A graded grinding device for cement grinding aid

Abstract

The present invention relates to the technical field of cement grinding aid production equipment, and specifically to a graded grinding device for cement grinding aid. It is aimed at the problem that the grinding steel balls in the existing ball mill are subjected to a large impact force when falling downward, resulting in serious wear of the grinding steel balls. It includes a fixed frame, the fixed frame is fixedly connected to a fixed shell, the fixed frame and the fixed shell are jointly rotatably connected to a feed pipe, the feed pipe is fixedly connected in the fixed shell and connected to a first rotating shell, the grinding steel balls are placed in the first rotating shell, the first rotating shell is fixedly connected to a fixed block, the fixed blocks in the same group are jointly slidably connected to a sliding block, and the sliding block is slidably connected to a sliding baffle. The present invention increases the contact area of ​​the grinding steel balls when colliding with the sliding block and the sliding baffle by making the sliding block and the sliding baffle slide, so as to reduce the impact force on the grinding steel balls, thereby reducing the degree of wear of the grinding steel balls and improving the service life of the grinding steel balls.

Description

Technical Field

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

[0002] Cement grinding aid is a special auxiliary material, which mainly includes silicate, alumina, magnesium oxide, etc. When producing cement grinding aid, it is usually necessary to mix the raw materials according to the ratio first, and then put the mixed materials into the ball mill for grinding to ensure the uniform quality of the cement grinding aid and facilitate subsequent use. When the ball mill is mixing the materials, it is usually necessary to set a lining plate with a protrusion in the ball mill to facilitate the ball mill to drive the grinding steel balls and the materials to rotate together, so that the grinding steel balls are continuously rotated under the action of centrifugal force and gravity. It rises upward and makes a parabolic motion downward to impact and grind the material, but the existing liner and the protrusion on the liner are fixed structures, which causes the grinding steel ball to fall directly onto the protrusion of the liner when it falls downward along the parabola, and the edge corners of the protrusion of the liner are mostly sharp angles close to 90°. When the grinding steel ball collides with the sharp angle, there is a large pressure at the contact point between the liner and the grinding steel ball, and both the liner and the grinding steel ball are subjected to a large impact force, resulting in severe wear of the grinding steel balls in the existing ball mill and a short service life. Summary of the invention

[0003] In order to overcome the disadvantage that the grinding steel balls in the existing ball mill are subjected to a large impact force when falling downward, resulting in serious wear of the grinding steel balls, the purpose of the present invention is to provide a graded grinding device for cement grinding aids.

[0004] The technical solution is: a graded grinding device for cement grinding aids, comprising a fixed frame, a fixed shell is fixedly connected to the upper side of the fixed frame, the fixed frame and the fixed shell are connected to a feed pipe for rotation together, a torque motor is fixedly connected to the side of the fixed frame close to the feed pipe, the output shaft of the torque motor and the feed pipe are driven by a gear set, the feed pipe is fixedly connected in the fixed shell and communicated with a first rotating shell, a plurality of grinding steel balls are placed in the first rotating shell, the first rotating shell is provided with a plurality of evenly distributed groups of ventilation holes and sliding holes, each group includes a plurality of ventilation holes and sliding holes in a circumferential array, the first rotating shell is fixedly connected to a plurality of The fixed blocks are grouped and correspond to the vent holes one by one, each group includes the fixed blocks evenly distributed, the fixed blocks in the same group are slidably connected with a sliding block, a first elastic member is installed between the sliding block and the adjacent fixed block, the sliding block is slidably connected with a sliding baffle, and a second elastic member is installed between the two, a plurality of sealing blocks are fixedly connected in the first rotating shell and respectively cooperate with the adjacent sliding blocks for sliding sealing, a ventilation mechanism for guiding the flow of materials is arranged between the first rotating shell and the fixed shell, and a secondary grinding mechanism for further grinding the materials in the first rotating shell is arranged on the side of the fixed frame away from the fixed shell.

[0005] Preferably, the sliding block is slidably connected to an auxiliary extrusion plate, and a third elastic member is installed between the two, and the auxiliary extrusion plate is slidably connected to the sliding hole.

[0006] Preferably, the ventilation mechanism includes circumferentially distributed dividing strips, the circumferentially distributed dividing strips are all fixed in the fixed shell, the dividing strips are rotatably connected to the first rotating shell, the dividing strips divide the space between the first rotating shell and the fixed shell into three cavities, namely, a first cavity, a second cavity and a third cavity, wherein the second cavity is located on the upper side and the third cavity is located on the lower side, the fixed shell is provided with a buffer component near the third cavity for buffering the adjacent sliding baffles, and the fixed shell is provided with a screening component near the first cavity for collecting materials finished from primary grinding.

[0007] Preferably, the buffer assembly includes an elastic airbag, which is fixed to the fixing frame near the third cavity, and a plurality of evenly distributed connecting plates are fixed to one side of the elastic airbag near the first rotating shell, and the connecting plates are extruded and matched with the adjacent sliding baffles and the adjacent auxiliary extrusion plates, wherein evenly distributed wedge blocks are fixed to the connecting plate near the first cavity, and the wedge blocks are extruded and matched with the adjacent sliding baffles.

