A bag opening machine

Abstract

The present invention discloses a bag opening machine. The bag opening machine includes a conveyor belt, an auxiliary crushing knife, an upper knife group, a film separator, a positive and negative pressure separator and a lower frame; an upper cover assembly is installed above the lower frame and a material chute is installed below the rear end discharge port, and a wind nozzle is provided above the rear baffle of the material chute; the conveyor belt is distributed in two main beams, and a plurality of auxiliary crushing knives are installed in a rectangular array on the scale plate of the conveyor belt; the knife holder of the upper knife group is connected to the inner wall of the upper cover assembly, and a plurality of upper bag opening knives are connected at equal intervals under the load chain, and the upper bag opening knives and the lower auxiliary knives cooperate with each other to tear and cut the packaging bag in two directions; the film separator is located at the front open end of the material chute, and the film separator recycles large pieces of film and crushes the unfinished bags for a second time, and the positive and negative pressure separator is located below the film separator, and the positive and negative pressure separator recycles small films. The present invention has the effects of fast automatic bag breaking speed, good bag breaking effect, and effective film recovery.

Description

Technical Field

[0001] The invention relates to the field of garbage sorting, and in particular to a bag opening machine. Background Art

[0002] With the rapid development of urbanization, garbage and waste are increasing rapidly. Domestic garbage occupies land, pollutes the environment and affects people's health. At present, cities advocate garbage classification and recycling. People usually put the corresponding types of garbage in plastic bags. In order to sort the materials, they usually open and tear the plastic bags one by one manually to release the internal garbage. The disadvantages are: the garbage bags are broken slowly, the production efficiency is low, and a lot of manpower is consumed, which is not good for the health of workers. Summary of the invention

[0003] In order to solve one or more of the above problems, the present invention provides a bag opening machine.

[0004] According to one aspect of the present invention, the bag opening machine comprises a conveyor belt, an auxiliary crushing knife, an upper knife group, a film separator, a positive and negative pressure separator and a lower frame;

[0005] An upper cover assembly of a shell structure with upper and lower openings is installed above the two parallel main beams of the lower frame, a material discharge chute is installed below the rear end discharge port of the main beam, and an air nozzle is provided above the rear baffle of the material discharge chute;

[0006] The two annular load-bearing chains of the conveyor belt are driven to rotate by the main driving part and are symmetrically distributed in the two main beams. A scale plate is fixed to each link of the load-bearing chain, and all scale plates are attached front and back to form an annular load-bearing belt.

[0007] A plurality of auxiliary crushing knives are installed in a rectangular array on the scale plate. The blade of the lower auxiliary knife of the auxiliary crushing knife is opposite to the moving direction of the conveyor belt. The longitudinally adjacent auxiliary crushing knives are respectively attached to the longitudinal baffles of the scale plate. The lower auxiliary knife fixes the packaging bag and passively cuts the bottom of the packaging bag.

[0008] The knife holder of the upper knife group is connected to the inner wall of the upper cover assembly, and two driving motors are respectively fixed on both ends of the knife holder. A number of load chains are arranged at equal intervals in the knife holder. The two driving motors drive the load chains of odd rows and even rows to rotate in opposite directions respectively. A number of upper bag opening knives are connected at equal intervals under the load chains. The upper bag opening knives and the lower auxiliary knives cooperate with each other to tear and cut the packaging bags in two directions.

[0009] The film separator is located at the front open end of the feeding chute. The separation roller of the film separator is rotatably connected under the main beam. The separation roller is provided with a number of separation grooves that match the clearance of the lower auxiliary knife. Under the blowing of the air nozzle, the light film is brought into the separation groove by the lower auxiliary knife for secondary bag breaking and is separated by rotation.

[0010] The positive and negative pressure separator is located below the film separator. A number of suction and release holes are evenly distributed on the rotating suction and release pipe of the positive and negative pressure separator. When facing the air nozzle, the suction and release holes absorb the fine film; the suction and release holes on the other side release the fine film.

[0011] This bag opening machine realizes the movement of materials at a fixed position, the upper knife group and the lower auxiliary knife break the bags alternately up and down, the separation trough and the lower auxiliary knife break the bags twice, so that the packaging bags are completely broken, the large pieces of film are recovered by the separation roller, and the positive and negative pressure separators recover the small films, so that all the film materials are efficiently recovered and the heavy substances are separated. Its beneficial effects are: first, the bag breaking speed is fast, the production efficiency is high, and the workers are reduced to work in harsh environments and protect the health of workers; second, the packaging bags are completely broken through staggered cutting and secondary cutting, and the bag breaking effect is good. There is no mixing phenomenon of part of the material covered by bad film, the film recovery rate is high, and the subsequent recycling of heavy materials is convenient; third, large pieces of film and small film are effectively recovered, and the recovery is complete, which is convenient for the reuse of various types of sorted materials; fourth, the garbage packaging bag is fixed at a specific position of the conveyor belt and moves with it. There is no longitudinal movement or lateral movement during cutting, and there is no turning over. In the rotating state, the packaging bag is completely cut into several thin slices, and the scales form a rigid and bendable annular carrier belt, that is, it has the flexibility of a belt and can bend and rotate continuously. At the same time, it has rigidity in a straight line state and can carry the packaging bag. When carrying the packaging bag, there is no lower bending state, thus avoiding the situation where the packaging bag is missed and not cut; fifthly, multiple groups of upper bag opening knives reciprocate to break the bag in a straight line, and can cut several packaging bags at the same time, with fast production speed and greatly reduced labor use. Several upper bag opening knives in the same row cut the packaging bag in two directions, which can form plane tearing and have a better cutting effect.

[0012] In some embodiments, a fixed knife groove is provided on the side of the vertical knife handle of the auxiliary crushing knife, and the fixed knife groove is threadedly connected to the lower auxiliary knife. The vertical knife handle is vertically fixed on the flat carrier plate of the scale plate, and the longitudinally adjacent vertical knife handles are respectively attached to the longitudinal baffles, and the longitudinal baffles are vertically connected to the flat carrier plate.

