A plastic sheet film dewaterer

Abstract

The utility model discloses a kind of plastic sheet film dehydrator, comprising: rack and box, screen mesh cylinder is provided in the dehydration inner cavity of box;Left side wall of box is fixed with left part feed tank, and the feed chamber of left part feed tank is cylindrical inner cavity structure, and feed chamber is communicated with the inner cavity of screen mesh cylinder;Feed channel is vertically arranged on the tangent position of feed chamber on left part feed tank;Right side wall of box is fixed with right part discharge tank, and the discharge chamber of right part discharge tank is cylindrical inner cavity structure, and discharge chamber is communicated with the inner cavity of screen mesh cylinder;Discharge channel is vertically arranged on the tangent position of feed chamber on right part discharge tank;It further includes that material conveying dehydration discharge device is sent to discharge chamber after material in feed chamber is conveyed from left to right and is thrown out of discharge channel outside.The above equipment has the advantages of continuous dehydration, small plastic sheet loss, stable equipment operation, small energy consumption and the like.

Description

Technical Field

[0001] This utility model relates to the field of waste plastic recycling technology, and in particular to a plastic sheet / film dehydrator. Background Technology

[0002] The process of processing waste plastics into usable plastic sheets involves multiple steps, including sorting, crushing, washing, dehydration, air separation, and bagging. Among these steps, dehydration is a crucial one. If the plastic sheets entering the final bagging stage contain too much moisture, it will affect their recycling efficiency. Therefore, employing effective dehydration methods is essential.

[0003] Currently, the most common plastic sheet dewatering machines on the market for dehydrating thin-film plastic sheets have the following structure: a box with a dewatering inner cavity, a screen cylinder installed in the dewatering inner cavity, a spiral shaft supported by a bearing assembly inside the screen cylinder, and the spiral shaft being driven to rotate by a drive motor or a combination of a drive motor and a belt drive; the box has an inlet and an outlet that communicate with the inner cavity of the screen cylinder, and the outlet is equipped with a pneumatic conveying structure to pneumatically convey the plastic sheet inside the screen cylinder out.

[0004] The above-mentioned plastic sheet / film dewatering machine has the following drawbacks: First, after the plastic sheet enters the screen cylinder through the feed inlet, it is pushed and conveyed for dewatering by the spiral blades on the spiral shaft, resulting in high conveying resistance at the feed point; second, a lot of powder is generated during the dewatering process using spiral blades, leading to significant plastic sheet loss, and the pushing resistance is also high, which inevitably increases energy consumption; third, a pneumatic conveying structure is required for material discharge, resulting in high energy consumption. Utility Model Content

[0005] To address the shortcomings of existing technologies, the technical problem to be solved by this utility model is to provide a plastic sheet film dewatering machine that allows for rapid inflow and outflow of plastic sheets, generates less powder and has low resistance during the plastic sheet conveying and dewatering process. This plastic sheet film dewatering machine relies on centrifugal force for discharge, eliminating the need for an additional pneumatic conveying structure for discharge.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A plastic sheet / film dewatering machine includes: a box body with a dewatering inner cavity, the box body being supported on a frame; a screen cylinder is horizontally arranged in the dewatering inner cavity of the box body, the left end opening of the screen cylinder is fixed to the left side wall of the dewatering inner cavity, the right end opening of the screen cylinder is fixed to the right side wall of the dewatering inner cavity, and there is a gap between the outer wall of the screen cylinder and the inner wall of the dewatering inner cavity, the space of which is the outer chamber surrounding the screen cylinder; at this time, the dewatering inner cavity of the box body is divided into two spaces by the screen cylinder, one space is the inner cavity of the screen cylinder, and the other space is the outer chamber.

