Sieve plate capable of adjusting grain size distribution on line and crusher

Abstract

The invention provides a sieve plate capable of adjusting grain size distribution online and a crusher, and belongs to the technical field of crushers, the sieve plate comprises a plurality of sieve strips, a long-strip-shaped sieve hole is formed between any two adjacent sieve strips, and the sieve plate further comprises a plurality of adjusting assemblies; the adjusting assembly comprises two rotating blocks, two adjusting blocks, two first driving parts and two second driving parts, the rotating blocks are rotationally connected to the lower ends of the grate bars and connected with the first driving parts, and the rotating blocks are provided with butt joint faces; a sliding groove is formed in the side, away from the butt joint face, of the rotating block body, and the regulating block body is installed in the sliding groove and has the freedom degree of sliding in the sliding groove. And the second driving piece is connected with the regulation and control block body and is used for driving the regulation and control block body to slide. According to the sieve plate capable of adjusting the grain size distribution online, online adjustment of the discharging grain size distribution is achieved, continuous operation of a production line is guaranteed, the production efficiency is improved, and the requirement for flexible production of the modern manufacturing industry is met.

Description

Technical Field

[0001] This application belongs to the field of crusher technology, and more specifically, relates to a screen plate and crusher with online adjustable particle size distribution. Background Technology

[0002] In the foundry silica sand production process, the coarse crushing stage is a crucial step in ensuring the quality of subsequent products. Hammer crushers, due to their high crushing efficiency and strong adaptability, have become the core equipment in this process. Precise control of the output particle size directly determines the stability of subsequent processes such as shaping and grading. This control function mainly relies on the screen plates arranged at the bottom or around the perimeter of the hammer crusher. Therefore, the screen plate structure design and adjustment performance have a decisive impact on the operational quality of the entire foundry silica sand production line.

[0003] In actual production, when the output particle size needs to be adjusted according to production requirements, the entire production line must be shut down, and screen plates with different grate sizes must be manually disassembled and replaced. However, this method relies on shutdown operations, which not only interrupts the continuous operation of the production line and reduces production efficiency, but also causes significant deviations in the output gradation when the hardness, moisture, and other characteristics of the feed material fluctuate. This directly undermines the process stability of subsequent shaping processes and fails to meet the production needs of modern manufacturing. Summary of the Invention

[0004] The purpose of this application is to provide a screen plate and crusher with online adjustable particle size distribution, so as to solve the technical problem that the screen plate gap cannot be automatically adjusted in the prior art, making it difficult to meet production needs.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a sieve plate with online adjustable particle size distribution, including multiple sieve bars, and forming elongated sieve holes between any two adjacent sieve bars, and further including multiple sets of adjustment components, and the multiple sets of adjustment components correspond one-to-one with the multiple sieve bars; The adjustment assembly includes two rotating blocks, two control blocks respectively mounted on the two rotating blocks, two first driving members, and two second driving members. One end of each rotating block is rotatably connected to the lower end of the sieve bar, and the rotating block is connected to the first driving member, driving the rotating block to enter or exit the sieve hole. Each rotating block has a mating surface that mates with one side of the inner wall of the sieve hole, and the rotating block is used to occupy the space of the sieve hole to reduce the width of the sieve hole. A sliding groove is formed on the side of the rotating block away from the mating surface, and the control block is installed in the sliding groove and has the freedom to slide into or out of the sliding groove. The second driving member is connected to the control block and is used to drive the control block to slide, thereby adjusting the available width of the sieve hole.

[0006] In one possible implementation, the bottom surface of the chute is provided with inwardly extending limiting grooves at both the upper and lower ends. The control block is provided with two guide plates on one side of the chute, and the two guide plates are respectively installed in the two limiting grooves and are slidably connected with the corresponding limiting grooves.

[0007] In one possible implementation, a mounting groove is formed on the bottom surface of the slide, and the second driving member is installed in the mounting groove; the regulating block has a thickened part on one side inside the slide, and the free end of the first driving member is hinged to the thickened part.