[0013] In some embodiments, the upper end of the chain plate of each link of the load-bearing chain extends vertically inward to form an upper ear plate, and two upper ear plates facing each other longitudinally are connected to the lower ends of the flat load plate by screws;

[0014] The two side baffles of the scale plate are respectively vertically connected to the two longitudinal end surfaces of the flat carrier plate;

[0015] The lower surface of the transverse shell plate of the upper cover assembly is matched with the longitudinal baffle plate with a small gap, and the outer surface of the transverse shell plate is located inside the side baffle plate;

[0016] Each flat carrier plate is also provided with longitudinal arc protrusions at both ends, and adjacent longitudinal arc protrusions can be movably overlapped or opened up and down.

[0017] In some embodiments, the two main shafts of the upper knife group are rotatably connected to the two ends of the inner wall of the knife holder through the first seat bearings, each main shaft is connected to the driving motor above through the transmission assembly, and a plurality of first sprockets are symmetrically arranged at equal intervals on the two main shafts, one main shaft is fixedly connected to the first sprockets in the odd-numbered rows and is rotatably connected to the first sprockets in the even-numbered rows, and the other main shaft is rotatably connected to the first sprockets in the odd-numbered rows and is fixedly connected to the first sprockets in the even-numbered rows, and the upper cutting edges of the upper bag opening knives in adjacent rows are in opposite or identical directions.

[0018] The upper ends of the two sides of the knife seat of the upper bag opening knife are symmetrically threaded to connect the lower ends of the two upper connecting plates, and the upper ends of the two upper connecting plates are connected to the two chain plates of a section of the load chain; the rear end of the upper cutting blade is connected to one side of the lower end of the knife seat,

[0019] Or the rear end of the guide protection plate is connected to the lower surface of the horizontal end beam of the tool holder.

[0020] In some embodiments, the separation roller includes a cylindrical roller body, a plurality of annular separation grooves are evenly spaced on the circumferential wall of the roller body, the roller body is located below the longitudinal baffle, and both ends of the central through hole of the roller body are fixedly connected to the first rotating shaft through two expansion sleeves.

[0021] The two ends of the first rotating shaft are connected to the two side connecting plates through two-disc second seat bearings. The two side connecting plates are fixed under the main beam. An extended end of the first rotating shaft is connected to the separation driving part.

[0022] In some embodiments, the positive and negative pressure separator includes a separation plate, a vertical first flange, and a second flange;

[0023] The outer wall of the isolation shaft of the isolation plate is integrally formed to connect the two sub-plates, and two small-sized positioning columns are formed at both ends of the isolation shaft.

[0024] The two positioning columns are fixedly connected to the first passive shaft and the first active shaft respectively, and the two dividing plates are fixedly connected to the inner wall of the rotating suction and release tube;

[0025] The rotating suction and discharge tube and the two end walls of the two split plates are both sealed and attached to the inner walls of the first flange and the second flange, so that the rotating suction and discharge tube forms a first inner cavity and a second inner cavity;

[0026] The inner ends of the first passive shaft and the first active shaft are respectively sleeve-sealed in the central through holes of the first flange and the second flange, so that the first inner cavity and the second inner cavity can rotate relative to the first flange and the second flange;

[0027] The outer end of the first passive shaft and the middle section of the first active shaft are rotatably connected to the two side connecting plates through the third seat bearing, and the extended section of the first active shaft is connected to the separation drive part;

[0028] The first flange is provided with a longitudinal negative pressure through hole near the feed end and a longitudinal positive pressure through hole near the discharge end.

[0029] In some embodiments, the air inlet port of the fan is connected to the large-diameter port of the variable-diameter flange pipe through the exhaust pipe, and the small-diameter port of the variable-diameter flange pipe is connected to the negative pressure through hole.

[0030] The air outlet of the fan is provided with a main ventilation duct, which is respectively connected to the first air supply duct and the second air supply duct. The first air supply duct is connected to the positive pressure through hole through an equal-diameter flange pipe, and the second air supply duct is connected to the air nozzle.

[0031] In some embodiments, the brush roller is located in front of the separation roller, the first passive wheel sleeve is connected to the extended end of the second rotating shaft, and the first passive wheel and the first motor wheel are connected by a first annular member.

[0032] The separation motor of the separation driving unit is fixed to the outer side of a main beam through a motor seat, and the motor shaft of the separation motor is connected to the second motor wheel and the first motor wheel by a shaft sleeve arranged side by side;

[0033] The second passive wheel sleeve is connected to the outwardly extending end of the first rotating shaft, the third passive wheel sleeve is connected to the outwardly extending end of the driving shaft, and the second annular member surrounds the second motor wheel, the second passive wheel and the third passive wheel.

[0034] In some embodiments, two ends of the two load-bearing chains respectively wrap around four second sprockets that are drive-connected to the main drive unit; two second sprockets are symmetrically fixed on the second driving shaft and the second driven shaft of the main drive unit;

[0035] The second driving shaft is rotatably connected to the rear ends of the two main beams through the fifth seat bearing, and the end of the second driving shaft is connected to the main motor through a coupling;

[0036] The second passive shaft passes through the avoidance holes of the two main beams and is sleeved on the bearing with a slider seat on the outer side of the front end of the two main beams. The rear end of the bearing with a slider is threadedly connected to the tensioning screw, and two adjusting nuts are connected to the tensioning screw.

[0037] Two C-shaped tensioning guide seats are fixed on the outer side surfaces of the front ends of the two main beams, the tensioning screw passes through the vertical adjustment plate of the tensioning guide seat, the two adjustment nuts fit the vertical adjustment plate, and the two guide strips with slider seat bearings are respectively connected to the horizontal flat plates of the tensioning guide seat.

