Basalt split screening device and screening method

Abstract

The present application relates to the technical fields of screening separation, and especially relates to a basalt split screening device and a screening method, which comprises a rack, a feeding hopper arranged on the rack, a screening assembly arranged in the feeding hopper, the screening assembly comprising parallel arranged chain structures, chain net structures arranged between the chain structures and transmission structures, the chain net structure comprising a plurality of movably connected net buckles, gaps between the plurality of net buckles serving as screen holes, and the screening assembly being used to realize the movement between the net buckles through the transmission structures to complete the screening process; the rotation movement of a motor is converted into the reciprocating movement of the net buckles through the use of a cam and a screening rod, and through this movement, the screen holes are constantly changed in the screening process; the chain rods are further arranged through the net buckles and connected with the chain structures, the stability and the movement coordination of the chain net structure are increased, and the uniformity of the screen hole change is ensured; and thus the problem of powder blockage of the fixed screen, the vibrating screen and other structures in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of screening and separation technology, and in particular to a basalt separation screening device and screening method. Background Technology

[0002] Continuous basalt fiber (CBF) is the most cost-effective alternative to most high-strength glass fiber, aramid fiber, and carbon fiber products, and it is made from natural basalt.

[0003] In the preparation of continuous basalt fiber, the preceding processes include: crushing basalt matrix, then magnetically separating the powder and mixing it evenly into a silo. In the above process, magnetic separators are commonly used for screening. However, since the particle size of the crushed powder is not uniform, conventional fixed-size screens often experience clogging of the screen holes during screening, resulting in reduced screening efficiency. Even when using devices such as vibrating screens for separate screening, irregular powder particles can still cause clogging. Summary of the Invention

[0004] The main objective of this invention is to provide a basalt separation screening device and screening method, which aims to solve the problem of screen hole clogging in the existing fixed screen technology.

[0005] To achieve the above objectives, the present invention provides a basalt separation screening device, comprising a frame, a feed hopper on the frame, and a screening component inside the feed hopper. The screening component includes a parallel chain structure, a chain mesh structure disposed between the chain structures, and a transmission structure. The chain mesh structure includes several movably connected mesh clips, the gaps between the mesh clips serving as sieve holes. The screening component is used to complete the screening process by realizing the movement between the mesh clips through the transmission structure.

[0006] Optionally, the chain mesh structure further includes chain rods passing through the mesh buckles, with both ends of the chain rods passing through the chain structure. The transmission structure includes a fixed plate, several transmission rods, and several screening rods. The fixed plate is fixedly connected to the inside of the feed hopper. The several transmission rods are rotatably mounted on the fixed plate. The screening rods are slidably mounted inside the fixed plate. Each transmission rod is provided with a cam. One end of the screening rod is connected to the chain rod, and the other end of the screening rod is always in contact with the cam.

[0007] Optionally, the frame is also provided with a batching hopper and a mixing component, and the feeding hopper is connected to the batching hopper and the mixing component. The upper end of the mixing component is provided with a weighing structure and a feeding structure, and the lower end of the mixing component is provided with a discharge port.

[0008] Optionally, the screening rod is provided with a slot, the fixed plate is provided with a movable hole, a limiting pin that cooperates with the slot is provided in the movable hole, and a return spring is provided on the outer periphery of the screening rod, with the two ends of the return spring abutting against the fixed plate and the screening rod respectively.

[0009] Optionally, a material dispensing port is provided on one side of the screening component, and a magnetic coil is provided inside the feeding hopper.

[0010] Optionally, the initial position of the cam in the transmission structure has an angular difference, and the minimum angular difference is 45°.

[0011] Optionally, the chain structure includes an outer link and an inner link that move at intervals, with the link moving through the inner link.

[0012] Optionally, four adjacent chain links form a screening unit, and the angle difference between the initial positions of the corresponding cams within the screening unit is 90° and extends along the direction of the chain structure. When the cam is at the midpoint of its stroke, the lower end face of the inner chain link is horizontal.

[0013] A screening method includes the following steps: after starting the screening device, crushed basalt powder is fed into the feed hopper, and the screening process of basalt powder is completed through the sieve holes of the screening component.

