Mechanical bag breaking device and method for bagged household garbage

Abstract

The invention discloses a mechanical bag breaking treatment device and method for bagged household garbage. The device comprises a machine body, and a feeding buffer area, a bag breaking area and a discharging buffer area are sequentially arranged in the machine body from top to bottom; the feeding buffer area is used for controlling the amount and speed of the bagged household garbage entering the machine body so as to play a buffering role; a cutter is arranged in the bag breaking area, and when the bagged household garbage enters the bag breaking area, the cutter in the bag breaking area conducts bag breaking treatment on the bagged household garbage in the bag breaking area through outward pulling, inserting and cutting edge rotating; the whole device is of a vertical structural design, graded bag breaking treatment is carried out in a bag breaking area through outward pulling and inserting of a mechanical cutter and rotation of a cutting edge, and the bag breaking efficiency and the success rate are effectively improved; soft substances hooked and wound on the bag breaking cutter are automatically stripped through the outward pulling process of the cutter, the step of shutdown cleaning of equipment is omitted, the operation failure rate of the equipment is remarkably reduced, and the reliability of continuous and stable operation of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the field of pretreatment of domestic waste, and in particular to a mechanized bag-breaking device and method for bagged domestic waste. Background Art

[0002] The treatment of domestic waste is an important part of urban and rural environmental governance. How to treat urban domestic waste at low cost and utilize it at high value is a long-term problem that every city needs to solve.

[0003] Batch mechanical bag breaking of bagged domestic waste is an essential pretreatment step for terminal treatment projects. There are two main types of common mechanized bag breaking devices: one is a drum screen with a bag breaking knife inside. The drum screen rotates to make the bagged domestic waste continuously fall from top to bottom onto the bag breaking knife. This bag breaking method is relatively passive, and there are problems such as incomplete bag breaking and the bag breaking knife being entangled and hooked, which is difficult to clean. The other is the extrusion and cutting bag breaking method, which mainly relies on belt knives or toothed rollers with opposite running directions and different running speeds to break the bagged garbage passing through its gap. This method is relatively active, but there are problems such as easy jamming and entanglement, and the fragile materials are crushed by the rollers, which is not conducive to the back-end sorting and resource utilization. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a device and method for mechanized bag breaking and processing of bagged domestic waste, aiming to release bagged domestic waste without residue and minimize the probability of breakage of fragile materials, thereby providing conditions for subsequent harmless treatment and resource utilization.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] In a first aspect, the present invention provides a mechanized bag-breaking device for bagged domestic waste, comprising a body, in which a feeding buffer zone, a bag-breaking zone, and a discharging buffer zone are sequentially arranged from top to bottom;

[0007] The feeding buffer is used to control the amount and speed of bagged domestic waste entering the machine body to play a buffering role;

[0008] The bag breaking area is provided with a knife. When the bagged domestic garbage enters the bag breaking area, the knife in the bag breaking area breaks the bagged domestic garbage in the bag breaking area by pulling out, inserting and rotating the blade.

[0009] The discharging buffer zone is used to control the discharging speed and amount of the domestic garbage after the bags are broken, so as to play a buffering role.

[0010] Optionally, the bag breaking area includes a first-level bag breaking area, and first-level bag breaking tools are symmetrically arranged on two opposite sides of the first-level bag breaking area, and two groups of first-level bag breaking tools are arranged on the same side; the first-level bag breaking tool includes a first-level bag breaking outer ring and a first-level bag breaking inner ring, and the first-level bag breaking outer ring and the first-level bag breaking inner ring are concentric ring structures, and a first-level bag breaking outer ring knife is installed on the first-level bag breaking outer ring, and a first-level bag breaking inner ring knife is installed on the first-level bag breaking inner ring; the first-level bag breaking outer ring and the first-level bag breaking inner ring serve as bases, respectively driving the first-level bag breaking outer ring knife and the first-level bag breaking inner ring knife to complete the insertion, rotation and extraction actions.

