A flame retardant particle size classification and screening device and screening method

Abstract

The present invention relates to the technical field of flame retardant screening, and in particular to a flame retardant particle size classification and screening device and screening method. The device includes a screening cylinder, a screening and grinding component 1, a collection cover, a screening and grinding component 2, a dust cover, a dust collection component and a vibrator. The present invention sets a collection cover, a screening and grinding component 2, and a screening and grinding component 1 to cooperate, and the annular screening plate shakes in the horizontal direction to perform a screening, and the annular screening plate moves in the vertical direction to guide out the unscreened flame retardant. The grinding piece cooperates with the screening and grinding component 1, and rotates relative to each other through its double-layer structure, and adjusts the grinding area / screening area relative to the screening and grinding port, and performs the screening / grinding function switching to achieve the purpose of secondary screening after grinding. A coherent, efficient and comprehensive classification and screening of flame retardant particle sizes is achieved, the screening categories are rich, the discharging position is flexible, and the grinding process during the screening process also ensures the thoroughness of the screening, saving the time of the secondary treatment.

Description

Technical Field

[0001] The invention relates to the technical field of flame retardant screening, and in particular to a flame retardant particle size classification and screening device and a screening method. Background Art

[0002] As a functional material, polymer materials are widely used in various industries in my country, especially in the construction industry. Once polymer materials are heated, they will decompose into flammable substances. When the concentration of this flammable substance reaches a certain level, it will burn when it encounters an appropriate temperature, causing huge losses to the company. Therefore, the method of using flame retardants in polymer materials to achieve flame retardancy is currently the most widely used flame retardant method in my country. There are many types of flame retardants, which are divided into additive flame retardants and reactive flame retardants according to the method of use. The process flow includes raw material preparation, mixing reaction, temperature reaction, separation and drying. After separation and drying, it needs to be screened to ensure the quality of the product.

[0003] A Chinese patent document with authorization announcement number CN215964677U discloses an ultrasonic automatic screening device for flame retardants, including a base, multiple springs, a housing, a screening net, an ultrasonic generator, an ultrasonic transducer, two feed ports and two discharge ports, wherein two storage structures are connected to the two feed ports.

[0004] The above-mentioned flame retardant screening device has the following shortcomings: 1. It can only screen flame retardants, and cannot process unscreened flame retardants. It is necessary to discharge the unscreened flame retardants from the device and then grind them, which is often time-consuming and labor-intensive. 2. It can only perform a single screening, and the screening method is single, resulting in limited screening effect on flame retardants. 3. It cannot screen out dust and debris mixed in the flame retardant, which easily causes the flame retardant particles to mix with dust after screening, resulting in poor uniformity. Summary of the invention

[0005] In view of the problems existing in the background technology, a flame retardant particle size classification and screening device and screening method are proposed. The present invention sets a collection cover, a screening and grinding component 2, and a screening and grinding component 1 to cooperate, so as to achieve a coherent, efficient and comprehensive classification and screening of flame retardant particles, with rich screening categories and flexible material discharging positions. The grinding process during the screening process also ensures thorough screening, saving the time of secondary processing.

[0006] The present invention provides a flame retardant particle size classification and screening device, comprising:

[0007] The screening cylinder has a feed pipe on the top, a discharge pipe 1 and a discharge pipe 2 on the side wall, and a discharge pipe 3 on the bottom;

[0008] The screening and grinding component 1 is located in the screening cylinder, and its internal space is divided into an upper screening chamber connected to the discharge pipe 1 and a lower screening chamber connected to the discharge pipe 2. The screening and grinding component 1 is a double-layer structure, the upper layer is fixed, and a screening and grinding port is set, and the lower layer is set with a grinding area and a screening area. The grinding area / screening area is adjusted to be opposite to the screening and grinding port by rotation to realize the screening / grinding function;

[0009] A material collecting cover is located between the screening and grinding component 1 and the feed pipe;

[0010] The second screening and grinding component is provided with a screening end located in the aggregate cover and a grinding end located outside the aggregate cover. The screening end is shaken on a horizontal plane for screening. The unscreened flame retardant is guided out of the aggregate cover and falls on the upper layer of the first screening and grinding component by moving the screening end in a vertical direction. The flame retardant guided out of the aggregate cover is ground by the grinding end cooperating with the upper layer of the first screening and grinding component. The screened flame retardant is guided out through a discharge pipe three penetrating the first screening and grinding component.

