A vibrating screen and method for processing basalt fiber raw materials

Abstract

The present invention relates to the technical field of basalt raw material screening, and specifically proposes a basalt fiber raw material processing vibration screen and method, including: a supporting fixed frame, a connecting platform and a grading screening mechanism. The basalt fiber raw material processing vibration screen designed by the present invention realizes the function of multi-level integrated continuous screening of raw materials through the grading screening mechanism and the vibration mechanism, greatly improving the convenience and efficiency of multi-level screening of raw materials; and when the four-sided cone screen is used to screen the raw materials, the four sides of the four-sided cone screen all play a diversion and dispersion vibration feeding effect, which improves the dispersion screening effect of the raw materials, the adequacy of the screening and the quality of the raw material screening. At the same time, a plurality of guide barrels arranged from top to bottom are used to gather and guide the raw materials screened during multi-level screening, and then the raw materials are discharged through a plurality of discharge pipes arranged in an interlaced manner, which improves the convenience of classifying and collecting the raw materials.

Description

Technical Field

[0001] The invention relates to the technical field of basalt raw material screening, and specifically proposes a basalt fiber raw material processing vibration screen and a method. Background Art

[0002] Basalt fiber is a high-performance inorganic non-metallic mineral fiber. Its raw materials mainly come from natural basalt. When preparing basalt fiber, the basalt ore raw materials need to be crushed first, and the large pieces of basalt ore are broken into small pieces, and then screened. The crushed basalt ore is graded according to particle size to ensure that the particle size of the material entering the next process meets the requirements.

[0003] At present, when basalt fiber raw materials are screened by size, a vibrating screen with a herringbone structure is often used. When such a vibrating screen is used to screen the raw materials, the raw materials directly move along the inclined surface of the vibrating screen for single-stage vibration screening, and it is difficult to achieve the function of multi-level classification according to the particle size of the raw materials. Moreover, when the raw materials are poured onto the vibrating screen with a herringbone structure, the vibrating screen with a herringbone structure can only perform diversion and dispersion screening on the inclined surfaces on both sides of the raw materials. Some raw materials cannot be fully contacted and screened with the vibrating screen, thereby reducing the adequacy and screening quality of the raw material screening. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a vibrating screen and method for processing basalt fiber raw materials to solve the technical problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: a basalt fiber raw material processing vibrating screen, comprising: a supporting and fixing frame, a connecting platform is installed on the top of the supporting and fixing frame through a vibrating mechanism, a discharge slot is opened in the middle of the connecting platform, and a grading screening mechanism is installed on the top of the connecting platform.

[0006] The grading screening mechanism comprises a four-sided conical screen and a four-sided conical cover installed on a connecting platform, the four-sided conical cover is sleeved on the four-sided conical screen, the four-sided conical screen is composed of conical screening frames arranged and connected in sequence from top to bottom, except for the conical screening frame at the bottom, the other conical screening frames are all provided with screening holes, the apertures of the screening holes on the multiple conical screening frames increase in sequence from top to bottom, the four side walls of the conical screening frame at the bottom are all provided with rectangular discharge openings, an inclined plate is installed between the rectangular discharge opening and the inner wall of the four-sided conical cover, a classification and discharge group is installed between the inner wall of the four-sided conical screen and the discharge slot, the four corners of the inner wall of the four-sided conical cover correspond one by one to the four corner edges of the four-sided conical screen and are all commonly installed with partition strips, the four surfaces of the inner wall of the four-sided conical cover are provided with automatic opening and closing groups for grade separation, and the four-sided conical cover is provided with a step-by-step discharge driving group for driving the automatic opening and closing groups for grade separation on the four surfaces.

[0007] The grade separation automatic opening and closing group includes a plurality of arc grooves which are opened on the inner wall of the four-sided conical cover and arranged in sequence from top to bottom. Both ends of the arc grooves are conical. The arc grooves correspond one to one with the conical screening frames with screening holes. A rotating shaft is rotatably connected in the arc grooves. The rotating shaft is provided with baffles which are evenly arranged along its circumference. The baffles are trapezoidal structures whose dimensions gradually decrease in the direction away from the rotating shaft. The two inclined side edges of the baffles are distributed along the axial direction of the rotating shaft and are respectively parallel to the corresponding partition strips. The step-by-step discharging drive group drives the plurality of rotating shafts arranged from bottom to top to rotate in sequence.

