CN112498757A

CN112498757A - Pipeline system for packaging

Info

Publication number: CN112498757A
Application number: CN201910871784.8A
Authority: CN
Inventors: 周春元; 李成效; 常正宇; 田粉莉
Original assignee: Tianjin Jialihe Forage Co ltd
Current assignee: Tianjin Jialihe Forage Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2021-03-16

Abstract

The invention discloses a pipeline system for packaging, which belongs to the technical field of feed bagging equipment and adopts the technical scheme that the pipeline system comprises three discharge hoppers, wherein the bottom end of each discharge hopper is communicated with a main discharge pipe, a flow control assembly for controlling the flow of feed particles is connected between the main discharge pipe and each discharge hopper, the bottom end of the main discharge pipe is communicated with two primary branch pipes, the bottom end of the main discharge pipe is provided with a first branch header pipe, the top end of the first branch header pipe is simultaneously communicated with one primary branch pipe at the bottom end of each main discharge pipe, and a pipeline switching assembly is arranged between the main discharge pipe and the primary branch pipes, so that the effect of improving the packaging efficiency is achieved.

Description

Pipeline system for packaging

Technical Field

The invention relates to the field of feed bagging equipment, in particular to a pipeline system for packaging.

Background

The production of fodder generally will be through filtering the raw materials, smashes after filtering, and kibbling raw materials gets into mixing apparatus and mixes, and the raw materials after the intensive mixing gets into the granulator and pelletizes, and the feed granule that prepares stores in the storage tank, needs pack the feed granule before the transportation.

When the feed particles are packaged, the packaging of the feed particles generally comprises canning and bagging according to different requirements. Canning is to pack the feed particles into a feed tank, then to erect the feed tank on a truck chassis, and to transport the feed tank directly to the animal farm. The transportation not only saves labor force, but also has lower cost, but needs the stock house for containing feed in the stock farm. The bagging is to put the feed into a bag of 40 kg, and then seal the bag. Then the bagged feed is transported to an animal farm. This kind of transportation mode is more loaded down with trivial details when the bagging-off, increases the amount of labour, and the cost is higher moreover, nevertheless, is convenient for deposit, need not set up the feed bin of special splendid attire fodder.

However, when the existing packaging system packages the feed, two discharging pipes are communicated on the same discharging hopper under a common condition and are respectively used for canning and bagging. When packing, in case the intercommunication position of play hopper and unloading pipe is blockked up, just must stop the packing, dredge work, influence packing efficiency to reduce work efficiency.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a pipeline system for packaging, which achieves the effect of improving the packaging efficiency.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a piping system is used in packing, including three play hopper, every bottom intercommunication that goes out the hopper has a main discharging pipe, be connected with the accuse stream subassembly of control fodder granule flow between main discharging pipe and the play hopper, the bottom intercommunication of main discharging pipe has two one-level bleeder pipes, the bottom of main discharging pipe is provided with first branch house steward, the top of first branch house steward communicates with an one-level bleeder pipe of every main discharging pipe bottom simultaneously, be provided with the pipeline switching subassembly between main discharging pipe and the one-level bleeder pipe.

Through adopting above-mentioned technical scheme, flow the subassembly through the accuse and control plastic granules unloading speed, and switch the pipeline that needs the unloading through the pipeline switching module, be convenient for control, easy operation, convenience. Place the feed tank in first branch house steward's bottom and carry out the canning, switch the unloading pipeline through pipeline switching subassembly, make first branch house steward intercommunication and three one-level bleeder pipe intercommunication, three one-level bleeder pipe unloading simultaneously, then assemble first branch house steward, make the fodder granule unloading in the first branch house steward fast, can improve fodder granule's unloading speed, and then improve the canning speed.

When the packaging is carried out, when one of the primary branch pipes is blocked, a worker can dredge the blocked primary branch pipe, and the rest two primary branch pipes can continue to be fed through the first branch main pipe. Therefore, when the blocked primary branch pipe is dredged, canning does not need to be stopped, the continuity of canning work can be guaranteed, the packaging efficiency can be improved, and the working efficiency is improved. In addition, three one-level bleeder pipe and same first total branch pipe intercommunication, when one of them one-level bleeder pipe is blockked up, all the other two one-level bleeder pipes can continue through the unloading of first total branch pipe, need not transfer the fodder jar to other discharging pipe bottoms, just can continue the packing, further reach the effect of continuous packing, improve packing efficiency to improve work efficiency.

