Aerodynamic feed double disc refiner

Abstract

The application discloses a kind of aerodynamic feed dual-disc refiner, including machine body, casing, machine cover, rotating disc, fixed disc, casing is connected with machine body, machine cover, inlet two, discharge port are equipped on casing, fixed disc includes fixed disc one, fixed disc two, spring return device includes spring return device one, spring return device two, fixed disc one is connected with spring return device one, fixed disc two is connected with spring return device two, spring return device one is connected with machine cover, spring return device two is connected with casing, casing and machine cover form airtight refiner chamber, rotating disc is connected with main shaft, machine cover is equipped with air inlet one, drain one, casing is equipped with air inlet two, drain two, fixed disc one and machine cover form air chamber one, fixed disc two and casing form air chamber two, air chamber one, air chamber two are connected with gas source, the present application pressure and pulp pressure self-balancing ensure that the gap of two sides of grinding piece is consistent, force is same, output pulp beating degree is consistent, pulp quality is good, prolongs the service life of grinding piece, reduces use cost.

Description

TECHNICAL FIELD

[0001] The present application relates to pulping equipment technical field, especially to a kind of pneumatic tool-feeding double-disc refiner. BACKGROUND

[0002] The double-disc refiner of prior art mostly uses worm gear reducer to feed and retreat tool, and the feed and retreat tool operation is completed by the set power of main motor to drive parallel shaft reducer and worm gear reducer.The feed and retreat tool of this structure is unidirectional, namely, when feeding tool, a group of refiner plates are pushed to feed tool, and the pushing force is transmitted to two groups of refiner plates on the moving disc of refiner through pulp, to drive the moving disc to move to the last group of refiner plates against the friction at the connection with main shaft, which causes the inconsistent stress of fibers in two sides of grinding area, and further, the inconsistent refining effect, so that the pulp produced by two sides of grinding area has inconsistent beating degree, and the produced paper has low quality and poor stability, and even unqualified products, which causes high production cost and poor economic benefit, especially for the production of special paper pulp, the problem is more obvious. SUMMARY

[0003] The present application is to overcome the shortcomings of the prior art, and provide a kind of pneumatic tool-feeding double-disc refiner.The present application uses pneumatic tool-feeding structure, which is simple in structure and convenient to operate, and the feed and retreat tool is realized by gas pressure, the pressure of two sides of gas chamber is equal, the pressure of the present application and the pulp pressure are self-balanced to ensure the consistent gap of two sides of refiner plates, the same force, and the consistent beating degree of output pulp, so that the output pulp has good quality and stability, the service life of equipment accessories refiner plate is prolonged, and the use cost of customers is reduced.

[0004] The technical scheme adopted by the present application to solve its technical problems is:

[0005] A kind of aerodynamic feed double-disc refiner, including body, casing, machine cover, bearing chamber, main shaft transmission mechanism, spring reset device, rotating disc, fixed disc, water collecting device, the casing is connected with the upper part of one side of body, bearing chamber is connected with the upper part of other side of body, the casing is connected with machine cover by flange sealing, the casing is equipped with inlet two, discharge outlet, the fixed disc includes fixed disc one, fixed disc two, the spring reset device includes spring reset device one, spring reset device two, fixed disc one is connected with spring reset device one, fixed disc two is connected with spring reset device two, spring reset device one is connected with machine cover, spring reset device two is connected with casing, the inner side of fixed disc one, inner side of fixed disc two is equipped with abrasive disc one, abrasive disc four, the rotating disc is equipped with abrasive disc two, abrasive disc three respectively in both sides, the casing is sealed and is connected with machine cover to form closed refiner chamber, main shaft transmission mechanism includes main shaft, main shaft is supported on bearing chamber by bearing, the rotating disc is connected with one end of main shaft by key cooperation, the rotating disc and main shaft end portion are located in closed cavity, the other end of main shaft is connected with motor by coupling, and power is provided for equipment, annular space in the casing forms refiner chamber;

[0006] The upper portion of the machine cover is provided with an air inlet one, and the upper portion of the casing is provided with an air inlet two, the air inlet one and the air inlet two are connected with the gas source control box through pipelines respectively, the lower portion of the machine cover is provided with a drain one, and the lower portion of the casing is provided with a drain two, the drain one and the drain two are connected with the water collecting device through pipelines;

[0007] The fixed disc one and the machine cover form an air chamber one, and the fixed disc two and the casing form an air chamber two, the air chamber one and the air chamber two are connected with a high-pressure gas source respectively, and the fixed disc one and the fixed disc two can move axially under the push of air pressure.