[0008] Preferably, the screening material assembly includes uniformly distributed first extrusion plates, the number of the first extrusion plates is the same as the number of groups of the vents, the first extrusion plates are fixed to the fixed shell near the first cavity, the first extrusion plates are extruded and matched with the adjacent sliding baffle, a screening cavity is provided in the sliding baffle, a symmetrically distributed first filter screen is fixed to one side of the sliding baffle near the axis of the first rotating shell, the screening cavity is connected to the space inside the first rotating shell through the first filter screen, a square sealing shell is fixed to one side of the sliding block near the vents, the square sealing shell slides and seals with the adjacent vents, and the sliding baffle is located in the adjacent square sealing shell.

[0009] Preferably, the secondary grinding mechanism includes a feeding shell, the feeding shell is fixedly connected to a side of the fixed shell away from the feeding pipe, the fixed frame is fixedly connected to a discharge shell on a side away from the fixed shell, the discharge shell is fixedly connected to the feeding shell, a second rotating shell is rotatably connected in the discharge shell, the second rotating shell is provided with filter holes that are evenly distributed and connected to adjacent spaces in the discharge shell, the feeding shell is fixedly connected and connected to a discharge pipe, the feeding shell is fixedly connected to a fixed plate through the discharge pipe, the discharge pipe is connected to the second rotating shell, a metering device is provided in the discharge pipe, the fixed plate is rotatably connected to the second rotating shell, a plurality of grinding steel balls with a diameter smaller than that of the grinding steel balls in the first rotating shell are placed in the second rotating shell, a middle grinding assembly for pre-grinding the material in the second rotating shell is provided between the first rotating shell and the feeding shell, and a driving connection assembly for driving the second rotating shell to rotate is provided on the side of the feeding shell close to the discharge shell.

[0010] Preferably, the middle grinding assembly includes a semi-conical shell, the semi-conical shell is rotatably connected to the side of the first rotating shell close to the feeding shell, the semi-conical shell is fixed to the circumferentially distributed dividing strips, the side of the first rotating shell close to the feeding shell is fixed with an extrusion block, the side of the extrusion block close to the feeding shell is fixed with evenly distributed grinding hemispheres, the side of the feeding shell close to the first rotating shell is fixed with evenly distributed grinding hemispheres, and the space between the feeding shell and the extrusion block is connected to the first cavity.

[0011] Preferably, the drive connection assembly includes a rotating shaft, the rotating shaft is fixedly connected to a side of the extrusion block close to the feeding shell, there is a gap between the rotating shaft and the feeding shell, the feeding shell is rotatably connected to a connecting shell, the connecting shell and the second rotating shell are transmitted by a gear set, the connecting shell is rotatably connected to the fixed plate, the connecting shell is rotatably connected to a sealing circular plate, the connecting shell is splined with a sliding ring, the sliding ring is rotatably connected to a fixing ring on a side close to the sealing circular plate, the feeding shell is fixedly connected to an electric push rod, the telescopic end of the electric push rod is slidably connected to the fixing ring, and a fourth elastic member is installed therebetween, the fixing ring is slidably connected to the sealing circular plate, semi-arc blocks uniformly distributed circumferentially are fixedly connected in the sliding ring, the rotating shaft is fixedly connected to convex blocks uniformly distributed circumferentially and respectively extruded and matched with adjacent semi-arc blocks, and a buffer component is provided in the semi-arc block for buffering the impact of the convex blocks on the rotating shaft.

[0012] Preferably, the buffer component comprises a buffer plate, and the buffer plate is slidably connected to the adjacent semi-arc block through a support rod, and a fifth elastic member is installed between the two.

[0013] Preferably, it also includes an auxiliary grinding mechanism for auxiliary grinding of small pieces of material, the auxiliary grinding mechanism is arranged in the sliding baffle, the auxiliary grinding mechanism includes a plurality of groups of second filter screens, each group includes symmetrically distributed second filter screens, the filtering accuracy of the second filter screens is higher than the filtering accuracy of the first filter screen, the number of groups of the second filter screens corresponds to the sliding baffles one by one, the second filter screens are fixedly connected in adjacent sliding baffles, the sliding baffle screening cavity is connected to the adjacent square sealing shell through the adjacent second filter screens, the sliding baffle is rotatably connected to a baffle plate near the axis of the first rotating shell, a sixth elastic member is installed between the baffle plate and the sliding baffle, and the fixed shell is fixedly connected to second extrusion plates that are evenly distributed and respectively extruded and matched with adjacent sliding baffles near the second cavity.

[0014] Compared with the prior art, the present invention has at least the following advantages: the present invention increases the contact area of ​​the grinding steel ball when it collides with the sliding block and the sliding baffle by allowing the sliding block and the sliding baffle to slide, thereby reducing the impact force on the grinding steel ball, thereby reducing the degree of wear of the grinding steel ball and increasing the service life of the grinding steel ball.

