A screening device for flame-retardant masterbatch production

Abstract

The present application belongs to the technical field of screening equipment, and relates to a kind of flame-retardant masterbatch production screening equipment. Including fixed frame, the fixed frame is fixedly connected with symmetrically distributed support column, the support column is fixedly connected with first spring, symmetrically distributed first spring is commonly fixedly connected with connecting rod, the connecting rod is rotatably connected with sieve frame, the middle part in the sieve frame is provided with screening net, the side of the fixed frame away from the support column is fixedly connected with symmetrically distributed sleeve, the sleeve is sealingly slidably connected with sliding column, the sliding column is fixedly connected with second spring, symmetrically distributed second spring is commonly fixedly connected with support rod rotatably connected with the sieve frame. The present application adjusts the inclination angle of screening net, speeds up the moving speed of large-particle-size flame-retardant masterbatch, assists large-particle-size flame-retardant masterbatch to discharge from screening net, slows down the moving speed of small-particle-size flame-retardant masterbatch, increases the residence time of small-particle-size flame-retardant masterbatch on screening net, and improves screening effect.

Description

Technical Field

[0001] This invention relates to the field of screening equipment technology, and in particular to a screening equipment for the production of flame retardant masterbatch. Background Technology

[0002] In the production process of flame retardant masterbatch, screening is a crucial post-processing step to ensure uniform particle size distribution and remove impurities and excessively large or small particles. The performance of screening equipment directly affects the final quality and production efficiency of flame retardant masterbatch. Currently, the screening equipment commonly used in industrial production is mostly vibrating screens or rotary vibrating screens, whose core component is a screening screen with a certain mesh size. In existing technologies, the inclination angle of the screening screen is usually fixed during the equipment design and manufacturing process, and cannot be dynamically adjusted according to the real-time characteristics of the material during use. The specific problems are reflected in the following two aspects: Firstly, when the proportion of large-diameter particles in the flame retardant masterbatch being screened is relatively high, the thickness of the material layer on the screening mesh increases and the fluidity deteriorates. If the tilt angle of the screening mesh is too small at this time, the material flow speed on the screen surface will be slow, which can easily cause large-diameter particles to accumulate at the feed end or middle of the screen mesh, forming a "material pad". This "material pad" will hinder the effective contact between the newly added material and the screen surface. A large amount of qualified particle size material will need more time to pass through the screen holes, which will seriously slow down the screening efficiency and reduce the processing capacity of the equipment per unit time.

[0003] Secondly, when the proportion of small-diameter particles in the flame retardant masterbatch being screened is relatively high, the overall fluidity of the material is good. If the tilt angle of the screening mesh is too large, the residence time of the material on the screen surface (i.e., screening time) will be significantly shortened. Some small-diameter particles will not have time to pass through the screen holes and complete the screening before they quickly slide down the screen surface under their own gravity and vibration and are discharged from the coarse material outlet, mixing into the unqualified products. This leads to the phenomenon of "material run-off", resulting in a decrease in the yield of qualified products, a worse screening effect, and an inability to achieve the purpose of accurate grading. Summary of the Invention

[0004] To overcome the drawback of existing screening equipment where the screen tilt angle cannot be dynamically adjusted, this invention provides a screening device for flame retardant masterbatch production.

[0005] The technical solution is as follows: A flame-retardant masterbatch production screening equipment includes a fixed frame, symmetrically distributed support columns fixed to the fixed frame, a first spring fixed to each support column, the symmetrically distributed first springs being jointly fixed to a connecting rod, a screening frame rotatably connected to the connecting rod, a first power module for driving the screening frame to vibrate installed on the screening frame, a screening screen installed in the middle of the screening frame, the height of the screening frame near the support column being higher than the height of the side away from the support column, a feed hopper installed on the side of the screening frame near the support column, symmetrically distributed sleeves fixed to the side of the fixed frame away from the support column, a sliding column sealed and slidably connected to the sleeves, a second spring fixed to each sliding column, the symmetrically distributed second springs being jointly fixed to a support rod rotatably connected to the screening frame, and a collection hopper located below the screening frame fixed to the fixed frame.

