A feeding machine for raw material supply of a sand screening machine

Abstract

The application discloses a kind of sand screening machine raw material feeding with feeding machine, belong to sand screening machine auxiliary equipment technical field, including feeding bin, vibration drive unit is installed in the outer side of feeding bin, and feeding bin has feeding cavity, further comprising: vibration strip, multiple vibration strip arrays are arranged in the bottom side of the feeding cavity of the feeding bin, and multiple vibration strips have gap for accommodating material passing between them.In the application, the cross section of the vibration strip is designed in a circular shape, which cooperates with the loading block and the receiving part set at the front end of the interior, can realize the coupling of counterweight, effectively absorb the huge impact force when large block material falls, avoid equipment distortion, the vibration strip is divided into contact part and connecting part, and the protruding part and the pressing strip are used to realize the detachable installation with the mounting seat, even if a single vibration strip is worn or damaged, it can also be independently and quickly replaced, which greatly reduces the maintenance cost.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary equipment for sand screening machines, and particularly relates to a feeder for supplying raw materials to a sand screening machine. Background Technology

[0002] This invention relates to the field of screening equipment technology, and more specifically, to a feeder for supplying raw materials to a sand screening machine. Sand screening machines are indispensable aggregate grading equipment in industries such as construction, mining, metallurgy, and building materials. To ensure that the sand screening machine can perform screening operations efficiently and continuously, a feeder is usually installed at its front end to uniformly and quantitatively transport sand and gravel raw materials into the sand screening machine.

[0003] However, existing sand screening machine feeders still have the following technical defects in practical applications: poor impact resistance and high maintenance costs. When sand and gravel raw materials are poured into the feeding bin by a loader or hopper, they have a huge falling impact force. Traditional vibrating feeding surfaces are mostly rigid integrated structures. They are prone to twisting, deformation or even breakage when subjected to the eccentric impact of heavy-load large materials for a long time. Once a part is damaged, it often needs to be replaced as a whole, resulting in high maintenance costs. After some fine particles pass through the gaps between the vibrating bars, they often slide down naturally by gravity. Due to the lack of effective excitation guidance for the bottom dead zone, fine materials are very likely to remain and accumulate in the dead corners of the bottom installation, ultimately interfering with the normal transmission of the upper excitation space and reducing the overall operating stability of the equipment. There is room for improvement. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of fine materials easily remaining and accumulating in the dead corners of the bottom installation due to the lack of effective vibration guidance for the bottom dead zone, and to propose a feeder for raw material supply of a sand screening machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A feeder for supplying raw materials to a sand screening machine includes a feeding bin, a vibration drive unit installed on one side of the outer side of the feeding bin, and a feeding cavity inside the feeding bin. It also includes: Vibrating bars, an array of multiple vibrating bars is arranged on the bottom side of the feeding cavity of the feeding bin, and there are gaps between the multiple vibrating bars to accommodate the passage of material; The mounting base is installed at the bottom of the inner cavity of the feeding hopper, and the vibrating strip is installed on the top of the mounting base. The vibration of the mounting base is transmitted to multiple vibrating strips through the vibration drive unit to vibrate and feed the material. The vibration amplification mechanism is installed inside the cavity of multiple vibrating bars to amplify the vibration intensity. A guiding mechanism is installed on the top of the mounting base, and the material is guided to be discharged from the gap between the vibrating bars.

[0006] As a further description of the above technical solution: The vibration bar includes: The contact part is used to contact the falling material. The contact part has a cavity, and the vibration is transmitted through the vibration amplification mechanism assembled in the cavity. The connecting part is integrally connected to the bottom of the contact part. Both sides of the bottom of the connecting part have protrusions at the positions where they contact the mounting base. The protrusions are installed on the top of the mounting base by pressure strips.

[0007] As a further description of the above technical solution: The cross-sectional shape of the contact portion is one of a circle, an inverted trapezoid, and a semi-circular arc.

