Following dust collection device

Abstract

A follow-up dust collection device comprises a base, a rotating frame and a driving device for driving the rotating frame to rotate are arranged on the base, a discharging bin and a plurality of discharging hoppers are arranged on the rotating frame, a fixing ring is arranged on the base, a rotating ring is arranged on the rotating frame, and an annular air cavity is defined by the fixing ring and the rotating ring. A plurality of dust suction pipes are arranged on the outer side of the rotating ring in the circumferential direction, the tail ends of the dust suction pipes point to the lower portion of the discharging hopper, a dust suction channel is formed in the base, a through hole matched with the dust suction channel is formed in the fixing ring, and a sealing piece is arranged between the fixing ring and the rotating ring. The annular air cavity is defined by the fixing ring and the rotating ring, the dust suction pipe is arranged on the rotating ring and points to the discharging hopper, a dust suction channel does not need to be arranged in the center of the device, the layout of a dust suction pipeline in the device is reduced, the trouble that multiple dust suction pipes are connected with the dust suction channel is omitted, the structure is simple, and cleaning and maintenance are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of filling equipment, in particular to a follow-up dust collection device. Background Art

[0002] The unloading of the packaging machine refers to the process of filling the packaging bag with materials through the filling device. The filling form of conventional flexible packaging bags is intermittent filling, that is, the packaging bags are transported one by one to the lower side of the filling device and stopped. The filling device opens the filling pipe to fill the packaging bags. After filling, the packaging bags continue to be transported intermittently, so that the filling device performs intermittent filling operations on the packaging bags one by one. When filling powder, a lot of dust will be generated after the powder falls. The current dust collection method is to set another dust collection pipe near the unloading funnel, and the bottom of the dust collection pipe faces the bag opening. The dust floating after the powder filling can be sucked away through the bottom of the dust collection pipe. For the above-mentioned intermittent filling process, the applicant has optimized the filling method and has applied for an invention patent (publication number CN113978825B, named a bag packaging continuous follow-up unloading mechanism), which includes a rotatable material distribution bin and a unloading funnel. The material distribution bin can be driven by a driving device to rotate horizontally along with the transportation of the packaging bag. The unloading funnel can move and unload along with the packaging bag during the transportation of the packaging bag. The filling and transportation steps can be carried out simultaneously to improve the filling efficiency. A dust suction pipe is also provided on one side of the unloading funnel. The dust suction pipe can also be used to vacuum while following the transportation of the packaging bag. However, in the above application, a dust suction duct needs to be provided in the center of the device. The dust from multiple dust suction pipes is transported upward after being collected and gathered into the dust suction duct. The layout of the dust suction pipe is relatively long, and the connection between the multiple dust suction pipes and the dust suction duct also needs to be welded or connected through a special connection mechanism. The structure is relatively complex and cleaning and maintenance are relatively difficult. Summary of the Invention

[0003] The object of the present invention is to provide a follow-up dust suction device, which solves the above-mentioned problems by working with the device.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a follow-up dust collection device, comprising a base, a rotating frame and a driving device for driving the rotating frame to rotate are provided on the base, a lower material bin and several lower material hoppers are provided on the rotating frame, a fixed ring is provided on the base, a rotating ring is provided on the rotating frame, the fixed ring and the rotating ring form an annular air cavity, several dust collection tubes are circumferentially provided on the outer side of the rotating ring, and the ends of the dust collection tubes point to the lower part of the lower material hopper, a dust collection duct is provided on the base, a through hole is provided on the fixed ring to cooperate with the dust collection duct, and a seal is provided between the fixed ring and the rotating ring.

[0005] Furthermore, the fixing ring is provided with two wind shields for dividing the wind cavity into two parts, and the through hole is provided between the two wind shields.

[0006] Furthermore, the bottom of the dust suction duct is connected to a bellows, and two air ducts are provided on the bellows. Two through holes are provided on the fixing ring. The two air ducts are connected to the ventilation cavity through the two through holes respectively, and an air partition is provided between the two through holes.

[0007] Furthermore, an arc-shaped material drop chute is provided on the base, and the material drop chute is provided just below the running track of the lower hopper. The material drop chute is provided on a side away from the through hole, and a material collection box is provided at the end of the material drop chute.

[0008] Furthermore, the rotating ring is fixed to the rotating frame by bolts, and the rotating ring includes four sector rings plugged into each other.

[0009] Furthermore, an annular dust hood is provided at the end of the dust suction pipe, the dust hood is sleeved on the lower part of the lower hopper, the dust suction pipe is connected to the side of the dust suction hood, and a bottom ring is provided inward at the bottom of the dust suction hood, and the inner edge of the bottom ring is tilted upward toward the center.

