A thermal paper preparation pulp fiber filtering and recycling device

Abstract

The invention discloses a pulp fiber filtering and recycling device for preparing thermal paper, relates to the technical field of pulp fiber filtering for preparing thermal paper, and comprises a recycling mechanism, wherein the recycling mechanism comprises a recycling tank, the upper surface of the recycling tank is fixedly connected with a sealing cover, the top end of the sealing cover is fixedly connected with a feed valve, and a filtering mechanism is arranged on the left side of the recycling tank; the filtering mechanism comprises an ultrafine filtering unit; the pulp fiber filtering and recycling device for preparing thermal paper, by arranging the ultrafine filtering unit, can utilize the ultrafine filtering capacity of a first annular ultrafiltration membrane, as well as centrifugal force and pressure, to quickly filter out smaller pulp fibers in a pulp water body, effectively reduce the pulp fiber content in the pulp water body, and facilitate the recycling and reuse of smaller pulp fibers, and can also reduce pulp waste in the process of preparing thermal paper, and can also reduce the pollution to the environment caused by the discharge of pulp water body.

Description

Technical Field

[0001] The invention relates to the technical field of filtration of pulp fibers for preparing thermal paper, in particular to a filtration and recovery device for pulp fibers for preparing thermal paper. Background Art

[0002] The production principle of thermal paper is to coat ordinary paper base with microparticle powder, which is composed of colorless dye phenol or other acidic substances, separated by a thin film. Under heating conditions, the film melts, and the powder mixes to react with color to show the handwriting. Since the uniformity of pulp fibers will directly affect the quality of thermal paper, in order to increase the fineness of thermal paper preparation and improve the quality of thermal paper, thermal paper is usually processed by filtering equipment to filter and collect pulp. The multi-layer filtering structure in the filtering equipment can effectively increase the uniformity of thermal paper pulp fibers, thereby ensuring the processing quality of thermal paper.

[0003] When using the current thermal paper preparation pulp fiber filtering equipment, the crushed pulp is usually mixed with water, and then a multi-layer filtering structure is used for filtering to make the pulp fibers uniform. Since the thermal paper fibers larger than the filtering structure will remain on the filtering structure, pulp with uniform fibers will be formed, which is convenient for collection and use and classification according to fiber size. Pulp fibers smaller than the pores of the filtering structure will be mixed into the water and discharged directly, making it difficult to recycle. This not only wastes the thermal paper pulp, but also pollutes the environment when the water containing fine pulp is discharged.

[0004] Combining the above problems, it is found that it is difficult to avoid the above problems at the same time when the existing thermal paper preparation pulp fiber filtering equipment is in use, and even if it can be solved, it needs to be solved through external tools, so the desired effect cannot be achieved. Therefore, a thermal paper preparation pulp fiber filtering and recycling equipment is proposed. Summary of the invention

[0005] The object of the present invention is to provide a thermal paper preparation pulp fiber filtering and recovery device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a thermal paper preparation pulp fiber filtering and recycling device, comprising a recycling mechanism, the recycling mechanism comprising a recycling tank, the upper surface of the recycling tank is fixedly connected with a sealing cover, the top of the sealing cover is fixedly connected with a feed valve, and the left side of the recycling tank is provided with a filtering mechanism;

[0007] The filtering mechanism comprises an ultrafine filtering unit, which is arranged inside the recovery tank and is used to filter out finer fibers in the pulp water body;

[0008] The filtering mechanism further comprises a filtering and squeezing unit, which is arranged at the bottom of the recovery tank and is used to squeeze and filter out water in the pulp;

[0009] A scraping mechanism is arranged on the top of the filtering and squeezing unit. The scraping mechanism is used in conjunction with the filtering mechanism and is used to assist in collecting finer fiber pulp.

[0010] Preferably, the ultrafine filtration unit comprises a rotating drum, which is arranged inside the recovery tank, and the outer surface of the rotating drum is sleeved with two limit bearings, and the outer surfaces of the outer rings of the two limit bearings are fixedly connected to the inside of the recovery tank, and the outer surface of the rotating drum is provided with a plurality of drainage holes, and the lower part of the outer surface of the rotating drum is fixedly connected with a toothed disk, and the outer surface of the recovery tank is fixedly connected with a dual-axis motor, and one output end of the dual-axis motor is fixedly connected with a pinion, and the outer surface of the pinion is meshedly connected with the outer surface of the toothed disk, and a hollow tube is arranged inside the rotating drum, and the outer surface of the hollow tube is fixedly connected with three fixing plates, and the outer surfaces of the three fixing plates are fixedly connected to the inner wall of the sealing cover, The outer surface of the hollow tube is fixedly connected to three spoiler frames, and the outer surface of each spoiler frame is provided with a plurality of spoiler grooves. A fixing ring is fixedly connected to the interior of the rotating cylinder, and the upper surface and the bottom surface of the fixing ring are fixedly connected to a first annular ultrafiltration membrane, and the outer surfaces of the two first annular ultrafiltration membranes are fixedly connected to the inner wall of the rotating cylinder. The outer surface of the recovery tank is fixedly connected to a pressure pump, and the other output end of the dual-axis motor is fixedly connected to the input end of the pressure pump. The air outlet end of the pressure pump is fixedly connected to an air supply pipe, and the other end of the air supply pipe passes through a sealing cover and extends to the interior of the sealing cover. The outer surface of the sealing cover is fixedly connected to a pressure relief valve, and the outer surface of the recovery tank is fixedly connected to a drain pipe.