[0014] Optionally, the screening process specifically includes: the mesh buckles within the chain mesh structure move through a transmission structure, and the mesh buckles in motion act as sieve holes to screen the basalt powder. Powder that does not meet the sieve hole size requirement is discharged through the movement of the mesh buckles, thus completing the screening process.

[0015] This invention proposes a basalt separation screening device and method. A chain-mesh structure is formed by movable mesh buckles, with the screen openings created by the gaps between the buckles. Under the action of a transmission structure, the buckles can move, changing the gap size. By using a cam and a screening rod, the rotational motion of the motor is converted into the reciprocating motion of the buckles. Through this motion, the screen openings continuously change during the screening process. Furthermore, a chain rod passes through the buckles and connects to the chain structure, increasing the stability and coordination of the chain-mesh structure and ensuring the uniformity of the screen opening changes. This solves the problem of powder clogging in existing fixed screens and vibrating screens. It achieves dynamic screen openings by periodically adjusting the gaps to actively "squeeze out" clogged powder, maintaining screening continuity and stability. The dynamic changes in the screen openings accelerate powder passage, significantly increasing the throughput per unit time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an axial view of the screening device of the present invention; Figure 2This is another axial view of the screening device of the present invention; Figure 3 This is a front view of the screening device of the present invention; Figure 4 This is a schematic diagram of the structure of the screening component of the present invention; Figure 5 This is a partial structural diagram of the screening component of the present invention; Figure 6 This is a structural diagram of the fixed plate; Figure 7 This is a schematic diagram of a chain structure; Figure 8 This is a schematic diagram of the cooperation structure between the transmission rod and the cam in this invention; Figure 9 This is a schematic diagram of the chain network structure of the present invention; Figure 10 This is a schematic diagram of the structure of the screening rod of the present invention.

[0017] Figure label: 1-Frame, 2-Feed hopper, 3-Screening assembly, 4-Battery hopper, 5-Mixing assembly, 6-Distribution port; 51 - Feeding structure; 52 - Discharge port; 31-Chain structure; 311 - Outer link, 312 - Inner link; 32-Chain network structure; 321-Net buckle, 322-Chain rod; 33-Transmission structure; 331-Fixed plate, 332-Transmission rod, 333-Screening rod, 334-Cam, 335-Slot, 336-Modible hole, 337-Limit pin, 338-Reset spring.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] Example 1: Please refer to the attached document as well. Figures 1 to 10 Embodiment 1 of the present invention provides a basalt split screening device, including a frame 1, a feeding hopper 2 on the frame 1, a screening component 3 inside the feeding hopper 2, the screening component 3 including a chain structure 31 arranged in parallel, a chain mesh structure 32 disposed between the chain structures 31, and a transmission structure 33, the chain mesh structure 32 including a plurality of movably connected mesh buckles 321, the gap between the plurality of mesh buckles 321 serving as sieve holes, the screening component 3 being used to complete the screening process by realizing the movement between the mesh buckles 321 through the transmission structure 33.

[0024] When existing vibrating screens and similar devices perform split screening, irregular basalt powder easily gets clogged in the fixed-size screen holes, significantly affecting screening efficiency. To address this issue, the applicant has improved the traditional fixed screen by replacing it with several movable mesh clips 321. Figure 9 As shown, each mesh buckle 321 is interlocked to form a chain mesh structure 32. It can be understood that the gaps between the mesh buckles 321 can act as sieve holes. When the chain mesh structure 32 is subjected to external force, the gaps between the mesh buckles 321 will change significantly. When basalt powder clogs the sieve holes, the external force brought by the transmission structure 33 will cause the entire chain mesh structure 32 to dynamically change. For example, the mesh buckles 321 around the sieve holes where clogging occurs can still be displaced, thereby enlarging the sieve holes to solve the clogging problem of basalt powder on the sieve holes. In this process, the maximum gap between the mesh buckles 321 is less than the minimum particle size to be screened. It can also be understood that the transmission structure 33 in this embodiment can be a vibrating screen in the prior art, and the screening components 3 are directly installed on the vibrating screen to solve the problem of sieve hole clogging caused by fixed screens. The chain structure 31 serves as a connecting and supporting structure between the screening components 3 and can produce corresponding angle changes.

