Prismatic rail negative pressure control conveying and guiding device of filter stick forming unit

Abstract

The invention provides a prismatic rail negative pressure control conveying guide device of a filter stick forming unit, which comprises a machine body, a prismatic rail guide assembly and a negative pressure assembly, and the prismatic rail guide assembly and the negative pressure assembly are both arranged on the machine body; the prismatic rail guide assembly comprises a prismatic rail bottom plate, a prismatic rail side plate and a cover plate, the prismatic rail side plate is arranged on the prismatic rail bottom plate, the cover plate is arranged on the side wall of the prismatic rail side plate, a gap exists between the cover plate and the prismatic rail bottom plate, and the filter sticks are guided and conveyed from the gap between the cover plate and the prismatic rail bottom plate. The negative pressure is adopted to restrain and guide the filter stick, the brush replacement work of each device three times a week is omitted, the brush cost can be saved by about 50,000 yuan every year, meanwhile, about 33 working hours are increased every year, and on the basis that materials are saved, the operation efficiency of the device is improved, and the quality risk of products is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of filter rod forming machine related equipment in cigarette production in the tobacco industry, and in particular to a prismatic rail negative pressure control conveying guide device for a filter rod forming unit. Background Art

[0002] The KDF2 filter rod forming unit is a filter rod forming device commonly used in the tobacco industry and is the mainstream model for producing filter rods. Among them, the YL22 filter rod forming machine in the KDF2 filter rod forming unit is a key equipment for completing the process of rolling acetate fiber tow into rods, wrapping them with forming paper, cutting them into filter rods of a certain length, and transferring them to trays through the tobacco separator wheel. In the forming part of the YL22, before the filter rods cut by the knife disc enter the tobacco separator wheel, there is a prismatic track channel, which is composed of a brush plate with bristles and a prismatic track with positive pressure jet holes. The channel is used to guide and remove the filter rods ( Figure 1-Figure 3 The guiding function is to guide and ensure the conveying of filter rods, and the rejecting function is to reject unqualified filter rods through positive pressure gas when the equipment is started or in abnormal state.

[0003] The prismatic rail channel in the prior art has the following problems:

[0004] 1. Wear of bristles: When the filter rod is removed, the bristles must be pushed away first, and the bristles must be bent to a certain degree before the unqualified filter rod can be discharged horizontally. The bristles are deformed and worn, which reduces the restraining and guiding ability of the brush and affects the normal operation of the equipment.

[0005] 2. Difficulty in adjusting the base: Because the bristles are in contact with the high-speed moving filter rod for a long time, there is wear and deformation, and frequent inspection, adjustment and regular replacement are required, resulting in a long equipment maintenance time and affecting the equipment operation efficiency.

[0006] In order to solve the above-mentioned problems, the prior art has improved the material of the cover plate with publication number CN201620720321.3 “A prismatic rail conveying guide device for a KDF2 filter rod forming machine”; the shape and installation method of the cover plate have been improved with publication number CN201320839658.2 “A filter rod guiding and rejecting mechanism with an improved structure of a filter rod forming machine”; the brush has been improved with publication number CN201520098358.2 “A filter rod rejecting guide device for a filter rod forming machine”.

[0007] Although the above improvements have reduced the wear problem of the cover plate to a certain extent, they have higher requirements on the manufacturing accuracy and adjustment accuracy of the cover plate, and have higher requirements on the maintenance personnel. When the brush on the cover plate is worn, it still needs to be adjusted, which takes up more working hours. Summary of the invention

[0008] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a prismatic rail negative pressure controlled conveying guide device for a filter rod forming unit, which solves the problem of easy wear of the brush by improving the cover plate and the conveying channel, ensures high-speed and stable conveying of the filter rods, reduces equipment adjustment time, and improves the operating efficiency of the equipment.

[0009] To achieve the above-mentioned purpose and other related purposes, the present invention provides a prismatic rail negative pressure controlled conveying guide device for a filter rod forming unit, comprising a machine body, a prismatic rail guide assembly, and a negative pressure assembly, wherein the prismatic rail guide assembly and the negative pressure assembly are both arranged on the machine body; the prismatic rail guide assembly comprises a prismatic rail bottom plate, a prismatic rail side plate, and a cover plate, wherein the prismatic rail side plate is arranged on the prismatic rail bottom plate, and the cover plate is arranged on the side wall of the prismatic rail side plate, and there is a gap between the cover plate and the prismatic rail bottom plate, and the filter rod is guided and conveyed through the gap between the cover plate and the prismatic rail bottom plate; a plurality of negative pressure air suction holes are provided on the prismatic rail bottom plate, and the negative pressure assembly is connected to the negative pressure air suction holes, so that the negative pressure air suction holes generate negative pressure to constrain the filter rod.