[0008] In a possible implementation, except for the end surface connected to the rotating shaft, the other three end surfaces of the baffle are rotatably connected to anti-friction rollers.

[0009] In one possible implementation, the step-by-step discharge drive group includes inclined grooves opened at the four corners of the four-sided conical cover, and bevel gears are fixedly installed at both ends of the rotating shaft after passing through the corresponding inclined grooves. The two adjacent bevel gears are meshed for transmission, and one end of the multiple rotating shafts located on one of the side walls of the four-sided conical cover and arranged from top to bottom passes through the four-sided conical cover and is connected to an intermittent staggered rotating drive source.

[0010] In one possible implementation, the classification and discharge group includes a material guide cylinder installed near the lower end of the inner wall of a conical screening frame, and the multiple material guide cylinders increase in size from top to bottom. A discharge pipe connected to the material guide cylinder is installed at the lower end, and the multiple discharge pipes are arranged in an alternating manner along the circumference of a discharge slot, and a bracket is installed between the discharge pipe and the discharge slot.

[0011] In a possible implementation, a guide plate is installed between the inner wall of the material guiding cylinder and the side wall of the material discharge pipe penetrating the side wall thereof.

[0012] In one possible implementation, the arc-shaped groove is provided with an installation groove on its inner wall below the rotating shaft connected therein, a swing baffle bar is rotatably connected to the installation groove via a torsion spring rod, and a matching stop bar matching the swing baffle bar is installed between each baffle side wall and the rotating shaft.

[0013] In a possible implementation, evenly arranged cylindrical oblique rods are installed between the outer side wall of the guide cylinder and the corresponding inner wall of the conical screening frame.

[0014] In a possible implementation, the upper end of the material guiding cylinder is a funnel structure with a gradually increasing opening diameter and connected to a corresponding conical screening frame.

[0015] In a possible implementation, a guide hopper with a gradually increasing opening diameter is installed on the top of the four-sided conical cover.

[0016] The present invention also improves a basalt fiber raw material processing vibration screening method, comprising the following steps: S1, feed diversion: pouring the raw material from the top of the four-sided conical screen into the space between the four-sided conical screen and the four-sided conical cover, and diverting the raw material at the top of the four-sided conical screen so that the raw material enters between the four opposite surfaces of the four-sided conical screen and the four-sided conical cover.

[0017] S2, multi-stage screening: when the raw materials are poured from the top of the four-sided conical screen, the screening holes at the top of the four-sided conical screen perform primary screening on the raw materials, and the baffle in the primary screening area blocks the raw materials. The raw materials stay between the conical screening frame and the four-sided conical cover for a period of time, so that the raw materials can be fully screened; when the primary screening is completed, the rotating shaft at the primary screening area drives the baffle to rotate, thereby opening the primary screening area, allowing the raw materials to enter the secondary screening area. At this time, the rotating shaft on the primary screening area drives the next baffle to rotate to close the primary screening area, and the next batch of new raw materials is poured in. The secondary screening area performs secondary screening on the raw materials. After the secondary screening is completed, the rotating shaft at the secondary screening area drives the baffle to rotate to open the secondary screening area to discharge the raw materials into the third screening area. After the third screening is completed, the rotating shaft at the third screening area drives the baffle to rotate to open the third screening area so that the remaining raw materials with the largest particles are discharged from the rectangular discharge port.

[0018] S3, classified discharge: multiple guide barrels arranged from top to bottom gather and discharge the raw materials of the first-stage screening, the second-stage screening, and the third-stage screening in turn, and then collect them at the lower end of each discharge pipe through existing collecting equipment.

[0019] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A basalt fiber raw material processing vibration screen designed by the present invention realizes the function of multi-stage integrated continuous screening of raw materials by cooperating with a graded screening mechanism and a vibration mechanism, which greatly improves the convenience and efficiency of multi-stage screening of raw materials; and when a four-sided conical screen is used to screen the raw materials, the four sides of the four-sided conical screen all have a diversion and dispersed vibration feeding effect, which improves the dispersed screening effect of the raw materials, the adequacy of the screening and the quality of the raw material screening.