The below of the one-level bleeder pipe that does not communicate with first branch house steward can be bagged, because the one-level bleeder pipe that does not communicate with first branch house steward is equipped with threely, and every one-level bleeder pipe corresponds a packagine machine in bags, then three packagine machine in bags can carry out the operation in bags simultaneously, improves packing efficiency. At the moment, canning can be carried out simultaneously, bagging and canning can be carried out simultaneously, packaging continuity can be guaranteed, packaging efficiency is improved, and working efficiency is improved.

The invention is further provided that the flow control assembly comprises a driving part and a flow control plate, the flow control plate is horizontally inserted into the main discharge pipe and is in sliding connection with the main discharge pipe and shields the main discharge pipe, and the driving part and the flow control plate are connected to drive the flow control plate to move so as to adjust the blanking speed of the feed particles.

Through adopting above-mentioned technical scheme, when needing to pack the fodder granule in the play hopper, driving piece drive control flow board removes, removes the accuse and flows the sheltering from of board to main discharging pipe to according to the packaging methods of difference, adjust fodder granule's unloading speed through the distance that the regulation accuse flow board removed, be convenient for pack fodder granule, easy operation, be convenient for control can improve work efficiency.

The invention is further provided that one end of the flow control plate, which is far away from the driving part, is fixedly connected with a plurality of limiting rods, and when the flow control plate shields the main discharging pipe, the limiting rods are abutted against the inner wall of the main discharging pipe.

Through adopting above-mentioned technical scheme, set up the gag lever post on the accuse flow board, when driving piece drive accuse flow board removed, the gag lever post can prevent to control that flow board displacement is too big and make the separation of accuse flow board and main discharging pipe, can guarantee the normal use of accuse flow board. On the other hand, when the ejection of compact position of hopper was blockked up by the fodder granule, driving piece drive control flowed the board and removed, and the gag lever post on the board is flowed in the accuse can carry out the disturbance to the fodder granule, and the mediation is blockked up the position, and easy operation, convenience can improve work efficiency.

The invention is further provided that the driving part is a first air cylinder, the first air cylinder is fixedly connected with the main discharging pipe, and a piston rod of the first air cylinder is fixedly connected with the flow control plate.

Through adopting above-mentioned technical scheme, first cylinder installation is simple, swift, easy operation, convenient to use simultaneously improve the convenience when using. First cylinder and accuse flow board fixed connection can drive and control the removal of class board, are convenient for adjust the unloading speed of fodder granule in the main discharging pipe to be convenient for adapt to different packaging methods.

The pipeline switching assembly further comprises a shielding plate and a switching shaft, the shielding plate is located at the position where the main discharging pipe is communicated with the first-stage branch pipe to shield the first-stage branch pipe, the switching shaft is fixedly connected with the shielding plate, and two ends of the switching shaft penetrate through the first-stage branch pipe and then are rotatably connected with the first-stage branch pipe.

Through adopting above-mentioned technical scheme, rotate the switching shaft, because of switching shaft and shielding plate fixed connection, then the shielding plate rotates along with the switching shaft. When the shielding plate rotates the communicating position of one of the first-level branch pipes and the main discharging pipe, the first-level branch pipe can be shielded, and then the feed particles are discharged through the other first-level branch pipe. When one-level lateral pipe needs to be switched, the switching shaft is rotated, the shielding plate is rotated away from the position of the one-level lateral pipe needing blanking, and the position of the one-level lateral pipe needing shielding is rotated, so that switching of the one-level lateral pipe is realized. When the shielding plate rotates to the middle position of the two first-level branch pipes, the two first-level branch pipes can be fed. The operation is simple and convenient, and the convenience in actual operation is improved, so that the working efficiency can be improved.

The invention is further arranged in that a driving assembly for driving the switching shaft to rotate is connected to the switching shaft, the driving assembly comprises a connecting rod and a second air cylinder, the connecting rod is fixedly connected with the switching shaft, a piston rod of the second air cylinder is hinged with the connecting rod, and the second air cylinder is hinged with the first-stage branch pipe.