[0011] Optionally, the bag breaking area includes a secondary bag breaking area, which is located below the primary bag breaking area. Secondary bag breaking tools are symmetrically arranged on two opposite sides of the secondary bag breaking area. Two groups of secondary bag breaking tools are provided on the same side and are located below the gap between two primary bag breaking tools on the same side. The secondary bag breaking tool includes a secondary bag breaking ring, on which a secondary bag breaking tool is mounted. The secondary bag breaking ring serves as a base to drive the secondary bag breaking tool to complete the insertion, rotation and extraction actions.

[0012] Optionally, a baffle is also provided in the body, and the baffle is located below the primary bag breaking knife and the secondary bag breaking knife to guide the movement direction of the bagged domestic waste in the body, so that the bagged domestic waste passes through the primary bag breaking outer ring knife, the primary bag breaking inner ring knife and the secondary bag breaking knife in sequence.

[0013] Optionally, two top rollers are installed in the feed buffer area, and a feed channel is formed between the two top rollers.

[0014] Optionally, the surface of the top roller is distributed with multiple circles of large roller beads.

[0015] Optionally, bottom rollers are provided on both sides of the discharging buffer zone, and a partition is provided in the middle of the bottom of the discharging buffer zone, the partition is located below the gap between the two secondary bag breaking tools, and a discharging channel is formed between the two bottom rollers and the partition; and multiple circles of small roller beads are distributed on the surface of the bottom roller.

[0016] Optionally, the blade length of the first-level bag breaking tool and the second-level bag breaking tool is 35% to 45% of the thickness of the machine body; when the two groups of first-level bag breaking tools / second-level bag breaking tools on the opposite side are fully inserted, the blades entering the inside of the machine body account for 70% to 90% of the thickness of the machine body; when they are fully pulled out, the blades entering the inside of the machine body account for 10% to 20% of the thickness of the machine body.

[0017] Optionally, the mechanized bag breaking device for bagged domestic waste further includes a feed hopper, the bottom end of the feed hopper is connected to the upper end of the machine body.

[0018] In a second aspect, the present invention provides a mechanized bag breaking method for bagged domestic waste, based on the above-mentioned device, the method comprises:

[0019] The bagged domestic waste passing through the feeding buffer area is punctured and cut in the primary bag breaking area and the secondary bag breaking area respectively;

[0020] When the bagged domestic garbage passes through the primary bag breaking area, the secondary bag breaking ring drives the secondary bag breaking knife to be fully inserted into the body, thus blocking the bagged domestic garbage in the primary bag breaking area;

[0021] The primary bag-breaking outer ring and the primary bag-breaking inner ring drive the primary bag-breaking outer ring knife and the primary bag-breaking inner ring knife to perform a cycle of outward pulling → inward insertion → rotation → outward pulling → inward insertion → rotation, and perform primary bag breaking on the bagged domestic garbage in the primary bag-breaking area;

[0022] After the primary bag breaking operation is completed in the primary bag breaking area, the secondary bag breaking ring drives the secondary bag breaking knife to pull outward, so that the bagged domestic garbage in the primary bag breaking area falls downward into the secondary bag breaking area. Under the action of the baffle, the bagged domestic garbage does not slide down slowly. During the sliding process, the secondary bag breaking ring drives the secondary bag breaking knife to perform a cyclic bag breaking action of pulling outward → inserting inward → rotating → pulling outward → inserting inward → rotating, so as to perform secondary bag breaking on the domestic garbage;

[0023] After the second bag breaking, the domestic waste enters the discharge buffer and is discharged.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Compared with the prior art, the present invention adopts a vertical structure design, and uses gravity and rollers to make bagged domestic waste gradually pass through the bag breaking area, and performs graded bag breaking processing in the bag breaking area by pulling and inserting mechanical cutters and rotating the blades, thereby effectively improving the bag breaking efficiency and success rate; through the process of pulling the cutters outward, the soft materials hooked and entangled on the bag breaking cutter are automatically peeled off, eliminating the equipment shutdown cleaning step, significantly reducing the equipment operation failure rate, and improving the reliability of the equipment's continuous and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a mechanized bag breaking and processing device for bagged domestic waste provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the internal structure of a mechanized bag breaking and processing device for bagged domestic waste provided in an embodiment of the present application;

