Cyclic crushing and dust removing device for sodium carboxymethyl cellulose

Abstract

The invention relates to the technical field of sodium carboxymethyl cellulose granulation, in particular to a sodium carboxymethyl cellulose cyclic crushing and dust removal device which is characterized in that a feeding barrel assembly, a spiral conveyor and a screening assembly are fixed on a rack; the screening assembly comprises a discharging outer barrel body, a discharging inner barrel body and a sorting assembly; the bottom end of a discharging port of the feeding barrel assembly is connected with a smashing pipe body. The smashing pipe body is sequentially provided with a crushing cavity, a convex ring, a lower cavity and a filtering cavity from top to bottom in the height direction. The valve element assembly is used for sealing the end face of the convex ring in the rotating state of the crushing cutter body. A plurality of filtering holes are uniformly distributed in the surface of the filtering cavity; a sealing box is sleeved outside the filtering cavity; and an air inlet pipe of the air purification device is communicated with the sealing box. The screening device has the beneficial effects that the screening efficiency and the screening precision are improved, and dust adhering to the surfaces of finished product granules is reduced through dust removal treatment before screening in the granulating process, so that the dissolving speed of sodium carboxymethyl cellulose is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of sodium carboxymethyl cellulose granulation, in particular to a sodium carboxymethyl cellulose circulating pulverizing and dust removing device. Background Art

[0002] Sodium carboxymethyl cellulose is a type of cellulose with a wide range of applications and large consumption. It is widely used in oil industry well drilling mud treatment agents, synthetic detergents, organic builders, textile printing and dyeing sizing agents, water-soluble colloidal thickeners for daily chemical products, thickeners and emulsifiers for the pharmaceutical industry, thickeners for the food industry, adhesives for the ceramic industry, industrial pastes, sizing agents for the paper industry, etc. When sodium carboxymethyl cellulose needs to be dissolved in water before use, due to the small gaps between the powdered carboxymethyl cellulose and the small surface area of ​​the powder on the water, it is easy to clump and float on the water surface during the dissolution process, and the dissolution speed is slow, so it is necessary to control the water temperature and stir the dissolution, etc.; sodium carboxymethyl cellulose made into particles of a certain particle size can avoid the above problems and speed up the dissolution speed.

[0003] In the process of sodium carboxymethyl cellulose granulation, the sodium carboxymethyl cellulose wet material is mixed with the cooked rubber in a certain proportion to form a mixture, and then it is crushed and screened several times to form granules of specified specifications. In the process of crushing and granulation, on the one hand, it is necessary to screen the particles with larger particle size and then put them back into the crushing device for reprocessing to the specified specifications. On the other hand, the dust-grade granules with small particle size and easy to adhere to the surface of qualified granules are removed to eliminate the influence on the later dissolution. At the same time, granules containing a large amount of dust entering the screening device will also block the screening powder holes and affect the granulation efficiency; therefore, removing the dust in the crushing and granulation process is not only beneficial to improve the screening efficiency, but also to improve the quality of sodium carboxymethyl cellulose granules. Summary of the invention

[0004] The purpose of the present invention is to improve the sodium carboxymethyl cellulose granulating device in view of the defects and shortcomings of the prior art, and to provide a sodium carboxymethyl cellulose circulating pulverizing and dust removing device.

[0005] The sodium carboxymethyl cellulose circulating crushing and dust removal device of the present invention comprises a frame; a feed barrel assembly, a screw conveyor and a screening assembly are fixed on the frame; the screening assembly comprises a discharge outer barrel body, a discharge inner barrel body and a sorting assembly; the screw conveyor is used to convey the granular material on the discharge outer barrel body to the feed barrel assembly;

[0006] The bottom end of the discharge port of the feed barrel assembly is connected with a crushing tube body; the crushing tube body is provided with a crushing cavity, a convex ring, a lower cavity and a filter cavity in sequence from top to bottom along the height direction; a crushing knife body is provided inside the crushing cavity; a valve core assembly is provided inside the lower cavity; the valve core assembly is used to seal the end face of the convex ring when the crushing knife body is rotating; a crushing motor is provided on the feed barrel assembly; the output end of the crushing motor is fixed to the crushing knife body; the top of the crushing tube body is connected with the feed barrel assembly; a plurality of filter holes are evenly distributed on the surface of the filter cavity; a sealing box is covered on the outside of the filter cavity; an air purification device is fixed on the frame; the air intake pipe of the air purification device is connected with the sealing box.

[0007] Furthermore, the inner hole diameter of the filter cavity is larger than the inner hole diameter of the crushing cavity; a plurality of spring bars are arranged on the inner side wall of the filter cavity; one end of the spring bar is fixed on the inner side wall of the filter cavity.

