CN115178463B - Screening plant is used in chlorinated polyethylene production - Google Patents

Abstract

The invention discloses a screening device for chlorinated polyethylene production, which comprises a bracket body, a storage material cylinder arranged on the bracket body, a conveying mechanism arranged on the bracket body, a rotary vibration screen body arranged on the bracket body and used for screening chlorinated polyethylene particles, and an adjusting component arranged on the conveying mechanism and used for controlling the conveying capacity of the chlorinated polyethylene particles; set up in the support body, a screening subassembly for carrying out reprocessing work to the chlorinated polyethylene particle of the caking situation of appearing, this screening plant is used in chlorinated polyethylene production, utilize the adjusting part to carry to controlling to the inside particle volume of sieve body that shakes soon, avoid the too much and lead to the screening incomplete of particle transmission volume, simultaneously under screening subassembly's effect, the effectual partial caking particle that has been directed against, make the caking particle to handle, the work load of follow-up pulverizer has further been reduced, can handle slightly to being greater than the particle of qualified size simultaneously in the transportation.

Description

Screening plant is used in chlorinated polyethylene production

Technical Field

The invention relates to the technical field of chlorinated polyethylene processing, in particular to a screening device for chlorinated polyethylene production.

Background

Chlorinated Polyethylene (CPE) is a novel high polymer material prepared by performing chlorine substitution reaction on hydrogen atoms on a main chain of high-density polyethylene (HDPE), and the appearance of the Chlorinated Polyethylene (CPE) is white powder. Chlorinated Polyethylene (CPE) is widely applied to wires and cables, waterproof coiled materials and rubber hoses of adhesive tapes and is used as an impact modifier in plastic rubber products due to excellent oil resistance, weather resistance, aging resistance, chemical corrosion resistance, electrical insulation and flame retardance;

the production process of chlorinated polyethylene mainly comprises the steps of emulsification, chlorination, deacidification, neutralization, dealkalization, centrifugal dehydration, drying, screening, coating homogenization, inspection and packaging, in the actual production process, the chlorinated polyethylene discharged from a dryer is matched into a pneumatic conveying pipe through a screw meter, is conveyed into a rotary vibration screen before grinding through pneumatic pressure, and removes particles with larger size under the action of the rotary vibration screen, so that the particle size distribution meets the standard requirement, and holes of the screen are designed according to the screening size to ensure that the Chlorinated Polyethylene (CPE) particles meeting the requirement are separated from a lower layer, and the Chlorinated Polyethylene (CPE) particles not meeting the requirement are separated from an upper layer to be ground if the chlorinated polyethylene does not meet the requirement;

in the actual operation in-process, the chlorinated polyethylene after the drying shifts to feed bin department, and carry to the sieve in-process that shakes soon through pneumatic conveying pipe, for convenient rapid transit, general direction of delivery is for carrying down from last, and then the too fast situation of transport rate can appear often, it is too much to lead to shaking the particle distribution in the sieve soon, and then when carrying out screening work, the less particle of part size can be deposited between the great particle of size, and enter into to the grinding region along with it, in order to increase the regional processing burden of grinding, for this reason, we propose a sieving mechanism for chlorinated polyethylene production.

Disclosure of Invention

The invention aims to provide a screening device for producing chlorinated polyethylene, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a screening plant is used in chlorinated polyethylene production, include the support body, set up in storage feed cylinder on the support body with set up in conveying mechanism on the support body, be provided with the sieve body that shakes soon that is used for carrying out screening work to chlorinated polyethylene particle on the support body, wherein the business turn over material mouth at conveying mechanism both ends be connected with storage feed cylinder discharge gate and the sieve body feed inlet that shakes soon respectively, be provided with a plurality of transport discharge gates on the sieve body that shakes soon, still include:

the adjusting component is arranged on the conveying mechanism and used for controlling the conveying capacity of the chlorinated polyethylene particles;

the screening component is arranged on the bracket body and used for reprocessing the chlorinated polyethylene particles with the caking condition, and a feeding port of the screening component is connected with one of the conveying and discharging ports on the rotary vibration screen body;

