Pneumatic feed double-disc pulping machine

Abstract

The pneumatic feed double-disc pulping machine comprises a machine body, a machine shell, a machine cover, rotary discs and fixed discs, the machine shell is connected with the machine body and the machine cover, a second feeding port and a discharging port are formed in the machine shell, the fixed discs comprise the first fixed disc and the second fixed disc, spring reset devices comprise the first spring reset device and the second spring reset device, the first fixed disc is connected with the first spring reset device, and the second spring reset device is connected with the second spring reset device. The second fixed disc is connected with the second spring reset device, the first spring reset device is connected with the machine cover, the second spring reset device is connected with the machine shell, the machine shell and the machine cover form a closed pulping chamber, the rotary disc is connected with the main shaft, the machine cover is provided with a first air inlet and a first water outlet, the machine shell is provided with a second air inlet and a second water outlet, and the first fixed disc and the machine cover form a first air chamber. According to the self-balancing type paper pulp grinding machine, the pressure intensity and the paper pulp pressure are self-balanced, it is guaranteed that gaps between the grinding pieces on the two sides are consistent, the acting force is the same, the beating degree of produced paper pulp is consistent, the paper pulp quality is good, the service life of the grinding pieces is prolonged, and the use cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pulping and papermaking equipment, and in particular to a pneumatic feed double-disc refiner. Background Art

[0002] Most of the double-disc refiners in the prior art use a worm gear reducer for advancing and retracting the blades, and the motor is controlled by the set power of the main motor to drive the parallel shaft reducer and the worm gear reducer to complete the advancing and retracting operation. The advancing and retracting of the blades in this structure is a one-way advancing and retracting blade, that is, when advancing the blades, a group of grinding discs is pushed to advance the blades, and the thrust is transmitted to the two groups of grinding discs on the movable disc of the refiner through the pulp, driving the movable disc to overcome the friction at the connection with the main shaft and move toward the last group of grinding discs, which causes inconsistent force on the fibers in the grinding zones on both sides, and then inconsistent refining effects, resulting in inconsistent beating degrees of pulp produced in the grinding zones on both sides, and the quality of the produced paper is not high and the stability is poor, and even defective products appear, resulting in high production costs and poor economic benefits. This problem is particularly obvious for the production of special paper pulp. Summary of the invention

[0003] The present invention is to overcome the shortcomings of the above-mentioned prior art and provide a pneumatic feed double-disc refiner. The present invention adopts a pneumatic feed structure, which is simple in structure and easy to operate. The advance and retreat of the blade are realized by gas pressure. The air chambers on both sides are connected and the pressure is equal. The pressure of the present invention is self-balanced with the pulp pressure to ensure that the gap between the grinding discs on both sides is consistent, the acting force is the same, the beating degree of the output pulp is consistent, the output pulp quality is good and stable, the service life of the equipment accessories grinding disc is extended, and the customer's use cost is reduced.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A pneumatic feed double-disc pulping machine, comprising a machine body, a machine casing, a machine cover, a bearing chamber, a main shaft transmission mechanism, a spring reset device, a rotating disk, a fixed disk, and a water collecting device. The machine casing is connected to the upper part of one side of the machine body, the bearing chamber is connected to the upper part of the other side of the machine body, the machine casing and the machine cover are sealed by a flange, the machine casing is provided with a second feed port and a discharge port, the fixed disk comprises a fixed disk 1 and a fixed disk 2, the spring reset device comprises a spring reset device 1 and a spring reset device 2, the fixed disk 1 is connected to the spring reset device 1, the fixed disk 2 is connected to the spring reset device 2, the spring reset device The first device is connected with the machine cover, the second spring reset device is connected with the casing, the first fixed plate and the inner side surface are provided with a first grinding disc, the second fixed plate and the inner side surface are provided with a fourth grinding disc, the two sides of the rotating disk are provided with a second grinding disc and a third grinding disc respectively, the casing and the machine cover are sealed and connected to form a closed refining chamber, the main shaft transmission mechanism includes a main shaft, the main shaft is supported on the bearing chamber through a bearing, the rotating disk is connected with one end of the main shaft through a key fit, the rotating disk and the end of the main shaft are located in a closed cavity, the other end of the main shaft is connected with the motor through a coupling to provide power for the equipment, and the annular space inside the casing forms a refining chamber;

[0006] The upper part of the cover is provided with an air inlet 1, the upper part of the casing is provided with an air inlet 2, the air inlet 1 and the air inlet 2 are respectively connected to the air source control box through pipelines, the lower part of the cover is provided with a drain port 1, the lower part of the casing is provided with a drain port 2, the drain port 1 and the drain port 2 are connected to the water collection device through pipelines;

[0007] An air chamber 1 is formed between the first fixed plate and the cover, and an air chamber 2 is formed between the second fixed plate and the casing. The first air chamber and the second air chamber are respectively connected to a high-pressure air source. The first fixed plate and the second fixed plate can move axially under the push of air pressure.