[0011] A dust hood is located between the screening and grinding component one and the discharge pipe three, and collects the flame retardant dust passing through the screening and grinding component two;

[0012] The dust collecting assembly is located outside the screening cylinder and is provided with a first dust collecting end extending into the dust cover and a second dust collecting end extending into the feed pipe;

[0013] And vibrators.

[0014] Preferably, the upper layer of the screening and grinding component is a fixed disk, the center of which is covered by a collecting cover and is provided with a discharge valve connected to a discharge pipe three; the screening and grinding port is arranged on the outer periphery of the fixed disk; the lower layer of the screening and grinding component is a rotating ring which is coaxial with the fixed disk and rotatably connected; a grinding plate is arranged on the rotating ring corresponding to the grinding area, and a screening plate is arranged corresponding to the screening area; a clearing piece is arranged on the fixed disk for acting on the screening plate by jetting downward; the clearing piece includes an air outlet seat with an air pump, and a jet head located at the bottom of the air outlet seat and connected to the air pump.

[0015] Preferably, multiple groups of discharge valves 1 are provided; the discharge pipe 3 includes discharge branch pipes corresponding to the discharge valves 1 to 1, a discharge main pipe connected to all the discharge branch pipes and extending out from the bottom of the screening cylinder, and a negative pressure pump connected to the discharge main pipe.

[0016] Preferably, the screening and grinding assembly 2 includes a grinding piece; the grinding piece includes a rotating rod that can rotate and extend out of the collecting cover, a mounting frame located at the top of the rotating rod and spanning the collecting cover, and a grinder located on the mounting frame; the grinder includes a grinding end facing the outer periphery of the fixed disk; the grinding end is connected to the end of the mounting frame through a telescopic end.

[0017] Preferably, the screening and grinding component two also includes an outer soft sleeve connected to the upper cover opening of the collecting cover, an inner soft sleeve connected to the mounting seat one and forming an annular screening chamber with the outer soft sleeve, and an annular screening plate sealing the bottom of the annular screening chamber; the upper end of the annular screening chamber is connected to the feed pipe, and the lower end is connected to the through groove on the annular screening plate; the mounting seat one is rotatably arranged on the mounting frame, and is penetrated by the upper end of the rotating rod; the annular screening plate is the screening end, which is driven to rise and fall by the driving member one, and the screening plate two is arranged in the through groove, and the inner ring is penetrated by the lower end of the rotating rod; the rotating rod is also provided with a rotating member acting on the annular screening plate, which pushes the annular screening plate to shake by applying local force to the inner ring wall of the annular screening plate.

[0018] Preferably, the rotating member comprises a second mounting seat sleeved on the rotating rod; an eccentric wheel is arranged on the outer periphery of the second mounting seat for striking the annular screening plate by rotation.

[0019] Preferably, the second screen plate is rotatably arranged at the upper notch of the mounting groove by means of a second driver; the lower notch of the mounting groove is provided with a second dredging member for acting on the second screen plate by jetting upward. The second dredging member comprises a second air outlet seat with a second air pump and arranged below the second screen plate, and a second jet head located on the second air outlet seat and connected to the second air pump.

[0020] Preferably, the dust collection assembly includes a collection cylinder with a dust interception layer; a dust suction pump 1 corresponding to the dust collection end 1 and a dust suction pump 2 corresponding to the dust collection end 2 are arranged on the collection cylinder; the dust suction pump 1 is connected to the dust hood; and the dust suction pump 2 is connected to the feed pipe.

[0021] Preferably, a dust filter cover is arranged in the feed pipe; and the dust suction end of the second dust suction pump extends into the dust filter cover through the pipeline.

