A grading grinding device for cement production

Abstract

The present invention discloses a grading grinding device for cement production, and relates to the technical field of cement production and processing devices. It includes a frame, a primary crushing assembly arranged above the inside of the frame, a secondary crushing assembly arranged in the middle, a screening assembly arranged at the bottom, and a connecting assembly for transmitting power source to the screening assembly. The present invention adds an arc-surface extrusion block and a spiral return protrusion to the secondary crushing assembly. When the cement raw material is crushed, the raw material will be driven and lifted by the spiral return protrusion under the rotation of the roller shaft. When the spiral return protrusion is farther and farther away from the adjacent arc-surface extrusion block, the raw material carried by the spiral return protrusion will slide from the spiral return protrusion to between the extrusion surface and the adjacent arc-surface extrusion block, and the raw material will be crushed under the continuous rotation of the spiral return protrusion, thereby improving the fineness of the cement raw material crushing of the device.

Description

Technical Field

[0001] The invention relates to the technical field of cement production and processing equipment, in particular to a grading grinding device for cement production. Background Art

[0002] During cement production, the cement raw materials need to be graded and ground, so a graded grinding device for cement production is needed.

[0003] For example, the patent publication number CN112588417A is a rotary multi-stage grinding device for cement production. Through the cooperation of a receiving plate, a rotating shell and teeth, the cement raw materials that have been initially ground can be re-grinded, so that the cement raw materials can be ground more finely, which is convenient for the later use of the cement raw materials.

[0004] However, during the actual use of the above-mentioned grading grinding device for cement production, when the cement raw materials fall between the receiving plate and the rotating shell of the device, due to the certain weight of the cement raw materials themselves, when the raw materials are crushed, some of the raw materials may not be well crushed during the falling process, resulting in differences in the size of the crushed cement raw materials, thereby reducing the quality of cement production. For this reason, the applicant proposes a grading grinding device for cement production. Summary of the invention

[0005] The object of the present invention is to provide a classification grinding device for cement production to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grading grinding device for cement production, comprising a frame and a primary crushing assembly arranged above the inside of the frame, a secondary crushing assembly arranged in the middle, and a screening assembly arranged at the bottom, wherein the secondary crushing assembly comprises two oppositely arranged arc-surface extrusion blocks, and a roller shaft arranged between the two oppositely arranged arc-surface extrusion blocks, the roller shaft is installed inside the frame, one of the arc-surface extrusion blocks of the two oppositely arranged arc-surface extrusion blocks is provided with an auxiliary roller, a secondary crushing tooth is fixed on one side of the outer wall of the roller shaft, a spiral material return protrusion is fixed on the other side of the outer wall of the roller shaft, and the outer wall of the spiral material return protrusion is provided with a plurality of A grading groove, a plurality of extrusion surfaces are arranged on the outer wall of the spiral material return protrusion, each of the extrusion surfaces is respectively located between adjacent grading grooves, the spiral material return protrusion, the grading groove and the extrusion surface are all spiral-shaped, one end of the longitudinal section of the spiral material return protrusion is smaller than the other end, the centers of the arc surfaces of the two opposite arc surface extrusion blocks are on the same horizontal line, and the radii of the two arc surfaces are equal, the distance from the center point of the arc surface of the two arc surface extrusion blocks to the intersection point of the two arc surfaces is greater than the distance from the center point of the two arc surfaces to the lower intersection point of the two arc surfaces, and the bottom ends of the two arc surfaces are adapted to the screening component, and the extrusion surface is in contact with the bottom ends of the arc surfaces of the two opposite arc surface extrusion blocks.

[0007] Furthermore, guide blocks are respectively fixed on the tops of the two opposite arc-surface extrusion blocks, and the two opposite guide blocks are funnel-shaped.