[0010] Preferably, the negative pressure component includes a negative pressure air chamber, a connecting air pipe, and a negative pressure source, the negative pressure air chamber is arranged on the bottom surface of the prismatic rail bottom plate, and the negative pressure air chamber and the prismatic rail bottom plate are kept airtight; the negative pressure source is arranged in the machine body, and the negative pressure source is connected to the negative pressure air chamber through the connecting air pipe.

[0011] Preferably, the negative pressure component further includes a negative pressure chamber, which is disposed on the machine body, and the negative pressure source is connected to the connecting air pipe through the negative pressure chamber.

[0012] Preferably, the negative pressure air chamber includes an air chamber shell, an air chamber inner cavity, and a shell connecting plate, the air chamber inner cavity is arranged in the air chamber shell, and the air chamber inner cavity is connected with the negative pressure suction hole and the connecting air pipe; the shell connecting plate is arranged on the air chamber shell; a shell connecting hole is opened on the shell connecting plate, a prismatic rail threaded rod is arranged on the prismatic rail bottom plate, the prismatic rail threaded rod is passed through the shell connecting hole and is fastened by a nut; the negative pressure air chamber is connected to the prismatic rail guide assembly through the shell connecting hole, the prismatic rail threaded rod, and the nut.

[0013] Preferably, a plurality of prismatic rail side plate connecting holes are provided on the side surface of the prismatic rail side plate, a plurality of cover plate connecting holes are provided on the side surface of the cover plate, the prismatic rail side plate connecting holes and the cover plate connecting holes are aligned, and screws are passed through both.

[0014] Preferably, it also includes a positive pressure rejection component, which includes a positive pressure air source, a positive pressure air duct, and a positive pressure air outlet. The positive pressure air source is arranged in the machine body, and the positive pressure air outlet is opened on the prismatic rail side plate. The positive pressure air source and the positive pressure air outlet are connected through the positive pressure air duct.

[0015] Preferably, a solenoid valve is provided on the positive pressure airway, and the solenoid valve is used to control the on and off of the positive pressure airway.

[0016] Preferably, the positive pressure rejection assembly further comprises a guide bar, which is arranged on a side of the prismatic rail bottom plate away from the prismatic rail side plate and is used to guide the filter rod when the positive pressure air outlet hole rejects the filter rod.

[0017] Preferably, a plurality of machine body connecting holes are formed on the side wall of the prismatic rail side plate away from the cover plate, connecting pieces are arranged in the machine body connecting holes, and the prismatic rail guide assembly is arranged on the machine body through the machine body connecting holes and the connecting pieces.

[0018] Preferably, one end of the cover plate is provided with an inclination for guiding the filter rod to enter between the cover plate and the prismatic rail bottom plate.

[0019] As described above, the filter rod forming unit prismatic rail negative pressure control conveying guide device according to the present invention has the following beneficial effects:

[0020] 1. The filter rod forming unit prismatic rail negative pressure control conveying guide device of the present invention is provided with a negative pressure component, and a plurality of negative pressure air suction holes are opened on the prismatic rail guide component, and the negative pressure component is connected with the negative pressure air suction holes. When the filter rod moves in the prismatic rail guide component, the filter rod is constrained and guided by the adsorption force generated by the negative pressure component and the negative pressure air suction holes. Compared with the scheme of using a brush in the prior art, the cost is reduced and the production efficiency is improved.