Through adopting above-mentioned technical scheme, the one end and the switching axle fixed connection of connecting rod, the other end is articulated with the second cylinder, and the second cylinder is articulated with one-level bleeder, and when needing to switch one-level bleeder, through the concertina movement of second cylinder, make the connecting rod rotate along the axis direction of switching axle to drive switching axle and shielding plate and rotate, realize the switching operation to one-level bleeder. Simultaneously, when the shielding plate rotated the intercommunication position of one-level bleeder pipe and main discharging pipe, the second cylinder was fixed the shielding plate, can prevent that the shielding plate from rocking, increased the effect of sheltering from of shielding plate, reduced the condition that the one-level bleeder pipe that the fodder granule never needed the unloading flows to reduce the waste of fodder granule.

The discharge hopper comprises a first-stage hopper bin, a second-stage hopper bin and a third-stage hopper bin, the first-stage hopper bin, the second-stage hopper bin and the third-stage hopper bin are sequentially arranged and communicated from top to bottom, the volumes of the first-stage hopper bin, the second-stage hopper bin and the third-stage hopper bin are sequentially reduced, and the bottom end of the third-stage hopper bin is communicated with the main discharge pipe.

Through adopting above-mentioned technical scheme, the fodder granule leans on self gravity unloading in going out the hopper, and the fodder granule is at the in-process that flows downwards, and more downward flow, the sectional area that goes out the hopper is less, forms the extrusion to fodder granule itself, and increase frictional force causes out the hopper bottom to block up easily.

And the discharge hopper is arranged into a form of a first-level hopper bin, a second-level hopper bin and a third-level hopper bin, and the volume of the discharge hopper is reduced in sequence. The friction force between the feed particles at the bottom of the discharge hopper is reduced, so that the situation that the main discharge pipe is blocked can be reduced, the discharging smoothness is improved, and the working efficiency is improved.

The invention is further provided that the bottom end of the main discharging pipe is provided with a second branch main pipe, and the top end of the second branch main pipe is simultaneously communicated with two first-stage branch pipes which are not communicated with the first branch main pipe.

Through adopting above-mentioned technical scheme, at two one-level bleeder pipes of second branch house steward top intercommunication, then when carrying out the operation of bagging-off in the second branch house steward bottom, if one of them one-level bleeder pipe is blockked up, then another one-level bleeder pipe can continue the unloading, improves the continuity of unloading. Meanwhile, a bag packaging machine does not need to be arranged below each primary branch pipe, and cost is saved.

In conclusion, the invention has the following beneficial effects:

1. the three first-stage branch pipes are communicated through the first branch main pipe, when the feed is canned, if one of the first-stage branch pipes is blocked, the other two first-stage branch pipes can continue to feed, so that the feeding continuity is ensured, the packaging efficiency is improved, and the working efficiency is improved; the pipeline is switched through the pipeline switching assembly, so that the first-stage branch pipes which are not communicated with the first branch main pipe can be discharged to be bagged. At the moment, canning can be carried out simultaneously, bagging and canning can be carried out simultaneously, packaging continuity can be guaranteed, packaging efficiency is improved, and therefore working efficiency is improved;

2. the flow control plate is fixedly connected with a limiting rod, and the limiting rod can prevent the flow control plate from being separated from the main discharge pipe, so that the flow control plate can be normally used. In addition, when the discharging position of the discharging hopper is blocked by the feed particles, the driving piece drives the flow control plate to move, the limiting rod can disturb the feed particles, the blocked position is dredged, the operation is simple and convenient, and the working efficiency is improved;

3. at first, set up three play hopper, with the feed particle partial shipment to three play hopper in, can reduce the feed particle's that holds in every feed bin volume to reduce the frictional force between the feed particle of play hopper bottom, reduce the circumstances that the play hopper is blockked up. And three play hopper even one of them goes out hopper and is blockked up, then remaining two play hoppers can normal use to guarantee normal packing work.

Go out the hopper and set to the form of one-level hopper storehouse, second grade hopper storehouse and tertiary hopper storehouse, when fodder granule followed one-level hopper storehouse landing to second grade hopper storehouse, because the open-top of second grade hopper storehouse is greater than the bottom opening of one-level hopper storehouse, help reducing the condition that one-level hopper storehouse bottom was blockked up. Similarly, the open-top of tertiary hopper storehouse is greater than the open-top of second grade hopper storehouse, then can reduce the condition that tertiary hopper storehouse bottom is blockked up.

