Raw material screening device for cement product manufacturing

Abstract

This utility model discloses a raw material screening device for cement product manufacturing, relating to the field of cement product manufacturing technology. It includes a screening box, a feeding hopper, a horizontal plate, and a drive motor. The bottom of the feeding hopper is fixedly connected to the top of the inner wall of the screening box, and the bottom of the drive motor is fixedly connected to the top of the horizontal plate. A sorting mechanism is provided inside the screening box, and an auxiliary mechanism is provided on one side of the screening box. The sorting mechanism is used to screen the raw materials, and the auxiliary mechanism is used to flatten the raw materials. This utility model solves the following problems of existing raw material screening devices for cement product manufacturing by setting up the sorting mechanism and the auxiliary mechanism: the screening frame is prone to clogging, leading to obstructed screening and cumbersome operation; it relies heavily on manual labor, requiring manual intervention, which increases labor costs and reduces efficiency; it can only move the screening material in one direction, limiting its effectiveness; and prolonged operation can cause raw materials to accumulate in a certain place on the screen, slowing down the screening speed and seriously affecting the production progress.

Description

Technical Field

[0001] This utility model relates to the field of cement product manufacturing technology, specifically to a raw material screening device for cement product manufacturing. Background Technology

[0002] Cement products, as the name suggests, are products made from cement as a raw material. Cement products have always occupied an important position in the construction industry. With the development of the construction industry, the demand for cement product production and processing is also increasing, and the processing requirements for cement products are also becoming higher. Therefore, before manufacturing cement products, the raw materials need to be screened by a screening device.

[0003] Existing raw material screening devices for cement product manufacturing have the following problems: the screening frame is prone to clogging, which hinders screening and makes operation troublesome; it is highly dependent on manual labor, requiring manual intervention, which increases labor costs and reduces efficiency; and it can only move the screen in one direction, which limits the method; long-term operation can also cause raw materials to accumulate in a certain place on the screen, slowing down the screening speed and seriously affecting the production progress. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a raw material screening device for cement product manufacturing, which has the advantages of preventing screen blockage, reducing manual labor dependence, multi-directional screening, and avoiding raw material accumulation, and solves the problems of screening obstruction, low efficiency, high cost, limited screening methods, and slow speed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a raw material screening device for cement product manufacturing, comprising a screening box, a feeding hopper, a horizontal plate and a drive motor, wherein the bottom of the feeding hopper is fixedly connected to the top of the inner wall of the screening box, the bottom of the drive motor is fixedly connected to the top of the horizontal plate, a sorting mechanism is provided inside the screening box, and an auxiliary mechanism is provided on one side of the screening box. The sorting mechanism is used to screen the raw materials; The auxiliary mechanism is used to level the raw materials.

[0006] In a preferred embodiment of this utility model, the sorting mechanism includes a worm gear, a cam, a push block, a pressure rod, a first screening frame, a limiting rod, a guide plate, and a sector gear. The bottom of the worm gear is fixedly connected to the top of the sector gear. The left side surface of the cam is rotatably connected to the right side of the inner wall of the push block. The left side surface of the pressure rod is fixedly connected to the right side surface of the first screening frame. The left side surface of the limiting rod is fixedly connected to the right side surface of the screening box. Both ends of the guide plate are fixedly connected to the inner wall of the screening box. The left side surface of the horizontal plate is fixedly connected to the right side surface of the screening box.

[0007] In a preferred embodiment of this invention, the auxiliary mechanism includes a worm gear, a transmission rod, a first bevel gear, a second bevel gear, a reciprocating screw, a sliding block, a cylinder, and a scraper. The inner wall of the worm gear is rotatably connected to the outer wall of the transmission rod. The surface of the first bevel gear is meshed with the surface of the second bevel gear. The surface of the reciprocating screw is threadedly connected to the inner wall of the sliding block. The output end of the cylinder is fixedly connected to the front end of the scraper, and the front end of the cylinder is fixedly connected to the rear end of the sliding block.