[0022] The present invention further proposes a flame retardant particle size classification and screening method, using the above-mentioned flame retardant particle size classification and screening device, the steps are as follows:

[0023] S1, the flame retardant enters the feed pipe, and the dust collection end of the dust collection assembly collects the dust;

[0024] S2, the flame retardant with dust removed enters the collecting cover and falls on the screening end of the screening and grinding component 2, and is screened once by shaking the screening end on a horizontal plane;

[0025] S3, the screened flame retardant is discharged through the discharge pipe 3; the unscreened flame retardant moves in the vertical direction through the screening end and is discharged from the collecting cover and falls on the upper layer of the screening and grinding component 1;

[0026] S4, the staff chooses to discharge directly from the discharge pipe or further grind and screen;

[0027] S5, when further grinding and screening, the lower layer of the screening and grinding assembly rotates, and the grinding area is opposite to the screening and grinding port; the grinding end of the screening and grinding assembly 2 cooperates with the upper layer of the screening and grinding assembly 1 to grind the flame retardant exported from the aggregate cover;

[0028] S6, the lower layer of the screening and grinding assembly rotates, the screening area is opposite to the screening and grinding port, and the screened flame retardant enters the lower screening chamber to complete the secondary screening;

[0029] S7, the flame retardant falls on the dust hood, and the newly generated flame retardant dust is collected by the dust collecting end of the dust collecting component;

[0030] S8. The flame retardant leaves the device from discharge pipe 2.

[0031] Compared with the prior art, the present invention has the following beneficial technical effects: a collection cover, a screening and grinding component 2 and a screening and grinding component 1 are arranged to cooperate, and a screening is performed by shaking the annular screening plate in the collection cover in the horizontal direction, and the unscreened flame retardant is dropped on the upper layer of the screening and grinding component 1 by moving the annular screening plate in the collection cover in the vertical direction, and the grinding piece cooperates with the upper layer of the screening and grinding component 1, and the double-layer structure of the screening and grinding component 1 rotates relative to each other, and the grinding area / screening area is adjusted relative to the screening and grinding port, and the screening / grinding function is switched to achieve the purpose of secondary screening after grinding. The coordination of the collection cover, the screening and grinding component 2 and the screening and grinding component 1 realizes a coherent, efficient and comprehensive classification and screening of the flame retardant particle size, with rich screening categories and flexible discharging positions. The grinding process during the screening process also ensures thorough screening, saving the time of secondary processing. In addition, the dust collection component further ensures the uniformity of the particle size of the screened flame retardant by collecting dust in the dust cover and the feed pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the flame retardant particle size classification and screening device in the present invention;

[0033] Figure 2 A cross-sectional view of the flame retardant particle size classification and screening device of the present invention;

[0034] Figure 3 It is a secondary cross-sectional view of the flame retardant particle size classification and screening device of the present invention;

[0035] Figure 4 It is a schematic diagram of the disassembly of the screening and grinding component 1 in the present invention;

[0036] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0037] Figure 6 It is a schematic diagram of the structure of the grinding piece in the present invention;

[0038] Figure 7 This is a partial structural breakdown diagram of the screening and grinding component 2 of the present invention;

[0039] Figure 8 It is a partial cross-sectional view of the annular screen plate in the present invention;

[0040] Fig. 9 for Figure 3 Enlarged view of point B in the middle;

[0041] Fig.10 for Figure 8 Enlarged view of point C in the middle;

[0042] Fig.11 It is a schematic diagram of the structure of the dust collection assembly in the present invention;

[0043] Fig.12 for Figure 2 Enlarged view of point D in the middle.

[0044] Figure numerals: 1, screening cylinder; 2, screening grinding component 1; 201, rotating ring; 202, fixed plate; 203, screening grinding port; 204, dredging piece 1; 204a, mounting groove; 204b, air outlet seat 1; 204c, jet head 1; 205, grinding plate; 206, screening plate 1; 207, gear 1; 208, gear ring 1; 209, discharge valve 1; 3, collecting cover; 4, screening grinding component 2; 401, grinding piece; 401a, motor 2; 401b, rotating rod; 401c, mounting frame; 401d, cylinder; 401e, grinding head; 402, rotating piece; 402a, mounting seat 2; 402b, eccentric wheel; 403, outer soft Sleeve; 404, inner soft sleeve; 405, annular screening plate; 406, mounting seat one; 407, screening plate two; 408, drive two; 408a, shell; 408b, motor four; 408c, gear two; 409, dredging piece two; 409a, motor five; 409b, air outlet seat two; 409c, jet head two; 410, driving piece one; 5, feed pipe; 501, dust filter cover; 6, discharge pipe three; 601, discharge main pipe; 602, discharge branch pipe; 603, negative pressure pump; 7, dust cover; 8, dust collection assembly; 801, collection barrel; 802, dust pump one; 803, dust pump two; 804, pipeline; 9, discharge pipe one; 10, discharge pipe two. DETAILED DESCRIPTION