[0038] In some embodiments, the feed hopper of the upper cover assembly is located above the front end of the main beam, and the feed hopper is connected to the front end of two transverse shell plates of the upper cover assembly. The two transverse shell plates are fixed to the upper surface of the main beam through a number of side legs; the two transverse shell plates are also rotatably connected to the material removal rollers near the front end. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1A three-dimensional schematic diagram of a bag opening machine according to an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A three-dimensional schematic diagram of the conveyor belt and the main drive unit shown;

[0041] Figure 3 for Figure 2 A three-dimensional schematic diagram of the auxiliary crushing knife and the scale plate shown;

[0042] Figure 4 for Figure 1 A three-dimensional schematic diagram of the upper knife assembly shown;

[0043] Figure 5 for Figure 4 A three-dimensional schematic diagram of the conveyor belt and the main drive unit shown;

[0044] Figure 6 for Figure 4 A three-dimensional schematic diagram of the conveyor belt and the main drive unit shown;

[0045] Figure 7 for Figure 1 A three-dimensional schematic diagram of a membrane separator, a positive and negative pressure separator, a brush roller and a main drive unit is shown;

[0046] Figure 8 for Figure 7 A three-dimensional schematic diagram of the membrane separator shown;

[0047] Fig. 9 for Figure 7 A three-dimensional schematic diagram of the positive and negative pressure separator shown;

[0048] Fig.10 for Fig. 9 A cross-sectional schematic diagram of a positive and negative pressure separator is shown;

[0049] Fig.11 for Fig.10 A three-dimensional schematic diagram of the rotating suction and discharge tube and the isolation plate shown;

[0050] Fig.12 for Figure 1 A three-dimensional schematic diagram of the upper cover assembly shown;

[0051] Lower frame 00, main beam 001, material chute 002, air nozzle 003, short leg 004, long leg 005;

[0052] Conveyor belt 01, scale plate 010, flat carrier plate 0100, longitudinal baffle 0101, side baffle 0102, longitudinal arc protrusion 0103, load-bearing chain 011, upper ear plate 0111;

[0053] Auxiliary crushing knife 02, lower auxiliary knife 021, vertical knife handle 022, fixed knife groove 0221;

[0054] Upper knife group 03, drive motor 1, spindle 2, load chain 3, knife holder 4, upper bag opening knife 5, upper cutting blade 50, knife seat 51, upper connecting plate 52, transmission assembly 6, first sprocket wheel 7, guide protection plate 8;

[0055] Thin film separator 04, separation roller 040, roller body 0400, separation groove 0401, central through hole 0402, first rotating shaft 041, second seat bearing 042, expansion sleeve 043, side connecting plate 044;

[0056] Positive and negative pressure separator 05, rotating suction and discharge pipe 051, isolation plate 052, isolation shaft 0520, separation plate 0521, positioning column 0522, first passive shaft 053, first active shaft 054, fan 055, exhaust pipe 0551, main ventilation pipe 0552, first air supply pipe 0553, second air supply pipe 0554, first flange 056, negative pressure through hole 0561, positive pressure through hole 0562, second flange 057, third seat bearing 058;

[0057] Separation drive unit 06, first motor wheel 061, second motor wheel 062, second passive wheel 063, third passive wheel 064, first annular member 065, second annular member 066, motor seat 067, separation motor 068, first passive wheel 069;

[0058] Main drive unit 07, main motor 070, second driving shaft 071, second driven shaft 072, second sprocket 073, fifth seat bearing 074, coupling 075, seat bearing with slider 076, tensioning screw 077, adjusting nut 078, tensioning guide seat 079;

[0059] Upper cover assembly 08, feed hopper 080, transverse shell plate 081, side legs 082, material feeding roller 083;

[0060] Brush roller 09 , second rotating shaft 091 , fourth seat bearing 092 , bristles 093 . DETAILED DESCRIPTION

[0061] The present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0062] Figures 1 to 12A bag opening machine according to an embodiment of the present invention is schematically shown. As shown in the figure, the device includes a conveyor belt 01, an auxiliary crushing knife 02, an upper knife group 03, a film separator 04, a positive and negative pressure separator 05 and a lower frame 00;

[0063] An upper cover assembly 08 of a shell structure with upper and lower openings is installed above the two parallel main beams 001 of the lower frame 00, a material discharge chute 002 is installed below the rear end discharge port of the main beam 001, and a tuyere 003 is provided above the rear baffle of the material discharge chute 002;

[0064] The two ring-shaped load-bearing chains 011 of the conveyor belt 01 are driven to rotate by the main driving part 07 and are symmetrically distributed in the two main beams 001. Each link of the load-bearing chain 011 is fixed with a scale plate 010, and all scale plates 010 are attached front and back to form a ring-shaped load-bearing belt;

[0065] A plurality of auxiliary crushing knives 02 are installed in a rectangular array on the scale plate 010. The blade of the lower auxiliary knife 021 of the auxiliary crushing knife 02 is opposite to the moving direction of the conveyor belt 01. The longitudinally adjacent auxiliary crushing knives 02 are respectively attached to the longitudinal baffle 0101 of the scale plate 010. The lower auxiliary knife 021 fixes the packaging bag and passively cuts the bottom of the packaging bag.

[0066] The knife holder 4 of the upper knife group 03 is connected to the inner wall of the upper cover assembly 08, and two driving motors 1 are respectively fixed on both ends of the knife holder 4. A plurality of load chains 3 are arranged at equal intervals in the knife holder 4. The two driving motors 1 respectively drive the load chains 3 of the odd rows and the even rows to rotate in opposite directions. A plurality of upper bag opening knives 5 are connected at equal intervals under each load chain 3. The upper bag opening knives 5 and the lower auxiliary knife 021 cooperate with each other to tear and cut the packaging bag in two directions.

[0067] The film separator 04 is located at the front open end of the material discharge chute 002. The separation roller 040 of the film separator 04 is rotatably connected under the main beam 001. The separation roller 040 is provided with a plurality of separation grooves 0401 which are clearance-matched with the lower auxiliary knife 021. Under the blowing of the air nozzle 003, the light film is brought into the separation groove 0401 by the lower auxiliary knife 021 for secondary bag breaking and is separated by rotation.