[0015] The present invention uses the airflow to screen the material during the process of pushing the material and the grinding steel balls to rotate by the screening component, and then discharges the ground qualified material to the next process, thereby increasing the effective working efficiency of the grinding steel balls.

[0016] The present invention further grinds the material in the first rotating shell through a secondary grinding mechanism to achieve an automatic graded grinding effect. At the same time, the first rotating shell and the second rotating shell are linked through a driving connection component, which reduces the number of motors used and adjusts the rotation speed of the second rotating shell so that the small-sized grinding steel balls in the second rotating shell can perform fine grinding operations. The connection state of the first rotating shell and the second rotating shell can be connected and disconnected at any time, thereby improving the practicality of the device.

[0017] The present invention sprays the material close to the qualified standard of the material in the first rotating shell to the grinding steel ball through the auxiliary grinding mechanism to further grind the material, and at the same time uses the airflow to backwash the second filter screen and the first filter screen to prevent the second filter screen and the first filter screen from being blocked by the material and affecting the discharge of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the fixed shell, the feeding shell and the discharging shell of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the feed pipe, the first rotating shell and the partition bar of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the first rotating shell, the vent hole and the sliding hole of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixed block, the sliding block and the auxiliary extrusion plate of the present invention;

[0023] Figure 6 It is a cross-sectional view of the sliding block, the sliding baffle and the auxiliary extrusion plate of the present invention;

[0024] Figure 7 It is a left side view of the first cavity, the second cavity and the third cavity of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixed shell, the first rotating shell and the first extrusion plate of the present invention;

[0026] Fig. 9 This is a parts display diagram of the first extruded plate of the present invention;

[0027] Fig.10 It is a cross-sectional view of the fixed shell, the feeding shell and the second rotating shell of the present invention;

[0028] Fig.11 It is a schematic diagram of the three-dimensional structure of the feeding shell, the semi-conical shell and the extrusion block of the present invention;

[0029] Fig.12It is a cross-sectional view of the connecting shell, the sealing circular plate and the feeding shell of the present invention;

[0030] Fig.13 It is an exploded view of the electric push rod, the fourth elastic member and the semi-arc block of the present invention.

[0031] Names in the figure: 1-fixed frame, 2-fixed shell, 3-feeding pipe, 4-torque motor, 5-first rotating shell, 51-vent, 52-sliding hole, 6-fixed block, 61-first elastic member, 7-sliding block, 8-sliding baffle, 81-second elastic member, 82-first filter screen, 83-square sealing shell, 9-auxiliary extrusion plate, 91-third elastic member, 10-sealing block, 11-dividing strip, 111-first cavity, 112-second cavity, 113-third cavity, 12-elastic airbag, 121 -connecting plate, 122-wedge block, 13-first extrusion plate, 14-feeding shell, 15-discharge shell, 16-second rotating shell, 17-fixed plate, 18-semi-conical shell, 19-extrusion block, 20-rotating shaft, 21-connecting shell, 211-sealing circular plate, 22-sliding ring, 23-fixed ring, 24-electric push rod, 25-fourth elastic member, 26-semi-arc block, 27-buffer plate, 28-fifth elastic member, 29-second filter screen, 30-blocking plate, 31-sixth elastic member, 32-second extrusion plate. DETAILED DESCRIPTION

[0032] The technical solution is further described below in conjunction with a specific embodiment. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the structure shown in FIG. Figure 1 The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning.

[0033] Example 1: When the grinding steel balls in the existing ball mill fall downward along a parabola, because the protrusions of the existing liner are mostly sharp angles close to 90°, when the grinding steel balls collide with the protrusions of the liner, the pressure between the two is too large, which causes a large impact force on both the grinding steel balls and the liner, resulting in severe wear of the grinding steel balls in the existing ball mill and a short service life.

