Garbage bag breaking device and method based on piston extrusion and girdling principle

Abstract

The invention relates to the technical field of garbage pretreatment, and discloses a garbage bag breaking device and method based on the piston extrusion and ring cutting principle. The garbage bag breaking device comprises a workbench, a pipe barrel is fixedly connected to the top of the workbench, a feeding opening is formed in the top of the pipe barrel, and a reducing section is fixedly installed at the outlet end of the pipe barrel; a piston extrusion assembly used for extruding garbage bags is arranged on the outer side of the pipe barrel, an annular cutting tool used for conducting annular cutting on the garbage bags is arranged in the reducing section, a hook disc used for separating the garbage bags is arranged at the bottom of the workbench, and a driving assembly used for driving the hook disc and the annular cutting tool is arranged at the bottom of the workbench. The top of the workbench is further provided with a reverse plate. The garbage bag is axially compressed through the piston extrusion assembly, the garbage bag can be rapidly and completely scratched, it is ensured that garbage in the bag is completely released, and compared with a traditional tearing or simple puncturing mode, bag breaking is more thorough, and efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of garbage pretreatment, in particular to a garbage bag breaking device and method based on the principle of piston extrusion and ring cutting. BACKGROUND

[0002] With the increasing global awareness of environmental protection and the rapid development of circular economy, the classification, recycling and resource utilization of municipal solid waste have become an inevitable trend. In the waste treatment process, a large amount of household garbage is collected and transported in bagged form. In order to effectively sort, compost, incinerate or recycle the garbage in the bag, the garbage bag must be first broken open so that the contents can be released. Therefore, efficient and automatic breaking of bagged garbage is a crucial step in the entire garbage pretreatment process.

[0003] Currently, the common garbage bag breaking devices on the market mainly rely on mechanical tearing, shearing or hammering breaking principles. For example, some devices use claw or hook tearing structures to hang and forcibly tear open the garbage bag; others use rotating blade groups or breaking hammers to indiscriminately attack the garbage to achieve the purpose of breaking the bag. However, these existing technical solutions generally have the following problems: Incomplete bag breaking with high residual rate: The traditional tearing or shearing method often has a random action point, making it difficult to ensure that every garbage bag can be completely opened, resulting in a large amount of garbage still remaining in the bag, which directly affects the efficiency and separation purity of the subsequent sorting and screening processes.

[0004] Easy to cause secondary pollution: Breaking and high-strength tearing methods can easily tear the garbage bag into a large number of irregular small pieces. These plastic fragments are deeply mixed with organic garbage, kitchen waste and other materials in the bag, which are difficult to separate effectively by existing technologies, not only polluting the organic materials (such as compost products) and reducing the value of resource utilization, but also causing great difficulty in subsequent processing.

[0005] Cannot achieve bag and material separation: Most existing devices fall into the next processing step with the broken garbage bag and the garbage in the bag after breaking the bag. In order to separate these plastic bags, expensive and large-area devices such as air separators and bounce screens are often required, which undoubtedly increases the complexity, investment cost and energy consumption of the entire processing system.

[0006] Therefore, developing a new type of garbage bag breaking device that can efficiently and completely break open the garbage bag, automatically separate the broken empty bag from the contents in the bag, and has a reliable structure and stable operation, is a technical problem to be solved in the current garbage disposal field. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application provides a garbage bag breaking device and method based on the principle of piston extrusion and ring cutting, which solves the problems of incomplete bag breaking and high residual rate of garbage in the prior art.

[0008] To achieve the above object, the present application is implemented by the following technical scheme: a garbage bag breaking device and method based on the principle of piston extrusion and ring cutting, comprising a workbench, a pipe barrel fixedly connected to the top of the workbench, a feed inlet formed in the top of the pipe barrel, and a reduced diameter section fixedly installed at the outlet end of the pipe barrel; A piston extrusion assembly for extruding the garbage bag is arranged outside the pipe barrel, a ring cutting tool for ring cutting the garbage bag is arranged inside the reduced diameter section, and a hook plate for separating the garbage bag is arranged at the bottom of the workbench. A driving assembly for driving the hook plate and the ring cutting tool is arranged at the bottom of the workbench, and a reverse plate is further arranged at the top of the workbench. The ring cutting tool comprises an annular disc rotatably connected to the middle of the reduced diameter section, and a plurality of bag breaking knives are arranged inside the annular disc.