[0068] The positive and negative pressure separator 05 is located below the film separator 04. A number of suction and release holes are evenly distributed on the rotating suction and release tube 051 of the positive and negative pressure separator 05. When facing the air nozzle 003, the suction and release holes absorb the fine film; and the suction and release holes on the other side release the fine film.

[0069] The working principle of this bag opening machine is:

[0070] First, manually or mechanically put the domestic garbage packed in the packaging bag into the feed hopper 080 at the front end of the upper cover assembly 08, and feed evenly;

[0071] Second, the conveyor belt 01 transports the packaging bag forward, and assists the crushing knife 02 and the longitudinal baffle 0101 to fix the moving packaging bag;

[0072] Third, the upper knife group 3 reciprocates in a straight line, and a plane is formed between the upper knife groups 3, and the upper knife group 3 and the lower auxiliary knife 021 form an upper and lower tearing and cutting, so that multiple surfaces of the packaging bag are cut into multiple film sheets, and the scattered materials continue to be transported to the discharge port;

[0073] Fourth, heavy materials directly slide into the next process from the discharge chute 002, and the air nozzle 003 blows the film sheet from the separation roller 040 of the film separator 04 into the film collection area. At the same time, the materials and packaging bags that are not completely torn apart enter the surface of the separation roller 040 from the lower auxiliary knife 021, and are broken for the second time under the interaction of the separation chute 0401 and the lower auxiliary knife 021. The materials fall back into the discharge chute 002, and the film enters the film collection area along with the separation roller 040;

[0074] Fifth, during the bag breaking process, some small light films will be generated. The floating and sinking small films are adsorbed on the surface of the rotating suction and discharge tube 051 by the positive and negative pressure separator 05. The small films rotate with the rotating suction and discharge tube 051 to the positive pressure area and are separated by negative pressure to the film collection area;

[0075] A brush can also be provided at the lower end to clean the lower auxiliary knife 021 .

[0076] This bag opening machine realizes the movement of materials at a fixed position. The upper knife group 3 and the lower auxiliary knife 021 break the bags alternately up and down. The separation groove 0401 and the lower auxiliary knife 021 break the bags twice, so that the packaging bags are completely broken. The large pieces of film are recovered by the separation roller 040, and the positive and negative pressure separator 05 recovers the fine film, so that the film material is fully recovered and the heavy substances are separated. Its beneficial effects are: first, the bag breaking speed is fast and the production efficiency is high, which reduces the workers working in harsh environments and protects the health of workers; second, the packaging bags are completely broken through staggered cutting and secondary cutting, and the bag breaking effect is good. There is no mixing phenomenon of part of the material covered by bad film, the film recovery rate is high, and the subsequent recovery of heavy materials is convenient; third, large pieces of film and fine film are effectively recovered, and the recovery is complete, which is convenient for the reuse of various types of sorted materials; fourth, the garbage packaging bag is fixed at a specific position of the conveyor belt 01 and moves with it. There is no longitudinal movement or lateral movement during cutting, and there is no flipping. , the packaging bag is completely cut into several thin slices, and the scale plate 010 forms a rigid and bendable annular carrier belt, that is, it has the flexibility of a belt and can bend and rotate continuously. At the same time, it has rigidity in a straight state and can carry the packaging bag. When carrying the packaging bag, there is no lower bending state, which avoids the situation where the packaging bag is missed and not cut; fifthly, multiple groups of upper bag opening knives 5 reciprocate to break the bag in a straight line, and can cut several packaging bags at the same time, with fast production speed and greatly reduced labor use. Several upper bag opening knives 5 in the same row cut the packaging bag in two directions, which can form tearing on the plane, and the cutting effect is better.

[0077] Preferably, the upper side of the vertical blade handle 022 of the auxiliary crushing blade 02 is provided with a fixed blade groove 0221, the fixed blade groove 0221 and the rear end of the lower auxiliary blade 021 are plugged and matched and connected by a threaded member, the vertical blade handle 022 is vertically fixed on the flat carrier plate 0100 of the scale plate 010, and the side surfaces of the vertically adjacent vertical blade handles 022 are respectively attached to the side surfaces of the longitudinal baffle 0101, and the longitudinal baffle 0101 is vertically connected to the flat carrier plate 0100. The beneficial effect is that the fixed blade groove 0211 can install the blade with high precision, which is convenient for assembly and disassembly.

[0078] Preferably, the vertical knife handle 022 and the flat carrier plate 0100 are threadedly connected or welded into one;

[0079] Preferably, the longitudinal baffle 0101 is an angle steel or a right-angle bending part, and the lower flat plate of the longitudinal baffle 0101 and the flat carrier plate 0100 are threadedly connected or welded into one. The beneficial effect is that the longitudinal baffle 0101 has a good limiting packaging bag effect.

[0080] Preferably, the upper end of the chain plate of each link of the load-bearing chain 011 extends vertically inward to form an upper ear plate 0111, and the two longitudinally opposite upper ear plates 0111 and the lower ends of the flat carrier plate 0100 are connected by threaded parts; the beneficial effect is that the upper ear plate 0111 can accurately position the scale plate 010 and fix it at the same height, so that the annular carrier belt has good flatness.

[0081] The two side baffles 0102 of the scale plate 010 are respectively connected vertically to the longitudinal end surface of the flat carrier plate 0100; the lower surface of the transverse shell plate 081 of the upper cover assembly 08 is matched with the longitudinal baffle 0101 with a small gap, and the outer surface of the transverse shell plate 081 is located inside the side baffle 0102. The beneficial effect is that the side baffle 0102 can prevent the garbage material from overflowing from the side surface of the machine and damaging the production equipment and the environment, realize the sealed bag breaking, and completely process the material.