[0025] In this embodiment, the following preferred structure also exists. Specifically, the chain mesh structure 32 further includes chain rods 322 passing through the mesh buckles 321. Both ends of the chain rods 322 pass through the chain structure 31. The transmission structure 33 includes a fixed plate 331, a plurality of transmission rods 332, and a plurality of screening rods 333. The fixed plate 331 is fixedly connected to the inner side of the feed hopper 2. The plurality of transmission rods 332 are rotatably disposed on the fixed plate 331. The screening rods 333 are slidably disposed within the fixed plate 331. Each transmission rod 332 is provided with a cam 334. One end of the screening rod 333 is connected to the chain rod 322, and the other end of the screening rod 333 is always in contact with the cam 334.

[0026] It should be noted that since the chain mesh structures 32 are interconnected via mesh clips 321, the flexible chain structure 31 still lacks a corresponding skeletal structure. During the screening of basalt powder, the powder structure tends to aggregate at the center of the chain mesh structure 32. Therefore, the chain rod 322 is connected to the chain structure 31 after passing through the mesh clips 321. It is understood that a motor is installed on the frame 1, serving as the power source for the screening operation. The motor's output is preferably connected to the gears on the transmission rod 332 via a reducer or similar structure, such as chain drive. When the motor starts, the transmission rod 332 rotates on the fixed plate 331 via the toothed chain, and the cam 334 fixedly connected to the transmission rod 332 rotates synchronously. In addition, the screening rod 333, which is slidably connected in the fixed plate 331, reciprocates through the cam 334. The reciprocating movement is reset by the pressure of the chain mesh structure 32 and the basalt powder on the screening rod 333. Based on the relative movement between the mesh buckles 321 of the chain mesh structure 32, the motor drives the rotation of the cam 334 in the transmission structure 33 to realize the reciprocating movement of the screening rod 333. Then, the reciprocating movement of the screening rod 333 drives the reciprocating movement of the chain rod 322, thereby stably realizing the relative movement between the mesh buckles 321, that is, the screening process of the basalt powder.

[0027] It should also be noted that the overall structure described above involves the transmission structure 33 causing the chain mesh structure 32 to move irregularly in a three-dimensional environment, rather than a traditional fixed screen or vibrating screen. Through the synergistic effect of the dynamic chain mesh structure 32 and the cam 334-screening rod 333 transmission system, the problems of easy clogging and poor adaptability of traditional fixed screens in basalt powder screening are solved. Specifically, the chain mesh structure 32 consists of movable mesh clips 321, whose gaps form dynamic screen holes. The cam 334 in the transmission structure 33 drives the screening rod 333 to reciprocate, causing the chain rod 322 and mesh clips 321 to periodically adjust the size of the screen hole gaps, actively breaking up powder blockages. The rigid connection between the chain structure 31 and the chain rod 322 ensures the uniformity of the screen hole changes, while the return spring 338 and the limit pin 337 ensure the precise reset of the screening rod 333, reducing mechanical wear. It achieves adaptive adjustment of sieve aperture, significantly improving screening efficiency and continuity, while flexibly adapting to the needs of powders with different particle sizes, and enhancing the stability and durability of equipment operation through structural optimization.

[0028] Example 2: As an optional implementation, the frame 1 is also provided with a batching hopper 4 and a mixing component 5, and the feeding hopper 2 is connected to the batching hopper 4 and the mixing component 5. The upper end of the mixing component 5 is provided with a weighing structure and a feeding structure 51, and the lower end of the mixing component 5 is provided with a discharge port 52.

[0029] In this embodiment, a material dispensing port 6 is provided on one side of the screening component 3, and a magnetic coil is provided inside the feeding hopper 2.

[0030] It should be noted that in the preparation process of continuous basalt fiber, the crushed basalt powder needs to be magnetically separated and screened before batching. In the existing process, this is accomplished by different equipment, which greatly increases the complexity of the process. Based on the above structure, the applicant proposes to integrate the screening device and the batching device in this embodiment. This is achieved by adding a batching hopper 4 connected to the feed hopper 2 on the frame 1. Both the feed hopper 2 and the mixing hopper are connected to the mixing component 5. For the feeding structure 51, its preferred structure is a controllable valve, such as a pneumatic butterfly valve or a rotary valve, installed in the feed channel of the mixing component 5. The load-bearing structure is preferably a mass sensor, which is installed inside the controllable valve. It can also be a flow meter, volume meter, etc. In one screening process, the screened basalt powder stops screening after reaching the mass threshold through the weighing structure, and is then fed into the batching hopper 4 to complete the mixing process in the mixing component 5. In this process, basalt powder can be fed into the mixing component 5 first through the feeding structure 51, and then the batching can be weighed by the weighing structure and fed into the mixing component 5.