[0008] In one possible implementation, the groove has a downwardly recessed connecting surface on the side of the groove corresponding to the lower limiting groove. The connecting surface is lower than the limiting groove. A receiving groove is formed on the connecting surface. A plurality of elastic bodies are arranged in an array in the receiving groove. The upper ends of the elastic bodies are connected to the control block and the guide plate.

[0009] In one possible implementation, the guide plate moves a distance less than or equal to the depth of the limiting groove.

[0010] In one possible implementation, the side of the rotating block away from the mating surface is an inclined surface; after the rotating block enters the sieve hole, the width of the rotating block gradually decreases from top to bottom; the regulating block has a mating inclined surface arranged parallel to the inclined surface.

[0011] In one possible implementation, the upper end of the rotating block has a collapsed surface that gradually decreases from the sieve bar toward the sieve hole.

[0012] In one possible implementation, mounting base assemblies are provided on both sides of the lower end of the screen bar, and the mounting base assembly includes two spaced mounting bases; a connecting plate is provided on the mating surface of the rotating block, and the connecting plate is arranged perpendicular to the mating surface. The connecting plate is located between the two mounting bases in the same group and is rotatably connected to the two mounting bases.

[0013] In one possible implementation, the lower end face of the screen bar is provided with an upwardly recessed clearance groove, and the two mounting seats in the same group are respectively located on both sides of the clearance groove; the length of the clearance groove is greater than the length of the rotating block, and the depth is greater than the width of the rotating block; both rotating blocks are used to be accommodated in the clearance groove.

[0014] The beneficial effects of the screen plate with online adjustable particle size distribution provided in this application are as follows: Compared with the prior art, the screen plate with online adjustable particle size distribution of this application realizes flexible online adjustment of the screen aperture width through modular screen bars and precise adjustment component design. The combined structure formed by the screen bars and one-to-one corresponding adjustment components breaks the limitation of traditional fixed screen apertures. Multiple screen bars are arranged in parallel to form long strip-shaped screen apertures, which serve as the basic channel for material screening. Multiple sets of adjustment components equip each screen bar with an independent control unit to ensure the accuracy and flexibility of screen aperture adjustment. The two rotating blocks, two control blocks, and corresponding first and second drive components in each set of adjustment components form a dual adjustment mechanism.

[0015] The rotating block, connected to the lower end of the screen bars, can switch between entering and exiting the screen holes under the drive of the first drive component. Its mating surface can precisely fit against one side of the inner wall of the screen hole, initially reducing the screen hole width by occupying the screen hole space. The sliding groove on the rotating block provides a sliding track for the control block. The second drive component can drive the control block to slide in or out along the groove, further fine-tuning the usable width of the screen hole. This dual adjustment structure allows for a wider range of screen hole width adjustment and more controllable precision. In actual operation, adjustments can be made in real time according to production needs and fluctuations in feed characteristics without stopping the machine.

[0016] During use, first determine the required width of the screen aperture based on the target output particle size. If the screen aperture needs to be reduced, activate the first drive unit to drive the rotating block to rotate around the lower end of the screen bar until it enters the screen aperture, so that the mating surface of the rotating block is tightly fitted with one side of the inner wall of the screen aperture. The initial width adjustment is completed by the rotating block occupying part of the screen aperture space. Then, activate the second drive unit to drive the adjusting block to slide in or out along the slide groove of the rotating block according to the output gradation deviation caused by fluctuations in the hardness, moisture and other characteristics of the feed material. Fine-tune the available width of the screen aperture until the target output particle size gradation requirement is met. If the screen aperture width needs to be increased, the operation can be reversed. First, use the second drive unit to retract the adjusting block into the slide groove, and then use the first drive unit to drive the rotating block out of the screen aperture to restore the initial width of the screen aperture or make other range adjustments.

[0017] This approach solves the drawback of traditional screen plates requiring machine shutdown for adjustment, enabling online real-time adjustment of the output particle size distribution. This ensures continuous operation of the production line, improves production efficiency, and meets the flexible production needs of modern manufacturing. Furthermore, the dual adjustment mechanism enhances the control precision of the output particle size distribution, flexibly responding to fluctuations in the hardness and moisture content of the feed material. This effectively avoids output gradation deviations, ensures the process stability of subsequent shaping processes, and improves the uniformity of the final cast silica sand product. Each screen bar is equipped with an independent adjustment component, allowing for precise adjustment of single or multiple screen holes. The screen hole width in different areas can be flexibly set according to production needs, further optimizing the particle size distribution effect.