[0021] 2. The present invention uses negative pressure to constrain and guide the filter rod, eliminating the brush replacement work of each device three times a week, which can save about 50,000 yuan in brush costs each year. At the same time, it also increases about 33 working hours each year. On the basis of achieving material savings, it improves the operating efficiency of the equipment and reduces product quality risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1-Figure 3 It is a structural schematic diagram of a prismatic rail channel in the prior art of the present invention;

[0023] Figure 4 It is a spatial schematic diagram of the negative pressure control conveying guide device of the prismatic rail of the filter rod forming unit according to the present invention;

[0024] Figure 5 It is a disassembled diagram of some parts of the prismatic rail negative pressure control conveying guide device of the filter rod forming unit according to the present invention;

[0025] Figure 6 It is a schematic diagram of the connection between the prismatic rail bottom plate and the prismatic rail side plates of the prismatic rail negative pressure control conveying guide device of the filter rod forming unit according to the present invention;

[0026] Figure 7 It is a spatial schematic diagram of the negative pressure air chamber of the prismatic rail negative pressure control conveying guide device of the filter rod forming unit according to the present invention;

[0027] Figure 8 It is a spatial schematic diagram of a cover plate of a negative pressure control conveying guide device for a prismatic rail of a filter rod forming unit according to the present invention;

[0028] Fig. 9 This is a simplified model diagram for the design of the negative pressure air suction hole diameter in the present invention.

[0029] Description of reference numerals:

[0030] 1. Machine body; 2. Prismatic rail guide assembly; 201. Prismatic rail bottom plate; 2011. Negative pressure air suction hole; 2012. Guide strip; 2013. First prismatic rail threaded rod; 2014. Second prismatic rail threaded rod; 202. Prismatic rail side plate; 2021. Prismatic rail side plate connecting hole; 2022. Positive pressure air outlet hole; 203. Cover plate; 2031. Cover plate connecting hole; 3. Positive pressure air duct; 4. Negative pressure bin; 5. Connecting air duct; 6. Negative pressure air chamber; 601. Air chamber shell; 602. Air chamber inner cavity; 603. First shell connecting plate; 6031. First shell connecting hole; 604. Second shell connecting plate; 6041. Second shell connecting hole; 7. Connector; 8. Nut; 9. Screw; 10. Bell mouth; 11. Bell mouth drive assembly. DETAILED DESCRIPTION

[0031] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0033] The present invention provides a filter rod forming unit prismatic rail negative pressure control conveying guide device. For the convenience of description, the length direction of the body 1 is defined as the left-right direction, the width direction of the body 1 is the front-back direction, and the height direction of the body 1 is the up-down direction. Figure 4 A spatial rectangular coordinate system is established in the figure, where the positive and negative directions of the X-axis are the front direction and the back direction, the positive and negative directions of the Y-axis are the left direction and the right direction, and the positive and negative directions of the Z-axis are the up direction and the down direction.

[0034] like Figure 4-Figure 8 As shown, the present invention provides a prismatic rail negative pressure controlled conveying guide device for a filter rod forming unit (hereinafter referred to as the conveying guide device), comprising a machine body 1, a prismatic rail guide assembly 2, and a negative pressure assembly, wherein the prismatic rail guide assembly 2 and the negative pressure assembly are both arranged on the machine body 1; the prismatic rail guide assembly 2 comprises a prismatic rail bottom plate 201, a prismatic rail side plate 202, and a cover plate 203, wherein the prismatic rail side plate 202 is arranged on the rear edge of the prismatic rail bottom plate 201, and the cover plate 203 is arranged on the front side wall of the prismatic rail side plate 202, and there is a gap between the bottom surface of the cover plate 203 and the top surface of the prismatic rail bottom plate 201, and the filter rod is guided and conveyed through the gap between the cover plate 203 and the prismatic rail bottom plate 201; a plurality of negative pressure air suction holes 2011 are provided on the prismatic rail bottom plate 201, and the negative pressure assembly is connected with the negative pressure air suction holes 2011, so that the negative pressure air suction holes 2011 generate negative pressure to constrain the filter rod.

[0035] The filter rod forming unit prismatic rail negative pressure controlled conveying guide device of the present invention is provided with a negative pressure component and a prismatic rail guide component 2. A negative pressure air suction hole 2011 is provided on the prismatic rail guide component 2. The negative pressure component and the negative pressure air suction hole 2011 are connected. When the filter rod moves on the prismatic rail guide component 2, the negative pressure component applies guiding constraints to the filter rod through the negative pressure air suction holes 2011, thereby solving the deformation and wear problems that are easy to occur when a brush is used for guiding and restraining in the prior art, thereby reducing costs and improving production efficiency.

[0036] Preferably, Figure 4 , Figure 5 As shown, the negative pressure component includes a negative pressure air chamber 6, a connecting air pipe 5, and a negative pressure source (the negative pressure source is not shown). The negative pressure air chamber 6 is arranged on the bottom surface of the prismatic rail bottom plate 201, and the negative pressure air chamber 6 and the prismatic rail bottom plate 201 are kept airtight; the negative pressure source is arranged in the body 1, and the negative pressure source is connected to the negative pressure air chamber 6 through the connecting air pipe 5.