[0008] The machine cover is provided with a mounting hole one, the spring reset device one is connected with the machine cover through the mounting hole one, and the casing is provided with a mounting hole two, the spring reset device two is connected with the casing through the mounting hole two;

[0009] The spring reset device one and the spring reset device two both include a spring sleeve, a spring, a spring pressing plate, a sealing rubber, a pipe cap plug, a copper sleeve, a spring guide pin and a bolt, the spring sleeve is connected with the mounting hole one or the mounting hole two, the spring sleeve is provided with the spring guide pin, the spring guide pin is externally sleeved with the spring, the bolt passes through the axial hole of the spring guide pin, the spring pressing plate is arranged at one end of the spring, the spring pressing plate is matched with the inner side of the head of the bolt, one end of the spring is matched with the copper sleeve, the copper sleeve is connected with the casing, one end of the spring sleeve is connected with the pipe cap plug through thread cooperation, and the sealing rubber is arranged between the end of the spring sleeve and the inner end surface of the pipe cap plug.

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

[0011] A sealing structure is arranged near the inner side of the machine cover and the machine shell, which includes air tire one and air tire two. Air tire one cooperates with the machine cover, air tire two cooperates with the machine shell, the outer end face of air tire one near the radial outer position side cooperates with the inner end of the machine cover and is fixed and sealed with air chamber one through the corresponding air tire outer pressure ring and screw, in addition, the outer end face of air tire one near the radial inner position side cooperates with the inner end face of the fixed disc one and is fixed and sealed with air chamber one through the corresponding air tire inner pressure ring and screw, the air tire inner pressure ring is bolted with the fixed disc;

[0012] The outer end face of air tire two near the radial outer position side cooperates with the inner end of the machine shell and is fixed and sealed with air chamber two through the corresponding air tire outer pressure ring and screw, in addition, the outer end face of air tire two near the radial inner position side cooperates with the inner end face of the fixed disc two and is fixed and sealed with air chamber two through the corresponding air tire inner pressure ring and screw, the air tire inner pressure ring is bolted with the fixed disc.

[0013] The inner hole positions of the fixed disc one and the fixed disc two are respectively connected with a moving sealing ring, the moving sealing ring is respectively provided with a sealing ring two on the contact surface of the fixed disc one and the fixed disc two, the contact position of the moving sealing ring with the machine cover or the machine shell is respectively provided with two open reverse V-shaped sealing rings, which are respectively installed in the annular hole of the machine cover or the machine shell;

[0014] The sealing ring two, the V-shaped sealing ring, the sealing gasket on one side of the air tire one cooperates to realize the sealing of air chamber one, the sealing ring two, the V-shaped sealing ring, the sealing ring one and the sealing gasket on one side of the air tire two cooperates to realize the sealing of air chamber two.

[0015] Bearing seats are arranged 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 the bearings, lubricating oil is injected into the bearing chamber, and the support and lubrication of the main shaft transmission mechanism are realized through the bearing chamber.

[0016] The rotating disc is connected with the main shaft through a flat key or a spline, when the rotating disc and the main shaft adopt spline cooperation, a spline sleeve is connected at the center of the rotating disc, the length of the spline shaft is greater than the length of the spline sleeve, and the rotating disc can axially slide on the spline shaft;

[0017] When the rotating disc and the main shaft adopt flat key cooperation, a flat key sleeve is welded at the center of the rotating disc, the rotating disc is fixed on the main shaft and does not axially slide, and the rotating disc is positioned in the middle of the two fixed discs.

[0018] The machine cover is provided with a first feeding port.

[0019] The machine shell is provided with an observation port, and the wear condition of the grinding piece is observed through the observation port.

[0020] The water collecting device comprises a water collecting tank, two steel wire hoses connected with the water collecting tank through a tee joint, and the water collecting tank is installed at a height lower than that of the equipment drain outlet and used for collecting water in the equipment air chamber.

[0021] The body, the shell and the cover are respectively welded; the body and the shell are connected through bolts; and the cover and the shell are connected through a hinge shaft.

[0022] The present application has the following advantages:

[0023] 1. The pneumatic feeding double-disc refiner of the present application comprises spring return devices one and two, the fixed disc one is connected with the spring return device one, the fixed disc two is connected with the spring return device two, the spring return device one is connected with the cover, the spring return device two is connected with the shell, the shell and the cover are sealed to form a closed refiner chamber, the rotating disc is connected with one end of the main shaft through key matching, and the rotating disc and the main shaft end are located in the closed cavity, and the other end of the main shaft is connected with the motor through a coupling to provide power for the equipment; since the present application adopts the pneumatic feeding structure, the pneumatic feeding device is simpler than the feeding device mechanism composed of a speed reducer and a worm gear, and does not need mechanical transmission devices such as a worm gear reducer, and is convenient to operate, the feeding and withdrawing are realized by gas pressure, the two gas chambers are communicated and have equal pressure, the pressure and the pulp pressure in the refiner area are self-balanced to ensure that the gaps of the two sides of the refiner disc are consistent, the forces are the same, the output pulp beating degree is consistent, the output pulp quality is good and stable, the service life of the refiner disc of the equipment accessory is prolonged, and the use cost of the customer is reduced.