[0007] The left side wall of the box has a left through hole that communicates with the left end opening of the screen cylinder; a left feed box is fixedly installed on the left side wall of the box, the feed chamber of the left feed box has a cylindrical inner cavity structure, and a right end connection port is opened on the right side wall of the left feed box to communicate with the inner cavity of the screen cylinder; a feed channel is vertically provided on the left feed box, and the feed channel is located at the tangent position of the feed chamber; The right side wall of the box has a right through hole that communicates with the right end opening of the screen cylinder. A right discharge box is fixedly installed on the right side wall of the box. The discharge chamber of the right discharge box has a cylindrical inner cavity structure, and a left end connection port is opened on the left side wall of the right discharge box to communicate with the inner cavity of the screen cylinder. A discharge channel is vertically provided on the right discharge box, and the discharge channel is located at the tangent position of the infeed chamber. The feeding chamber, the inner cavity of the screen cylinder, and the discharge chamber are equipped with a material conveying, dehydration, and discharge device that sends the plastic sheet entering the feeding chamber into the screen cylinder for dehydration, and then sends it to the discharge chamber and throws it out of the discharge channel.

[0008] Furthermore, in the aforementioned plastic sheet / film dewatering machine, the structure of the material conveying, dewatering, and discharging device is as follows: a main shaft is arranged horizontally in the left and right directions in the feeding chamber, the inner cavity of the screen cylinder, and the discharging chamber. A left support shaft is provided on the left side of the main shaft. The left support shaft passes through a through hole on the left side wall of the left feed box and is supported by a left bearing seat mounted on the frame. A right support shaft is provided on the right side of the main shaft. The right support shaft passes through the through hole on the right side wall of the right discharge box and is supported by the right bearing seat mounted on the frame. The main shaft is driven to rotate by a drive device; Several conveying blades are arranged from left to right on the main shaft to transport the plastic sheet entering the feeding chamber from left to right to the discharging chamber and to dehydrate the plastic sheet during the conveying process; A rotating blade assembly is provided on the right support shaft. The tangential position of the discharge channel allows the rotating blade assembly to throw the plastic sheet entering the discharge chamber out of the discharge channel during the rotation of the main shaft driven by the drive device. This structural design allows the plastic sheet to be discharged quickly by its own inertial force, thus eliminating the need for pneumatic conveying structure as in traditional equipment.

[0009] Furthermore, in the aforementioned plastic sheet / film dehydrator, the drive device is structured as follows: a drive motor is fixedly mounted on the frame, the output shaft of the drive motor is fixedly connected to the input shaft of the synchronous belt drive, and the right support shaft extending out of the right side of the right bearing seat is fixedly connected to the output shaft of the synchronous belt drive.

[0010] Furthermore, in the aforementioned plastic sheet film dewatering machine, every two conveying blades form a set of conveying blades, and the two conveying blades in each set of conveying blades are rotationally symmetrical about the axis of the main shaft. Each conveying blade in each set of conveying blades is inclined relative to the axis of the main shaft, and the inclination angle α is 30±5°. Each set of conveyor blades is evenly spaced from left to right on the main shaft. Starting from the second set of conveyor blades, each set of conveyor blades rotates relative to the adjacent left-side conveyor blade set in the same direction of rotation by a deviation angle β, which is 60°.

[0011] Furthermore, in the aforementioned plastic sheet / film dewatering machine, the structure of the rotating blade assembly is as follows: a fixed disk is fixedly installed on the right support shaft, and several rotating blades are installed on the left end face of the fixed disk. The root of each rotating blade is fixed to the right support shaft, the right end of each rotating blade is fixed to the fixed disk, and the rotating blades are evenly spaced around the right support shaft.

[0012] Furthermore, in the aforementioned plastic sheet / film dewatering machine, the number of rotating blades is four; The rotating blade is located on the normal line at the intersection of the rotating blade and the right support shaft, and the center plane of the rotating blade and the axis of the right support shaft are in the same plane.

[0013] Furthermore, in the aforementioned plastic sheet / film dewatering machine, the screen cylinder is a cylindrical structure with a regular polygonal cross-section, and the number of sides of the regular polygon is ≥10. The regular polygonal structure can prevent the plastic sheet from rubbing, slipping, and accumulating material.

[0014] A more preferred embodiment is that the screen cylinder is a cylindrical structure with a regular dodecagonal cross-section.