[0037] Preferably, Figure 4 , Figure 5 As shown, the negative pressure assembly further includes a negative pressure chamber 4, which is disposed on the machine body 1, and the negative pressure source is connected to the connecting air pipe 5 through the negative pressure chamber 4. In this embodiment, the purpose of providing the negative pressure chamber 4 is to ensure the stability of the gas in the negative pressure chamber 6. The negative pressure source adopts a vacuum pump.

[0038] Further, in other embodiments, the negative pressure source can be directly connected to the negative pressure air suction hole 2011 through the connecting air pipe 5. In this embodiment, the negative pressure bin 4 and the negative pressure air chamber 6 are used to ensure the stability of the negative pressure air source.

[0039] Preferably, Figure 5-Figure 7 As shown, the negative pressure air chamber 6 includes an air chamber shell 601, an air chamber inner cavity 602, and a shell connecting plate. The air chamber inner cavity 602 is arranged in the air chamber shell 601, and the air chamber inner cavity 602 is connected with the negative pressure suction hole 2011 and the connecting air pipe 5; the shell connecting plate is arranged on the air chamber shell 601; a shell connecting hole is opened on the shell connecting plate in the vertical direction, and a prismatic rail threaded rod is arranged on the bottom surface of the prismatic rail bottom plate 201 in the vertical direction. The prismatic rail threaded rod is passed through the shell connecting hole and is fastened by a nut 8; the negative pressure air chamber 6 is connected to the prismatic rail guide assembly 2 through the shell connecting hole, the prismatic rail threaded rod, and the nut 8.

[0040] In this embodiment, if Figure 6 , Figure 7 As shown, the cross-sectional shape of the negative pressure air chamber 6 is a cone that is larger at the top and smaller at the bottom, and the inner cavity 602 of the air chamber completely covers a plurality of negative pressure suction holes 2011 . There are two shell connecting plates, namely, a first shell connecting plate 603 and a second shell connecting plate 604. The first shell connecting plate 603 is arranged on the left side wall of the air chamber shell 601, and the second shell connecting plate 604 is arranged on the right side wall of the air chamber shell 601; a first shell connecting hole 6031 is opened on the first shell connecting plate 603, and a second shell connecting hole 6041 is opened on the second shell connecting plate 604; accordingly, there are two prismatic rail threaded rods, namely, a first prismatic rail threaded rod 2013 and a second prismatic rail threaded rod 2014. The first prismatic rail threaded rod 2013 is passed through the first shell connecting hole 6031 and is fastened by a nut 8; the second prismatic rail threaded rod 2014 is passed through the second shell connecting hole 6041 and is fastened by a nut 8, so that the negative pressure air chamber 6 is installed on the bottom surface of the prismatic rail bottom plate 201.

[0041] Furthermore, in order to ensure the airtightness between the negative pressure air chamber 6 and the prismatic rail bottom plate 201, a sealing gasket can be placed between the air chamber shell 601 and the prismatic rail bottom plate 201, thereby ensuring the airtightness of the air chamber inner cavity 602 and the negative pressure suction hole 2011.

[0042] Preferably, Figure 5 , Figure 6 , Figure 8As shown, a plurality of prismatic rail side plate connection holes 2021 are formed on the front side of the prismatic rail side plate 202 in the front-to-back direction, and a plurality of cover plate connection holes 2031 are formed on the rear side of the cover plate 203. The prismatic rail side plate connection holes 2021 and the cover plate connection holes 2031 are aligned, and screws 9 are passed through the two. In this embodiment, the number of the prismatic rail side plate connection holes 2021 and the cover plate connection holes 2031 are both two; in other embodiments, the number of the prismatic rail side plate connection holes 2021 and the cover plate connection holes 2031 may also be other numbers.

[0043] Preferably, Figure 4 , Figure 6 As shown, in this embodiment, the guide device further includes a positive pressure rejection assembly, which includes a positive pressure air source (the positive pressure air source is not shown), a positive pressure air guide pipe 3, and a positive pressure air outlet 2022. The positive pressure air source is arranged in the machine body 1, and the positive pressure air outlet 2022 is arranged on the front side of the prismatic rail side plate 202 through the front and rear directions. The positive pressure air source and the positive pressure air outlet 2022 are connected through the positive pressure air guide pipe 3. The positive pressure air source can be compressed gas.