[0082] Preferably, each flat carrier plate 0100 is provided with longitudinal arc protrusions 0103 at both ends, and adjacent longitudinal arc protrusions 0103 can be movably overlapped and connected together and open when bent. The beneficial effect is that the longitudinal arc protrusions 0103 can effectively seal the upper and lower surfaces, prevent the garbage materials from overflowing from the side surface of the machine and damaging the production equipment and the environment, realize sealed bag breaking, and completely process the materials.

[0083] Preferably, the two main shafts 2 of the upper knife group 03 are rotatably connected to the two ends of the inner wall of the knife holder 4 through the first seat bearings respectively, and each main shaft 2 is connected to the driving motor 1 above through the transmission assembly 6 respectively. A plurality of first sprocket wheels 7 are symmetrically arranged at equal intervals on the two main shafts 2. One main shaft 2 is fixedly connected to the first sprocket wheels 7 of the odd-numbered rows and is rotatably connected to the first sprocket wheels 7 of the even-numbered rows, and the other main shaft 2 is rotatably connected to the first sprocket wheels 7 of the odd-numbered rows and is fixedly connected to the first sprocket wheels 7 of the even-numbered rows, so that one main shaft 2 drives the load chains 3 of the odd-numbered rows to rotate in the same direction and the other main shaft 2 drives the load chains 3 of the even-numbered rows to rotate in the same direction, and the load chains 3 of adjacent rows rotate in opposite directions; the upper cutting edges 50 of the upper bag opening knives 5 of adjacent columns are in opposite or same directions,

[0084] The upper bag opening knife 5 includes a rectangular plate-shaped knife seat 51, and the upper ends of the two side surfaces of the knife seat 51 are symmetrically threadedly connected to the lower ends of two upper connecting plates 52, and the upper ends of the two upper connecting plates 52 are connected to two chain plates of a section of the load chain 3; the rear end of the upper cutting blade 50 is integrally connected or threadably connected to one side of the lower end of the knife seat 51, and the front end of the upper cutting blade 50 is sharp and needle-shaped, and its beneficial effect is: the upper bag opening knife 5 is easy to assemble and disassemble, and is convenient for maintenance.

[0085] Preferably, the first sprocket 7 includes a driving sprocket and a driven sprocket. The driving sprocket is fixed to the main shaft 2 via a key connection or a tightening sleeve; the driven sprocket is rotatably connected to the main shaft 2 via a bearing.

[0086] The driving motor 1 is longitudinally arranged and fixed on the motor plate, and the two ends of the motor plate are fixed to the ends of the horizontal end beam of the tool holder 4 through the heightening plates.

[0087] A longitudinal oblong hole is arranged in the middle of the motor plate, and the annular member vertically passes through the longitudinal oblong hole. The beneficial effect is that the arrangement facilitates the installation of the drive motor 1 and effectively protects the drive motor 1 from being polluted by garbage.

[0088] Preferably, the transverse end beam is a C-shaped bent plate or channel steel.

[0089] Preferably, the transmission assembly 6 includes a motor wheel, a driving wheel, and an annular member located in the same vertical plane, the motor wheel and the driving wheel are sprockets or pulleys, and the annular member is an annular chain or an annular belt; the motor wheel is fixed to the driving motor 1 through a key bar, the driving wheel is fixed to the main shaft 2 through a key bar, and the motor wheel and the driving wheel are meshed and enclosed in the annular member. The beneficial effect is that the driving assembly has good transmission efficiency and a simple structure.

[0090] Preferably, the transmission assembly 6 is any one of a chain transmission system, a common belt transmission system and a synchronous belt transmission system;

[0091] Preferably, the driving motor 1 is a servo motor or a stepper motor; the beneficial effect is that the setting has better transmission accuracy, accurately controls the cutting speed, and ensures the best cutting effect.

[0092] Preferably, the rear end of the guide protection plate 8 is connected to the lower surface of the horizontal end beam of the tool holder 4, and the guide protection plate 8 is an arc-shaped curved plate whose height gradually decreases from the front end to the rear end. Its beneficial effect is that the guide protection plate 8 is conducive to the packaging bag passing from the predetermined lower end, preventing the packaging bag from entering the upper chain position, and at the same time, the large volume of material is compressed again by the arc-shaped guide protection plate 8, so that the large volume of material can smoothly enter the bag breaking section.

[0093] Preferably, the separation roller 040 includes a cylindrical nylon roller body 0400, the circumferential wall of the roller body 0400 is provided with a plurality of annular separation grooves 0401 at equal intervals, the roller body 0400 is located below the longitudinal baffle 0101, and the two ends of the central through hole 0402 of the roller body 0400 and the first rotating shaft 041 are fixedly connected by two expansion sleeves 043, and the beneficial effects are: the expansion sleeve 043 is easy to connect and install, and the connection is firm, while reducing the processing accuracy of the first rotating shaft 041 and the separation roller 040, and the processing is convenient and the cost is low.

[0094] The two ends of the first rotating shaft 041 are connected to two side connecting plates 044 through two second bearings with seats 042. The two side connecting plates 044 are fixed under the main beam 001. One extended end of the first rotating shaft 041 is connected to the separation driving part 06.

[0095] Preferably, the gap between the groove wall of the separation groove 0401 and the left and right sides and the upper surface of the lower auxiliary knife 021 is 1-5 mm. The beneficial effect is that the gap can achieve a good bag breaking effect and prevent the blade and the groove body from being blocked.

[0096] Preferably, the positive and negative pressure separator 05 comprises an isolation plate 052, a vertical first flange 056 and a second flange 057;

[0097] The outer wall of the isolation shaft 0520 of the isolation plate 052 is integrally formed to connect the two sub-plates 0521, and two small-sized positioning columns 0522 are formed at both ends of the isolation shaft 0520.

