A pressure device for secondary recycling of liquid packaging boxes

Abstract

The present invention discloses a pressure device for secondary recycling of liquid packaging boxes, which relates to the field of press machines. The pressure device can be installed in a housing of a liquid packaging box secondary recycling device and is used to squeeze the packaging box. The pressure device specifically comprises a fixed squeezing roller, a floating squeezing roller and a floating device. The present invention realizes the floating of the squeezing roller through the floating device, thereby avoiding damage to the squeezing roller caused by hard objects, prolonging its service life and reducing the maintenance cost of the manufacturer.

Description

Technical Field

[0001] The invention relates to the field of presses, and in particular to a press device for secondary recycling of liquid packaging boxes. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Liquid packaging boxes will always produce a certain amount of waste packages with contents during the production process due to their specific filling process and quality requirements. If they are discarded directly, it will cause waste of raw materials. Therefore, the waste packages need to be processed. The packaging boxes can be recycled and the paper and plastic can be separated to increase efficiency.

[0004] At present, the market generally adopts mechanical extrusion or hydraulic extrusion packaging to achieve the secondary recycling of liquid packaging boxes. However, in pursuit of design, more and more materials and elements are introduced into the liquid packaging boxes on the market. This also leads to the presence of many hard objects on some liquid packaging boxes, such as lids, drain ports, etc. The mechanical strength of the extrusion roller used for the secondary recycling of liquid packaging boxes is not too great in design. Therefore, these hard objects will damage the extrusion roller, causing its service life to drop sharply, and increasing the manufacturer's maintenance cost. Summary of the invention

[0005] The purpose of the present invention is to provide a pressure device for secondary recycling of liquid packaging boxes to solve the problems existing in the prior art.

[0006] The technical solution of the present invention is as follows:

[0007] A pressure device for secondary recycling of liquid packaging boxes, characterized in that the pressure device can be installed in a housing of the liquid packaging box secondary recycling device, and is used to squeeze the packaging box, specifically comprising: a fixed squeezing roller, a floating squeezing roller and a floating device;

[0008] The fixed squeeze roller is installed in the housing through the fixed squeeze roller bearing chamber, and the floating squeeze roller is installed in the housing through the floating device; the fixed squeeze roller and the floating squeeze roller are both driven to rotate by the main motor through the transmission chain; the floating squeeze roller can slide left and right through the floating device;

[0009] The floating device includes: a floating squeeze roller bearing chamber, a sliding bearing chamber and a reset device; the sliding bearing chamber is fixed to the outside of the shell, and the upper and lower sides of the sliding bearing chamber are respectively provided with an upper guide rail and a lower guide rail; the floating squeeze roller bearing chamber is installed on one end of the floating squeeze roller, and is slidably installed in the sliding bearing chamber through the upper guide rail and the lower guide rail; the reset device is installed in the sliding bearing chamber to provide a reset force for the floating squeeze roller bearing chamber.

[0010] Furthermore, there are two floating devices, which are respectively arranged on both sides of the shell and connected to the two ends of the floating squeezing roller.

[0011] Furthermore, the reset device includes: a floating spring, an inner limit bolt and an outer limit bolt; the inner limit bolt and the outer limit bolt are installed in the sliding bearing chamber, and are respectively located on both sides of the floating squeeze roller bearing chamber; one end of the floating spring is connected to the floating squeeze roller bearing chamber, and the other end is connected to the inner wall of the sliding bearing chamber.

[0012] Furthermore, when the pressure device is operating, the floating squeeze roller bearing chamber is pressed on the outer limit bolt under the action of the floating spring. When a hard object enters, the hard object pushes the floating squeeze roller to move inward, thereby driving the floating squeeze roller bearing chamber to move inward, thereby compressing the floating spring, increasing the gap between the floating squeeze roller and the fixed squeeze roller, and allowing the hard object to pass through; the inner limit bolt plays an inner limit role.

[0013] Furthermore, the other end of the floating spring is connected to the inner wall of the sliding bearing chamber through an adjusting device; the compression degree of the floating spring can be adjusted through the adjusting device.

[0014] Furthermore, the adjusting device is a T-shaped lead screw, which is mounted on the wall of the sliding bearing chamber through a threaded section and a nut, and the floating spring is connected to the T-shaped section of the T-shaped lead screw.