[0008] As a further description of the above technical solution: The vibration amplification mechanism includes: Vibration rods, multiple vibration rods are inserted into the vibration bar, and the multiple vibration rods are expandably connected by screws and threaded grooves; Multiple loading blocks are arranged in an array along the axis of the vibrating rod outside the vibrating rod. Multiple loading blocks are located at the feeding end of the feeding hopper. The counterweight coupling is achieved by the abutment of the loading blocks with the inner wall of the vibrating bar. Multiple polarization blocks are arranged in an array along the axis of the vibrating rod outside the vibrating rod, with multiple polarization blocks located on the rear side of the feeding hopper.

[0009] As a further description of the above technical solution: The polarizing block has a teardrop-shaped cross-section, including a relatively wide base and a protrusion that extends radially outward from the base and gradually narrows. The base is provided with an eccentrically arranged circular mounting hole and is mounted on the outside of the vibrating rod through the circular mounting hole. The protrusions of the two rows of polarizing blocks outside two adjacent vibrating rods extend in a predetermined angle in the circumferential direction.

[0010] As a further description of the above technical solution: The vibration amplification mechanism also includes: A connecting sleeve is fitted over the outside of the vibrating rod; The excitation part is connected to the outside of the connecting sleeve. The excitation part includes a plurality of guide plates that surround the outside of the connecting sleeve. The cross-sectional shape of the guide plates is wavy.

[0011] As a further description of the above technical solution: The guiding mechanism includes: The guide channel, with multiple guide channels arrayed in the channel body opened at the top of the mounting base, has a cavity inside, through which materials are guided out. The guide plate is rotatably connected to the guide groove via a rotating sleeve. The guide plate is set at an inclined angle in the guide groove. When the material falls from between adjacent vibrating bars, it is guided by vibration through the inclined guide plate in the guide groove.

[0012] As a further description of the above technical solution: The guiding mechanism also includes: A guide block, multiple guide blocks are arranged in an array along the length of the inner cavity of the guide groove. The guide block is located at the bottom of the guide plate. A limit bolt is provided on one side of the guide block. The limit bolt is limited and connected to the through groove opened outside the guide groove.

[0013] As a further description of the above technical solution: It also includes a blocking block, the front side of which is inclined, and the side of the blocking block closest to the guide plate is at an angle. One side of the blocking block has a slot, and the blocking block is fitted onto the front side of the guide plate through the slot.

[0014] As a further description of the above technical solution: The multi-level energy application mechanism includes: A fixing block is connected to the inner wall of the feeding bin. A conductive strip, with multiple conductive strip arrays disposed on one side of the fixed block, extends to the top side of the guide mechanism at the corresponding position, and conducts vibration through the conductive strip.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, the cross-section of the vibrating bar adopts a circular design. Combined with the loading block and receiving part set at the front end of the interior, it can achieve counterweight coupling, effectively absorb the huge impact force when large pieces of material fall, and avoid the twisting and deformation of the equipment. The vibrating bar is divided into a contact part and a connecting part. It can be detachably installed with the mounting base through the protrusion and the pressure strip. Even if a single vibrating bar is worn or damaged, it can be replaced independently and quickly, which greatly reduces the maintenance cost.

[0016] 2. In this invention, teardrop-shaped polarization blocks are arrayed in the rear section of the vibrating rod, and the polarization blocks on adjacent vibrating rods are arranged at a preset angle. Under the action of vertical excitation force, the eccentric center of gravity generates an additional load torque, which transforms the single linear jump into a composite vibration of up-and-down and slight left-and-right swaying. The reverse torsional stress generated between adjacent components forms a scissor effect, which can strongly peel off the jammed material, completely solve the material jamming problem, and greatly improve the conveying stability.

[0017] 3. In this invention, by sleeved with a wave-shaped guide plate on the outside of the vibrating rod, not only is the compressive strength of the connection position enhanced, but also creeping fluctuations are generated in the feeding direction to form torsional micro-vibration, which effectively breaks up agglomerated materials and improves the transportation and distribution efficiency at the end of the feeder.