[0008] Furthermore, the screening component includes a first spring seat, the top of the first spring seat is fixed to the bottom of the frame, a first hose is fixed to the outer wall of the top of the first spring seat, the top of the first hose is fixed to the bottom of the outer wall of the frame, the springs at both ends of the first spring seat are respectively fixed to first contact frames, one end of the first contact frame passes through one side of the inner wall of the first hose and is connected to the connecting component, and the tops of the opposite first contact frames are jointly fixed with an arc-shaped steel frame, the two sides of the outer wall of the arc-shaped steel frame are respectively connected to adjacent arc-shaped extrusion blocks by first rubber connecting pads, and the curvature of the arc-shaped steel frame is adapted to the curvature of the arc-shaped extrusion blocks, the inner wall of the arc-shaped steel frame is fixed with a first screening net, the tops of both ends of the arc-shaped steel frame are respectively fixed with first sealing plates, and the back faces of the opposite first sealing plates are respectively slidably connected to the two sides of the inner wall of the frame.

[0009] Furthermore, a first connection box is arranged on the outer wall of the bottom end of the first spring seat, the bottom of the inner wall of the first connection box is funnel-shaped, and an opening is provided at the bottom of the inner wall of the first connection box, and a discharge pipe is fixed at the opening of the first connection box.

[0010] Furthermore, the screening assembly includes a second spring seat, the top of the second spring seat is fixed to the bottom of the outer wall of the frame, a second hose is fixed to the outer wall of the top of the second spring seat, the top of the second hose is fixed to the bottom of the frame, the springs at both ends of the second spring seat are respectively fixed with second contact frames, one end of the second contact frame passes through one side of the inner wall of the second hose and is connected to the connecting assembly, an arc-shaped steel plate is commonly fixed on the top of the two second contact frames, both sides of the outer wall of the arc-shaped steel plate are respectively connected to adjacent arc-shaped extrusion blocks by second rubber connecting pads, a number of second screening nets are equidistantly installed on the top of the arc-shaped steel plate, second sealing plates are fixed to the tops of both ends of the arc-shaped steel plate, and the back faces of the opposite second sealing plates are respectively slidably connected to both sides of the inner wall of the frame.

[0011] Furthermore, a second connecting box is provided on the outer wall of the bottom end of the second spring seat, the bottom of the inner wall of the second connecting box is funnel-shaped, and an opening is provided at the bottom of the inner wall of the second connecting box, a plurality of branch pipes are fixed at the opening of the second connecting box, a suction pipe is fixed on one side of the discharge end of the plurality of branch pipes, a filter is fixed on the inner wall of the suction pipe, and a fan is fixed on the air inlet end of the suction pipe.

[0012] Furthermore, a connecting assembly is arranged between the secondary crushing assembly and the screening assembly, and the connecting assembly includes two relatively arranged control shafts, and the relatively ends of the two relatively control shafts respectively penetrate the two sides of the outer wall of the frame and are fixed to the two ends of the adjacent roller shafts, and the opposite ends of the two relatively control shafts are rotatably connected with moving rods respectively, and the rotating connection between the control shaft and the moving rod is not at the center of the control shaft, and a soft pad is fixed at the bottom of the moving rod, and the two soft pads are respectively connected to the top of the two ends of the screening assembly, and a limit frame is arranged on the outer wall of the frame, and the top of the moving rod is located inside the limit frame.

[0013] Furthermore, a fixing frame is provided on the outer wall of the frame, a driving motor is fixed to one side of the inner wall of the fixing frame, and an output end of the driving motor is fixed to one end of one of the control shafts.

[0014] Furthermore, the primary crushing assembly includes a feed hopper, a discharge end of the feed hopper is fixed to the top of the frame, and primary crushing rollers are rotatably connected to both sides of the top of the inner wall of the frame.

[0015] Furthermore, the crushing teeth of the primary crushing roller are larger than the crushing teeth of the secondary crushing teeth, and the density is smaller than the crushing teeth of the secondary crushing teeth.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The grading grinding device for cement production has a secondary crushing component, in which an arc-surface extrusion block and a spiral return protrusion are added. When the cement raw material is crushed, the raw material will be driven and lifted by the spiral return protrusion under the rotation of the roller. When the spiral return protrusion is farther and farther away from the adjacent arc-surface extrusion block, the raw material carried by the spiral return protrusion will slide from the spiral return protrusion to between the extrusion surface and the adjacent arc-surface extrusion block, and the raw material will be crushed under the continuous rotation of the spiral return protrusion, thereby improving the fineness of the cement raw material crushing of the device.