[0045] like Figure 1-Figure 3 As shown, a flame retardant particle size grading and screening device proposed by the present invention includes a screening cylinder 1, a screening and grinding component 1 2, a collection cover 3, a screening and grinding component 2 4, a dust cover 7, a dust collection component 8 and a vibrator.

[0046] A feed pipe 5 is arranged on the top of the screening cylinder 1, a discharge pipe 1 9 and a discharge pipe 2 10 are arranged on the side wall, and a discharge pipe 3 6 is arranged on the bottom. The screening and grinding assembly 1 2 is located in the screening cylinder 1, and its internal space is divided into an upper screening chamber connected to the discharge pipe 1 9 and a lower screening chamber connected to the discharge pipe 2 10. The screening and grinding assembly 1 2 is a double-layer structure, the upper layer is fixed, and a screening and grinding port 203 is arranged, and a grinding area and a screening area are arranged on the lower layer. The grinding area / screening area is adjusted to be opposite to the screening and grinding port 203 by rotation to realize the screening / grinding function. The collecting cover 3 is located between the screening and grinding assembly 1 2 and the feed pipe 5, the upper end is open and opposite to the feed pipe 5, and the whole is a trumpet-shaped structure with a small upper part and a large lower part, and an inclined surface is arranged on the side wall to facilitate material guiding. The screening and grinding component 24 is provided with a screening end located inside the material collecting cover 3 and a grinding end located outside the material collecting cover 3. The screening is performed by shaking the screening end on a horizontal plane. The unscreened flame retardant is guided out of the material collecting cover 3 and falls on the upper layer of the screening and grinding component 12 by moving the screening end in a vertical direction. The flame retardant guided out of the material collecting cover 3 is ground by cooperating with the grinding end and the upper layer of the screening and grinding component 12. The screened flame retardant is guided out through the discharge pipe 36 penetrating the screening and grinding component 12. The dust cover 7 is located between the screening and grinding component 1 and the discharge pipe 36, with an open upper end connected to the inside of the material collecting cover 3. The whole structure is a trumpet-shaped structure with a small upper part and a large lower part. The side wall is provided with an inclined surface with mesh holes to collect the flame retardant dust of the screening and grinding component 24. The dust collection component 8 is located outside the screening cylinder 1, and is provided with a dust collection end 1 extending into the dust cover 7, and a dust collection end 2 extending into the feed pipe 5. The vibrator is located on the screening and grinding assembly 2, and acts on the aggregate cover 3 and the dust cover 7 simultaneously through contact transmission.

[0047] Embodiment 1, as Figure 4 As shown, the upper layer of the screening and grinding component 2 is a fixed disk 202, the center of which is covered by the collecting cover 3 and is provided with a discharge valve 209 connected to the discharge pipe 36; the screening and grinding port 203 is arranged on the outer periphery of the fixed disk 202; the lower layer of the screening and grinding component 2 is a rotating ring 201 that is coaxial with the fixed disk 202 and rotatably connected; a grinding plate 205 is arranged on the rotating ring 201 corresponding to the grinding area, and a screening plate 206 is arranged corresponding to the screening area.

[0048] like Figure 5 As described, a clearing piece 204 is provided on the fixed disk 202 for acting on the screening plate 206 by jetting downward; the clearing piece 204 includes an air outlet seat 204b with an air pump, and an air jet head 204c located at the bottom of the air outlet seat 204b and connected to the air pump.