[0024] The fixed disc one and the cover form a gas chamber one, the fixed disc two and the shell form a gas chamber two, the gas chamber one and the gas chamber two are connected with a high-pressure gas source, the gas chamber one and the gas chamber two are communicated and have equal pressure, the pressure and the pulp pressure in the refiner area are self-balanced to ensure that the gaps of the two sides of the refiner disc are consistent, the output pulp quality is consistent, the output pulp quality is good and more stable, and the problem of inconsistent refiner quality caused by unilateral feeding of the traditional refiner is avoided.

[0025] The fixed disc one and the fixed disc two can move axially under the push of the gas pressure, the pressure of the gas chamber one and the gas chamber two is adjusted by the pressure adjusting device of the gas control box, the fixed disc is pushed to move towards the rotating disc side, when the motor runs below the set power, the pressure adjusting device increases the pressure in the gas chamber one and the gas chamber two, the fixed disc is pushed to move towards the rotating disc, and the feeding is achieved; when the motor runs above the set power, the pressure adjusting device reduces the pressure of the gas chamber one or the gas chamber two, the fixed disc is pulled back to the position far away from the rotating disc through the spring return device, and the reliable withdrawing is achieved.

[0026] 2. The spring return device one and the spring return device two 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 return device provides a restoring force for the fixed disc. During initial installation, the bolt compresses the spring pressure plate, and at this time, the spring is in a contracted state. An outward force is applied to the spring pressure plate to tighten the fixed disc one and the fixed disc two, so that they can be in contact with the machine body or the machine cover. When the air pressure in the air chamber is increased, the air chamber pressure becomes larger, and the fixed disc one and the fixed disc two move in the direction of the rotating disc to reliably complete the feed. At the same time, the bolt connected with the fixed disc one and the fixed disc two 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 disc one and the fixed disc two will move away from the rotating disc due to the effect of the pulp pressure in the pulp chamber and the restoring force of the spring to reliably complete the retreat.

[0027] 3. An annular sealing ring one is arranged at the flange joint, and a sealing structure is arranged at a position close to the inner side of the machine cover and the machine shell. The sealing structure includes a tire one and a tire two. The tire one cooperates with the machine cover, and the tire two cooperates with the machine shell. The tire one cooperates with the machine cover and is fixed and sealed with the air chamber one through corresponding tire outer pressure rings and screws. The tire one cooperates with the fixed disc one and is fixed and reliably sealed with the air chamber one through corresponding tire inner pressure rings and screws. The tire two cooperates with the machine shell and is fixed and sealed with the air chamber two through corresponding tire outer pressure rings and screws. The tire two is fixed and sealed with the air chamber two through tire inner pressure rings and screws. The tire one, a sealing ring two, a V-shaped sealing ring, and a sealing gasket on one side of the machine cover jointly realize the sealing of the air chamber one. The tire two, a sealing ring two, a V-shaped sealing ring, and a sealing gasket on one side of the machine shell jointly realize the reliable sealing of the air chamber two.

[0028] 4. Bearing seats are arranged 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 the bearings. The bearing chamber is filled with lubricating oil. The bearing chamber reliably and stably supports and lubricates the main shaft transmission mechanism. The bearing chamber simultaneously bears the centrifugal force and the axial force 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 convenient for installation and debugging. The bearing thin oil lubrication is convenient for equipment maintenance. The bearing chamber does not need to be frequently replaced with lubricating oil, which can ensure the lubrication and heat dissipation needs of the bearing during high-speed operation, prolong the service life of the bearing, and improve the operation stability of the equipment.

[0030] 6. The rotating disc is welded from plate materials and pipe materials, which has a simple and firm structure and low cost. The rotating disc is connected with the grinding piece two and the grinding piece three through bolts, which is convenient for replacement and maintenance.

[0031] 7. The rotating disc is connected with the main shaft through a key or spline fitting, the rotating disc center is connected with a spline sleeve, the length of the spline shaft is greater than the length of the spline sleeve, and the rotating disc can slide axially on the key or spline shaft. The precision requirement of the rotating disc positioning in the middle of the fixed disc is reduced, the rotating disc can be automatically centered during work under the pushing of the pulp, the purpose of consistent beating effect of the two grinding areas is achieved, and the beating quality is improved. The rotating disc and the main shaft adopt a key fitting structure, which is simple in structure and can meet the quality requirement of beating.

[0032] 8. The machine housing is provided with an observation port, through which the wear condition of the grinding disc can be conveniently observed to determine whether the grinding disc needs to be replaced. The observation port adopts a detachable connection structure, which can be quickly detached after shutdown to facilitate equipment maintenance.

[0033] 9. The water collecting device comprises a water collecting tank, two steel wire hoses are connected with the water collecting tank through a tee joint, the installation height of the water collecting tank is lower than the height of the equipment drain port, and gas and water in the equipment gas chamber flow to the water collecting tank to be collected in the water collecting tank. The water collecting device can prevent the gas in the gas chamber from forming accumulated water to corrode the gas chamber, prolong the service life of the equipment, and has a simple structure and convenient operation. The installation position of the water collecting tank is lower than the drain port, the gas enters the gas chamber, comes out of the drain port, passes through the water collecting tank and returns to the gas control box, and under the action of gravity, the accumulated water in the gas chamber flows into the water collecting tank along the pipeline. The ball valve of the water collecting tank is opened and closed regularly to drain the accumulated water, which can ensure the relative dryness of the gas in the gas chamber, avoid corrosion of the gas chamber by accumulated water, and prolong the service life of the equipment.