[0018] At the same time, secondary crushing teeth and auxiliary rollers are also installed in the secondary crushing assembly. When crushing the cement raw materials, the crushing teeth of the secondary crushing teeth are smaller than those of the primary crushing rollers and have a higher density. Therefore, after the raw materials are crushed by the primary crushing assembly, they can be crushed again under the action of the secondary crushing teeth and auxiliary rollers, thereby improving the quality of cement production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional structural schematic diagram of the first embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the top cross-sectional structure of the first embodiment of the present invention;

[0021] Figure 3It is a schematic diagram of the bottom cross-sectional structure of the first embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a primary crushing assembly according to the first embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of disassembling the secondary crushing assembly of the first embodiment of the present invention;

[0024] Figure 6 for Figure 5 A partial enlarged view of part A;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the secondary crushing assembly of the first embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the cross-sectional dimensions of the secondary crushing assembly of the first embodiment of the present invention;

[0027] Fig. 9 This is a schematic diagram of disassembling the screening component of the first embodiment of the present invention;

[0028] Fig.10 This is a schematic diagram of the disassembly of the connection assembly connecting the secondary crushing assembly and the screening assembly in the first embodiment;

[0029] Fig.11 for Fig. 9 A schematic diagram of the cross-sectional structure of the rotating connection of the middle control shaft;

[0030] Fig.12 It is a cross-sectional structural schematic diagram of the second embodiment of the present invention;

[0031] Fig.13 This is a schematic diagram of the disassembly of the screening component of the second embodiment of the present invention.

[0032] In the figure: 1, frame; 2, primary crushing assembly; 201, feed hopper; 202, primary crushing roller; 3, secondary crushing assembly; 301, roller shaft; 302, arc surface extrusion block; 303, auxiliary roller; 304, secondary crushing teeth; 305, spiral return material protrusion; 305-1, grading groove; 305-2, extrusion surface; 306, guide block; 4, screening assembly; 4101, first hose; 4201, second hose; 4102, first spring seat; 4202, second spring seat; 4103, first contact frame; 4203, second contact frame; 4104, arc steel frame; 4 204, curved steel plate; 4105, first rubber connecting pad; 4205, second rubber connecting pad; 4106, first screening net; 4206, second screening net; 4107, first sealing plate; 4207, second sealing plate; 4108, first connecting box; 4208, second connecting box; 4109, discharge pipe; 4209, multi-branch pipe; 4210, suction pipe; 4211, filter net; 4212, fan; 5, connecting assembly; 501, control shaft; 502, motion rod; 503, cushion; 504, limit frame; 505, fixing frame; 506, drive motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] With the continuous development of society, cement has become a necessary material required for most construction industries. When producing cement, it is necessary to grind the raw materials of cement. Therefore, a graded grinding device for cement production is needed. In the actual use of most traditional graded grinding devices for cement production, the device does not grind the cement raw materials thoroughly enough, resulting in some raw material fragments that are not well ground inside the cement raw materials after the grinding. Workers are required to repeatedly put the unground raw materials into the device again for repeated grinding, which reduces the grinding rate of the cement raw materials by the device and also reduces the quality of cement production. For this reason, the applicant proposes a graded grinding device for cement production.

