Screening device for chlorinated polyethylene production and screening process thereof

Abstract

The invention relates to a screening device for chlorinated polyethylene production and a screening process thereof.The screening device comprises a box body, a screening structure is arranged in the box body and comprises a feeding hopper, the feeding hopper is fixedly installed at the top of the box body, and a first motor is fixedly installed on the left side of the box body; and the inner left wall of the box body is rotationally connected with a rotating rod. According to the screening device for chlorinated polyethylene production and the screening technology of the screening device, through the arranged screening structure, raw materials can be sequentially fed into the box body in batches through the feeding groove in the rotating rod, and the situation that the screening effect is poor due to accumulation and blockage of the raw materials caused by one-time feeding is avoided; and then a second motor is matched with a spring body to drive a first sieve plate and a second sieve plate to move left and right back and forth, and metal impurities in the raw materials are filtered while the raw materials are subjected to secondary sieving, so that the purpose of filtering the metal impurities while ensuring that the sieving quality is qualified is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of chlorinated polyethylene production, in particular to a screening device for chlorinated polyethylene production and a screening process thereof. Background Art

[0002] Chlorinated polyethylene is a polymer material made from high-density polyethylene through a chlorination substitution reaction. It has excellent weather resistance, ozone resistance, chemical resistance and aging resistance. In the production process of chlorinated polyethylene, the use of screening devices is very important. Through the screening device, chlorinated polyethylene particles can be screened and graded to ensure that the product meets the specified size requirements.

[0003] After searching, for example, the Chinese patent announcement number CN118721509A discloses a screening device for the production of chlorinated polyethylene particles. A motor is arranged at the bottom of the central axis, and one end of a thin rod is connected to the output end of the motor. When the thin rod is energized, it rotates counterclockwise, and the thin rod drives the disk seat to move synchronously. The disk seat is linked to the inclined plate to move synchronously. The inclined plate itself has an inclined surface, and the inclined surface of the inclined plate accelerates the falling of particles to prevent them from accumulating on the upper surface of the disk seat. The thin strips form a synchronous swinging effect with the disk seat. The screening leaves and baffles comb the internal particles to prevent more particles from accumulating in one place, which is conducive to spreading the storage space and facilitating the storage of more particles.

[0004] However, the screening equipment for the production of chlorinated polyethylene particles can only screen the raw materials once, and metal debris is often mixed in during the production process of the raw materials, but the device does not have the function of filtering metal impurities. At the same time, the raw materials often carry moisture during the production process, which will cause the raw materials to agglomerate during the screening process. Therefore, a screening device and a screening process for chlorinated polyethylene production are proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a screening device and a screening process for the production of chlorinated polyethylene, which has the advantages of batch and multi-stage filtering and screening of raw materials, and a drying function to prevent agglomeration, thereby solving the problem that the structure of the existing device needs to be optimized.

[0006] To achieve the above object, the present invention provides the following technical solution: a screening device for chlorinated polyethylene production, comprising a box body, a door hinged on the front of the box body, a screening structure arranged inside the box body, and a drying structure arranged inside the box body;

[0007] The screening structure includes a feed funnel, a feed funnel is fixedly installed on the top of the box, a first motor is fixedly installed on the left side of the box, a rotating rod is rotatably connected to the inner left wall of the box, a pipeline rotating joint is fixedly installed on the right side of the rotating rod, a first sieve plate is arranged inside the box, a second sieve plate is arranged inside the box, a movable structure is arranged on the outer surface of the box, and a second motor is fixedly installed on the back side of the movable structure.

[0008] Furthermore, the movable structure includes a control box, the outer surface of the box body is fixedly mounted with the control box, the control box is internally movably connected with a movable plate, the outer surface of the movable plate is fixedly mounted with a first protrusion, the outer surface of the movable plate is fixedly mounted with a U-shaped block, and the outer surface of the movable plate is fixedly mounted with a spring body.

[0009] Furthermore, the drying structure includes a third motor, the third motor is fixedly installed on the inner bottom wall of the box, a stirring rod is rotatably connected to the inside of the box, an annular groove is opened inside the box, a filter is fixedly installed inside the box, a heating box is fixedly installed inside the box, an electric heating rod is fixedly installed on the inner top of the heating box, and a fan is fixedly installed inside the box.