[0011] Preferably, three fixing frames are fixedly connected to the outer surface of the air supply pipe, and the right side surface of each of the fixing frames is fixedly connected to the outer surface of the recovery tank.

[0012] Preferably, the filtering and extruding unit includes a discharge hood, which is located inside the rotating cylinder, and the outer surface of the discharge hood is fixedly connected to a sealing bearing, the outer surface of the outer ring of the sealing bearing is fixedly connected to the inner wall of the rotating cylinder, the bottom end of the discharge hood is fixedly connected to a drainage cylinder, the outer surface of the drainage cylinder is fixedly connected to a water outlet pipe, the inner wall of the drainage cylinder is fixedly connected to a discharge pipe, the top of the discharge pipe is fixedly connected to the bottom end of the discharge hood, a plurality of water outlet holes are opened on the outer surface of the discharge pipe, the inner wall of the discharge pipe is fixedly connected to a second annular ultrafiltration diaphragm, a servo motor is provided at the bottom of the drainage cylinder, a spiral discharge rod is provided inside the discharge pipe, the outer surface of the spiral discharge rod is in contact with the inner wall of the second annular ultrafiltration diaphragm, the output end of the servo motor passes through the discharge pipe and is fixedly connected to the bottom end of the spiral discharge rod, and the bottom end of the discharge pipe is fixedly connected to the discharge cylinder.

[0013] Preferably, two symmetrical support seats are fixedly connected to the outer surface of the recovery tank, and a support plate is fixedly connected to the bottom surfaces of the two support seats.

[0014] Preferably, two positioning frames are fixedly connected to the upper surface of the support plate, and the upper surfaces of the two positioning frames are both fixedly connected to the outer surface of the discharge cover.

[0015] Preferably, a stabilizing seat is fixedly connected to the upper surface of the support plate, and a right side surface of the stabilizing seat is fixedly connected to the outer surface of the servo motor.

[0016] Preferably, three stabilizing plates are fixedly connected to the inner wall of the discharge cover, and the inner wall of each of the stabilizing plates is fixedly connected to the outer surface of the hollow tube.

[0017] Preferably, the scraping mechanism includes a moving frame, which is slidably connected to the interior of the hollow tube, and an annular rubber scraper is arranged on the outside of the moving frame, the outer surface of the annular rubber scraper contacts the inner wall of the rotating cylinder, the inner wall of the annular rubber scraper is fixedly connected to a plurality of compression springs, and the other ends of the plurality of compression springs are fixedly connected to the outer surface of the moving frame, the interior of the hollow tube is rotatably connected to a screw, the outer surface of the screw is threadedly connected to the inner wall of the moving frame, the right side of the outer surface of the recovery tank is fixedly connected to a limiting frame, the interior of the limiting frame is rotatably connected to a first connecting shaft and a second connecting shaft respectively, the interior of the sealing cover is rotatably connected to a third connecting shaft, the top end of the screw is fixedly connected to a first bevel gear, the outer surface of the first bevel gear is meshed with one end of the third connecting shaft, the other end of the third connecting shaft is meshed with one end of the first connecting shaft, the other end of the first connecting shaft is meshed with one end of the second connecting shaft, the outer surface of the output end of the servo motor is fixedly connected to a second bevel gear, and the outer surface of the second bevel gear is meshed with the other end of the second connecting shaft.

[0018] Preferably, two auxiliary bearings are sleeved on the outer surface of the screw, the outer surfaces of the outer rings of the two auxiliary bearings are fixedly connected to the inner wall of the hollow tube, several compression springs are internally provided with telescopic rods, the telescopic ends of several telescopic rods are fixedly connected to the inner wall of the annular rubber scraper, and the other ends of several telescopic rods are fixedly connected to the outer surface of the movable frame.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention, by providing an ultrafine filtration unit, can utilize the ultrafine filtration capacity of the first annular ultrafiltration membrane, as well as the centrifugal force and pressure, to quickly filter out smaller pulp fibers in the pulp water body, effectively reduce the pulp fiber content in the pulp water body, and facilitate the recycling of smaller pulp fibers. It can also reduce the waste of pulp in the preparation process of thermal paper and reduce the pollution to the environment caused by the discharge of pulp water bodies.