[0035] Implementation Method 1

[0036] like Figure 1-Figure 11As shown, the present invention provides a technical solution: a grading grinding device for cement production, comprising a frame 1 and four primary crushing components 2 arranged above the inside of the frame 1, two groups of secondary crushing components 3 arranged in the middle, two groups of screening components 4 arranged at the bottom, and two groups of connecting components 5 that transmit power sources to the two groups of screening components 4. In order to adapt to different usage scenarios, the number of the primary crushing components 2, the secondary crushing components 3, the screening components 4 and the connecting components 5 in this embodiment can be changed. In this embodiment, the primary crushing component 2 can adopt a roller crushing mechanical structure to realize the crushing of the original The material is initially crushed, which is the principle of an industrial roller crusher. The principle of the roller crusher is a mature existing technology and will not be elaborated here. In this embodiment, as an alternative, in order to adapt to this embodiment, a primary crushing component 2 is designed. The primary crushing component 2 is composed of a feed hopper 201 and a primary crushing roller 202. When the raw material is poured from the feed hopper 201, it will be crushed by the primary crushing roller 202. The crushed raw material enters the secondary crushing component 3 for finer grinding. After grinding, the raw material will be screened and discharged by the screening component 4 under the action of the connecting component 5.

[0037] The secondary crushing assembly 3 can achieve a more fine grinding effect on the raw material, and its structure includes: two arc-surface extrusion blocks 302 arranged opposite to each other, and a roller shaft 301 arranged between the two arc-surface extrusion blocks 302 arranged opposite to each other, wherein the roller shaft 301 and the arc-surface extrusion block 302 are both installed inside the frame 1, wherein a secondary crushing tooth 304 is fixed to one side of the outer wall of the roller shaft 301, a spiral material return protrusion 305 is fixed to the other side of the outer wall of the roller shaft 301, and a grading groove 305-1 and an extrusion surface 305-2 are provided on the outer wall of the spiral material return protrusion 305, a guide block 306 is fixed to the top of the arc-surface extrusion block 302, and an auxiliary roller 303 is provided on the arc surface of the arc-surface extrusion block 302, such as Figure 5-Figure 8 As shown, since the adjacent guide blocks 306 are funnel-shaped, after the raw materials are crushed by the primary crushing component 2, the raw materials will slide into the secondary crushing component 3 under the action of the guide blocks 306. Since the arc surface of the arc extrusion block 302 on one side of the roller shaft 301 is connected to the auxiliary roller 303 by arc surface rotation, and the secondary crushing teeth 304 are fixed on one side of the outer wall of the roller shaft 301, since the crushing teeth of the secondary crushing teeth 304 are smaller than the crushing teeth of the primary crushing roller 202 and have a higher density, the raw materials can be crushed again under the action of the secondary crushing teeth 304 and the auxiliary roller 303 after being crushed by the primary crushing component 2. The crushed raw materials will follow the secondary crushing teeth 304 to slide from the arc surface extrusion block 302 to the screening component 4, and the raw materials that meet the size will be discharged from the screening component 4. The spiral material return protrusion 305 is fixed on the other side of the outer wall of the roller shaft 301, and the spiral material return protrusion 305 itself is spiral, as shown in FIG. Figure 7As shown, one end of the longitudinal section of the spiral material return protrusion 305 is smaller than the other end, and the spiral material return protrusion 305 is provided with an extrusion surface 305-2 and a grading groove 305-1, and the grading groove 305-1 and the extrusion surface 305-2 are also spiral. Figure 8 As shown, the arc-shaped extrusion blocks 302 on both sides of the roller shaft 301 have their arc-shaped centers on the same horizontal line, and the radii of the two arc-shaped surfaces are equal (i.e. Figure 8 , R1=R2), and the distance from the center point of the two arcs to the intersection point of the two arcs is greater than the distance from the center point of the two arcs to the lower intersection point of the two arcs (i.e. Figure 8 , M1>M2), and the lower ends of the two arc surfaces are adapted to the screening component 4, and at the same time, the extrusion surface 305-2 contacts the arc bottom end of the adjacent arc surface extrusion block 302. At this time, the raw material will be driven by the spiral material return protrusion 305 under the rotation of the roller shaft 301 and lifted. When the spiral material return protrusion 305 is farther and farther away from the adjacent arc surface extrusion block 302, the raw material carried by the spiral material return protrusion 305 will slide from the spiral material return protrusion 305 to the extrusion surface 305-2 and the adjacent arc surface extrusion block 302. The raw materials are crushed by the continuous rotation of the spiral material return protrusion 305. At this time, the crushed raw materials will fall into the classification groove 305-1. As the spiral material return protrusion 305 rotates, the raw materials in the classification groove 305-1 will slide along the thread of the classification groove 305-1. In the process of sliding, since the extrusion surface 305-2 is spirally arranged, when the extrusion surface 305-2 rotates, one end of the extrusion surface 305-2 will be moved to the adjacent The distance between the arc surface extrusion block 302 is greater than the distance from the other end to the adjacent arc surface extrusion block 302, so the raw material will be crushed more finely again to improve the accuracy of raw material crushing. At the same time, the raw material on the spiral return material protrusion 305 will slide along the thread of the spiral return material protrusion 305 as the spiral return material protrusion 305 continues to rotate, thereby increasing the amount of raw material grinding. The crushed raw material will slide along the arc surface extrusion block 302 to the screening component 4, and under the action of the connecting component 5, the raw material that meets the size will be discharged from the screening component 4. When there is too much raw material inside the secondary crushing component 3 and it cannot be crushed at one time, part of the uncrushed raw material will pass through the gap between the spiral return material protrusion 305 and the adjacent arc surface extrusion block 302, and slide along the arc surface extrusion block 302 to the screening component 4, and the other part of the raw material will follow the movement of the spiral return material protrusion 305 and be driven to be crushed in a cycle until the raw material is discharged from the screening component 4, thereby completing the grinding operation of the raw material.

