Cement grinding device for cement production
By designing a cement grinding device, the initial grinding is performed using the rotating shaft and grinding ball, and the grinding screen assembly and the upper grinding disc are performed for secondary grinding, which solves the problem of cement grinding that requires multiple treatments and precise feeding, and achieves efficient and one-time completion of cement grinding.
Patent Information
- Application Number
- CN202520329861.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2035-02-27
AI Technical Summary
The cement grinding operation requires multiple grindings to achieve a sufficient particle size, and precise fixed-point feeding is required during grinding. After grinding, the cement powder is difficult to gather again for further grinding.
A cement grinding device for cement production is designed, including a grinding box, grinding screen assembly, an upper grinding disc and a rotating shaft. The grinding ball is driven by the shaft to perform the initial grinding, the grinding screen assembly and the upper grinding disc are secondary grinding, and the cement material scattered around is scraped and re-injected into the grinding process using arc-shaped scraping strips.
The cement grinding is achieved in one-time, solving the problems of multiple grinding and precise feeding, improving grinding efficiency and reducing costs.
Smart Images
Figure CN222678307U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cement production, in particular to a cement grinding device for cement production. Background Art
[0002] Cement: Powdered hydraulic inorganic cementitious material. After adding water and stirring, it becomes a slurry, which can harden in the air or in water, and can firmly cement materials such as sand and stone together. The most basic chemical reaction in cement production is the decomposition of calcium carbonate at 900°C to produce calcium oxide and carbon dioxide; this process is called decomposition. It is followed by the sintering process, that is, calcium oxide reacts with clay, bauxite and ferrous oxide under high temperature conditions (1400~1500°C) to form calcium silicate, calcium aluminate and calcium alumina ferroferrate, which form clinker. Clinker is ground together with gypsum and other additives to produce cement. Therefore, cement grinding is an indispensable process, but it still has the following disadvantages in actual grinding operations:
[0003] 1. Usually, cement grinding operations require multiple grindings, that is, after grinding once, the cement is collected and then put back into the grinding device for grinding again. This process requires multiple grindings to obtain a sufficient particle size, which is very time-consuming and cannot be completed in one go.
[0004] 2. Secondly, for cement grinding, grinding discs, grinding rollers and other structures are usually used for grinding. However, when feeding materials, such structures need to be accurately placed in the designated position for grinding. If they touch other positions, they will cause spillage and lose the grinding effect. Moreover, for grinding disc structures, after grinding once, the cement powder will spread out to the surroundings and it is difficult to gather again. Utility Model Content
[0005] The purpose of the utility model is to provide a cement grinding device for cement production. By arranging a rotating shaft, a grinding box, an upper grinding disc, and a grinding and screening component, the utility model solves the problems that cement grinding operations require multiple grinding processes, it is impossible to grind to a sufficient particle size in one go, and that cement grinding requires precise point feeding, and it is difficult for a grinding disc structure to gather and grind unqualified cement powder again when grinding cement.
[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:
[0007] The utility model discloses a cement grinding device for cement production, comprising a grinding box, a grinding and screening assembly, an upper grinding disc and a rotating shaft, wherein a grinding chamber is arranged at the bottom of the grinding box, and a through slot is provided in the grinding box above the grinding chamber, and a rotating shaft which transversely passes through the center of the through slot is also rotatably connected in the grinding box, a grinding ball is fixed to the outer periphery of the middle part of the rotating shaft, and grinding teeth which are equidistantly distributed are arranged on the outer spherical surface of the grinding ball, a grinding and screening assembly is arranged at the bottom end of the grinding chamber, and an upper grinding disc is arranged above the grinding and screening assembly;
[0008] The grinding and screening assembly comprises a ring frame and a lower grinding disc, the ring frame and the lower grinding disc are fixed with connecting rods distributed in a ring array, and a screen is fixed between two of the connecting rods;
[0009] A cone head is fixed on the upper end of the upper grinding disc, two arc-shaped scraping strips which are centrally symmetrical are fixed on the outer periphery of the upper grinding disc, and a notch is provided on the outer periphery of the upper grinding disc near the inner arc surface of the arc-shaped scraping strip.