[0008] Furthermore, the valve core assembly includes a sealing plate driving motor, a screw nut, a screw threaded in the screw nut and a sealing plate connected to the screw nut; the top edge of the sealing plate is provided with a chamfered surface connected to the top surface; the screw nut is slidably connected to the inner surface of the crushing tube body; one end of the sealing plate driving motor is fixed to the inner surface of the crushing tube body through a second motor bracket; the other end of the sealing plate driving motor is fixed to the screw.

[0009] Furthermore, connecting rods are provided on both sides of the screw nut; guide posts are fixed on the connecting rods; the crushing tube body is provided with guide grooves slidably connected to the guide posts; a feed groove is provided at one end of the crushing tube body extending into the feed barrel assembly; the feed groove is provided on the side of the crushing tube body;

[0010] The inner surface of the pulverizing tube body is provided with a groove connected with the feed groove; the groove is connected with the guide groove; a sealing ring is slidably connected in the groove; the guide column is fixed on the sealing ring; a sealing ring feed groove is provided on the side surface of the sealing ring; a spring is connected between the sealing plate and the screw nut;

[0011] The feed barrel assembly consists of a feed outer barrel body and an inner partition coaxially arranged inside the feed outer barrel body; the crushing motor is fixed inside the inner partition; the top end of the crushing tube body is fixedly connected to the bottom end of the inner partition.

[0012] Furthermore, a feed storage chamber is formed between the feed outer barrel and the inner partition cylinder; the exhaust pipe of the air purification device is connected to the feed storage chamber; and a pressure relief valve is connected to the feed storage chamber.

[0013] Furthermore, the sorting component is a centrifugal plate arranged on the top surface of the discharge inner cylinder; a retaining ring is arranged on the bottom surface of the centrifugal plate; the retaining ring is rotatably connected to the inner side wall of the discharge inner cylinder; a plurality of sieve holes are evenly distributed on the surface of the centrifugal plate; the sieve holes are all arranged above the discharge inner cylinder; a screening motor is arranged inside the discharge inner cylinder; the screening motor is fixed to the discharge inner cylinder through a first motor bracket; the output end of the screening motor is fixed to the centrifugal plate.

[0014] Furthermore, a plurality of retaining rings coaxially arranged with the centrifugal plate are arranged on the surface of the centrifugal plate; the cross section of the retaining ring is a semicircular shape with the opening facing downward; a support ring is arranged on the inner side wall of the discharge outer barrel; and a cover plate is placed on the support ring.

[0015] Furthermore, the height from the top of the retaining ring to the surface of the centrifugal plate is the retaining ring height; the retaining ring height is equal to 0.2 to 0.35 times the diameter of the sieve hole.

[0016] Furthermore, a hemispherical convex surface is provided at the rotation center of the centrifugal plate; the hemispherical convex surface is coaxially arranged with the crushing tube body; a plurality of circles of diverter strip groups are provided on the surface of the centrifugal plate; the diverter strip group is coaxially arranged with the hemispherical convex surface; the diverter strip group is composed of a plurality of U-shaped diverter plates; the diverter plates are distributed in a circle on the centrifugal plate; the diverter plates between adjacent diverter strip groups are staggered.

[0017] Furthermore, the diverter plate is a U-shaped plate; the bottom of the U-shaped plate faces the center of the centrifugal plate; and the bottom of the U-shaped plate is configured to be a V-shaped cone.

[0018] At least one of the above technical solutions can achieve the following beneficial effects:

[0019] 1. Reduce the small-size particles and dust entering the screening component, prevent the screening holes in the screening component from being blocked, and improve the screening efficiency, screening accuracy and screening efficiency.

[0020] 2. During the granulation process, dust removal before screening can reduce dust adhesion on the surface of the finished granules, thus ensuring the rapid dissolution of sodium carboxymethyl cellulose granules.

[0021] 3. Through vacuuming and screening, qualified particles are screened, and large particles are returned through the screw conveyor to form an internal circulation. There is no need for additional manual processing of large particles, which reduces labor intensity and improves the efficiency of granulation.

[0022] 4. The amount of each crushing is determined by the volume of the crushing chamber. The mixed material is crushed in small batches, which makes it easy to adjust the speed of the crushing motor, so that the particle size of the finished product is stable and the yield is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a first perspective stereogram of the present invention;

[0024] Figure 2 is a second viewing angle stereogram of the present invention;

[0025] Figure 3 is a cross-sectional view of the feed barrel assembly;

[0026] Figure 4 It is a cross-sectional view of the crushing motor and the crushing tube body connected to the feed barrel assembly;

[0027] Figure 5 It is a stereoscopic view of the crushing tube body;

[0028] Figure 6 It is a structural diagram of the valve core assembly;

[0029] Figure 7 This is a structural diagram of the valve core assembly in the crushing tube body;

[0030] Figure 8 It is a structural diagram of half of the crushing tube body;

[0031] Fig. 9 is a cross-sectional view of a crushing tube body;

[0032] Fig.10 It is a structural diagram of the screening assembly;

[0033] Fig.11 is a stereogram of the screening assembly;