[0015] Furthermore, a chain tensioning device is provided on the transmission chain.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention realizes left-right sliding of the floating squeeze roller by setting the floating device, and can enlarge the gap between the floating squeeze roller and the fixed squeeze roller to allow hard objects to pass through, thereby protecting the roller surfaces of the floating squeeze roller and the fixed squeeze roller from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the floating device;

[0019] Figure 2 is a schematic diagram of the structure of the pressure device;

[0020] Figure 3 It is a schematic diagram of the overall structure of a pressure device for secondary recycling of liquid packaging boxes;

[0021] Figure 4 It is an overall cross-sectional view of a pressure device for secondary recycling of liquid packaging boxes;

[0022] Figure 5ais a schematic diagram of the structure of the transmission component;

[0023] Figure 5b It is a structural schematic diagram of the transmission component from another perspective;

[0024] Figure 6 is a schematic diagram of the structure of the cutting assembly;

[0025] Figure 7 It is a schematic diagram of the structure of the emptying bag assembly;

[0026] Figure 8 It is a schematic diagram of the structure of the lifting component;

[0027] Fig. 9 It is a schematic diagram of the structure of the content delivery component;

[0028] Fig.10 It is a structural schematic diagram of the automatic cleaning component.

[0029] Figure numerals: 1-conveyor belt, 2-cutting assembly, 3-pressure device, 4-emptying bag assembly, 5-primary filtering assembly, 6-storage bin, 7-content conveying assembly, 8-automatic cleaning assembly, 9-transmission assembly, 11-cutting roller, 12-feeding roller, 13-first anti-winding scraper, 14-second anti-winding scraper, 15-fixing bolt, 16-cutter, 17-fixed squeezing roller, 18-floating squeezing roller, 19-fixed squeezing roller bearing chamber, 20-floating squeezing roller bearing chamber, 21-floating device, 23-fixed plate, 24-bag discharge slide plate, 25-filter screen, 26-filter screen frame, 27-pre-pump filter, 28-content conveying pump, 29-connecting Take over, 30-pump post-filter, 31-drain valve, 32-cleaning upper cover, 33-cleaning pipeline, 34-rotating nozzle, 35-fixed nozzle, 36-main motor, 37-main reducer, 38-transmission V-belt, 39-transition transmission device, 40-primary transmission chain, 41-secondary transmission chain, 42-tertiary transmission chain, 43-chain tensioning device, 44-sliding bearing chamber, 45-lower guide rail, 46-upper guide rail, 47-floating spring, 48-T-type screw, 49-inner limit bolt, 50-outer limit bolt, 51-active lifting roller, 52-driven lifting roller, 53-belt, 54-lifting fin, 55-vibrating screen, 56-baffle. DETAILED DESCRIPTION

[0030] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0031] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0032] Embodiment 1

[0033] In order to conveniently describe the structure of the pressure device in this embodiment, it is installed in the secondary recovery device for liquid packaging boxes and described as a whole to facilitate understanding of its working principle and technical solution.

[0034] See also Figure 3 and Figure 4 , a liquid packaging box secondary recycling device, comprising:

[0035] A housing, wherein a waste bag feed port is disposed on the upper portion of the housing, and a cutting assembly 2, a pressure device 3, a bag emptying assembly 4 and a main motor 36 are sequentially disposed inside the housing from top to bottom;

[0036] See also Figure 2 The pressure device 3 comprises: a fixed squeezing roller 17, a floating squeezing roller 18 and a floating device 21. The fixed squeezing roller 17 is installed in the housing through a fixed squeezing roller bearing chamber 19, and the floating squeezing roller 18 is installed in the housing through the floating device 21. The fixed squeezing roller 17 and the floating squeezing roller 18 are both driven to rotate by a main motor 36 through a transmission chain. The floating squeezing roller 18 can slide left and right through the floating device 21.

[0037] Please note that Figure 5a and Figure 5bIn this embodiment, the power transmission of the main motor 36 is realized through the main reducer 37, the transmission V-belt 38, the transition transmission device 39, the primary transmission chain 40, the secondary transmission chain 41, and the tertiary transmission chain 42, which are used to drive the rotation of the cutting assembly 2 and the pressure device 3; the main reducer 37, the transmission V-belt 38, the transition transmission device 39, the primary transmission chain 40, the secondary transmission chain 41, and the tertiary transmission chain 42 are collectively referred to as the transmission assembly 9; that is, the main motor 36 rotates, and the transmission V-belt 38 drives the main reducer 37 to rotate, and the main reducer 37 drives the cutting assembly 2 and the pressure device 3 to rotate through the primary transmission chain 40, the secondary transmission chain 41, and the tertiary transmission chain 42;