[0008] In a preferred embodiment of this invention, a first spring is provided on the surface of the limiting rod, with both ends of the first spring fixedly connected to the surface of the limiting rod, the inner wall of the pushing block is slidably connected to the outer wall of the limiting rod, and the output end of the drive motor is fixedly connected to the bottom of the sector gear.

[0009] In a preferred embodiment of this invention, the bottom of the sector gear is provided with a mating rack, the left side surface of the mating rack is provided with a second screening frame, the bottom of the sector gear is meshed with the top of the mating rack, and the left side surface of the mating rack is fixedly connected to the right side surface of the second screening frame.

[0010] In a preferred embodiment of this invention, a telescopic rod is provided at the rear end of the mating rack, the output end of the telescopic rod is fixedly connected to the rear end of the mating rack, the right side surface of the pressure rod is fixedly connected to the left side surface of the push block, and the right side surface of the worm gear is meshed with the left side surface of the worm wheel.

[0011] As a preferred embodiment of this utility model, a second spring is provided on the surface of the telescopic rod, with both ends of the second spring fixedly connected to the surface of the telescopic rod, the front end of the transmission rod being fixedly connected to the rear end of the first bevel gear, and the left side surface of the second bevel gear being fixedly connected to the right side surface of the reciprocating lead screw.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model solves the problems of obstructed screening, low efficiency, high cost, limited screening methods and slow speed by setting up a sorting mechanism and auxiliary mechanism, and achieves the effects of preventing screen blockage, reducing manual labor, multi-directional screening and avoiding raw material accumulation.

[0013] 2. This utility model, by setting up a sorting mechanism, uses a drive motor to drive components such as sector gears and worm gears to achieve dual screening by vibrating the first screening frame up and down and moving the second screening frame left and right. This can efficiently separate raw materials, improve screening effect and efficiency, reduce manual intervention, and avoid raw material accumulation.

[0014] 3. This utility model, by setting up an auxiliary mechanism, uses components such as worm gears and transmission rods to drive the sliding block and scraper to move back and forth. With the help of a cylinder to adjust the position of the scraper, the raw materials can be evenly spread, screen residue can be cleaned, screen clogging can be reduced, screening can be ensured smoothly, and the overall screening efficiency can be further improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main three-dimensional structure provided in an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of the sorting mechanism provided in this embodiment of the utility model; Figure 3 This is a three-dimensional structural diagram of the auxiliary mechanism provided in an embodiment of the present utility model; Figure 4 This is provided by the embodiment of the present utility model. Figure 3 Enlarged 3D structural diagram at point A.

[0016] In the diagram: 1. Screening box; 2. Feed hopper; 3. Horizontal plate; 4. Drive motor; 5. Sorting mechanism; 501. Worm gear; 502. Cam; 503. Push block; 504. Pressure rod; 505. First screening frame; 506. Limiting rod; 507. Guide plate; 508. Sector gear; 6. Auxiliary mechanism; 601. Worm wheel; 602. Transmission rod; 603. First bevel gear; 604. Second bevel gear; 605. Reciprocating screw; 606. Sliding block; 607. Cylinder; 608. Scraper; 7. First spring; 8. Matching rack; 9. Second screening frame; 10. Telescopic rod; 11. Second spring. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0021] Example 1 Reference Figure 1-4 This is the first embodiment of the present utility model, which provides a screening box 1, a feeding hopper 2, a horizontal plate 3 and a drive motor 4. The bottom of the feeding hopper 2 is fixedly connected to the top of the inner wall of the screening box 1, the bottom of the drive motor 4 is fixedly connected to the top of the horizontal plate 3, a sorting mechanism 5 is provided inside the screening box 1, and an auxiliary mechanism 6 is provided on one side of the screening box 1. The sorting mechanism 5 is used to screen the raw materials; Auxiliary mechanism 6 is used to level the raw materials.