[0018] 4. In this invention, a dedicated guiding mechanism and a multi-stage energy application mechanism are configured for fine materials falling through the gap of the self-vibrating bar. The inclined guide plate at the bottom can achieve efficient conveying of fine materials under the resonant excitation of the bottom guide block. The design of the blocking block completely eliminates the backflow of materials into the excitation gap. Combined with the side wall conduction strip, the superimposed energy application to the material accumulation area ensures the complete discharge of materials and maintains the cleanliness and smooth conduction of the excitation space. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a feeder for supplying raw materials to a sand screening machine according to the present invention. Figure 2 The present invention proposes Figure 1 Enlarged structural diagram of part A in the middle; Figure 3 This is a schematic diagram of the vibrating bar arrangement structure of a feeder for raw material supply of a sand screening machine proposed in this invention; Figure 4 The present invention proposes Figure 3 Enlarged structural diagram of section B; Figure 5 The present invention proposes Figure 3 Enlarged structural diagram of section C; Figure 6 This is a schematic diagram of the guiding mechanism of a feeder for supplying raw materials to a sand screening machine, as proposed in this invention. Figure 7 This is a schematic diagram of the guiding mechanism of a feeder for supplying raw materials to a sand screening machine, as proposed in this invention. Figure 8 This is a top-view structural diagram of a feeder for supplying raw materials to a sand screening machine, as proposed in this invention. Figure 9 The present invention proposes Figure 8 Enlarged structural diagram of section E in the middle; Figure 10 This is a schematic diagram of the transverse assembly structure of the vibrating bar of the feeder for raw material supply of a sand screening machine proposed in this invention; Figure 11 The present invention proposes Figure 10 A magnified structural diagram of part D in the middle.

[0020] Legend: 1. Feeding bin; 2. Vibration drive unit; 3. Vibration bar; 4. Vibration amplification mechanism; 401. Vibration rod; 402. Loading block; 403. Receiving part; 404. Screw seat; 405. Guide cone sleeve; 406. Adjusting screw; 407. Polarizing block; 408. Screw; 409. Connecting sleeve; 410. Excitation part; 5. Guiding mechanism; 501. Guide groove; 502. Through groove; 503. Guide plate; 504. Sealing block; 505. Guide block; 506. Limiting bolt; 507. Rotating sleeve; 6. Multi-stage energy application mechanism; 601. Fixing block; 602. Conducting bar; 7. Pressure bar; 8. Mounting base. Detailed Implementation

[0021] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-11 The present invention provides a technical solution: a feeder for supplying raw materials to a sand screening machine, including a feeding bin 1, a vibration drive unit 2 installed on one side of the outside of the feeding bin 1, and a feeding cavity inside the feeding bin 1; It also includes a vibration bar 3, a mounting base 8, a vibration amplification mechanism 4, and a guiding mechanism 5. Multiple vibrating bars 3 are arranged in an array on the bottom side of the feeding cavity of the feeding bin 1, and there are gaps between the multiple vibrating bars 3 to accommodate the passage of materials; The mounting base 8 is installed at the bottom of the inner cavity of the feeding bin 1, and the vibrating strip 3 is installed on the top of the mounting base 8. The vibration of the mounting base 8 is transmitted to multiple vibrating strips 3 through the vibration drive unit 2 to vibrate and feed materials. The vibration amplification mechanism 4 is installed in the cavity of multiple vibration bars 3, and the vibration intensity is amplified by the vibration amplification mechanism 4. The guiding mechanism 5 is installed on the top of the mounting base 8, and the material is guided to be discharged from the gap of the vibrating bar 3 through the guiding mechanism 5. The vibrating strip 3 includes a contact part and a connecting part; The contact part is used to contact the falling material. The contact part has a cavity, and the vibration is transmitted through the vibration amplification mechanism 4 assembled in the cavity. The connecting part is integrally connected to the bottom of the contact part. Both sides of the bottom of the connecting part have protrusions at the positions where they contact the mounting base 8. The protrusions are installed on the top of the mounting base 8 by pressure strips 7. In one embodiment of this application, the cross-sectional shape of the contact portion is circular. In another embodiment, the contact portion may be an inverted trapezoid or a semi-circular arc. When existing feeders are subjected to a large instantaneous dump of material from a loader, the rigid screen bars are prone to irreversible plastic deformation due to the instantaneous heavy load impact. Specifically, the vibrating bars 3 arranged in an array have an arc-shaped contact part, which firstly achieves tangential sliding buffering of the material in terms of physical morphology. More importantly, the material drop area at the front end of the contact part is equipped with a loading block 402 and a receiving part 403. When the falling material generates huge impact kinetic energy, the contact between the loading block 402 and the inner wall of the vibrating bar 3 can perform counterweight coupling, dispersing the concentrated transient impact force and converting it into the axial and radial micro-strain energy of the vibrating rod 401, achieving the energy absorption effect of overcoming rigidity with flexibility. The vibrating bar 3 adopts a split protrusion and detachable pressure bar 7 structure, avoiding the problem of needing to replace the entire machine once the integral screen plate is partially damaged, and realizing low-cost, modular and quick replacement of individual vibrating bars 3.