[0010] Furthermore, a through feeding hopper is fixed to the upper end of the grinding box above the through slot, and legs inclined toward the center of the grinding box are fixed to both sides of the grinding box.
[0011] Furthermore, the lower part of the grinding chamber passes through the bottom end of the grinding box, and the ring frame and the bottom end of the lower grinding plate are flush with the lower end of the grinding box; a grinding motor is fixed to the bottom surface of the lower grinding plate, and the output shaft of the grinding motor passes through the lower grinding plate and is fixedly connected to the center of the bottom surface of the upper grinding plate.
[0012] Furthermore, a ball groove is provided in the grinding box at the center of the through groove, the grinding ball at the center of the rotating shaft is located in the ball groove, and the grinding teeth do not contact the ball groove, and the inner spherical surface of the ball groove is the grinding surface.
[0013] Furthermore, two bearings are embedded and fixed in both side walls of the grinding box, and the two bearings are on the same horizontal line with the center of the through groove, the two ends of the rotating shaft are rotatably connected to the two bearings, a grinding motor is fixed on one side wall of the grinding box, and the output shaft of the grinding motor is connected to one end close to the rotating shaft.
[0014] Furthermore, the outer wall of the ring frame is fixed to the edge of the inner bottom end of the grinding chamber, and the inner and outer arc surfaces of the screen are respectively fixed to the outer wall of the lower grinding disc and the inner wall of the ring frame.
[0015] Furthermore, the upper grinding disc is located above the lower grinding disc, and the bottom surface of the upper grinding disc and the top surface of the lower grinding disc are grinding surfaces and contact each other, and one end of the arc scraper away from the upper grinding disc contacts the inner wall of the grinding chamber.
[0016] The utility model has the following beneficial effects:
[0017] 1. The utility model solves the problem that cement grinding operation needs multiple grinding processes and cannot be ground to a sufficient particle size at one time by arranging a rotating shaft, a grinding box, an upper grinding disc, and a grinding and screening component. When grinding cement, it is put into the hopper and enters the through groove and the ball groove. The rotation of the rotating shaft drives the rotation of the grinding balls, and the cement material in the ball groove is ground into powder of a certain particle size, and then falls into the grinding chamber. At this time, the grinding and screening component and the upper grinding disc cooperate to perform a secondary grinding process on the cement material. The cement material enters between the upper grinding disc and the lower grinding disc to grind the cement material. At the same time, the cement material scattered around continues to move toward between the upper grinding disc and the lower grinding disc under the rotation of the upper grinding disc and the scraping of the arc-shaped scraper, until the powder ground into a sufficient particle size falls from the screen, and the one-time grinding is completed.
[0018] 2. The utility model solves the problem that it is necessary to accurately feed materials at a fixed point when grinding cement, and it is difficult to gather unqualified cement powder for grinding again when the grinding disc grinds cement; during the grinding process, cement materials are fed in from above, first pass through the through slot and the ball slot, and are ground by the grinding balls once. The materials pass through the through slot, and grinding balls are set on the necessary path for grinding. There is no need for accurate feeding, and then the upper grinding disc and the lower grinding disc are used for grinding. The materials are placed in the grinding room. At this time, the upper grinding disc rotates and the lower grinding disc does not move. Even if part of the materials falls on the cone head, they will slowly slide down and enter the screen. At this time, the rotation of the upper grinding disc drives the rotation of the arc scraper, and the scattered materials around are scraped along the inner arc surface of the arc scraper, enter the recess, and then enter between the upper grinding disc and the lower grinding disc for grinding. The ground materials leak out from the gap between the upper grinding disc and the lower grinding disc, and enter the screen. The qualified materials are screened out by the screen, and the unqualified materials are scraped out again by the arc scraper and ground again. Therefore, there is no need for precise feeding. The unqualified materials after grinding can also be gathered again for grinding again until they are ground into qualified materials and screened out by the screen. It has high practical value and high efficiency, saves time and processes, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.