[0021] The present invention provides a filtering and squeezing unit, which can remove moisture from the collected finer pulp fibers while preventing the finer pulp fibers from flowing out with the water body, making it convenient for staff to centrally collect, recycle and reuse the finer fiber thermal paper pulp without the need to dehydrate the pulp again, further improving the convenience of recycling the finer thermal paper pulp fibers.

[0022] The present invention provides a scraping mechanism, which can scrape off the finer thermal paper pulp fibers remaining on the first annular ultrafiltration membrane to a certain extent, further increasing the pulp fiber recovery effect while preventing excessive pulp fibers from remaining on the first annular ultrafiltration membrane and causing blockage, thereby ensuring the normal recovery of finer pulp fibers in the next thermal paper preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic cross-sectional structural diagram of the recovery tank of the present invention;

[0025] Figure 3 It is a schematic cross-sectional structural diagram of the rotating drum of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the limiting frame of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the servo motor of the present invention;

[0028] Figure 6 It is a schematic cross-sectional structure diagram of the discharge pipe of the present invention;

[0029] Figure 7It is a schematic diagram of the structure of the spoiler frame of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the mobile rack of the present invention.

[0031] In the figure: 1. recovery mechanism; 11. recovery tank; 12. sealing cover; 13. feed valve; 2. filtering mechanism; 21. ultrafine filtering unit; 2101. rotating cylinder; 2102. limit bearing; 2103. drain hole; 2104. toothed disc; 2105. double-axis motor; 2106. pinion; 2107. hollow tube; 2108. fixing plate; 2109. spoiler frame; 2110. spoiler groove; 2111. fixing ring; 2112. first annular ultrafiltration membrane; 2113. booster pump; 2114. air supply pipe; 2115. pressure relief valve; 2116. drain pipe; 2117. fixing frame; 22. filtering extrusion unit; 2201. discharge cover; 2202. sealing bearing; 220 3. Drain cylinder; 2204. Water outlet pipe; 2205. Discharge pipe; 2206. Water outlet hole; 2207. Second annular ultrafiltration membrane; 2208. Servo motor; 2209. Spiral discharge rod; 2210. Discharge cylinder; 2211. Support plate; 2212. Support seat; 2213. Positioning frame; 2214. Steady plate; 2215. Steady seat; 3. Scraping mechanism; 301. Moving frame; 302. Annular rubber scraper; 303. Compression spring; 304. Screw; 305. Limiting frame; 306. First connecting shaft; 307. Third connecting shaft; 308. First bevel gear; 309. Second connecting shaft; 310. Second bevel gear; 311. Auxiliary bearing; 312. Telescopic rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 7 The present invention provides a technical solution: a thermal paper preparation pulp fiber filtering and recycling device, comprising a recycling mechanism 1, the recycling mechanism 1 comprises a recycling tank 11, the upper surface of the recycling tank 11 is fixedly connected with a sealing cover 12, the top of the sealing cover 12 is fixedly connected with a feed valve 13, and the left side of the recycling tank 11 is provided with a filtering mechanism 2;

[0034] The filtering mechanism 2 includes an ultrafine filtering unit 21 . The ultrafine filtering unit 21 is disposed inside the recovery tank 11 . The ultrafine filtering unit 21 is used to filter out finer fibers in the pulp water.