[0031] It should also be noted that by integrating the batching hopper 4, mixing component 5, and magnetic coil, the problems of inaccurate raw material ratio, uneven mixing, and magnetic impurities in the basalt powder screening process are solved. Specifically, the batching hopper 4 is connected to the mixing component 5, and the raw material ratio is precisely controlled through a weighing structure. The feeding structure 51 realizes automated feeding, ensuring uniform material mixing. The magnetic coil installed in the feeding hopper 2 can pre-adsorb ferromagnetic impurities in the basalt powder, preventing impurities from entering subsequent processes and causing equipment wear or finished product contamination. Combined with the attached... Figure 1 The material distribution port 6 on one side of the screening component 3 classifies and collects powders of different particle sizes after screening, improving material management efficiency. This embodiment optimizes the raw material pretreatment and post-treatment processes, achieving precise proportioning, efficient removal of impurities, and orderly sorting of post-screening materials, significantly improving the raw material purity and process stability of continuous basalt fiber preparation.

[0032] For the mixing component 5, its preferred structure is a pneumatic fluidizing mixer or a ribbon mixer, etc.

[0033] Example 3: As an optional implementation, the screening rod 333 is provided with a slot 335, the fixing plate 331 is provided with a movable hole 336, a limiting pin 337 that cooperates with the slot 335 is provided in the movable hole 336, and a return spring 338 is provided on the outer periphery of the screening rod 333, with the two ends of the return spring 338 abutting against the fixing plate 331 and the screening rod 333 respectively.

[0034] Based on the above structure, unlike the sliding process of the screening rod 333 on the fixed plate 331 in the previous embodiment, the screening rod 333 in this embodiment can be deflected at an angle along the side of the fixed plate 331 through structures such as the slot 335 and the limiting pin 337. Its movement process can be understood as the swinging of the two ends of the screening rod 333. Since one end of the screening rod 333 is always in contact with the cam 334 through the return spring 338, the other end will manifest as the movement of the chain rod 322 and the chain structure 31. By setting the slot 335 on the screening rod 333, setting the limiting pin 337 on the fixed plate 331 to cooperate with the slot 335, and setting the return spring 338 on the outer periphery of the screening rod 333, the range of motion between the mesh buckles 321 is increased, and the problem of stability and accuracy of the movement of the screening rod 333 during the screening process is solved. Specifically, when the screening rod 333 reciprocates under the action of the transmission structure 33, the cooperation between the slot 335 and the limiting pin 337 allows the screening rod 333 to deflect at an angle along the side of the fixed plate 331. This deflection not only increases the range of motion of the screening rod 333, but also enables the screening rod 333 to more effectively drive the chain rod 322 and the mesh buckle 321 to make periodic adjustments during the movement, thereby realizing the dynamic change of the screen hole gap. At the same time, the setting of the return spring 338 ensures that the screening rod 333 can accurately return to its original position after completing one reciprocating motion, reducing mechanical wear and improving the stability and durability of the equipment. Through this structural design, the adaptive adjustment of the screen hole is realized, significantly improving the screening efficiency and continuity, while flexibly adapting to the needs of powders with different particle sizes, further optimizing the screening process, and ensuring the stability and reliability of the screening effect.

[0035] Example 4: As an optional implementation, the initial position of the inner cam 334 of the transmission structure 33 has an angular difference, and the minimum angular difference is 45°.

[0036] It should be noted that in the above structure, due to the angular difference in the initial position of the cam 334 within the transmission structure 33, the chain rod 322 will generate irregular oscillations during its movement. This irregular movement causes the size and shape of the screen holes to continuously change during the screening process, further enhancing the self-cleaning ability of the screen holes. Specifically, when the screen holes become clogged, the irregular movement of the chain rod 322 can generate additional impact force, helping to loosen and expel the clogged powder, thereby reducing the risk of screen hole clogging. In addition, the irregular movement can also cause the screen holes to change in different directions, increasing the chance of powder passing through the screen holes and improving the uniformity and accuracy of screening. This irregular movement can also adapt to powders of different particle sizes, ensuring the flexibility and adaptability of the screening process.