[0008] The cover is provided with a first mounting hole, the first spring reset device is connected to the cover through the first mounting hole, the casing is provided with a second mounting hole, the second spring reset device is connected to the casing through the second mounting hole;

[0009] The spring reset device 1 and the spring reset device 2 both include a spring sleeve, a spring, a spring pressure plate, a sealing rubber, a pipe cap plug, a copper sleeve, a spring guide pin, and a bolt. The spring sleeve is connected to the mounting hole 1 or the mounting hole 2. A spring guide pin is arranged inside the spring sleeve, and a spring is sleeved outside the spring guide pin. A bolt passes through the axial hole of the spring guide pin. A spring pressure plate is arranged at one end of the spring, and the spring pressure plate cooperates with the inner side of the bolt head. The other end of the spring cooperates with one end of the copper sleeve, and the copper sleeve is connected to the casing. One end of the spring sleeve is connected to the pipe cap plug through a threaded fit, and a sealing rubber is arranged between the end of the spring sleeve and the inner end face of the pipe cap plug.

[0010] An annular sealing ring is provided at the flange connection, a sealing groove is provided on the machine cover, and the sealing ring is installed in the sealing groove;

[0011] A sealing structure is provided at a position close to the casing and the inner side of the cover, and the sealing structure includes pneumatic tire 1 and pneumatic tire 2. Pneumatic tire 1 cooperates with the cover, and pneumatic tire 2 cooperates with the casing. The outer end face of pneumatic tire 1 on the side close to the radial outer position cooperates with the inner end of the cover and the corresponding pneumatic tire outer pressure ring and screws are used to fix the two and seal the air chamber 1. In addition, the outer end face of pneumatic tire 1 on the side close to the radial inner position cooperates with the inner end face of fixed plate 1, and the corresponding pneumatic tire inner pressure ring and screws are used to fix the two and seal the air chamber 1. The pneumatic tire inner pressure ring is bolted to the fixed plate;

[0012] The outer end face of the second pneumatic tire on the side close to the radial outer position cooperates with the inner end of the casing, and the two are fixed and the air chamber two is sealed by the corresponding pneumatic tire outer pressure ring and screws. In addition, the outer end face of the second pneumatic tire on the side close to the radial inner position cooperates with the inner end face of the second fixed plate, and the two are fixed and the air chamber two is sealed by the corresponding pneumatic tire inner pressure ring and screws. The pneumatic tire inner pressure ring is connected with the fixed plate bolts.

[0013] The inner holes of the first and second fixed plates are connected to a movable sealing ring respectively, and the contact surfaces of the movable sealing ring and the first and second fixed plates are provided with sealing rings 2 respectively, and the contact positions of the movable sealing ring and the cover or the housing are respectively provided with two V-shaped sealing rings with opposite openings, and the V-shaped sealing rings are respectively installed in the annular holes of the cover or the housing;

[0014] The pneumatic tire 1 works together with the sealing ring 2, V-shaped sealing ring and sealing gasket on one side of the machine cover to achieve the sealing of the air chamber 1; the pneumatic tire 2 works together with the sealing ring 2, V-shaped sealing ring, sealing ring 1 and sealing gasket on one side of the machine casing to achieve the sealing of the air chamber 2.

[0015] Bearing seats are provided at both ends of the bearing chamber, bearings are installed in the bearing seats, the main shaft of the main shaft transmission mechanism is supported on the bearing chamber through bearings, lubricating oil is filled in the bearing chamber, and the support and lubrication of the main shaft transmission mechanism are achieved through the bearing chamber.

[0016] The turntable is connected to the main shaft through a flat key or a spline. When the turntable and the main shaft are splined, the center of the turntable is connected to the spline sleeve, the length of the spline shaft is greater than the length of the spline sleeve, and the turntable can slide axially on the spline shaft;

[0017] When the turntable and the main shaft are matched with a flat key, a flat key sleeve is welded at the center of the turntable, the turntable is fixed on the main shaft without axial sliding, and the turntable is positioned between the two fixed plates.

[0018] The machine cover is provided with a feed inlet 1.

[0019] The casing is provided with an observation port, through which the wear of the grinding disc can be observed.

[0020] The water collecting device includes a water collecting tank, two steel wire hoses are connected to the water collecting tank through a three-way pipe joint, the installation height of the water collecting tank is lower than the height of the equipment drain port, and the water collecting tank is used to collect water in the equipment air chamber.

[0021] The machine body, machine casing and machine cover are respectively welded structures; the machine body, the machine casing and the bearing chamber are connected by bolts; and the machine cover is connected to the machine casing by a hinge shaft.

[0022] The beneficial effects of the present invention are:

[0023] 1. The pneumatic feed double-disc pulping machine of the present invention, the spring reset device includes a spring reset device 1 and a spring reset device 2, the fixed plate 1 is connected to the spring reset device 1, the fixed plate 2 is connected to the spring reset device 2, the spring reset device 1 is connected to the machine cover, the spring reset device 2 is connected to the casing, the casing and the machine cover are sealed and connected to form a closed pulping chamber, the turntable is connected to one end of the main shaft through a key, the turntable and the main shaft end are located in the closed cavity, and the other end of the main shaft is connected to the motor through a coupling to provide power for the equipment; since the present invention adopts a pneumatic feed structure, the pneumatic feed device is simpler than the feed device composed of a reduction motor and a worm gear, does not require mechanical transmission devices such as a worm gear reducer, is easy to operate, the advance and retreat of the knife is realized by gas pressure, the air chambers on both sides are connected and the pressure is equal, the pressure of the present invention is self-balanced with the pulp pressure to ensure that the gap between the grinding plates on both sides is consistent, the force is the same, the beating degree of the output pulp is consistent, the output pulp is of good and stable quality, the service life of the equipment accessory grinding plate is extended, and the customer's use cost is reduced.