[0035] As a further limitation of the filtering mechanism 2 of the present invention, the ultrafine filtering unit 21 includes a rotating cylinder 2101, the rotating cylinder 2101 is arranged inside the recovery tank 11, the outer surface of the rotating cylinder 2101 is sleeved with two limit bearings 2102, the outer surfaces of the outer rings of the two limit bearings 2102 are fixedly connected to the inside of the recovery tank 11, the outer surface of the rotating cylinder 2101 is provided with a plurality of drainage holes 2103, the lower part of the outer surface of the rotating cylinder 2101 is fixedly connected with a toothed disc 2104, the toothed disc 2104 is arranged below the recovery tank 11, the outer surface of the recovery tank 11 is fixedly connected with a dual-axis motor 2105, one output end of the dual-axis motor 2105 is fixedly connected with a pinion 2106, the outer surface of the pinion 2106 is connected to the outer surface of the toothed disc 2104 The rotating cylinder 2101 is connected by surface meshing, and a hollow tube 2107 is arranged inside. Three fixing plates 2108 are fixedly connected to the outer surface of the hollow tube 2107. The outer surfaces of the three fixing plates 2108 are fixedly connected to the inner wall of the sealing cover 12. Three spoiler frames 2109 are fixedly connected to the outer surface of the hollow tube 2107. A plurality of spoiler grooves 2110 are provided on the outer surface of each spoiler frame 2109. A fixing ring 2111 is fixedly connected inside the rotating cylinder 2101. The upper surface and the bottom surface of the fixing ring 2111 are fixedly connected to the first annular ultrafiltration diaphragm 2112. The outer surfaces of the two first annular ultrafiltration diaphragms 2112 are fixedly connected to the inner wall of the rotating cylinder 2101. The first annular ultrafiltration diaphragm 2112 is an artificial Permeable membranes are generally made of polymer materials, such as cellulose acetate, cellulose acetate esters, polyethylene, polysulfones and polyamides. Ultrafiltration membrane technology is a membrane separation technology between microfiltration and nanofiltration, with an average pore size of three to one hundred nanometers. It has the functions of purifying, separating and concentrating solutions. Its interception mechanism mainly includes the screening effect and electrostatic effect of the membrane. The filter medium is an ultrafiltration membrane. Driven by the pressure difference on both sides, only low molecular weight solutes and water can pass through the ultrafiltration membrane, thereby achieving the purpose of purification, separation and concentration. The outer surface of the recovery tank 11 is fixedly connected to a pressure pump 2113, and the other output end of the dual-axis motor 2105 is fixedly connected to the input end of the pressure pump 2113. The air outlet end of the pressure pump 2113 is fixedly connected to an air supply pipe 211 4. The other end of the air supply pipe 2114 passes through the sealing cover 12 and extends to the inside of the sealing cover 12. The outer surface of the sealing cover 12 is fixedly connected with a pressure relief valve 2115. The outer surface of the recovery tank 11 is fixedly connected with a drain pipe 2116. By setting the ultrafine filtration unit 21, the ultrafine filtration capacity of the first annular ultrafiltration membrane 2112 as well as the centrifugal force and pressure can be utilized to quickly filter out the smaller pulp fibers in the pulp water body, effectively reduce the pulp fiber content in the pulp water body, and facilitate the recycling of the smaller pulp fibers. Since the smaller pulp fibers can be added back into the thermal paper pulp as fine fibers, and the outer surface will evenly wrap the coarse fiber pulp to fix the position of the fine fibers, the pulp waste in the preparation process of thermal paper can be reduced.It can also reduce the pollution to the environment caused by the discharge of pulp water;

[0036] The outer surface of the air supply pipe 2114 is fixedly connected with three fixing frames 2117, and the right side of each fixing frame 2117 is fixedly connected with the outer surface of the recovery tank 11. The fixing frames 2117 can fix the position of the air supply pipe 2114, increase the stability of the air supply pipe 2114, and prevent the air supply pipe 2114 from excessively vibrating due to the high internal pressure and affecting the air supply work.

[0037] The specific implementation method of this embodiment is as follows: first, the dual-axis motor 2105 is connected to the external power supply and the controller, and then the pulp water to be filtered is added into the rotating drum 2101 inside the recovery tank 11 through the feed valve 13, and the feed valve 13 is closed to form a relatively closed space inside the recovery tank 11. At this time, the power provided by the dual-axis motor 2105 cooperates with the pinion 2106 to drive the toothed disk 2104 to rotate, and with the assistance of the limit bearing 2102, the rotating drum 2101 can be driven to rotate, and the first annular ultrafiltration membrane 2112 can be driven to rotate by the rotation of the rotating drum 2101 and the fixed ring 2111. At this time, the centrifugal force generated can make the pulp water gradually pass through the first annular ultrafiltration membrane 2112 and the drainage hole 2103, and be discharged into the gap between the recovery tank 11 and the rotating drum 2101, and be discharged outward through the drainage pipe 2116. When the dual-axis motor 2105 rotates, it will drive the internal rotor of the pressure pump 2113 to rotate, thereby allowing the pressure pump 2113 to rotate. The outside air is sucked in and then sent into the recovery tank 11 through the air supply pipe 2114 and the sealing cover 12, thereby increasing the pressure inside the recovery tank 11. By utilizing the pressure difference between the recovery tank 11 and the rotating drum 2101 and the outside, the efficiency of the pulp water passing through the first annular ultrafiltration membrane 2112 can be further increased. As the water in the pulp water is gradually discharged, the finer pulp fibers of the thermal paper will remain in the rotating drum 2101 to complete the filtering and separation work. Then, by utilizing the ultrafine filtering capacity of the first annular ultrafiltration membrane 2112 as well as the centrifugal force and pressure, the smaller pulp fibers in the pulp water can be quickly filtered out, effectively reducing the pulp fiber content in the pulp water, while facilitating the recycling and reuse of the smaller pulp fibers, and also reducing the waste of pulp in the preparation process of thermal paper, and reducing the pollution to the environment caused by the discharge of pulp water. Then, the excess gas pressure inside the recovery tank 11 can be discharged to the outside through the pressure relief valve 2115 to prevent the internal pressure of the recovery tank 11 from being too high.