[0038] In order to achieve the purpose of screening the ground raw materials, a screening component 4 is designed, and its structure includes: a first spring seat 4102 and a first connecting box 4108 installed on the outer wall of the lower end of the first spring seat 4102, the first spring seat 4102 is installed at the bottom of the frame 1, wherein a first hose 4101 is fixed to the top outer wall of the first spring seat 4102, the top of the first hose 4101 is installed at the bottom of the frame 1, and the springs at both ends of the first spring seat 4102 are respectively fixed with first contact frames 4103, one end of the first contact frame 4103 penetrates one side of the inner wall of the first hose 4101 and is connected to the connecting component 5, and the two The top of each first contact frame 4103 is commonly fixed with an arc-shaped steel frame 4104, and the two sides of the arc-shaped steel frame 4104 are respectively connected to the two opposite arc-shaped extrusion blocks 302 by first rubber connection pads 4105, and the tops of both ends of the arc-shaped steel frame 4104 are respectively fixed with first sealing plates 4107, and one side of the first sealing plate 4107 is slidably connected to one side of the inner wall of the frame 1, and the inner wall of the arc-shaped steel frame 4104 is fixed with a first screening net 4106, and the bottom of the inner wall of the first connection box 4108 is funnel-shaped, and the bottom of the inner wall of the first connection box 4108 is provided with an opening, and a discharge pipe 4109 is fixed at the opening of the first connection box 4108, such as Fig. 9 As shown, the curvature of the arc steel frame 4104 is adapted to the curvature of the arc surface of the adjacent arc surface extrusion block 302. When the raw material is pushed by the spiral return material protrusion 305, the outer wall of the spiral return material protrusion 305 will contact the concave surface of the arc steel frame 4104. Therefore, the raw material that meets the size will fall from the first screening net 4106 installed on the inner wall of the arc steel frame 4104. At the same time, the two ends of the roller 301 are connected to the connecting component 5. Therefore, under the rotation of the roller 301, the connecting component 5 will move. Because the first contact frames 4103 are respectively installed at the bottom of the two ends of the arc steel frame 4104, and the first contact frames 4103 are connected to the connecting component 5, the arc steel frame 4104 will vibrate with a small arc under the action of the connecting component 5, and then the raw material that meets the size will fall from the first screening net 4106, which can effectively prevent the first screening net 4106 from being blocked, and the ground raw material will be discharged from the inside of the device through the discharge pipe 4109.