[0010] Furthermore, the bottom of the feed funnel passes through the top of the box and extends to the interior of the box, the left side of the rotating rod passes through the inner left wall of the box, and is fixedly connected to the output end of the first motor, four feeding troughs are provided inside the rotating rod, and a number of air outlets are provided inside each of the feeding troughs, and a blocking net is provided inside each of the air outlets, and the right side of the pipe rotating joint is fixedly connected to the inner right wall of the box.

[0011] Furthermore, the material of the first screen plate is magnet, and control boxes are fixedly installed on the left and right sides of the box body, and four guide rods are fixedly installed inside each of the control boxes, and the outer surfaces of the eight guide rods are respectively movably connected with two movable plates, and four U-shaped blocks are respectively fixedly installed on the opposite sides of the two movable plates.

[0012] Furthermore, the interiors of the four U-shaped blocks are slidingly connected to the outer surfaces of the first sieve plate and the second sieve plate respectively, a first protrusion is fixedly installed on the left side of one of the movable plates, the right side of another movable plate is fixedly connected to the inner right wall of another control box through three spring bodies, the output end of the second motor is rotatably connected to the inner front wall of one of the control boxes, and a second protrusion is fixedly installed on the output end of the second motor.

[0013] Furthermore, the bottom of the stirring rod is fixedly connected to the output end of the third motor, there are two filters, an exhaust duct is fixedly installed on the front of the fan, the left side of the exhaust duct extends to the inside of the heating box, and an air supply duct is fixedly installed on the right side of the fan, and the right side of the air supply duct extends to the outside of the box.

[0014] Furthermore, two diverter pipes are fixedly installed on the outer surface of the air supply pipe, wherein the left side of one of the diverter pipes extends to the inside of the annular groove, and the left side of the other diverter pipe is fixedly connected to the right side of the pipeline rotary joint.

[0015] A screening process of a screening device for producing chlorinated polyethylene, the screening process is as follows:

[0016] 1) Put the chlorinated polyethylene raw material into the feeding funnel, then turn on the first motor to drive the rotating rod to rotate, and the raw material in the feeding funnel is fed into the box body in batches through the feeding trough through the rotation of the rotating rod;

[0017] 2) Turn on the second motor to drive the second convex block to rotate, and cooperate with the first convex block to drive the moving plate and the U-shaped block to move, thereby driving the first screen plate and the second screen plate to move at the same time, and squeezing the spring body at the same time. When the two convex blocks are separated, they can be driven to move again under the action of the spring body, thereby screening the raw materials twice and separating the metal impurities in the raw materials;

[0018] 3) After screening, qualified raw materials will enter the bottom of the box, and at the same time, the drying structure will be used to generate hot air, which will be sent to the inside of the rotating rod and the annular groove in turn through the fan to separate the moisture in the raw materials and avoid the agglomeration of raw materials;

[0019] 4) After the screening and drying are completed, the box door can be opened to take out the screened and dried raw materials and the first and second sieve plates for subsequent processing.

[0020] Beneficial Effects

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] 1. The screening device and screening process for the production of chlorinated polyethylene can use the feeding trough inside the rotating rod to feed the raw materials into the interior of the box in batches through the screening structure, so as to avoid excessive feeding at one time, resulting in accumulation and blockage of raw materials and poor screening effect. Then, the first screen plate and the second screen plate are driven to move back and forth and left and right by the second motor in cooperation with the spring body, so that the raw materials are screened for the second time and the metal impurities in the raw materials are filtered, thereby achieving the purpose of filtering the metal impurities while ensuring the screening quality is qualified.

[0023] 2. The screening device and screening process for the production of chlorinated polyethylene, through the setting of the drying structure, produces hot air inside the heating box through the electric heating rod, and sends it to the inside of the pipeline rotary joint and the annular groove respectively through the fan. The hot air inside the pipeline rotary joint will enter the rotating rod and be sent out by the air outlet to perform preliminary drying on the raw materials. The hot air inside the annular groove will enter the interior of the box through the filter screen, and then cooperate with the third motor and the stirring rod to stir and dry the raw materials, thereby preventing the raw materials from agglomerating during the screening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a partial front three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the local control box of the present invention;

[0026] Figure 3 It is a schematic diagram of the front structure of the present invention;

[0027] Figure 4 It is a front cross-sectional structural schematic diagram of the present invention;

[0028] Figure 5 It is a schematic diagram of a partial side cross-sectional structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the top view and cross-section structure of the local control box of the present invention.