[0034] Fig.12 It is a structural diagram of the connection between the centrifugal plate and the screening motor;

[0035] Fig.13 is a top view of the centrifugal plate;

[0036] Fig.14 It is a partial view of the centrifugal plate;

[0037] Description of reference numerals:

[0038] A, feed barrel assembly; A1, feed door; A2, pressure relief valve; A3, feed outer barrel; A4, feed storage chamber; A5, inner partition; B, crushing motor; B1, crushing knife body; C, screw conveyor; C1, return material discharge pipe; C2, return material feed pipe; D, rack; E, air purification device; E1, exhaust pipe; E2, intake pipe; F, screening assembly; F1, screening motor; F101, first motor bracket; F2, discharge outer barrel; F3, discharge inner barrel; F4, support ring; F5, cover plate; G, sealing box; H, crushing tube; H1, feed trough; H2, filter chamber; H201, filter hole; H3, material distribution baffle; H4, guide groove; H401, avoidance hole; H5, spring bar; H6, convex ring; H7, crushing chamber; H8, lower chamber; H9, groove; I, valve core assembly; I1, sealing ring; I101, sealing ring feed groove; I2, guide column; I3, sealing plate; I301, chamfered surface; I4, spring; I5, screw nut; I501, connecting rod; I6, screw; I7, sealing plate drive motor; I701, second motor bracket; J, centrifugal plate; J1, baffle ring; J2, roller; J3, hemispherical convex surface; J4, diverter plate; J401, V-shaped cone; J5, baffle ring; J6, sieve hole. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] like Figures 1 to 14 As shown, a sodium carboxymethyl cellulose circulating crushing and dust removal device of the present invention comprises a frame D; a feed barrel assembly A, a screw conveyor C and a screening assembly F are fixed on the frame D; the screening assembly F comprises a discharge outer barrel body F2, a discharge inner barrel body F3 and a sorting assembly; the sorting assembly is used to sort the granular materials with large particle size to the discharge outer barrel body F2; the sorting assembly is used to sort the granular materials with small particle size to the discharge inner barrel body F3; the screw conveyor C is used to convey the granular materials in the discharge outer barrel body F2 to the feed barrel assembly A; a crushing tube body H is connected to the bottom end of the discharge port of the feed barrel assembly A; the crushing tube body H is provided with a crushing cavity H7, a convex ring H6, a lower cavity H8 and a filter cavity H2 in sequence from top to bottom along the height direction;

[0041] A crushing knife body B1 is arranged inside the crushing cavity H7; the crushing knife body B1 matches the inner cavity of the crushing cavity H7; a valve core assembly I is arranged inside the lower cavity H8; the valve core assembly I is used to seal the end face of the convex ring H6 when the crushing knife body B1 is rotating; a crushing motor B is arranged on the feed barrel assembly A; the output end of the crushing motor B is fixed on the crushing knife body B1; the top of the crushing tube H is connected to the feed barrel assembly A;

[0042] The surface of the filter chamber H2 is uniformly provided with a plurality of filter holes H201; the outside of the filter chamber H2 is covered with a sealing box G; an air purification device E is fixed on the frame D; an air inlet pipe E2 of the air purification device E is connected to the sealing box G;

[0043] The crushing knife body B1 has no essential difference from the prior art, so it is not described in detail; according to the particle size of the processed pellets, the speed of the crushing motor B is adjusted and the model of the corresponding crushing knife body B1 is selected; the cross-sectional area of ​​the crushing chamber H7 can be designed according to the production capacity; the air purification device E and the screw conveyor C have no essential difference from the prior art, so it is not described in detail; the inlet and outlet ends of the screw conveyor C are respectively connected to the return material feed pipe C2 and the return material discharge pipe C1;

[0044] The feed barrel assembly A is provided with a feed gate A1, which is opened when the preliminarily crushed mixed material needs to be added; in the crushing working state, the feed gate A1 is closed; the valve core assembly I is sealed on the convex ring H6, so that the bottom end of the crushing cavity H7 is in a sealed state;

[0045] The mixed material in the feed barrel assembly A enters the crushing chamber H7, and the crushing motor B drives the crushing blade body B1 to move. After the crushing reaches the set time, the valve core assembly I separates from the convex ring H6, and the granular material in the crushing chamber H7 enters the screening assembly F through the convex ring H6, the lower chamber H8, and the filter chamber H2;

[0046] The granular materials that meet the specifications are sorted into the inner discharging barrel F3 and the granular materials that do not meet the specifications are sorted into the outer discharging barrel F2 through the screening component F; the granular materials in the inner discharging barrel F3 are discharged and bagged through the discharge pipe at the bottom; the granular materials in the outer discharging barrel F2 re-enter the feed barrel component A through the funnel, return feed pipe C2, screw conveyor C and return discharge pipe C1 arranged at the bottom of the outer discharging barrel F2; when the granular materials enter the filter chamber H2, due to the strong negative pressure generated by the air purification device E, the dust with smaller particle size is sucked from the filter hole H201 for filtration and collection, thereby greatly reducing the entry of small particle size granular materials and dust into the screening component F.