[0034] In view of the above problems, the present invention proposes a grading grinding device for cement grinding aids, please refer to Figure 1-Figure 6, including a fixed frame 1, a fixed shell 2 is fixedly connected to the left side of the upper part of the fixed frame 1, and the fixed frame 1 and the fixed shell 2 are connected to a feed pipe 3 for rotation together. The staff uses the existing device to transport materials or introduce airflow into the first rotating shell 5 through the feed pipe 3. The left side of the fixed frame 1 is fixedly connected to a torque motor 4 electrically connected to an external control terminal. The output shaft of the torque motor 4 and the feed pipe 3 are driven by a gear set. The feed pipe 3 is fixedly connected in the fixed shell 2 and communicated with the first rotating shell 5. The first rotating shell 5 is used to hold unground cement grinding aid materials (hereinafter referred to as materials). A plurality of grinding steel balls are placed in the first rotating shell 5. The grinding steel balls are existing devices, and their size and weight are the same as those of the first rotating shell 5. The diameter and rotation speed of a rotating shell 5 are in a certain ratio so that the gravity on the grinding steel ball and the centripetal force on it cooperate with each other, and the grinding steel ball is controlled to make parabolic motion to grind the material in the first rotating shell 5 by impact. The first rotating shell 5 is provided with a plurality of evenly distributed groups of vent holes 51 and sliding holes 52, each group comprising a plurality of vent holes 51 and sliding holes 52 in a circumferential array, and the vent holes 51 and the sliding holes 52 are used to make the sliding baffle 8 and the auxiliary extrusion plate 9 contact with the components on the outside of the first rotating shell 5. A plurality of groups of fixed blocks 6 are fixedly connected in the first rotating shell 5, and the number of groups of the fixed blocks 6 is equal to the number of the vent holes 51, and each group comprises three evenly distributed fixed blocks 6, and the fixed blocks 6 in the same group have a total of The sliding block 7 is slidably connected with the sliding block 7, and a first elastic member 61 is installed between the sliding block 7 and the adjacent fixed block 6. The first elastic member 61 is a spring. The sliding block 7 is slidably connected with a sliding baffle 8, and a second elastic member 81 is installed between the two. The second elastic member 81 is a spring, and the second elastic member 81 always maintains a stored force state, which is convenient for controlling the sliding baffle 8 to slide toward the outside of the first rotating shell 5. The sliding baffle 8 is located in the adjacent vent hole 51. The sliding block 7 is slidably connected with an auxiliary extrusion plate 9, and a third elastic member 91 is installed between the two. The third elastic member 91 is a tension spring. The auxiliary extrusion plate 9 is used to buffer the impact of the grinding steel ball. The auxiliary extrusion plate 9 is slidably connected to the sliding hole 52. The first rotating shell 5 is fixedly connected with a plurality of sealing blocks 10 respectively cooperating with adjacent sliding blocks 7 for sliding sealing. The sliding block 7 is located between two adjacent sealing blocks 10. The sealing block 10 is used to ensure that when the sliding block 7 slides relative to the first rotating shell 5, the material will not enter between the first rotating shell 5 and the sliding block 7. The sealing block 10 is made of flexible rubber material, which increases the sealing effect and the contact point area when the grinding steel ball contacts it. A ventilation mechanism for guiding the flow of materials is arranged between the first rotating shell 5 and the fixed shell 2. A secondary grinding mechanism for further grinding the material in the first rotating shell 5 is arranged on the side of the fixed frame 1 away from the fixed shell 2. The secondary grinding mechanism is electrically connected to the control terminal.

[0035] Please refer to Figure 7 and Figure 8The ventilation mechanism includes three circumferentially distributed dividing strips 11, which are all fixed in the fixed shell 2. The dividing strips 11 are rotatably connected to the first rotating shell 5. The dividing strips 11 divide the space between the first rotating shell 5 and the fixed shell 2 into three cavities, namely, a first cavity 111, a second cavity 112 and a third cavity 113. The first cavity 111 is located on the rear side for discharging materials, the second cavity 112 is located on the upper side, and the third cavity 113 is located on the lower side for buffering the adjacent sliding baffles 8. A buffer component for buffering the adjacent sliding baffles 8 is provided near the third cavity 113 of the fixed shell 2, and a screening component for collecting materials after primary grinding is provided near the first cavity 111 of the fixed shell 2.

[0036] Please refer to Figure 7 and Figure 8 The buffer assembly includes an elastic airbag 12 fixed to the lower part of the front side of the fixing frame 1, and the elastic airbag 12 is used to provide a buffer force to the adjacent sliding baffle 8. The elastic airbag 12 is located in the third cavity 113. A plurality of evenly distributed connecting plates 121 are fixed to one side of the elastic airbag 12 close to the first rotating shell 5. The connecting plates 121 are made of rubber material of medium hardness and are used to increase the contact area between the sliding baffle 8 and the elastic airbag 12, and provide a greater buffer force to the sliding baffle 8 while protecting the elastic airbag 12. The connecting plates 121 are squeezed and matched with the adjacent sliding baffle 8 and the adjacent auxiliary extrusion plates 9, wherein evenly distributed wedge blocks 122 are fixed to the connecting plates 121 close to the first cavity 111. The wedge blocks 122 squeeze the adjacent sliding baffle 8 to make the sliding baffle 8 slide into the first rotating shell 5 so that the sliding baffle 8 enters the first cavity 111.

[0037] Please refer to Figure 6-Figure 9The screening material assembly includes first extrusion plates 13 that are evenly distributed and fixed to the fixed shell 2. The first extrusion plates 13 are provided with evenly distributed inclined surfaces and through holes for facilitating the passage of materials driven by airflow. The number of the first extrusion plates 13 is the same as the number of groups of the vents 51. The first extrusion plates 13 are all located in the first cavity 111. The first extrusion plates 13 squeeze the adjacent sliding baffles 8 so that the sliding baffles 8 are always located in the first rotating shell 5. A screening cavity is provided in the sliding baffle 8. A symmetrically distributed first filter screen 82 is fixed to the sliding baffle 8 for preliminarily screening the size of the crushed material. The screening cavity is connected to the space in the first rotating shell 5 through the first filter screen 82. The airflow enters the screening cavity through the first filter screen 82, and then flows into the first cavity 111 through the screening cavity. When the sliding baffle 8 is located at the third cavity 113, the sliding baffle 8 always keeps in contact with the connecting plate 121 under the action of the elastic force of the adjacent second elastic member 81. At this time, the first filter screen 82 is located in the sliding block 7, which will not cause the material to slide into the third cavity 113 through the first filter screen 82. A square sealing shell 83 is fixed to the outer side of the sliding block 7. The square sealing shell 83 slides and seals with the adjacent air vent 51 to prevent the qualified crushed material from moving between the sliding block 7 and the first rotating shell 5. The sliding baffle 8 is located in the adjacent square sealing shell 83.