[0020] 2. The four sides of the four-sided conical screen in the present invention screen the raw materials simultaneously, which not only increases the efficiency of raw material screening and the screening amount each time, but also cooperates with the four-sided conical cover to make the raw materials stay in each screening area for a certain period of time, so that the raw materials can be fully screened, further improving the adequacy of raw material screening.

[0021] 3. The multiple material guide barrels arranged from top to bottom in the present invention gather and guide the raw materials screened during multi-stage screening in turn, and then discharge the raw materials through multiple staggered discharge pipes, thereby improving the convenience of classifying and collecting the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the raw material processing vibration screen of the present invention.

[0024] Figure 2 It is a partial three-dimensional structural schematic diagram of the four-sided cone screen and the grade separation automatic opening and closing group of the present invention.

[0025] Figure 3 It is a first three-dimensional structural schematic diagram of the four-sided conical cover and the partition strips of the present invention.

[0026] Figure 4 It is a second three-dimensional structural schematic diagram of the four-sided conical cover and the partition strips of the present invention.

[0027] Figure 5 The present invention Figure 1 Main sectional view.

[0028] Figure 6 The present invention Figure 5 Enlarged view of point A.

[0029] Figure 7 The present invention Figure 1 Top cross-sectional view of .

[0030] Figure numerals: 1. Support and fixing frame; 2. Vibrating mechanism; 3. Connecting platform; 4. Discharge chute; 5. Grading screening mechanism; 50. Four-sided conical screen; 51. Four-sided conical cover; 510. Guide hopper; 52. Rectangular discharge port; 53. Inclined plate; 54. Classification discharge group; 540. Guide cylinder; 541. Discharge pipe; 542. Bracket; 543. Guide plate; 544. Cylindrical inclined rod; 55. Partition bar; 56. Grade separation automatic opening and closing group; 560. Arc groove; 561. Rotating shaft; 562. Baffle; 57. Step-by-step discharge drive group; 570. Inclined groove; 571. Bevel gear; 580. Mounting groove; 581. Swinging baffle bar; 582. Matching stop bar. 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] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] See also Figure 1 and Figure 5 A basalt fiber raw material processing vibrating screen comprises: a supporting and fixing frame 1, a connecting platform 3 is installed on the top of the supporting and fixing frame 1 through a vibrating mechanism 2, a discharge slot 4 is opened in the middle of the connecting platform 3, and a grading screening mechanism 5 is installed on the top of the connecting platform 3.

[0034] A mounting groove is provided on the supporting and fixing frame 1, and the vibration mechanism 2 can be a vibration motor arranged in the mounting groove for driving the connecting platform 3 and the grading and screening mechanism 5 to perform vibration screening.

[0035] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 The grading screening mechanism 5 comprises a four-sided conical screen 50 and a four-sided conical cover 51 mounted on the connecting platform 3. The four-sided conical cover 51 is sleeved on the four-sided conical screen 50. The four-sided conical screen 50 is composed of conical screening frames arranged and connected in sequence from top to bottom. Except for the conical screening frame at the bottom, the other conical screening frames are all provided with screening holes (not shown in the figure). The apertures of the screening holes on the multiple conical screening frames increase in sequence from top to bottom. The four side walls of the conical screening frame at the bottom are all provided with rectangular feed openings 52. The rectangular feed openings 52 and the inner wall of the four-sided conical cover 51 are connected to each other. An inclined plate 53 is installed between the four sides, a classification discharge group 54 is installed between the inner wall of the four-sided conical screen 50 and the discharge slot 4, the four corners of the inner wall of the four-sided conical cover 51 correspond to the four corner edges of the four-sided conical screen 50 one by one and are jointly installed with partition strips 55, which not only improves the stability of the connection of the four-sided conical screen 50, but also enables the raw materials to be diverted and evenly screened, the four surfaces of the inner wall of the four-sided conical cover 51 are provided with grade separation automatic opening and closing groups 56, and the four-sided conical cover 51 is provided with a step-by-step discharge driving group 57 for driving the grade separation automatic opening and closing groups 56 on the four surfaces.