And the volume of one-level hopper storehouse, second grade hopper storehouse and tertiary hopper storehouse reduces in proper order, and then the fodder granule that holds in one-level hopper storehouse, second grade hopper storehouse and the tertiary hopper storehouse reduces in proper order, and consequently, frictional force and impact force between the fodder granule of one-level hopper storehouse, second grade hopper storehouse and tertiary hopper storehouse bottom also reduce in proper order. Therefore, frictional force and impact force between tertiary hopper storehouse bottom feed pellet are less, can effectively reduce the circumstances because of the great main discharging pipe of jam of frictional force between the feed pellet, guarantee the smooth and easy nature of feed pellet unloading.

Two primary branch pipes are communicated with the bottom end of the main discharging pipe, and two secondary branch pipes are communicated with the primary branch pipes, so that the number of discharging pipelines is increased by a bifurcated structure, one main discharging pipe is communicated with the two primary branch pipes, the primary branch pipes can discharge feed particles in the main discharging pipe in time, and the situation that the main discharging pipe is blocked is reduced; in a similar way, two second grade bleeder of a one-level bleeder intercommunication, second grade bleeder can in time discharge the fodder granule in the one-level bleeder, reduces the condition that one-level bleeder is blockked up. To sum up, from one-level hopper storehouse, second grade hopper storehouse, tertiary hopper storehouse, main discharging pipe, one-level bleeder and second grade bleeder again, the homoenergetic reduces the condition of being blockked up by the fodder granule, consequently, can reduce the condition that whole pipe-line system is blockked up by the fodder granule, guarantees the smooth and easy nature of fodder granule packing, improves work efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a partial structure intended to show a flow control assembly and a drive assembly;

FIG. 3 is a partial cross-sectional view intended to show a stop lever;

fig. 4 is a partial cross-sectional view intended to show the pipe switching assembly.

Reference numerals: 1. a discharge hopper; 11. a first-level hopper bin; 12. a second-stage hopper bin; 13. a third-stage hopper bin; 131. a main discharge pipe; 1311. a first-stage branch pipe; 1312. a first branch manifold; 1313. a second branch header; 1314. a secondary branch pipe; 2. a flow control assembly; 21. a first cylinder; 22. a flow control plate; 221. a limiting rod; 3. a pipeline switching component; 31. a shielding plate; 32. a switching shaft; 4. a drive assembly; 41. a connecting rod; 42. a second cylinder.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a piping system for packing, combines fig. 1 and fig. 2, includes three hopper 1, and the bottom subsection intercommunication of every hopper 1 has main discharging pipe 131, is connected with accuse stream subassembly 2 between main discharging pipe 131 and the hopper 1, and the bottom intercommunication of main discharging pipe 131 has two one-level bleeder 1311, is connected with pipeline switching module 3 between one-level bleeder 1311 and the main discharging pipe 131. Below the main tapping pipe 131, a first branch header 1312 is provided, the top end of the first branch header 1312 communicating simultaneously with one primary branch pipe 1311 at the bottom end of each main tapping pipe 131.

When carrying out canning packing to the fodder granule in the play hopper 1, put the bottom of first branch total pipe 1312 with the fodder jar, switch the pipeline through pipeline switching module 3, make first branch total pipe 1312 communicate with three main discharging pipe 131 simultaneously. Then, the main discharging pipe 131 is unblocked by the flow control assembly 2, and the discharging speed is adjusted, so that the feed particles in the discharging hopper 1 are canned through the main discharging pipe 131, the primary branch pipe 1311 and the first branch header pipe 1312. The bottom ends of the primary branch pipes 1311 which are not communicated with the first branch trunk 1312 can be bagged and packaged while canning, so that the packaging efficiency is improved, and the working efficiency is improved.

As shown in fig. 1, each discharge hopper 1 includes a first-stage hopper 11, a second-stage hopper 12, and a third-stage hopper 13, and the first-stage hopper 11, the second-stage hopper 12, and the third-stage hopper 13 are sequentially arranged from top to bottom and are communicated with each other. One-level hopper 11, second grade hopper 12 and tertiary hopper 13 all are open-top, the little square funnel shaped structure of bottom opening, and the volume reduces in proper order. The main discharging pipe 131 is a square pipe structure and is communicated with the bottom of the third-stage hopper 13.