[0038] See also Figure 1 There are two floating devices 21, which are respectively arranged on both sides of the shell and connected to the two ends of the floating squeeze roller 18; the floating device 21 includes: a floating squeeze roller bearing chamber 20, a sliding bearing chamber 44 and a reset device; the sliding bearing chamber 44 is fixed to the outside of the shell, and the upper and lower sides of the sliding bearing chamber 44 are respectively provided with an upper guide rail 46 and a lower guide rail 45; the floating squeeze roller bearing chamber 20 is installed on one end of the floating squeeze roller 18, and is slidably installed in the sliding bearing chamber 44 through the upper guide rail 46 and the lower guide rail 45; the reset device is installed in the sliding bearing chamber 44 to provide a reset force for the floating squeeze roller bearing chamber 20.

[0039] In this embodiment, specifically, the reset device includes: a floating spring 47, an inner limit bolt 49 and an outer limit bolt 50; the inner limit bolt 49 and the outer limit bolt 50 are installed in the sliding bearing chamber 44, and are respectively located on both sides of the floating squeeze roller bearing chamber 20; one end of the floating spring 47 is connected to the floating squeeze roller bearing chamber 20, and the other end is connected to the inner wall of the sliding bearing chamber 44;

[0040] During operation, the floating squeeze roller bearing chamber 20 is pressed on the outer limit bolt 50 under the action of the floating spring 47. When a hard object enters, the hard object pushes the floating squeeze roller 18 to move inward, thereby driving the floating squeeze roller bearing chamber 20 to move inward, thereby compressing the floating spring 47, so that the gap between the floating squeeze roller 18 and the fixed squeeze roller 17 becomes larger, allowing the hard object to pass through, thereby protecting the roller surface of the floating squeeze roller 18 and the fixed squeeze roller 17 from damage; the inner limit bolt 49 acts as an inner limit to avoid excessive compression of the spring.

[0041] In this embodiment, it should be noted that, in order to ensure the normal rotation of the floating squeeze roller 18, a corresponding chain tensioning device 43 is also provided on the transmission chain.

[0042] In this embodiment, specifically, the other end of the floating spring 47 is connected to the inner wall of the sliding bearing chamber 44 through an adjusting device; the adjusting device is a T-type lead screw 48, and the T-type lead screw 48 is installed on the wall of the sliding bearing chamber 44 through a threaded section and a nut, and the floating spring 47 is connected to the T-type section of the T-type lead screw 48, and the compression degree of the floating spring 47 can be adjusted through the threaded section and the nut; that is, the extrusion capacity of the pressure device 3 can be improved through the adjusting device, while preventing hard objects such as covers from causing damage to the extrusion roller.

[0043] In this embodiment, specifically, a conveyor belt 1 may be further provided to convey the packaging boxes to be processed to the waste package feed port through the conveyor belt 1, thereby avoiding manual up and down carrying and improving production efficiency and operational safety.

[0044] Embodiment 2

[0045] Embodiment 2 is a further description of Embodiment 1, and the same components are not repeated here. Figure 6 As shown, the cutting assembly 2 comprises:

[0046] A cutting roller 11, a feeding roller 12 and an anti-winding scraper; the cutting roller 11 and the feeding roller 12 are both installed in the housing through bearings, and are driven to rotate by a main motor 36 through a transmission chain; the anti-winding scraper is fixed in the housing through a fixing bolt 15, and is located below the cutting roller 11 and the feeding roller 12; a plurality of cutters 16 are provided on the cutting roller 11, and a plurality of protrusions are provided on the feeding roller 12; the cutters 16 are used to cut incisions in the packaging box; the protrusions are used to puncture the packaging box.

[0047] When in use, the cutting roller 11 and the discharging roller 12 rotate towards each other to cut the packaging box that falls on top, make incisions and puncture the packaging box, so that the contents flow out at the incisions; the anti-winding scraper (two are provided in this embodiment, namely the first anti-winding scraper 13 and the second anti-winding scraper 14, which are respectively used to clean the cutting roller 11 and the discharging roller 12) is responsible for cleaning the cutting roller 11 and the discharging roller 12 to prevent the packaging box from sticking to the cutting roller 11 and the discharging roller 12.

[0048] That is, in this embodiment, the cutting component 2 adopts a structure that combines cutting and piercing to improve the efficiency of cutting the packaging box.