[0009] Preferably, the elastic pre-tightening assembly comprises a plurality of movable grooves formed in the inner side of the annular disc, a limiting block fixedly connected to one side of the bag breaking knife, the limiting block being slidably connected to the inside of the movable groove, and an extrusion spring fixedly connected between the limiting block and the inner wall of the movable groove.

[0010] Preferably, the piston extrusion assembly comprises a nail disc slidably connected to the inside of the pipe barrel, a plurality of guide rods fixedly connected to the surface of one side of the nail disc away from the outlet end of the pipe barrel, and an installation block arranged at the center of the surface of one side of the nail disc away from the outlet end of the pipe barrel. A plurality of spring grooves are formed in the inside of the installation block, a connecting groove is formed in the center of the surface of one side of the nail disc close to the outlet end of the pipe barrel, a push disc is slidably connected to the inside of the nail disc, and a plurality of stretching springs are fixedly connected to one side of the push disc close to the installation block. The nail disc and the push disc are arranged in a circumferential array on one side surface of the outlet end of the pipe barrel, a plurality of piercing nails are arranged on the surface of one side of the push disc away from the piercing nails, a connecting shaft is fixedly connected to the center of the surface of one side of the push disc away from the piercing nails, the guide rods are fixedly connected to the surface of the connecting shaft on one side away from the nail disc, a hydraulic lever is fixedly connected to the outside of one of the guide rods, and the output end of the hydraulic lever is fixedly connected to the outer wall surface of the pipe barrel.

[0011] Preferably, the driving assembly comprises a driving motor fixedly connected to the bottom surface of the workbench, an output end of the driving motor is fixedly connected with a driving shaft through a shaft coupling, the outer periphery of the driving shaft is fixedly connected with a driving gear, the outer periphery of the annular disc is fixedly connected with a driven gear, and the driving gear and the driven gear are in meshing connection with each other.

[0012] Preferably, the hook disc comprises a rotating disc arranged below the outlet end of the reduced-diameter section, and a plurality of connecting pieces are arranged in a circumferential array on one side surface of the rotating disc close to the reduced-diameter section, and each connecting piece is fixedly connected with a hook for hooking the empty bag after the bag is broken.

[0013] Preferably, the hook is an obtuse-angle bent structure, and the hook disc is fixedly connected to the end of the driving shaft.

[0014] Preferably, the reduced-diameter section is in a conical structure, and the inverted plate is arranged below the outlet end of the reduced-diameter section.

[0015] Preferably, the guide rod is in an L-shaped structure, and the push disc is in sliding connection with the inside of the connecting groove.

[0016] Preferably, one end of the tension spring away from the push disc is fixedly connected to the inside of the spring groove, and the size of the push disc is matched with the size of the outlet end of the reduced-diameter section.

[0017] The second aspect of the present application provides a garbage bag breaking method based on the principle of piston extrusion and ring cutting, comprising the following steps: The bagged garbage is put into the pipe barrel through the feeding port; the nail disc and the push disc are driven to advance by the hydraulic lever, the bagged garbage is pierced by the piercing nails and the gas in the bagged garbage is released, and the bagged garbage is axially compressed; the compressed bagged garbage is pushed by the nail disc and the push disc through the reduced-diameter section, so that the bag wall of the bagged garbage is circumferentially cut by the ring cutter, and the garbage in the bagged garbage is released. The empty bag after the bagged garbage is broken is continuously pushed by the push disc to the outlet of the reduced-diameter section and is hooked by the hook on the rotating hook disc; the hook disc rotates to a certain degree, the hooked empty bag is transported to the lower side, the empty bag is dropped from the hook under the action of gravity, and the separation of the garbage bag and the garbage is completed.

[0018] The present application provides a garbage bag breaking device and method based on the principle of piston extrusion and ring cutting. The present application has the following advantages: 1. The present application adopts the combination of piston extrusion and ring cutting, first compresses the garbage bag axially through the piston extrusion assembly, and tightens the bag wall radially through the reduced-diameter section, which creates conditions for subsequent cutting. The circumferential cutting of the tight bag wall by the rotating ring cutter can quickly and completely cut the garbage bag, ensure the complete release of the garbage in the bag, and is more thorough and efficient than the traditional tearing or simple piercing method.