[0030] In the figure: 1. box body; 2. box door; 3. screening structure; 301. feeding funnel; 302. first motor; 303. rotating rod; 304. pipeline rotating joint; 305. first sieve plate; 306. second sieve plate; 307. movable structure; 3071. control box; 3072. moving plate; 3073. first protrusion; 3074. U-shaped block; 3075. spring body; 308. second motor; 4. drying structure; 401. third motor; 402. stirring rod; 403. annular groove; 404. filter; 405. heating box; 406. electric heating rod; 407. fan. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-6A screening device for chlorinated polyethylene production includes a box body 1, a box door 2 is hinged on the front of the box body 1, a screening structure 3 is arranged inside the box body 1, and a drying structure 4 is arranged inside the box body 1;

[0033] The screening structure 3 includes a feed hopper 301, a feed funnel 301 is fixedly installed on the top of the box body 1, a first motor 302 is fixedly installed on the left side of the box body 1, a rotating rod 303 is rotatably connected to the inner left wall of the box body 1, a pipe rotating joint 304 is fixedly installed on the right side of the rotating rod 303, a first sieve plate 305 is arranged inside the box body 1, a second sieve plate 306 is arranged inside the box body 1, a movable structure 307 is arranged on the outer surface of the box body 1, and a second motor 308 is fixedly installed on the back of the movable structure 307.

[0034] Furthermore, the movable structure 307 includes a control box 3071, the control box 3071 is fixedly installed on the outer surface of the box body 1, the control box 3071 is internally movably connected with a movable plate 3072, the outer surface of the movable plate 3072 is fixedly installed with a first protrusion 3073, the outer surface of the movable plate 3072 is fixedly installed with a U-shaped block 3074, and the outer surface of the movable plate 3072 is fixedly installed with a spring body 3075.

[0035] Furthermore, the drying structure 4 includes a third motor 401, the third motor 401 is fixedly installed on the inner bottom wall of the box body 1, a stirring rod 402 is rotatably connected to the inside of the box body 1, an annular groove 403 is opened inside the box body 1, a filter screen 404 is fixedly installed inside the box body 1, a heating box 405 is fixedly installed inside the box body 1, an electric heating rod 406 is fixedly installed on the inner top of the heating box 405, and a fan 407 is fixedly installed inside the box body 1.

[0036] Specifically, Figure 4As shown, the raw materials are fed into the feed hopper 301, and then the first motor 302 is turned on to drive the rotating rod 303 to rotate. During the rotation of the rotating rod 303, the raw materials will enter the inside of the feeding trough in batches, and then enter the inside of the box body 1. This design prevents the raw materials from accumulating on the sieve plate, causing the sieve plate to be blocked or uneven screening. Then, turning on the second motor 308 will drive the second protrusion to rotate. When the second protrusion fits with the first protrusion 3073, the first protrusion 3073 and the moving plate 3072 will move, and the moving plate 3073 will be moved. The movement of 072 will drive the U-shaped block 3074 to move, thereby driving the first screen plate 305 and the second screen plate 306 to move, and squeeze the spring body 3075. When the first protrusion 3073 and the second protrusion are separated due to rotation, under the action of the spring body 3075, the first screen plate 305 and the second screen plate 306 are driven to move to the left, and the back and forth movement is repeated in sequence, thereby screening the raw materials. Because the material of the first screen plate 305 is a magnet, the metal impurities contained in the raw materials will be filtered during the screening process, which helps to improve the quality of screening.

[0037] Specifically, Figure 4 As shown, by turning on the electric heating rod 406, hot air can be generated inside the heating box 405. Then, by turning on the fan 407, the generated hot air can be drawn out of the heating box 405 and sent out through the air supply pipe. Because there are two branch pipes connected to the outer surface of the air supply pipe, the hot air will enter the pipeline rotary joint 304, the rotating rod 303 and the annular groove 403 through the branch pipes respectively. The hot air entering the rotating rod 303 will enter the interior of the feeding trough through the air outlet, and the raw materials inside the feeding trough will be preliminarily dried. At the same time, the blocking net is used to prevent the raw materials from entering the air outlet and causing the air outlet to be blocked. Then, the hot air entering the annular groove 403 will pass through the filter net 404 into the interior of the box 1. At the same time, turning on the third motor 401 can drive the stirring rod 402 to stir the screened raw materials, and the raw materials can be dried with the hot air to avoid agglomeration of the raw materials.