[0024] Air chamber one is formed between fixed plate one and the machine cover, air chamber two is formed between fixed plate two and the machine casing, air chamber one and air chamber two are connected to high-pressure air sources respectively, air chamber one is communicated with air chamber two, the pressures are equal, the pressure is self-balanced with the pulp pressure in the refining area, thereby ensuring that the gap between the refining plates in the refining areas on both sides is consistent, the quality of the output pulp is consistent, the output pulp quality is good and more stable, avoiding the problem of inconsistent refining quality caused by single-sided feeding of traditional refiners.

[0025] The fixed plate 1 and the fixed plate 2 can move axially under the push of air pressure. The pressure of the air chamber 1 and the air chamber 2 is adjusted by the pressure regulating device of the air control box to push the fixed plate toward the moving plate side. When the motor runs at a power lower than the set power, the pressure regulating device increases the pressure in the air chamber 1 and the air chamber 2 to push the fixed plate toward the rotating plate to achieve the purpose of feeding the knife. When the motor runs at a power higher than the set power, the pressure regulating device reduces the pressure in the air chamber 1 or the air chamber 2, and pulls the fixed plate to reset through the spring reset device, away from the rotating plate, to achieve the purpose of reliable knife retraction.

[0026] 2. The spring reset device 1 and the spring reset device 2 both include a spring sleeve, a spring, a spring pressure plate, a sealing rubber, a pipe cap plug, a copper sleeve, a spring guide pin, and a bolt. The spring reset device provides a resetting pulling force for the fixed plate. During the initial installation, the bolt presses the spring pressure plate. At this time, the spring is in a contracted state, giving the spring pressure plate an outward force to tighten the fixed plate 1 and the fixed plate 2, so that they can easily contact the machine body or the machine cover. When the air pressure in the air chamber is increased, the air pressure in the air chamber becomes larger, and the fixed plate 1 and the fixed plate 2 move toward the turntable, which can reliably complete the feeding. At the same time, the bolts connected to the fixed plate 1 and the fixed plate 2 will press down the spring pressure plate to continue to compress the spring; when the air pressure in the air chamber is reduced, the fixed plate 1 and the fixed plate 2 will move in the direction away from the turntable due to the action of the pulp pressure in the good pulp chamber and the pulling force of the spring reset, so that the retraction can be reliably completed.

[0027] 3. An annular sealing ring 1 is provided at the flange connection, and a sealing structure is provided at a position close to the casing and the inner side of the cover, the sealing structure comprising an air tire 1 and an air tire 2, the air tire 1 cooperates with the cover, the air tire 2 cooperates with the casing, the air tire 1 cooperates with the cover and fixes the two and seals the air chamber 1 through corresponding air tire outer pressure rings and screws, the air tire 1 cooperates with a fixed plate 1 and fixes the two and reliably seals the air chamber 1 through corresponding air tire inner pressure rings and screws; the air tire 2 cooperates with the casing and fixes the air chamber 2 through corresponding air tire outer pressure rings and screws, fixes the two and seals the air chamber 2 through air tire inner pressure rings and screws, the air tire 1 and the sealing ring 2, V-shaped sealing ring and sealing gasket on one side of the cover work together to seal the air chamber 1; the air tire 2 and the sealing ring 2, V-shaped sealing ring and sealing gasket on one side of the casing work together to reliably seal the air chamber 2.

[0028] 4. Bearing seats are provided at both ends of the bearing chamber, and the bearings are installed in the bearing seats. The main shaft of the main shaft transmission mechanism is supported on the bearing chamber through the bearings. Lubricating oil is filled in the bearing chamber, and the main shaft transmission mechanism is reliably and stably supported and lubricated through the bearing chamber. The bearing chamber bears centrifugal force and axial force at the same time to ensure the normal operation of the equipment. Good lubrication and sealing of the bearing chamber ensure the high precision and long-term stable operation of the main shaft.

[0029] 5. The bearing chamber adopts an integrated structure, which is easy to install and debug. The thin oil lubrication of the bearing facilitates equipment maintenance. The bearing chamber does not need to frequently replace the lubricating oil, which can ensure that the lubrication and heat dissipation requirements of the bearing are met during high-speed operation, extend the bearing life, and improve the stability of equipment operation.

[0030] 6. The turntable is welded by plates and pipes, with a simple and firm structure and low cost. The turntable is connected to the second and third grinding plates by bolts, which makes replacement and maintenance convenient.

[0031] 7. The turntable is connected to the main shaft through a flat key or a spline, the center of the turntable is connected to the spline sleeve, the length of the spline shaft is greater than the length of the spline sleeve, and the turntable can slide axially on the flat key or spline shaft. The accuracy required for the centering of the turntable in the middle of the fixed plate is reduced, and it can automatically center under the push of the slurry during the working process, so as to achieve the purpose of consistent beating effect in the two grinding areas and improve the beating quality. The turntable and the main shaft adopt a flat key matching structure, which is simple in structure and can meet the beating quality requirements.