the adjusting assembly comprises an adjusting control plate arranged inside the conveying mechanism, a rotating shaft used for being connected with the inner wall of the conveying mechanism in a rotating mode is arranged on the adjusting control plate, the rotating shaft penetrates through the inner wall of the conveying mechanism and extends to the outside, an arc-shaped groove used for being connected with the adjusting control plate in a sliding mode is formed in the inner wall of the conveying mechanism, a first motor is installed on the conveying mechanism, chain wheels are arranged at the output end of the first motor and the end, extending to the outside of the conveying mechanism, of the rotating shaft, and the chain wheels are connected through chain transmission;

the screening component comprises a material conveying frame arranged on a support body, the material conveying frame is composed of a feeding area, a separating area and a screening area, wherein an acting piece is arranged on the inner wall of the feeding area in parallel, the acting piece comprises a rotating panel arranged on the inner wall of the feeding area, the rotating panel is rotatably connected with the inner wall of the feeding area, a plurality of small friction blocks are arranged on the inner wall of the opposite side of the rotating panel in the feeding area, a second motor is arranged on the material conveying frame, the output end of the second motor penetrates through the inner wall of the material conveying frame and extends into the material conveying frame, a connecting column is arranged at the output end of the second motor, a driving column is sleeved on the connecting column, a plurality of separating panels are arranged on the driving column at intervals upwards along the circumference, a plurality of protruding blocks are arranged in the separating area, and a plurality of discharge grooves are arranged at the connecting position of the separating area and the screening area.

Preferably, conveying mechanism bottom inner wall is provided with and is used for rather than rotating the cylinder of being connected between it, just cylinder end runs through the conveying mechanism inner wall and extends to the outside, wherein be provided with the baffle on the cylinder, cylinder end is provided with the control lever, and conveying mechanism one side is provided with the circular recess, just the inside control button that is provided with of circular recess.

Preferably, a cavity is formed in the conveying mechanism, a magnetic part is arranged on the baffle, and a magnet which is in an attraction state with the magnetic part is arranged at the bottom of the conveying mechanism.

Preferably, the inside of the rotary vibration sieve body is provided with a filtering screen in parallel.

Preferably, screening region department is provided with the separation filter screen, just be provided with the conveyer belt on the spliced pole, and conveyer belt tip is provided with the fixed column, the fixed column is located separation region inside, wherein parallel arrangement has the cam on the fixed column.

Compared with the prior art, the invention has the beneficial effects that:

the invention utilizes the adjusting component to control the amount of particles conveyed to the interior of the rotary vibration sieve body, avoids incomplete sieving caused by excessive particle conveying amount, effectively aims at partial caking particles under the action of the sieving component, treats the caking particles, further reduces the workload of a subsequent pulverizer, can treat the particles slightly larger than a qualified size in the transportation process, and sieves the particles after complete treatment, and effectively ensures the processing qualification rate of the chlorinated polyethylene product.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of the adjusting assembly of the present invention;

FIG. 4 is a partial schematic view of the present invention;

FIG. 5 is an enlarged view of the area A in FIG. 4;

FIG. 6 is a bottom view of the conveying mechanism of the present invention;

FIG. 7 is a schematic view of the present invention with the stent body removed;

FIG. 8 is a schematic illustration of a screen assembly according to the present invention;

FIG. 9 is a partial cross sectional structural view of a screen assembly according to the present invention;

FIG. 10 is an enlarged view of the area B in FIG. 9 according to the present invention;

FIG. 11 is a schematic illustration of a partial configuration of screen assemblies in accordance with the present invention;

FIG. 12 is a schematic view of another angle structure of the material conveying frame of the present invention;

figure 13 is a schematic view of a cam configuration in a screen assembly according to the present invention.