[0028] Figure 3-6 It is a schematic diagram of the bag breaking structure and operation mode;

[0029] Figure 7 This is a schematic diagram of the structure of a first-level bag breaking tool;

[0030] Figure 8 It is a schematic diagram of the structure of the secondary bag breaking tool;

[0031] Fig. 9 1. It is a schematic diagram of the top roller structure;

[0032] Fig.10 1. It is a schematic diagram of the bottom roller structure;

[0033] In the figure: 1 is the feed hopper, 2 is the machine body, 3 is the top roller, 3-1 is the large roller bead, 4 is the first-level bag breaking outer ring, 4-1 is the first-level bag breaking outer ring knife, 5 is the first-level bag breaking inner ring, 5-1 is the first-level bag breaking inner ring knife, 6 is the second-level bag breaking ring, 6-1 is the second-level bag breaking knife, 7 is the baffle, 8 is the bottom roller, 8-1 is the small roller bead, and 9 is the partition. DETAILED DESCRIPTION

[0034] Example:

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, if the terms "install", "connect", "connect", "fix" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the above terms can be understood in their specific meanings in this application according to the specific circumstances.

[0039] In this application, unless otherwise clearly specified and limited, if there is a description such as "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, "above", "above" and "above" a first feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "below" a first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0041] See also Figure 1-10 As shown, a mechanized bag-breaking device for bagged domestic waste provided in this embodiment includes a body, in which a feed buffer zone, a bag-breaking zone and a discharge buffer zone are arranged in sequence from top to bottom. The feed buffer zone is used to control the amount and speed of bagged domestic waste entering the body to play a buffering role; the bag-breaking zone is provided with a tool, and when the bagged domestic waste is in the bag-breaking zone, the tool in the bag-breaking zone breaks the bagged domestic waste in the bag-breaking zone by pulling outward, interlacing and rotating the blade; the discharge buffer zone is used to control the discharge speed and amount of the domestic waste after the bag is broken to play a buffering role.

[0042] It can be seen that the mechanized bag breaking device for bagged domestic waste provided in this embodiment adopts a vertical structural design as a whole, and uses gravity and a feed buffer zone to allow the bagged domestic waste to gradually pass through the bag breaking area, and in the bag breaking area, the mechanical tool is pulled outward and inserted and the blade is rotated to perform graded bag breaking processing, thereby effectively improving the bag breaking efficiency and success rate; through the tool pulling outward process, the soft materials hooked and entangled on the bag breaking knife are automatically peeled off, eliminating the equipment shutdown cleaning step, significantly reducing the equipment operation failure rate, and improving the reliability of the equipment's continuous and stable operation.

[0043] In a specific embodiment, the bag breaking area includes a primary bag breaking area, and primary bag breaking tools are symmetrically arranged on two opposite sides of the primary bag breaking area according to two longitudinally perpendicular cutting planes. Two groups of primary bag breaking tools are arranged on the same side, and the primary bag breaking tools include a primary bag breaking outer ring 4 and a primary bag breaking inner ring 5. The primary bag breaking outer ring 4 and the primary bag breaking inner ring 5 are concentric ring structures. The primary bag breaking outer ring knives 4-1 are evenly distributed on the primary bag breaking outer ring 4, and the distribution angle between two adjacent primary bag breaking outer ring knives 4-1 is 45° to 72°. The primary bag breaking inner ring knives 5-1 are evenly distributed on the primary bag breaking inner ring 5, and the distribution angle between two adjacent primary bag breaking inner ring knives 5-1 is 30° to 60°. The primary bag breaking outer ring 4 and the primary bag breaking inner ring 5 serve as a base, and respectively drive the primary bag breaking outer ring knife 4-1 and the primary bag breaking inner ring knife 5-1 to complete the insertion, rotation and extraction actions.