[0038] Example 2: Please refer to Figure 1-Figure 6The present invention provides a technical solution: a pulp fiber filtering and recovery device for preparing thermal paper. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The filtering mechanism 2 also includes a filtering extrusion unit 22, which is arranged at the bottom of the recovery tank 11. The filtering extrusion unit 22 is used to squeeze and filter out the moisture in the pulp water body.

[0039] As a further limitation of the filtering mechanism 2 of the present invention, the filtering extrusion unit 22 includes a discharge cover 2201, which is located inside the rotating cylinder 2101, and the outer surface of the discharge cover 2201 is fixedly connected to a sealing bearing 2202, and the outer surface of the outer ring of the sealing bearing 2202 is fixedly connected to the inner wall of the rotating cylinder 2101, and the bottom end of the discharge cover 2201 is fixedly connected to a drainage cylinder 2203, and the outer surface of the drainage cylinder 2203 is fixedly connected to a water outlet pipe 2204, and the inner wall of the drainage cylinder 2203 is fixedly connected to a discharge pipe 2205, and the top of the discharge pipe 2205 is fixedly connected to the bottom end of the discharge cover 2201, and a plurality of water outlet holes 2206 are opened on the outer surface of the discharge pipe 2205, and the inner wall of the discharge pipe 2205 is fixedly connected to a second annular ultrafiltration membrane 2207, and the drainage cylinder 2203 is fixedly connected to the outer surface of the drainage cylinder 2203. A servo motor 2208 is provided at the bottom, and a spiral discharge rod 2209 is provided inside the discharge pipe 2205. The thread distance in the spiral discharge rod 2209 gradually decreases from top to bottom. The outer surface of the spiral discharge rod 2209 contacts the inner wall of the second annular ultrafiltration membrane 2207. The output end of the servo motor 2208 passes through the discharge pipe 2205 and is fixedly connected to the bottom end of the spiral discharge rod 2209. The bottom end of the discharge pipe 2205 is fixedly connected to a discharge barrel 2210. By providing a filtering and squeezing unit 22, the water in the collected fine pulp fibers can be removed while preventing the fine pulp fibers from flowing out with the water body, which is convenient for the staff to collect and recycle the fine fiber thermal paper pulp in a centralized manner without dehydrating the pulp again, further improving the convenience of recycling the fine thermal paper pulp fibers.

[0040] The outer surface of the recovery tank 11 is fixedly connected with two symmetrical support seats 2212, and the bottom surfaces of the two support seats 2212 are fixedly connected with a support plate 2211. The support plate 2211 cooperates with the support seat 2212 to support the position of the recovery tank 11, thereby increasing the stability of the recovery tank 11.

[0041] Two positioning frames 2213 are fixedly connected to the upper surface of the support plate 2211. The upper surfaces of the two positioning frames 2213 are fixedly connected to the outer surface of the discharge cover 2201. The positioning frames 2213 can locate the position of the discharge cover 2201 to prevent the discharge cover 2201 from rotating with the rotating cylinder 2101, thereby increasing the reliability of the discharge cover 2201 when in use.

[0042] The upper surface of the support plate 2211 is fixedly connected with a stabilizing seat 2215, and the right side of the stabilizing seat 2215 is fixedly connected with the outer surface of the servo motor 2208. The stabilizing seat 2215 can fix the position of the servo motor 2208, so that the servo motor 2208 can drive the spiral discharge rod 2209 to rotate smoothly, thereby ensuring the normal operation of the servo motor 2208;

[0043] The inner wall of the discharge cover 2201 is fixedly connected with three stabilizing plates 2214, and the inner wall of each stabilizing plate 2214 is fixedly connected to the outer surface of the hollow tube 2107. The stabilizing plates 2214 can improve the stability of the bottom end of the hollow tube 2107, so that the bottom end of the hollow tube 2107 is not prone to excessive swinging.