[0019] 2、The present application separates the empty bag through the hook plate, after the garbage is released, the push plate continues to push the empty bag to the outlet, is hooked by the synchronous rotation hook, then, the hook plate rotates to another position, the empty bag is automatically dropped to the designated collection area by the obtuse angle structure of the hook and the action of gravity, realizes the automatic physical separation of the garbage and the garbage bag, improves the purity and efficiency of the subsequent sorting, and reduces the manual intervention.

[0020] 3、The present application through the elastic pre-tightening assembly in the ring cutter, ensure that the bag breaking knife is close to the bag wall when cutting, ensure the cutting effect, but also in the cutter encounters hard material in the garbage, through the buffer action of the spring makes the cutter instantaneous retraction, effectively protect the blade and motor, prevent the equipment from being stuck or damaged, improve the running stability and service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of the present application; Figure 2 It is a schematic view of the driving assembly in the present application; Figure 3 It is a schematic view of the piston extrusion assembly in the present application; Figure 4 It is a schematic view of the mounting block in the present application; Figure 5 It is a schematic view of the ring cutter in the present application; Figure 6 It is a schematic view of the bag breaking knife in the present application; Figure 7 It is Figure 6 the enlarged view of B in the figure; Figure 8 It is Figure 4 the enlarged view of A in the figure.

[0022] LEGEND 1, workbench;2, pipe barrel;3, feed inlet;4, piston extrusion assembly;40, hydraulic lever;41, nail disc;42, guide rod;43, mounting block;44, spring groove;45, connecting groove;46, push plate;47, extension spring;48, piercing nail;49, connecting shaft;5, reduced diameter section;6, ring cutter;61, ring disc;62, bag breaking knife;7, hook plate;71, rotating disc;72, connecting piece;73, hook;8, driving assembly;81, driving motor;82, driving shaft;83, driving gear;84, driven gear;9, inverted plate;10, elastic pre-tightening assembly;101, movable groove;102, limit block;103, extrusion spring. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0024] Referring to Figures 1-8 The embodiment of the present application provides a garbage bag breaking device based on the principle of piston extrusion and ring cutting, which comprises a workbench 1, a pipe barrel 2 fixedly connected to the top of the workbench 1, a feeding port 3 formed in the top of the pipe barrel 2, and a reduced diameter section 5 fixedly installed at the outlet end of the pipe barrel 2. Referring to Figures 1-3 A piston extrusion assembly 4 for extruding the garbage bag is arranged outside the pipe barrel 2, a ring cutting tool 6 for ring cutting the garbage bag is arranged inside the reduced diameter section 5, and a hook plate 7 for separating the garbage bag is arranged at the bottom of the workbench 1. A driving assembly 8 for driving the hook plate 7 and the ring cutting tool 6 is arranged at the bottom of the workbench 1, and a reverse plate 9 is further arranged at the top of the workbench 1, and a conveying device for conveying the garbage to a sorting link is arranged below the reverse plate 9. The ring cutting tool 6 comprises an annular disc 61 rotationally connected to the middle of the reduced diameter section 5, and a plurality of bag breaking knives 62 are arranged inside the annular disc 61, and an elastic pre-tightening assembly 10 is arranged between each bag breaking knife 62 and the annular disc 61.

[0025] Specifically, the design makes the bag breaking knife 62 closely fit the outer wall of the compressed garbage bag by relying on the pre-tightening force provided by the extrusion spring 103 when the annular disc 61 rotates, ensuring the effectiveness and continuity of cutting. When the bag breaking knife 62 encounters a hard object in the garbage that cannot be cut open, the limiting block 102 will slide in the movable slot 101, compressing the extrusion spring 103, so that the tool instantaneously retracts, thereby playing a role in buffering and protecting the tool and preventing the equipment from being stuck.