[0018] Another object of this application is to provide a crusher including any of the above-described screen plates with online adjustable particle size distribution.

[0019] The crusher provided in this application, by adopting a screen plate with online adjustable particle size distribution, realizes real-time online adjustment of the output particle size distribution, ensuring continuous operation of the production line, improving production efficiency, and meeting the needs of flexible production in modern manufacturing. It also effectively avoids output particle size distribution deviation, ensures the process stability of subsequent shaping processes, and improves the quality uniformity of the final foundry silica sand product. Furthermore, it can flexibly set the screen hole width in different areas according to production needs, further optimizing the particle size distribution effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the usage state of the adjustment component provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the usage state of the adjustment component provided in the embodiments of this application. Figure 2 ; Figure 3 A schematic diagram illustrating the usage state of the sieve plate with online adjustable particle size distribution provided in the embodiments of this application. Figure 1 ; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 A schematic diagram illustrating the usage state of the sieve plate with online adjustable particle size distribution provided in the embodiments of this application. Figure 2 ; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 A schematic diagram illustrating the usage state of the sieve plate with online adjustable particle size distribution provided in the embodiments of this application. Figure 3 ; Figure 8 for Figure 7 Enlarged view of point C in the middle; Figure 9 This is a schematic diagram showing the connection between the first driving member and the rotating block provided in an embodiment of this application.

[0022] The following are the labeling elements in the figure: 10. Screen bar; 11. Screen hole; 12. Mounting base; 13. Clearance groove; 20. Adjustment component; 21. Connecting plate; 30. Rotating block; 31. Butt joint surface; 32. Slide groove; 33. Limiting groove; 34. Mounting groove; 35. Connecting surface; 36. Receiving groove; 37. Elastic body; 38. Inclined surface; 39. Collapsed surface; 40. Adjustment block; 41. Guide plate; 42. Thickened part; 43. Mating inclined surface; 50. First driving component; 51. Bevel gear; 60. Second driving component. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] Please see Figures 1 to 9 The sieve plate with adjustable particle size distribution provided in this application will now be described. A sieve plate with adjustable particle size distribution includes a plurality of sieve bars 10, and elongated sieve holes 11 are formed between any two adjacent sieve bars 10. It also includes a plurality of adjustment components 20, and the plurality of adjustment components 20 correspond one-to-one with the plurality of sieve bars 10. The adjustment assembly 20 includes two rotating blocks 30, two control blocks 40 respectively mounted on the two rotating blocks 30, two first driving members 50, and two second driving members 60. One end of the rotating block 30 is rotatably connected to the lower end of the screen bar 10, and the rotating block 30 is connected to the first driving member 50 to drive the rotating block 30 into or out of the screen hole 11. The rotating block 30 has a mating surface 31 that fits into one side of the inner wall of the screen hole 11, and the rotating block 30 is used to occupy the space of the screen hole 11 to reduce the width of the screen hole 11. A sliding groove 32 is provided on the side of the rotating block 30 away from the mating surface 31. The control block 40 is installed in the sliding groove 32 and has the freedom to slide into or out of the sliding groove 32. The second driving member 60 is connected to the control block 40 and is used to drive the control block 40 to slide to adjust the available width of the screen hole 11.

[0028] The screen plate with online adjustable particle size distribution provided in this application, compared with the prior art, achieves flexible online adjustment of the width of the screen aperture 11 through the modular design of the screen bars 10 and the precise adjustment components 20. The combined structure formed by the screen bars 10 and the one-to-one corresponding adjustment components 20 breaks the limitation of the traditional fixed screen aperture 11. Multiple screen bars 10 are arranged in parallel to form long strip-shaped screen apertures 11, which serve as the basic channel for material screening. The multiple sets of adjustment components 20 are equipped with an independent control unit for each screen bar 10, ensuring the accuracy and flexibility of the screen aperture 11 adjustment. The two rotating blocks 30, two control blocks 40, and the corresponding first drive component 50 and second drive component 60 in each set of adjustment components 20 form a dual adjustment mechanism.