[0044] In addition, in order to further improve the bag breaking efficiency and success rate, the bag breaking area also includes a secondary bag breaking area, which is located below the primary bag breaking area. Secondary bag breaking cutters are symmetrically arranged on the two opposite sides of the secondary bag breaking area. The secondary bag breaking cutters on the same side are arranged in two groups and are located below the gap between the two primary bag breaking cutters on the same side. In this way, after the bagged domestic garbage completes the primary bag breaking operation in the primary bag breaking area, it can fall into the secondary bag breaking cutter for bag breaking operation; specifically, the secondary bag breaking cutter includes a secondary bag breaking ring 6, on which secondary bag breaking cutters 6-1 are evenly mounted, and the distribution angle between two adjacent secondary bag breaking cutters 6-1 is 30° to 60°. The secondary bag breaking ring 6 serves as a base to drive the secondary bag breaking cutter 6-1 to complete the insertion, rotation and extraction actions.

[0045] The first-stage bag-breaking outer ring knife 4-1, the first-stage bag-breaking inner ring knife 5-1, and the second-stage bag-breaking knife 6-1 have a blade length of 35% to 45% of the thickness of the body 2. When the two sets of bag-breaking knives on the opposite side are driven by their bag-breaking rings, the blades that enter the interior of the machine body 2 account for 70% to 90% of the thickness of the machine body 2 when they are fully inserted; when they are fully withdrawn, the blades that enter the interior of the machine body 2 account for 10% to 20% of the thickness of the machine body 2. Driven by their bag-breaking rings, the first-stage bag-breaking outer ring knife 4-1, the first-stage bag-breaking inner ring knife 5-1, and the second-stage bag-breaking knife 6-1 can perform a rotating bag-breaking operation, with a maximum rotation angle of -180° to 180°.

[0046] In a specific embodiment, a baffle 7 is also provided in the body 2, which is a pair of inclined opposing flat plates located in the primary bag breaking area and the secondary bag breaking area inside the body 2. Its main function is to guide the movement direction of the bagged domestic waste in the equipment, so that the bagged domestic waste passes through the primary bag breaking outer ring knife 4-1, the primary bag breaking inner ring knife 5-1 and the secondary bag breaking knife 6-1 in sequence to be fully broken.

[0047] In a specific embodiment, two top rollers 3 are installed in the feed buffer, and a feed channel is formed between the two top rollers 3. The two top rollers 3 rotate in opposite directions, and the direction of the top rollers 3 can be adjusted to form an upward and downward pressing operation on the feed, thereby controlling the amount of domestic garbage entering the body 2 and the feeding speed to play a buffering role. In addition, multiple circles of multiple large roller beads 3-1 are distributed on the surface of the top roller 3, and the uniform distribution angle of the large roller beads in the same circle is 45° to 72°, and the large roller beads in adjacent circles are cross-uniformly arranged. In this way, by distributing multiple circles of multiple large roller beads 3-1 on the surface of the top roller 3, the contact area and friction with the bagged domestic garbage can be increased, and the operating efficiency of the components can be improved.

[0048] In a specific embodiment, bottom rollers 8 are arranged on both sides of the discharge buffer zone, and a partition 9 is arranged in the middle of the bottom of the discharge buffer zone. The partition 9 is located below the gap between the two secondary bag breaking tools, and a discharge channel is formed between the two bottom rollers 8 and the partition 9; multiple circles of multiple small roller beads are distributed on the surface of the two bottom rollers 8, and the uniform distribution angle of the small roller beads 8-1 in the same circle is 30° to 60°, and the small roller beads 8-1 in adjacent circles are cross-uniformly arranged. The two bottom rollers 8 rotate in opposite directions, and the steering of the bottom rollers 8 can be adjusted to form an upward and downward pressing operation on the discharge, thereby controlling the discharge speed of the bagged domestic garbage after the bag is broken, so as to play a buffering role, improve the secondary bag breaking effect, and avoid discharge blockage. The main function of the small roller beads 8-1 distributed on the surface of the bottom roller 8 is to increase the contact area and friction with the bagged domestic garbage and improve the operating efficiency of the components.