[0032] 8. The housing is provided with an observation port, through which the wear of the grinding disc can be easily observed to determine whether the grinding disc needs to be replaced. The observation port adopts a detachable connection structure, which can be easily disassembled after shutdown, making it easy to maintain the equipment.

[0033] 9. The water collection device includes a water collection tank. Two steel hoses are connected to the water collection tank through a three-way pipe joint. The installation height of the water collection tank is lower than the height of the equipment drain port. The gas and water in the air chamber of the equipment will flow to the water collection tank and be collected in the water collection tank. The water collection device can prevent the gas in the air chamber from forming water accumulation and corroding the air chamber, thereby extending the service life of the equipment. It has a simple structure and is easy to operate. The installation position of the water collection tank is lower than the drain port. The gas enters the air chamber and exits from the drain port and returns to the gas control box after passing through the water collection tank. Through the action of gravity, the accumulated water in the air chamber will flow into the water collection tank along the pipeline. Regularly opening and closing the ball valve of the water collection tank to discharge the accumulated water can ensure that the gas in the air chamber is relatively dry, avoid water accumulation and corrode the air chamber, and extend the service life of the equipment.

[0034] 10. The machine body, casing and cover are respectively welded structures; the machine body, casing and bearing chamber are connected by bolts; the cover and casing are connected by a hinge shaft to ensure reliable connection and easy disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0036] Figure 1 It is a front view of an embodiment of the present invention;

[0037] Figure 2 for Figure 1 Left view of

[0038] Figure 3 for Figure 2 AA section view;

[0039] Figure 4 It is a schematic diagram of the spring return device and its connection relationship structure of the present invention;

[0040] Figure 5 This is a structural schematic diagram of the first limit point of tool withdrawal of the present invention;

[0041] Figure 6This is a structural schematic diagram of the second limit point of tool retraction of the present invention;

[0042] Figure 7 This is a schematic diagram of the structure in which the turntable and the main shaft are connected via splines.

[0043] In the figure, the machine body 1, the machine shell 2, the machine cover 3, the main shaft transmission mechanism 4, the movable sealing ring 5, the spring reset device 16, the rotating plate 7, the fixed plate 8, the pneumatic inner pressure ring 9, the pneumatic outer pressure ring 10, the bearing chamber 11, the grinding disc 12, the grinding disc 2 13, the grinding disc 3 14, the grinding disc 4 15, the water collecting device 16, the pneumatic tire 18, the sealing ring 19, the bearing 20, the air inlet 1 21, the drain outlet 1 22, the air chamber 1 23, the hinge shaft 24, the air chamber 2 25, the sealing Ring 26, V-ring 27, pneumatic tire 28, spring reset device 29, air inlet 2 31, drain outlet 2 32, main shaft 40, feed inlet 1 41, discharge outlet 42, feed inlet 2 43, refining chamber 44, spring sleeve 61, spring 62, spring pressure plate 63, sealing gasket 64, pipe cap plug 65, copper sleeve 66, spring guide pin 67, bolt 68, spline sleeve 71, spline shaft 72, fixed plate 8, fixed plate 1 81, fixed plate 2 82. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0045] like Figure 1-7As shown, a pneumatic feed double-disc pulping machine includes a body 1, a casing 2, a cover 3, a bearing chamber 11, a main shaft transmission mechanism 4, a spring reset device 6, a rotating disk 7, a fixed disk 8, and a water collecting device 16. The casing 2 is connected to the upper part of one side of the body 1, and the bearing chamber 11 is connected to the upper part of the other side of the body 1. The casing 2 and the cover 3 are sealed by a flange. The casing 2 is provided with a feed port 2 43 and a discharge port 42. The fixed disk includes a fixed disk 1 81 and a fixed disk 2 82. The spring reset device includes a spring reset device 1 6 and a spring reset device 29. The fixed disk 1 81 is connected to the spring reset device 1 6, and the fixed disk 2 82 is connected to the spring reset device 2 2 9 is connected, the spring reset device 1 is connected to the cover 3, the spring reset device 29 is connected to the casing 2, the fixed disk 1 81 and the inner side are provided with a grinding sheet 12, the fixed disk 2 82 inner side grinding sheet 4 15, the rotating disk 7 is provided with grinding sheets 2 13 and 3 14 on both sides, the casing 2 and the cover 3 are sealed and connected to form a closed refining chamber 44, the main shaft transmission mechanism 4 includes a main shaft 40, the main shaft 40 is supported on the bearing chamber 11 through a bearing, the rotating disk 7 is connected to one end of the main shaft 40 through a key fit, the rotating disk 7 and the ends of the main shaft 40 are located in the closed cavity, and the other end of the main shaft 40 is connected to the motor through a coupling to provide power for the equipment. The refining chamber 44 refers to the annular space inside the casing, including the gap between the rotating disk 7 and the fixed disk 8.

[0046] An air chamber 23 is formed between the fixed plate 1 81 and the cover 3, and an air chamber 25 is formed between the fixed plate 2 82 and the casing 2. The fixed plates 1 81 and 82 can move axially under the push of air pressure but do not rotate. The movable sealing ring is made of 17-4PH material, which is more wear-resistant and ensures the sealing of the air chamber.