[0026] Referring to Figures 4-6 The elastic pre-tightening assembly 10 comprises a plurality of movable slots 101 formed in the inner side of the annular disc 61, and a limiting block 102 is fixedly connected to one side of the bag breaking knife 62, the limiting block 102 is slidingly connected inside the movable slot 101, and an extrusion spring 103 is fixedly connected between the limiting block 102 and the inner wall of the movable slot 101.

[0027] Referring to Figure 4Specifically, the hydraulic lever 40 acts as a power source to push the entire assembly forward. First, the puncture nails 48 on the nail disc 41 and the push disc 46 work together to puncture the garbage bag and release the internal gas. As the extrusion proceeds, the tension springs 47 allow a slight displacement between the nail disc 41 and the push disc 46 to some extent, acting as a buffer and adapting to different garbage compression. The guide rods 42 ensure that the entire piston assembly moves smoothly and straight in the tub 2, preventing deviation. The connecting shaft 49 links the movement of the push disc 46 with the guide rods 42, ensuring the integrity of the structure and the effective transmission of the pushing force.

[0028] The piston extrusion assembly 4 includes a nail disc 41 slidingly connected inside the tub 2, and a plurality of guide rods 42 are uniformly fixed to the surface of the nail disc 41 away from the outlet end of the tub 2. The center of the surface of the nail disc 41 away from the outlet end of the tub 2 is provided with a mounting block 43; A plurality of spring grooves 44 are formed in the mounting block 43, and a connecting groove 45 is formed in the center of the surface of the nail disc 41 close to the outlet end of the tub 2. The nail disc 41 is slidingly connected with a push disc 46, and a plurality of tension springs 47 are uniformly fixed to the side of the push disc 46 close to the mounting block 43; Please refer to Figures 7-8 The nail disc 41 and the push disc 46 are both circumferentially arrayed with a plurality of puncture nails 48 on the surface of the outlet end of the tub 2. The center of the surface of the push disc 46 away from the puncture nails 48 is fixedly connected with a connecting shaft 49, and the side of each guide rod 42 away from the nail disc 41 is fixedly connected to the surface of the connecting shaft 49. The outside of one of the guide rods 42 is fixedly connected with a hydraulic lever 40, and the output end of the hydraulic lever 40 is fixedly connected to the outer wall surface of the tub 2.

[0029] The drive assembly 8 includes a drive motor 81 fixedly connected to the bottom surface of the workbench 1, and the output end of the drive motor 81 is fixedly connected with a drive shaft 82 through a shaft coupling. The drive shaft 82 is fixedly connected with a drive gear 83 on the outer periphery, and the outer periphery of the ring disc 61 is fixedly connected with a driven gear 84. The drive gear 83 and the driven gear 84 are meshingly connected with each other.

[0030] Specifically, the drive motor 81 generates rotary power after being energized, which is stably transmitted to the drive shaft 82 through the shaft coupling. The drive gear 83 on the drive shaft 82 is precisely meshed with the driven gear 84 on the outer edge of the ring disc 61, converting the rotary motion of the motor into the circumferential rotation of the ring cutter 6. This gear transmission method has the advantages of simple structure, accurate transmission ratio, and high reliability, and can provide stable and continuous cutting power for the ring cutting process.

[0031] The hook disc 7 includes a rotating disc 71 arranged below the outlet end of the reduced diameter section 5, and a plurality of connecting pieces 72 are circumferentially arrayed on the side surface of the rotating disc 71 close to the reduced diameter section 5. Each connecting piece 72 is fixedly connected with a hook 73 outside for hooking the empty bag after the bag is broken.

[0032] Specifically, this structure is specially used for separating the empty garbage bag after the bag is broken. When the push disc 46 pushes the empty bag out of the outlet of the reduced diameter section 5, the hooks 73 on the hook disc 7 rotating synchronously can move just below the outlet and hook the thin empty bag by the hook structure. By this active hooking mode, it is ensured that the empty bag can be effectively captured instead of falling with the garbage, so as to realize the preliminary separation of the bag and the material.

[0033] The hook 73 is an obtuse angle bending structure, and the hook disc 7 is fixedly connected to the end of the driving shaft 82.