In the figure: 1-a stent body; 2-a storage cartridge; 3-a conveying mechanism; 4-rotating and vibrating the screen body; 5-a regulating component; 6-screening components; 31-a cavity; 32-a magnet; 41-filtering screen mesh; 42-conveying material port; 51-adjusting the control panel; 52-a rotating shaft; 53-arc-shaped groove; 54-a first motor; 55-chain wheel; 56-cylinder; 57-baffle; 58-a control lever; 59-circular groove; 50-control buttons; 571-magnetic elements; 61-a material conveying frame; 62-a feeding area; 63-a separation region; 64-a screening zone; 65-an acting element; 66-small friction block; 67-motor two; 68-connecting column; 69-a drive column; 60-a separation panel; 601-raised blocks; 602-a discharge chute; 641-separating screen; 651-rotating the panel; 681-conveyor belts; 682-fixing columns; 683-cam.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-13, the present invention provides a technical solution: a kind of chlorinated polyethylene production uses the screening plant, this scheme has solved in the existing production and processing course of chlorinated polyethylene, need to input the treated chlorinated polyethylene into the rotary vibrating screen to carry on the screening work, in the course of transporting, often appear transport rate too fast lead to sift incomplete situation, and then some particle that the size is smaller can be stored among the particle that the size is bigger, and enter into the grinding area along with it, in order to increase the processing burden of grinding area, this scheme carries on the corresponding improvement to the above-mentioned problem;

the device comprises a bracket body 1, a storage material cylinder 2 fixedly arranged on the bracket body 1 and a conveying mechanism 3 arranged on the bracket body 1, wherein a feeding port of the conveying mechanism 3 is positioned at a discharging port of the storage material cylinder 2, the storage material cylinder 2 is a container for storing the treated chlorinated polyethylene, a rotary vibrating screen body 4 for screening the chlorinated polyethylene particles is fixedly arranged on the bracket body 1, a feeding port of the rotary vibrating screen body 4 is positioned below a discharging port of the storage material cylinder 2, three layers of filtering screens 41 are arranged in the rotary vibrating screen body 4, and a conveying port 42 is arranged at each layer of filtering screen 41, further, the first layer of filtering screen 41 is used for blocking the large-size chlorinated polyethylene particles, the second layer of filtering screen 41 is used for blocking the chlorinated polyethylene particles between the large size and the qualified size, the third layer is used for blocking the qualified-size chlorinated polyethylene particles, and the chlorinated polyethylene particles are further conveyed in the process of the rotary vibrating screen body 4, the chlorinated polyethylene particles are gradually screened by the filtering screens 41, aiming at the problem mentioned in the scheme, the conveying mechanism 3 is provided with a conveying component for controlling the conveying amount of the polyethylene particles, and the conveying component 5 for controlling the conveying amount of the polyethylene particles through the conveying component; simultaneously, because the situation of caking can appear often in part chlorinated polyethylene particle, and then this scheme is provided with the screening subassembly 6 that is used for carrying out reprocessing work to the chlorinated polyethylene particle that appears the caking situation on support body 1.

Specifically, chlorinated polyethylene particles are pneumatically fed into the conveying mechanism 3 in the storage barrel 2, the amount of the particles entering the rotary vibration sieve body 4 is controlled under the action of the adjusting component 5, incomplete screening caused by excessive feeding is avoided, three layers of filtering screens 41 installed inside the rotary vibration sieve body 4 are utilized, corresponding screening work can be performed according to the sizes of the chlorinated polyethylene particles, large-size chlorinated polyethylene particles obstructed by the first layer of filtering screen 41 are directly conveyed to a grinding machine through a conveying port 42 corresponding to the layer for processing, medium-size chlorinated polyethylene particles obstructed by the second layer of filtering screen 41 are processed under the action of the screening component 6, the screening processing mode is processing during transportation, the transportation terminal end of the screening mode is mixed with third-layer qualified chlorinated polyethylene particles, the subsequent work amount is further reduced, further, the large-size chlorinated polyethylene particles obstructed by the first layer of filtering screen 41 are processed during transportation, most of the screening mode is processing during transportation, the screening mode is further processed by mixing with third-layer qualified chlorinated polyethylene particles, the large-size chlorinated polyethylene particles are subjected to be subjected to agglomeration processing, the processing efficiency of the two chlorinated polyethylene particles is improved by the corresponding simple operation, and the processing mode is used for improving the efficiency of the overall operation of the two chlorinated polyethylene particles.