[0022] Specifically, the feed hopper 2 can stably convey raw materials into the screening box 1, the drive motor 4 provides power for the operation of the device, the sorting mechanism 5 can efficiently screen the raw materials, replace manual screening, reduce reliance on manpower, and improve screening efficiency, the auxiliary mechanism 6 can flatten the raw materials in the screening box 1 to prevent the raw materials from accumulating in one place during screening, and at the same time, in conjunction with the sorting mechanism 5, it can also reduce the clogging of the screening screen, solve the problems of limited screening methods and slow speed, and ensure smooth screening work, reduce costs, and help improve production progress.

[0023] Furthermore, cement raw materials are first poured into the feed hopper 2, the bottom of which is fixedly connected to the top of the inner wall of the screening box 1, so that the raw materials can be stably transported into the screening box 1. The drive motor 4, which is fixedly connected to the top of the horizontal plate 3, provides power for the operation of the entire device after starting. Under the power of the drive motor 4, the sorting mechanism 5 in the screening box 1 efficiently screens the raw materials through the transmission and cooperation of internal components, separating the raw materials that meet and do not meet the specifications to replace the traditional manual screening. At the same time, the auxiliary mechanism 6 on one side of the screening box 1 starts synchronously, and flattens the raw materials during the screening process to avoid concentrated accumulation. The two work together to ensure stable screening, reduce screen blockage, and ensure that the screening work proceeds in an orderly manner.

[0024] Example 2 The second embodiment of this utility model provides a sorting mechanism 5 including a worm gear 501, a cam 502, a push block 503, a pressure rod 504, a first screening frame 505, a limiting rod 506, a guide plate 507, and a sector gear 508. The bottom of the worm gear 501 is fixedly connected to the top of the sector gear 508. The left side surface of the cam 502 is rotatably connected to the right side of the inner wall of the push block 503. The left side surface of the pressure rod 504 is fixedly connected to the right side surface of the first screening frame 505. The left side surface of the limiting rod 506 is fixedly connected to the right side surface of the screening box 1. Both ends of the guide plate 507 are fixedly connected to the inner wall of the screening box 1. The left side surface of the horizontal plate 3 is fixedly connected to the right side surface of the screening box 1. A first spring 7 is provided on the surface of the limiting rod 506, and both ends of the first spring 7 are fixedly connected to the surface of the limiting rod 506. The inner wall of the push block 503 is slidably connected to the outer wall of the limiting rod 506, driving... The output end of motor 4 is fixedly connected to the bottom of sector gear 508. A mating rack 8 is provided at the bottom of sector gear 508. A second screening frame 9 is provided on the left side surface of the mating rack 8. The bottom of sector gear 508 is meshed with the top of mating rack 8. The left side surface of mating rack 8 is fixedly connected to the right side surface of the second screening frame 9. A telescopic rod 10 is provided at the rear end of mating rack 8. The output end of telescopic rod 10 is fixedly connected to the rear end of mating rack 8. The right side surface of pressure rod 504 is fixedly connected to the left side surface of push block 503. The right side surface of worm gear 501 is meshed with the left side surface of worm wheel 601. A second spring 11 is provided on the surface of telescopic rod 10. The two ends of the second spring 11 are fixedly connected to the surface of telescopic rod 10. The front end of transmission rod 602 is fixedly connected to the rear end of first bevel gear 603. The left side surface of second bevel gear 604 is fixedly connected to the right side surface of reciprocating screw 605.