[0029] The rotating block 30, connected to the lower end of the screen bar 10, can switch between entering and exiting the screen hole 11 under the drive of the first drive component 50. Its mating surface 31 can precisely fit against one side of the inner wall of the screen hole 11, achieving an initial reduction in the width of the screen hole 11 by occupying the space of the screen hole 11. The sliding groove 32 on the rotating block 30 provides a sliding track for the adjusting block 40. The second drive component 60 can drive the adjusting block 40 to slide in or out along the sliding groove 32, further fine-tuning the available width of the screen hole 11. The dual adjustment structure makes the width adjustment range of the screen hole 11 wider and the precision more controllable. In actual operation, adjustments can be made in real time according to production needs and fluctuations in feed characteristics without stopping the machine.

[0030] During use, the required width of the screen hole 11 is first determined according to the target output particle size. If the screen hole 11 needs to be reduced, the first driving component 50 is activated to drive the rotating block 30 to rotate around the lower end of the screen bar 10 until it enters the screen hole 11, so that the mating surface 31 of the rotating block 30 is tightly fitted with one side of the inner wall of the screen hole 11. The initial width adjustment is completed by the rotating block 30 occupying part of the screen hole 11 space. Then, the second driving component 60 is activated to drive the adjusting block 40 to slide in or out along the slide groove 32 of the rotating block 30 according to the output gradation deviation caused by the fluctuation of the feed hardness, humidity and other characteristics. The available width of the screen hole 11 is finely adjusted until the target output particle size gradation requirement is met. If the width of the screen hole 11 needs to be increased, the operation can be reversed. First, the adjusting block 40 is retracted into the slide groove 32 by the second driving component 60, and then the rotating block 30 is driven out of the screen hole 11 by the first driving component 50 to restore the initial width of the screen hole 11 or to make other range adjustments.

[0031] This approach solves the drawback of traditional screen plates requiring machine shutdown for adjustment, enabling online real-time adjustment of the output particle size distribution. This ensures continuous operation of the production line, improves production efficiency, and meets the flexible production needs of modern manufacturing. Furthermore, the dual adjustment mechanism enhances the control precision of the output particle size distribution, flexibly responding to fluctuations in the hardness and moisture content of the feed material. This effectively avoids output particle size distribution deviations, ensures the process stability of subsequent shaping processes, and improves the uniformity of the final cast silica sand product. Each screen bar 10 is equipped with an independent adjustment component 20, which allows for precise adjustment of one or more screen holes 11. The width of the screen holes 11 in different areas can be flexibly set according to production needs, further optimizing the particle size distribution effect.

[0032] Optionally, the first driving component 50 is a driving mechanism consisting of a motor, coupling, reducer, and two bevel gears 51. The rotating shaft of the rotating block 30 is connected to one of the bevel gears 51, and the motor is fixedly installed at the end of the screen plate and connected to the other bevel gear 51. Power transmission is achieved through the meshing connection of the two bevel gears 51. The second driving component 60 is an electric push rod, cylinder, oil cylinder, etc., with channels opened on the screen bar 10 for connecting lines, air lines, or oil lines.

[0033] Please see Figure 1 and Figure 2 As a specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, the bottom surface of the chute 32 is provided with inwardly extending limiting grooves 33 at both the upper and lower ends. The control block 40 is provided with two guide plates 41 on one side inside the chute 32, and the two guide plates 41 are respectively installed in the two limiting grooves 33 and are slidably connected with the corresponding limiting grooves 33. The two limiting grooves 33 and the two guide plates 41 form a guiding and limiting fit structure, which further optimizes the sliding stability of the control block 40.

[0034] During operation, based on the original dual adjustment, when the second driving component 60 drives the control block 40 to slide in or out along the slide groove 32, the two guide plates 41 will slide synchronously in the corresponding limit grooves 33. With the constraint of the limit grooves 33 on the guide plates 41, it is ensured that the control block 40 always slides smoothly along the preset trajectory.