[0036] The raw material is poured from the top of the four-sided conical screen 50 into between the four-sided conical screen 50 and the four-sided conical cover 51. The top of the four-sided conical screen 50 diverts the raw material so that the raw material can be fully screened. Each side of the four-sided conical screen 50 is an inclined surface, which cooperates with the vibration mechanism 2 to increase the screening speed. The conical screening frames arranged from top to bottom cooperate with the grade separation automatic opening and closing group 56, and the conical screening frames are divided into a primary screening area, a secondary screening area and a tertiary screening area from top to bottom according to the size of the screening holes. The raw material particles screened out by the primary screening area, the secondary screening area and the tertiary screening area increase in size in turn, and the largest raw material particles are directly discharged from the rectangular discharge port 52.

[0037] See also Figure 5 and Figure 6 The grade separation automatic opening and closing group 56 includes a plurality of arc grooves 560 which are opened on the inner wall of the four-sided conical cover 51 and arranged in sequence from top to bottom. Both ends of the arc grooves 560 are conical. The arc grooves 560 correspond one to one with the conical screening frames with screening holes. A rotating shaft 561 is rotatably connected in the arc grooves 560. The rotating shaft 561 is provided with baffles 562 which are evenly arranged along its circumference. The baffles 562 are trapezoidal structures whose dimensions gradually decrease in the direction away from the rotating shaft 561. The two inclined side edges of the baffles 562 are axially distributed along the rotating shaft 561 and are respectively parallel to the corresponding partition strips 55. The step-by-step discharging drive group 57 drives the plurality of rotating shafts 561 arranged from bottom to top to rotate in sequence.

[0038] When the raw material is poured from the top of the four-sided conical screen 50, the four-sided conical screen 50 diverts the raw material and the uppermost screening hole of the four-sided conical screen 50 performs primary screening on the raw material. The baffle 562 in the primary screening area blocks the raw material, and the raw material stays between the conical screening frame and the four-sided conical cover 51 for a period of time, so that the raw material can be fully screened. When the primary screening is completed, the rotating shaft 561 at the primary screening location drives the baffle 562 to rotate, thereby opening the primary screening area, so that the remaining raw material enters the secondary screening area. At this time, the rotating shaft 561 on the first-level screening area drives the next baffle 562 to rotate to close the first-level screening area, and the next batch of new raw materials are poured in. The second-level screening area performs second-level screening on the raw materials. After the second-level screening is completed, the rotating shaft 561 at the second-level screening area drives the baffle 562 to rotate to open the second-level screening area to allow the remaining raw materials to enter the third-level screening area. After the third-level screening is completed, the rotating shaft 561 at the third-level screening area drives the baffle 562 to rotate to open the third-level screening area to allow the remaining raw materials with the largest particles to be discharged from the rectangular discharge port 52.

[0039] The step-by-step discharge drive group 57 drives multiple rotating shafts 561 to rotate alternately in sequence, so that the raw materials in the next screening area are discharged and then the previous raw materials fall down. After the rotating shaft 561 at the top stops rotating intermittently, new raw materials are fed in.

[0040] In summary, by cooperating with the grading screening mechanism 5 and the vibration mechanism 2, the function of four-stage integrated screening of raw materials is realized, which greatly improves the convenience and efficiency of multi-stage screening of raw materials, and the four sides of the four-sided conical screen 50 can screen the raw materials at the same time, which not only increases the efficiency of raw material screening and the screening amount each time, but also can cooperate with the four-sided conical cover 51 so that the raw materials can be fully screened at each level.

[0041] See also Figure 6 Except for the end face connected to the rotating shaft 561, the other three end faces of the baffle 562 are rotatably connected to anti-friction rollers (the anti-friction rollers installed on the two end faces of the baffle 562 distributed axially along the rotating shaft 561 are not shown in the figure). The anti-friction rollers are used to reduce the friction between the baffle 562 and the four-sided conical screen 50 and the partition strips 55 when the baffle 562 rotates.