[0006] As a further preferred embodiment, the hopper is slidably connected to a guide shell, the hopper is provided with a second power module for controlling the movement of the guide shell, the guide shell is provided with a guide channel, the guide channel is composed of a first inclined channel and a second inclined channel that are interconnected, the guide shell is provided with a protective net located in the first inclined channel of the guide channel, and the fixing frame is provided with a blower, the blower of the fixing frame is connected to the first inclined channel of the guide channel through a duct.

[0007] As a further preferred embodiment, the side of the first inclined groove of the guide channel closer to its second inclined groove is higher than the side farther away from its second inclined groove.

[0008] As a further preferred embodiment, a third spring is fixedly connected between the sleeve and the adjacent sliding column, a liquid guide hole is provided on the lower side of the sleeve, and a liquid reservoir communicating with the liquid guide hole is fixedly connected to the sleeve. Hydraulic oil is filled in the lower part of the sliding column, the liquid guide hole and the liquid reservoir inside the sleeve.

[0009] As a further preferred embodiment, a counterweight is provided on the side of the screening frame away from the sleeve.

[0010] As a further preferred embodiment, a sealing ball is rotatably connected to the lower side of the sleeve, the sealing ball being provided with a through hole for communicating with the liquid guiding hole, the symmetrically distributed sleeves being rotatably connected to a rotating rod, the rotating rod being fixedly connected to the symmetrically distributed sealing balls, a torsion spring being fixedly connected between the rotating rod and the sleeve, a push plate being fixedly connected to the rotating rod, and a push rod for pushing the push plate being fixedly connected to the flow guiding shell.

[0011] As a further preferred embodiment, the screening frame is provided with two symmetrically distributed sets of discharge ports, and the screening frame is fixedly connected to symmetrically distributed guide shells. The guide shells are all connected to the discharge ports in the adjacent set. The side of the guide shell away from the discharge port is connected to the side of the screening frame where the screening screen is not installed. The screening frame is fixedly connected to two symmetrically distributed sets of guide nets, both of which are placed at an incline. The number of guide nets in each set is equal to the number of discharge ports in each set and corresponds one-to-one. The aperture of the guide net is equal to the aperture of the screening screen.

[0012] As a further preferred embodiment, the screening mesh has a protrusion in the middle, and the width of the protrusion gradually narrows from the side closer to the counterweight to the side farther away from the counterweight.

[0013] As a further preferred embodiment, the length of the guide net within the same group increases sequentially from the side closer to the counterweight to the side farther away from the counterweight, and the guide net is located on the upper side of the non-protruding part of the screening net.

[0014] As a further preferred embodiment, a feed inlet is provided on the side of the feed guide shell away from the counterweight, the feed inlet is located above the collection hopper, and an intercepting mesh is provided on the feed guide shell near the feed inlet, the aperture of the intercepting mesh being equal to the aperture of the screening mesh.

[0015] This invention has the following advantages: By adjusting the tilt angle of the screening mesh, it accelerates the movement speed of large-particle-size flame retardant masterbatch, assisting it in being discharged from the screening mesh, while slowing down the movement speed of small-particle-size flame retardant masterbatch, increasing its residence time on the screening mesh, thus improving the screening effect and reducing the amount of small-particle-size flame retardant masterbatch discharged along with the large-particle-size masterbatch, thereby further improving the screening effect. The gas discharged through the vertical part of the guide groove of the guide shell blows the flame retardant masterbatch onto the screening mesh. The masterbatch is dried to reduce the stickiness of the flame retardant masterbatch surface, which assists the screening of the screening screen and reduces the amount of small-diameter flame retardant masterbatch accumulating in the guide shell. Through the guiding effect of the guide shell, the time for large-diameter flame retardant masterbatch to move from the screening screen to the screening screen on the screen frame is shortened, thereby assisting the discharge speed of large-diameter flame retardant masterbatch. By successively increasing the setting of the length of the guide shell, the interception amount of large-diameter flame retardant masterbatch by the guide shell is continuously increased, and the discharge speed of large-diameter flame retardant masterbatch from the screening screen is accelerated. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention when the push plate and push rod are not in contact; Figure 3 This is a three-dimensional structural diagram of the flow guide shell and flow guide groove of the present invention; Figure 4 This is a three-dimensional structural diagram of the push rod near the push plate of the present invention; Figure 5 This is a three-dimensional structural diagram of the material guide shell and flow guide net of the present invention.