[0034] 10. The machine body, the machine housing and the machine cover adopt a welding structure respectively; the machine body and the machine housing and the bearing chamber are connected through bolts; and the machine cover and the machine housing are connected through a hinge shaft, so that the connection is reliable and the disassembly is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0035] The application will be further described below in combination with the drawings and examples:

[0036] Figure 1 It is a front view of the embodiment in the application;

[0037] Figure 2 It is a left view of Figure 1 ;

[0038] Figure 3 It is an A-A sectional view of Figure 2 ;

[0039] Figure 4 It is a schematic view of the spring return device and the connection relationship structure of the application;

[0040] Figure 5 It is a schematic view of the tool withdrawal limit point structure of the application;

[0041] Figure 6The second structure diagram of the tool withdrawal limit point of the application;

[0042] Figure 7 The structure diagram of the connection between the rotary disc and the main shaft of the application.

[0043] In the figure, 1 is the machine body, 2 is the machine shell, 3 is the machine cover, 4 is the main shaft transmission mechanism, 5 is the moving sealing ring, 6 is the spring return device one, 7 is the rotary disc, 8 is the fixed disc, 9 is the inner pressure ring of the air tire, 10 is the outer pressure ring of the air tire, 11 is the bearing chamber, 12 is the first grinding piece, 13 is the second grinding piece, 14 is the third grinding piece, 15 is the fourth grinding piece, 16 is the water collecting device, 18 is the air tire, 19 is the sealing ring, 20 is the bearing, 21 is the air inlet, 22 is the water outlet, 23 is the air chamber, 24 is the hinged shaft, 25 is the air chamber, 26 is the sealing ring, 27 is the V-shaped sealing ring, 28 is the air tire, 29 is the spring return device two, 31 is the air inlet, 32 is the water outlet, 40 is the main shaft, 41 is the first feeding port, 42 is the discharging port, 43 is the second feeding port, 44 is the grinding chamber, 61 is the spring sleeve, 62 is the spring, 63 is the spring pressing plate, 64 is the sealing gasket, 65 is the pipe cap plug, 66 is the copper sleeve, 67 is the spring guide pin, 68 is the bolt, 71 is the spline sleeve, 72 is the spline shaft, 8 is the fixed disc, 81 is the first fixed disc, 82 is the second fixed disc. DETAILED DESCRIPTION

[0044] In order to make the person in the art better understand the technical solutions in the application, the technical solutions in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all.

[0045] As Figures 1-7As shown, a kind of pneumatic feed double-disc refiner, including body 1, casing 2, machine cover 3, bearing chamber 11, main shaft transmission mechanism 4, spring return device 6, rotating disc 7, fixed disc 8, water collecting device 16, the casing 2 is connected with the upper portion of one side of body 1, bearing chamber 11 is connected with the upper portion of the other side of body 1, the casing 2 is sealed with machine cover 3 by flange connection, the casing 2 is equipped with inlet two 43, discharge port 42, the fixed disc includes fixed disc one 81, fixed disc two 82, the spring return device includes spring return device one 6, spring return device two 29, fixed disc one 81 is connected with spring return device one 6, fixed disc two 82 is connected with spring return device two 29, spring return device one is connected with machine cover 3, spring return device two 29 is connected with casing 2, the inner side of fixed disc one 81 is equipped with abrasive disc one 12, the inner side of fixed disc two 82 is abrasive disc four 15, the rotating disc 7 is equipped with abrasive disc two 13, abrasive disc three 14 respectively on both sides, the casing 2 is sealed with machine cover 3 and is formed into closed refiner chamber 44, main shaft transmission mechanism 4 includes main shaft 40, and main shaft 40 is supported on bearing chamber 11 by bearing, the rotating disc 7 is connected with one end of main shaft 40 by key cooperation, the rotating disc 7 and the end of main shaft 40 are located in closed cavity, the other end of main shaft 40 is connected with motor by coupling, and power is provided for equipment.Refiner chamber 44 refers to the annular space inside the casing, including the gap between rotating disc 7 and fixed disc 8.

[0046] Fixed disc one 81 and machine cover 3 form air chamber one 23, and fixed disc two 82 and casing 2 form air chamber two 25, and fixed disc one 81 and fixed disc two 82 can move in the axial direction under the push of air pressure, but do not rotate, and the moving sealing ring is made of 17-4PH material, is more wear-resistant, and ensures the sealing of air chamber.