[0042] See also Figure 1 and Figure 7 The step-by-step discharge drive group 57 includes inclined grooves 570 provided at the four corners of the four-sided conical cover 51, and bevel gears 571 are fixedly installed at both ends of the rotating shaft 561 after passing through the corresponding inclined grooves 570, and the adjacent two bevel gears 571 are meshed and transmitted, and one end of the multiple rotating shafts 561 located on one side wall of the four-sided conical cover 51 and arranged from top to bottom passes through the four-sided conical cover 51 and is connected to an intermittent staggered rotation drive source (not shown in the figure).

[0043] The intermittent staggered rotation drive source includes drive shafts arranged in sequence from top to bottom and installed on the side walls of the four-sided conical cover 51. The drive shafts are connected to each other through a sprocket chain transmission. One of the drive shafts is connected to the motor. The rotating shaft 561 passes through the four-sided conical cover 51 and is connected to the corresponding driving shaft through a groove wheel mechanism. The driving shaft continuously rotates to drive the rotating shaft 561 to rotate intermittently through the groove wheel mechanism, so that the multiple rotating shafts 561 rotate intermittently in a staggered manner, and the multiple rotating shafts 561 at the same height are meshed and transmitted through the bevel gear 571.

[0044] See also Figure 5 The classification discharge group 54 includes a material guide cylinder 540 installed near the lower end of the inner wall of the conical screening frame. The multiple material guide cylinders 540 increase in size from top to bottom. The lower end of the material guide cylinder 540 is installed with a discharge pipe 541 connected thereto. The multiple discharge pipes 541 are staggeredly arranged along the circumference of the discharge slot 4, and a bracket 542 is installed between the discharge pipe 541 and the discharge slot 4.

[0045] The multiple material guide barrels 540 arranged from top to bottom gather, guide and discharge the raw materials after the first-stage screening, the second-stage screening and the third-stage screening in turn, and the multiple discharge pipes are arranged in a staggered manner to facilitate the classification and collection of the raw materials.

[0046] See also Figure 5 A guide plate 543 is installed between the inner wall of the guide cylinder 540 and the side wall of the discharge pipe 541 that passes through the side wall. The guide plate 543 is used to guide the raw materials to prevent the discharge pipe 541 from hindering the movement and falling of the raw materials. At the same time, it also makes the multiple guide cylinders 540 and the discharge pipe 541 connected and supported to each other to improve stability.

[0047] See also Figure 6 The inner wall of the arc groove 560 below the rotating shaft 561 connected thereto is provided with an installation groove 580, and a swinging baffle 581 is rotatably connected to the installation groove 580 through a torsion spring rod, and a matching blocking bar 582 matching with the swinging baffle 581 is installed between the side wall of each baffle 562 and the rotating shaft 561, and the matching blocking bar 582 matches with the swinging baffle 581 to block the falling raw materials and the raw materials in the screening process, so as to prevent the raw materials from entering the arc groove 560 and jamming the rotating shaft 561, thereby affecting the rotation of the rotating shaft 561.

[0048] See also Figure 5 Evenly arranged cylindrical oblique rods 544 are installed between the outer wall of the guide barrel 540 and the corresponding inner wall of the conical screening frame, thereby improving the stability of the guide barrel 540. At the same time, the cylindrical oblique rods 544 will not affect the downward fall of the screened raw materials.

[0049] See also Figure 5 The upper end of the material guide barrel 540 is a funnel structure with a gradually increasing opening diameter and connected to a corresponding conical screening frame, so that the screened raw materials can enter the material guide barrel 540 .

[0050] See also Figure 3 and Figure 6 A material guide hopper 510 with a gradually increasing diameter is installed on the top of the four-sided conical cover 51 to facilitate the raw materials to enter between the four-sided conical screen 50 and the four-sided conical cover 51.

[0051] The present invention also improves a vibration screening method for processing basalt fiber raw materials, comprising the following steps: S1, feed diversion: pouring the raw materials from the top of the four-sided conical screen 50 into the space between the four-sided conical screen 50 and the four-sided conical cover 51, and diverting the raw materials at the top of the four-sided conical screen 50 so that the raw materials enter between the four opposite surfaces of the four-sided conical screen 50 and the four-sided conical cover 51.