[0034] Specifically, the obtuse angle bending design of the hook 73 can make the empty bag slide off along the gentle slope of the obtuse angle under the action of its own gravity after the empty bag is hooked, and fall into the designated collection device without the need of additional blowing or knocking device, so as to simplify the structure. The hook disc 7 is fixed to the end of the driving shaft 82, so as to ensure that the rotation of the hook disc 7 is synchronous and coordinated with the movement of the ring cutter 6 and ensure that the hooking action is accurate.

[0035] The reduced diameter section 5 is in a conical structure, and the inverted plate 9 is arranged below the outlet end of the reduced diameter section 5.

[0036] Specifically, the conical structure of the reduced diameter section 5 plays an important auxiliary role. When the garbage bag is axially pushed, the conical structure applies radial pressure to the garbage bag, so that the garbage bag is passively tightened and the bag wall is taut. This provides an ideal and tensioned cutting surface for the subsequent ring cutter 6, and improves the bag breaking efficiency and success rate. The inverted plate 9 serves as a simple physical flow guide component, so as to ensure that the garbage released from the bag can accurately and accurately fall into the conveying device below, and avoid the scattering of the material.

[0037] The guide rod 42 is in an L-shaped structure, and the push disc 46 is slidingly connected to the inside of the connecting groove 45.

[0038] Specifically, the L-shaped structure of the guide rod 42 not only enhances the structural rigidity of the guide rod 42, but also ingeniously provides a convenient connection point for the installation of the hydraulic rod 40, so that the hydraulic rod 40 can be driven without interfering with the central movement of the piston assembly. The push disc 46 can slide in the connecting groove 45 of the spike disc 41, which reflects the possibility of relative movement between the two, and this design can better adapt to the irregular shape of the garbage lump and achieve a more sufficient extrusion effect.

[0039] The ends of the tension springs 47 away from the push disc 46 are fixedly connected to the inside of the spring groove 44, and the size of the push disc 46 matches the size of the outlet end of the reduced diameter section 5.

[0040] Specifically, the tension spring 47 connects the push disc 46 and the rear mounting block 43, and pulls the push disc 46 rearward in the static state. When the piston extrusion assembly 4 is pushed forward, if a larger resistance is encountered, the spring structure can provide a certain elastic buffer. When the nail disc 41 moves to the one end of the reduced diameter section 5 close to the pipe barrel 2, because the inner diameter of the reduced diameter section 5 is smaller than the inner diameter of the pipe barrel 2, the reduced diameter section 5 will clamp the nail disc 41, and when the nail disc 41 is not clamped, the pushing force of the hydraulic lever 40 can be transmitted to the nail disc 41 through the push disc 46 and the tension spring 47, so as to drive the nail disc 41 to move in the pipe barrel 2.

[0041] With the movement of the nail disc 41 and the push disc 46, the bagged garbage can be pierced by the piercing nails 48, and the bag wall can be pierced. With the pushing of the hydraulic lever 40, the tension spring 47 is stretched, the push disc 46 continues to push the bagged garbage into the reduced diameter section 5, the compression phase of the bagged garbage is completed, and the gas in the bagged garbage is discharged. The size of the push disc 46 matched with the outlet of the reduced diameter section 5 is the key to completely emptying. With the continuous movement of the push disc 46, it can be ensured that all the garbage in the bag and the damaged empty bag itself can be completely pushed out of the reduced diameter section 5 at the end of the stroke, so as to avoid residue and blockage.

[0042] The second aspect of the present application provides a bag breaking method of garbage bag based on the principle of piston extrusion and ring cutting, comprising the following steps: S1, the bagged garbage is put into the pipe barrel 2 through the feeding port 3; S2, the nail disc 41 and the push disc 46 are driven to move forward by the hydraulic lever 40, the piercing nails 48 pierce the bagged garbage and release the gas in the bagged garbage, and the bagged garbage is axially compressed; S3, the compressed bagged garbage is pushed by the nail disc 41 and the push disc 46 through the reduced diameter section 5, so that the bag wall of the bagged garbage is circumferentially cut by the ring cutter 6, and the garbage in the bagged garbage is released; S4, the empty bag after the bagged garbage is broken is continuously pushed to the outlet of the reduced diameter section 5 by the push disc 46, and is hooked by the hooks 73 on the hook disc 7 which rotates; S5, the hook disc 7 rotates 180 degrees to transfer the hooked empty bag to the lower side, and the empty bag is dropped from the hooks 73 under the action of gravity, so as to complete the separation of the garbage bag and the garbage.