[0017] The labels in the diagram are as follows: 1-Fixed frame, 2-Support column, 3-First spring, 4-Connecting rod, 5-Screening frame, 51-Screening screen, 52-Feed hopper, 53-Discharge port, 511-Counterweight block, 6-Sleeve, 61-Liquid guide hole, 7-Sliding column, 8-Second spring, 9-Support rod, 10-Collection hopper, 11-Guide shell, 111-Guide groove, 12-Third spring, 13-Liquid storage bladder, 14-Sealing ball, 15-Rotating rod, 16-Push plate, 17-Push rod, 18-Guide shell, 181-Guide port, 19-Interception net, 20-Guide net. Detailed Implementation

[0018] The technical solution will be further explained below with reference to specific embodiments. It should be noted that: the small and medium particle size flame retardant masterbatch mentioned below refers to flame retardant masterbatch with a particle size smaller than the aperture of sieve 51, and the large particle size flame retardant masterbatch refers to flame retardant masterbatch with a particle size larger than the aperture of sieve 51.

[0019] Example 1: In existing flame retardant masterbatch screening equipment, the tilt angle of the screening screen remains constant during screening. Since the proportion of particle size in the screened flame retardant masterbatch is unknown, if the proportion of large-diameter particles is higher than that of small-diameter particles, the excessively small tilt angle of the screening screen will cause the large-diameter flame retardant masterbatch to accumulate and not be discharged in time. This will prevent the flame retardant masterbatch that subsequently moves onto the screening screen from contacting the screening screen in a short time, thus affecting the screening speed. If the proportion of large-diameter particles is lower than that of small-diameter particles, the excessively large tilt angle of the screening screen will cause some of the small-diameter flame retardant masterbatch to be discharged from the screening screen before being screened, resulting in poor screening effect.

[0020] A screening device for flame retardant masterbatch production, such as Figures 1-5As shown, the device includes a fixed frame 1. Two symmetrically distributed support columns 2 are fixed to the left side of the fixed frame 1. A first spring 3 is fixed to the upper side of each support column 2. A connecting rod 4 is fixed to the upper side of both first springs 3. The connecting rod 4 is rotatably connected to a screening frame 5, located on the left side of the screening frame 5. The screening frame 5 is equipped with a first power module for vibration, which is a vibration motor (not shown in the figure) mounted on the screening frame 5. A screening screen 51 is installed in the middle of the screening frame 5. The left side of the screening frame 5 is higher than the right side to facilitate the dispersion of flame-retardant masterbatch to the right. A feed hopper 52 is installed on the upper left side of the screening frame 5. Two symmetrically distributed sleeves 6 are fixed to the upper right side of the fixed frame 1. A sliding column 7 is slidably connected to the upper side of each sleeve 6. A sealing ring is provided on the lower side of the sliding column 7 to increase the sealing between it and the adjacent sleeve 6. A second spring 8 is fixed to the upper side of the sliding column 7. Both the first spring 3 and the second spring 8 provide vibration for the screening frame 5. The second spring 8 is fixedly connected to a support rod 9 that is rotatably connected to the screen frame 5. The support rod 9 is located on the right side of the screen frame 5. The fixing frame 1 is fixedly connected to a collection hopper 10 located below the screen frame 5. The collection hopper 10 is used to collect small-diameter flame-retardant masterbatch screened by the screening mesh 51. A guide shell 11 is slidably connected to the upper side of the collection hopper 10. The collection hopper 10 is equipped with a second power module for controlling the movement of the guide shell 11. The second power module includes electric slide rails installed on the front and rear sides of the collection hopper 10. An electric slider (not shown in the figure) slides inside the rail. The electric slider is fixedly connected to the guide shell 11. The guide shell 11 is provided with a guide groove 111. The guide groove 111 is composed of a first inclined groove and a second inclined groove that are interconnected. The guide shell 11 is provided with a protective net located on the right side of the first inclined groove of the guide groove 111. The fixed frame 1 is provided with a blower (not shown in the figure). The blower of the fixed frame 1 is connected to the first inclined groove of the guide groove 111 through a duct. The right side of the first inclined groove of the guide groove 111 is higher than the left side.