[0035] This structure solves the problem of easy deviation and jamming during the sliding of the control block 40, improves the accuracy and reliability of the fine adjustment of the width of the screen hole 11, avoids uneven width of the screen hole 11 due to the deviation of the control block 40, further ensures the stability of the output gradation, and better copes with the fluctuation of the feed characteristics.

[0036] Please see Figure 1 and Figure 2 As a specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, a mounting groove 34 is provided on the bottom surface of the chute 32, and the second drive member 60 is installed in the mounting groove 34; a thickened part 42 is provided on one side of the control block 40 located in the chute 32, and the free end of the first drive member 50 is hinged to the thickened part 42. By providing a mounting groove 34 on the bottom surface of the chute 32 to accommodate the second drive member 60, and by providing a thickened part 42 on one side of the control block 40 located in the chute 32 and hinged to the free end of the first drive member 50, the drive structure layout and connection stability are optimized.

[0037] During operation, the original dual adjustment logic continues. When the first drive component 50 is activated, its free end, through the hinge with the thickened part 42, drives the control block 40 to rotate and move in and out of the screen hole 11. When the second drive component 60 is activated, the drive component in the mounting groove 34 can smoothly drive the control block 40 to slide along the slide groove 32. The mounting groove 34 allows the second drive component 60 to be embedded, avoiding collision and wear with materials and improving its service life. The thickened part 42 enhances the connection strength between the control block 40 and the first drive component 50, preventing damage when the drive is under force and ensuring adjustment reliability.

[0038] Please see Figure 1 and Figure 2As a specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, the groove 32 has a downwardly recessed connecting surface 35 on the groove side corresponding to the lower limiting groove 33. The connecting surface 35 is lower than the limiting groove 33, and a receiving groove 36 is opened on the connecting surface 35. A plurality of elastic bodies 37 arranged in an array are provided in the receiving groove 36. The upper end of the elastic body 37 is connected to the control block 40 and the guide plate 41. By providing a connecting surface 35 lower than the limiting groove 33 on the groove side corresponding to the lower limiting groove 33 of the groove 32, opening a receiving groove 36 on the connecting surface 35 and placing an array of elastic bodies 37 inside, and connecting the upper end of the elastic body 37 to the control block 40 and the guide plate 41, an elastic buffer guiding structure is formed. The elastomer 37 can buffer the impact when the control block 40 slides, avoid hard contact wear, and improve the smoothness of sliding; the array arrangement makes the elastic force uniform, prevents the control block 40 from tilting, and ensures the fine adjustment accuracy of the screen hole 11; the receiving groove 36 realizes the hidden installation of the elastomer 37 to avoid contact damage with materials; the connecting surface 35 is lower than the limiting groove 33 to avoid interference with the sliding of the guide plate 41.

[0039] Please see Figure 1 and Figure 2 As a specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, the moving distance of the guide plate 41 is less than or equal to the depth of the limiting groove 33; by limiting the moving distance of the guide plate 41 to not exceed the depth of the limiting groove 33, the operational reliability of the guide limiting structure is optimized. During operation, the second driving member 60 drives the control block 40 to slide, and the guide plate 41 moves synchronously within the limiting groove 33. Because the moving distance is constrained by the depth of the limiting groove 33, the guide plate 41 can be prevented from disengaging from the limiting groove 33.

[0040] In this way, the failure of the guide structure can effectively prevent the control block 40 from shifting or jamming, ensuring the adjustment accuracy of the screen hole 11 width; avoiding damage to components due to collision, and extending the service life of the adjustment component 20.

[0041] Please see Figures 1 to 8 In one specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, the side of the rotating block 30 away from the mating surface 31 is an inclined surface 38; after the rotating block 30 enters the screen hole 11, the width of the rotating block 30 gradually decreases from top to bottom; the regulating block 40 has a mating inclined surface 43 parallel to the inclined surface 38. By optimizing the structure of the rotating block 30 and the regulating block 40, the side of the rotating block 30 away from the mating surface 31 is set as an inclined surface 38, so that its width decreases from top to bottom after entering the screen hole 11, while the regulating block 40 is provided with a mating inclined surface 43 parallel to the inclined surface 38. The design of the inclined surface 38 allows the material entering the screen hole 11 to be discharged quickly.