[0049] In a preferred embodiment, the mechanized bag breaking device for bagged domestic waste provided in this embodiment also includes a feed hopper 1, the bottom end of the feed hopper 1 is connected to the upper end of the machine body 2, so as to collect the bagged domestic waste into the machine body, and the feed hopper 1 and the machine body 2 are in the shape of a square pyramid with a larger top and a smaller bottom, and are hollow inside, forming the outer shell of the mechanized bag breaking device for bagged domestic waste.

[0050] This embodiment also provides a mechanized bag breaking method for bagged domestic waste, based on the above-mentioned device, comprising:

[0051] The bagged domestic waste enters the feeding buffer through the hopper, and the domestic waste passing through the feeding buffer is punctured and cut in the primary bag breaking area and the secondary bag breaking area in turn;

[0052] When the bagged domestic garbage passes through the primary bag breaking area, the secondary bag breaking ring 6 drives the secondary bag breaking knife 6-1 to be fully inserted into the body 2, thereby blocking the bagged domestic garbage in the primary bag breaking area and ensuring the primary bag breaking effect; and the primary bag breaking outer ring 4 and the primary bag breaking inner ring 5 drive the primary bag breaking outer ring knife 4-1 and the primary bag breaking inner ring knife 5-1 to perform a cyclic bag breaking action of "external pull → internal insertion → rotation → external pull → internal insertion → rotation", thereby performing primary bag breaking on the bagged domestic garbage in the primary bag breaking area;

[0053] After the primary bag breaking operation is completed in the primary bag breaking area, the secondary bag breaking ring 6 drives the secondary bag breaking knife 6-1 to pull outward, so that the bagged domestic garbage in the primary bag breaking area falls downward into the secondary bag breaking area. Due to the effect of the baffle 7, the bagged domestic garbage will not fall directly, but will slide slowly downward. During the sliding process, the secondary bag breaking ring 6 drives the secondary bag breaking knife 6-1 to perform a cyclic bag breaking action of "pulling outward → inserting inward → rotating → pulling outward → inserting inward → rotating", so as to perform secondary bag breaking on the domestic garbage;

[0054] The domestic waste after the second bag breaking will be discharged into the discharge buffer area.

[0055] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanized bag breaking device for bagged domestic waste, characterized in that: It comprises a machine body, in which a feeding buffer area, a bag breaking area and a discharging buffer area are arranged in sequence from top to bottom; The feeding buffer is used to control the amount and speed of bagged domestic waste entering the machine body to play a buffering role; The bag breaking area is provided with a knife. When the bagged domestic garbage enters the bag breaking area, the knife in the bag breaking area breaks the bagged domestic garbage in the bag breaking area by pulling out, inserting and rotating the blade. The discharging buffer zone is used to control the discharging speed and amount of the domestic garbage after the bags are broken, so as to play a buffering role.

2. The mechanized bag breaking device for bagged domestic waste as claimed in claim 1, characterized in that: The bag breaking area includes a first-level bag breaking area, and first-level bag breaking tools are symmetrically arranged on two opposite sides of the first-level bag breaking area, and two groups of first-level bag breaking tools are arranged on the same side; the first-level bag breaking tool includes a first-level bag breaking outer ring and a first-level bag breaking inner ring, and the first-level bag breaking outer ring and the first-level bag breaking inner ring are concentric ring structures, and a first-level bag breaking outer ring knife is installed on the first-level bag breaking outer ring, and a first-level bag breaking inner ring knife is installed on the first-level bag breaking inner ring; the first-level bag breaking outer ring and the first-level bag breaking inner ring serve as bases, respectively driving the first-level bag breaking outer ring knife and the first-level bag breaking inner ring knife to complete the insertion, rotation and extraction actions.