[0023] Please see Figures 3-5 The vibration amplification mechanism 4 includes a vibration rod 401, a loading block 402, and a polarization block 407; Multiple vibrating rods 401 are inserted into the vibrating bar 3, and the multiple vibrating rods 401 are connected in an expandable manner through screws 408 and threaded grooves; Multiple loading blocks 402 are arranged in an array along the axis of the vibrating rod 401 outside the vibrating rod 401. Multiple loading blocks 402 are located at the feeding end of the feeding bin 1, and counterweight coupling is achieved through the contact between the loading blocks 402 and the inner wall of the vibrating bar 3. The loading block 402 has receiving parts 403 on both sides of its top, which absorb the impact of falling material. Multiple polarization blocks 407 are arranged in an array along the axis of the vibrating rod 401 outside the vibrating rod 401, and the multiple polarization blocks 407 are located on the rear side of the feed bin 1 stroke. Specifically: To avoid the problem of damage to the vibrating bar 3 caused by direct transmission of falling impact, when the material descends from the feeding bin 1 and contacts the top of the vibrating bar 3, the vibrating rod 401 can transmit vibration within the vibrating bar 3, and the loading block 402 located at the front can absorb the impact of falling material through the receiving parts 403 on both sides of the top, so that it is not easy to twist and deform when bearing large pieces of material on an off-center load, thus improving the energy absorption effect and improving the stability of subsequent vibrating feeding.

[0024] Please see Figures 3-4 The vibration amplification mechanism 4 also includes a lead screw seat 404, which is connected to the inner side of the vibrating bar 3. An adjusting lead screw 406 is internally threaded onto the lead screw seat 404. One end of the adjusting lead screw 406 is connected to one end of the vibrating rod 401, and a guide cone sleeve 405 is embedded on the other side of the lead screw seat 404.

[0025] By adjusting the screw 406 within the screw seat 404, the relative depth of the vibrating rod 401 within the vibrating bar 3 can be adjusted, facilitating control of the vibration field. The polarizing block 407 has a teardrop-shaped cross-section, including a relatively wide base and a protrusion that extends radially outward from the base and gradually narrows. The base is provided with an eccentrically arranged circular mounting hole and is mounted to the outside of the vibrating rod 401 through the circular mounting hole. Furthermore, the protrusions of the two rows of polarizing blocks 407 outside the two adjacent vibrating rods 401 extend at a preset angle in the circumferential direction; Specifically: By using the designed polarizing block 407, the center of gravity of the cross section can be shifted to one side. When subjected to vertical excitation force, the eccentric center of gravity will generate an additional load torque, transforming the single up-and-down jumping into a composite vibration of up-and-down and slight left-and-right swaying, thereby improving the conveying stability of the vibrating feeder.

[0026] To address the industry pain point that muddy sand or irregularly shaped stones with high moisture content are easily stuck in the gap of the vibrating bar 3, a teardrop-shaped polarizing block 407 is cleverly designed on the rear side of the stroke of the vibrating rod 401. The gradually narrowing protrusion of the block offsets the center of gravity of the cross section radially. When the main excitation force is transmitted vertically upward, the eccentric center of gravity structure will inevitably generate a torsional moment of additional load.

[0027] In particular, the protrusions of the polarization blocks 407 on two adjacent vibrating rods 401 form a preset angle in the circumferential direction, so that the adjacent vibrating bars 3 produce a composite spatial motion with a phase difference, including up-and-down jumping and slight left-and-right swaying.