[0047] Air chamber one 23 and air chamber two 25 are connected with high-pressure gas source respectively, the high-pressure gas source can adopt gas control box, the high-pressure gas source enters air chamber one 23 and air chamber two 25, the pressure of air chamber one 23 and air chamber two 25 is adjusted by the pressure adjusting device of gas control box, and the fixed disc is pushed to move towards the rotating disc side.The general refiner adopts constant power beating, and the motor maintains the set power operation.When the motor runs below the set power, the pressure adjusting device increases the pressure in air chamber one 23 or air chamber two 25, to achieve the purpose of feed.When the motor runs higher than the set power, the pressure adjusting device reduces the pressure in air chamber one 23 or air chamber two 25, to achieve the purpose of retreat through spring return device.

[0048] The upper portion of the machine cover 3 is equipped with air inlet one 21, and the upper portion of the casing 2 is equipped with air inlet two 31, the air inlet one 21 and the air inlet two 31 are connected with gas source control box through pipeline respectively, the lower portion of the machine cover 3 is equipped with drain port one 22, and the lower portion of the casing 2 is equipped with drain port two 32, the drain port one 22 and the drain port two 32 are connected with water collecting device 16 through pipeline.

[0049] The machine cover 3 is provided with a mounting hole one, the spring return device one 6 is connected with the machine cover 3 through the mounting hole one, the machine shell 2 is provided with a mounting hole two, the spring return device two 29 is connected with the machine shell 2 through the mounting hole two.

[0050] The sealing ring one 19 is arranged between the fixed disc one 81 and the machine cover 3, the sealing groove is arranged on the machine cover, the sealing ring one 19 is arranged in the sealing groove, and the sealing between the fixed disc one 81 and the machine cover 3 is realized through the sealing ring one 19.

[0051] The spring return device 6 comprises a spring sleeve 61, a spring 62 (under the action of a compression force in a working state), a spring pressing 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 adopt a hexagonal pipe cap plug, and the bolt 68 can adopt a hexagonal head bolt; the spring guide pin 67 is arranged in the spring sleeve 61, the spring 62 is sleeved outside the spring guide pin 67, the bolt 68 passes through the axial hole of the spring guide pin 67, the spring pressing plate 63 is arranged at one end of the spring 62, the spring pressing plate 63 is matched with the inner side of the head of the bolt 68, the copper sleeve 66 is matched with the other end of the spring 62, the copper sleeve 66 is connected with the machine shell 2, one end of the spring sleeve 61 is connected with the pipe cap plug 65 through thread cooperation, and the sealing gasket 64 is arranged between the end of the spring sleeve 61 and the inner end face of the pipe cap plug 65;

[0052] The sealing structure is arranged at a position close to the inner side of the machine shell 2 and the machine cover 3.

[0053] The sealing structure is a gas tire, which comprises a gas tire one 18 and a gas tire two 28, the gas tire one 18 is matched with the machine cover 3, and the gas tire two 28 is matched with the machine shell 2, the outer end face of the gas tire one 18 on one side close to the radially outer position is matched with the inner end of the machine cover 3, and the two are fixed and the gas chamber one 23 is sealed through the corresponding gas tire outer compression ring 10 and the screw, in addition, the outer end face of the gas tire one 18 on one side close to the radially inner position is matched with the inner end face of the fixed disc one 81, and the two are fixed and the gas chamber one 23 is sealed through the corresponding gas tire inner compression ring 9 and the screw, the gas tire inner compression ring 9 is connected with the fixed disc bolt, and the function of compressing the gas tire to prevent gas leakage is realized.

[0054] Similarly, the outer end face of the gas tire two 28 on one side close to the radially outer position is matched with the inner end of the machine shell 2, and the two are fixed and the gas chamber two 25 is sealed through the corresponding gas tire outer compression ring 10 and the screw, in addition, the outer end face of the gas tire two 28 on one side close to the radially inner position is matched with the inner end face of the fixed disc two 82, and the two are fixed and the gas chamber two 25 is sealed through the corresponding gas tire inner compression ring 9 and the screw, the gas tire inner compression ring 9 is connected with the fixed disc bolt, and the function of compressing the gas tire to prevent gas leakage is realized.

[0055] The air tire has telescopic characteristics, which can meet the axial movement requirement of the fixed disc, and avoid the problem of being stuck caused by the sealing structure of the inner and outer parts of the fixed disc 1 81 and the fixed disc 2 82.

[0056] The spring return device provides a restoring force for the air tire. During initial installation, the bolt 68 presses the spring plate 63, and at this time, the spring 62 is in a contracted state, giving the spring plate 63 an outward force, and the fixed disc 1 81 and the fixed disc 2 82 are pulled to make them 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 is increased, and the fixed disc 1 81 and the fixed disc 2 82 move in the direction of the rotating disc 7 to complete the feeding, and at the same time, the bolt 68 connected with the fixed disc 1 81 and the fixed disc 2 82 will press the spring plate 63 to make the spring continue to compress. When the air pressure in the air chamber is reduced, the fixed disc 1 81 and the fixed disc 2 82 will move away from the rotating disc 7 due to the effect of the pulp pressure in the pulp chamber and the restoring force of the spring 62 to complete the retraction.