[0043] Working principle: in use, first, the whole bag of garbage is put into the pipe barrel 2 inside fixed on the top of the workbench 1 through the feeding port 3 on the top of the pipe barrel 2, then the piston extrusion assembly 4 arranged outside the pipe barrel 2 starts to work, the hydraulic lever 40 inside drives the nail disc 41 and the push disc 46 as a whole to move forward, axially compresses the garbage bag inside the pipe barrel 2, in this extrusion process, the multiple piercing nails 48 arranged in a circle on the surface of the nail disc 41 and the push disc 46 will first pierce the garbage bag, this design not only can effectively release the gas accumulated in the bag, avoid the pressure problem that may occur in the subsequent processing, but also creates conditions for preliminary compaction. With the continuous advancement of the piston assembly, the pierced and compacted garbage bag is forcibly pushed to the conical reduced diameter section 5 fixedly installed at the outlet end of the pipe barrel 2.

[0044] The structure of the reduced diameter section 5 will produce radial extrusion force on the garbage bag, so that it is radially tightened while being axially pushed, and the bag wall is tightly attached to the inner wall of the reduced diameter section 5. Inside the reduced diameter section 5, the core ring cutter 6 is arranged, which mainly consists of a rotatable annular disc 61 and multiple bag breaking knives 62 with elastic pre-tightening assemblies 10 installed in the disc. When the compressed garbage bag passes through, the annular disc 61 is driven to rotate by the driving assembly 8 arranged at the bottom of the workbench 1, which includes a driving motor 81, a driving shaft 82 and a gear, and in turn drives the bag breaking knives 62 to continuously cut the tightly stretched garbage bag wall in a circumferential ring shape, so as to completely tear the garbage bag, and the garbage in the bag is released due to the bag body rupture, and falls into the pre-set conveying device through the inverted plate 9 below, and enters the next step of sorting.

[0045] After the bag is broken, the size of the push disc 46 matches the size of the outlet of the reduced diameter section 5, which will continue to move forward and push the empty garbage bag debris out of the outlet of the reduced diameter section 5. Directly below the outlet, there is a hook disc 7 rotated by the driving shaft 82 of the same driving assembly 8. The hook disc 7 is provided with multiple hooks 73 in an obtuse angle bending structure, which can accurately hook the empty bags when they are pushed out. Finally, the hook disc 7 continues to rotate 180 degrees under the drive, and the hooked empty bags are transported to the lower part of the designated position, at this time the empty bags will automatically slide off the obtuse angle hooks 73 under the action of their own gravity, and fall into the special collection area of the garbage bag, so as to realize the full-automatic separation of garbage and garbage bag.

Claims

1. A bag breaking device for garbage bags based on the principle of piston extrusion and ring cutting, characterized in that, Including workbench (1), the workbench (1) top fixedly connected with pipe bucket (2), the pipe bucket (2) top is equipped with inlet (3), the pipe bucket (2) outlet end fixedly installed with the reduced section (5); The pipe bucket (2) outside is provided with piston extrusion assembly (4) for extruding garbage bag, the reduced section (5) inside is provided with ring cutting cutter (6) for cutting garbage bag, the workbench (1) bottom is provided with the hook plate (7) for separating garbage bag; The workbench (1) bottom is provided with the drive assembly (8) for driving hook plate (7) and ring cutting cutter (6), the workbench (1) top is also provided with inverted plate (9), the inverted plate (9) below is provided with the conveying device for conveying garbage to sorting link; The ring cutting cutter (6) includes annular disc (61) rotationally connected in the reduced section (5) middle part, the annular disc (61) inside is provided with multiple bag breaking knives (62), each bag breaking knife (62) is provided with elastic pre-tightening assembly (10) between annular disc (61).

2. A device for breaking open a bag according to claim 1, characterized in that, The elastic pre-tightening assembly (10) includes multiple movable grooves (101) formed in the inner side of annular disc (61), one side of bag breaking knife (62) is fixedly connected with limit block (102), limit block (102) is slidingly connected in the inside of movable groove (101), limit block (102) and movable groove (101) inner wall are both fixedly connected with extrusion spring (103).