[0044] The specific implementation of this embodiment is as follows: first, the servo motor 2208 is connected to the external power supply and the controller. When most of the water in the rotating drum 2101 is discharged outward through the drainage hole 2103 and the drainage pipe 2116, the power provided by the servo motor 2208 is used in conjunction with the stable seat 2215 and the support plate 2211 to drive the spiral discharge rod 2209 to rotate. When the spiral discharge rod 2209 rotates, the finer fiber thermal paper pulp that falls into the discharge cover 2201 due to gravity will be rolled into the discharge pipe 2205. At this time, the gradually reduced pitch of the spiral discharge rod 2209 is used in conjunction with the second annular ultrafiltration membrane 2207 to squeeze the paper pulp again. The thermal paper pulp allows a small amount of water in the pulp to pass through the filtration of the second annular ultrafiltration membrane 2207 and the water outlet 2206, and is discharged into the gap between the drainage cylinder 2203 and the discharge pipe 2205, and is finally discharged outward through the outlet pipe 2204, and the pulp after squeezing and draining is discharged outward from the discharge cylinder 2210 as the spiral discharge rod 2209 continues to rotate, thereby removing the moisture in the collected finer pulp fibers while preventing the finer pulp fibers from flowing out with the water body, making it convenient for the staff to centrally collect, recycle and reuse the finer fiber thermal paper pulp, without the need to dehydrate the pulp again, further improving the convenience of recycling the finer thermal paper pulp fibers.

[0045] Example 3: Please refer to Figure 2-Figure 8 The present invention provides a technical solution: a pulp fiber filtering and recovery device for preparing thermal paper. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A scraping mechanism 3 is arranged on the top of the filtering and squeezing unit 22. The scraping mechanism 3 is used in conjunction with the filtering mechanism 2. The scraping mechanism 3 is used to assist in collecting finer fiber pulp.

[0046] As a further limitation of the scraping mechanism 3 of the present invention, the scraping mechanism 3 includes a moving frame 301, the moving frame 301 is slidably connected to the inside of the hollow tube 2107, an annular rubber scraper 302 is arranged on the outside of the moving frame 301, the outer surface of the annular rubber scraper 302 contacts the inner wall of the rotating cylinder 2101, the inner wall of the annular rubber scraper 302 is fixedly connected to a plurality of compression springs 303, the other ends of the plurality of compression springs 303 are fixedly connected to the outer surface of the moving frame 301, the inside of the hollow tube 2107 is rotatably connected to a screw 304, the outer surface of the screw 304 is threadedly connected to the inner wall of the moving frame 301, the right side of the outer surface of the recovery tank 11 is fixedly connected to a limiting frame 305, the inside of the limiting frame 305 is rotatably connected to a first connecting shaft 306 and a second connecting shaft 309, the inside of the sealing cover 12 is rotatably connected to a third connecting shaft 307, the top of the screw 304 is fixedly connected to a first bevel gear 308, the outer The surface is meshed and connected with one end of the third connecting shaft 307, the other end of the third connecting shaft 307 is meshed and connected with one end of the first connecting shaft 306, the other end of the first connecting shaft 306 is meshed and connected with one end of the second connecting shaft 309, the outer surface of the output end of the servo motor 2208 is fixedly connected with the second bevel gear 310, the outer surface of the second bevel gear 310 is meshed and connected with the other end of the second connecting shaft 309, the first connecting shaft 306, the second connecting shaft 309 and the third connecting shaft 307 are all connecting shafts with bevel gears installed at both ends, and the characteristics of the bevel gears can be used to achieve the needs of transmission and rotation reversal, and by setting up the scraping mechanism 3, the finer thermal paper pulp fibers remaining on the first annular ultrafiltration membrane 2112 can be scraped off to a certain extent, further increasing the pulp fiber recovery effect, while preventing excessive pulp fibers from remaining on the first annular ultrafiltration membrane 2112 to cause blockage, ensuring the normal recovery of finer pulp fibers in the next thermal paper preparation;

[0047] Two auxiliary bearings 311 are sleeved on the outer surface of the screw 304, and the outer surfaces of the outer rings of the two auxiliary bearings 311 are fixedly connected to the inner wall of the hollow tube 2107. Several compression springs 303 are internally provided with telescopic rods 312, and the telescopic ends of several telescopic rods 312 are fixedly connected to the inner wall of the annular rubber scraper 302, and the other ends of several telescopic rods 312 are fixedly connected to the outer surface of the movable frame 301. The auxiliary bearings 311 can limit the position of the screw 304 without affecting the rotation of the screw 304, thereby increasing the rotation stability of the screw 304. The telescopic rods 312 can prevent the compression spring 303 from being offset and excessively deformed, thereby increasing the use effect of the compression spring 303.