[0047] As a preferred embodiment of the present invention, the inner hole diameter of the filter chamber H2 is larger than the inner hole diameter of the crushing chamber H7; a plurality of spring bars H5 are arranged on the inner side wall of the filter chamber H2; one end of the spring bar H5 is fixed on the inner side wall of the filter chamber H2, and the other end is a free end; when the pellets fall into the filter chamber H2, the pellets will elastically collide with the spring bar H5, and the first collision changes the movement direction of the pellets, causing the pellets to bounce up and collide with the pellets in the incoming direction for the second time, and each collision causes the dust adhering to the pellets to separate from the pellets due to inertia and be sucked into the filter chamber H2; in addition, the spring bar H5 is integrated in the filter chamber H2, and the plurality of spring bars H5 generate micro-vibrations due to the impact, which can cause the filter chamber H2 to vibrate with a high frequency and a small amplitude, which helps to remove the dust accumulated in the filter hole H201 and reduce the risk of clogging the filter hole H201. By enlarging the diameter of the filter cavity H2, in addition to being able to arrange more spring bars H5, the activity space of the particles can be larger, the number of times the particles come into contact with the spring pieces can be increased, the dust can be separated from the particles more easily, and the dust removal effect of the particles can be improved.

[0048] As a preferred embodiment of the present invention, the valve core assembly I includes a sealing plate driving motor I7, a screw nut I5, a screw I6 threadedly connected to the screw nut I5, and a sealing plate I3 connected to the screw nut I5; the top surface edge of the sealing plate I3 is provided with a chamfered surface I301; the screw nut I5 is slidably connected to the inner surface of the crushing tube body H; one end of the sealing plate driving motor I7 is fixed to the inner surface of the crushing tube body H through a second motor bracket I701, and the other end is fixed to the screw I6;

[0049] The diameter of the sealing plate I3 is larger than the inner hole diameter of the convex ring H6, and the diameter of the sealing plate I3 is smaller than the diameter of the lower cavity H8; the sealing plate driving motor I7 drives the screw rod I6 to rotate, and the screw rod nut I5 pushes the sealing plate I3 to move, and the chamfered surface I301 of the sealing plate I3 seals the convex ring H6 to ensure that when the crushing knife body B1 is working and the crushing cavity H7 is fed, the mixed material that has not been completely crushed in the crushing cavity H7 will not fall into the lower cavity H8; when the mixed material in the crushing cavity H7 is crushed to the specified time, the sealing plate driving motor I7 drives the screw rod I6 to rotate, so that the screw rod nut I5 pushes the sealing plate I3 to move downward, and the sealing plate I3 leaves the convex ring H6 for a distance. Due to the action of gravity, the material in the crushing cavity H7 will pass through the convex ring H6 and fall into the filter cavity H2 from the inner wall of the lower cavity H8.

[0050] As a preferred embodiment of the present invention, connecting rods I501 are provided on both sides of the screw nut I5; guide posts I2 are fixed on the connecting rods I501; the crushing tube H is provided with a guide groove H4 slidably connected to the guide post I2; a feed groove H1 is provided at one end of the crushing tube H extending into the feed barrel assembly A; the feed groove H1 is provided on the side of the crushing tube H;

[0051] The inner surface of the crushing tube body H is provided with a groove H9 connected with the feed groove H1; the groove H9 is connected with the guide groove H4; a sealing ring I1 is slidably connected in the groove H9; the guide column I2 is fixed on the sealing ring I1; a sealing ring feed groove I101 is provided on the side surface of the sealing ring I1; a spring I4 is connected between the sealing plate I3 and the screw nut I5;

[0052] The feed barrel assembly A is composed of a feed outer barrel body A3 and an inner partition A5 coaxially arranged inside the feed outer barrel body A3; the crushing motor B is fixed in the inner partition A5; the top end of the crushing tube H is fixedly connected to the bottom end of the inner partition A5;

[0053] In order to facilitate processing, the crushing tube body H is composed of two semicircular tubes, which can facilitate the opening of the guide groove H4. An avoidance hole H401 is also opened on the sliding path of the connecting rod I501, which can be used for avoiding the sliding of the connecting rod I501.