[0039] In order to achieve the purpose of stable operation of the screening component 4 and prevent the raw material from clogging the screening component 4, the screening component 4 can be vibrated by an external power source, that is, the principle of an industrial vibrating screen. The principle of the vibrating screen is a mature existing technology and will not be described in detail here. In this embodiment, as an alternative, a connecting component 5 is designed, whose structure includes: two relatively arranged control shafts 501, the opposite ends of the two relatively arranged control shafts 501 respectively penetrate the two sides of the outer wall of the frame 1 and are fixed to the two ends of the roller shaft 301, one end of the control shaft 501 is rotatably connected to a moving rod 502, a limited position frame 504 is provided on the outer wall of the frame 1, the top of the moving rod 502 is located inside the limited position frame 504, a soft pad 503 is fixed to the bottom of the moving rod 502, and the two soft pads 503 are respectively connected to the two ends of the first contact frame 4103, a fixed frame 505 is provided on the outer wall of the frame 1, and a driving motor 506 is fixed on one side of the inner wall of the fixed frame 505, and the output end of the driving motor 506 is fixed to the other end of one of the control shafts 501, such as Figure 10-11 As shown in FIG. 1 , the axes of adjacent control shafts 501 are respectively fixed to the two ends of adjacent roller shafts 301. Therefore, when one of the control shafts 501 rotates, the roller shaft 301 and the other control shaft 501 can move. Therefore, when the raw material is crushed by the secondary crushing assembly 3, the control shaft 501 will drive the motion rod 502 connected to it to move. Because the motion rod 502 is restricted by the limit frame 504 during the movement, Fig.10 As shown, the rotation connection between the control shaft 501 and the moving rod 502 is not at the center of the control shaft 501, so the control shaft 501 will move up and down. At this time, the soft pad 503 fixed at the bottom of the moving rod 502 will continuously drive the first contact frame 4103 to move, causing the arc-shaped steel frame 4104 to vibrate in a small arc, preventing the raw materials from being stuck or blocked on the first screening net 4106.