[0057] The inner hole positions of the fixed disc 1 81 and the fixed disc 2 82 are respectively connected with a movable sealing ring 5 through a bolt, and the movable sealing ring 5 is respectively provided with a sealing ring 2 26 on the contact surface of the fixed disc 1 81 and the fixed disc 2 82. The contact positions of the movable sealing ring 5 and the machine cover 3 or the machine shell 2 are respectively provided with two open reverse V-shaped sealing rings 27, and the V-shaped sealing rings 27 are respectively installed in the annular holes of the machine cover 3 or the machine shell 2, and the sealing ring 2 26 and the two reverse V-shaped sealing rings 27 play a bidirectional sealing role. Specifically, the air tire 1 18, the sealing ring 2 26, the V-shaped sealing ring 27 and the sealing gasket 64 on one side of the machine cover 3 jointly realize the sealing of the air chamber 1 23; the air tire 2 28, the sealing ring 2 26, the V-shaped sealing ring 27 and the sealing gasket 64 on one side of the machine shell 2 jointly realize the sealing of the air chamber 2 25.

[0058] An observation port is arranged on the machine shell, through which the wear condition of the grinding plate can be observed to determine whether the grinding plate needs to be replaced. The observation port can adopt a detachable connection structure to realize quick disassembly after shutdown.

[0059] The machine cover 3 is provided with a feeding port 1 41. The feeding port 1 41 is arranged on one side of the outer end of the machine cover 3.

[0060] Bearing seats are arranged at both ends of the bearing chamber 1 1, 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 1 1 through the bearings 20, and the bearing chamber 1 1 is filled with lubricating oil, thereby realizing the support and lubrication of the main shaft transmission mechanism 4. The bottom can be connected with the machine body 1 through a bolt. The bearing chamber simultaneously bears the centrifugal force and the axial force, thereby ensuring the normal operation of the equipment. The 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, facilitating installation and debugging, and the bearing thin oil lubrication facilitates equipment maintenance, the bearing chamber does not need frequent replacement of lubricating oil, can guarantee the lubrication and heat dissipation demand of the bearing in high-speed operation, prolongs the service life of the bearing, and improves the operation stability of the equipment.

[0062] The rotating disc 7 is welded by sheet material and pipe material, simple and firm structure, low cost, the rotating disc 7 is connected with the grinding piece two 13 and the grinding piece three 14 through bolts, convenient to replace and maintain.

[0063] The rotating disc 7 is connected with the main shaft through a flat key or a spline.

[0064] Combination Figure 7 When the rotating disc 7 and the main shaft adopt spline cooperation, the rotating disc 7 is connected with the spline sleeve 71 in the center, the length of the spline shaft 72 is greater than that of the spline sleeve 71, the rotating disc can slide axially on the spline shaft, the precision requirement of the rotating disc positioning in the middle of the fixed disc is reduced, the rotating disc can be automatically centered in the working process under the pushing of the slurry, the beating quality is further improved, and the purpose of consistent beating effect of two grinding areas is achieved.

[0065] When the rotating disc 7 and the main shaft adopt flat key cooperation, the rotating disc 7 is welded with a flat key sleeve in the center, the rotating disc 7 is fixed on the main shaft 40 and cannot slide axially, and the rotating disc is accurately positioned in the middle of the two fixed discs.

[0066] The fixed disc 8 adopts a forge piece, is connected with the grinding piece one 12 and the grinding piece four 15 through bolts, simple structure, convenient to process and replace and maintain.

[0067] The machine body 1 adopts a fully welded structure, firm and cost-saving, the machine body 1 is connected with the machine shell 2 and the bearing chamber 11 through bolts, convenient to install and disassemble.

[0068] The machine shell 2 is welded by sheet material and pipe material, simple and firm structure.

[0069] The machine cover 3 is welded by sheet material and pipe material, simple and firm structure, is connected with the machine shell 2 through a hinge shaft and bolts, convenient to install and maintain.

[0070] The water collecting device 16 comprises a water collecting tank, two steel wire hoses are connected with the water collecting tank through a tee joint, the installation height of the water collecting tank is lower than the height of the equipment drain port, gas and water in the equipment gas chamber flow to the water collecting tank and are collected in the water collecting tank, so that water in the gas can be prevented from gathering in the gas chamber to form accumulated water and corrode the gas chamber.