Referring to fig. 2 and 3, the flow control assembly 2 is located between the main tapping pipe 131 and the tertiary hopper 13. The flow control assembly 2 comprises a driving member and a flow control plate 22, the flow control plate 22 being horizontally inserted into the main discharging pipe 131 to prevent the feed particles from falling. The driving part is a first air cylinder 21, the first air cylinder 21 is fixedly connected with the main discharging pipe 131, a piston rod of the first air cylinder 21 is fixedly connected with the flow control plate 22, and the flow control plate 22 is driven to move in the horizontal direction. The top surface and the bottom surface of the flow control plate 22 are both fixedly connected with a plurality of limiting rods 221, and the limiting rods 221 are vertically located on one side of the flow control plate 22 far away from the first cylinder 21. When the flow control plate 22 completely covers the main discharge pipe 131, the stopper rod 221 abuts against the inner wall of the main discharge pipe 131.

When filling or bagging, the first air cylinder 21 drives the flow control plate 22 to move, so that the main discharge pipe 131 and the third-stage hopper bin 13 are shielded by the flow control plate 22, the feed particle feeding speed is adjusted, and feed particles can be fed smoothly. When the bottom of the third-level hopper 13 is blocked, the first cylinder 21 drives the flow control plate 22 to reciprocate in the horizontal direction, so that the limiting rod 221 drives feed particles at the blocking position to disturb, and the communication position between the third-level hopper 13 and the main discharge pipe 131 is dredged.

Referring back to FIG. 1, the bottom end of the main tapping pipe 131 is provided with a second branch header 1313, and the top end of the second branch header 1313 is connected to two primary branch pipes 1311 which are not connected to the first branch header 1312. The bottom end of the second branch trunk 1313 is provided with a bag packer. The primary manifold 1311, which is not in communication with either the second manifold 1313 or the first manifold 1312, is used for manual packaging. A secondary branch pipe 1314 is communicated with the primary branch pipe 1312 communicated with the second branch trunk 1313.

Referring to fig. 2 and 4, a pipe switching assembly 3 is connected between the primary tapping pipe 1311 and the main tapping pipe 131, the pipe switching assembly 3 includes a shielding plate 31 and a switching shaft 32, and the shielding plate 31 is located in the main tapping pipe 131 and is located at a position where the primary tapping pipe 1311 communicates with the main tapping pipe 131. The outer peripheral surface of the shielding plate 31 abuts against the inner wall of one of the primary branch pipes 1311 to shield the one of the primary branch pipes 1311. The bottom end of the shielding plate 31 is fixedly connected to the switching shaft 32, and both ends of the switching shaft 32 are rotatably connected to the first branch pipes 1311 after passing through the first branch pipes 1311. One end of the switching shaft 32 is connected to a driving assembly 4 for driving the switching shaft 32 to rotate.

Referring back to fig. 2, the driving assembly 4 includes a connecting rod 41 and a second cylinder 42, one end of the connecting rod 41 is fixedly connected to the switching shaft 32, the other end of the connecting rod 41 is hinged to a piston rod of the second cylinder 42, and the second cylinder 42 is hinged to the main discharging pipe 131.

When the pipeline needs to be switched, the second cylinder 42 drives the connecting rod 41 to rotate, and the connecting rod 41 rotates to drive the switching shaft 32 to rotate, so that the shielding plate 31 rotates, and the shielding plate 31 can be switched between different first-stage branch pipes 1311 to shield different first-stage branch pipes 1311.

The using process of the invention is as follows:

when in use, prepared feed particles are poured into the three discharging hoppers 1. When canning is needed, the second air cylinder 42 drives the connecting rod 41 to rotate, so that the shielding plate 31 is driven to rotate, and the three first-stage branch pipes 1311 communicated with the first branch header pipe 1312 are simultaneously communicated with the main discharge pipe 131; then, the first cylinder 21 drives the flow control plate 22 to move, so that the feed particles in the discharge hopper 1 pass through the main discharge pipe 131, the primary branch pipe 1311 and the first branch header pipe 1312 to be canned. After one of the first-level branch pipes 1311 is blocked, the feed particles can still be smoothly discharged, the canning continuity is guaranteed, the canning efficiency is improved, and therefore the working efficiency is improved.