[0040] Implementation Method 2

[0041] In this embodiment, in order to achieve the purpose of screening the ground raw materials, a second screening component 4 is designed, and its structure includes a second spring seat 4202 and a second connecting box 4208 installed on the outer wall of the bottom end of the second spring seat 4202, and the second spring seat 4202 is installed at the bottom of the frame 1, wherein a second hose 4201 is fixed to the outer wall of the top end of the second spring seat 4202, and the top end of the second hose 4201 is installed at the bottom of the frame 1, and the springs at both ends of the second spring seat 4202 are respectively fixed with second contact frames 4203, and one end of the second contact frame 4203 passes through one side of the inner wall of the second hose 4201 and is connected to the connecting component 5, and the top ends of the two second contact frames 4203 are commonly fixed with an arc-shaped steel plate 4204, and the arc-shaped steel plate 4 The two sides of 204 are connected to the two opposite arc-surface extrusion blocks 302 by second rubber connection pads 4205 respectively, and second sealing plates 4207 are fixed to the tops of both ends of the arc-shaped steel plate 4204 respectively. One side of the second sealing plate 4207 is slidably connected to one side of the inner wall of the frame 1, and a plurality of second screening nets 4206 are equidistantly installed on the top of the arc-shaped steel plate 4204. The bottom of the inner wall of the second connection box 4208 is funnel-shaped, and an opening is provided at the bottom of the inner wall of the second connection box 4208. A multi-branch pipe 4209 is fixed at the opening of the second connection box 4208, and a suction pipe 4210 is fixed to one side of the discharge end of the multi-branch pipe 4209. A filter net 4211 is fixed to the inner wall of the suction pipe 4210, and a fan 4212 is fixed to the air inlet end of the suction pipe 4210. Figure 12-13 As shown, different from the first embodiment, in this example, the arc-shaped steel frame 4104 and the first screening net 4106 of the screening component 4 in the first embodiment are replaced with an arc-shaped steel plate 4204, and a plurality of second screening nets 4206 are equidistantly installed on the concave surface of the arc-shaped steel plate 4204, so that when the spiral return protrusion 305 of the device contacts the arc-shaped steel plate 4204, the hardness of the filtering mechanism of the device is increased, and the stability of the device is improved, and the first discharge pipe 4109 of the screening component 4 in the first embodiment is replaced with a multi-branch pipe 4209, and a suction pipe 4210 is fixed on one side of the discharge end of the multi-branch pipe 4209, a filter net 4211 is fixed on the inner wall of the suction pipe 4210, and a fan 4212 is fixed on the air inlet end of the suction pipe 4210, and the fan 4212 can be used to assist in sucking the raw materials out of the inside of the device. Compared with the first embodiment, the device can be further prevented from being blocked.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A grading grinding device for cement production, comprising a frame (1), a primary crushing assembly (2) arranged at the upper part of the frame (1), a secondary crushing assembly (3) arranged in the middle, and a screening assembly (4) arranged at the bottom, characterized in that: The secondary crushing assembly (3) comprises two cambered extrusion blocks (302) arranged opposite to each other, and a roller shaft (301) arranged between the two cambered extrusion blocks (302) arranged opposite to each other, the roller shaft (301) being installed inside the frame (1), one of the cambered surfaces of the two cambered extrusion blocks (302) being provided with an auxiliary roller (303), a secondary crushing tooth (304) being fixed on one side of the outer wall of the roller shaft (301), a spiral material return protrusion (305) being fixed on the other side of the outer wall of the roller shaft (301), a plurality of grading grooves (305-1) being provided on the outer wall of the spiral material return protrusion (305), a plurality of extrusion surfaces (305-2) being provided on the outer wall of the spiral material return protrusion (305), each extrusion surface (305 -2) are respectively located between adjacent grading grooves (305-1), the spiral material return protrusion (305) and the grading groove (305-1) and the extrusion surface (305-2) are all spiral-shaped, one end of the longitudinal section of the spiral material return protrusion (305) is smaller than the other end, the arc centers of the two opposite arc surface extrusion blocks (302) are located on the same horizontal line, and the radii of the two arc surfaces are equal, the distance from the arc center point of the two arc surface extrusion blocks (302) to the middle intersection of the two arc surfaces is greater than the distance from the arc center point of the two arc surfaces to the lower intersection of the two arc surfaces, the bottom ends of the two arc surfaces are compatible with the screening component (4), and the extrusion surface (305-2) is in contact with the arc bottom ends of the two opposite arc surface extrusion blocks (302).

2. The grading grinding device for cement production according to claim 1, characterized in that: A material guide block (306) is respectively fixed on the top of two opposite curved surface extrusion blocks (302), and the two opposite material guide blocks (306) are funnel-shaped.

3. The grading grinding device for cement production according to claim 1, characterized in that: The screening component (4) comprises a first spring seat (4102), the top of the first spring seat (4102) being fixed to the bottom of the frame (1), a first hose (4101) being fixed to the outer wall of the top of the first spring seat (4102), the top of the first hose (4101) being fixed to the bottom of the outer wall of the frame (1), springs at both ends of the first spring seat (4102) being respectively fixed to first contact frames (4103), one end of the first contact frame (4103) passing through one side of the inner wall of the first hose (4101) and then connected to the connecting component (5), the top of the first contact frame (4103) being opposite to the top of the first contact frame (4103) The arc-shaped steel frame (4104) is fixed to the two parts together, and the two sides of the outer wall of the arc-shaped steel frame (4104) are connected to the adjacent arc-surface extrusion blocks (302) by first rubber connection pads (4105), and the curvature of the arc-shaped steel frame (4104) is adapted to the curvature of the curved surface of the adjacent arc-surface extrusion blocks (302). The first screening net (4106) is fixed to the inner wall of the arc-shaped steel frame (4104), and the tops of the two ends of the arc-shaped steel frame (4104) are respectively fixed with first sealing plates (4107), and the opposite back surfaces of the first sealing plates (4107) are respectively slidably connected to the two sides of the inner wall of the frame (1).