[0049] It should be further explained that the air outlet seat 1 204b is located in the mounting groove 204a of the fixed plate 202, and the mounting groove 204a is located at both ends of the screening and grinding port 203; the bottom of the air jet head 1 204c does not extend out of the notch of the mounting groove 204a;

[0050] It needs to be further explained that a gear ring 208 is provided on the inner wall of the rotating ring 201; a motor 1 and a gear 207 connected to the main shaft of the motor 1 are provided on the fixed disk 202; the motor 1 drives the gear 207 to rotate; the gear 207 is meshed; and the gear ring 208 is connected to realize that the rotating ring 201 and the fixed disk 202 are coaxial and rotationally connected.

[0051] By rotating the rotating ring 201, the grinding plate 205 / screening plate 206 is opposite to the screening and grinding port 203, so that the switching of the grinding and screening functions can be realized.

[0052] like Figure 3 As shown, multiple groups of discharge valves 209 are arranged; the discharge pipe 3 6 includes discharge branch pipes 602 corresponding to the discharge valves 209 one by one, a discharge main pipe 601 connecting all the discharge branch pipes 602 and extending out from the bottom of the screening cylinder 1, and a negative pressure pump 603 connected to the discharge main pipe 601.

[0053] Through the action of the negative pressure pump 603, negative pressure is formed in the discharge main pipe 601, and the discharge branch pipe 602 guides the screened flame retardant in the collecting cover 3 out of the device.

[0054] like Figure 6 As shown, the screening and grinding assembly 204 includes a grinding piece 401; the grinding piece 401 includes a motor 201a located in the material collecting cover 3, a rotating rod 401b driven by the motor 201a to rotate and extend out of the material collecting cover 3, a mounting frame 401c located on the top of the rotating rod 401b and spanning the material collecting cover 3, and a grinder located on the mounting frame 401c. The grinder includes a grinding end facing the outer periphery of the fixed disk 202; the grinding end is connected to the end of the mounting frame 401c through a telescopic end.

[0055] It should be further explained that the telescopic end is a cylinder 401d; the height of the grinding end is adjusted by moving the telescopic rod of the cylinder 401d.

[0056] It should be further explained that the grinding end is a grinding head 401e; the flame retardant on the fixed disk 202 is ground by the grinding head 401e as the rotating rod 401b rotates.

[0057] Embodiment 2: Based on the above embodiment, this embodiment discloses other structures of the screening and grinding assembly 2 4. Figure 7-Figure 8As shown, the screening and grinding assembly 2 4 also includes an outer soft sleeve 403 connected to the upper cover opening of the material collecting cover 3, an inner soft sleeve 404 connected to the mounting seat 1 406 and forming an annular screening chamber with the outer soft sleeve 403, and an annular screening plate 405 sealing the bottom of the annular screening chamber. The upper end of the annular screening chamber is connected to the feed pipe 5, and the lower end is connected to the through slot on the annular screening plate 405; the mounting seat 1 406 is rotatably arranged on the mounting frame 401c, and is rotatably penetrated by the upper end of the rotating rod 401b; the annular screening plate 405 is the screening end, which is driven to rise and fall by the driving member 1 410, and the screening plate 2 407 is arranged in the through slot, and the inner ring is rotatably penetrated by the lower end of the rotating rod 401b.

[0058] like Fig. 9 As shown, the driving member 1 410 includes a motor 3 located at the top of the collecting cover 3 and a traction rope wound and unwound by the motor 3; the traction rope is connected to the annular screening plate 405; by winding and unwinding the traction rope, the annular screening plate 405 can be controlled to rise and fall, and the outer soft cover 403 and the inner soft cover 404 are deformed at the same time. When the annular screening plate 405 is pulled to the top, the unscreened flame retardant in the annular screening cavity is discharged.

[0059] like Figure 7-Figure 8 As shown, a rotating member 402 is also provided on the rotating rod 401b to act on the annular screening plate 405, and the annular screening plate 405 is pushed to shake by applying force locally to the inner ring wall of the annular screening plate 405. The rotating member 402 includes a second mounting seat 402a sleeved on the rotating rod 401b; an eccentric wheel 402b is provided on the outer periphery of the second mounting seat 402a to strike the annular screening plate 405 by rotating.

