Cement grinding device with multi-stage powder screening and selecting function

Abstract

The utility model relates to the technical field of cement grinding treatment, in particular to a cement grinding device with a multi-stage powder screening and selecting function, which comprises a grinding box and a screening mechanism, the grinding box comprises a feeding area, a first grading grinding area, a second grading grinding area and a discharging area, the grinding box is provided with the feeding area, and the screening mechanism is arranged in the discharging area. A first grading grinding area extends from the bottom of the inner side of the feeding area, a second grading grinding area is arranged at the bottom of the first grading grinding area, and a discharging area is arranged at the bottom of the grinding box; a scraping plate is arranged in the second grading grinding area, the screening mechanism comprises a screening plate arranged in the second grading grinding area, and the screening plate can be opened; the device solves the problems that in the prior art, when an existing device conducts grading treatment, dust is prone to being accumulated in the device, especially on a screening net, after the screening net conducts screening, the screening net and the interior of the device are inconvenient to clean, the efficiency is low during grading grinding, and the screening efficiency is affected.

Description

Technical Field

[0001] This utility model belongs to the field of cement grinding technology, and in particular relates to a cement grinding device with multi-stage screening and powder selection function. Background Technology

[0002] In cement production, cement raw materials need to be graded and ground, thus requiring a grading and grinding device for cement production.

[0003] Existing equipment tends to accumulate dust inside during grading, making it difficult to clean the screen and its interior after screening. This results in low grading and grinding efficiency, impacting screening effectiveness.

[0004] In view of this, the applicant has studied and improved the existing structure and its shortcomings, and proposed a cement grinding device with a multi-stage screening and powder selection function that can reduce the accumulation of internal dust. Utility Model Content

[0005] The purpose of this invention is to provide a cement grinding device with multi-stage screening and powder selection functions to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cement grinding device with multi-stage screening and powder selection function, comprising a grinding box and a rotary screening mechanism, wherein the grinding box includes a feeding area, a first-stage grinding area, a second-stage grinding area and a discharge area, wherein the feeding area is provided at the top corner of the grinding box, and the first-stage grinding area extends from the bottom inner side of the feeding area, and the second-stage grinding area extends obliquely from the bottom of the first-stage grinding area, and the discharge area is provided at the bottom of the grinding box;

[0007] A first grinding element is embedded in the inner side of the first graded grinding area and a second grinding element is embedded in the inner side of the second graded grinding area and a scraper is provided on the opposite side of the second grinding element. The second grinding element is arranged in a fan shape in cross-section, and the second grinding element and the scraper are welded together.

[0008] A rotary screening mechanism is provided at the bottom opening of the second grading and grinding area. The rotary screening mechanism includes a screening plate, an extended end, a cleaning head, and a shaft-connected telescopic liquid rod. An extended end is provided at one end of the inner side of the screening plate, and a shaft-connected telescopic liquid rod is movably connected between the inner side of the extended end and the discharge area. A cleaning head is provided on the outer side of the extended end.

[0009] A conveyor belt is horizontally installed at the bottom of the discharge area.

[0010] Furthermore, the feeding area, the first classifying and grinding area, the second classifying and grinding area, and the discharging area are interconnected.

[0011] Furthermore, the shaft end of the first grinding element is connected to a first drive motor, and the shaft ends of the second grinding element and the scraper are connected to a second drive motor.

[0012] Furthermore, the axially connected telescopic liquid rod drives the screening plate to rotate, and the rotation of the screening plate causes the cleaning head and the conveyor belt to come into contact.

[0013] Furthermore, a maintenance and cleaning port is provided on the side of the discharge area near the screening plate, and a detachable buckle plate is installed on the inner side of the maintenance and cleaning port.

[0014] Furthermore, the first grinding element has a cylindrical structure, and the inner wall dimension of the first graded grinding area and the arc surface dimension of the first grinding element are matched with each other.

[0015] Furthermore, the second grinding element and the scraper are respectively matched with the arc surface dimensions of the second graded grinding area.

[0016] Furthermore, the openings of the first and second graded grinding areas are provided with separation protrusions, which can scrape off the raw material on the outer wall of the first grinding element, so that the raw material falls completely into the second graded grinding area.

[0017] This utility model provides a cement grinding device with multi-stage screening and powder selection function, which has the following beneficial effects:

[0018] 1. In this utility model, the inner wall of the grinding channel of the grinding box is set with an arc surface structure. The first and second grade grinding areas are used as the main grinding areas. The first grinding element located in the first grade grinding area is used to perform primary grinding of cement materials. During grinding, the raw materials after grinding are transferred to the second grade grinding area for secondary grinding through the opening between the first and second grade grinding areas, so as to improve the grinding effect.

[0019] Separation protrusions are provided at the openings of the first and second grade grinding areas to prevent the raw material from rotating on the outer wall of the first grinding element, so that the raw material falls completely into the second grade grinding area and reduces the adhesion of the raw material.