[0047] Air chamber 1 23 and air chamber 2 25 are respectively connected to a high-pressure air source. The high-pressure air source can be an air control box. The high-pressure air source enters air chamber 1 23 and air chamber 2 25. The pressure of air chamber 1 23 and air chamber 2 25 is adjusted by the pressure regulating device of the air control box to push the fixed plate toward the moving plate. Generally, the pulping machine adopts constant power beating, and the motor maintains the set power operation. When the motor runs below the set power, the pressure regulating device increases the pressure in air chamber 1 23 or air chamber 2 25 to achieve the purpose of advancing the knife. When the motor runs above the set power, the pressure regulating device reduces the pressure in air chamber 1 23 or air chamber 2 25, and the purpose of retracting the knife is achieved through the spring reset device.

[0048] An air inlet 1 21 is provided at the top of the machine cover 3, and an air inlet 2 31 is provided at the top of the machine casing 2. The air inlet 1 21 and the air inlet 2 31 are respectively connected to the air source control box through pipes. A drain outlet 1 22 is provided at the bottom of the machine cover 3, and a drain outlet 2 32 is provided at the bottom of the machine casing 2. The drain outlet 1 22 and the drain outlet 2 32 are connected to the water collection device 16 through pipes.

[0049] The machine cover 3 is provided with a mounting hole 1, and the spring reset device 1 6 is connected to the machine cover 3 through the mounting hole 1. The machine housing 2 is provided with a mounting hole 2, and the spring reset device 2 29 is connected to the machine housing 2 through the mounting hole 2.

[0050] A sealing ring 19 is provided between the fixed plate 81 and the machine cover 3 , and a sealing groove is provided on the machine cover. The sealing ring 19 is installed in the sealing groove, and the sealing between the fixed plate 81 and the machine cover 3 is achieved through the sealing ring 19 .

[0051] The spring reset device 6 includes a spring sleeve 61, a spring 62 (under compression force in the working state), a spring pressure plate 63, a sealing gasket 64, a pipe cap plug 65, a copper sleeve 66, a spring guide pin 67, and a bolt 68. The pipe cap plug 65 can be a hexagonal pipe cap plug, and the bolt 68 can be a hexagonal head bolt; a spring guide pin 67 is arranged inside the spring sleeve 61, and a spring 62 is sleeved on the outside of the spring guide pin 67. The bolt 68 passes through the axial hole of the spring guide pin 67. A spring pressure plate 63 is arranged at one end of the spring 62, and the spring pressure plate 63 cooperates with the inner side of the head of the bolt 68. The other end of the spring 62 cooperates with one end of the copper sleeve 66, and the copper sleeve 66 is connected to the housing 2. One end of the spring sleeve 61 is connected to the pipe cap plug 65 through threaded cooperation, and a sealing gasket 64 is arranged between the end of the spring sleeve 61 and the inner end surface of the pipe cap plug 65;

[0052] A sealing structure is provided near the inner side of the casing 2 and the cover 3 .

[0053] The sealing structure is a pneumatic tire, including pneumatic tire 18 and pneumatic tire 28. Pneumatic tire 18 cooperates with the machine cover 3, and pneumatic tire 28 cooperates with the machine casing 2. The outer end face of pneumatic tire 18 on the side close to the radial outer position cooperates with the inner end of the machine cover 3 and the corresponding pneumatic tire outer pressure ring 10 and screws are used to fix the two and seal the air chamber 23. In addition, the outer end face of pneumatic tire 18 on the side close to the radial inner position cooperates with the inner end face of fixed plate 81 and the corresponding pneumatic tire inner pressure ring 9 and screws are used to fix the two and seal the air chamber 23. The pneumatic tire inner pressure ring 9 is connected to the fixed plate bolts to compress the pneumatic tire to prevent air leakage.

[0054] Similarly, the pneumatic tire 28 that cooperates with the casing 2 cooperates with the inner end of the casing 2 at the outer end face on the side close to the radial outer position, and the two are fixed and the air chamber 25 is sealed by the corresponding pneumatic tire outer pressure ring 10 and screws. In addition, the pneumatic tire 28 cooperates with the inner end face of the fixed plate 2 82 at the outer end face on the side close to the radial inner position, and the two are fixed and the air chamber 25 is sealed by the corresponding pneumatic tire inner pressure ring 9 and screws. The pneumatic tire inner pressure ring 9 is connected to the fixed plate bolts to compress the pneumatic tire to prevent air leakage.

[0055] The pneumatic tire has a telescopic characteristic, which can meet the axial movement requirements of the fixed plate, and avoid the problem of jamming that may be caused by the sealing ring structure used inside and outside the fixed plate 1 81 and the fixed plate 2 82.

[0056] The spring return device provides a return tension for the air tire. During the initial installation, the bolt 68 presses the spring pressure plate 63. At this time, the spring 62 is in a contracted state, giving the spring pressure plate 63 an outward force, tightening the fixed plate 1 81 and the fixed plate 2 82 to facilitate contact with the machine body 1 or the machine cover 3. When the air pressure in the air chamber is increased, the air pressure in the air chamber becomes larger, and the fixed plate 1 81 and the fixed plate 2 82 move toward the turntable 7 to complete the feed. At the same time, the bolt 68 connected to the fixed plate 1 81 and the fixed plate 2 82 will press down the spring pressure plate 63 to continue to compress the spring; when the air pressure in the air chamber is reduced, the fixed plate 1 81 and the fixed plate 2 82 will move away from the turntable 7 due to the pulp pressure in the good pulp chamber and the return tension of the spring 62 to complete the retraction.