[0038] Please refer to Fig.10 and Fig.11 The secondary grinding mechanism includes a feeding shell 14 fixed to the right side of the fixed shell 2, a discharging shell 15 fixed to the right side of the fixed frame 1, and the discharging shell 15 is provided with a discharging port for discharging materials. The discharging shell 15 is fixed to the feeding shell 14, and a second rotating shell 16 is rotatably connected in the discharging shell 15 for further ball milling the material. The second rotating shell 16 is provided with filter holes that are evenly distributed and communicated with the spaces in the adjacent discharging shells 15 for discharging the final qualified materials. The feeding shell 14 is fixedly connected and communicated with a discharging pipe. The feeding shell 14 is fixedly connected to a fixed plate 17 through the discharging pipe. The discharging pipe is communicated with the second rotating shell 16, and the airflow passes through the feeding shell 14. The discharge pipe drives the material into the second rotating shell 16. A metering device is provided in the discharge pipe to record the amount of material entering the second rotating shell 16. The fixed plate 17 is rotatably connected to the second rotating shell 16. A number of grinding steel balls with a diameter smaller than that of the grinding steel balls in the first rotating shell 5 are placed in the second rotating shell 16 for more fine grinding of the material. A middle grinding component for pre-grinding the material in the second rotating shell 16 is provided between the first rotating shell 5 and the feeding shell 14. A driving connection component for driving the second rotating shell 16 to rotate is provided on the side of the feeding shell 14 close to the discharge shell 15, and the driving connection component is electrically connected to the control terminal.

[0039] Please refer to Figure 10-12The middle grinding assembly includes a semi-conical shell 18 rotatably connected to the right side of the first rotating shell 5. The semi-conical shell 18 is fixedly connected to the circumferentially distributed dividing strips 11 to prevent the material in the first cavity 111 from flowing into the second cavity 112 and the third cavity 113. An extrusion block 19 is fixedly connected to the right side of the first rotating shell 5. Evenly distributed grinding hemispheres are fixedly connected to the right side of the extrusion block 19. Evenly distributed grinding hemispheres are fixedly connected to the left side of the feeding shell 14. The grinding hemispheres on the extrusion block 19 and the grinding hemispheres on the feeding shell 14 cooperate with each other to further grind the passing materials. The space between the feeding shell 14 and the extrusion block 19 is connected to the first cavity 111 for transmitting materials.

[0040] Please refer to Figure 10-13 , the driving connection assembly includes a rotating shaft 20 fixed to the right side of the extrusion block 19, and there is a gap between the rotating shaft 20 and the feeding shell 14, so that the material can pass through the gap when moving to the right, and the right side of the feeding shell 14 is rotatably connected to the connecting shell 21, and the connecting shell 21 and the second rotating shell 16 are transmitted through a gear set, wherein the right side of the connecting shell 21 is fixedly connected with a gear, and the left side of the second rotating shell 16 is fixedly connected with a gear ring, and the left side of the fixed plate 17 is rotatably connected with a transmission gear that is simultaneously meshed with the gear on the connecting shell 21 and the gear ring on the second rotating shell 16, and after being transmitted by the gear set, the speed of the connecting shell 21 is higher than that of the second rotating shell 16, so as to reduce the speed of the second rotating shell 16 and make its speed match the gravity of the grinding steel balls, so as to ensure the normal operation of the second rotating shell 16 and the grinding steel balls therein, and the connecting shell 21 is rotatably connected to the fixed plate 17, and the left side of the connecting shell 21 is rotatably connected. A sealing circular plate 211 is rotatably connected to the connecting shell 21, and a sliding ring 22 is spline-connected to the connecting shell 21 for driving the connecting shell 21 to rotate. A fixing ring 23 is rotatably connected to the left side of the sliding ring 22, and the fixing ring 23 is slidably connected to the sealing circular plate 211. An electric push rod 24 electrically connected to the control terminal is fixedly connected to the left side of the feeding shell 14, and the telescopic end of the electric push rod 24 is slidably connected to the fixing ring 23 to avoid mutual squeezing between the protrusion on the rotating shaft 20 and the adjacent semi-arc block 26, which causes damage to the device, and a fourth elastic member 25 is installed between the two, and the fourth elastic member 25 is a spring. Two semi-arc blocks 26 uniformly distributed in the circumferential direction are fixedly connected in the sliding ring 22, and two protrusions uniformly distributed in the circumferential direction and respectively squeezed and matched with the adjacent semi-arc blocks 26 are fixedly connected to the rotating shaft 20. When the two contact each other, power is transmitted, and a buffer component is provided in the semi-arc block 26 to buffer the impact of the protrusion on the rotating shaft 20.