[0028] A dynamically alternating gap width is formed between adjacent vibrating bars 3, i.e., the scissor effect, which can apply alternating squeezing and tearing stress to the jammed material, peel off the adhered and stuck material, and improve the continuity and stability of the conveying.

[0029] Please see Figure 5 The vibration amplification mechanism 4 also includes: Connecting sleeve 409 is sleeved on the outside of vibrating rod 401; The excitation part 410 is connected to the outside of the connecting sleeve 409. The excitation part 410 includes a plurality of guide plates that surround the outside of the connecting sleeve 409. The cross-sectional shape of the guide plates is wavy. Specifically: Through the designed excitation part 410, the wave-shaped guide plate surrounding the excitation part 410 can increase the vibration transmission effect in the feeding direction, improve the vibration feeding effect at the end of the vibrating bar 3 by increasing the undulation, and generate torsional micro-vibration through the wave-shaped guide plate, improve the vibration and dispersing effect on the material through creeping undulation, and improve the feeding and transportation efficiency. At the same time, the arrangement of the peripheral guide plates can strengthen the compressive strength of the connection position.

[0030] A vibrating section 410 with a wave-shaped cross section is sleeved on the outside of the vibrating rod 401. This not only creates a compressive effect similar to a reinforcing rib in terms of structural strength, but also changes the movement trajectory of the material in terms of dynamics. After receiving the composite excitation force, the wave-shaped guide plate will generate continuous torsional micro-vibration and creeping fluctuations in the material conveying direction. The high-frequency microwave state can effectively break the surface tension and adhesion of mud and sand caused by humidity, so that the material presents a highly loose fluidized state before entering the sand screening machine, which significantly improves the screening rate of subsequent sand screening processes.

[0031] Please see Figures 6-7 The guiding organization 5 includes: Guide groove 501, multiple guide grooves 501 are arrayed in the groove opened on the top of the mounting base 8, the guide groove 501 has a cavity, and the material is guided out through the cavity; Guide plate 503 is rotatably connected to guide groove 501 via rotating sleeve 507. Guide plate 503 is set in guide groove 501 at an inclined angle. With the designed guiding mechanism 5, when the material falls between adjacent vibrating bars 3, it is vibrated and guided by the inclined guide plate 503 in the guide groove 501.

[0032] Fine materials easily form dead zones at the bottom, which in turn restrict the amplitude of the excitation source. Specifically, the present invention uses the multi-level energy application mechanism 6 conduction strip 602 on the side wall to bypass and transmit the excitation driving force to the front of the guide groove 501 below without attenuation, and applies vibration energy to the easily accumulated area. At the same time, the array guide blocks 505 at the bottom of the guide plate 503 form a secondary resonance excitation, causing the fine materials to slide down rapidly in a boiling state on the inclined guide plate 503.

[0033] With the special angle and slot design of the sealing block 504, a tight one-way physical barrier is formed at the dynamic gap between the guide plate 503 and the guide groove 501, which completely eliminates the backflow and blockage of fine materials and maintains the long-term stability of the entire excitation transmission space.

[0034] Guiding agency 5 also includes: Guide block 505, multiple guide blocks 505 are arranged in an array along the length of the inner cavity of guide groove 501, guide block 505 is located at the bottom of guide plate 503, and a limiting bolt 506 is provided on one side of guide block 505. The limiting bolt 506 is limited and connected to the through groove 502 opened outside the guide groove 501. Specifically: The designed guide block 505 can be set at the bottom of the guide plate 503 to resonate and excite, thereby improving the vibration conveying effect of the material at the top of the guide plate 503. It is also beneficial to reduce the residue of fine materials in the dead zone position through the setting of the guide mechanism 5, and improve the conveying effect.

[0035] It also includes a blocking block 504, the front side of which is inclined, and the side of the blocking block 504 near the guide plate 503 is at an angle. The blocking block 504 has a slot on one side, and the blocking block 504 is sleeved on the front side of the guide plate 503 through the slot. Specifically: the designed blocking block 504 can prevent material from flowing back into the gap between the guide plate 503 and the guide groove 501, which is conducive to maintaining the normal transmission of the excitation space; Please see Figure 9 The multi-stage energy application mechanism 6 includes a fixed block 601 and a transmission strip 602; The fixing block 601 is connected to the inner wall of the feeding bin 1; Multiple conductive strips 602 are arrayed on one side of the fixed block 601, and the conductive strips 602 extend to the top side of the guide mechanism 5 at the corresponding position, and the vibration is transmitted through the conductive strips 602.