[0054] After the sealing plate driving motor I7 is driven, the screw nut I5 will produce three different effects. The first is that the sealing plate I3 leaves the convex ring H6 for a distance, so that the material in the crushing chamber H7 is discharged into the filter chamber H2. In this state, the sealing ring I1 blocks the feed slot H1, and the material in the feed outer barrel A3 cannot enter the crushing tube H. The second is that the spring I4 presses the sealing plate I3 against the convex ring H6 for sealing, and the sealing ring I1 blocks the feed slot H1. This state is the working state of the crushing knife body B1, and the crushing tube H can neither feed nor discharge materials. The third type is that the screw nut I5 continues to rise, and the sealing ring I1 continues to be pushed upward until the sealing ring feed groove I101 is aligned with the feed groove H1, the spring I4 is further compressed, and the sealing plate I3 maintains the state of pressing against the convex ring H6; the mixed material in the feeding outer barrel A3 can enter the grinding tube H through the feed groove H1 and the sealing ring feed groove I101; the three states of feeding, sealing and discharging of the valve core assembly I are switched through a linear motion module, and the different states of automatic feeding, discharging and forming the grinding tube H into an independent grinding space are completed. The valve body structure inside the grinding tube H is more streamlined, reducing the total cost of the valve body.

[0055] In addition to being used to install the crushing motor B, the inner spacer A5 is also used to provide exhaust space for the mixed material to enter the crushing tube H after the convex ring H6 is sealed on the chamfered surface I301 of the sealing plate I3, thereby ensuring that the crushing tube H is fed more smoothly.

[0056] As a preferred embodiment of the present invention, a feed storage chamber A4 is formed between the feed outer barrel A3 and the inner partition A5; the exhaust pipe E1 of the air purification device E is connected to the feed storage chamber A4; and a pressure relief valve A2 is connected to the feed storage chamber A4;

[0057] The power of the air purification device E is selected according to the pressure provided to the feed storage chamber A4;

[0058] Two pipelines are provided on the air purification device E; the first pipeline includes an air inlet pipe E2, a filter element of the air purification device E, a fan of the air purification device E and a first air outlet; the second pipeline includes a second air inlet, a filter element of the air purification device E, a fan of the air purification device E and an exhaust pipe E1;

[0059] The two pipelines are controlled on and off by solenoid valves respectively;

[0060] The pressure relief valve A2 has no essential difference from the prior art, so it will not be described in detail.

[0061] When the first pipeline is used, the dust in the filter chamber H2 is filtered. The gas in the filter chamber H2 passes through the air inlet pipe E2, the filter element of the air purifier E and the fan of the air purifier E, and is discharged from the first air outlet. When the second pipeline is used, the external air enters from the second air inlet, passes through the filter element of the air purifier E and the fan of the air purifier E, and enters the feed storage chamber A4 through the exhaust pipe E1.

[0062] When the feeding storage chamber A4 feeds into the crushing tube body H, the second pipeline is opened, and a positive pressure is generated in the feeding storage chamber A4 through the air purification device E, thereby accelerating the mixed material in the feeding storage chamber A4 to enter the crushing tube body H, and preventing the material from being stuck at the bottom of the feeding storage chamber A4; the air entering the feeding storage chamber A4 is purified and filtered, which can reduce the pollution of the feeding storage chamber A4; because the air is continuously supplied to the feeding storage chamber A4 by the air purification device E on one side, and the exhaust is adjusted on the other side by setting the pressure relief valve A2, the feeding storage chamber A4 can meet the air pressure for accelerating the feeding while ensuring that the air pressure in the feeding storage chamber A4 is not too high.

[0063] As a preferred embodiment of the present invention, the sorting component is a centrifugal plate J arranged on the top surface of the discharge inner cylinder F3; a retaining ring J1 is arranged on the bottom surface of the centrifugal plate J; the retaining ring J1 is rotatably connected to the inner wall of the discharge inner cylinder F3; a plurality of sieve holes J6 are evenly distributed on the surface of the centrifugal plate J; the sieve holes J6 are all arranged above the discharge inner cylinder F3; a screening motor F1 is arranged inside the discharge inner cylinder F3; the screening motor F1 is fixed to the discharge inner cylinder F3 through a first motor bracket F101; the output end of the screening motor F1 is fixed to the centrifugal plate J;

[0064] The outer surface of the retaining ring J1 is provided with a roller J2 which is closely attached to the inner surface of the discharge inner cylinder F3; the roller J2 forms a rolling connection with the discharge inner cylinder F3;

[0065] The screening motor F1 drives the centrifugal plate J to rotate, and the particles falling from the filter chamber H2 enter the surface of the centrifugal plate J; the rotation of the centrifugal plate J provides a tangential speed for the particles, so that the particles are gradually dispersed automatically along the radial direction; the particles that meet the specifications fall from the sieve holes J6 into the discharge inner barrel F3, and the particles that do not meet the specifications fly out from the outside of the centrifugal plate J and fall into the discharge outer barrel F2.

[0066] As a preferred embodiment of the present invention, a plurality of retaining rings J5 coaxial with the centrifugal plate J are arranged on the surface of the centrifugal plate J; the cross section of the retaining ring J5 is in a semicircular shape with the opening facing downward; a support ring F4 is arranged on the inner side wall of the discharge outer barrel F2; a cover plate F5 is placed on the support ring F4;

[0067] By providing a multi-layer retaining ring J5, on the one hand, the radial movement of the pellets can be slowed down, making it easier for the pellets that meet the specifications to enter the sieve hole J6; on the other hand, when the pellets pass through the retaining ring J5, they roll over, changing the movement direction of the pellets, causing the pellets to bounce like waves between the cover plate F5 and the centrifugal plate J, thereby increasing the probability of the pellets entering the sieve hole J6, allowing the pellets to be screened out more quickly, so that the diameter of the centrifugal plate J can be made smaller, and the volume of the entire screening assembly F can also be smaller.