[0052] S2, multi-stage screening: when the raw materials are poured from the top of the four-sided conical screen 50, the screening holes at the top of the four-sided conical screen 50 perform primary screening on the raw materials, and the baffle 562 in the primary screening area blocks the raw materials, and the raw materials stay between the conical screening frame and the four-sided conical cover 51 for a period of time, so that the raw materials can be fully screened; when the primary screening is completed, the rotating shaft 561 at the primary screening area drives the baffle 562 to rotate, thereby opening the primary screening area, so that the remaining raw materials enter the secondary screening area, at this time, the rotating shaft 561 on the primary screening area drives the next baffle 562 to rotate to close the primary screening area, and the next batch of new raw materials is poured in, and the secondary screening area performs secondary screening on the remaining raw materials. After the secondary screening is completed, the rotating shaft 561 at the secondary screening area drives the baffle 562 to rotate to open the secondary screening area to discharge the raw materials into the third screening area. After the third screening is completed, the rotating shaft 561 at the third screening area drives the baffle 562 to rotate to open the third screening area so that the remaining raw materials with the largest particles are discharged from the rectangular discharge port 52.

[0053] S3, classified discharge: multiple material guide cylinders 540 arranged from top to bottom gather and discharge the raw materials of the first-stage screening, the second-stage screening, and the third-stage screening in turn, and then collect them at the lower end of each discharge pipe 541 through existing collecting equipment.

[0054] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibrating screen for processing basalt fiber raw materials, characterized in that: include: A supporting fixed frame (1), a connecting platform (3) is installed on the top of the supporting fixed frame (1) through a vibrating mechanism (2), a discharge slot (4) is opened in the middle of the connecting platform (3), and a grading screening mechanism (5) is installed on the top of the connecting platform (3); The grading screening mechanism (5) comprises a four-sided conical screen (50) and a four-sided conical cover (51) mounted on the connecting platform (3); the four-sided conical cover (51) is sleeved on the four-sided conical screen (50); the four-sided conical screen (50) is composed of conical screening frames arranged and connected in sequence from top to bottom; except for the conical screening frame at the bottom, the other conical screening frames are all provided with screening holes; the apertures of the screening holes on the multiple conical screening frames increase in sequence from top to bottom; the four side walls of the conical screening frame at the bottom are all provided with rectangular discharge openings (52); the rectangular discharge openings (52) and the four conical screening frames are connected in sequence from top to bottom; Inclined plates (53) are installed between the inner walls of the four-sided conical cover (51), a classification and discharge group (54) is installed between the inner wall of the four-sided conical screen (50) and the discharge slot (4), the four corners of the inner wall of the four-sided conical cover (51) correspond to the four corner edges of the four-sided conical screen (50) one by one and are all commonly installed with partition strips (55), the four surfaces of the inner wall of the four-sided conical cover (51) are all provided with grade separation automatic opening and closing groups (56), and the four-sided conical cover (51) is provided with a step-by-step discharge driving group (57) for driving the grade separation automatic opening and closing groups (56) on the four surfaces; The grade separation automatic opening and closing group (56) comprises a plurality of arc grooves (560) provided on the inner side wall of the four-sided conical cover (51) and arranged in sequence from top to bottom, both ends of the arc grooves (560) are conical, and the arc grooves (560) correspond one to one with the conical screening frame provided with screening holes, a rotating shaft (561) is rotatably connected in the arc grooves (560), and baffles (562) evenly arranged along the circumference of the rotating shaft (561) are installed on the rotating shaft (561), and the baffles (562) are in a trapezoidal structure with a size gradually decreasing in a direction away from the rotating shaft (561), and two inclined side edges of the baffles (562) are distributed axially along the rotating shaft (561) and are respectively parallel to the corresponding partition strips (55), and the step-by-step material discharge driving group (57) drives the plurality of rotating shafts (561) to perform intermittent rotation in sequence.