The adjusting assembly 5 in the present scheme includes an adjusting control plate 51 located inside the conveying mechanism 3, and a rotating shaft 52 for rotationally connecting with the inner wall of the conveying mechanism 3 is fixedly installed on the adjusting control plate 51, wherein the rotating shaft 52 penetrates through the inner wall of the conveying mechanism 3 and extends to the outside, further, the adjusting control plate 51 in the present scheme is provided with two rotating shafts 52 inside the conveying mechanism 3, the inner wall of the conveying mechanism 3 is provided with an arc-shaped groove 53 for slidably connecting with the adjusting control plate 51, a motor one 54 is fixedly installed outside the conveying mechanism 3, the output end of the motor one 54 is provided with a chain wheel 55, and the end of the chain wheel 55 is connected to the end of the rotating shaft 52, so that the chain wheel 55 is driven by the motor one 54 to rotate the two rotating shafts 52, so that the rotating shaft 52 can drive the adjusting control plate 51 to perform corresponding position adjustment, thereby achieving the purpose of controlling the amount of conveyed particles, and the conveying mechanism 3 is provided with a cavity 31 inside;

the inner wall of the bottom of the conveying mechanism 3 is provided with a cylinder 56 which is used for being rotatably connected with the inner wall of the bottom of the conveying mechanism 3, the end part of the cylinder 56 penetrates through the inner wall of the conveying mechanism 3 and extends to the outside, a baffle 57 is fixedly arranged on the cylinder 56, further, a torsion spring is connected between the cylinder 56 and the inner wall of the bottom of the conveying mechanism 3 in the scheme, and the torsion spring is the prior art, so that the torsion spring is not described in the scheme, wherein the end part of the cylinder 56, which is positioned at the outside, is provided with a control rod 58, one side of the conveying mechanism 3 is provided with a circular groove 59, a control button 50 is arranged in the circular groove 59, the control button 50 is electrically connected with a motor 54, one side end part of the baffle 57 is fixedly provided with a magnetic part 571, and the bottom of the conveying mechanism 3 is provided with a magnet 32 which is in an attraction state with the magnetic part 571;

specifically, when the chlorinated polyethylene particles in the conveying mechanism 3 are transported, the adjusting control plate 51 is in an initial state (in a state perpendicular to the inner wall of the arc-shaped groove 53, and does not block the chlorinated polyethylene particles), the particles directly act on the baffle 57, when the weight of the particles exceeds the elastic force of the torsion spring and the magnetic force between the magnetic member 571 and the magnet 32, i.e. F1 is greater than F2+ F3, where F1 is the weight of the particles, F2 and F3 are the elastic force of the torsion spring and the magnetic force between the magnetic member 571 and the magnet 32, respectively, so that the baffle 57 rotates under the action of the cylinder 56, at this time, the discharge port is opened, the control rod 58 is driven to synchronously rotate during the rotation of the cylinder 56, so that the control rod 58 touches the control button 50 in the circular groove 59, the control button 50 sends a signal to the motor one 54, the motor one 54 drives and rotates the rotating shaft 52 through the chain wheel 55, so that the rotating shaft 52 drives the adjusting control plate 51 to perform directional position adjustment along the arc-shaped groove 53, the adjusting control plate moves from the initial position of the arc-shaped groove 53 to the tail end, at this time, the control plate has a blocking effect on the transportation of particles, so as to achieve the purpose of controlling the amount of the particles conveyed to the rotary vibration sieve body 4, the particles conveyed to the rotary vibration sieve body 4 are subjected to sieving operation under the action of the particles, meanwhile, the cylinder 56 gradually returns to the initial state under the action of the torsion spring and acts on the control button 50 again, the control button 50 sends a signal to the motor one 54, according to the actual inspection effect, the motor one 54 waits for about 10 seconds and then performs recovery operation after receiving the signal of the control button 50, and further, the rotary vibration sieve body 4 is ensured to have a small amount of particles inside before feeding next time, on one hand, the rotary vibration sieve body 4 is ensured to be in sieving operation all the time, on the other hand, the condition of incomplete screening caused by excessive feeding amount in the screening process is avoided.