[0010] Furthermore, the sealing member is a sealing ring, the rotating ring is provided with an embedding groove for matching the sealing ring, the outer periphery of the sealing ring is provided with a downwardly inclined outer ring, and the outer ring is attached to the outer periphery of the fixed ring.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention forms an annular air cavity through the fixed ring and the rotating ring, and a dust suction pipe is arranged on the rotating ring to point to the lower hopper. There is no need to set a dust suction duct in the center of the device, which reduces the layout of the dust suction pipeline in the device and saves the trouble of connecting multiple dust suction pipes to the dust suction duct. The structure is simple and easy to clean and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention;

[0013] Figure 2 This is a three-dimensional schematic diagram of the arrangement of the dust collection pipe on the rotating ring according to an embodiment of the present invention;

[0014] Figure 3 This is a schematic top view of the conveying direction of packaging bags according to an embodiment of the present invention;

[0015] Figure 4 This is a three-dimensional exploded schematic diagram of the cooperation between the rotating ring and the fixed ring according to an embodiment of the present invention;

[0016] Figure 5 Schematic diagram of the bottom surface of the dust collection hood according to an embodiment of the present invention;

[0017] Figure 6 Schematic cross-sectional view of a sealing member according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] like Figure 1-6 As shown, the purpose of this embodiment is to provide a follow-up dust collection device, including a base 1, a rotating frame 2 and a driving device for driving the rotating frame 2 to rotate are provided on the base 1 (the rotation method of the rotating frame 2 is the same as that of the follow-up unloading device previously applied for by the applicant, and the rotating frame 2 is also driven by a motor to rotate, so the driving device is not shown in the figure), a unloading bin 3 and a plurality of unloading hoppers 4 are provided on the rotating frame 2, a fixing ring 5 is provided on the base 1, a rotating ring 6 is provided on the rotating frame 2, the fixing ring 5 and the rotating ring 6 form an annular wind cavity, a plurality of dust collection pipes 7 are circumferentially provided on the outer side of the rotating ring 6, and the ends of the dust collection pipes 7 point to the lower part of the unloading hopper 4, a dust collection duct 8 is provided on the base 1, and a suction device (not shown in the figure) is provided at the starting end of the dust collection duct 8, a through hole 9 is provided on the fixing ring 5 to cooperate with the dust collection duct 8, and a sealing member is provided between the fixing ring 5 and the rotating ring 6;

[0021] The working principle of this embodiment is as follows: the packaging bag is transported by the clamping mechanism, and after being transported to the device, the material is unloaded and dust is collected at the same time. The conveying range of the packaging bag on the periphery of the rotary frame 2 covers 180 degrees of rotation of the rotary frame 2. When the unloading hopper 4 unloads the material, the dust collection duct 8 generates negative pressure in the air cavity through the through hole 9, and the air cavity performs a dust collection operation on the bottom of the unloading hopper 4 through the dust collection pipe 7 on the rotating ring 6. While the packaging bag is being transported, the unloading hopper 4 unloads the material, and the dust collection pipe 7 is used to collect dust, so as to achieve the effect of following unloading and following dust collection. There is no need to set the dust collection duct 8 in the center of the device, which reduces the layout of the dust collection pipe 7 in the device and also saves the trouble of connecting multiple dust collection pipes 7 with the dust collection duct 8. The structure is simple and easy to clean and maintain.

[0022] like Figure 4As shown, preferably, two windshields 10 are provided on the fixing ring 5 to divide the air cavity into two parts, and the through hole 9 is provided between the two windshields 10. There is negative pressure on the side of the two windshields 10 close to the through hole 9, while there is no negative pressure on the other side of the air cavity blocked by the windshield 10, that is, the dust suction pipe 7 on the rotating ring 6 can suction dust through negative pressure when it rotates to the air cavity containing the through hole 9, and stops suctioning dust when it rotates to the air cavity not containing the through hole 9, so as to make the negative pressure more concentrated, improve the dust suction effect, and reduce energy waste. During operation, the span of the packaging bag, the discharge hopper 4 and the dust suction pipe 7 is 180°. In this embodiment, the angle between the two windshields 10 is 190°, so as to meet the requirement that the dust suction pipe 7 can perform dust suction operation during the whole process of unloading the packaging bag;

[0023] Preferably, the bottom of the dust suction duct 8 is connected to a bellows 11, and two air ducts 12 are provided on the bellows 11. The dust suction duct 8 is connected to the two air ducts 12 through the bellows 11. Two through holes 9 are provided on the fixing ring 5. The two air ducts 12 are connected to the ventilation cavity through the two through holes 9 respectively. A wind baffle 13 is provided between the two through holes 9; the wind baffle 13 can avoid turbulence when the dust suction pipe 7 rotates between the two through holes 9, that is, the negative pressures of the two through holes 9 do not interfere with each other;

[0024] Preferably, an arc-shaped feeding chute 14 is provided on the base 1, and the feeding chute 14 is arranged just below the running track of the lower hopper 4, and the feeding chute 14 is arranged on a side away from the through hole 9. A collecting box 15 is provided at the end of the feeding chute 14. After the packaging bag is unloaded, the packaging bag continues to be transported away from the lower hopper 4 and the dust suction pipe 7, and then the dust suction pipe 7 rotates to the side of the air cavity away from the through hole 9. There is no negative pressure at the dust suction pipe 7, and the dust in the dust suction pipe 7 may fall. The feeding chute 14 can catch the falling dust, which is convenient for cleaning. In addition, during the long-term operation of the device, it is inevitable that the feeding roller in the lower hopper 4 will leak powder. For the position where there is a packaging bag at the bottom of the lower hopper 4, the powder can directly leak into the packaging bag, while the powder leaked from the lower hopper 4 without a packaging bag at the bottom can be caught by the feeding chute 14, which is convenient for cleaning the blanking.