[0049] Embodiment 3

[0050] Embodiment 3 is a further explanation of Embodiment 2. The same components are not described here again. Figure 7 , the bag emptying assembly 4 includes: a fixing plate 23 and a bag emptying slide plate 24;

[0051] The fixed plate 23 is installed on the inner wall of the shell; the package discharge slide plate 24 is installed on the fixed plate 23; a package discharge opening is opened on the shell and at the end of the package discharge slide plate 24; the package discharge slide plate 24 is formed by a plurality of smooth round steels arranged at intervals; that is, the package discharge slide plate 24 is formed by staggered arrangement and welding of round steels, which can effectively separate the contents from the packaging box to prevent the contents from flowing out on the one hand, and is convenient for cleaning on the other hand.

[0052] In this embodiment, it should be noted that the cutting assembly 2 realizes the primary separation of the packaging box and the contents, the pressure device 3 realizes the secondary separation of the packaging box and the contents, and the package discharge slide 24 realizes the tertiary separation of the packaging box and the contents; the separated contents can be recycled as feed raw materials, or for other purposes, which can enhance the reuse of resources, and the separated empty packages can be separated from the raw materials by some existing separation devices for secondary utilization. However, in actual application, it is found that a large amount of contents are still attached to the empty packages after being discharged by the package discharge slide 24, especially when the viscosity of the contents is relatively high. This leads to waste of contents on the one hand, and on the other hand, it will lead to the reproduction of microorganisms for a long time, causing secondary pollution to the empty packages.

[0053] Based on the above problems, the inventors conducted in-depth research and found that there are two reasons: one is that the empty packages and the contents have a secondary contact on the package discharge slide 24, and the other is that the packaging boxes stay on the package discharge slide 24 for a short time and cannot be fully separated; therefore, based on the above problems and reasons, this embodiment further adds a lifting component to the pressure device, which on the one hand increases the time that the packaging boxes stay on the package discharge slide 24, and on the other hand avoids the empty packages and the contents from having a secondary contact on the package discharge slide 24. At the same time, the lifting device is used to shake the packaging boxes up and down for further separation.

[0054] In this example, see Figure 8 The lifting assembly includes: an active lifting roller 51, a driven lifting roller 52 and a belt 53; the active lifting roller 51 and the driven lifting roller 52 are installed inside the housing through bearings and are located below the bag discharge slide 24; the active lifting roller 51 is driven to rotate by the auxiliary motor; the belt 53 is installed on the active lifting roller 51 and the driven lifting roller 52; a plurality of lifting fins 54 are arranged on the belt 53 and at positions corresponding to the gaps between the smooth round steels, and the lifting fins 54 extend from the gaps between the smooth round steels;

[0055] In this embodiment, specifically, the upper ends of the lifting fins 54 arranged on the belt 53 and at positions corresponding to the gap between the two smooth round steels are all higher than the upper surface of the smooth round steels, and the lengths of the lifting fins 54 are different, and a length difference is set.

[0056] That is, during use, the auxiliary motor drives the belt 53 to operate, thereby driving the lifting fin 54 to move upward continuously along the gap; thereby driving the packaging box at the bottom to move upward along the packaging discharge slide 24, that is, increasing the time that the packaging box stays on the packaging discharge slide 24, thereby making the separation more complete; at the same time, since the height of the lifting fins 54 is higher than the packaging discharge slide 24, the packaging box squeezed by the pressure device 3 will not directly contact the packaging discharge slide 24 after falling, and will not have a second contact with the contents squeezed by the pressure device 3; and because the lengths of the lifting fins 54 are different, the packaging box, under the action of the lifting fins 54, when the packaging discharge slide 24 moves upward, will undergo a gradient change under the action of gravity, that is, it will fall from the long lifting fin 54 to the short lifting fin 54, thereby oscillating, thereby achieving four-level separation of the packaging box and the contents.

[0057] In this embodiment, in order to further improve the separation effect, a vibrating screen 55 is also provided. The vibrating screen 55 is arranged at the end of the package discharge slide plate 24 and is arranged at an angle; the end of the vibrating screen 55 is connected to the package discharge port; that is, the vibrating screen 55 can achieve five-level separation of the packaging box and the contents.