3. A device for breaking open a bag according to claim 1, characterized in that, The piston extrusion assembly (4) includes nail disc (41) slidingly connected in the inside of pipe bucket (2), the nail disc (41) far side from the outlet end of pipe bucket (2) one side surface is uniformly fixedly connected with multiple guide rods (42), the nail disc (41) far side from the outlet end of pipe bucket (2) one side surface center is provided with mounting block (43); The mounting block (43) inside is formed with multiple spring grooves (44), the nail disc (41) near the outlet end of pipe bucket (2) one side surface center is formed with connecting groove (45), the nail disc (41) inside is slidingly connected with push disc (46), the push disc (46) near mounting block (43) one side is uniformly fixedly connected with multiple tension springs (47); The nail disc (41) and push disc (46) are located on one side surface of the outlet end of pipe bucket (2) and are circumferentially arrayed with multiple piercing nails (48), the push disc (46) far side from piercing nail (48) one side surface center is fixedly connected with connecting shaft (49), the guide rod (42) far side from nail disc (41) one side is all fixedly connected on the surface of connecting shaft (49), one of the guide rod (42) outside is fixedly connected with hydraulic lever (40), the output end of hydraulic lever (40) is fixedly connected on the outer wall surface of pipe bucket (2).

4. A device for breaking open a bag according to claim 1, characterized in that, The driving assembly (8) comprises a driving motor (81) fixedly connected to the bottom surface of the workbench (1), an output end of the driving motor (81) is fixedly connected with a driving shaft (82) through a shaft coupling, the outer periphery of the driving shaft (82) is fixedly connected with a driving gear (83), the outer periphery of the annular disc (61) is fixedly connected with a driven gear (84), and the driving gear (83) and the driven gear (84) are in meshing connection with each other.

5. A device for breaking open a bag according to claim 4, characterized in that, The hook disc (7) comprises a rotating disc (71) arranged below the outlet end of the reduced-diameter section (5), and a plurality of connecting pieces (72) are arranged in a circumferential array on the side surface of the rotating disc (71) close to the reduced-diameter section (5); and a hook (73) for hooking the empty bag after the bag is broken is fixedly connected to the outer side of each connecting piece (72).

6. A device for breaking open a bag according to claim 5, characterized in that, The hook (73) is an obtuse-angle bent structure, and the hook disc (7) is fixedly connected to the end of the driving shaft (82).

7. A device for breaking open a bag according to claim 1, characterized in that, The reduced-diameter section (5) is in a conical structure, and the inverted plate (9) is arranged below the outlet end of the reduced-diameter section (5).

8. A device for breaking open a bag according to claim 3, characterized in that, The guide rod (42) is in an L-shaped structure, and the push disc (46) is slidingly connected in the connecting groove (45).

9. A device for breaking open a bag according to claim 3, characterized in that, The ends of the tension springs (47) away from the push disc (46) are fixedly connected in the spring grooves (44), and the size of the push disc (46) is matched with the size of the outlet end of the reduced-diameter section (5).

10. A method for breaking a bag based on the principle of piston extrusion and ring cutting, applied to the bag breaking device based on the principle of piston extrusion and ring cutting according to any one of claims 1-9, characterized in that, The method comprises the following steps: S1, the bagged garbage is put into the pipe barrel (2) through the feeding port (3); S2, the nail disc (41) and the push disc (46) are driven to advance through the hydraulic lever (40), the piercing nails (48) pierce the bagged garbage and release the gas in the bagged garbage, and the bagged garbage is axially compressed at the same time; S3, the compressed bagged garbage is pushed through the reduced-diameter section (5) under the pushing of the nail disc (41) and the push disc (46), so that the bag wall of the bagged garbage is circumferentially broken by the circumferential cutting tool (6), and the garbage in the bagged garbage is released; S4, the empty bag after the bagged garbage is broken is continuously pushed to the outlet of the reduced-diameter section (5) by the push disc (46) and is hooked by the hook (73) on the rotating hook disc (7); S5, the hook disc (7) is rotated by 180 degrees, the hooked empty bag is transported to the lower side, the empty bag is separated from the hook (73) under the action of gravity, and the separation of the garbage bag and the garbage is completed.

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