[0020] Figure 1 A three-dimensional diagram of a cement grinding device for cement production;
[0021] Figure 2 A bottom-up perspective view of a cement grinding device for cement production;
[0022] Figure 3 This is a diagram showing the connection between the grinding box and its internal structure after cutting;
[0023] Figure 4 is a cross-sectional view of a grinding box;
[0024] Figure 5 It is a connection diagram between the grinding and screening assembly and the upper grinding disc;
[0025] Figure 6 It is the structural diagram of the grinding and screening assembly;
[0026] Figure 7 This is a bottom view of the upper grinding disc.
[0027] Reference numerals:
[0028] 1. Grinding box; 101. Feed hopper; 102. Support legs; 103. Through slot; 104. Ball slot; 105. Grinding chamber; 106. Bearing; 2. Grinding motor; 3. Grinding motor; 4. Grinding screening assembly; 401. Ring frame; 402. Lower grinding disc; 403. Screen; 404. Connecting rod; 5. Upper grinding disc; 501. Cone head; 502. Curved scraper strip; 503. Notch; 6. Rotating shaft; 601. Grinding balls; 602. Grinding teeth. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0030] See also Figure 1-7 As shown, the utility model is a cement grinding device for cement production, comprising a grinding box 1, a grinding and screening assembly 4, an upper grinding disc 5 and a rotating shaft 6, a grinding chamber 105 is arranged at the bottom of the grinding box 1, and a through slot 103 is provided in the grinding box 1 above the grinding chamber 105, a rotating shaft 6 which is rotatably connected to the grinding box 1 and passes through the center of the through slot 103 in a transverse direction, a grinding ball 601 is fixed to the outer periphery of the middle part of the rotating shaft 6, and grinding teeth 602 which are equidistantly distributed are arranged on the outer spherical surface of the grinding ball 601;
[0031] A through hopper 101 is fixed to the upper end of the grinding box 1 above the through slot 103, and legs 102 are fixed on both sides of the grinding box 1 and are tilted toward the center of the grinding box 1; the grinding box 1 is stably supported by the legs 102, and cement material is fed from the hopper 101. A ball groove 104 is provided in the grinding box 1 at the center of the through slot 103, and the grinding ball 601 at the center of the rotating shaft 6 is located in the ball groove 104, and the grinding teeth 602 do not contact the ball groove 104, and the inner spherical surface of the ball groove 104 is the grinding surface;
[0032] The grinding box 1 is used as a grinding place for cement. The cement material to be ground enters the through groove 103 and then enters the ball groove 104. At this time, the rotating shaft 6 rotates, driving the grinding balls 601 in the middle to rotate, and the grinding teeth 602 and the like contact the cement material, and the grinding surface of the ball groove 104 performs the initial grinding process on the cement material. Because the radius of the ball groove 104 is larger than the radius of the through groove 103, the cement material must fully pass through the grinding balls 601 before it can fall, so it must be thoroughly ground once and will not fall to other places.
[0033] A grinding and screening assembly 4 is disposed at the bottom of the grinding chamber 105, and an upper grinding disc 5 is disposed above the grinding and screening assembly 4;
[0034] The grinding and screening assembly 4 includes a ring frame 401 and a lower grinding disc 402. The ring frame 401 and the lower grinding disc 402 are fixed with connecting rods 404 distributed in a ring array, and a screen 403 is fixed between the two connecting rods 404.
[0035] By using the grinding and screening assembly 4 and the upper grinding disc 5, the cement material is subjected to a second or even multiple grinding treatment. The ring frame 401 and the lower grinding disc 402 are fixed into a whole by a connecting rod 404, and a screen 403 is arranged between every two adjacent connecting rods 404. The cement material enters the upper grinding disc 5 and the lower grinding disc 402 for grinding treatment. The ground material leaks out from the gap between the upper grinding disc 5 and the lower grinding disc 402 and enters the screen 403. The qualified material is screened out by the screen 403.