[0015] Furthermore, in the aforementioned plastic sheet / film dewatering machine, a plurality of sealed water inlet pipes are provided on the top of the housing, which are inserted into the top of the housing. The inlet of each water inlet pipe is located outside the housing and is connected to the main water inlet pipe. The outlet of each water inlet pipe is located in the outer chamber, and the outlet of each water inlet pipe is connected to a rinsing pipe assembly suspended above the screen cylinder. The rinsing pipe assembly has a plurality of rinsing holes for rinsing the screen cylinder.

[0016] Furthermore, in the aforementioned plastic sheet / film dewatering machine, the bottom of the housing has a bottom outlet communicating with the dewatering cavity, and a sludge hopper is connected to the lower part of the housing, with the bottom outlet communicating with the top inlet of the sludge hopper.

[0017] The beneficial effects of this utility model are as follows: First, through the design of the layout of each conveying blade, the structure of the rotating blade group, and the hollow structure of the main shaft, the rotation speed of the main shaft is faster than that of a screw shaft. The high-speed rotation of the main shaft, combined with the rapid feeding in the tangential direction, the centrifugal conveying and dehydration of the screw, and the rapid discharge in the tangential direction, improves the dehydration efficiency. In addition, the overall structure can maintain dynamic balance, making the equipment operation more stable. Second, through the layout design of each conveying blade, less powder is generated during the conveying and dehydration process of the plastic sheet, resulting in less plastic sheet loss. In addition, the pushing resistance is also greatly reduced, effectively reducing energy consumption. Third, through the cooperation of each rotating blade group with the discharge channel located in the tangential direction, the plastic sheet is thrown out for discharge. Therefore, the plastic sheet discharge does not require an additional pneumatic conveying structure, which optimizes the structure and further reduces energy consumption. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a plastic sheet / film dewatering machine according to the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of a plastic sheet / film dewatering machine according to the present invention.

[0020] Figure 3 yes Figure 2 A magnified schematic diagram of part A in the middle.

[0021] Figure 4 yes Figure 2 A magnified schematic diagram of the structure of part G in the middle section.

[0022] Figure 5 yes Figure 2 A schematic diagram of the central spindle.

[0023] Figure 6 yes Figure 5 A schematic diagram of the main shaft and the first set of conveyor blades in the BB section.

[0024] Figure 7 yes Figure 5 A schematic diagram of the main shaft and the second set of conveyor blades in the CC section.

[0025] Figure 8 yes Figure 5 A schematic diagram of the main shaft and the third set of conveyor blades in the DD section.

[0026] Figure 9 yes Figure 5 A schematic diagram of the main shaft and rotating blade assembly in the EE section.

[0027] Figure 10 yes Figure 5 A partially enlarged structural diagram.

[0028] Figure 11 yes Figure 2 A schematic diagram of the structure in the FF section.

[0029] in: 1. Chamber; 11. Left side wall of the dewatering chamber; 12. Right side wall of the dewatering chamber; 13. Inner wall of the dewatering chamber; 14. Left through hole; 15. Right through hole; 16. Sewage hopper; 17. Outer chamber; 2. Machine frame; 3. Screen cylinder; 4. Left feed box; 41. Feed chamber; 42. Right end connection port; 43. Feed channel; 431. Top feed port; 432. Inspection door; 5. Right-side discharge box; 51. Discharge chamber; 52. Left-side connection port; 53. Discharge channel; 531. Top discharge port; 54. Second small hole; 6. Main shaft; 61. Left support shaft; 611. First connecting assembly; 62. Right support shaft; 621. Second connecting assembly; 63. Conveyor blade; 6301. First conveyor blade group; 6302. Second conveyor blade group; 6303. Third conveyor blade group; 631. Blade back plate; 632. Blade; 64. Rotating blade group; 641. Fixed disk; 642. Rotating blade; 643. Center surface; 71. Left bearing housing; 72. Right bearing housing; 8. Drive motor; 81. Synchronous belt drive; 82. Protective housing; 821. Mounting components; 822. Heat dissipation grille; 9. Main water inlet pipe; 91. Water inlet pipe; 92. Flushing pipe assembly. Detailed Implementation

[0030] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0031] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0032] For ease of description, this embodiment uses Figure 2 The left-hand direction shown is defined as "left". Figure 2The right-hand direction shown is defined as "right". Figure 2 The area above is defined as "above". Figure 2 The term "down" is defined as "below" in this embodiment, and all definitions involving "left", "right", "up" and "down" shall be based on this.