[0071] The working principle of the double-disc beater of the papermaking machine is as follows:

[0072] Through relative rotation of the rotating disc 7 and the fixed disc 8, the slurry is ground, sheared and extruded, so that the beating treatment of the slurry is realized, and the specific description is as follows:

[0073] Slurry delivery: After the raw material for papermaking is preliminarily processed, the slurry is formed and enters the double-disc refiner from the first feeding port 41 and the second feeding port 43. The slurry entering the refiner is evenly distributed to the area between the two grinding discs. The motor drives the rotating disc 7 to rotate at a high speed through a transmission device, and the rotating speed is usually several hundred revolutions per minute to several thousand revolutions per minute. The fixed disc 8 remains stationary, and the rotating disc 7 and the fixed disc 8 move relative to each other. Refining process: When the slurry enters the area between the rotating disc 7 and the fixed disc 8, it is subjected to the action of the tooth patterns and grooves on the surface of the grinding disc. As the rotating disc 7 rotates, the tooth patterns 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 rotating disc 7 and the fixed disc 8, the slurry is also subjected to extrusion and shearing force. Under the combined action of these forces, the fibers in the slurry are cut, fibrillated, and become more flexible and delicate, and the length and morphology of the fibers are adjusted, thereby improving the bonding force and interweaving ability of the fibers. Slurry discharge: After the refining process, the slurry is discharged from the edge of the grinding disc under the action of centrifugal force and the pushing action of the tooth patterns on the grinding disc, and enters the subsequent papermaking process.

[0074] The pneumatic feed double-disc refiner controls the feed and retreat of the knife by adjusting the air pressure in the air chamber 23 and the air chamber 25, and ensures the consistency of the grinding disc spacing on both sides by balancing the air pressure in the air chamber 23 and the air chamber 25 on both sides, thereby ensuring the consistency of the paper pulp produced on both sides, avoiding the process of overcoming the friction between the rotating disc and the main shaft after the hard feed of the worm gear reducer, and then balancing the paper pulp pressure, which not only ensures the consistency of the refining, but also reduces the fluctuation of the motor power to make the equipment run more stably.

[0075] The present application adopts a pneumatic feed structure, and the feed and retreat of the knife are realized by gas pressure. The air chambers on both sides are communicated, and the pressure is equal. The pressure and the paper pulp pressure in the refining area are self-balanced to ensure the consistency of the grinding disc gap on both sides, the consistency of the beating degree of the produced paper pulp, the good quality of the produced paper pulp, and the stability of the produced paper pulp. The problem of inconsistent refining quality caused by the traditional single-side feed of the refiner is avoided.

[0076] In addition, the pneumatic tool feed device of the present application is simple in structure, easy to maintain, and does not need mechanical transmission devices such as worm gear reducers, and only uses air tires, springs and air pressure control to complete the feeding and retracting of the tool; the bearing chamber adopts an integrated oil tank structure, and the bearings are lubricated with thin oil, which is convenient to adjust and maintain. The water collecting device 16 of the present application can prevent the gas in the gas chamber from forming accumulated water to corrode the gas chamber, prolong the service life of the equipment, and is simple in structure and easy to operate. The installation position of the water collecting tank is lower than the water outlet, and the gas entering the gas chamber 23 and the gas chamber 25 comes out from the water outlet, passes through the water collecting tank and returns to the air control box. Through the action of gravity, the accumulated water in the gas chamber 23 and the gas chamber 25 will flow into the water collecting tank along the pipeline, and the ball valve of the water collecting tank is opened regularly to discharge the accumulated water, which can ensure the relative dryness of the gas in the gas chamber, avoid the corrosion of the accumulated water to the gas chamber, and prolong the service life of the equipment.

[0077] In the description of the present application, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and do not require the present application to be constructed or operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In the present application, "connected" and "connected" should be understood broadly, for example, it can be connected, or it can be detachable connection; it can be direct connection, or indirect connection through intermediate components, and those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0078] The above is the preferred embodiment of the present application, and the description of the specific examples is only for better understanding the idea of the present application. For ordinary skilled in the art, according to the principle of the present application, several improvements or equivalent replacements can also be made, which are also considered to fall within the protection scope of the present application.

Claims

1. A pneumatic feed double-disc refiner, comprising a body, a casing, a cover, a bearing chamber, a main shaft transmission mechanism, a spring return device, a rotating disc, a fixed disc, a water collecting device, the casing being connected with the upper part of one side of the body, the bearing chamber being connected with the upper part of the other side of the body, the casing being sealingly connected with the cover through a flange, the casing being provided with a second feed inlet and a discharge outlet, the fixed disc comprising a first fixed disc and a second fixed disc, the spring return device comprising a first spring return device and a second spring return device, the first fixed disc being connected with the first spring return device, the second fixed disc being connected with the second spring return device, the first spring return device being connected with the cover, the second spring return device being connected with the casing, the inner side of the first fixed disc being provided with a grinding plate one, the inner side of the second fixed disc being provided with a grinding plate four, the rotating disc being provided with a grinding plate two and a grinding plate three on the two sides respectively, the casing and the cover being sealingly connected to form a closed refining chamber, the main shaft transmission mechanism comprising a main shaft, the main shaft being supported on the bearing chamber through a bearing, the rotating disc being connected with one end of the main shaft through key cooperation, the rotating disc and the end of the main shaft being located in a closed cavity, the other end of the main shaft being connected with a motor through a shaft coupling to provide power for the equipment, the annular space inside the casing forming a refining chamber; the cover being provided with an air inlet one on the upper part, the casing being provided with an air inlet two on the upper part, the air inlet one and the air inlet two being connected with a gas source control box through pipelines respectively, the cover being provided with a drainage port one on the lower part, the casing being provided with a drainage port two on the lower part, the drainage port one and the drainage port two being connected with the water collecting device through pipelines; an air chamber one being formed between the first fixed disc and the cover, an air chamber two being formed between the second fixed disc and the casing, the air chamber one and the air chamber two being connected with a gas source respectively, the first fixed disc and the second fixed disc being able to move axially under the push of air pressure.