[0044] Furthermore, in the present embodiment, a solenoid valve is also provided on the positive-pressure airway tube 3 , and the solenoid valve is used to control the on-off of the positive-pressure airway tube 3 .

[0045] Preferably, Figure 6 As shown, the positive pressure rejection assembly also includes a guide bar 2012, which is arranged at the front edge of the prism rail bottom plate 201, and is used to guide the filter rod when the positive pressure air outlet 2022 rejects the filter rod. In this embodiment, the guide bar 2012 is made of solid metal, and the guide bar 2012 is provided with an arc inclined upward along the front-to-back direction, so that when the positive pressure air outlet 2022 performs air blowing rejection, the rejection of the filter rod can be guided to ensure the effect of the filter rod rejection. The gap between the cover plate 203 and the prism rail bottom plate 201 forms a channel with an inner diameter of 7.9-8mm, which is larger than the diameter of the filter rod, so that when the positive pressure air outlet 2022 performs air blowing rejection, it can ensure that the filter rod is blown out of the channel.

[0046] Preferably, Figure 4 , Figure 5 As shown, a plurality of machine body connection holes are provided on the rear side wall of the prism rail side plate 202, and a connection piece 7 is provided in the machine body connection hole, and the prism rail guide assembly 2 is provided on the machine body 1 through the machine body connection hole and the connection piece 7. In this embodiment, the number of the machine body connection holes is two, and the number of the connection pieces 7 is two; in other embodiments, the number of the machine body connection holes may also be multiple, depending on the on-site installation conditions.

[0047] Preferably, Figure 5 , Figure 8As shown, the right end of the cover plate 203 is provided with an inclination for guiding the filter rod to enter between the cover plate 203 and the prismatic rail bottom plate 201. In this embodiment, the bottom surface of the right end of the cover plate 203 is provided with an inclination extending obliquely downward from right to left to guide the filter rod.

[0048] Preferably, Figure 4 , Figure 5 As shown, in the present application, the right side of the prism rail guide assembly 2 is provided with a bell mouth 10, a cutter disc, and a bell mouth drive assembly 11, the bell mouth drive assembly 11 is connected to the bell mouth 10 by transmission, and the bell mouth 10 cooperates with the cutter disc to cut the filter rod. The left side of the prism rail guide assembly 2 is provided with a double acceleration wheel, and the double acceleration wheel accelerates the conveying of the filter rod. The bell mouth 10, the cutter disc, the bell mouth drive assembly 11, and the double acceleration wheel are all prior art, and will not be repeated here.

[0049] The present invention relates to a filter rod forming unit prismatic rail negative pressure control conveying guide device, the working steps are as follows:

[0050] S1: According to the production efficiency of KDF2 filter rod forming unit, the parameters of the above components are designed;

[0051] S2: According to the attached Figure 4-Figure 8 , and the description of the above components to assemble the components;

[0052] S3: Start the equipment, the whole filter rod is divided into a number of uniform filter rod segments through the combined action of the bell mouth 10, the knife disc, and the bell mouth drive assembly 11, and then enters the prismatic rail guide assembly 2;

[0053] S4: The divided filter rods are guided by the slope on the bottom surface of the right end of the cover plate 203 and enter the gap between the bottom surface of the cover plate 203 and the prismatic rail bottom plate 201;

[0054] S5: The negative pressure source performs negative pressure adsorption and constraint guidance on the filter rod on the prismatic rail bottom plate 201 through the negative pressure bin 4, the connecting air pipe 5, the negative pressure air chamber 6, and the negative pressure suction hole 2011, ensuring that the filter rod moves along a fixed direction on the prismatic rail bottom plate 201, and then enters the double acceleration wheel, which accelerates the filter rod to achieve separation of adjacent filter rods.

[0055] S6: When the filter rod moves on the prismatic rail bottom plate 201, the positive pressure air source discharges air in a positive direction through the positive pressure air guide pipe 3 and the positive pressure air outlet hole 2022 to blow air to the unqualified filter rods, thereby removing the unqualified filter rods.

[0056] Preferably, in step S6, generally when the machine is turned on or about to be turned off, the filter rod production may be unstable (such as unstable glue application), so the produced filter rods need to be rejected. When the filter rods are stably produced, the positive pressure rejection assembly is closed.