[0057] The inner holes of the fixed plate 1 81 and the fixed plate 2 82 are connected by bolts with a movable sealing ring 5, and the contact surfaces of the movable sealing ring 5 with the fixed plate 1 81 and the fixed plate 2 82 are provided with sealing rings 26, respectively. The contact positions of the movable sealing ring 5 with the machine cover 3 or the machine housing 2 are provided with two V-shaped sealing rings 27 with opposite openings, and the V-shaped sealing rings 27 are respectively installed in the annular holes of the machine cover 3 or the machine housing 2, and the sealing rings 26 and the two opposite V-shaped sealing rings 27 play a role of bidirectional sealing. Specifically, the pneumatic tire 18 and the sealing rings 26, the V-shaped sealing rings 27, and the sealing gasket 64 on one side of the machine cover 3 work together to achieve the sealing of the air chamber 1 23; the pneumatic tire 28 and the sealing rings 26, the V-shaped sealing rings 27, and the sealing gasket 64 on one side of the machine housing 2 work together to achieve the sealing of the air chamber 2 25.

[0058] The housing is provided with an observation port 45, through which the wear of the grinding disc can be conveniently observed to determine whether the grinding disc needs to be replaced. The observation port can adopt a detachable connection structure so as to achieve rapid disassembly after shutdown.

[0059] The machine cover 3 is provided with a feed inlet 41. The feed inlet 41 is arranged at one side of the outer end of the machine cover 3.

[0060] Bearing seats are provided at both ends of the bearing chamber 11, and bearings 20 are installed in the bearing seats. The main shaft of the main shaft transmission mechanism 4 is supported on the bearing chamber 11 through the bearings 20. Lubricating oil is filled in the bearing chamber 11, and the main shaft transmission mechanism 4 is supported and lubricated through the bearing chamber 11. The bottom can be connected to the body 1 by bolts. The bearing chamber bears centrifugal force and axial force at the same time to ensure the normal operation of the equipment. Good lubrication and sealing of the bearing chamber ensure the high precision and long-term stable operation of the main shaft.

[0061] The bearing chamber adopts an integrated structure, which is easy to install and debug. The thin oil lubrication of the bearing facilitates equipment maintenance. The bearing chamber does not need to frequently replace the lubricating oil, which can ensure that the lubrication and heat dissipation requirements of the bearing are met during high-speed operation, extend the bearing life, and improve the stability of equipment operation.

[0062] The turntable 7 is welded by plate and pipe, and has a simple and firm structure and low cost. The turntable 7 is connected with the grinding disc 2 13 and the grinding disc 3 14 by bolts, and is convenient for replacement and maintenance.

[0063] The turntable 7 is connected to the main shaft through a flat key or a spline.

[0064] Combination Figure 7 When the turntable 7 and the main shaft are splined, the center of the turntable 7 is connected to the spline sleeve 71, and the length of the spline shaft 72 is greater than the length of the spline sleeve 71, and the turntable can slide axially on the spline shaft; the accuracy required for the centering of the turntable in the middle of the fixed plate is reduced, and it can automatically center under the push of the slurry during operation, further improving the beating quality and achieving the purpose of consistent beating effect in the two grinding areas.

[0065] When the turntable 7 and the main shaft are matched with a flat key, a flat key sleeve is welded at the center of the turntable 7, the turntable 7 is fixed on the main shaft 40 and cannot slide axially, and the turntable is accurately positioned between the two fixed plates.

[0066] The fixed plate 8 is a forging, and is connected to the grinding plate 12 and the grinding plate 4 15 by bolts, and has a simple structure, is easy to process, and is convenient for replacement and maintenance.

[0067] The machine body 1 adopts a fully welded structure, which is both strong and cost-saving. The machine body 1 is connected to the housing 2 and the bearing chamber 11 by bolts, which is convenient for installation and disassembly.

[0068] The casing 2 is welded by plates and pipes, and has a simple and firm structure.

[0069] The machine cover 3 is welded by plates and pipes, has a simple and firm structure, and is connected to the machine casing 2 by a hinge shaft and bolts, which is convenient for installation and maintenance.

[0070] The water collecting device 16 includes a water collecting tank, and two steel wire hoses are connected to the water collecting tank through a three-way pipe joint. The installation height of the water collecting tank is lower than the height of the equipment drain outlet. The gas and water in the equipment air chamber will flow to the water collecting tank and be collected in the water collecting tank. This can prevent the water in the gas from gathering in the air chamber to form accumulated water and corrode the air chamber.