[0037] Example 5: As an optional implementation, the chain structure 31 includes an outer link 311 and an inner link 312 that move at intervals in sequence, with the chain rod 322 moving through the inner link 312.

[0038] In this embodiment, four adjacent chain links 322 form a screening unit. The angle difference between the initial positions of the corresponding cams 334 within the screening unit is 90° and extends along the direction of the chain structure 31. When the cam 334 is at the midpoint of its stroke, the lower end face of the inner chain link 312 is horizontal.

[0039] It should be noted that, based on the above structure, in solving the problem of screen hole clogging in existing screens, the technical solution in this embodiment also addresses the problem of discharging powder that cannot pass through the screen holes, that is, simultaneously achieving powder separation while avoiding screen hole clogging. Specifically, the above structure enables the chain mesh structure 32 to form a wave-like motion during transmission, thereby achieving dynamic adjustment of the screen holes, effectively preventing powder clogging in the screen holes, and improving screening efficiency and continuity. More specifically, the wave-like motion causes the screen holes to continuously change during the screening process, which not only actively "squeezes out" the clogged powder, but also accelerates the speed at which the powder passes through the screen holes, significantly increasing the processing volume per unit time, while ensuring the uniformity of screen hole changes and improving the stability of screening quality.

[0040] Furthermore, the wave-like motion increases the dynamic range of the screen apertures, allowing them to be adjusted in different directions and angles, further improving the self-cleaning ability of the screen apertures and reducing the risk of screen clogging. Secondly, this motion mode enables the chain mesh structure 32 to generate more vibration and impact during the screening process, which helps to loosen and separate the powder adhering to the screen apertures, further improving the screening efficiency and accuracy. In addition, the wave-like motion also enables the screen apertures to form different screening paths during the screening process, increasing the contact opportunities between the powder and the screen apertures, and improving the uniformity and consistency of the screening.

[0041] Example 6: As an optional implementation, a screening method is provided, comprising the following steps: after starting the screening device, the crushed basalt powder is fed into the feed hopper 2, and the screening process of the basalt powder is completed through the sieve holes of the screening component 3.

[0042] In this embodiment, the screening process specifically includes: the mesh buckle 321 in the chain mesh structure 32 moves through the transmission structure 33, and the mesh buckle 321 in the movement process acts as a sieve hole to screen the basalt powder. The powder that does not meet the sieve hole size is discharged through the movement of the mesh buckle 321 to complete the screening process.

[0043] The overall screening process can be divided into a feeding stage, a screening stage, a separating stage, and a mixing stage. In the feeding stage, the crushed basalt powder enters the screening device through the feeding hopper 2. A magnetic coil is installed inside the feeding hopper 2 to pre-adsorb ferromagnetic impurities in the powder, preventing them from entering subsequent processes. This step can refer to existing magnetic separators. In the screening stage, the powder enters the screening assembly 3, which includes a parallel chain structure 31, a chain mesh structure 32, and a transmission structure 33. The chain mesh structure 32 consists of several movably connected mesh clips 321, with the gaps between the mesh clips serving as screen holes. The transmission structure 33 converts the rotational motion of the motor into the reciprocating motion of the mesh clips 321 via a cam 334 and a screening rod 333, causing the screen holes to continuously change during the screening process. The chain rod 322 passes through the mesh clips 321 and connects to the chain structure 31, increasing the stability and coordination of the chain mesh structure 32, thus realizing the process of screening basalt powder that meets the particle size requirements to the mixing assembly 5. During the separation stage, the mesh buckle 321 moves via the drive of the transmission structure 33. The sieve openings continuously change during this movement, actively "squeezing out" any blocked powder. For example, the chain mesh structure 32 moves in a wave-like motion, conveying the material on it to the distribution port 6 to maintain the continuity and stability of the screening process. Powder that does not meet the sieve opening size requirements is discharged through the movement of the mesh buckle 321, completing the screening. During the blending stage, the screened basalt powder enters the mixing component 5 through the distribution port 6. The upper end of the mixing component 5 is equipped with a weighing structure and a feeding structure 51. The feeding structure 51 feeds the powder into the mixing component 5, and the weighing structure weighs the ingredients and then feeds them into the mixing component 5, completing the mixing process. The lower end of the mixing component 5 is equipped with a discharge port 52, through which the mixed powder is discharged.