[0036] Specifically, through the designed multi-stage energy application mechanism 6, when the vibration drive unit 2 performs vibration drive, the driving force can be transmitted to the guide groove 501 through the transmission bar 602. At this time, the superimposed vibration of the transmission bar 602 can superimpose the vibration energy on the material piled up on the front side of the guide groove 501, which is beneficial to improve the driving processing effect.

[0037] Working principle: When the sand and gravel raw material falls from the feed end of the feeding bin 1, it first contacts the contact part of the array of vibrating bars 3. The loading block 402 at the front of the vibrating bar 3 absorbs and buffers the violent mechanical impact caused by large pieces of material using the receiving part 403 at its top. The vibration drive unit 2 is started and transmits the excitation force to the mounting base 8, thereby driving the entire vibrating bar 3 and the internal vibrating rod 401 to generate initial vibration.

[0038] In the composite polarization and material anti-jamming stage, as the material moves to the rear of the feeding bin 1, the vibration is transmitted to the teardrop-shaped polarization block 407 area located behind the vibrating rod 401. Since the polarization block 407 is eccentrically arranged and the polarization blocks 407 on the adjacent vibrating bars 3 have a preset angle, the linear vertical excitation force is converted into a composite polarization motion of up and down and local micro-amplitude left and right swaying. A local resonance field is formed between the adjacent vibrating bars 3 and a reverse torsional stress is generated, which forcibly peels off irregular stones or sticky mud and sand stuck in the gap of the vibrating bars 3, ensuring that the material is smoothly conveyed forward. The wave-shaped guide plate outside the excitation part 410 then generates creeping micro-vibration, which further disperses the material and improves the uniformity of the end feeding.

[0039] During the vibratory conveying process, some small materials pass through the gaps between multiple vibrating bars 3 and fall into the guide groove 501 at the top of the mounting base 8. The transmission bar 602 fixed to the side wall of the feeding bin 1 introduces the excitation force into the material piled up in front of the guide groove 501, performing multi-stage energy application and breaking the material accumulation state.

[0040] Fine materials fall onto the inclined guide plate 503. The guide block 505 at the bottom of the guide plate 503 resonates with the main excitation source, causing the fine materials to vibrate rapidly and be discharged along the guide plate 503.

[0041] The blocking block 504 installed on the front side of the guide plate 503 uses its angled design to block the material and prevent any tiny particles from flowing back into the vibration gap between the guide plate 503 and the guide groove 501, ensuring that the entire feeder bottom layer operates continuously and stably without dead zones or jamming.

[0042] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A feeder for supplying raw materials to a sand screening machine, comprising a feeding bin (1), a vibration drive unit (2) installed on one side of the external side of the feeding bin (1), and a feeding cavity inside the feeding bin (1), characterized in that, Also includes: Vibrating bar (3), multiple vibrating bars (3) are arranged in an array on the bottom side of the feeding cavity of the feeding bin (1), and there is a gap between the multiple vibrating bars (3) to accommodate the passage of materials; Mounting base (8) is installed at the bottom of the inner cavity of the feeding bin (1), and the vibration bar (3) is installed on the top of the mounting base (8). The vibration driving unit (2) vibrates the mounting base (8) and transmits the vibration to multiple vibration bars (3) for vibrating feeding. The vibration amplification mechanism (4) is installed in the cavity of multiple vibration bars (3) to amplify the vibration intensity. The guiding mechanism (5) is installed on the top of the mounting base (8) and guides the material to be discharged from the gap of the vibrating bar (3) through the guiding mechanism (5).