The screening component 6 in the scheme comprises a material conveying frame 61 fixedly arranged on a bracket body 1, wherein the material conveying frame 61 is composed of a material feeding area 62, a separating area 63 and a screening area 64, and further, the separating area 63 is set to be a round roller, wherein the inner wall of the material feeding area 62 is provided with an acting piece 65 in parallel, the acting piece 65 comprises a rotating panel 651 arranged on the inner wall of the material feeding area 62, and the rotating panel 651 is rotatably connected with the inner wall of the material feeding area 62, wherein two rotating panels 651 are arranged in parallel in the material feeding area 62, a torsion spring is connected between the rotating panel 651 and the inner wall of the material feeding area 62, as the torsion spring is the prior art, the scheme is not described too much, and a plurality of small friction blocks 66 are arranged on the inner wall of the material feeding area 62, so that when medium-sized particles (which do not meet the size of qualified particles) enter the material feeding area 62, the rotating panel 651 can act on the rotating panel 651 in the moving process, the rotating panel 651 can slightly rotate under the action of an acting force, the transportation of the particles with the size is not continuous in a large batch, and the force borne by the rotating panel 651 is not constant, so that the rotating panel 651 can react with the particles to separate part of agglomerated particles, meanwhile, the agglomerated particles can be blocked by the small friction block 66 to be in a bumpy state in the transportation process, the agglomerated particles can be conveniently separated, and for part of the particles which are firmly bonded, part of the particles can still be in the agglomeration state, and further, the output end of the motor II 67 is installed on the material conveying frame 61, the output end of the motor II 67 penetrates through the inner wall of the material conveying frame 61 and extends into the material conveying frame, wherein the output end of the motor II 67 is provided with the connecting column 68, and the driving column 69 is installed on the connecting column 68, a plurality of separation panels 60 are installed on the driving column 69, a plurality of convex blocks 601 are fixedly installed inside the separation area 63, a plurality of discharge chutes 602 are arranged at the connection part of the separation area 63 and the sieving area 64, so that when the agglomerated particles are transported to the separation panel 60, the motor two 67 is driven to make the connecting column 68 drive the driving column 69 to synchronously move, so that the particles on the separation panel 60 synchronously move along with the separation panel 60, the particles move towards the convex blocks 601 under the action of centrifugal force, the agglomerated particles or part of the particles with larger size directly impact the convex blocks 601 to be crushed and fall into the discharge chutes 602 to enter the sieving area 64, a separation filter net 641 is installed at the sieving area 64 in the scheme, a conveying belt 681 is fixedly installed on the connecting column 68, a fixing column 682 is connected to the end part of the conveying belt 681, the fixing column 682 is located inside the separation area 63, wherein a cam 683 is parallelly installed on the fixing column 682, so that the convex part of the cam 683 is acted on the separation filter net to slightly deform (shake) in the rotating process along with the fixing column 641 to avoid the condition that the separation filter net is slightly deformed (the separation filter net 682, and the stainless steel wire forming the separation filter net is blocked material;

specifically, when the medium-sized particles (smaller than the large-sized particles and larger than the qualified particles) in the spin-vibration sieve body 4 enter the feeding area 62 and act on the rotating panel 651, the number input of the particles of the type mentioned above is not stable, and the force acting on the rotating panel 651 is not fixed, so that the rotating panel 651 will react with the particles to make the particles contact with the inner wall of the feeding area 62, and further separate part of the agglomerated particles with weak adhesive force, and at the same time, the small friction blocks 66 will block the agglomerated particles to make the transportation in a bumpy state, further assist the separation of the particles of the type, and part of the particles with strong adhesive force and the particles with large size will move to the separation panel 60, and the motor two 67 will drive the connecting column 68 to rotate, so that the driving column 69 will impact the particles to the bumps 601 through the separation panel 60 to be crushed, the particles are conveyed to the sieving area 64 along the discharge chute 602, the motor two 67 drives the connecting column 68, and simultaneously, the fixing column 682 synchronously rotates through the conveyor belt 681, so that the convex block 601 on the fixing column 682 rotates, the convex part of the convex block 601 acts on the separation filter net 641 to prevent the blockage of the separation filter net 641, after the particle agglomeration with the size is processed, the formed small-sized particles fall into the conveying channel along the separation filter net 641, and further, the purpose of grinding the particles in the conveying process is realized, meanwhile, if part of the larger-sized particles are not processed, the particles in the channel pass through the separation filter net 641 and are output along another channel, and the worker can add the particles in the channel into a grinder for grinding the large-sized particles, through the structural design of the scheme, on one hand, the condition of incomplete screening can be avoided, on the other hand, in the transportation process, the particles slightly larger than the qualified size are ground, and the purpose of reducing the workload of the grinding machine is achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims (5)