[0038] Specifically, Figure 1As shown, a control panel is provided on the front of the control box 3071 on the left side. The control panel is electrically connected to the powered devices in the device. The control panel sends control instructions to each component through control signal lines. These signal lines can be analog signal lines such as 4-20mA current signals, digital signal lines such as RS485 communication interfaces or simple switch signal lines. The control signals sent by the control panel are transmitted to the control units of each component through the signal lines. The start and stop operations of each component can be achieved through the buttons or touch screen interface on the control panel. After receiving the start instruction, the controller will send corresponding control signals to each component to start them. When receiving the stop instruction, it will send a stop signal to stop each component. The working parameters of each component are set on the control panel interface. These parameter settings will be converted into corresponding control signals and sent to the control units of each component, thereby realizing precise adjustment of the working status of the component. The control panel has the function of monitoring the operating status of each component and can display the working parameters and status information of each component in real time.

[0039] When implementing, follow these steps:

[0040] 1) First, the chlorinated polyethylene raw material is put into the feeding funnel 301, and then the first motor 302 is turned on to drive the rotating rod 303 to rotate, and the raw material in the feeding funnel 301 is fed into the interior of the box 1 in batches through the feeding trough through the rotation of the rotating rod 303;

[0041] 2) Then turn on the second motor 308 to drive the second protrusion to rotate, and cooperate with the first protrusion 3073 to drive the moving plate 3072 and the U-shaped block 3074 to move, thereby driving the first screen plate 305 and the second screen plate 306 to move at the same time, and squeezing the spring body 3075 at the same time. When the two protrusions are separated, they can be driven to move again under the action of the spring body 3075, so as to screen the raw materials twice and separate the metal impurities in the raw materials;

[0042] 3) After screening, the qualified raw materials will enter the bottom of the box 1, and at the same time, the drying structure 4 will be used to generate hot air, which will be sent to the rotating rod 303 and the inside of the annular groove 403 in sequence through the fan 407 to separate the moisture in the raw materials and avoid the agglomeration of the raw materials;

[0043] 4) After the final screening and drying are completed, the box door 2 is opened to take out the screened and dried raw materials and the first sieve plate 305 and the second sieve plate 306 for subsequent processing.

[0044] In summary, the screening device and screening process for the production of chlorinated polyethylene can use the feeding trough inside the rotating rod 303 to feed the raw materials into the interior of the box 1 in batches through the screening structure 3, so as to avoid excessive feeding at one time, resulting in the accumulation of raw materials and blockage, resulting in poor screening effect. Then, the second motor 308 cooperates with the spring body 3075 to drive the first screen plate 305 and the second screen plate 306 to move back and forth, and the raw materials are screened for the second time, while filtering the metal impurities in the raw materials, so as to ensure the screening quality and filter the metal impurities. For the purpose of filtering, the drying structure 4 is set up, and hot air is produced inside the heating box 405 through the electric heating rod 406, and is respectively sent into the pipe rotary joint 304 and the annular groove 403 through the fan 407. The hot air inside the pipe rotary joint 304 will enter the rotating rod 303 and be sent out by the air outlet to preliminarily dry the raw materials. The hot air inside the annular groove 403 will enter the interior of the box 1 through the filter net 404, and then cooperate with the third motor 401 and the stirring rod 402 to stir and dry the raw materials, thereby preventing the raw materials from agglomerating during the screening process.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening device for chlorinated polyethylene production, comprising a housing (1), characterized in that: The front of the box (1) is hinged with a box door (2), the interior of the box (1) is provided with a screening structure (3), and the interior of the box (1) is provided with a drying structure (4); The screening structure (3) comprises a feeding funnel (301), the feeding funnel (301) is fixedly mounted on the top of the box body (1), a first motor (302) is fixedly mounted on the left side of the box body (1), a rotating rod (303) is rotatably connected to the inner left wall of the box body (1), a pipeline rotating joint (304) is fixedly mounted on the right side of the rotating rod (303), a first sieve plate (305) is arranged inside the box body (1), a second sieve plate (306) is arranged inside the box body (1), a movable structure (307) is arranged on the outer surface of the box body (1), and a second motor (308) is fixedly mounted on the back side of the movable structure (307).

2. A screening device for chlorinated polyethylene production according to claim 1, characterized in that: The movable structure (307) comprises a control box (3071), the control box (3071) is fixedly mounted on the outer surface of the box body (1), a movable plate (3072) is movably connected inside the control box (3071), a first protrusion (3073) is fixedly mounted on the outer surface of the movable plate (3072), a U-shaped block (3074) is fixedly mounted on the outer surface of the movable plate (3072), and a spring body (3075) is fixedly mounted on the outer surface of the movable plate (3072).