[0060] The eccentric wheel 402b is driven to rotate by the corresponding driving motor. During the rotation process, each rotation point staggers and pushes the inner wall of the annular screening plate 405, so that the annular screening plate 405 shakes synchronously. This shaking can be regular or irregular. When the rotating rod 401b rotates, the variability of the shaking is further increased, and the flame retardant screening is accelerated.

[0061] like Fig.10 As shown, the second screening plate 407 is rotatably arranged at the upper notch of the mounting groove by means of the second driving device 408; the lower notch of the mounting groove is provided with a second clearing member 409 which acts on the second screening plate 407 by jetting upward.

[0062] It should be further explained that the drive 408 includes a shell 408a which is rotated and penetrated by the screen plate 407 and embedded in the annular screen plate 405; one end of the shell 408a extends out of the inner ring of the annular screen plate 405, and enhances the knocking effect by contacting with the rotating eccentric wheel 402b, and the other end extends out of the outer ring of the annular screen plate 405, and is provided with a motor 408b and a gear 408c connected to the main shaft of the motor 408b, and the shell 408a is also provided with a gear ring 408d which is sleeved on the screen plate 407 and meshed with the gear 408c.

[0063] Through the meshing of gear 2 408c and gear ring 2 408d, the screening plate 2 407 can be driven to rotate, thereby realizing rotary screening and accelerating the screening speed.

[0064] It should be further explained that the second clearing member 409 includes a second air outlet seat 409b with an air pump and arranged below the second screening plate 407, and a second nozzle 409c located on the second air outlet seat 409b and connected to the second air pump.

[0065] A motor 5 409a is arranged on the groove wall of the through groove, and the motor 5 409a drives the air outlet seat 2 409b to rotate under the screening plate 2 407, and rotates the jet head 2 409c downward during screening, and rotates the jet head 2 409c upward during dredging, so as to achieve the purpose of protecting the jet head 2 409c. At the same time, the rotation of the screening plate 2 407 can be applied to the dredging process to increase the dredging range.

[0066] Embodiment 3: This embodiment discloses the relevant structure of the dust collection assembly 8. Fig.11 As shown, the dust collection assembly 8 includes a collection cylinder 801 with a dust interception layer; a dust suction pump 1 802 corresponding to the dust collection end 1 and a dust suction pump 2 803 corresponding to the dust collection end 2 are arranged on the collection cylinder 801; the dust suction pump 1 802 is connected to the dust hood 7; the dust suction pump 2 803 is connected to the feed pipe 5.

[0067] The dust suction pump 1 802 collects the dust passing through the dust cover 7. The dust suction pump 2 803 collects the dust in the feed pipe 5. The dust in the flame retardant is screened to ensure the uniformity of its particle size.

[0068] It needs to be further explained that if Fig.12 As shown, a dust filter cover 501 is arranged in the feed pipe 5; the dust suction end of the dust suction pump 803 extends into the dust filter cover 501 through the pipeline 804. The dust filter cover 501 only allows dust to pass through, thereby avoiding the blockage of the pipeline 804.

[0069] Embodiment 4: This embodiment discloses a flame retardant particle size classification and screening method, using a flame retardant particle size classification and screening device described in the above embodiment, the steps are as follows:

[0070] S1, the flame retardant enters the feed pipe 5, and the dust collecting end of the dust collecting assembly 8 collects the dust;

[0071] S2, the flame retardant with dust removed enters the collecting cover 3 and falls into the annular screening chamber; the eccentric wheel 402b rotates alternately, pushing the annular screening plate 405 to shake synchronously; part of the flame retardant is screened and enters the bottom of the collecting cover 3, and part of the flame retardant is not screened and remains on the annular screening plate 405, completing one screening;

[0072] S3, the screened flame retardant is discharged through the discharge pipe 36; the unscreened flame retardant is drawn by the traction rope, and when the annular screening plate 405 is pulled to the top, the unscreened flame retardant in the annular screening chamber is discharged and falls on the upper layer of the screening and grinding assembly 2;

[0073] S4, the staff chooses to discharge directly from the discharge pipe 9 or further grind and screen;