3. The mechanized bag breaking device for bagged domestic waste according to claim 2, characterized in that: The bag breaking area includes a secondary bag breaking area, which is located below the primary bag breaking area. Secondary bag breaking tools are symmetrically arranged on two opposite sides of the secondary bag breaking area. Two groups of secondary bag breaking tools are provided on the same side and are located below the gap between the two primary bag breaking tools on the same side. The secondary bag breaking tool includes a secondary bag breaking ring, on which a secondary bag breaking tool is mounted. The secondary bag breaking ring serves as a base to drive the secondary bag breaking tool to complete the insertion, rotation and extraction actions.

4. The mechanized bag breaking device for bagged domestic waste according to claim 3, characterized in that: A baffle is also provided in the body, and is located below the primary bag breaking knife and the secondary bag breaking knife to guide the movement direction of the bagged domestic waste in the body, so that the bagged domestic waste passes through the primary bag breaking outer ring knife, the primary bag breaking inner ring knife and the secondary bag breaking knife in sequence.

5. The mechanized bag breaking device for bagged domestic waste according to claim 1, characterized in that: Two top rollers are installed in the feed buffer area, and a feed channel is formed between the two top rollers.

6. The mechanized bag breaking device for bagged domestic waste according to claim 5, characterized in that: The surface of the top roller is provided with multiple circles of large roller beads.

7. The mechanized bag breaking device for bagged domestic waste according to claim 3, characterized in that: Bottom rollers are arranged on both sides of the discharging buffer zone, and a partition is arranged in the middle of the bottom of the discharging buffer zone. The partition is located below the gap between the two secondary bag breaking tools, and a discharging channel is formed between the two bottom rollers and the partition; and multiple circles of small roller beads are distributed on the surface of the bottom roller.

8. The mechanized bag breaking device for bagged domestic waste according to claim 3, characterized in that: The blade length of the first-level bag breaking tool and the second-level bag breaking tool is 35% to 45% of the thickness of the machine body; when the two groups of first-level bag breaking tools / second-level bag breaking tools on the opposite side are fully inserted, the blades entering the inside of the machine body account for 70% to 90% of the thickness of the machine body; when they are fully pulled out, the blades entering the inside of the machine body account for 10% to 20% of the thickness of the machine body.

9. The mechanized bag breaking device for bagged domestic waste according to claim 1, characterized in that: The machine also comprises a feed hopper, the bottom end of which is connected to the upper end of the machine body.

10. A mechanized bag breaking method for bagged domestic waste, based on the device according to claim 4, characterized in that: The method comprises: The bagged domestic waste passing through the feeding buffer area is punctured and cut in the primary bag breaking area and the secondary bag breaking area respectively; When the bagged domestic garbage passes through the primary bag breaking area, the secondary bag breaking ring drives the secondary bag breaking knife to be fully inserted into the body, thus blocking the bagged domestic garbage in the primary bag breaking area; The primary bag-breaking outer ring and the primary bag-breaking inner ring drive the primary bag-breaking outer ring knife and the primary bag-breaking inner ring knife to perform a cycle of outward pulling → inward insertion → rotation → outward pulling → inward insertion → rotation, and perform primary bag breaking on the bagged domestic garbage in the primary bag-breaking area; After the primary bag breaking operation is completed in the primary bag breaking area, the secondary bag breaking ring drives the secondary bag breaking knife to pull outward, so that the bagged domestic garbage in the primary bag breaking area falls downward into the secondary bag breaking area. Under the action of the baffle, the bagged domestic garbage does not slide down slowly. During the sliding process, the secondary bag breaking ring drives the secondary bag breaking knife to perform a cyclic bag breaking action of pulling outward → inserting inward → rotating → pulling outward → inserting inward → rotating, so as to perform secondary bag breaking on the domestic garbage; The domestic waste after the second bag breaking will be discharged into the discharge buffer area.

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