[0048] The specific implementation of this embodiment is as follows: when the servo motor 2208 rotates, the second connecting shaft 309 can be driven to rotate through the second bevel gear 310. At this time, the second connecting shaft 309 that cooperates with the limiting frame 305 can drive the first connecting shaft 306 to rotate, and then the first connecting shaft 306 can drive the third connecting shaft 307 and the first bevel gear 308 to rotate by utilizing the meshing relationship between the third connecting shaft 307 and the first bevel gear 308, thereby driving the screw 304 to rotate with the assistance of the auxiliary bearing 311. When the screw 304 rotates, it can drive the movable frame 301 to move downward under the limit of the hollow tube 2107. At this time, the movable frame 301 can be moved downward by the compression spring 303 and the telescopic rod 303. 12 drives the annular rubber scraper 302 to move downward, and utilizes the elastic force provided by the compression spring 303 and the elastic force of the annular rubber scraper 302 itself to make the outer surface of the annular rubber scraper 302 always contact with the inner wall of the first annular ultrafiltration membrane 2112, and then with the downward movement of the movable frame 301 and the annular rubber scraper 302, the finer thermal paper pulp fibers remaining on the first annular ultrafiltration membrane 2112 can be scraped off, so that most of the pulp falls into the discharge cover 2201, further increasing the pulp fiber recovery effect while preventing excessive pulp fibers from remaining on the first annular ultrafiltration membrane 2112 to cause blockage, thereby ensuring the normal recovery of finer pulp fibers in the next thermal paper preparation.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used 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.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermal paper pulp fiber filtering and recovery device, comprising a recovery mechanism (1), characterized in that: The recovery mechanism (1) comprises a recovery tank (11), the upper surface of the recovery tank (11) is fixedly connected to a sealing cover (12), the top end of the sealing cover (12) is fixedly connected to a feed valve (13), and a filtering mechanism (2) is arranged on the left side of the recovery tank (11); The filtering mechanism (2) comprises an ultrafine filtering unit (21), the ultrafine filtering unit (21) being arranged on the left side of the recovery tank (11), and the ultrafine filtering unit (21) being used to filter out relatively fine fibers in the pulp water body; The filtering mechanism (2) further comprises a filtering and squeezing unit (22), wherein the filtering and squeezing unit (22) is arranged at the bottom of the recovery tank (11), and the filtering and squeezing unit (22) is used to squeeze and filter out water in the paper pulp; A scraping mechanism (3) is provided on the top of the filtering and squeezing unit (22); the scraping mechanism (3) is used in conjunction with the filtering mechanism (2); the scraping mechanism (3) is used to assist in collecting relatively fine fiber pulp; The ultrafine filtration unit (21) comprises a rotating cylinder (2101), the rotating cylinder (2101) being arranged inside the recovery tank (11), the outer surface of the rotating cylinder (2101) being sleeved with two limit bearings (2102), the outer surfaces of the outer rings of the two limit bearings (2102) being fixedly connected to the inside of the recovery tank (11), the outer surface of the rotating cylinder (2101) being provided with a plurality of drainage holes (2103), the lower portion of the outer surface of the rotating cylinder (2101) being fixedly connected to a toothed disc (2104), and the recovery tank (11) being provided with a plurality of drainage holes (2103). A dual-axis motor (2105) is fixedly connected to the outer surface of the tank (11); a pinion gear (2106) is fixedly connected to one output end of the dual-axis motor (2105); the outer surface of the pinion gear (2106) is meshingly connected to the outer surface of the toothed disc (2104); a hollow tube (2107) is provided inside the rotating cylinder (2101); three fixing plates (2108) are fixedly connected to the outer surface of the hollow tube (2107); and the outer surfaces of the three fixing plates (2108) are fixedly connected to the inner wall of the sealing cover (12). The outer surface of the hollow tube (2107) is fixedly connected to three spoiler frames (2109), and the outer surface of each spoiler frame (2109) is provided with a plurality of spoiler grooves (2110). The interior of the rotating cylinder (2101) is fixedly connected to a fixing ring (2111), and the upper surface and the bottom surface of the fixing ring (2111) are fixedly connected to a first annular ultrafiltration membrane (2112), and the outer surfaces of the two first annular ultrafiltration membranes (2112) are fixedly connected to the inner wall of the rotating cylinder (2101). The recovery tank (1 1) is fixedly connected to the outer surface of a pressure pump (2113), the other output end of the dual-axis motor (2105) is fixedly connected to the input end of the pressure pump (2113), the air outlet end of the pressure pump (2113) is fixedly connected to an air supply pipe (2114), the other end of the air supply pipe (2114) passes through the sealing cover (12) and extends to the interior of the sealing cover (12), the outer surface of the sealing cover (12) is fixedly connected to a pressure relief valve (2115), and the outer surface of the recovery tank (11) is fixedly connected to a drain pipe (2116); The filtering and squeezing unit (22) comprises a discharge hood (2201), wherein the discharge hood (2201) is located inside the rotating cylinder (2101), the outer surface of the discharge hood (2201) is fixedly connected to a sealing bearing (2202), the outer surface of the outer ring of the sealing bearing (2202) is fixedly connected to the inner wall of the rotating cylinder (2101), the bottom end of the discharge hood (2201) is fixedly connected to a drainage cylinder (2203), the outer surface of the drainage cylinder (2203) is fixedly connected to a water outlet pipe (2204), the inner wall of the drainage cylinder (2203) is fixedly connected to a discharge pipe (2205), and the top end of the discharge pipe (2205) is fixedly connected to the bottom end of the discharge hood (2201), The outer surface of the discharge pipe (2205) is provided with a plurality of water outlet holes (2206); the inner wall of the discharge pipe (2205) is fixedly connected to a second annular ultrafiltration membrane (2207); a servo motor (2208) is provided at the bottom of the drainage cylinder (2203); a spiral discharge rod (2209) is provided inside the discharge pipe (2205); the outer surface of the spiral discharge rod (2209) is in contact with the inner wall of the second annular ultrafiltration membrane (2207); the output end of the servo motor (2208) passes through the discharge pipe (2205) and is fixedly connected to the bottom end of the spiral discharge rod (2209); and the bottom end of the discharge pipe (2205) is fixedly connected to a discharge cylinder (2210); The scraping mechanism (3) comprises a movable frame (301), the movable frame (301) being slidably connected to the inside of the hollow tube (2107), an annular rubber scraper (302) being arranged outside the movable frame (301), the outer surface of the annular rubber scraper (302) being in contact with the inner wall of the rotating cylinder (2101), a plurality of compression springs (303) being fixedly connected to the inner wall of the annular rubber scraper (302), the other ends of the plurality of compression springs (303) being fixedly connected to the outer surface of the movable frame (301), a screw rod (304) being rotatably connected to the inside of the hollow tube (2107), the outer surface of the screw rod (304) being threadedly connected to the inner wall of the movable frame (301), and a limiting frame (305) being fixedly connected to the right side of the outer surface of the recovery tank (11), the limiting frame (305) being fixedly connected to the inner wall of the recovery tank (11). The interior of the positioning frame (305) is rotatably connected to a first connecting shaft (306) and a second connecting shaft (309), the interior of the sealing cover (12) is rotatably connected to a third connecting shaft (307), the top end of the screw rod (304) is fixedly connected to a first bevel gear (308), the outer surface of the first bevel gear (308) is meshingly connected to one end of the third connecting shaft (307), the other end of the third connecting shaft (307) is meshingly connected to one end of the first connecting shaft (306), the other end of the first connecting shaft (306) is meshingly connected to one end of the second connecting shaft (309), the outer surface of the output end of the servo motor (2208) is fixedly connected to a second bevel gear (310), and the outer surface of the second bevel gear (310) is meshingly connected to the other end of the second connecting shaft (309).