[0033] It should be noted that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in this embodiment, a plastic sheet / film dewatering machine includes: a housing 1 with a dewatering inner cavity, the housing 1 being supported on a frame 2. A screen cylinder 3 is disposed within the dewatering inner cavity of the housing 1, the screen cylinder 3 being horizontally placed. The left end opening of the screen cylinder 3 is fixed to the left side wall 11 of the dewatering inner cavity, and the right end opening of the screen cylinder 3 is fixed to the right side wall 12 of the dewatering inner cavity. A gap exists between the outer wall of the screen cylinder 3 and the inner wall 13 of the dewatering inner cavity, forming a peripheral chamber 17 surrounding the screen cylinder 3. Thus, the dewatering inner cavity of the housing 1 is divided into two spaces by the screen cylinder 3: one space is the inner cavity of the screen cylinder 3, and the other space is the peripheral chamber 17.

[0035] A more preferred embodiment is that the bottom of the housing 1 has a bottom outlet communicating with the dehydration inner cavity, and a sludge hopper 16 is connected to the lower part of the housing 1, with the bottom outlet communicating with the top inlet of the sludge hopper 16. Water extracted from the plastic sheet enters the outer chamber 17 through the screen holes on the screen cylinder 3, and then collects in the sludge hopper 16. A sludge outlet is provided on the sludge hopper 16, which can be connected to a sludge pipe, and a sludge valve can also be provided at the sludge outlet. The sludge valve can be open or opened at a time.

[0036] like Figure 1 , Figure 2 and Figure 3As shown, the left side wall of the box body 1 has a left through hole 14 that communicates with the left end opening of the screen cylinder 3; a left feed box 4 is fixedly installed on the left side wall of the box body 1, the feed chamber 41 of the left feed box 4 has a cylindrical inner cavity structure, and a right end connection port 42 is opened on the right side wall of the left feed box 4 to communicate with the inner cavity of the screen cylinder 3; a feed channel 43 is vertically arranged on the left feed box 4, and the feed channel 43 is located at the tangent position of the feed chamber 41. At this time, the top opening of the feed channel 43 is the top feed port 431 of the feed channel 43.

[0037] like Figure 1 , Figure 2 and Figure 4 As shown, the right side wall of the box body 1 has a right through hole 15 that communicates with the right end opening of the screen cylinder 3. A right discharge box 5 is fixedly installed on the right side wall of the box body 1. The discharge chamber 51 of the right discharge box 5 has a cylindrical inner cavity structure, and a left end connection port 52 is opened on the left side wall of the right discharge box 5 to communicate with the inner cavity of the screen cylinder 3. A discharge channel 53 is vertically arranged on the right discharge box 5, and the discharge channel 53 is located at the tangent position of the inlet chamber 51. At this time, the top opening of the discharge channel 53 is the top discharge port 531 of the discharge channel 53.

[0038] The feeding chamber 41, the inner cavity of the screen cylinder 3, and the discharge chamber 51 are equipped with a material conveying, dehydration and discharge device that sends the plastic sheet entering the feeding chamber 41 into the screen cylinder 3 for dehydration, and then sends it to the discharge chamber 51 and throws it out of the discharge channel.

[0039] like Figure 2 and Figure 5 As shown, the structure of the material conveying, dewatering, and discharging device in this embodiment is as follows: a main shaft 6 is horizontally arranged in the feed chamber 41, the inner cavity of the screen cylinder 3, and the discharge chamber 51; a left support shaft 61 is provided on the left side of the main shaft 6, and the left support shaft 61 passes through a through hole on the left side wall of the left feed box 4 and is supported by a left bearing seat 71 mounted on the frame 2. A right support shaft 62 is provided on the right side of the main shaft 6, and the right support shaft 62 passes through a through hole on the right side wall of the right discharge box 5 and is supported by a right bearing seat 72 mounted on the frame 2.