[0071] The working principle of the double-disc refiner for papermaking of the present invention is as follows:

[0072] The slurry is ground, sheared and squeezed by the relative rotation of the rotating disk 7 and the fixed disk 8, thereby achieving the beating treatment of the slurry, as described in detail as follows:

[0073] Slurry transportation: The slurry formed after the papermaking raw materials are initially treated enters the double-disc refiner from the feed port 1 41 and the feed port 2 43. The slurry entering the refiner will be evenly distributed to the area between the two grinding discs. The motor drives the turntable 7 to rotate at high speed through the transmission device, and the speed usually ranges from several hundred to thousands of revolutions per minute. The fixed disc 8 remains stationary, and the turntable 7 and the fixed disc 8 move relative to each other. Refining process: When the slurry enters between the turntable 7 and the fixed disc 8, it will be affected by the teeth and grooves on the surface of the grinding disc. As the turntable 7 rotates, the teeth on the grinding disc will grab, tear and rub the fibers in the slurry. At the same time, due to the small gap between the turntable 7 and the fixed disc 8, the slurry will also be subjected to extrusion and shearing forces. Under the combined action of these forces, the fibers in the slurry are cut and fibrillated, becoming softer and more delicate, and the length and shape of the fibers are also adjusted, thereby improving the bonding and interweaving ability of the fibers. Pulp discharge: The pulp after refining is discharged from the edge of the grinding disc under the action of centrifugal force and the teeth of the grinding disc, and enters the subsequent papermaking process.

[0074] The pneumatic feed double-disc refiner controls the advance and retraction of the blade by adjusting the air pressure in air chamber 1 23 and air chamber 2 25. The consistency of the spacing between the grinding plates on both sides of the grinding area is ensured by balancing the pressure in air chamber 1 23 and air chamber 2 25 on both sides, thereby ensuring the consistency of the pulp produced in the grinding areas on both sides. This avoids the process of overcoming the friction between the moving disc and the main shaft after the worm gear reducer has hard feed, and then self-balancing the pulp pressure. This not only ensures the consistency of the grinding, but also reduces the fluctuation of the motor power to make the equipment run more stable.

[0075] The present invention adopts a pneumatic feed structure, and the advance and retraction of the blade are realized by gas pressure. The air chambers on both sides are connected and the pressure is equal. The pressure is self-balanced with the pulp pressure in the refining area, thereby ensuring that the gap between the refining plates in the refining areas on both sides is consistent, the pulping degree of the output pulp is consistent, the output pulp quality is good and more stable, and the problem of inconsistent refining quality caused by the single-sided feed of the traditional refiner is avoided.

[0076] In addition, compared with the prior art feed device composed of a reduction motor and a worm gear, the pneumatic feed device of the present invention has a simple structure and is easy to maintain. It does not require mechanical transmission devices such as a worm gear reducer, and the advance and retraction of the knife is completed only through the control of a pneumatic tire, a spring and air pressure; the bearing chamber adopts an integrated oil tank structure, and the bearing is lubricated with thin oil, which is convenient for adjustment and maintenance. The water collection device 16 of the present invention can prevent the gas in the air chamber from forming accumulated water to corrode the air chamber, thereby extending the service life of the equipment, and has a simple structure and is easy to operate. The installation position of the water collection tank is lower than the drain port. The gas enters the air chamber 1 23 and the air chamber 2 25, exits from the drain port, passes through the water collection tank, and returns to the air control box. Through the action of gravity, the accumulated water in the air chamber 1 23 and the air chamber 2 25 will flow into the water collection tank along the pipeline. Regularly opening and closing the ball valve of the water collection tank to discharge the accumulated water can ensure that the gas in the air chamber is relatively dry, avoid accumulated water from corroding the air chamber, and extend the service life of the equipment.

[0077] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0078] The above is a preferred embodiment of the present invention, and the description of the specific embodiment is only used to better understand the concept of the present invention. For those skilled in the art, several improvements or equivalent replacements can be made according to the principles of the present invention, and these improvements or equivalent replacements are also considered to fall within the protection scope of the present invention.

Claims

1. A pneumatic feed double-disc pulping machine, comprising a machine body, a machine casing, a machine cover, a bearing chamber, a main shaft transmission mechanism, a spring reset device, a rotating disk, a fixed disk, and a water collecting device, wherein the machine casing is connected to the upper part of one side of the machine body, the bearing chamber is connected to the upper part of the other side of the machine body, the machine casing and the machine cover are sealed by a flange, the machine casing is provided with a second feed port and a discharge port, the fixed disk comprises a first fixed disk and a second fixed disk, the spring reset device comprises a first spring reset device and a second spring reset device, the first fixed disk is connected to the first spring reset device, the second fixed disk is connected to the second spring reset device, and the spring reset Device 1 is connected to the machine cover, spring return device 2 is connected to the machine casing, the fixed plate 1 and the inner side surface are provided with grinding disc 1, the inner side surface of the fixed plate 2 is provided with grinding disc 4, grinding disc 2 and grinding disc 3 are respectively provided on both sides of the rotating disk, the machine casing and the machine cover are sealed and connected to form a closed refining chamber, the spindle transmission mechanism includes a spindle, the spindle is supported on the bearing chamber through a bearing, the rotating disk is connected to one end of the spindle through a key fit, the rotating disk and the end of the spindle are located in a closed cavity, the other end of the spindle is connected to the motor through a coupling to provide power for the equipment, and the annular space inside the casing forms a refining chamber; The upper part of the cover is provided with an air inlet 1, the upper part of the casing is provided with an air inlet 2, the air inlet 1 and the air inlet 2 are respectively connected to the air source control box through pipelines, the lower part of the cover is provided with a drain port 1, the lower part of the casing is provided with a drain port 2, the drain port 1 and the drain port 2 are connected to the water collection device through pipelines; An air chamber 1 is formed between the first fixed plate and the cover, and an air chamber 2 is formed between the second fixed plate and the casing. The first air chamber and the second air chamber are connected to an air source respectively. The first fixed plate and the second fixed plate can move axially under the push of air pressure.