3. A screening device for chlorinated polyethylene production according to claim 1, characterized in that: The drying structure (4) comprises a third motor (401), the inner bottom wall of the box body (1) is fixedly mounted with the third motor (401), the interior of the box body (1) is rotatably connected with a stirring rod (402), the interior of the box body (1) is provided with an annular groove (403), the interior of the box body (1) is fixedly mounted with a filter screen (404), the interior of the box body (1) is fixedly mounted with a heating box (405), the inner top of the heating box (405) is fixedly mounted with an electric heating rod (406), and the interior of the box body (1) is fixedly mounted with a fan (407).

4. A screening device for chlorinated polyethylene production according to claim 1, characterized in that: The bottom of the feed funnel (301) passes through the top of the box (1) and extends to the interior of the box (1); the left side of the rotating rod (303) passes through the inner left wall of the box (1) and is fixedly connected to the output end of the first motor (302); four feeding troughs are provided inside the rotating rod (303); a plurality of air outlets are provided inside each of the feeding troughs; a screen is provided inside each of the air outlets; and the right side of the pipe rotating joint (304) is fixedly connected to the inner right wall of the box (1).

5. A screening device for chlorinated polyethylene production according to claim 2, characterized in that: The material of the first sieve plate (305) is a magnet. Control boxes (3071) are fixedly installed on the left and right sides of the box body (1). Four guide rods are fixedly installed inside each of the control boxes (3071). Two movable plates (3072) are movably connected to the outer surfaces of the eight guide rods, and four U-shaped blocks (3074) are fixedly installed on the opposite sides of the two movable plates (3072).

6. A screening device for chlorinated polyethylene production according to claim 2, characterized in that: The interiors of the four U-shaped blocks (3074) are respectively slidably connected to the outer surfaces of the first sieve plate (305) and the outer surfaces of the second sieve plate (306); a first protrusion (3073) is fixedly installed on the left side of one of the movable plates (3072); the right side of another movable plate (3072) is fixedly connected to the inner right wall of another control box (3071) via three spring bodies (3075); the output end of the second motor (308) is rotatably connected to the inner front wall of one of the control boxes (3071); and a second protrusion is fixedly installed on the output end of the second motor (308).

7. A screening device for chlorinated polyethylene production according to claim 3, characterized in that: The bottom of the stirring rod (402) is fixedly connected to the output end of the third motor (401), the number of the filter screens (404) is two, an exhaust pipe is fixedly installed on the front of the fan (407), the left side of the exhaust pipe extends to the inside of the heating box (405), and an air supply pipe is fixedly installed on the right side of the fan (407), and the right side of the air supply pipe extends to the outside of the box (1).

8. A screening device for chlorinated polyethylene production according to claim 7, characterized in that: Two shunt pipes are fixedly mounted on the outer surface of the air supply pipe, wherein the left side of one of the shunt pipes extends into the interior of the annular groove (403), and the left side of the other shunt pipe is fixedly connected to the right side of the pipeline rotary joint (304).

9. A screening process for a screening device for producing chlorinated polyethylene, comprising the screening process for a screening device for producing chlorinated polyethylene according to any one of claims 1 to 8, characterized in that: The screening process is as follows: 1) putting chlorinated polyethylene raw material into a feeding hopper (301), then turning on a first motor (302) to drive a rotating rod (303) to rotate, and the raw material in the feeding hopper (301) is fed into the interior of a box (1) in batches through a feeding trough by the rotation of the rotating rod (303); 2) Turning on the second motor (308) to drive the second protrusion to rotate, and cooperating with the first protrusion (3073) to drive the movable plate (3072) and the U-shaped block (3074) to move, thereby driving the first sieve plate (305) and the second sieve plate (306) to move at the same time, and squeezing the spring body (3075). When the two protrusions are separated, they can be driven to move again under the action of the spring body (3075), thereby screening the raw materials twice and separating the metal impurities in the raw materials; 3) After screening, the qualified raw materials will enter the bottom of the box (1), and at the same time, the drying structure (4) will be set to generate hot air, and then sent into the rotating rod (303) and the annular groove (403) in sequence through the fan (407), so as to separate the moisture in the raw materials and avoid the agglomeration of the raw materials; 4) After the screening and drying are completed, the box door (2) is opened to take out the screened and dried raw materials and the first screen plate (305) and the second screen plate (306) for subsequent processing.

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