[0021] like Figure 1 , Figure 2 and Figure 4As shown, a third spring 12 is fixedly connected between the sleeve 6 and the adjacent sliding column 7. A liquid guide hole 61 is provided on the lower side of the sleeve 6. A liquid storage bladder 13 communicating with the liquid guide hole 61 is fixedly connected to the sleeve 6. Hydraulic oil is filled in the lower part of the sliding column 7, the liquid guide hole 61 and the liquid storage bladder 13 inside the sleeve 6. A counterweight block 511 is provided on the left side of the screen frame 5. The weight of the counterweight block 511 on the left side of the fixing frame 1 balances the weight of the upper part on its right side, thereby reducing the pressure on the third spring 12. A sealing ball 14 is rotatably connected to the lower side of the sleeve 6. A through hole is provided for connecting the liquid guiding hole 61. In the initial state, the sealing ball 14 seals the adjacent liquid guiding hole 61. The opposing sides of the two sleeves 6 are rotatably connected to the rotating rod 15. The rotating rod 15 is fixed to both sealing balls 14. A torsion spring is fixed between the rotating rod 15 and the sleeve 6. The rotating rod 15 is fixed to the push plate 16. The guide shell 11 is fixed to the push rod 17 for pushing the push plate 16. When the push rod 17 contacts the adjacent push plate 16, as the push rod 17 continues to move to the right, the push rod 17 pushes the push plate 16 to rotate clockwise around the rotating rod 15. Figure 4 (From the front view direction), the push plate 16 drives the rotating rod 15 to rotate clockwise.

[0022] When this screening equipment is needed to screen flame retardant masterbatch, the operator first starts the first power module to drive the screen frame 5 to vibrate. The screen frame 5 then drives the screening screen 51 on it to vibrate. The operator then adds flame retardant masterbatch into the feed hopper 52, ensuring that the lower part of the feed hopper 52 is always filled with flame retardant masterbatch. Under these conditions, the amount of flame retardant masterbatch discharged from the feed hopper 52 per unit time is the same, meaning the weight of flame retardant masterbatch moving onto the screening screen 51 per unit time is equal. This facilitates subsequent adjustment of the tilt angle of the screening screen 51. The flame retardant masterbatch moving onto the screening screen 51 vibrates under the influence of the screen 51. Small-diameter flame retardant masterbatch passes through the screening mesh 51 and enters the collection hopper 10. Large-diameter flame retardant masterbatch is intercepted by the screening mesh 51 and remains on the screening mesh 51. The inclined screening mesh 51 causes the flame retardant masterbatch on it to move to the right. Some of the small-diameter flame retardant masterbatch that moves to the right will be screened into the collection hopper 10 on the right side of the screening mesh 51. The large-diameter flame retardant masterbatch moves to the right to the part of the screen frame 5 located on the right side of the screening mesh 51 and is finally discharged from the right side of the screen frame 5. The operator collects the large-diameter flame retardant masterbatch discharged from the right side of the screen frame 5 and at the same time collects the small-diameter flame retardant masterbatch on the right side of the collection hopper 10.

[0023] During the screening process of flame retardant masterbatch on screening screen 51, the operator drives the guide shell 11 to move back and forth along the upper side of the collection hopper 10 via the second power module. At the same time, the blower on the fixed frame 1 is started to deliver gas into the guide shell 11 through the duct. The gas entering the guide shell 11 enters the vertical part of the guide groove 111 through the horizontal part. Since the right side of the horizontal part of the guide groove 111 is higher than the left side, most of the gas entering the vertical part of the guide groove 111 will be blown upward and discharged from the top side, and discharged from the vertical part of the guide groove 111. The exhaust gas is blown onto the flame retardant masterbatch on the screening screen 51 and dried it. During the lateral movement of the guide shell 11, some of the small-diameter flame retardant masterbatch that passes through the screening screen 51 will enter the vertical part of the guide channel 111. The protective net inside the guide shell 11 prevents the small-diameter flame retardant masterbatch from entering the lateral part of the guide channel 111. Therefore, the small-diameter flame retardant masterbatch that enters the guide shell 11 can only move downwards and is eventually discharged into the collection hopper 10 through the lower side of the vertical part of the guide channel 111, thereby reducing the amount of small-diameter flame retardant masterbatch accumulating in the guide shell 11.