[0036] A cone head 501 is fixed to the upper end of the upper grinding disc 5, and two arc-shaped scraping strips 502 are fixed to the outer periphery of the upper grinding disc 5 in a centrally symmetrical manner, and a notch 503 is provided on the outer periphery of the upper grinding disc 5 near the inner arc surface of the arc-shaped scraping strip 502;
[0037] When the upper grinding disc 5 rotates, the cone head 501 above it and the arc scraper strip 502 on the side rotate accordingly. When part of the material falls on the cone head 501, it will slowly slide down and enter the screen 403. The rotation of the arc scraper strip 502 scrapes the scattered materials around along the inner arc surface of the arc scraper strip 502, enters the recess 503, and then enters between the upper grinding disc 5 and the lower grinding disc 402 for grinding.
[0038] The lower part of the grinding chamber 105 passes through the bottom end of the grinding box 1, and the bottom ends of the ring frame 401 and the lower grinding disc 402 are flush with the lower end of the grinding box 1; a grinding motor 3 is fixed to the bottom surface of the lower grinding disc 402, and the output shaft of the grinding motor 3 passes through the lower grinding disc 402 and is fixedly connected to the center of the bottom surface of the upper grinding disc 5; the grinding motor 3 works to drive the upper grinding disc 5 to rotate, and the cement powder passing through the screen 403 falls directly and is collected by external equipment.
[0039] Two bearings 106 are embedded and fixed in the two side walls of the grinding box 1, and the two bearings 106 are on the same horizontal line as the center of the through slot 103. The two ends of the rotating shaft 6 are rotatably connected to the two bearings 106. A grinding motor 2 is fixed on one side wall of the grinding box 1, and the output shaft of the grinding motor 2 is connected to one end close to the rotating shaft 6.
[0040] The bearing 106 is used to install the rotating shaft 6 and assist the stable rotation of the rotating shaft 6, and the grinding motor 2 is used to drive the rotating shaft 6 to rotate.
[0041] The outer wall of the ring frame 401 is fixed to the edge of the inner bottom end of the grinding chamber 105, and the inner and outer arc surfaces of the screen 403 are fixed to the outer wall of the lower grinding disc 402 and the inner wall of the ring frame 401 respectively;
[0042] The upper grinding disc 5 is located above the lower grinding disc 402 , and the bottom surface of the upper grinding disc 5 and the top surface of the lower grinding disc 402 are grinding surfaces and contact each other, and one end of the arc scraper 502 away from the upper grinding disc 5 contacts the inner wall of the grinding chamber 105 .
[0043] The specific working principle of the utility model is as follows: first, the support legs 102 are used to stably support the grinding box 1, and the cement material to be ground is put into the hopper 101, enters the through groove 103, and then enters the ball groove 104. At this time, the grinding motor 2 drives the rotating shaft 6 to rotate, driving the grinding balls 601 in the middle to rotate, and cooperates with the grinding teeth 602 and the like to contact the cement material, and the grinding surface of the ball groove 104 to perform the initial grinding treatment on the cement material. After passing through the grinding balls 601, it falls into the grinding chamber 105 through the through groove 103. At this time, the grinding motor 3 works to drive the upper grinding disc 5 to rotate, and the lower grinding disc 402 does not move. Even if part of the material falls on the cone head 501, it is It will slowly slide down and enter the screen 403. The rotation of the upper grinding disc 5 drives the rotation of the arc scraper 502, and the scattered materials around are scraped along the inner arc surface of the arc scraper 502, enter the recess 503, and then enter between the upper grinding disc 5 and the lower grinding disc 402 for grinding. The ground materials leak out from the gap between the upper grinding disc 5 and the lower grinding disc 402 and enter the screen 403. The qualified ones are screened by the screen 403, and the unqualified ones are scraped again by the arc scraper 502 (the rotation of the arc scraper 502 also helps to move and screen the cement materials on the screen 403), and are ground again until all the cement materials pass through the screen 403 and the grinding is completed.