[0040] When the spindle 6 is solid, the left support shaft 61, the spindle 6, and the right support shaft 62 can be integrally machined. However, considering factors such as energy consumption, material consumption, and drive motor selection, the spindle 6 is preferably designed as a hollow shaft structure. Given the hollow structure of the spindle 6, the left support shaft 61, the spindle 6, and the right support shaft 62 can be connected by splicing. For example, a first connecting component 611 can be fixedly installed at the right end of the left support shaft 61. The first connecting component 611 is inserted into the left part of the hollow cavity of the spindle 6 from the left end and fixed in the hollow cavity of the spindle 6 by a fixing method such as welding. Similarly, a second connecting component 621 can be fixedly installed at the left end of the right support shaft 62. The second connecting component 621 is inserted into the hollow cavity of the spindle 6 from the right end and fixed in the hollow cavity of the spindle 6 by a fixing method such as welding.

[0041] The sealing methods of the left support shaft 61 (passing through the through hole on the left side wall of the left feed box 4) and the right support shaft 62 (passing through the through hole on the right side wall of the right discharge box 5) are designed to ensure sealing performance and prevent interference with the rotation of the left support shaft 61 and the right support shaft 62. The sealing methods can use sealing components such as sealing rings or oil seals. These sealing methods are conventional technologies and will not be elaborated on here.

[0042] The main shaft 4 is driven to rotate by a drive device. For example... Figure 1 and Figure 2 As shown, the drive device in this embodiment can adopt a combination of drive motor and belt drive. Specifically, a drive motor 8 is fixedly mounted on the frame 2, and the output shaft of the drive motor 8 is fixedly connected to the input shaft of the synchronous belt drive 81. A right support shaft 62 extending out from the right side of the right bearing seat 72 is fixedly connected to the output shaft of the synchronous belt drive 81. To protect the synchronous belt drive 81, a protective shell 82 is also provided. The protective shell 82 is mounted on the frame 2 via a mounting assembly 821, and a heat dissipation grid 822 is also provided on the protective shell 82. To facilitate future maintenance and repair of the belt drive, the protective shell 82 is designed as a split-type assembly structure consisting of two half-shells joined together by detachable fasteners such as bolts, facilitating disassembly and installation of the protective shell 82 and making it convenient for operators.

[0043] like Figure 2 and Figure 5As shown, in this embodiment, several conveying blades 63 are arranged from left to right on the main shaft 6 to transport the material entering the feed chamber 41 from left to right to the discharge chamber 51. During the material transport process, each conveying blade 63 simultaneously scoops up the material, causing it to dehydrate under centrifugal force. Each conveying blade 63 includes a blade back plate 631 and blades 632. Blades 632 are fixed to the blade back plate 631 using detachable fasteners such as screws. The blade back plate 631 is fixed to the main shaft 6, for example, by welding.

[0044] A more preferred approach is to arrange the conveying blades 63 in a specific configuration, such as... Figure 5 and Figure 10 As shown, every two conveying blades 63 are grouped into a conveying blade group. The two conveying blades 63 in each conveying blade group are rotationally symmetrical with respect to the axis of the main shaft 6. Each conveying blade 63 in each conveying blade group is inclined with respect to the axis of the main shaft 6, and the inclination angle α is 30±5°. The optimal inclination angle α is 30°.

[0045] like Figure 5 and Figure 11 As shown, the conveyor blade groups are evenly spaced from left to right on the main shaft 6. Starting from the second conveyor blade group, each conveyor blade group rotates relative to the adjacent left-hand conveyor blade group in the same rotational direction by a deviation angle β, which is 60°. For example, one conveyor blade group is defined as the first conveyor blade group 6301. If any conveyor blade in this group is at the 0° position, then the other conveyor blade in the group is at the 180° position. Figure 6 As shown. The conveyor blade group located to the right of the first conveyor blade group 6301 is defined as the second conveyor blade group 6302. The two conveyor blades in this group are positioned at 60° and 240°, as shown. Figure 7 As shown. The conveyor blade group located to the right of the second conveyor blade group 6302 is defined as the third conveyor blade group 6303, in which two conveyor blades are positioned at 120° and 300°, as shown. Figure 8 As shown. The blades are then arranged in the order of the angle of the first conveyor blade group 6301, the second conveyor blade group 6302, and the third conveyor blade group 6303.