[0057] Preferably, in step S1, the parameters of each component are designed mainly for the diameter of the negative pressure air suction hole 2011 and the position design of the negative pressure air suction hole 2011. The main design steps are as follows:

[0058] 1. Design and test of negative pressure suction hole 2011 diameter

[0059] In this embodiment, when the filter rod enters the prismatic rail bottom plate 201 after being cut, it will contact the previous filter rod. When in contact, the filter rod will jump, and the jumping height cannot exceed the previous filter rod. At the same time, the filter rod can drop to a level lower than the previous filter rod after negative pressure adsorption. The simplified model is as follows Fig. 9 As shown, in this state, the running speed V of the filter rod is the conveying speed of the filter rod after cutting, and the angle is the angle between the filter rod and the horizontal plane when the filter rod is offset to the diameter of a single filter rod. According to the production capacity of the KDF2 model of 4000 pieces / min and the filter rod production specification parameters (Table 1), the speed component V1 in the vertical direction is:

[0060] V1=V·sinθ1;

[0061] Table 1 72# filter rod process parameters

[0062] Filter rod brand Length(mm) Mass(Kg) Diameter(mm) 72 100 <![CDATA[0.62*10 -3 ]]> 7.7

[0063] According to the production capacity of KDF2 of 4000 pcs / min, the filter rod interval time T can be calculated to be 0.015 seconds.

[0064] The negative pressure suction reduces the vertical velocity of the filter rod in the limit state to V2 within the time range T, and the descending distance is 0.1mm. It can be obtained that this state is the velocity component V2 of the filter rod in the vertical direction:

[0065] V2=V·sinθ2;

[0066] From the momentum theorem, we know that the negative pressure suction force is within the time range T, and the negative pressure suction force is:

[0067]

[0068] According to the maximum negative pressure of KDF2 negative pressure fan is 6500Pa, from the pressure and pressure formula F=PS and the spherical contact surface formula S=2πRH (where H is the distance from the upper plane of the arc groove to the bottom of the groove, that is, the depth of the arc surface), the diameter of the opening on the contact surface can be obtained as:

[0069]

[0070] After inputting the relevant parameters, it can be calculated that the opening radius is 1.45mm.

[0071] In order to verify the accuracy of the theoretical data, the track was tested for opening holes. Because the running track width of the prismatic filter rod is 3.2 mm, and considering the air-suction hole wrapping tightness, the air-suction hole should be smaller than 3.2 mm, so 10 hole diameters ranging from 2.2 mm to 3.1 mm were used for testing, and the experimental data are shown in Table 2.

[0072] Table 2 Equipment shutdown status record under different negative pressure suction hole states

[0073]

[0074] As shown in Table 2 above, in order to ensure that the suction force of the negative pressure suction hole 2011 is sufficient, in actual working conditions, the diameter of the negative pressure suction hole 2011 is 3 mm.

[0075] 2. Position design of negative pressure suction hole 2011

[0076] According to the rejection adjustment requirements of unqualified filter rods: when adjusting the rejection position, the filter rod head should be adjusted to a position 55 mm in front of the positive pressure air outlet 2022, that is, when rejecting the filter rod, the rejection position should be guaranteed to be within 45 mm in front of the filter rod when it is running.

[0077] When designing the position of the negative pressure suction hole 2011, it is necessary to consider the stability of filter rod rejection, that is, positive pressure rejection is required when the filter rod is guided by negative pressure constraints. Therefore, the negative pressure suction hole 2011 is set at a position 10 mm to the left of the positive pressure outlet hole 2022, and then three negative pressure suction holes 2011 are evenly distributed along the right side. This can ensure the normal operation of the filter rod and eliminate the jumping, while ensuring that the filter rod running behind will not be caused unstable guidance during rejection, and rely on the guidance of the guide bar 2012 to ensure the rejection effect of the filter rod.

[0078] The filter rod forming unit prismatic rail negative pressure controlled conveying guide device involved in the present invention guides and constrains the filter rods by means of negative pressure adsorption, and can eliminate the brush replacement work three times a week for each device, thereby saving brushes and reducing the time for brush replacement, thereby saving production costs, ensuring high-speed and stable conveying of filter rods, reducing equipment adjustment time, improving equipment operation efficiency, and reducing product quality risks.