[0020] The second grinding element in the second stage grinding area is arranged in a fan shape in cross-section, and a scraper is provided on the opposite side. It rotates synchronously with the second grinding element and can scrape and grind the cement raw materials simultaneously during grinding, further reducing the stockpiling of materials.

[0021] 2. In this utility model, a screening plate is provided at the bottom of the second grinding component, which can support the raw material that has reached the particle density after grinding to pass through the screening plate and fall onto the bottom conveyor belt for collection.

[0022] Furthermore, the screening plate supports rotation around an axis on one side, and with the drive components that are movable on both sides, the rotation and unfolding of the screening plate can be remotely controlled, thereby opening the second grading and grinding zone and achieving the effect of grading and discharging.

[0023] The screen plate has an extended end on one side of its rotation. A cleaning head is provided on the outside of the extended end. When the screen plate rotates, the cleaning head can be driven to rotate to the surface of the conveyor belt. Thus, the movement of the conveyor belt is used to wipe and clean the surface of the conveyor belt. The structure and control logic are simple, and the equipment has high reliability and stability. Attached Figure Description

[0024] The disclosure of this utility model will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are merely illustrative of the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. In the drawings:

[0025] Figure 1 This is a schematic diagram of the internal structure of a cement grinding device with multi-stage screening and powder selection function according to the present invention.

[0026] Figure 2 This is a schematic diagram of the rotary screening mechanism of a cement grinding device with multi-stage screening and powder selection function according to the present invention.

[0027] Figure 3 This is a side view of a cement grinding device with multi-stage screening and powder selection function according to the present invention.

[0028] In the diagram: 1. Grinding box; 101. Feeding area; 102. First-stage grinding area; 103. Second-stage grinding area; 104. Discharge area; 2. First drive motor; 3. Second drive motor; 4. Maintenance and cleaning port; 5. Detachable buckle plate; 6. Conveyor belt; 7. Rotary screening mechanism; 701. Screening plate; 702. Extended end; 703. Cleaning head; 704. Shaft-connected telescopic liquid rod; 8. First grinding component; 9. Second grinding component; 10. Scraper; 11. Separation protrusion. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-3 This utility model provides a technical solution: a cement grinding device with multi-stage screening and powder selection function, including a grinding box 1 and a rotary screening mechanism 7. The grinding box 1 includes a feeding area 101, a first-stage grinding area 102, a second-stage grinding area 103 and a discharge area 104. The feeding area 101 is provided at the top corner of the grinding box 1, and the first-stage grinding area 102 extends from the bottom inner side of the feeding area 101. The second-stage grinding area 103 extends obliquely from the bottom of the first-stage grinding area 102. The discharge area 104 is provided at the bottom of the grinding box 1.

[0031] The first grinding component 8 is embedded in the inner side of the first graded grinding area 102 and is connected to the shaft. The second grinding component 9 is embedded in the inner side of the second graded grinding area 103 and is connected to the shaft. A scraper 10 is provided on the opposite side of the second grinding component 9. The scraper 10 is coaxially fixed on the rotating shaft of the second grinding component. The second grinding component 9 is fan-shaped in cross-section, and the second grinding component 9 and the scraper 10 are welded together.

[0032] A rotary screening mechanism 7 is provided at the bottom opening of the second graded grinding area 103. The rotary screening mechanism 7 includes a screening plate 701, an extension end 702, a cleaning head 703, and a drive assembly. The drive assembly can be a shaft-connected telescopic liquid rod 704. An extension end 702 is provided at one end of the inner side of the screening plate 701, and a shaft-connected telescopic liquid rod 704 is movably shaft-connected between the inner side of the extension end 702 and the discharge area 104. A cleaning head 703 is provided on the outer side of the extension end 702. Preferably, the cleaning head can be made of an elastic material to reduce hard friction, such as rubber.

[0033] A conveyor belt 6 is horizontally installed at the bottom of the discharge area 104; the feeding area 101, the first classifying grinding area 102, the second classifying grinding area 103, and the discharge area 104 are interconnected; the shaft end of the first grinding component 8 is connected to a first drive motor 2, and the shaft ends of the second grinding component 9 and the scraper 10 are connected to a second drive motor 3; the shaft-connected telescopic liquid rod 704 drives the screening plate 701 to rotate, and the rotation of the screening plate 701 causes the cleaning head 703 to contact the conveyor belt 6; a maintenance and cleaning port 4 is opened on the side of the discharge area 104 near the screening plate 701, and a detachable buckle plate 5 is installed on the inner side of the maintenance and cleaning port 4; the first grinding component 8 has a cylindrical structure, and the inner wall dimension of the first classifying grinding area 102 and the arc surface dimension of the first grinding component 8 are matched; the second grinding component 9 and the scraper 10 are respectively matched with the arc surface dimensions of the second classifying grinding area 103.