2. The feeder for raw material supply of a sand screening machine according to claim 1, characterized in that, The vibrating bar (3) includes: The contact part is used to contact the falling material. The contact part has a cavity, and the vibration is transmitted through the vibration amplification mechanism (4) assembled in the cavity. The connecting part is integrally connected to the bottom of the contact part. Both sides of the bottom of the connecting part have protrusions at the positions where they contact the mounting base (8). The protrusions are installed on the top of the mounting base (8) by pressure strips (7).

3. A feeder for supplying raw materials to a sand screening machine according to claim 2, characterized in that, The cross-sectional shape of the contact portion is one of a circle, an inverted trapezoid, and a semi-circular arc.

4. A feeder for supplying raw materials to a sand screening machine according to claim 1, characterized in that, The vibration amplification mechanism (4) includes: Vibration rod (401), multiple vibration rods (401) are inserted into the vibration bar (3), and multiple vibration rods (401) are connected in an expandable manner through screws (408) and threaded grooves; Loading blocks (402): Multiple loading blocks (402) are arranged in an array outside the vibrating rod (401) along the axis of the vibrating rod (401). Multiple loading blocks (402) are located at the feeding end of the feeding bin (1). The loading blocks (402) are coupled with the inner wall of the vibrating bar (3) through the contact of the loading blocks (402) with the inner wall of the vibrating bar (3). The top two sides of the loading blocks (402) have receiving parts (403) to absorb the impact of falling material through the receiving parts (403) on both sides. Polarizing blocks (407) are arranged in an array along the axis of the vibrating rod (401) outside the vibrating rod (401), and the polarizing blocks (407) are located on the rear side of the feed bin (1) stroke.

5. A feeder for supplying raw materials to a sand screening machine according to claim 4, characterized in that, The polarizing block (407) has a teardrop-shaped cross-section, including a relatively wide base and a protrusion that extends radially outward from the base and gradually narrows. The base is provided with an eccentrically arranged circular mounting hole and is mounted on the outside of the vibrating rod (401) through the circular mounting hole. The protrusions of the two rows of polarizing blocks (407) outside two adjacent vibrating rods (401) extend in a predetermined angle in the circumferential direction.

6. A feeder for supplying raw materials to a sand screening machine according to claim 5, characterized in that, The vibration amplification mechanism (4) also includes: A connecting sleeve (409) is fitted onto the outside of the vibrating rod (401); The excitation part (410) is connected to the outside of the connecting sleeve (409). The excitation part (410) includes a plurality of guide plates that surround the outside of the connecting sleeve (409). The cross-sectional shape of the guide plates is wavy.

7. A feeder for supplying raw materials to a sand screening machine according to claim 1, characterized in that, The guiding mechanism (5) includes: Guide groove (501), multiple guide grooves (501) are arrayed in the groove opened on the top of the mounting base (8), the guide groove (501) has a cavity, and the material is guided out through the cavity; The guide plate (503) is rotatably connected to the guide groove (501) through the rotating sleeve (507). The guide plate (503) is set in the guide groove (501) at an inclined angle. When the material falls from the adjacent vibrating strip (3), it is vibrated and guided by the inclined guide plate (503) in the guide groove (501).

8. A feeder for supplying raw materials to a sand screening machine according to claim 7, characterized in that, The guiding mechanism (5) also includes: Guide block (505): Multiple guide blocks (505) are arranged in an array along the length of the inner cavity of the guide groove (501). The guide block (505) is located at the bottom of the guide plate (503). A limiting bolt (506) is provided on one side of the guide block (505). The limiting bolt (506) is limited and connected to the through groove (502) opened outside the guide groove (501).

9. A feeder for supplying raw materials to a sand screening machine according to claim 1, characterized in that, Also includes: The sealing block (504) has an inclined front side and the side of the sealing block (504) close to the guide plate (503) has an oblique angle. The sealing block (504) has a slot on one side and is fitted onto the front side of the guide plate (503) through the slot.

10. A feeder for supplying raw materials to a sand screening machine according to claim 1, characterized in that, It also includes a multi-stage energy application mechanism (6), which includes: A fixing block (601) is connected to the inner wall of the feeding bin (1); A conductive strip (602) is arranged in an array on one side of the fixed block (601), and the conductive strip (602) extends to the top side of the guide mechanism (5) at the corresponding position to conduct vibration through the conductive strip (602).

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