1. The utility model provides a screening plant is used in chlorinated polyethylene production, include support body (1), set up in storage feed cylinder (2) on support body (1) with set up in conveying mechanism (3) on support body (1), be provided with on support body (1) and be used for carrying out the sieve body (4) that shakes soon of screening work to chlorinated polyethylene particle, wherein the business turn over material mouth at conveying mechanism (3) both ends be connected its characterized in that with storage feed cylinder (2) discharge gate and sieve body (4) feed inlet that shakes soon respectively: be provided with a plurality of transport material mouths (42) on sieve body (4) shakes soon, still include:

the adjusting component (5) is arranged on the conveying mechanism (3) and is used for controlling the conveying amount of the chlorinated polyethylene particles;

the screening component (6) is arranged on the bracket body (1) and is used for reprocessing the chlorinated polyethylene particles with the agglomeration condition, and a feeding port of the screening component (6) is connected with one conveying port (42) on the rotary vibrating screen body (4);

the adjusting assembly (5) comprises an adjusting control plate (51) arranged inside the conveying mechanism (3), a rotating shaft (52) which is used for being rotatably connected with the inner wall of the conveying mechanism (3) is arranged on the adjusting control plate (51), the rotating shaft (52) penetrates through the inner wall of the conveying mechanism (3) and extends to the outside, an arc-shaped groove (53) which is used for being slidably connected with the adjusting control plate (51) is formed in the inner wall of the conveying mechanism (3), a first motor (54) is installed on the conveying mechanism (3), chain wheels (55) are arranged at the output end of the first motor (54) and one end of the rotating shaft (52) extending to the outside of the conveying mechanism (3), and the chain wheels (55) are connected through chain transmission;

the screening component (6) comprises a material conveying frame (61) arranged on the bracket body (1), the material conveying frame (61) is composed of a material feeding area (62), a separating area (63) and a screening area (64), wherein the inner wall of the material feeding area (62) is provided with an acting piece (65) in parallel, the acting piece (65) comprises a rotating panel (651) arranged on the inner wall of the material feeding area (62), the rotating panel (651) is rotatably connected with the inner wall of the material feeding area (62), the inner wall of the rotating panel (651) in the material feeding area (62) at the opposite side is provided with a plurality of small friction blocks (66), the material conveying frame (61) is provided with a second motor (67), the output end of the second motor (67) penetrates through the inner wall of the material conveying frame (61) and extends into the material conveying frame, the output end of the second motor (67) is provided with a connecting column (68), the connecting column (68) is sleeved with a plurality of driving columns (69), the driving columns (69) are upwards provided with a plurality of separating areas (60) at intervals along the circumference, the separating area (63) is provided with a plurality of separating areas (601), and the connecting area (602) is provided with a plurality of separating areas (601).

2. The screening device for chlorinated polyethylene production according to claim 1, wherein: conveying mechanism (3) bottom inner wall is provided with and is used for rather than carrying out cylinder (56) of rotating the connection between them, just cylinder (56) tip runs through conveying mechanism (3) inner wall and extends to the outside, wherein be provided with baffle (57) on cylinder (56), cylinder (56) tip is provided with control lever (58), and conveying mechanism (3) one side is provided with circular recess (59), just circular recess (59) inside is provided with control button (50).

3. The screening device for chlorinated polyethylene production according to claim 2, wherein: the conveying mechanism (3) is internally provided with a cavity (31), the baffle (57) is provided with a magnetic part (571), and the bottom of the conveying mechanism (3) is provided with a magnet (32) which is used for being attracted with the magnetic part (571).

4. The screening device for chlorinated polyethylene production according to claim 1, wherein: and a filtering screen (41) is arranged in the rotary vibrating screen body (4) in parallel.

5. The screening device for chlorinated polyethylene production according to claim 1, wherein: screening region (64) department is provided with separation filter screen (641), just be provided with conveyer belt (681) on spliced pole (68), and be provided with fixed column (682) at conveyer belt (681) tip, fixed column (682) are located inside separation region (63), wherein parallel arrangement has cam (683) on the fixed column (682).

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