[0074] S5. When further grinding and screening, the rotating ring 201 is rotated until the grinding plate 205 is opposite to the screening grinding port 203. At the same time, the cylinder 401d adjusts the height of the grinding end, and the grinding head 401e grinds the flame retardant on the fixed plate 202 as the rotating rod 401b rotates;

[0075] S6. After the grinding is completed, the rotating ring 201 is rotated until the screening plate 206 is opposite to the screening and grinding port 203. The unscreened flame retardant can continue to be ground or directly discharged, and the screened flame retardant enters the lower screening chamber to complete the secondary screening;

[0076] S7, the flame retardant falls on the dust cover 7, and the newly generated flame retardant dust passes through the dust cover 7 and is collected by the dust collecting end 1 of the dust collecting assembly 8;

[0077] S8. The flame retardant leaves the device from the discharge pipe 10.

[0078] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A flame retardant particle size classification and screening device, characterized in that: include: A screening cylinder (1) is provided with a feed pipe (5) at the top, a first discharge pipe (9) and a second discharge pipe (10) are provided on the side wall, and a third discharge pipe (6) is provided at the bottom; The screening and grinding component 1 (2) is located in the screening cylinder (1), and its internal space is divided into an upper screening chamber connected to the discharge pipe 1 (9) and a lower screening chamber connected to the discharge pipe 2 (10). The screening and grinding component 1 (2) is a double-layer structure, the upper layer is fixed and provided with a screening and grinding port (203), and the lower layer is provided with a grinding area and a screening area. The screening / grinding function is realized by rotating and adjusting the grinding area / screening area relative to the screening and grinding port (203); A material collecting cover (3) is located between the screening and grinding component 1 (2) and the feed pipe (5); The second screening and grinding component (4) is provided with a screening end located inside the collecting cover (3) and a grinding end located outside the collecting cover (3). The screening end is shaken on a horizontal plane to perform screening. The unscreened flame retardant is guided out of the collecting cover (3) and falls on the upper layer of the first screening and grinding component (2) by moving the screening end in a vertical direction. The flame retardant guided out of the collecting cover (3) is ground by cooperating with the grinding end and the upper layer of the first screening and grinding component (2). The screened flame retardant is guided out through a discharge pipe (6) that penetrates the first screening and grinding component (2); A dust cover (7) is located between the screening and grinding component one (2) and the discharge pipe three (6), and collects the flame retardant dust passing through the screening and grinding component one (2); A dust collection assembly (8) is located outside the screening cylinder (1), and is provided with a first dust collection end extending into the dust cover (7), and is also provided with a second dust collection end extending into the feed pipe (5); and vibrators; The upper layer of the screening and grinding component (2) is a fixed disk (202), the center of which is covered by a material collecting cover (3) and is provided with a discharge valve (209) connected to a discharge pipe (6); the screening and grinding port (203) is arranged on the outer periphery of the fixed disk (202); the lower layer of the screening and grinding component (2) is a rotating ring (201) coaxial with the fixed disk (202) and rotatably connected; a grinding plate (205) is arranged on the rotating ring (201) corresponding to the grinding area, and a screening plate (206) is arranged corresponding to the screening area; a dredging member (204) is arranged on the fixed disk (202) for acting on the screening plate (206) by jetting downward; the dredging member (204) comprises an air outlet seat (204b) with an air pump, and an air jet head (204c) located at the bottom of the air outlet seat (204b) and connected to the air pump; The second screening and grinding assembly (4) comprises a grinding piece (401); the grinding piece (401) comprises a rotating rod (401b) that can rotate and extend out of the material collecting cover (3), a mounting frame (401c) located on the top of the rotating rod (401b) and spanning the material collecting cover (3), and a grinder located on the mounting frame (401c); the grinder comprises a grinding end facing the outer periphery of the fixed disk (202); the grinding end is connected to the end of the mounting frame (401c) via a telescopic end; The screening and grinding assembly 2 (4) further comprises an outer soft sleeve (403) connected to the upper cover opening of the collecting cover (3), an inner soft sleeve (404) connected to the mounting seat 1 (406) and forming an annular screening chamber with the outer soft sleeve (403), and an annular screening plate (405) sealing the bottom of the annular screening chamber; the upper end of the annular screening chamber is connected to the feed pipe (5), and the lower end is connected to the through groove on the annular screening plate (405); the mounting seat 1 (406) is rotatably arranged on the mounting frame (401c), and is rotated The upper end of the movable rod (401b) rotates and penetrates; the annular screening plate (405) is the screening end, which is driven to rise and fall by the driving member 1 (410); the screening plate 2 (407) is arranged in the through groove, and the inner ring is rotated and penetrated by the lower end of the rotating rod (401b); the rotating rod (401b) is also provided with a rotating member (402) that acts on the annular screening plate (405), and the annular screening plate (405) is pushed to shake by locally applying force to the inner ring wall of the annular screening plate (405).