[0079] Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0080] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A filter rod forming unit prismatic rail negative pressure control conveying guide device, characterized in that: The invention comprises a machine body (1), a prismatic rail guide assembly (2), and a negative pressure assembly, wherein the prismatic rail guide assembly (2) and the negative pressure assembly are both arranged on the machine body (1); the prismatic rail guide assembly (2) comprises a prismatic rail bottom plate (201), a prismatic rail side plate (202), and a cover plate (203); the prismatic rail side plate (202) is arranged on the prismatic rail bottom plate (201); the cover plate (203) is arranged on the side wall of the prismatic rail side plate (202); there is a gap between the cover plate (203) and the prismatic rail bottom plate (201); a filter rod is guided and transported through the gap between the cover plate (203) and the prismatic rail bottom plate (201); a plurality of negative pressure air suction holes (2011) are provided on the prismatic rail bottom plate (201); the negative pressure assembly is connected to the negative pressure air suction holes (2011), so that the negative pressure air suction holes (2011) generate negative pressure to constrain the filter rod.

2. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 1, characterized in that: The negative pressure component comprises a negative pressure chamber (6), a connecting air pipe (5), and a negative pressure source; the negative pressure chamber (6) is arranged on the bottom surface of the prismatic rail bottom plate (201), and the negative pressure chamber (6) and the prismatic rail bottom plate (201) are kept airtight; the negative pressure source is arranged in the machine body (1), and the negative pressure source is connected to the negative pressure chamber (6) via the connecting air pipe (5).

3. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 2, characterized in that: The negative pressure component further comprises a negative pressure chamber (4), wherein the negative pressure chamber (4) is arranged on the machine body (1), and the negative pressure source is connected to the connecting air pipe (5) through the negative pressure chamber (4).

4. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 2, characterized in that: The negative pressure air chamber (6) comprises an air chamber shell (601), an air chamber inner cavity (602), and an outer shell connecting plate; the air chamber inner cavity (602) is arranged in the air chamber shell (601), and the air chamber inner cavity (602) is connected to the negative pressure air suction hole (2011) and the connecting air pipe (5); the outer shell connecting plate is arranged on the air chamber shell (601); The shell connection plate is provided with a shell connection hole, the prismatic rail bottom plate (201) is provided with a prismatic rail threaded rod, the prismatic rail threaded rod is inserted into the shell connection hole and is fastened by a nut (8); the negative pressure air chamber (6) is connected to the prismatic rail guide assembly (2) via the shell connection hole, the prismatic rail threaded rod and the nut (8).

5. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 1, characterized in that: A plurality of prismatic rail side plate connection holes (2021) are provided on the side surface of the prismatic rail side plate (202), and a plurality of cover plate connection holes (2031) are provided on the side surface of the cover plate (203). The prismatic rail side plate connection holes (2021) and the cover plate connection holes (2031) are aligned, and screws (9) are inserted through the two.

6. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 1, characterized in that: The machine also comprises a positive pressure rejection component, the positive pressure rejection component comprising a positive pressure air source, a positive pressure air duct (3), and a positive pressure air outlet hole (2022), the positive pressure air source being arranged in the machine body (1), the positive pressure air outlet hole (2022) being arranged on the prismatic rail side plate (202), and the positive pressure air source and the positive pressure air outlet hole (2022) being connected via the positive pressure air duct (3).

7. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 6, characterized in that: The positive-pressure air guide tube (3) is provided with an electromagnetic valve, and the electromagnetic valve is used to control the opening and closing of the positive-pressure air guide tube (3).

8. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 6, characterized in that: The positive pressure rejection assembly further comprises a guide bar (2012), which is arranged on a side of the prismatic rail bottom plate (201) away from the prismatic rail side plate (202) and is used to guide the filter rod when the positive pressure air outlet hole (2022) rejects the filter rod.

9. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 1, characterized in that: A plurality of machine body connection holes are provided on the side wall of the prismatic rail side plate (202) away from the cover plate (203), a connection piece (7) is provided in the machine body connection hole, and the prismatic rail guide assembly (2) is provided on the machine body (1) through the machine body connection hole and the connection piece (7).

10. The filter rod forming unit prismatic rail negative pressure control conveying guide device according to claim 1, characterized in that: One end of the cover plate (203) is provided with an inclination for guiding the filter rod to enter between the cover plate (203) and the prismatic rail bottom plate (201).

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