[0024] In the initial state, before the flame retardant masterbatch is moved onto the screening screen 51, the weight of the counterweight block 511 on the left side of the fixed frame 1 balances the weight of the upper part on its right side. The through hole of the sealing ball 14 does not connect the adjacent liquid guiding hole 61. The lower side of the sliding column 7 inside the sleeve 6 is in a sealed state with the sealing ball 14 (so that during the vibration of the screening frame 5, the deflection angle of the screening screen 51 is kept constant, improving screening efficiency). The sliding column 7 cannot move longitudinally relative to the sleeve 6. When the flame retardant masterbatch is moved onto the screening screen 51, the pressure on the upper side of the sliding column 7 increases and it will not move downward. During the process of the guide shell 11 moving to the right along the collection hopper 10, the guide shell 11 drives the two push rods 17 to move to the right. Taking the push rod 17 on the front side as an example, after the push rod 17 contacts the push plate 16, as the push rod 17 continues to move to the right, the push rod 17 pushes the push plate 16 to rotate clockwise around the rotating rod 15. Figure 4(Front view direction) The push plate 16 drives the rotating rod 15 to rotate clockwise. The torsion spring on the rotating rod 15 stores energy, and the rotating rod 15 drives the sealing ball 14 to rotate clockwise. When the guide shell 11 moves to the right side of the collection hopper 10, the operator stops the second power module, and the guide shell 11 no longer moves to the right. The through hole of the sealing ball 14 is connected to the liquid guiding hole 61. The weight of the flame retardant masterbatch on the screening screen 51 causes the right side of the screening frame 5 to move downward. The tilt angle of the screening screen 51 gradually increases, and the right side of the screening frame 5 causes... The support rod 9 drives the sliding column 7 to move downward through the second spring 8, and the third spring 12 is compressed. If the proportion of large-diameter flame retardant masterbatch on the screening screen 51 is too high at this time, the sliding column 7 will move downward a greater distance. Conversely, the sliding column 7 will move downward a shorter distance. During the downward movement of the sliding column 7, the sliding column 7 pushes the hydraulic oil below it through the through hole and the liquid guide hole 61 of the sealing ball 14 and into the liquid storage bladder 13. The liquid storage bladder 13 deforms and increases in volume to store this part of the hydraulic oil.

[0025] Taking the excessive proportion of large-diameter flame retardant masterbatch on screening screen 51 as an example, the operator controls the guide shell 11 to move to the left through the second power module. The guide shell 11 drives the push rod 17 to move to the left. The push rod 17 no longer squeezes the push plate 16. The torque of the torsion spring on the rotating rod 15 is released, causing the rotating rod 15 to rotate counterclockwise. The rotating rod 15 drives the push plate 16 to rotate counterclockwise. When the right end of the push rod 17 no longer contacts the push plate 16, the torque of the torsion spring on the rotating rod 15 is restored. The sealing ball 14 blocks the liquid guiding hole 61, and the sliding column 7 and the sleeve 6 cannot move relative to each other. The tilt angle of screening screen 51 remains unchanged. Then, screening screen 51 maintains this tilt angle to screen the excessively large-diameter flame retardant masterbatch, accelerating the screening of large-diameter flame retardant masterbatch. The speed at which the masterbatch moves to the right helps the large-diameter flame retardant masterbatch to be discharged from the screening screen 51. The tilt angle of the screening screen 51 is adjusted again when the through hole of the sealing ball 14 reconnects the liquid guiding hole 61. If the proportion of large-diameter flame retardant masterbatch on the screening screen 51 is too low, the tilt angle of the screening screen 51 is smaller than the above-mentioned tilt angle, thereby slowing down the speed at which the small-diameter flame retardant masterbatch moves to the right, increasing the time that the small-diameter flame retardant masterbatch stays on the screening screen 51, and reducing the amount of small-diameter flame retardant masterbatch discharged with the large-diameter flame retardant masterbatch, thereby further improving the screening effect. After the flame retardant masterbatch screening process is completed, the operator turns off the first power module, the second power module and the blower, and the screening equipment is finished.