[0044] It should also be noted that during the screening process described above, the transmission rod 332 is rotated by a reducer or similar structure, and the cam 334 on the transmission rod 332 rotates synchronously. The cam 334 drives the screening rod 333 to reciprocate, which in turn drives the chain rod 322 to reciprocate, thus causing relative motion in the mesh 321. The screen holes change continuously during this motion. When the transmission rod 332 rotates, the cam 334 rotates synchronously, driving the screening rod 333 to reciprocate. One end of the screening rod 333 is connected to the chain rod 322, and the other end abuts against the cam 334. The reciprocating movement of the screening rod 333 is achieved by the rotation of the cam 334. Under the action of the transmission structure 33, the screening rod 333 reciprocates. Through the cooperation of the slot 335 and the limiting pin 337, the screening rod 333 can deflect at an angle along the side of the fixed plate 331. The reciprocating motion of the screening rod 333 drives the chain rod 322 to reciprocate, thus causing a larger range of relative motion in the mesh 321.

[0045] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A basalt separation and screening device, comprising a frame, characterized in that, The frame is provided with a feeding hopper, and the feeding hopper is provided with a screening component. The screening component includes a chain structure arranged in parallel, a chain mesh structure arranged between the chain structures, and a transmission structure. The chain mesh structure includes a number of movably connected mesh buckles, and the gap between the mesh buckles serves as a sieve hole. The screening component is used to realize the movement between the mesh buckles through the transmission structure to complete the screening process. The chain mesh structure also includes a chain rod passing through the mesh buckle, with both ends of the chain rod passing through the chain structure. The transmission structure includes a fixed plate, several transmission rods, and several screening rods. The fixed plate is fixedly connected to the inside of the feed hopper. Several transmission rods are rotatably mounted on the fixed plate. The screening rods are slidably mounted inside the fixed plate. Each transmission rod is provided with a cam. One end of the screening rod is connected to the chain rod, and the other end of the screening rod is always in contact with the cam. The screening rod is provided with a slot, the fixed plate is provided with a movable hole, a limiting pin that cooperates with the slot is provided in the movable hole, and a return spring is provided on the outer periphery of the screening rod, with the two ends of the return spring abutting against the fixed plate and the screening rod respectively.

2. The basalt separation and screening device as described in claim 1, characterized in that, The frame is also equipped with a batching hopper and a mixing component, and the feeding hopper is connected to the batching hopper and the mixing component. The upper end of the mixing component is equipped with a weighing structure and a feeding structure, and the lower end of the mixing component is equipped with a discharge port.

3. The basalt separation and screening device as described in claim 2, characterized in that, The screening component has a material dispensing port on one side, and a magnetic coil is installed inside the feeding hopper.

4. The basalt separation and screening device as described in claim 1, characterized in that, The initial position of the cam in the transmission structure has an angular difference, and the minimum angular difference is 45°.

5. The basalt separation and screening device as described in claim 1, characterized in that, The chain structure includes outer links and inner links that move at intervals, with the chain rod moving through the inner link.

6. The basalt separation and screening device as described in claim 5, characterized in that, Four adjacent links form a screening unit. The angle difference between the initial positions of the corresponding cams within the screening unit is 90° and extends along the direction of the chain structure. When the cam is at the midpoint of its stroke, the lower end face of the inner link is horizontal.

7. A screening method, characterized in that, A basalt splitting screening device according to any one of claims 2 to 6 includes the following steps: after starting the screening device, the crushed basalt powder is fed into the feed hopper, and the screening process of the basalt powder is completed through the sieve holes of the screening component.

8. The screening method as described in claim 7, characterized in that, The screening process specifically includes: the mesh buckles within the chain mesh structure move through a transmission structure, and the mesh buckles, acting as sieve holes, screen the basalt powder. Powder that does not meet the sieve hole size requirement is discharged through the movement of the mesh buckles, thus completing the screening process.

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