[0034] The inner wall of the grinding channel of the grinding box 1 is set with an arc surface structure. The first grade grinding area 102 and the second grade grinding area 103 are used as the main grinding areas. The first grinding element 8 located in the first grade grinding area 102 is used to perform primary grinding of cement materials. During grinding, the ground raw materials are transferred to the second grade grinding area 103 for secondary grinding through the opening between the first grade grinding area 102 and the second grade grinding area 103, so as to improve the grinding effect.

[0035] Separation protrusions 11 are provided at the openings of the first graded grinding area 102 and the second graded grinding area 103, which can prevent the raw material from rotating on the outer wall of the first grinding element 8, so that the raw material falls completely into the second graded grinding area 103, reducing the adhesion of the raw material.

[0036] The second grinding element 9 in the second grade grinding zone 103 is arranged in a fan shape in cross-section, and a scraper 10 is provided on the opposite side. It rotates synchronously with the second grinding element 9 and can scrape and grind the cement raw materials synchronously during grinding.

[0037] The bottom of the second grinding component 9 is provided with a screening plate 701, which can support the raw material that has reached the particle density after grinding to pass through the screening plate 701 and fall onto the bottom conveyor belt 6 for collection.

[0038] Furthermore, the screening plate 701 supports rotation around an axis on one side, and with the movable shaft-connected telescopic liquid rods 704 on both sides, the screening plate 701 can be remotely controlled to rotate and unfold, thereby opening the second grading and grinding zone 103 and achieving the grading and discharge effect.

[0039] The screening plate 701 has an extension end 702 extending from one side of its rotation. A cleaning head 703 is provided on the outside of the extension end 702. The cleaning head is located at the end of the screening plate away from its hinge axis that can be opened. When the screening plate 701 rotates, it can drive the cleaning head 703 to rotate to the surface of the conveyor belt 6. When the screening plate 701 is opened, the cleaning head 703 can overlap the surface of the conveyor belt 6, thereby using the movement of the conveyor belt to achieve wiping and cleaning of the surface of the conveyor belt. The structure and control logic are simple, and the equipment has high reliability and stability.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the technical scope disclosed in this utility model without creative effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope defined in the claims.

Claims

1. A cement grinding device with multi-stage screening and powder selection function, comprising a grinding box (1) and a rotary screening mechanism (7), characterized in that: The grinding box (1) includes a feeding area (101), a first-stage grinding area (102), a second-stage grinding area (103), and a discharge area (104), wherein the first-stage grinding area (102), the second-stage grinding area (103), and the discharge area (104) are connected vertically in sequence. A first grinding component (8) is provided in the first graded grinding area, and a second grinding component (9) is embedded in the inner side of the second graded grinding area (103) and connected to the shaft. A scraper (10) is coaxially fixed on the rotating shaft of the second grinding component. The rotary screening mechanism (7) is located at the opening of the discharge area of ​​the second graded grinding area (103). The rotary screening mechanism includes a screening plate (701) hinged to the second graded grinding area (103) and a driving component. The driving component is used to drive the screening plate to open / close the opening of the discharge area of ​​the second graded grinding area (103).

2. The cement grinding device with multi-stage screening and powder selection function according to claim 1, characterized in that, The bottom of the discharge area (104) is horizontally provided with a conveyor belt (6), and the rotary screening mechanism (7) also includes a cleaning head (703). The cleaning head is located at the end of the screening plate away from its hinge axis that can be opened. When the screening plate (701) is opened, the cleaning head (703) can overlap the surface of the conveyor belt (6).

3. A cement grinding device with multi-stage screening and powder selection function according to claim 1, characterized in that, The first grinding part (8) is connected to a first drive motor (2) at the shaft end, and the second grinding part (9) and the scraper (10) are connected to a second drive motor (3) at the shaft end.

4. A cement grinding device with multi-stage screening and powder selection function according to claim 1, characterized in that, The discharge area (104) has a maintenance and cleaning port (4) on the side near the screening plate (701), and a detachable buckle plate (5) is installed on the inner side of the maintenance and cleaning port (4).

5. A cement grinding device with multi-stage screening and powder selection function according to claim 1, characterized in that, The first grinding part (8) has a cylindrical structure, and the inner wall size of the first graded grinding area (102) and the arc surface size of the first grinding part (8) are matched.

6. A cement grinding device with multi-stage screening and powder selection function according to claim 1, characterized in that, The second grinding part (9) and the scraper (10) are respectively matched with the arc dimensions of the second graded grinding area (103).

7. A cement grinding device with multi-stage screening and powder selection function according to claim 1, characterized in that, Separation protrusions (11) are provided at the openings of the first graded grinding area (102) and the second graded grinding area (103), which can scrape off the raw material on the outer wall of the first grinding part (8) so that the raw material falls completely into the second graded grinding area (103).

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