[0046] like Figure 2 , Figure 5 and Figure 9 As shown, in this embodiment, a rotating blade assembly 64 is provided on the right support shaft 62 to throw the material in the discharge chamber 51 out of the discharge channel 53.

[0047] The discharge chamber 51 has two vertical tangential directions, one at the front and one at the rear. Similarly, the feed chamber 41 also has two vertical tangential directions, one at the front and one at the rear. The tangential position of the discharge channel 53 needs to ensure that the rotating blade assembly 64 can quickly throw the plastic sheet entering the discharge chamber 51 out of the discharge channel 53 during the rotation of the main shaft 6 driven by the drive device. The tangential position of the feed channel 43 needs to ensure that the plastic sheet entering the feed chamber 41 through the feed channel 43 can quickly enter the screen cylinder 3 in a vortex shape during the rotation of the main shaft 6 driven by the drive device. Since the conveying pattern formed by the conveying blades 63 on the main shaft 6 under the high-speed rotation of the main shaft 6 is centrifugal dehydration conveying along a spiral trajectory, the discharge channel 53 and the feed channel 43 cannot be on the same side at the same time; one must be on the front and the other on the rear. Inspection ports can be set on the discharge channel 53 and the feed channel 43 respectively. Inspection doors 432 are set on the inspection ports. The inspection doors 432 are in the closed state and are opened when inspection, maintenance, cleaning and other operations are required.

[0048] like Figure 5 and Figure 9 As shown, the structure of the rotating blade assembly 64 is as follows: a fixed disk 641 is fixedly installed on the right support shaft 62, and a plurality of rotating blades 642 are installed on the left end face of the fixed disk 641. The root of each rotating blade 642 is fixed to the right support shaft 62, the right end of each rotating blade 64 is fixed to the fixed disk 641, and the rotating blades 642 are evenly spaced around the right support shaft 62.

[0049] A more preferred embodiment is that the rotating blade 64 has a flat plate structure, the rotating blade 64 is located on the normal line at the intersection of the rotating blade 64 and the right support shaft 62, and the center plane 643 of the rotating blade 64 and the axis of the right support shaft 62 are in the same plane, such as... Figure 9 As shown.

[0050] A more preferred embodiment is that the number of rotating blades 642 is set to four, in which case the included angle between any two adjacent rotating blades 642 is 90°, such as... Figure 9 As shown.

[0051] The working process of the above-mentioned plastic sheet / film dewatering machine is as follows: Plastic sheets are continuously fed into the feeding channel 43 through the top inlet 431. Since the feeding channel 43 is located tangentially to the feeding chamber 41 and the entry direction is along the conveying direction of the first set of conveying blades, the plastic sheets can quickly enter the inner cavity of the screen cylinder 3 in a vortex-like manner along the tangential direction. The resistance during the entry process is very small. The plastic sheets entering the screen cylinder 3 are conveyed from left to right under the drive of each conveying blade 63. During the process of conveying from left to right, the plastic sheets pass through each conveying blade. 63 moves forward in a spiral direction. During the forward movement, the water thrown out by centrifugal force falls out of the screen cylinder 3 through the screen holes on the screen cylinder 3. The plastic sheet is then conveyed to the right into the discharge chamber 51. The plastic sheet entering the discharge chamber 51 is driven by each rotating blade 642 and thrown upward in the tangential direction. Since the discharge channel 53 is located at the tangential position along the direction of movement of the plastic sheet, the plastic sheet thrown upward in the tangential direction is thrown out through the top discharge port 531 of the discharge channel 53.