[0041] Please refer to Fig.13 The buffer component includes a buffer plate 27 which is slidably connected to the adjacent semi-arc block 26 through a support rod, and a fifth elastic member 28 is installed between the two. The fifth elastic member 28 is a spring, which is used to buffer the hard collision between the protrusion on the rotating shaft 20 and the adjacent semi-arc block 26, so as to facilitate more stable power transmission.

[0042] When the staff uses the present device to make cement grinding aids, they first insert the existing feeding device into the feed pipe 3 and intermittently feed the material into the fixed shell 2. The staff synchronously starts the output end of the torque motor 4 through the control terminal to drive the feed pipe 3 to rotate through the gear set, and supplies air to the fixed shell 2 through the feed pipe 3 through the existing air supply device to promote the fluidity of small particle materials. The feed pipe 3 drives the first rotating shell 5 and the parts thereon to rotate together. The rotation direction of the first rotating shell 5 is clockwise (from left to right). When the first rotating shell 5 just starts to rotate, the grinding steel balls and materials therein rotate with the first rotating shell 5 under the extrusion of the sliding baffle 8 and the auxiliary extrusion plate 9. The insufficient rotation speed of the first rotating shell 5 in the initial state will not cause the grinding steel balls and materials to be subjected to insufficient centrifugal force, thereby causing the grinding steel balls and materials to stay at the bottom of the first rotating shell 5 for a long time under the action of their own gravity and unable to rotate.

[0043] When the grinding steel balls and the materials rotate to the upper rear side following the first rotating shell 5, the sliding baffle 8 and the auxiliary extrusion plate 9 rotate to a downwardly inclined state, and the support force provided by the sliding baffle 8 and the auxiliary extrusion plate 9 to the grinding steel balls and the materials continues to weaken. The gravity of the grinding steel balls is relatively large. When the gravity of the grinding steel balls is greater than the centrifugal force it receives and the support force of the sliding baffle 8, the grinding steel balls first slide downward under the action of gravity, and the materials with larger mass also slide downward under the action of their own gravity. At this time, the materials sliding downward and the materials staying in the first rotating shell The material on the inner wall of the first rotating shell 5 is gradually ground and crushed in the process of colliding with the grinding steel ball. When the grinding steel ball hits the material downward, it finally falls on the sliding block 7 near the third cavity 113 along a parabola. In the initial state, the sliding baffle 8 near the third cavity 113 slightly protrudes from the inner wall of the first rotating shell 5 under the pressure of the connecting plate 121 on the adjacent elastic airbag 12, but the first filter screen 82 thereon is not connected with the inner cavity of the first rotating shell 5, so as to prevent the material from flowing into the third cavity 113 through the first filter screen 82 on the sliding baffle 8.

[0044] When the grinding steel ball directly contacts the sliding block 7 during its descent, the sliding block 7 moves downward under the impact of the grinding steel ball, and the adjacent first elastic member 61 is squeezed and compressed by the sliding block 7 to store force, thereby buffering the impact force of the grinding steel ball. When the grinding steel ball collides with the adjacent sliding baffle 8 or the adjacent auxiliary squeezing plate 9 during the buffering process, taking the grinding steel ball contacting the sliding baffle 8 as an example (the two situations are similar), the grinding steel ball is in contact with the sliding block 7 and the sliding baffle 8 thereon at the same time. There are two contact points between the grinding steel ball and the two, so the pressure with a single contact point is lower than the pressure when it only collides with the existing liner, thereby reducing the wear of the grinding steel ball when it contacts the sliding block 7. When the grinding steel ball is falling, it first contacts the sliding baffle 8 on the grinding steel ball. When the sliding baffle 8 or the auxiliary extrusion plate 9 collides, take the case where the grinding steel ball collides with the sliding baffle 8 first (the two situations are similar), the sliding baffle 8 slides toward the outside of the first rotating shell 5 under the impact, and the adjacent second elastic member 81 is stretched and stored force to buffer the impact force of the grinding steel ball. When the sliding baffle 8 slides downward, the adjacent connecting plate 121 is squeezed downward together to provide a greater buffering effect for the sliding baffle 8. When the sliding baffle 8 is completely moved to be flush with the upper surface of the adjacent sliding block 7, the grinding steel ball contacts the upper surface of the adjacent sliding block 7. At this time, the grinding steel ball squeezes the sliding block 7 downward according to the same steps as above, and at this time, the grinding steel ball still has two contact points, thereby reducing the wear of the grinding steel ball.