Similarly, when the bag is required to be bagged, the shielding plate 31 is rotated to communicate the main discharging pipe 131 with the second branch header pipe 1313, and then the first cylinder 21 drives the flow control plate 22 to move, so that the feed particles in the discharging hopper 1 are bagged after passing through the main discharging pipe 131, the first-stage branch pipe 1311 and the second branch header pipe 1313.

When canning and bagging are required to be carried out simultaneously, the shielding plate 31 is rotated to the middle positions of the two primary branch pipes 1311, the first branch header pipe 1312 and the second branch header pipe 1313 are communicated with the main discharge pipe 131 simultaneously, and canning and bagging can be carried out simultaneously, so that the packaging efficiency is improved, and the working efficiency is improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A packaging duct system, comprising: including three hopper (1), the bottom intercommunication of every hopper (1) has one main discharging pipe (131), be connected with between main discharging pipe (131) and the hopper (1) and control a stream subassembly (2) of control fodder granule flow, the bottom intercommunication of main discharging pipe (131) has two one-level bleeder (1311), the bottom of main discharging pipe (131) is provided with first branch house steward (1312), the top of first branch house steward (1312) communicates with one-level bleeder (1311) of every main discharging pipe (131) bottom simultaneously, be provided with pipeline switching subassembly (3) between main discharging pipe (131) and one-level bleeder (1311).

2. A packaging duct system according to claim 1, wherein: the flow control assembly (2) comprises a driving piece and a flow control plate (22), the flow control plate (22) is horizontally inserted into the main discharge pipe (131) and is in sliding connection with the main discharge pipe (131) and shields the main discharge pipe (131), and the driving piece and the flow control plate (22) are connected and drive the flow control plate (22) to move so as to adjust the blanking speed of feed particles.

3. A packaging duct system according to claim 2, wherein: one end of the flow control plate (22) far away from the driving piece is fixedly connected with a plurality of limiting rods (221), and when the flow control plate (22) shields the main discharge pipe (131), the limiting rods (221) are abutted against the inner wall of the main discharge pipe (131).

4. A packaging duct system according to claim 2, wherein: the driving piece is a first air cylinder (21), the first air cylinder (21) is fixedly connected with the main discharge pipe (131), and a piston rod of the first air cylinder (21) is fixedly connected with the flow control plate (22).

5. A packaging duct system according to claim 1, wherein: pipeline switches subassembly (3) includes shielding plate (31) and switching shaft (32), and shielding plate (31) are located the position of main discharging pipe (131) and one-level bleeder (1311) intercommunication in order to shelter from one-level bleeder (1311), and switching shaft (32) and shielding plate (31) fixed connection, and the both ends of switching shaft (32) are worn out behind one-level bleeder (1311) and are rotated with one-level bleeder (1311) and be connected.

6. The packaging duct system of claim 5, wherein: the switching shaft (32) is connected with a driving assembly (4) for driving the switching shaft (32) to rotate, the driving assembly (4) comprises a connecting rod (41) and a second air cylinder (42), the connecting rod (41) is fixedly connected with the switching shaft (32), a piston rod of the second air cylinder (42) is hinged to the connecting rod (41), and the second air cylinder (42) is hinged to the first-stage branch pipe (1311).

7. A packaging duct system according to claim 1, wherein: go out hopper (1) and include one-level hopper storehouse (11), second grade hopper storehouse (12) and tertiary hopper storehouse (13), one-level hopper storehouse (11), second grade hopper storehouse (12) and tertiary hopper storehouse (13) from the top down arrange in proper order and communicate, the volume of one-level hopper storehouse (11), second grade hopper storehouse (12) and tertiary hopper storehouse (13) reduces in proper order, the bottom and the main discharging pipe (131) intercommunication of tertiary hopper storehouse (13).

8. A packaging duct system according to claim 1, wherein: the bottom end of the main discharging pipe (131) is provided with a second branch header pipe (1313), and the top end of the second branch header pipe (1313) is simultaneously communicated with two first-stage branch pipes (1311) which are not communicated with the first branch header pipe (1312).