[0025] Preferably, the swivel 6 is fixed to the swivel frame 2 by bolts. The swivel 6 includes four mutually plugged sector rings 61. The sector rings 61 are plugged in the up and down directions by means of protrusions 62 and grooves 63. The swivel 6 can be disassembled to meet the requirements of food-grade powder filling, and the air cavity can be disassembled for easy regular cleaning.

[0026] like Figure 2-5As shown, preferably, an annular dust hood 16 is provided at the end of the dust suction pipe 7, and the dust suction hood 16 is sleeved on the lower part of the lower hopper 4. The dust suction pipe 7 is connected to the side of the dust suction hood 16, and a bottom ring 161 is provided inward at the bottom of the dust suction hood 16. The inner edge 162 of the bottom ring 161 is tilted upward toward the center; the dust suction pipe 7 can be used to suck dust through the dust suction hood 16, and the covering effect is better. The dust suction pipe 7 sucks dust on the side of the dust suction hood 16, which can make the dust in the dust suction hood 16 rotate, and the dust rotates to the dust suction hood 16 due to centrifugal force. 6 and then sucked out. When the dust hood 16 stops sucking dust, the dust that has not been sucked out in the dust hood 16 is close to the side wall of the dust hood 16 due to the action of centrifugal force. The bottom ring 161 and the raised inner edge 162 of the bottom ring 161 can drag the dust, thereby further reducing the leakage of dust. In this embodiment, the lower side of the discharge hopper 4 will move downward into the packaging bag when discharging materials. The dust hood 16 and the dust suction pipe 7 can be connected by a hose 18 to achieve the effect that the dust hood 16 can move with the discharge hopper 4.

[0027] like Figure 6 As shown, preferably, the sealing member is a sealing ring 17, and a groove 64 is provided on the rotating ring 6 to cooperate with the sealing ring 17. The outer periphery of the sealing ring 17 is provided with a downwardly inclined outer ring 171, and the outer ring 171 is attached to the outer periphery of the fixed ring 5. The sealing ring 17 can be a wind cavity seal between the rotating ring 6 and the fixed ring 5, and when negative pressure is generated in the wind cavity, the outer ring 171 can also be attached to the outer periphery of the fixed ring 5 by elasticity to improve the airtightness.

[0028] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A follow-up dust collection device, comprising a base, a rotating frame and a driving device for driving the rotating frame to rotate, the rotating frame being provided with a discharge bin and a plurality of discharge hoppers, characterized in that: A fixed ring is provided on the base, a swivel is provided on the rotating frame, the fixed ring and the swivel form an annular air cavity, a plurality of dust suction tubes are circumferentially provided on the outer side of the swivel, and the ends of the dust suction tubes point to the lower part of the lower hopper, a dust suction duct is provided on the base, a through hole is provided on the fixed ring to cooperate with the dust suction duct, and a seal is provided between the fixed ring and the swivel.

2. The follow-up dust collection device according to claim 1, characterized in that: The fixing ring is provided with two wind shields which divide the wind cavity into two parts, and the through hole is provided between the two wind shields.

3. The follow-up dust collection device according to claim 2, characterized in that: The bottom of the dust suction duct is connected to a bellows, the bellows is provided with two air ducts, the fixing ring is provided with two through holes, the two air ducts are connected to the ventilation cavity through the two through holes respectively, and a wind partition is provided between the two through holes.

4. The follow-up dust collection device according to claim 2, characterized in that: An arc-shaped material dropping chute is provided on the base, and the material dropping chute is arranged just below the running track of the lower hopper. The material dropping chute is arranged on a side away from the through hole, and a material collecting box is provided at the end of the material dropping chute.

5. The follow-up dust collection device according to claim 1, characterized in that: The rotating ring is fixed on the rotating frame by bolts, and the rotating ring includes four sector rings plugged into each other.

6. The follow-up dust collection device according to claim 1, characterized in that: An annular dust hood is provided at the end of the dust suction pipe, and the dust hood is sleeved on the lower part of the lower hopper. The dust suction pipe is connected to the side of the dust hood. A bottom ring is provided inwardly at the bottom of the dust suction hood, and the inner edge of the bottom ring is tilted upward toward the center.

7. The follow-up dust collection device according to claim 1, characterized in that: The sealing member is a sealing ring. A groove is provided on the rotating ring to match the sealing ring. A downward-sloping outer ring is provided on the outer periphery of the sealing ring. The outer ring is attached to the outer periphery of the fixed ring.

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