4. The grading grinding device for cement production according to claim 3 is characterized in that: A first connecting box (4108) is provided on the outer wall at the bottom end of the first spring seat (4102), the bottom of the inner wall of the first connecting box (4108) is funnel-shaped, and an opening is provided at the bottom of the inner wall of the first connecting box (4108), and a discharge pipe (4109) is fixed at the opening of the first connecting box (4108).

5. The classification grinding device for cement production according to claim 1, characterized in that: The screening component (4) comprises a second spring seat (4202), the top of the second spring seat (4202) being fixed to the bottom of the outer wall of the frame (1), a second hose (4201) being fixed to the outer wall of the top of the second spring seat (4202), the top of the second hose (4201) being fixed to the bottom of the frame (1), springs at both ends of the second spring seat (4202) being respectively fixed to second contact frames (4203), one end of the second contact frame (4203) passing through one side of the inner wall of the second hose (4201) and then connected to the connecting component (5). A curved steel plate (4204) is fixed to the top of the two second contact frames (4203), and the outer walls of the curved steel plates (4204) are connected to adjacent curved surface extrusion blocks (302) by second rubber connection pads (4205) on both sides. A plurality of second screening nets (4206) are installed at equal intervals on the top of the curved steel plates (4204), and second sealing plates (4207) are fixed to the tops of both ends of the curved steel plates (4204). The opposite back surfaces of the second sealing plates (4207) are slidably connected to the inner walls of the frame (1) on both sides.

6. A graded grinding device for cement production according to claim 5, characterized in that: A second connection box (4208) is provided on the outer wall of the bottom end of the second spring seat (4202); the bottom of the inner wall of the second connection box (4208) is funnel-shaped, and an opening is provided at the bottom of the inner wall of the second connection box (4208); a multi-branch tube (4209) is fixed at the opening of the second connection box (4208); a suction pipe (4210) is fixed on one side of the discharge end of the multi-branch tube (4209); a filter screen (4211) is fixed on the inner wall of the suction pipe (4210); and a fan (4212) is fixed at the air inlet end of the suction pipe (4210).

7. The classification grinding device for cement production according to claim 1, characterized in that: A connecting assembly (5) is provided between the secondary crushing assembly (3) and the screening assembly (4), the connecting assembly (5) comprising two control shafts (501) arranged opposite to each other, the opposite ends of the two control shafts (501) respectively passing through the two sides of the outer wall of the frame (1) and then being fixed to the two ends of the adjacent roller shafts (301), the opposite ends of the two control shafts (501) are rotatably connected to movement rods (502), the rotation connection between the control shafts (501) and the movement rods (502) is not located at the center of the circle of the control shafts (501), a soft pad (503) is fixed to the bottom of the movement rod (502), the two soft pads (503) are respectively connected to the top of the two ends of the screening assembly (4), a limit frame (504) is provided on the outer wall of the frame (1), and the top of the movement rod (502) is located inside the limit frame (504).

8. The classification grinding device for cement production according to claim 7, characterized in that: The outer wall of the frame (1) is provided with a fixing frame (505), and a driving motor (506) is fixed to one side of the inner wall of the fixing frame (505), and the output end of the driving motor (506) is fixed to one end of one of the control shafts (501).

9. The classification grinding device for cement production according to claim 1, characterized in that: The primary crushing assembly (2) comprises a feed hopper (201), a discharge end of the feed hopper (201) being fixed to the top of the frame (1), and primary crushing rollers (202) are rotatably connected to both sides of the top of the inner wall of the frame (1).

10. A grading grinding device for cement production according to claim 9, characterized in that: The crushing teeth of the primary crushing roller (202) are larger than the crushing teeth of the secondary crushing teeth (304), and the density is smaller than the crushing teeth of the secondary crushing teeth (304).

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