[0052] The aforementioned plastic sheet / film dewatering machine has the following advantages: First, through the design of the layout of each conveying blade 63, the structure of the rotating blade group 64, and the hollow structure of the main shaft 6, the rotation speed of the main shaft 6 is faster than that of a screw shaft. The high-speed rotation of the main shaft 6, combined with rapid feeding in the tangential direction, centrifugal conveying and dewatering by the screw, and rapid discharge in the tangential direction, improves the dewatering efficiency. In addition, the overall structure can maintain dynamic balance, making the equipment operation more stable. Second, the layout design of each conveying blade 63 reduces the amount of powder generated during the conveying and dewatering process of the plastic sheet, resulting in less plastic sheet loss. Furthermore, the pushing resistance is greatly reduced, effectively reducing energy consumption. Third, through the cooperation of each rotating blade group 64 with the discharge channel 53 located in the tangential direction, the plastic sheet is thrown out for discharge. Therefore, the discharge of the plastic sheet does not require an additional pneumatic conveying structure, which optimizes the structure and further reduces energy consumption.

[0053] Furthermore, to ensure smoother and unobstructed feeding and discharging of the plastic sheet, several second small holes 54 are provided on the right side wall of the right discharge box 5, each of which communicates with the discharge chamber 51. Similarly, several first small holes are provided on the left side wall of the left feed box 4, each of which communicates with the feed chamber 41. The arrangement of the first small holes can be found in [reference needed]. Figure 1 The arrangement of each second small hole 54.

[0054] In addition, to avoid dead corners and prevent the plastic sheet from slipping during left-to-right conveying, this embodiment designs the screen cylinder 3 as a cylindrical structure with a regular polygonal cross-section, and the number of sides of the regular polygon is ≥10. A more preferred solution is that the screen cylinder 3 is a cylindrical structure with a regular dodecagonal cross-section.

[0055] In addition, since plastic sheets inevitably carry impurities and a small amount of powder is inevitably generated during the dehydration process, the screen holes on the screen cylinder 3 are prone to clogging after long-term use. This embodiment addresses this problem by... Figure 1 , Figure 2 and Figure 11 As shown, several sealed water inlet pipes 91 are installed on the top of the housing 1, with the inlet of each pipe 91 located outside the housing 1 and connected to the main water inlet pipe 9. A valve is installed on the main water inlet pipe 9. The outlet of each pipe 91 is located in the outer chamber 17, and the outlet of each pipe 91 is connected to a rinsing pipe assembly 92 suspended above the screen cylinder 3. The rinsing pipe assembly 92 has several rinsing holes for rinsing the screen cylinder 3. The equipment can perform rinsing operations at regular intervals. During rinsing, rinsing water is continuously introduced into the main water inlet pipe 9 to rinse the screen cylinder 3, ensuring that the screen holes on the screen cylinder 3 are always unobstructed and guaranteeing the equipment's dewatering efficiency.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A plastic sheet / film dewatering machine, comprising: A box having a dehydration cavity, the box being supported on a frame; characterized in that: a screen cylinder is horizontally arranged in the dehydration cavity of the box, the left end opening of the screen cylinder is fixed to the left side wall of the dehydration cavity, the right end opening of the screen cylinder is fixed to the right side wall of the dehydration cavity, and there is a gap between the outer wall of the screen cylinder and the inner wall of the dehydration cavity, the space of which is the outer chamber surrounding the screen cylinder; The left side wall of the box has a left through hole that communicates with the left end opening of the screen cylinder; a left feed box is fixedly installed on the left side wall of the box, the feed chamber of the left feed box has a cylindrical inner cavity structure, and a right end connection port is opened on the right side wall of the left feed box to communicate with the inner cavity of the screen cylinder; a feed channel is vertically provided on the left feed box, and the feed channel is located at the tangent position of the feed chamber; The right side wall of the box has a right through hole that communicates with the right end opening of the screen cylinder. A right discharge box is fixedly installed on the right side wall of the box. The discharge chamber of the right discharge box has a cylindrical inner cavity structure, and a left end connection port is opened on the left side wall of the right discharge box to communicate with the inner cavity of the screen cylinder. A discharge channel is vertically provided on the right discharge box, and the discharge channel is located at the tangent position of the infeed chamber. The feeding chamber, the inner cavity of the screen cylinder, and the discharge chamber are equipped with a material conveying, dehydration, and discharge device that sends the plastic sheet entering the feeding chamber into the screen cylinder for dehydration, and then sends it to the discharge chamber and throws it out of the discharge channel.