2. The thermal paper pulp fiber filtering and recovery device according to claim 1, characterized in that: Three fixing frames (2117) are fixedly connected to the outer surface of the air supply pipe (2114), and the right side surface of each fixing frame (2117) is fixedly connected to the outer surface of the recovery tank (11).

3. The thermal paper preparation pulp fiber filtering and recovery device according to claim 1, characterized in that: Two symmetrical support seats (2212) are fixedly connected to the outer surface of the recovery tank (11), and a support plate (2211) is fixedly connected to the bottom surfaces of the two support seats (2212).

4. The thermal paper pulp fiber filtering and recovery device according to claim 3, characterized in that: Two positioning frames (2213) are fixedly connected to the upper surface of the support plate (2211), and the upper surfaces of the two positioning frames (2213) are fixedly connected to the outer surface of the discharge cover (2201).

5. The thermal paper pulp fiber filtering and recovery device according to claim 3, characterized in that: The upper surface of the support plate (2211) is fixedly connected to a stabilizing seat (2215), and the right side surface of the stabilizing seat (2215) is fixedly connected to the outer surface of the servo motor (2208).

6. The thermal paper pulp fiber filtering and recovery device according to claim 1, characterized in that: The inner wall of the discharge cover (2201) is fixedly connected to three stabilizing plates (2214), and the inner wall of each stabilizing plate (2214) is fixedly connected to the outer surface of the hollow tube (2107).

7. The thermal paper preparation pulp fiber filtering and recovery device according to claim 1, characterized in that: Two auxiliary bearings (311) are sleeved on the outer surface of the screw rod (304); the outer surfaces of the outer rings of the two auxiliary bearings (311) are fixedly connected to the inner wall of the hollow tube (2107); a plurality of compression springs (303) are provided with telescopic rods (312) inside; the telescopic ends of the plurality of telescopic rods (312) are fixedly connected to the inner wall of the annular rubber scraper (302); and the other ends of the plurality of telescopic rods (312) are fixedly connected to the outer surface of the movable frame (301).

Images