[0098] The two positioning posts 0522 are fixedly connected to the central blind holes of the first passive shaft 053 and the first active shaft 054 respectively, and the two dividing plates 0521 are fixedly connected to the inner wall of the rotating suction and discharge tube 051, so that the rotating suction and discharge tube 051, the isolation plate 052, the first passive shaft 053 and the first active shaft 054 become a rotating body;

[0099] The rotating suction and discharge tube 051 and the two end walls of the two split plates 0521 are both sealed and attached to the inner walls of the first flange 056 and the second flange 057, so that the rotating suction and discharge tube 051 forms a first inner cavity and a second inner cavity;

[0100] The inner ends of the first passive shaft 053 and the first active shaft 054 are respectively sleeve-sealed in the central through holes of the first flange 056 and the second flange 057, so that the first inner cavity and the second inner cavity can rotate relative to the first flange 056 and the second flange 057;

[0101] The outer end of the first passive shaft 053 and the middle section of the first active shaft 054 are rotatably connected to the two side connecting plates 044 through the third seat bearing 058, and the extended section of the first active shaft 054 is connected to the separation driving part 06;

[0102] The first flange 056 is provided with a longitudinal negative pressure through hole 0561 near the feeding end and a longitudinal positive pressure through hole 0562 near the discharging end. The first inner cavity and the second inner cavity are alternately connected to the negative pressure through hole 0561 and the positive pressure through hole 0562, that is, alternately become a positive pressure cavity and a negative pressure cavity. The beneficial effect is that the device is small in size and can be directly installed at the discharging end of the bag opening machine, which is convenient for maintenance, and the small film can be recovered in time without entering the subsequent process.

[0103] Preferably, the air inlet port of the fan 055 is connected to the large-diameter port of the reducer flange pipe through the exhaust pipe 0551, and the small-diameter port of the reducer flange pipe is connected to the negative pressure through hole 0561.

[0104] The air outlet of the fan 055 is provided with a main ventilation pipe 0552, which is respectively connected to the first air supply pipe 0553 and the second air supply pipe 0554, the first air supply pipe 0553 is connected to the positive pressure through hole 0562 through an equal-diameter flange pipe, and the second air supply pipe 0554 is connected to the air nozzle 003. The beneficial effect is that the arrangement enables one fan 055 to meet the air supply arrangement and the vacuuming requirement at the same time, with a delicate structure and a reduced number of fans 055.

[0105] Preferably, a positioning ring is formed on the inner side of the first flange 056 and the second flange 057, and the positioning ring fits with the two end holes of the rotating suction and discharge tube 051 or rotates through a bearing. The beneficial effect is that the positioning ring can effectively improve the positioning accuracy of the first flange 056 and the second flange 057, so that the rotating suction and discharge tube 051 can rotate stably with high precision relative to the first flange 056 and the second flange 057.

[0106] The central through hole is a stepped through hole, and the outer step hole diameter of the stepped through hole is larger than the inner step hole diameter; the positioning column 0522 and the inner step hole have the same diameter and are matched with a small clearance, and the first passive shaft 053 and the first active shaft 054 are connected to the outer step hole by a bearing with a sealing end cover. The beneficial effect is that this setting can improve the sealing of the two inner cavities.

[0107] Preferably, a vacuum rubber seal ring is also provided inside the bearing. The beneficial effect is that the structure can significantly improve the vacuum degree of the two inner cavities and further improve the adsorption efficiency.

[0108] Preferably, the brush roller 09 is located in front of the separation roller 040, the second rotating shaft 091 of the brush roller 09 is rotatably connected to the bottom of the main beam 001 through the fourth seat bearing 092, the bristles 093 of the brush roller 09 are higher than the lower auxiliary knife 021, the first passive wheel 069 sleeve is connected to the protruding end of the second rotating shaft 091, and the first passive wheel 069 and the first motor wheel 061 are connected by the first annular member 065. The beneficial effect is that the brush roller 09 can clean the impurities on the lower auxiliary knife 021, so that the lower auxiliary knife 021 can maintain good and efficient cutting every time.

[0109] The separation motor 068 of the separation driving unit 06 is fixed to the outer side of a main beam 001 through a motor seat 067, and the motor shaft of the separation motor 068 is connected to the second motor wheel 062 and the first motor wheel 061 in parallel with the shaft sleeve;

[0110] The shaft sleeve of the second passive wheel 063 is connected to the protruding end of the first rotating shaft 041, the shaft sleeve of the third passive wheel 064 is connected to the protruding end of the first driving shaft 054, and the second annular member 066 is wrapped around the second motor wheel 062, the second passive wheel 063 and the third passive wheel 064; its beneficial effect is that the brush roller 09, the separation roller 040 and the positive and negative pressure separator share a separation motor 60, saving the number of motors.

[0111] Preferably, the separation drive unit 06 is any one of a chain drive system, a common belt drive system and a synchronous belt drive system. Its beneficial effects are: according to different loads and speeds, the corresponding transmission mode can be selected, the equipment is convenient to configure, the equipment is highly versatile, and the application range is wide.

[0112] Preferably, the two ends of the two load-bearing chains 011 respectively wrap around the four second sprockets 073 drivingly connected to the main drive unit 07; two second sprockets 073 are symmetrically fixed on the second driving shaft 071 and the second passive shaft 072 of the main drive unit 07; the second driving shaft 071 is rotatably connected to the rear ends of the two main beams 001 through the fifth seat bearing 074, and the end of the second driving shaft 071 is connected to the main motor 070 through the coupling 075;

[0113] The second passive shaft 072 passes through the avoidance holes of the two main beams 001 and is sleeved on the outer side of the front end of the two main beams 001 through the bearing 076 with a slider seat. The rear end of the bearing 076 with a slider is threadedly connected to the tensioning screw 077, and the tensioning screw 077 is connected to two adjusting nuts 078.

[0114] Two C-shaped tensioning guide seats 079 are fixed on the outer side surfaces of the front ends of the two main beams 001. The tensioning screw 077 passes through the vertical adjustment plate of the tensioning guide seat 079. The two adjusting nuts 078 fit the vertical adjustment plate. The beneficial effect is that the tensioning screw 077 can adjust the tightness of the conveyor belt 01 and the load-bearing chain to enter the most reasonable movement state.