[0045] In the process of the sliding block 7 rotating with the first rotating shell 5, when the sliding baffle 8 on the sliding block 7 rotates to contact the adjacent wedge block 122, the sliding baffle 8 moves upward under the pressure of the adjacent wedge block 122, so that the sliding baffle 8 retracts into the first rotating shell 5, thereby entering the first cavity 111 from the third cavity 113. When the sliding baffle 8 rotates to the first cavity 111, the sliding baffle 8 is always kept higher than the adjacent sliding block 7 under the pressure of the adjacent first extrusion plate 13. At this time, the screening cavity in the sliding baffle 8 communicates with the space in the first rotating shell 5 and the first cavity 111, and because the third cavity 113 is A cavity 111 is connected to the feeding shell 14, so the wind entering the first rotating shell 5 flows into the first cavity 111 through the screening cavity on the sliding baffle 8 near the first cavity 111, and finally flows out of the fixed shell 2 through the feeding shell 14. When the wind flows into the screening cavity, it drives the adjacent granular materials to gather in the screening cavity in the adjacent sliding baffle 8. When the material particles meet the aperture of the first filter screen 82, the qualified materials enter the screening cavity through the first filter screen 82, and are finally transported to the feeding shell 14 with the airflow, and transported to the next process. The unqualified materials remain in the first rotating shell 5 for further grinding and crushing.

[0046] When the material follows the airflow to flow to the feeding shell 14, the material enters between the feeding shell 14 and the extrusion block 19, and because the semi-conical shell 18 is fixedly connected to the adjacent dividing strip 11, the material is prevented from entering the second cavity 112 and the third cavity 113. Because the extrusion block 19 is fixedly connected to the first rotating shell 5, the first rotating shell 5 always drives the extrusion block 19 to rotate together during the rotation process, and the grinding hemisphere on the extrusion block 19 and the grinding hemisphere on the feeding shell 14 move relative to each other, and the two cooperate with each other to grind the material entering therein following the airflow, so that the material is ground into finer powder.

[0047] When the material passes between the extrusion block 19 and the feeding shell 14 driven by the airflow, the material flows to the right side of the feeding shell 14 through the gap between the feeding shell 14 and the rotating shaft 20, and then enters the second rotating shell 16 through the discharge pipe. The material will continue to be ground by the grinding steel balls in the second rotating shell 16 until the material is ground into qualified fine powder. Driven by the airflow, the material passes through the filter holes on the second rotating shell 16 and enters the discharge shell 15. Finally, the material is discharged outward through the discharge port under the action of the airflow.

[0048] When there is less material filled in the second rotating shell 16, the staff does not start the second rotating shell 16 to avoid mutual wear of the grinding steel balls in the second rotating shell 16 when there is little or no material. When the second rotating shell 16 is filled with enough material, the staff checks the data recorded by the metering device through the control terminal and starts the electric push rod 24 at the same time. The telescopic end of the electric push rod 24 extends out and drives the sliding ring 22 to move to the right through the fourth elastic member 25 by squeezing the fixed ring 23. When the sliding ring 22 and its upper semi-arc block 26 and other adjacent components contact the convex block on the rotating shaft 20 but cannot move to the same vertical plane, the fourth elastic member 25 is compressed and stored. When the rotating shaft 20 rotates with the squeezing block 19, the sliding ring 22 and its upper semi-arc block 26 are compressed and stored. When the arc block 26 and other adjacent components are offset from the protrusion on the rotating shaft 20, the sliding ring 22 and its upper semi-arc block 26 and other adjacent components move to the same vertical plane as the protrusion on the rotating shaft 20 under the action of the fourth elastic member 25. Subsequently, during the rotation of the rotating shaft 20, the protrusion on it first contacts the adjacent buffer plate 27. When the buffer plate 27 is subjected to force, it slides into the adjacent semi-arc block 26. The fifth elastic member 28 is compressed and accumulates force. The fifth elastic member 28 squeezes the semi-arc block 26 and the adjacent components to rotate together, thereby driving the connecting shell 21 to rotate. When the fifth elastic member 28 is compressed to the limit state, the protrusion on the rotating shaft 20 directly squeezes the semi-arc block 26 by squeezing the buffer plate 27 to rotate together. At this time, the rotation rate of the connecting shell 21 is the same as that of the rotating shaft 20.

[0049] When the connecting shell 21 rotates, the second rotating shell 16 is driven to rotate together through the gear set. At the same time, after the deceleration of the gear set, the rotation rate of the second rotating shell 16 is balanced with the gravity of the grinding steel balls therein, so as to ensure that the centrifugal force provided by the second rotating shell 16 to the grinding steel balls therein is balanced with the gravity of the grinding steel balls therein, so as to ensure that the grinding steel balls therein play the same function as the grinding steel balls in the first rotating shell 5.

[0050] When all materials have been ground, the user turns off the torque motor 4 through the control terminal, controls the electric push rod 24 to drive the adjacent parts to reset, and ventilates the device for simple cleaning.

[0051] Example 2: When the existing ball mill continuously discharges materials through airflow, the materials are easily blocked on the filter screen that filters the materials, and when the materials are broken to a size close to the filter holes of the filter screen, they still need to be ground with other materials by grinding steel balls. At this time, the grinding efficiency of the grinding steel balls for materials of this size is low.