2. The basalt fiber raw material processing vibrating screen according to claim 1, characterized in that: The step-by-step discharge drive group (57) comprises inclined grooves (570) provided at four corners of the four-sided conical cover (51), bevel gears (571) are fixedly installed on both ends of the rotating shaft (561) after passing through the corresponding inclined grooves (570), and two adjacent bevel gears (571) are meshed and driven, and one end of a plurality of rotating shafts (561) located on one side wall of the four-sided conical cover (51) and arranged from top to bottom passes through the four-sided conical cover (51) and is connected to an intermittent staggered rotating drive source.

3. The basalt fiber raw material processing vibrating screen according to claim 1, characterized in that: The classification discharge group (54) comprises a material guide cylinder (540) installed near the lower end of the inner wall of the conical screening frame, the plurality of material guide cylinders (540) increasing in size from top to bottom, a discharge pipe (541) connected thereto is installed at the lower end of the material guide cylinder (540), the plurality of discharge pipes (541) are arranged in a staggered manner along the circumference of the discharge channel (4), and a bracket (542) is installed between the discharge pipe (541) and the discharge channel (4).

4. The basalt fiber raw material processing vibrating screen according to claim 1, characterized in that: The inner wall of the arc-shaped groove (560) below the rotating shaft (561) connected thereto is provided with a mounting groove (580), a swinging stop bar (581) is rotatably connected in the mounting groove (580) via a torsion spring rod, and a matching stop bar (582) matching with the swinging stop bar (581) is installed between the side wall of each baffle (562) and the rotating shaft (561).

5. The basalt fiber raw material processing vibrating screen according to claim 3, characterized in that: A guide plate (543) is installed between the inner wall of the material guiding cylinder (540) and the side wall of a material discharge pipe (541) penetrating the side wall thereof.

6. The basalt fiber raw material processing vibrating screen according to claim 1, characterized in that: A material guide hopper (510) with a gradually increasing opening diameter is installed on the top of the four-sided conical cover (51).

7. The basalt fiber raw material processing vibrating screen according to claim 1, characterized in that: Except for the end surface connected to the rotating shaft (561), the other three end surfaces of the baffle (562) are rotatably connected to anti-friction rollers.

8. The basalt fiber raw material processing vibrating screen according to claim 3, characterized in that: Evenly arranged cylindrical oblique rods (544) are installed between the outer wall of the material guide cylinder (540) and the corresponding inner wall of the conical screening frame.

9. The basalt fiber raw material processing vibrating screen according to claim 3, characterized in that: The upper end of the material guiding cylinder (540) is a funnel structure with a gradually increasing opening diameter and connected to a corresponding conical screening frame.

10. A basalt fiber raw material processing vibration screening method, which is completed by using a basalt fiber raw material processing vibration screen as claimed in claim 3, characterized in that: The following steps are involved: S1, feed diversion: the raw material is poured from the top of the four-sided conical screen (50) into the space between the four-sided conical screen (50) and the four-sided conical cover (51), and the top of the four-sided conical screen (50) diverts the raw material so that the raw material enters between four opposite surfaces of the four-sided conical screen (50) and the four-sided conical cover (51); S2, multi-stage screening: when the raw material is poured from the top of the four-sided cone screen (50), the top screening hole of the four-sided cone screen (50) performs primary screening on the raw material; after the primary screening is completed, the rotating shaft (561) at the primary screening location drives the baffle (562) to rotate, thereby opening the primary screening area, allowing the raw material to enter the secondary screening area, and the secondary screening area performs secondary screening on the raw material; After the secondary screening is completed, the rotating shaft (561) at the secondary screening area drives the baffle (562) to rotate to open the secondary screening area and discharge the raw materials into the tertiary screening area. After the tertiary screening is completed, the rotating shaft (561) at the tertiary screening area drives the baffle (562) to rotate to open the tertiary screening area so that the remaining raw materials with the largest particles are discharged from the rectangular discharge port (52). S3, classified discharge: a plurality of guide cylinders (540) arranged in sequence from top to bottom gather and discharge the raw materials of the first-stage screening, the second-stage screening, and the third-stage screening in sequence, and then collect them at the lower end of each discharge pipe (541).

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