[0042] Please see Figure 1 and Figure 2As a specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, the upper end of the rotating block 30 has a collapsed surface 39 that gradually decreases from the screen bars 10 towards the screen holes 11. The specific collapsed surface 39, which gradually decreases from the screen bars 10 towards the screen holes 11, forms an avoidance structure to prevent impact from the breaker hammer. During the crushing process, the breaker hammer and the material act on the screen bars 10, effectively preventing the impact of the breaker hammer and the material on the rotating block 30, reducing impact damage to the rotating block 30, avoiding vibration interference caused by impact, and ensuring the adjustment accuracy of the screen holes 11 and the stability of the production line operation.

[0043] Please see Figures 1 to 9 As a specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, the lower ends of the screen bar 10 are provided with mounting base assemblies on both sides, each mounting base assembly including two spaced mounting seats 12; a connecting plate 21 is provided on the mating surface 31 of the rotating block 30, and the connecting plate 21 is set perpendicular to the mating surface 31. The connecting plate 21 is located between the two mounting seats 12 in the same group and is rotatably connected to the two mounting seats 12. By providing mounting base assemblies with two spaced mounting seats 12 on both sides of the lower end of the screen bar 10, and simultaneously providing a connecting plate 21 perpendicular to the mating surface 31 of the rotating block 30, a stable rotating connection structure is formed, providing support for the precise entry and exit of the rotating block 30 into and out of the screen holes 11.

[0044] During operation, the first driving component 50 is activated to drive the rotating block 30 to rotate. The connecting plate 21 rotates synchronously between the two mounting seats 12 in the same group. With the help of the limiting guide of the mounting seat 12, the rotating block 30 is driven to smoothly enter or leave the screen hole 11 without the need for additional positioning operation.

[0045] The design of the double mounting base 12 and the connecting plate 21 improves the installation stability and rotation smoothness of the rotating block 30, avoids deviation and shaking during rotation, and ensures the accuracy of the screen hole 11 width adjustment; the spaced mounting bases 12 can distribute the force, enhance the load-bearing capacity of the connection structure, and adapt to the vibration environment under crushing conditions.

[0046] Please see Figures 1 to 8As a specific embodiment of the screen plate with online adjustable particle size distribution provided in this application, the lower end face of the screen bar 10 is provided with an upwardly recessed relief groove 13, and two mounting seats 12 of the same group are respectively located on both sides of the relief groove 13; the length of the relief groove 13 is greater than the length of the rotating block 30, and the depth is greater than the width of the rotating block 30; both rotating blocks 30 are used to accommodate the relief groove 13. The upwardly recessed relief groove 13 is provided on the lower end face of the screen bar 10, and the two mounting seats 12 of the same group are respectively located on both sides of the relief groove 13, and the length and depth of the relief groove 13 are greater than the length and width of the rotating block 30, ensuring that the two rotating blocks 30 can be completely accommodated within the relief groove 13.

[0047] When the rotating block 30 is not needed to occupy the space of the screen hole 11, the first driving component 50 is activated to drive the rotating block 30 to rotate around the connection point between the connecting plate 21 and the mounting base 12 until it is completely housed in the clearance groove 13; when the width of the screen hole 11 needs to be adjusted, the rotating block 30 is driven to rotate out of the clearance groove 13 and into the screen hole 11. The clearance groove 13 provides a dedicated storage space for the rotating block 30, avoiding material impact and wear caused by the rotating block 30 being exposed when idle, while not occupying the effective space around the screen hole 11; the matching layout of the mounting base 12 and the clearance groove 13 ensures that the rotation trajectory of the rotating block 30 is accurate and avoids interference with the screen bar 10.

[0048] Not shown in the figure, this application embodiment also provides a crusher, which includes any of the above-mentioned screen plates with online adjustable particle size distribution.