2. A pneumatic feed double disc refiner according to claim 1, characterized in that: The cover is provided with a first mounting hole, the first spring reset device is connected to the cover through the first mounting hole, the casing is provided with a second mounting hole, the second spring reset device is connected to the casing through the second mounting hole; The spring reset device 1 and the spring reset device 2 both include a spring sleeve, a spring, a spring pressure plate, a sealing rubber, a pipe cap plug, a copper sleeve, a spring guide pin, and a bolt. The spring sleeve is connected to the mounting hole 1 or the mounting hole 2. A spring guide pin is arranged inside the spring sleeve, and a spring is sleeved outside the spring guide pin. A bolt passes through the axial hole of the spring guide pin. A spring pressure plate is arranged at one end of the spring, and the spring pressure plate cooperates with the inner side of the bolt head. The other end of the spring cooperates with one end of the copper sleeve, and the copper sleeve is connected to the casing. One end of the spring sleeve is connected to the pipe cap plug through a threaded fit, and a sealing rubber is arranged between the end of the spring sleeve and the inner end face of the pipe cap plug.

3. A pneumatic feed double disc refiner according to claim 2, characterized in that: An annular sealing ring is provided at the flange connection, a sealing groove is provided on the machine cover, and the sealing ring is installed in the sealing groove; A sealing structure is provided at a position close to the casing and the inner side of the cover, and the sealing structure includes pneumatic tire 1 and pneumatic tire 2. Pneumatic tire 1 cooperates with the cover, and pneumatic tire 2 cooperates with the casing. The outer end face of pneumatic tire 1 on the side close to the radial outer position cooperates with the inner end of the cover and the corresponding pneumatic tire outer pressure ring and screws are used to fix the two and seal the air chamber 1. In addition, the outer end face of pneumatic tire 1 on the side close to the radial inner position cooperates with the inner end face of fixed plate 1, and the corresponding pneumatic tire inner pressure ring and screws are used to fix the two and seal the air chamber 1. The pneumatic tire inner pressure ring is bolted to the fixed plate; The outer end face of the second pneumatic tire on the side close to the radial outer position cooperates with the inner end of the casing, and the two are fixed and the air chamber two is sealed by the corresponding pneumatic tire outer pressure ring and screws. In addition, the outer end face of the second pneumatic tire on the side close to the radial inner position cooperates with the inner end face of the second fixed plate, and the two are fixed and the air chamber two is sealed by the corresponding pneumatic tire inner pressure ring and screws. The pneumatic tire inner pressure ring is connected with the fixed plate bolts.

4. A pneumatic feed double disc refiner according to claim 3, characterized in that: The inner holes of the first and second fixed plates are connected to a movable sealing ring respectively, and the contact surfaces of the movable sealing ring and the first and second fixed plates are provided with sealing rings 2 respectively, and the contact positions of the movable sealing ring and the cover or the housing are respectively provided with two V-shaped sealing rings with opposite openings, and the V-shaped sealing rings are respectively installed in the annular holes of the cover or the housing; The pneumatic tire 1 works together with the sealing ring 2, V-shaped sealing ring and sealing gasket on one side of the machine cover to achieve the sealing of the air chamber 1; the pneumatic tire 2 works together with the sealing ring 2, V-shaped sealing ring and sealing gasket on one side of the machine casing to achieve the sealing of the air chamber 2.

5. The pneumatic feed double disc refiner according to claim 1, characterized in that: Bearing seats are provided at both ends of the bearing chamber, bearings are installed in the bearing seats, the main shaft of the main shaft transmission mechanism is supported on the bearing chamber through bearings, lubricating oil is filled in the bearing chamber, and the support and lubrication of the main shaft transmission mechanism are achieved through the bearing chamber.

6. The pneumatic feed double disc refiner according to claim 1, characterized in that: The turntable is connected to the main shaft through a flat key or a spline; When the turntable and the main shaft are splined, the center of the turntable is connected to the spline sleeve, the length of the spline shaft is greater than the length of the spline sleeve, and the turntable can slide axially on the spline shaft; When the turntable and the main shaft are matched with a flat key, a flat key sleeve is welded to the center of the turntable, the turntable is fixed on the main shaft without axial sliding, and the turntable is positioned between the two fixed plates.

7. The pneumatic feed double disc refiner according to claim 1, characterized in that: The machine cover is provided with a feed inlet 1.

8. The pneumatic feed double disc refiner according to claim 1, characterized in that: The casing is provided with an observation port, through which the wear of the grinding disc can be observed.

9. The pneumatic feed double disc refiner according to claim 1, characterized in that: The water collecting device includes a water collecting tank, two steel wire hoses are connected to the water collecting tank through a three-way pipe joint, the installation height of the water collecting tank is lower than the height of the equipment drain port, and the water collecting tank is used to collect water in the equipment air chamber.

10. The pneumatic feed double disc refiner according to claim 1, characterized in that: The machine body, machine casing and machine cover are respectively welded structures; the machine body, the machine casing and the bearing chamber are connected by bolts; and the machine cover is connected to the machine casing by a hinge shaft.

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