[0044] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.
Claims
1. A cement grinding device for cement production, comprising a grinding box (1), a grinding and screening assembly (4), an upper grinding disc (5) and a rotating shaft (6), characterized in that: A grinding chamber (105) is arranged at the bottom of the grinding box (1), and a through slot (103) is provided in the grinding box (1) above the grinding chamber (105). A rotating shaft (6) is rotatably connected to the grinding box (1) and transversely passes through the center of the through slot (103). A grinding ball (601) is fixed to the outer periphery of the middle part of the rotating shaft (6), and grinding teeth (602) are arranged at equal intervals on the outer spherical surface of the grinding ball (601). A grinding and screening assembly (4) is arranged at the bottom end of the grinding chamber (105), and an upper grinding disc (5) is arranged above the grinding and screening assembly (4); The grinding and screening assembly (4) comprises a ring frame (401) and a lower grinding disc (402), the ring frame (401) and the lower grinding disc (402) are fixed with connecting rods (404) distributed in a ring array, and a screen (403) is fixed between two connecting rods (404); A cone head (501) is fixed to the upper end of the upper grinding disc (5), two centrally symmetrical arc-shaped scraping strips (502) are fixed to the outer periphery of the upper grinding disc (5), and a notch (503) is provided on the outer periphery of the upper grinding disc (5) near the inner arc surface of the arc-shaped scraping strips (502).
2. A cement grinding device for cement production according to claim 1, characterized in that: A through-feed hopper (101) is fixed to the upper end of the grinding box (1) above the through slot (103), and legs (102) are fixed on both sides of the grinding box (1) and are arranged obliquely toward the center of the grinding box (1).
3. A cement grinding device for cement production according to claim 1, characterized in that: The lower part of the grinding chamber (105) passes through the bottom end of the grinding box (1), and the bottom ends of the ring frame (401) and the lower grinding disc (402) are flush with the lower end of the grinding box (1); a grinding motor (3) is fixed to the bottom surface of the lower grinding disc (402), and the output shaft of the grinding motor (3) passes through the lower grinding disc (402) and is fixedly connected to the center of the bottom surface of the upper grinding disc (5).
4. A cement grinding device for cement production according to claim 1, characterized in that: A ball groove (104) is provided in the grinding box (1) at the center of the through groove (103); the grinding ball (601) at the center of the rotating shaft (6) is located in the ball groove (104); the grinding teeth (602) do not contact the ball groove (104); and the inner spherical surface of the ball groove (104) is a grinding surface.
5. A cement grinding device for cement production according to claim 4, characterized in that: Two bearings (106) are embedded and fixed in the two side walls of the grinding box (1), and the two bearings (106) are located on the same horizontal line as the center of the through groove (103). The two ends of the rotating shaft (6) are rotatably connected to the two bearings (106). A grinding motor (2) is fixed on one side wall of the grinding box (1), and the output shaft of the grinding motor (2) is connected to an end close to the rotating shaft (6).
6. A cement grinding device for cement production according to claim 1, characterized in that: The outer wall of the ring frame (401) is fixed to the edge of the inner bottom end of the grinding chamber (105), and the inner and outer arc surfaces of the screen (403) are respectively fixed to the outer wall of the lower grinding disc (402) and the inner wall of the ring frame (401).
7. A cement grinding device for cement production according to claim 1, characterized in that: The upper grinding disc (5) is located above the lower grinding disc (402), and the bottom surface of the upper grinding disc (5) and the top surface of the lower grinding disc (402) are grinding surfaces and contact each other, and the end of the arc-shaped scraper (502) away from the upper grinding disc (5) contacts the inner wall of the grinding chamber (105).