[0049] The crusher provided in this application adopts the aforementioned screen plate with online adjustable particle size distribution. Therefore, this method solves the drawback of traditional screen plates requiring machine shutdown for adjustment, realizes online real-time adjustment of the output particle size distribution, ensures continuous operation of the production line, improves production efficiency, and meets the needs of flexible production in modern manufacturing. Furthermore, the dual adjustment mechanism improves the control accuracy of the output particle size distribution, can flexibly cope with fluctuations in the hardness, moisture, and other characteristics of the feed, effectively avoids output gradation deviation, ensures the process stability of subsequent shaping processes, and improves the quality uniformity of the final cast silica sand product. Each screen bar 10 is equipped with an independent adjustment component 20, which can realize precise adjustment of one or more screen holes 11, and can flexibly set the width of screen holes 11 in different areas according to production needs, further optimizing the particle size distribution effect.

[0050] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sieve plate with online adjustable particle size distribution, comprising a plurality of sieve bars, wherein elongated sieve holes are formed between any two adjacent sieve bars, characterized in that, It also includes multiple sets of adjustment components, and each set of adjustment components corresponds one-to-one with one of the multiple screen bars; The adjustment assembly includes two rotating blocks, two control blocks respectively mounted on the two rotating blocks, two first driving members, and two second driving members. One end of each rotating block is rotatably connected to the lower end of the sieve bar, and the rotating block is connected to the first driving member, driving the rotating block to enter or exit the sieve hole. Each rotating block has a mating surface that mates with one side of the inner wall of the sieve hole, and the rotating block is used to occupy the space of the sieve hole to reduce the width of the sieve hole. A sliding groove is formed on the side of the rotating block away from the mating surface, and the control block is installed in the sliding groove and has the freedom to slide into or out of the sliding groove. The second driving member is connected to the control block and is used to drive the control block to slide, thereby adjusting the available width of the sieve hole.

2. The sieve plate with online adjustable particle size distribution as described in claim 1, characterized in that, The bottom surface of the chute is provided with inwardly extending limiting grooves at both the upper and lower ends. The control block is provided with two guide plates on one side of the chute, and the two guide plates are respectively installed in the two limiting grooves and are slidably connected with the corresponding limiting grooves.

3. The sieve plate with online adjustable particle size distribution as described in claim 2, characterized in that, An installation groove is provided on the bottom surface of the slide, and the second driving component is installed in the installation groove; The regulating block has a thickened part on one side of the slide groove, and the free end of the first driving member is hinged to the thickened part.

4. The sieve plate with online adjustable particle size distribution as described in claim 2, characterized in that, The groove has a downwardly recessed connecting surface on the side of the groove corresponding to the lower limiting groove. The connecting surface is lower than the limiting groove. A receiving groove is opened on the connecting surface. A plurality of elastic bodies are arranged in an array in the receiving groove. The upper end of the elastic body is connected to the control block and the guide plate.

5. The sieve plate with online adjustable particle size distribution as described in claim 4, characterized in that, The moving distance of the guide plate is less than or equal to the depth of the limiting groove.

6. The sieve plate with online adjustable particle size distribution as described in claim 1, characterized in that, The side of the rotating block away from the mating surface is an inclined surface; after the rotating block enters the sieve hole, the width of the rotating block gradually decreases from top to bottom; the regulating block has a mating inclined surface that is parallel to the inclined surface.

7. The sieve plate with online adjustable particle size distribution as described in claim 1, characterized in that, The upper end of the rotating block has a collapsed surface that gradually decreases from the sieve bar toward the sieve hole.

8. The sieve plate with online adjustable particle size distribution as described in claim 1, characterized in that, The lower ends of the screen bars are provided with mounting base assemblies on both sides, and the mounting base assembly includes two mounting bases arranged at intervals; the mating surface of the rotating block is provided with a connecting plate, and the connecting plate is arranged perpendicular to the mating surface. The connecting plate is located between the two mounting bases in the same group and is rotatably connected to the two mounting bases.

9. The sieve plate with online adjustable particle size distribution as described in claim 8, characterized in that, The lower end face of the screen bar is provided with an upwardly recessed clearance groove, and the two mounting seats in the same group are respectively located on both sides of the clearance groove; the length of the clearance groove is greater than the length of the rotating block, and the depth is greater than the width of the rotating block; both rotating blocks are used to be accommodated in the clearance groove.

10. A crusher, characterized in that, Includes the sieve plate with online adjustable particle size distribution as described in any one of claims 1-9.

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