2. A pneumatic entry double-disc refiner according to claim 1, characterized in that the cover being provided with a mounting hole one, the first spring return device being connected with the cover through the mounting hole one, the casing being provided with a mounting hole two, the second spring return device being connected with the casing through the mounting hole two; the first spring return device and the second spring return device both comprising a spring sleeve, a spring, a spring pressure plate, a sealing gasket, a pipe cap plug, a copper sleeve, a spring guide pin and a bolt, the spring sleeve being connected with the mounting hole one or the mounting hole two, the spring sleeve being provided with a spring guide pin inside, the spring guide pin being provided with a spring outside, the bolt being passed through the axial hole of the spring guide pin, the spring pressure plate being provided on one end of the spring, the spring pressure plate being matched with the inner side of the head of the bolt, the other end of the spring being matched with one end of the copper sleeve, the copper sleeve being connected with the casing, one end of the spring sleeve being connected with the pipe cap plug through thread cooperation, the sealing gasket being provided between the end of the spring sleeve and the inner end face of the pipe cap plug.

3. A pneumatic entry double-disc refiner according to claim 2, characterized in that an annular sealing ring one being provided at the flange connection, a sealing groove being provided on the cover, the sealing ring one being installed in the sealing groove; A sealing structure is arranged near the inner side of the machine shell and the machine cover, which includes air tire one and air tire two. The air tire one cooperates with the machine cover, and the air tire two cooperates with the machine shell. The outer end face of the air tire one near the radial outer position side cooperates with the inner end of the machine cover and is fixed and sealed with the air chamber one through the corresponding air tire outer pressure ring and screw. In addition, the outer end face of the air tire one near the radial inner position side cooperates with the inner end face of the fixed disc one, and is fixed and sealed with the air chamber one through the corresponding air tire inner pressure ring and screw. The air tire inner pressure ring is bolted with the fixed disc. The outer end face of the air tire two near the radial outer position side cooperates with the inner end of the machine shell and is fixed and sealed with the air chamber two through the corresponding air tire outer pressure ring and screw. In addition, the outer end face of the air tire two near the radial inner position side cooperates with the inner end face of the fixed disc two, and is fixed and sealed with the air chamber two through the corresponding air tire inner pressure ring and screw. The air tire inner pressure ring is bolted with the fixed disc.

4. A pneumatic entry double-disc refiner according to claim 3, characterized in that The inner hole positions of the fixed disc one and the fixed disc two are respectively connected with a movable sealing ring. The movable sealing ring is respectively provided with a sealing ring two on the contact surface of the fixed disc one and the fixed disc two. The contact position of the movable sealing ring with the machine cover or the machine shell is respectively provided with two open reverse V-shaped sealing rings, which are respectively arranged in the annular hole of the machine cover or the machine shell. The sealing ring two, the V-shaped sealing ring and the movable sealing ring on one side of the air tire one cooperatively seal the air chamber one. The sealing ring two, the V-shaped sealing ring and the movable sealing ring on one side of the air tire two cooperatively seal the air chamber two.

5. A pneumatic entry double-disc refiner according to claim 1, characterized in that The bearing chamber is provided with a bearing seat at both ends, and the bearing is arranged in the bearing seat. The main shaft of the main shaft transmission mechanism is supported on the bearing chamber through the bearing. The bearing chamber is filled with lubricating oil, and the support and lubrication of the main shaft transmission mechanism are realized through the bearing chamber.

6. A pneumatic entry double-disc refiner according to claim 1, characterized in that The rotating disc is connected with the main shaft through a flat key or a spline. When the rotating disc and the main shaft are spline-connected, the rotating disc is connected with a spline sleeve at the center, and the length of the spline shaft is greater than the length of the spline sleeve. The rotating disc can axially slide on the spline shaft. When the rotating disc and the main shaft are flat-key-connected, the rotating disc is welded with a flat-key sleeve at the center. The rotating disc is fixed on the main shaft and does not axially slide. The rotating disc is positioned between the two fixed discs.

7. A pneumatic entry double-disc refiner according to claim 1, characterized in that The machine cover is provided with a feeding port one.

8. A pneumatic entry double-disc refiner according to claim 1, characterized in that The machine shell is provided with an observation port for observing the wear of the grinding piece.

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

10. A pneumatic entry double-disc refiner according to claim 1, characterized in that The machine body, the machine shell and the machine cover are respectively welded structures. The machine body and the machine shell are connected through bolts, and the machine cover and the machine shell are connected through a hinge shaft.

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