[0058] In the present embodiment, specifically, in order to further ensure the separation effect brought by the lifting assembly, a baffle 56 and a telescopic cylinder are further provided, wherein the baffle 56 is installed inside the shell through a torsion spring and a bearing, and is located above the package discharge slide plate 24; in the initial state of the torsion spring, the baffle 56 is beveled toward the package discharge port; the torsion spring provides a reset force for the baffle 56; one end of the telescopic cylinder is installed on the inner wall of the shell, and the other end is installed on the baffle 56, and under the action of the telescopic cylinder, the baffle 56 can be actively rotated; it should be noted that the distance between the baffle 56 and the lifting fin 54 can be determined according to actual conditions; therefore, by providing the baffle 56, the problem of the packaging boxes located on the upper layer not passing through the lifting assembly but directly sliding to the vibrating screen 55 can be avoided; at the same time, by providing the telescopic cylinder, when there is a serious accumulation of packaging boxes, the baffle 56 can be actively opened to a certain angle to increase the flow rate, thereby alleviating the serious accumulation of packaging boxes.

[0059] Embodiment 4

[0060] Embodiment 4 is a further description of Embodiment 3. The same components are not described here again. Figure 7 and Fig. 9 , a primary filter assembly 5 is arranged at the bottom of the shell and below the lifting assembly and the vibrating screen 55, the primary filter assembly 5 comprising: a filter screen 25 and a filter screen 25 frame; a storage bin 6 is arranged below the primary filter assembly 5; a content conveying assembly 7 is arranged in the storage bin 6; preferably, the primary filter assembly 5 and the emptying bag assembly 4 can adopt a bolt-free installation structure, which can realize quick disassembly, cleaning and maintenance;

[0061] The content delivery assembly 7 includes: a pre-pump filter 27, a content delivery pump 28, a connecting pipe 29, a post-pump filter 30, and a sewage valve 31; the input end of the content delivery pump 28 is connected to the storage bin 6 through a pipeline, and the output end of the content delivery pump 28 is connected to the post-pump filter 30 through the connecting pipe 29; the pre-pump filter 27 is installed on the pipeline between the storage bin 6 and the content delivery pump 28; a sewage pipeline is provided on the pipeline between the storage bin 6 and the pre-pump filter 27, and the sewage valve 31 is provided on the sewage pipeline;

[0062] That is, the contents separated by the emptying bag assembly 4 fall onto the filter screen 25, the filtered contents fall down, and large particles of impurities remain above the filter screen 25, thereby achieving primary filtration of the contents, and then secondary filtration is performed through the pre-pump filter 27, and then tertiary filtration is performed through the post-pump filter 30, that is, a three-stage filtration structure is adopted, which greatly improves the service life of the content delivery pump 28.

[0063] During use, when the content in the storage bin 6 reaches a certain amount, the content delivery pump 28 is started, the content passes through the pre-pump filter 27 to reach the content delivery pump 28, enters the connecting pipe 29 after being pressurized by the content delivery pump 28, and is finally delivered to the designated location through the post-pump filter 30.

[0064] Embodiment 5

[0065] Embodiment 5 is a further description of Embodiment 4, and the same components are not repeated here. Figure 4 and Fig.10 In this embodiment, a cleaning component is further added; the cleaning component includes: a cleaning cover 32, a cleaning pipeline 33, a 360° rotating nozzle 34, and a fixed nozzle 35; the 360° rotating nozzle 34 and the fixed nozzle 35 are both arranged on the cleaning pipeline 33; there are several fixed nozzles 35, which are distributed on both sides of the cutting device, the extrusion device, and the emptying bag component 4; there are two 360° rotating nozzles 34, which are distributed in the storage bin 6 and the waste bag feed port;

[0066] That is, after all the cutting operations of the packaging box are completed, the cleaning cover 32 is covered (it should be noted that Figure 1 The triangular object at the top is the material stopper, which can be directly removed after all the cutting operations of the packaging box are completed, and then the cleaning cover 32 can be covered). The cleaning pipeline 33 is connected, and the cleaning liquid is transported from the outside to the cleaning pipeline 33, and then sprayed out by the 360° rotating nozzle 34 and the fixed nozzle 35 to clean the inside; at the same time, after the cleaning component is cleaned, the sewage can be discharged through the sewage valve 31.

[0067] In this embodiment, specifically, the cleaning pipeline 33 can also be directly connected to the CIP station to achieve automatic cleaning of the inside of the pressure device and the pipeline.

[0068] In this embodiment, it should also be noted that all openings of the housing are sealed with sealing rings and sealing gasket structures to prevent liquid contents or cleaning fluid from spilling out.

[0069] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

[0070] This background section is provided to generally present the context of the invention, and the work of the presently named inventors, the work to the extent described in this background section, and aspects of this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art to the present invention.