[0025] Specifically, the drive motor 4 drives the sector gear 508 to rotate, which meshes with the rack 8 to cause the second screening frame 9 to move left and right. With the buffer reset of the telescopic rod 10 and the second spring 11, the second screening frame 9 can reciprocate and screen. On the other hand, it drives the worm gear 501 to rotate, which is transmitted through the worm wheel 601, cam 502 and other components, causing the push block 503 to slide along the limit rod 506. With the first spring 7, it drives the pressure rod 504 to vibrate and screen the left side of the first screening frame 505. The dual screening structure, combined with the guide plate 507 to guide the material, further improves the screening efficiency and effect, replaces manual screening to reduce labor costs, avoids raw material accumulation, reduces the probability of screen blockage, and ensures continuous and stable screening.

[0026] Furthermore, the output of the drive motor 4 drives the sector gear 508 to rotate, and the worm gear 501 fixedly connected to the top of the sector gear 508 rotates accordingly. The right side of the worm gear 501 meshes with the worm wheel 601, providing power for subsequent transmission. At the same time, the bottom of the sector gear 508 meshes with the mating rack 8, driving the mating rack 8 to move left and right. The second screening frame 9 fixed to the left side of the mating rack 8 moves synchronously, and the telescopic rod 10 at the rear end of the mating rack 8 and the second spring 11 on its surface can buffer and reset, ensuring that the second screening frame 9 moves and screens stably. The sector gear 508 drives the worm gear 501 to rotate. Simultaneously, the worm gear 501, in conjunction with related components, causes the cam 502 to rotate. The left side of the cam 502 is rotatably connected to the right side of the inner wall of the push block 503, pushing the push block 503 to slide along the outer wall of the limit rod 506. The first spring 7 on the surface of the limit rod 506 assists the push block 503 in resetting. The pressure rod 504 fixed on the left side of the push block 503 then drives the first screening frame 505 to vibrate left and right, achieving double screening. The guide plate 507 guides the raw material to ensure that the raw material accurately enters the discharge area. The horizontal plate 3 provides stable support for the drive motor 4. The whole system works together to complete the raw material screening.

[0027] Example 3 The third embodiment of this utility model provides an auxiliary mechanism 6 including a worm gear 601, a transmission rod 602, a first bevel gear 603, a second bevel gear 604, a reciprocating screw 605, a sliding block 606, a cylinder 607, and a scraper 608. The inner wall of the worm gear 601 is rotatably connected to the outer wall of the transmission rod 602. The surface of the first bevel gear 603 is meshed with the surface of the second bevel gear 604. The surface of the reciprocating screw 605 is threadedly connected to the inner wall of the sliding block 606. The output end of the cylinder 607 is fixedly connected to the front end of the scraper 608, and the front end of the cylinder 607 is fixedly connected to the rear end of the sliding block 606.

[0028] Specifically, while the transmission rod 602 drives the worm gear 601 to rotate, it drives the first bevel gear 603 and the second bevel gear 604 to mesh and transmit power, causing the reciprocating screw 605 to rotate. This, in turn, drives the sliding block 606 to move back and forth along the screw. The cylinder 607 at the rear end of the sliding block 606 drives the scraper 608 to adjust its position back and forth. The scraper 608 moves synchronously with the sliding block 606, which can evenly spread the raw materials in the screening box 1, avoid local accumulation of raw materials during screening, and ensure full utilization of the screening area of ​​the sorting mechanism 5. In addition, the scraper 608 can also help clean the residual raw materials on the surface of the screen frame, further reducing the probability of screen frame blockage. Together with the sorting mechanism 5, it can improve the overall screening efficiency, reduce manual cleaning and maintenance costs, and ensure long-term continuous and stable operation of the device.