[0068] As a preferred embodiment of the present invention, the height from the top of the retaining ring J5 to the surface of the centrifugal plate J is the retaining ring height; the retaining ring height is equal to 0.2 to 0.35 times the diameter of the sieve hole J6; the height from the top of the retaining ring J5 to the surface of the centrifugal plate J is equivalent to the radius of the retaining ring J5, therefore, the height of the retaining ring J5 is smaller than the radius of the pellets, so that the pellets can smoothly jump up and roll when encountering the retaining ring J5, thereby increasing the probability of the pellets entering the sieve hole J6 and improving the screening accuracy and screening efficiency.

[0069] As a preferred embodiment of the present invention, the rotation center of the centrifugal plate J is provided with a hemispherical convex surface J3; the hemispherical convex surface J3 is coaxially arranged with the crushing tube body H; a plurality of circles of diverter strip groups are arranged on the surface of the centrifugal plate J; the diverter strip group is coaxially arranged with the hemispherical convex surface J3; the diverter strip group is composed of a plurality of U-shaped diverter plates J4; the diverter plates J4 are distributed circumferentially on the centrifugal plate J;

[0070] The diverter plates J4 between adjacent diverter strip groups are staggered;

[0071] The bottom of the crushing tube H is evenly provided with a plurality of material dividing baffles H3; the material dividing baffles H3 can disperse the granular materials so that the granular materials can enter the centrifugal plate J more evenly;

[0072] The number of the diverter strip groups is at least two, and the number of the diverter strip groups is set according to the discharge speed of the pulverizing tube body H.

[0073] The pellets entering the crushing tube H are diverted to all directions of the centrifugal plate J through the hemispherical convex surface J3, and multi-level diversion is formed through the multi-group diversion strip group. In addition, when the pellets move radially, they successively encounter the diversion plate J4 of different retaining rings J5 and diversion strip groups for dispersion and deceleration, which can not only divert the pellets into multiple streams to prevent the pellets from piling up, but also reduce the speed of the radial movement of the pellets and prolong the time the materials move on the centrifugal plate J. The combined effect of the two can increase the chance of the pellets contacting the sieve holes J6 and improve the screening efficiency.

[0074] As a preferred embodiment of the present invention, the diverter plate J4 is a U-shaped plate; the bottom of the U-shaped plate is arranged toward the center of the centrifugal plate J; the bottom of the U-shaped plate is arranged to be a V-shaped cone J401; the V-shaped cone J401 can complete diversion and rapid guidance; a material channel is formed between the two diverter plates J4, and because the pellets change their movement direction after being diverted by the V-shaped cone J401, they collide and rebound with the side surfaces of the adjacent diverter plates J4, thereby increasing the probability of the pellets passing through the sieve hole J6, thereby further improving the screening accuracy and screening efficiency.

[0075] When using the present invention, the working process is as follows: Step 1, open the feed door A1, and put the pre-crushed mixture into the feed storage chamber A4. Step 2, start the sealing plate drive motor I7, and the sealing plate I3 is sealed on the end face of the convex ring H6, so that the bottom of the crushing chamber H7 is sealed, and the sealing ring feed groove I101 is aligned with the feed groove H1, and the mixture in the feed storage chamber A4 enters the crushing chamber H7 through the feed groove H1. Step 3, after the crushing chamber H7 is filled with the mixture, the sealing plate drive motor I7 is started again, and the sealing ring I1 moves, so that the sealing ring feed groove I101 and the feed groove H1 are misaligned, and the mixture in the feed storage chamber A4 cannot enter the crushing chamber H7; at the same time, due to the force of the spring I4, the sealing plate I3 is also sealed at the bottom of the crushing chamber H7. Step 4, the crushing motor B drives the crushing knife body B1 to move in the crushing chamber H7 to crush the mixture for a certain period of time. In step 5, the sealing plate driving motor I7 is started again, and the sealing plate I3 moves to be separated from the convex ring H6. In this state, the sealing ring feed slot I101 and the feed slot H1 remain misaligned, so that the pellets can fall from the gap between the convex ring H6 and the sealing plate I3. In step 6, the pellets (including the transitionally crushed pellet powder) enter the filter chamber H2 and collide with the spring bar H5. After the collision, the pellets change their movement path and collide with the spring bar H5, so that the powder on the surface of the pellets is separated from the pellets; the powder is sucked away from the filter hole H201, and the pellets fall from the bottom of the filter chamber H2 to between the cover plate F5 and the diverter plate J4. In step 7, the pellets are diverted to all directions of the centrifugal plate J through the hemispherical convex surface J3. The rotating centrifugal plate J generates centrifugal force, which makes the pellets disperse outward. Finally, the pellets with a particle size smaller than the sieve hole J6 fall from the sieve hole J6 to the discharge inner barrel F3; the pellets with a particle size larger than the sieve hole J6 are sorted from the edge of the centrifugal plate J to the discharge outer barrel F2. In this step, the retaining ring J5 is set to reduce the speed of the radial movement of the pellets on the one hand, so that the pellets that meet the specifications can enter the sieve hole J6 more easily; on the other hand, when the pellets pass through the retaining ring J5, they roll over and change the movement direction of the pellets, so that the pellets jump in a wave-like manner between the cover plate F5 and the centrifugal plate J, increasing the probability of the pellets entering the sieve hole J6. The pellets are dispersed into multiple streams of pellets and reduced in speed through the multi-stage displaced diverter plate J4. In step 8, the screw conveyor C recovers the larger-diameter particles in the discharge outer barrel F2 and puts them into the feed storage chamber A4 through the return feed pipe C2 and the return discharge pipe C1.