Claims

1. A pressure device for secondary recycling of liquid packaging boxes, characterized in that: The pressure device (3) can be installed in the housing of the liquid packaging box secondary recovery device and is used to press the packaging box; A waste bag feed port is provided above the shell, and a cutting assembly (2), a pressure device (3), a bag emptying assembly (4), a main motor (36) and a lifting assembly are sequentially arranged inside the shell from top to bottom; The pressure device (3) specifically comprises: a fixed squeezing roller (17), a floating squeezing roller (18) and a floating device (21); The fixed squeezing roller (17) is installed in the housing via a fixed squeezing roller bearing chamber (19), and the floating squeezing roller (18) is installed in the housing via a floating device (21); the fixed squeezing roller (17) and the floating squeezing roller (18) are both driven to rotate by a main motor (36) via a transmission chain; the floating squeezing roller (18) can slide left and right via the floating device (21); The floating device (21) comprises: a floating squeeze roller bearing chamber (20), a sliding bearing chamber (44) and a reset device; the sliding bearing chamber (44) is fixed outside the housing, and the sliding bearing chamber (44) is provided with an upper guide rail (46) and a lower guide rail (45) on the upper and lower sides respectively; the floating squeeze roller bearing chamber (20) is installed on one end of the floating squeeze roller (18), and is slidably installed in the sliding bearing chamber (44) through the upper guide rail (46) and the lower guide rail (45); the reset device is installed in the sliding bearing chamber (44) to provide a reset force for the floating squeeze roller bearing chamber (20); The reset device comprises: a floating spring (47), an inner limit bolt (49) and an outer limit bolt (50); the inner limit bolt (49) and the outer limit bolt (50) are installed in the sliding bearing chamber (44) and are respectively located on both sides of the floating squeeze roller bearing chamber (20); one end of the floating spring (47) is connected to the floating squeeze roller bearing chamber (20), and the other end is connected to the inner wall of the sliding bearing chamber (44); The bag emptying assembly (4) comprises: a fixing plate (23) and a bag emptying slide plate (24); The fixing plate (23) is mounted on the inner wall of the shell; the bag discharging slide plate (24) is mounted on the fixing plate (23); a bag discharging opening is provided on the shell at the end of the bag discharging slide plate (24); the bag discharging slide plate (24) is formed by a plurality of smooth round steels arranged at intervals; The lifting assembly comprises: an active lifting roller (51), a driven lifting roller (52) and a belt (53); the active lifting roller (51) and the driven lifting roller (52) are installed inside a housing through bearings and are located below a bag discharge slide plate (24); the active lifting roller (51) is driven to rotate by an auxiliary motor; the belt (53) is installed on the active lifting roller (51) and the driven lifting roller (52); a plurality of lifting fins (54) are arranged on the belt (53) at positions corresponding to the gaps between the smooth round steels, and the lifting fins (54) extend from the gaps between the smooth round steels; The upper ends of the lifting fins (54) arranged on the belt (53) and at positions corresponding to the gap between the two smooth round steels are all higher than the upper surface of the smooth round steels, and the lengths of the lifting fins (54) are different, and the length differences are set.

2. A pressure device for secondary recycling of liquid packaging boxes according to claim 1, characterized in that: There are two floating devices (21) in total, which are respectively arranged on both sides of the shell and connected to the two ends of the floating squeezing roller (18).

3. A pressure device for secondary recycling of liquid packaging boxes according to claim 2, characterized in that: When the pressure device (3) is in operation, the floating squeeze roller bearing chamber (20) is pressed onto the outer limit bolt (50) under the action of the floating spring (47). When a hard object enters, the hard object pushes the floating squeeze roller (18) to move inward, thereby driving the floating squeeze roller bearing chamber (20) to move inward, thereby compressing the floating spring (47), thereby increasing the gap between the floating squeeze roller (18) and the fixed squeeze roller (17), allowing the hard object to pass through; the inner limit bolt (49) plays an inner limit role.

4. A pressure device for secondary recycling of liquid packaging boxes according to claim 3, characterized in that: The other end of the floating spring (47) is connected to the inner wall of the sliding bearing chamber (44) through an adjusting device; the compression degree of the floating spring (47) can be adjusted through the adjusting device.

5. A pressure device for secondary recycling of liquid packaging boxes according to claim 4, characterized in that: The adjusting device is a T-shaped lead screw (48), which is mounted on the wall of the sliding bearing chamber (44) through a threaded section and a nut, and a floating spring (47) is connected to the T-shaped section of the T-shaped lead screw (48).

6. A pressure device for secondary recycling of liquid packaging boxes according to claim 1, characterized in that: A chain tensioning device (43) is provided on the transmission chain.

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