[0026] Example 2: Based on Example 1, a flame retardant masterbatch production screening equipment, such as... Figure 1 , Figure 2 and Figure 5As shown, the screening frame 5 is provided with two sets of discharge ports 53 symmetrically distributed front and back, with three discharge ports 53 in each set. Two guide shells 18 are fixedly connected to the screening frame 5, symmetrically distributed front and back. Each guide shell 18 is connected to all three discharge ports 53 in an adjacent set. The right side of the guide shell 18 is connected to the side of the screening frame 5 where the screening screen 51 is not installed. Two sets of guide nets 20 are fixedly connected to the screening frame 5, symmetrically distributed and inclined. The side of the guide net 20 away from the screening frame 5 is located on the left side of the side closest to the screening frame 5. Each set of guide nets 20 consists of three nets, each corresponding to one of the adjacent discharge ports 53. The aperture of the guide nets 20 is equal to the aperture of the screening screen 51. Through the guiding action of the guide shells 18, the time it takes for large-diameter flame-retardant masterbatch to move from the screening screen 51 to the right side of the screening screen 51 on the screening frame 5 is shortened, thereby accelerating the movement of large-diameter flame-retardant masterbatch. To improve the discharge speed, a raised section is provided in the middle of the screening screen 51. The width of the raised section of the screening screen 51 gradually narrows from left to right. The length of the guide net 20 in the same group gradually increases from left to right, continuously increasing the interception amount of large-diameter flame retardant masterbatch by the guide net 20 and accelerating the discharge speed of large-diameter flame retardant masterbatch from the screening screen 51. The guide net 20 is located on the upper side of the non-raised section of the screening screen 51. A guide port 181 is provided on the right side of the guide shell 18. The guide port 181 is located above the collection hopper 10. An intercepting net 19 is provided near the guide port 181 of the guide shell 18. The aperture of the intercepting net 19 is equal to that of the screening screen 51. It is used to screen the small-diameter flame retardant masterbatch that enters the guide shell 18 along with the large-diameter flame retardant masterbatch, reducing the amount of small-diameter flame retardant masterbatch discharged from the right side of the screening frame 5 and improving the screening effect of the flame retardant masterbatch.

[0027] During the process of flame retardant masterbatch being discharged from hopper 52 and transferred to screen 51, the masterbatch preferentially contacts the middle of the left side of screen 51. The protrusion in the middle of screen 51 guides the masterbatch to the front and back sides of the protrusion. As flame retardant masterbatch is continuously added to the left side of screen 51, the amount of masterbatch on the left side of screen 51 is higher than on the right side. Therefore, the width of the protrusion on the left side of screen 51 is greater than that on the right side, causing small-diameter flame retardant masterbatch to stay on the left side of the protrusion for a longer time, increasing the size of the small-diameter masterbatch on the left side. The time it takes for the flame retardant masterbatch to move to the non-protruding part of the screening mesh 51 ensures that most of the small-diameter flame retardant masterbatch on the left side is screened into the collection hopper 10 by the protruding part of the screening mesh 51. The small-diameter flame retardant masterbatch that enters the non-protruding part of the screening mesh 51 will also pass through the mesh of the guide net 20 and continue to move to the right. The large-diameter flame retardant masterbatch will move to the non-protruding part of the screening mesh 51 and, after contacting the guide net 20, will be guided into the adjacent guide shell 18. Finally, it will enter the right side of the screening mesh 51 on the screening frame 5 through the right side of the guide shell 18.