[0115] The two guide strips with the slider seat bearing 076 are respectively connected to the transverse flat plate of the tensioning guide seat 079. Its beneficial effect is that the guide structure makes the tensioning adjustment have good controllability.

[0116] Preferably, the feed hopper 080 of the upper cover assembly 08 is located above the front end of the main beam 001, and the feed hopper 080 is connected to the front ends of two transverse shell plates 081 of the upper cover assembly 08, and the two transverse shell plates 081 are fixed to the upper surface of the main beam 001 through a plurality of side legs 082;

[0117] The two transverse shell plates 081 are also rotatably connected to the material-pickup roller 083 near the front end. Its beneficial effect is that the material-pickup roller 083 can evenly feed the material into the endless conveyor belt.

[0118] Preferably, the upper and lower surfaces and the front side of the material discharge chute 002 are all open, and the discharge port of the lower frame 00 and the end of the conveyor belt 01 are located directly above the upper opening of the material discharge chute 002.

[0119] Preferably, the feed hopper 080 is a structure with a rectangular opening gradually increasing from bottom to top, and a hinge plate that can be opened counterclockwise is provided at the lower end of the front side plate of the feed hopper 080, and the auxiliary crushing knife 02 and the longitudinal baffle 0101 can push the hinge plate into the bottom of the feed hopper 080. The beneficial effect is that the feed hopper 080 is arranged to facilitate uniform feeding.

[0120] Preferably, short legs 004 are installed under the front ends of the two main beams 001, long legs 005 are installed under the rear ends, and reinforcing legs are installed under the middle.

[0121] Preferably, the main beam 001 is an I-beam steel.

[0122] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A bag opening machine, characterized in that: It comprises a conveyor belt (01), an auxiliary crushing knife (02), an upper knife group (03), a film separator (04), a positive and negative pressure separator (05) and a lower frame (00); An upper cover assembly (08) of a shell structure with upper and lower openings is installed above the two parallel main beams (001) of the lower frame (00); a material discharge chute (002) is installed below the rear end discharge port of the main beam (001); and a tuyere (003) is provided above the rear baffle of the material discharge chute (002); The two ring-shaped load-bearing chains (011) of the conveyor belt (01) are driven to rotate by the main driving part (07) and are symmetrically distributed in the two main beams (001); each link of the load-bearing chain (011) is fixed with a scale plate (010), and all the scale plates (010) are attached front and back to form a ring-shaped load-bearing belt; A plurality of auxiliary crushing knives (02) are installed in a rectangular array on the scale plate (010), the blade of the lower auxiliary knife (021) of the auxiliary crushing knife (02) moves in the opposite direction to the conveyor belt (01), the longitudinally adjacent auxiliary crushing knives (02) are respectively attached to the longitudinal baffle (0101) of the scale plate (010), and the lower auxiliary knife (021) fixes the packaging bag and passively cuts the bottom of the packaging bag; The knife holder (4) of the upper knife group (03) is connected to the inner wall of the upper cover component (08); two driving motors (1) are respectively fixed to the two ends of the knife holder (4); a plurality of load chains (3) are arranged at equal intervals in the knife holder (4); the two driving motors (1) respectively drive the load chains (3) in odd rows and even rows to rotate in opposite directions; a plurality of upper bag opening knives (5) are connected at equal intervals under the load chains (3); the upper bag opening knives (5) and the lower auxiliary knife (021) cooperate with each other to tear and cut the packaging bag in two directions; The film separator (04) is located at the front open end of the material discharge chute (002). The separation roller (040) of the film separator (04) is rotatably connected under the main beam (001). The separation roller (040) is provided with a plurality of separation grooves (0401) which are clearance-matched with the lower auxiliary knife (021). Under the blowing of the air nozzle (003), the light film is brought into the separation groove (0401) by the lower auxiliary knife (021) for secondary bag breaking and is separated by rotation. The positive and negative pressure separator (05) is located below the film separator (04), and a plurality of suction and release holes are evenly distributed on the rotating suction and release tube (051) of the positive and negative pressure separator (05). When facing the air nozzle (003), the suction and release holes absorb the fine film; on the other side, the suction and release holes release the fine film; The separation roller (040) comprises a cylindrical roller body (0400), a circumferential wall of the roller body (0400) being provided with a plurality of annular separation grooves (0401) at equal intervals, the roller body (0400) being located below the longitudinal baffle (0101), and two ends of a central through hole (0402) of the roller body (0400) being fixedly connected to the first rotating shaft (041) via two expansion sleeves (043). The two ends of the first rotating shaft (041) are connected to two side connecting plates (044) via two second seat bearings (042); the two side connecting plates (044) are fixed under the main beam (001); and an extended end of the first rotating shaft (041) is connected to a separation driving unit (06); The positive and negative pressure separator (05) comprises an isolation plate (052), a vertical first flange (056) and a second flange (057); The outer wall of the isolation shaft (0520) of the isolation plate (052) is integrally formed to connect the two sub-plates (0521), and two small-sized positioning columns (0522) are formed at both ends of the isolation shaft (0520). The two positioning columns (0522) are respectively fixedly connected to the first passive shaft (053) and the first active shaft (054), and the two dividing plates (0521) are fixedly connected to the inner wall of the rotating suction and release tube (051); The two end walls of the rotating suction and discharge tube (051) and the two dividing plates (0521) are both sealed and attached to the inner walls of the first flange (056) and the second flange (057), so that the rotating suction and discharge tube (051) forms a first inner cavity and a second inner cavity; The inner ends of the first passive shaft (053) and the first active shaft (054) are respectively sleeve-sealed in the central through holes of the first flange (056) and the second flange (057), so that the first inner cavity and the second inner cavity can rotate relative to the first flange (056) and the second flange (057); The outer end of the first passive shaft (053) and the middle section of the first active shaft (054) are rotatably connected to the two side connecting plates (044) via third seat bearings (058), and the extended section of the first active shaft (054) is connected to the separation drive unit (06); The first flange (056) is provided with a longitudinal negative pressure through hole (0561) near the feed end and a longitudinal positive pressure through hole (0562) near the discharge end; Two ends of the two load-bearing chains (011) respectively wrap around and drive four second sprockets (073) connected to the main drive unit (07); Two second sprockets (073) are symmetrically fixed on the second driving shaft (071) and the second driven shaft (072) of the main driving part (07); The second driving shaft (071) is rotatably connected to the rear ends of the two main beams (001) via a fifth seat bearing (074); the end of the second driving shaft (071) is connected to the main motor (070) via a coupling (075); The second passive shaft (072) passes through the avoidance through holes of the two main beams (001) and is sleeved on a bearing (076) with a slider seat on the outer side surfaces of the front ends of the two main beams (001). The rear end of the bearing (076) with a slider seat is threadedly connected to a tensioning screw (077). Two adjusting nuts (078) are connected to the tensioning screw (077). Two tensioning guide seats (079) of C-shaped structures are fixed to the outer side surfaces of the front ends of the two main beams (001); the tensioning screw (077) passes through the vertical adjustment plate of the tensioning guide seat (079); the two adjustment nuts (078) are fitted to the vertical adjustment plate; and the two guide strips with the slider seat bearing (076) are respectively connected to the transverse flat plate of the tensioning guide seat (079).