[0029] Furthermore, the worm 501 meshes with the worm wheel 601, driving the worm wheel 601 to rotate. Since the inner wall of the worm wheel 601 is rotatably connected to the outer wall of the transmission rod 602, the transmission rod 602 rotates synchronously with the worm wheel 601. The first bevel gear 603, fixedly connected to the front end of the transmission rod 602, rotates accordingly. The surface of the first bevel gear 603 meshes with that of the second bevel gear 604, thereby driving the second bevel gear 604 to rotate. The reciprocating screw 605 fixed to the left side of the second bevel gear 604 also rotates synchronously. Because the surface of the reciprocating screw 605 is screwed into the inner wall of the sliding block 606... When the reciprocating screw 605 rotates, it drives the sliding block 606 to reciprocate along the screw axis. The cylinder 607, which is fixedly connected to the rear end of the sliding block 606, moves synchronously. The cylinder 607 can adjust the front and rear position of the scraper 608 through the output end, so that the scraper 608 fits the screening area. The scraper 608, which moves with the sliding block 606, can evenly spread the raw materials in the screening box 1, avoid local accumulation of raw materials, and at the same time help clean the residual materials on the screen surface, so as to cooperate with the efficient screening of the sorting mechanism 5 and ensure the smoothness of the overall screening process.

[0030] Working principle: In operation, first, start the drive motor 4. Then, feed the cement product raw materials into the screening box 1 through the feed hopper 2. The output end of the drive motor 4 drives the sector gear 508 to rotate, and the worm 501 fixedly connected to the top of the sector gear 508 rotates accordingly. The right side of the worm 501 meshes with the worm wheel 601, providing power for subsequent transmission. At the same time, the bottom of the sector gear 508 meshes with the mating rack 8, driving the mating rack 8 to move left and right. The second screening frame 9 fixed to the left side of the mating rack 8 moves synchronously, and the telescopic rod 10 at the rear end of the mating rack 8 and the second spring 11 on its surface move in tandem. The buffered reset mechanism ensures stable movement and screening of the second screening frame 9. Simultaneously, the sector gear 508 drives the worm gear 501 to rotate, and the worm gear 501, in conjunction with related components, causes the cam 502 to rotate. The left side of the cam 502 is rotatably connected to the right side of the inner wall of the push block 503, pushing the push block 503 to slide along the outer wall of the limiting rod 506. The first spring 7 on the surface of the limiting rod 506 assists the push block 503 in resetting. The pressure rod 504 fixed to the left side of the push block 503 then drives the first screening frame 505 to vibrate left and right, achieving double screening. The guide plate 507 guides the raw materials, ensuring precise material selection. Upon entering the discharge area, the worm 501 meshes with the worm wheel 601, causing the worm wheel 601 to rotate. Since the inner wall of the worm wheel 601 is rotatably connected to the outer wall of the transmission rod 602, the transmission rod 602 rotates synchronously with the worm wheel 601. The first bevel gear 603, fixedly connected to the front end of the transmission rod 602, rotates accordingly. The first bevel gear 603 meshes with the surface of the second bevel gear 604, thereby driving the second bevel gear 604 to rotate. The reciprocating screw 605 fixed to the left side of the second bevel gear 604 also rotates synchronously. Because the surface of the reciprocating screw 605 is threadedly connected to the inner wall of the sliding block 606, the reciprocating... When the lead screw 605 rotates, it drives the sliding block 606 to reciprocate along the lead screw axis. The cylinder 607, which is fixedly connected to the rear end of the sliding block 606, moves synchronously. The cylinder 607 can adjust the front and rear position of the scraper 608 through the output end, so that the scraper 608 fits the screening area. The scraper 608, which moves with the sliding block 606, can evenly spread the raw material in the screening box 1, avoid local accumulation of raw material, and at the same time assist in cleaning the residual material on the screen surface, providing coordination for the efficient screening of the sorting mechanism 5, ensuring the smoothness of the overall screening process, and further improving the practicality and reliability of the overall device.

[0031] In summary, the sorting and auxiliary mechanisms enable efficient dual screening, uniform spreading, and cleaning of screen residues for raw materials used in cement product manufacturing. This reduces clogging and accumulation, lowers reliance on manual labor, effectively improves screening efficiency and raw material screening accuracy, and ensures stable production processes.

