cavity into the filtering area (311) and the cleaning area (312), and the partition (313) is provided with strip holes for the filter screen (32) to pass through.

3. The cigarette rod negative pressure transmission device according to claim 2, characterized in that: The filter (32) is annular, and the control component comprises a first motor for driving the filter (32) to rotate around its own central axis.

4. The cigarette rod negative pressure transmission device according to claim 2, characterized in that: The control component comprises an active roller and a driven roller, both of which have length directions parallel to the length direction of the filter unit (321), and a second motor for driving the active roller to rotate; the filter screen (32) is sleeved on the active roller and the driven roller.

5. The cigarette rod negative pressure transmission device according to claim 2, characterized in that: The cleaning area (312) is provided with a cleaning structure for cleaning impurities on the filter unit (321).

6. The cigarette rod negative pressure transmission device according to claim 5, characterized in that: The cleaning structure comprises a scraper (341) capable of abutting against the filter unit (321).

7. The cigarette rod negative pressure transmission device according to claim 5, characterized in that: The cleaning structure comprises an electrostatic dust removal component, which comprises an electrode sheet (342a) arranged on the inner wall of a shell (31) located in the cleaning area (312), and a power supply component (342b) for supplying and disconnecting power to the electrode sheet (342a).

8. The cigarette rod negative pressure transmission device according to claim 7, characterized in that: The length of the electrode sheet (342a) along the height direction of the housing (31) is not less than the length of the filter unit (321) along the height direction of the housing (31).

9. The cigarette rod negative pressure transmission device according to claim 5, characterized in that: A dust collection box for collecting impurities is provided at the bottom of the cleaning area (312).

10. The cigarette rod negative pressure conveying device according to claim 1, characterized in that: It also includes a negative pressure sensor (4) for detecting the negative pressure value in the negative pressure pipe (1) before and after the filter (3).

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