2. The plastic sheet / film dewatering machine according to claim 1, characterized in that: The structure of the material conveying, dehydration and discharge device is as follows: a main shaft is arranged horizontally in the feed chamber, the inner cavity of the screen cylinder and the discharge chamber. A left support shaft is provided on the left side of the main shaft. The left support shaft passes through a through hole on the left side wall of the left feed box and is supported by a left bearing seat mounted on the frame. A right support shaft is provided on the right side of the main shaft. The right support shaft passes through the through hole on the right side wall of the right discharge box and is supported by the right bearing seat mounted on the frame. The main shaft is driven to rotate by a drive device; Several conveying blades are arranged from left to right on the main shaft to transport the plastic sheet entering the feeding chamber from left to right to the discharging chamber and to dehydrate the plastic sheet during the conveying process; A set of rotating blades is provided on the right support shaft. The tangential position of the discharge channel allows the rotating blades to throw the plastic sheet that has entered the discharge chamber out of the discharge channel during the rotation of the main shaft driven by the drive device.

3. A plastic sheet / film dewatering machine according to claim 2, characterized in that: The structure of the drive device is as follows: a drive motor is fixedly mounted on the frame, the output shaft of the drive motor is fixedly connected to the input shaft of the synchronous belt drive, and the right support shaft extending out of the right side of the right bearing seat is fixedly connected to the output shaft of the synchronous belt drive.

4. A plastic sheet / film dewatering machine according to claim 2, characterized in that: Two conveying blades form a group of conveying blades. The two conveying blades in each group are rotationally symmetrical with respect to the axis of the main shaft. Each conveying blade in each group is tilted with respect to the axis of the main shaft, and the tilt angle α is 30±5°. Each set of conveyor blades is evenly spaced from left to right on the main shaft. Starting from the second set of conveyor blades, each set of conveyor blades rotates relative to the adjacent left-side conveyor blade set in the same direction of rotation by a deviation angle β, which is 60°.

5. A plastic sheet / film dewatering machine according to claim 2, 3, or 4, characterized in that: The structure of the rotating blade assembly is as follows: a fixed disk is fixedly installed on the right support shaft, and several rotating blades are installed on the left end face of the fixed disk. The root of each rotating blade is fixed to the right support shaft, the right end of each rotating blade is fixed to the fixed disk, and the rotating blades are evenly spaced around the right support shaft.

6. A plastic sheet / film dewatering machine according to claim 5, characterized in that: The number of rotating blades is four; The rotating blade is located on the normal line at the intersection of the rotating blade and the right support shaft, and the center plane of the rotating blade and the axis of the right support shaft are in the same plane.

7. A plastic sheet / film dewatering machine according to claim 1, characterized in that: The screen cylinder is a cylindrical structure with a regular polygonal cross-section, and the number of sides of the regular polygon is ≥10.

8. A plastic sheet / film dewatering machine according to claim 7, characterized in that: The screen cylinder is a cylindrical structure with a regular dodecagonal cross-section.

9. A plastic sheet / film dewatering machine according to claim 1, characterized in that: Several sealed water inlet pipes are installed on the top of the box. The inlet of each water inlet pipe is located outside the box and is connected to the main water inlet pipe. The outlet of each water inlet pipe is located in the outer chamber and is connected to a rinsing pipe assembly suspended above the screen cylinder. The rinsing pipe assembly has several rinsing holes for rinsing the screen cylinder.

10. A plastic sheet / film dewatering machine according to claim 1 or 9, characterized in that: The bottom of the chamber has a bottom outlet that communicates with the dehydration cavity, and a sludge hopper is connected to the lower part of the chamber. The bottom outlet is connected to the top inlet of the sludge hopper.

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