[0032] The screening box, feed hopper, and cross plate used in this application can be additionally equipped with protective measures of common knowledge in the field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0033] It should be noted that the drive motor, cylinder, guide vane, and scraper are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters, are all common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0034] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0035] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0036] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A raw material screening device for cement product manufacturing, comprising a screening box (1), a feeding hopper (2), a horizontal plate (3), and a drive motor (4), wherein the bottom of the feeding hopper (2) is fixedly connected to the top of the inner wall of the screening box (1), and the bottom of the drive motor (4) is fixedly connected to the top of the horizontal plate (3), characterized in that: The screening box (1) is equipped with a sorting mechanism (5), and an auxiliary mechanism (6) is provided on one side of the screening box (1). The sorting mechanism (5) is used to screen the raw materials; The auxiliary mechanism (6) is used to level the raw materials.

2. A raw material screening device for manufacturing a cement product according to claim 1, characterized in that: The sorting mechanism (5) includes a worm (501), a cam (502), a push block (503), a pressure rod (504), a first screening frame (505), a limiting rod (506), a guide plate (507), and a sector gear (508). The bottom of the worm (501) is fixedly connected to the top of the sector gear (508). The left side surface of the cam (502) is rotatably connected to the right side of the inner wall of the push block (503). The left side surface of the pressure rod (504) is fixedly connected to the right side surface of the first screening frame (505). The left side surface of the limiting rod (506) is fixedly connected to the right side surface of the screening box (1). Both ends of the guide plate (507) are fixedly connected to the inner wall of the screening box (1). The left side surface of the horizontal plate (3) is fixedly connected to the right side surface of the screening box (1).

3. A raw material screening device for manufacturing a cement product according to claim 2, characterized in that: The auxiliary mechanism (6) includes a worm gear (601), a transmission rod (602), a first bevel gear (603), a second bevel gear (604), a reciprocating screw (605), a sliding block (606), a cylinder (607), and a scraper (608). The inner wall of the worm gear (601) is rotatably connected to the outer wall of the transmission rod (602). The surface of the first bevel gear (603) is meshed with the surface of the second bevel gear (604). The surface of the reciprocating screw (605) is threadedly connected to the inner wall of the sliding block (606). The output end of the cylinder (607) is fixedly connected to the front end of the scraper (608), and the front end of the cylinder (607) is fixedly connected to the rear end of the sliding block (606).

4. A raw material screening device for manufacturing a cement product according to claim 3, characterized in that: The limiting rod (506) is provided with a first spring (7) at its surface. The two ends of the first spring (7) are fixedly connected to the surface of the limiting rod (506). The inner wall of the pushing block (503) is slidably connected to the outer wall of the limiting rod (506). The output end of the drive motor (4) is fixedly connected to the bottom of the sector gear (508).

5. A raw material screening device for manufacturing a cement product according to claim 4, characterized in that: The bottom of the sector gear (508) is provided with a mating rack (8), and the left side surface of the mating rack (8) is provided with a second screening frame (9). The bottom of the sector gear (508) is meshed with the top of the mating rack (8), and the left side surface of the mating rack (8) is fixedly connected to the right side surface of the second screening frame (9).

6. A raw material screening device for manufacturing a cement product according to claim 5, characterized in that: The rear end of the mating rack (8) is provided with a telescopic rod (10), the output end of the telescopic rod (10) is fixedly connected to the rear end of the mating rack (8), the right side surface of the pressure rod (504) is fixedly connected to the left side surface of the push block (503), and the right side surface of the worm (501) is meshed with the left side surface of the worm wheel (601).

7. A raw material screening device for manufacturing a cement product according to claim 6, characterized in that: The telescopic rod (10) is provided with a second spring (11), and the two ends of the second spring (11) are fixedly connected to the surface of the telescopic rod (10). The front end of the transmission rod (602) is fixedly connected to the rear end of the first bevel gear (603), and the left side surface of the second bevel gear (604) is fixedly connected to the right side surface of the reciprocating screw (605).

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