2. A flame retardant particle size classification and screening device according to claim 1, characterized in that: Multiple groups of discharge valves 1 (209) are provided; the discharge pipe 3 (6) comprises discharge branch pipes (602) corresponding one to one with the discharge valves 1 (209), a discharge main pipe (601) connected to all the discharge branch pipes (602) and extending out of the bottom of the screening cylinder (1), and a negative pressure pump (603) connected to the discharge main pipe (601).

3. The flame retardant particle size classification and screening device according to claim 1, characterized in that: The rotating member (402) comprises a second mounting seat (402a) sleeved on the rotating rod (401b); an eccentric wheel (402b) is arranged on the outer periphery of the second mounting seat (402a) for striking the annular screening plate (405) by rotating.

4. A flame retardant particle size classification and screening device according to claim 3, characterized in that: The second screening plate (407) is rotatably arranged at the upper notch of the installation slot by means of the second driving member (408); the lower notch of the installation slot is provided with a second dredging member (409) for acting on the second screening plate (407) by jetting upwards; The second dredging member (409) includes a second air outlet seat (409b) with an air pump and arranged below the second screening plate (407), and a second nozzle (409c) located on the second air outlet seat (409b) and connected to the second air pump.

5. The flame retardant particle size classification and screening device according to claim 1, characterized in that: The dust collection assembly (8) comprises a collection barrel (801) with a dust interception layer; a dust suction pump (802) corresponding to the dust collection end (1) and a dust suction pump (803) corresponding to the dust collection end (2) are arranged on the collection barrel (801); the dust suction pump (802) is connected to the dust cover (7); and the dust suction pump (803) is connected to the feed pipe (5).

6. A flame retardant particle size classification and screening device according to claim 5, characterized in that: A dust filter cover (501) is arranged inside the feed pipe (5); a dust suction end of the second dust suction pump (803) extends into the dust filter cover (501) through a pipe (804).

7. A flame retardant particle size classification and screening method, characterized in that: The flame retardant particle size classification and screening device according to claim 1 is used, and the steps are as follows: S1, the flame retardant enters the feed pipe (5), and the dust collection end of the dust collection assembly (8) collects dust; S2, the flame retardant after dust removal enters the collecting cover (3), falls on the screening end of the screening and grinding component 2 (4), and is screened once by shaking the screening end on a horizontal plane; S3, the screened flame retardant is discharged through the discharge pipe three (6); the unscreened flame retardant moves in the vertical direction through the screening end and is discharged from the collecting cover (3) and falls on the upper layer of the screening and grinding component one (2); S4. The staff chooses to discharge directly from the discharge pipe 1 (9) or further grind and screen; S5, when further grinding and screening is performed, the lower layer of the screening and grinding component 1 (2) rotates, and the grinding area is opposite to the screening and grinding port (203); the grinding end of the screening and grinding component 2 (4) cooperates with the upper layer of the screening and grinding component 1 (2) to grind the flame retardant discharged from the collecting cover (3); S6, the lower layer of the screening and grinding assembly 1 (2) rotates, the screening area is opposite to the screening and grinding port (203), and the screened flame retardant enters the lower screening chamber to complete the secondary screening; S7, the flame retardant falls on the dust cover (7), and the newly generated flame retardant dust is collected by the dust collection end of the dust collection component (8); S8. The flame retardant leaves the device from the discharge pipe 2 (10).

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