2. A bag opening machine according to claim 1, characterized in that: A fixed knife groove (0221) is provided on the side of the vertical knife handle (022) of the auxiliary crushing knife (02), and the fixed knife groove (0221) and the lower auxiliary knife (021) are threadedly connected. The vertical knife handle (022) is vertically fixed on the flat carrier plate (0100) of the scale plate (010), and the vertically adjacent vertical knife handles (022) are respectively attached to the longitudinal baffle plate (0101), and the longitudinal baffle plate (0101) is vertically connected to the flat carrier plate (0100).

3. A bag opening machine according to claim 2, characterized in that: The upper end of the chain plate of each link of the load-bearing chain (011) extends vertically inward to form an upper ear plate (0111), and the two upper ear plates (0111) and the two ends of the flat load plate (0100) that are longitudinally opposite to each other are connected by screws; The two side baffles (0102) of the scale plate (010) are respectively vertically connected to the two longitudinal end surfaces of the flat carrier plate (0100); The lower surface of the transverse shell plate (081) of the upper cover assembly (08) is matched with the longitudinal baffle (0101) with a small gap, and the outer surface of the transverse shell plate (081) is located on the inner side of the side baffle (0102); Each of the flat carrier plates (0100) is also provided with longitudinal arc protrusions (0103) at both ends, and adjacent longitudinal arc protrusions (0103) can be movably overlapped or opened up and down.

4. A bag opening machine according to claim 1, characterized in that: The two main shafts (2) of the upper knife group (03) are rotatably connected to the two ends of the inner wall of the knife frame (4) through first seat bearings respectively; each of the main shafts (2) is connected to the driving motor (1) above through a transmission assembly (6); a plurality of first sprockets (7) are symmetrically arranged at equal intervals on the two main shafts (2); one of the main shafts (2) is fixedly connected to the first sprockets (7) of the odd-numbered rows and is rotatably connected to the first sprockets (7) of the even-numbered rows; the other main shaft (2) is rotatably connected to the first sprockets (7) of the odd-numbered rows and is fixedly connected to the first sprockets (7) of the even-numbered rows; the upper cutting edges (50) of the upper bag opening knives (5) in adjacent rows are in opposite or identical directions; The upper ends of the two side surfaces of the knife seat (51) of the upper bag opening knife (5) are symmetrically threadedly connected to the lower ends of two upper connecting plates (52), and the upper ends of the two upper connecting plates (52) are connected to the two chain plates of a section of the load chain (3); the rear end of the upper cutting blade (50) is connected to one side of the lower end of the knife seat (51). Or the rear end of the guide protection plate (8) is connected to the lower surface of the transverse end beam of the tool holder (4).

5. The bag opening machine according to claim 1, characterized in that: The air inlet port of the fan (055) is connected to the large-diameter port of the reducer flange pipe through the exhaust pipe (0551), and the small-diameter port of the reducer flange pipe is connected to the negative pressure through hole (0561). The air outlet port of the fan (055) is provided with a main ventilation duct (0552), and the main ventilation duct (0552) is respectively connected to a first air supply duct (0553) and a second air supply duct (0554), the first air supply duct (0553) is connected to the positive pressure through hole (0562) via an equal-diameter flange pipe, and the second air supply duct (0554) is connected to the air nozzle (003).

6. The bag opening machine according to claim 1, characterized in that: The brush roller (09) is located in front of the separation roller (040); the shaft sleeve of the first passive wheel (069) is connected to the outwardly extending end of the second rotating shaft (091); and the first passive wheel (069) and the first motor wheel (061) are connected in transmission via a first annular member (065); The separation motor (068) of the separation drive unit (06) is fixed to the outer side surface of one of the main beams (001) via a motor seat (067), and the motor shaft of the separation motor (068) is connected to the second motor wheel (062) and the first motor wheel (061) in parallel with the shaft sleeves; The shaft sleeve of the second passive wheel (063) is connected to the extended end of the first rotating shaft (041), the shaft sleeve of the third passive wheel (064) is connected to the extended end of the first driving shaft (054), and the second annular member (066) surrounds the second motor wheel (062), the second passive wheel (063) and the third passive wheel (064).

7. The bag opening machine according to claim 1, characterized in that: The feed hopper (080) of the upper cover assembly (08) is located above the front end of the main beam (001), and the feed hopper (080) is connected to the front ends of two transverse shell plates (081) of the upper cover assembly (08), and the two transverse shell plates (081) are fixed to the upper surface of the main beam (001) through a plurality of side legs (082); The two transverse shell plates (081) are also rotatably connected to the material-moving rollers (083) near the front ends.

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