[0028] The guiding effect of the guide shell 18 shortens the time it takes for large-diameter flame retardant masterbatch to move from the screening mesh 51 to the right side of the screening mesh 51 on the screening frame 5 (if the large-diameter flame retardant masterbatch only moves to the right from the top of the screening mesh 51, the mesh of the screening mesh 51 will resist the movement of the large-diameter flame retardant masterbatch to the right, thereby reducing the speed at which the large-diameter flame retardant masterbatch moves to the right), thus accelerating the discharge speed of the large-diameter flame retardant masterbatch. Since the proportion of large-diameter flame retardant masterbatch on the right side is greater than that of small-diameter flame retardant masterbatch, by increasing the length of the guide mesh 20 from left to right, the guiding effect is continuously improved. The screen 20 intercepts large-diameter flame retardant masterbatch, accelerating the discharge speed of large-diameter flame retardant masterbatch from the screening screen 51. During the process of large-diameter flame retardant masterbatch entering the feed guide shell 18 on the screening screen 51, some small-diameter flame retardant masterbatch will also enter the feed guide shell 18. When these small-diameter flame retardant masterbatches move above the feed inlet 181, they pass through the intercepting screen 19 and enter the feed inlet 181, and finally enter the collection hopper 10. This method reduces the amount of small-diameter flame retardant masterbatch discharged from the right side of the screening frame 5, and improves the screening effect of flame retardant masterbatch.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flame retardant masterbatch production screening equipment, comprising a fixed frame (1), wherein the fixed frame (1) is fixedly connected to symmetrically distributed support columns (2), the support columns (2) are fixedly connected to first springs (3), the symmetrically distributed first springs (3) are jointly fixedly connected to a connecting rod (4), the connecting rod (4) is rotatably connected to a screening frame (5), the screening frame (5) is equipped with a first power module for driving its vibration, a screening screen (51) is installed in the middle of the screening frame (5), the height of the screening frame (5) near the support column (2) is higher than the height of the side away from the support column (2), a feed hopper (52) is installed on the side of the screening frame (5) near the support column (2), and symmetrically distributed sleeves (6) are fixedly connected to the side of the fixed frame (1) away from the support column (2), characterized in that, The sleeve (6) is slidably connected to a sliding column (7), and the sliding column (7) is fixedly connected to a second spring (8). The symmetrically distributed second springs (8) are jointly fixedly connected to a support rod (9) that is rotatably connected to the screen frame (5). The fixed frame (1) is fixedly connected to a collection hopper (10) located below the screen frame (5). The collection hopper (10) is slidably connected to a guide shell (11). The collection hopper (10) is provided with a second power module for controlling the movement of the guide shell (11). The guide shell (11) is provided with a guide groove (111). The guide groove (111) is composed of a first inclined groove and a second inclined groove that are interconnected. A protective net is provided in the first inclined groove of the guide channel (111). The fixed frame (1) is equipped with a blower. The blower of the fixed frame (1) is connected to the first inclined groove of the guide channel (111) through a conduit. A third spring (12) is fixed between the sleeve (6) and the adjacent sliding column (7). A liquid guide hole (61) is provided on the lower side of the sleeve (6). A liquid storage bladder (13) connected to the liquid guide hole (61) is fixed to the sleeve (6). Hydraulic oil is filled in the lower part of the sleeve (6), below the sliding column (7), in the liquid guide hole (61), and in the liquid storage bladder (13). A sealing ball is rotatably connected to the lower side of the sleeve (6). 14), the sealing ball (14) is provided with a through hole for connecting the liquid guiding hole (61), the symmetrically distributed sleeves (6) are rotatably connected to a rotating rod (15), the rotating rod (15) and the symmetrically distributed sealing ball (14) are both fixedly connected, a torsion spring is fixedly connected between the rotating rod (15) and the sleeve (6), the rotating rod (15) is fixedly connected to a push plate (16), the guide shell (11) is fixedly connected to a push rod (17) for pushing the push plate (16); the first inclined groove of the guide groove (111) is higher on the side closer to its second inclined groove than on the side farther from its second inclined groove; the screen frame (5) is provided with a counterweight (51) on the side away from the sleeve (6). 1) The screening frame (5) is provided with two sets of symmetrically distributed discharge ports (53). The screening frame (5) is fixed with symmetrically distributed guide shells (18). The guide shells (18) are connected to the discharge ports (53) in the adjacent set. The side of the guide shell (18) away from the discharge port (53) is connected to the side of the screening frame (5) where the screening screen (5) is not installed. The screening frame (5) is fixed with two sets of symmetrically distributed and inclined guide nets (20). The number of each set of guide nets (20) is equal to the number of each set of discharge ports (53) and corresponds one-to-one. The aperture of the guide nets (20) is equal to the aperture of the screening screen (51).

2. The flame retardant masterbatch production screening equipment according to claim 1, characterized in that, The sieve (51) has a protrusion in the middle, and the width of the protrusion gradually narrows from the side closer to the counterweight (511) to the side farther away from the counterweight (511).

3. The flame retardant masterbatch production screening equipment according to claim 2, characterized in that, The length of the guide net (20) in the same group increases sequentially from the side closer to the counterweight (511) to the side farther away from the counterweight (511), and the guide net (20) is located on the upper side of the non-protruding part of the screening net (51).

4. The flame retardant masterbatch production screening equipment according to claim 3, characterized in that, The feed guide shell (18) is provided with a feed inlet (181) on the side away from the counterweight (511). The feed inlet (181) is located above the collection hopper (10). The feed guide shell (18) is provided with an intercepting net (19) near the feed inlet (181). The aperture of the intercepting net (19) is equal to the aperture of the screening net (51).

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