[0076] Through this embodiment, the beneficial effects of the present invention are:

[0077] 1. Reduce the small-size particles and dust entering the screening component, prevent the screening holes in the screening component from being blocked, and improve the screening efficiency, screening accuracy and screening efficiency.

[0078] 2. During the granulation process, dust removal before screening can reduce dust adhesion on the surface of the finished granules, thus ensuring the rapid dissolution of sodium carboxymethyl cellulose granules.

[0079] 3. Through vacuuming and screening, qualified particles are screened, and large particles are returned through the screw conveyor to form an internal circulation. There is no need for additional manual processing of large particles, which reduces labor intensity and improves the efficiency of granulation.

[0080] 4. The amount of each crushing is determined by the volume of the crushing chamber. The mixed material is crushed in small batches, which makes it easy to adjust the speed of the crushing motor, so that the particle size of the finished product is stable and the yield is higher.

[0081] 5. The granular materials and multiple spring bars make the over-crushed dust separate from the granular materials due to inertia and be sucked into the air purification device together with the granular materials with a particle size smaller than the filter holes; and the granular materials hit the spring bars to generate micro-vibration, which can make the filter cavity vibrate with a high frequency and a small amplitude, which helps to remove the dust accumulated in the filter holes and reduce the risk of filter hole blockage.

[0082] 6. A linear motion module is used to switch the three states of the valve core assembly, namely, feeding, sealing and discharging. Automatic feeding and discharging are completed, and an independent crushing space of the crushing tube is formed. This can make the valve body structure inside the crushing tube more streamlined and the equipment cost lower.

[0083] 7. When feeding materials from the feeding storage chamber into the crushing tube body (in the non-dust removal state), the purified air discharged by the original air purification device is used to generate positive pressure in the feeding storage chamber, thereby accelerating the material in the feeding storage chamber to enter the crushing tube body and preventing the material from being stuck at the bottom of the feeding storage chamber.

[0084] 8. By setting up multiple layers of retaining rings and diverter strips to slow down the pellets, on the one hand, the pellets that meet the specifications are easier to enter the sieve holes; on the other hand, when the pellets pass through the retaining rings, they roll over, changing the direction of movement of the pellets, making the pellets do wave-like jumping between the cover plate and the centrifugal plate, further increasing the probability of the pellets passing through the sieve holes and improving the screening efficiency of qualified pellets. At the same time, the diameter of the centrifugal plate can also be made smaller, and the volume of the entire screening component can also be made smaller.

[0085] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A sodium carboxymethyl cellulose circulating crushing and dust removal device, comprising a frame (D); a feed barrel assembly (A), a screw conveyor (C) and a screening assembly (F) are fixed on the frame (D); the screening assembly (F) comprises a discharge outer barrel body (F2), a discharge inner barrel body (F3) and a sorting assembly; the screw conveyor (C) is used to convey the granular material on the discharge outer barrel body (F2) to the feed barrel assembly (A); Features: The bottom end of the discharge port of the feed barrel assembly (A) is connected to a crushing tube body (H); the crushing tube body (H) is provided with a crushing cavity (H7), a convex ring (H6), a lower cavity (H8) and a filtering cavity (H2) in order from top to bottom along the height direction; a crushing knife body (B1) is provided inside the crushing cavity (H7); a valve core assembly (I) is provided inside the lower cavity (H8); the valve core assembly (I) is used to seal the end face of the convex ring (H6) when the crushing knife body (B1) is in a rotating state; The feed barrel assembly (A) is provided with a crushing motor (B); the output end of the crushing motor (B) is fixed to the crushing knife body (B1); the top of the crushing tube body (H) is connected to the feed barrel assembly (A); a plurality of filter holes (H201) are evenly distributed on the surface of the filter cavity (H2); the outside of the filter cavity (H2) is covered with a sealing box (G); an air purification device (E) is fixed to the frame (D); the air intake pipe (E2) of the air purification device (E) is connected to the sealing box (G).

2. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 1, characterized in that: The inner hole diameter of the filter cavity (H2) is larger than the inner hole diameter of the crushing cavity (H7); a plurality of spring bars (H5) are arranged on the inner side wall of the filter cavity (H2); one end of the spring bar (H5) is fixed on the inner side wall of the filter cavity (H2).

3. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 1, characterized in that: The valve core assembly (I) comprises a sealing plate driving motor (I7), a screw nut (I5), a screw (I6) threadedly connected to the screw nut (I5), and a sealing plate (I3) connected to the screw nut (I5); the top edge of the sealing plate (I3) is provided with a chamfered surface (I301) connected to the top surface; the screw nut (I5) is slidably connected to the inner surface of the pulverizing tube body (H); one end of the sealing plate driving motor (I7) is fixed to the inner surface of the pulverizing tube body (H) through a second motor bracket (I701); the other end of the sealing plate driving motor (I7) is fixed to the screw (I6).

4. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 3, characterized in that: Connecting rods (I501) are arranged on both sides of the screw nut (I5); guide posts (I2) are fixed on the connecting rods (I501); the pulverizing tube body (H) is provided with a guide groove (H4) slidably connected to the guide post (I2); a feed groove (H1) is arranged at one end of the pulverizing tube body (H) extending into the feed barrel assembly (A); the feed groove (H1) is arranged on the side of the pulverizing tube body (H); The inner surface of the pulverizing tube body (H) is provided with a groove (H9) connected with the feed groove (H1); the groove (H9) is connected with the guide groove (H4); a sealing ring (I1) is slidably connected in the groove (H9); the guide column (I2) is fixed on the sealing ring (I1); a sealing ring feed groove (I101) is provided on the side surface of the sealing ring (I1); a spring (I4) is connected between the sealing plate (I3) and the screw nut (I5); The feed barrel assembly (A) is composed of a feed outer barrel body (A3) and an inner partition cylinder (A5) coaxially arranged inside the feed outer barrel body (A3); the crushing motor (B) is fixed inside the inner partition cylinder (A5); the top end of the crushing tube body (H) is fixedly connected to the bottom end of the inner partition cylinder (A5).

5. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 4, characterized in that: A feed storage chamber (A4) is formed between the feed outer barrel (A3) and the inner partition cylinder (A5); an exhaust pipe (E1) of the air purification device (E) is connected to the feed storage chamber (A4); and a pressure relief valve (A2) is connected to the feed storage chamber (A4).

6. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 1, characterized in that: The sorting component is a centrifugal plate (J) arranged on the top surface of the discharge inner cylinder (F3); a retaining ring (J1) is arranged on the bottom surface of the centrifugal plate (J); the retaining ring (J1) is rotatably connected to the inner wall of the discharge inner cylinder (F3); a plurality of sieve holes (J6) are evenly distributed on the surface of the centrifugal plate (J); the sieve holes (J6) are all arranged above the discharge inner cylinder (F3); a screening motor (F1) is arranged inside the discharge inner cylinder (F3); the screening motor (F1) is fixed to the discharge inner cylinder (F3) through a first motor bracket (F101); and the output end of the screening motor (F1) is fixed to the centrifugal plate (J).

7. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 6, characterized in that: A plurality of retaining rings (J5) coaxially arranged with the centrifugal plate (J) are arranged on the surface of the centrifugal plate (J); the cross section of the retaining ring (J5) is in a semicircular shape with the opening facing downward; a support ring (F4) is arranged on the inner side wall of the discharge outer barrel (F2); and a cover plate (F5) is placed on the support ring (F4).

8. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 7, characterized in that: The height from the top of the retaining ring (J5) to the surface of the centrifugal plate (J) is the retaining ring height; the retaining ring height is equal to 0.2 to 0.35 times the diameter of the sieve hole (J6).

9. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 7, characterized in that: The centrifugal plate (J) is provided with a hemispherical convex surface (J3) at the center of rotation; the hemispherical convex surface (J3) is coaxially arranged with the crushing tube body (H); a plurality of circles of diverter strip groups are arranged on the surface of the centrifugal plate (J); the diverter strip group is coaxially arranged with the hemispherical convex surface (J3); the diverter strip group is composed of a plurality of U-shaped diverter plates (J4); the diverter plates (J4) are distributed in a circular pattern on the centrifugal plate (J); and the diverter plates (J4) between adjacent diverter strip groups are staggered.

10. A sodium carboxymethyl cellulose circulating crushing and dust removal device according to claim 9, characterized in that: The diverter plate (J4) is a U-shaped plate; the bottom of the U-shaped plate faces the center of the centrifugal plate (J); the bottom of the U-shaped plate is configured to form a V-shaped cone (J401).

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