[0052] Please refer to Figure 6-Figure 8 , and also includes an auxiliary grinding mechanism arranged in the sliding baffle 8, the auxiliary grinding mechanism is used to assist in grinding small pieces of material, the auxiliary grinding mechanism includes a plurality of groups of second filter screens 29 corresponding to the sliding baffle 8 one by one, each group includes two symmetrically distributed second filter screens 29, the filtering accuracy of the second filter screen 29 is higher than the filtering accuracy of the first filter screen 82, which is convenient for screening materials with a filtering accuracy close to the second filter screen 29, the second filter screen 29 is fixedly connected to the adjacent sliding baffle 8, and the second filter screen 29 is closer to the outside of the first rotating shell 5 than the first filter screen 82, the screening cavity of the sliding baffle 8 is connected to the adjacent square sealing shell 83 through the adjacent second filter screen 29, the inner side of the sliding baffle 8 is rotatably connected with a baffle plate 30, and a sixth elastic member 31 is installed between the baffle plate 30 and the sliding baffle 8, and the sixth elastic member 31 It is a torsion spring, and it is initially in a force storage state. The baffle plate 30 is closed to ensure the sealing of the screening cavity. The staff uses the existing device to supply air to the second cavity 112 and the third cavity 113, rather than supplying air from the feed pipe 3 to the first rotating shell 5. The air supply from the second cavity 112 is convenient for discharging the material in the adjacent sliding baffle 8. The third cavity 113 is provided with an exhaust duct connected to the first cavity 111, which is used to assist in discharging the material accidentally falling into the third cavity 113 to the first cavity 111. The fixed shell 2 is fixedly connected to the second cavity 112 with second extrusion plates 32 that are evenly distributed and respectively extruded and matched with the adjacent sliding baffles 8. The left side of the second extrusion plate 32 is provided with an inclined surface, which is used to lift the adjacent sliding baffle 8, so as to facilitate the recoil of the adjacent second filter screen 29 and the adjacent first filter screen 82.

[0053] When the staff feeds materials into the first rotating shell 5 through the feeding pipe 3, they no longer supply air into the first rotating shell 5 through the feeding pipe 3, but supply air into the second cavity 112 and the third cavity 113 through the air supply device. After the airflow enters the second cavity 112, it flows into the first rotating shell 5 through the sliding baffle 8. After the airflow enters the third cavity 113, it flows horizontally through the exhaust duct and finally flows into the first cavity 111, sending the accidentally entered materials into the correct material transportation path for real-time cleaning of the third cavity 113 to avoid the entry of the third cavity 113 into the ground qualified materials due to accidents. When the sliding baffle 8 moves to the vicinity of the first cavity 111, although some materials have been screened by the first filter screen 82, they have not yet reached the screening conditions of the second filter screen 29. These materials are left in the screening cavity in the sliding baffle 8. When the sliding baffle 8 follows the rotation of the adjacent sliding block 7 and just rotates to the second cavity 112, the sliding baffle 8 is not in contact with the second extrusion plate 32 at this time. Under the action of the elastic force of the adjacent second elastic member 81, the sliding baffle 8 moves upward to a position in contact with the fixed shell 2. At this time, the sliding baffle 8 is retracted into the sliding block 7, but the first filter screen 82 is still in the sliding block 7, and the first filter screen 82 has not entered the square sealing shell 83. The airflow enters the screening cavity through the second filter screen 29 and drives the material to move downward. When the material and the airflow move to the baffle plate 30, the material rushes through the baffle plate 30 driven by the airflow, and the baffle plate 30 rotates open. The material continues to rush out downward under the action of the airflow, and the sixth elastic member 31 twists and accumulates force. The rushed out material hits the grinding steel ball that freely falls to the lower right side, and the material is further crushed.

[0054] When the sliding baffle 8 continues to rotate following the adjacent sliding block 7, when the sliding baffle 8 contacts the second extrusion plate 32, the sliding baffle 8 is squeezed by the second extrusion plate 32 and gradually extends downward to its longest state. At this time, the first filter screen 82 extends into the first rotating shell 5 again. After the airflow enters the screening cavity through the second filter screen 29, it flows out into the first rotating shell 5 through the first filter screen 82, and backwashes the second filter screen 29 and the first filter screen 82. At this time, all the materials are discharged, the blowing force of the airflow on the baffle plate 30 is reduced, and the baffle plate 30 is twisted and reset under the drive of the adjacent sixth elastic member 31.

[0055] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A graded grinding device for cement grinding aids, comprising a fixed frame (1), characterized in that: The invention also comprises a fixed shell (2), wherein the fixed shell (2) is fixedly connected to the upper side of the fixed frame (1), the fixed frame (1) and the fixed shell (2) are rotatably connected to a feed pipe (3), a torque motor (4) is fixedly connected to a side of the fixed frame (1) close to the feed pipe (3), an output shaft of the torque motor (4) and the feed pipe (3) are driven by a gear set, the feed pipe (3) is fixedly connected in the fixed shell (2) and is connected to a first rotating shell (5), a plurality of grinding steel balls are placed in the first rotating shell (5), the first rotating shell (5) is provided with a plurality of evenly distributed groups of ventilation holes (51) and sliding holes (52), each group comprising a plurality of ventilation holes (51) and sliding holes (52) in a circumferential array, the first rotating shell (5) is fixedly connected to a plurality of groups of ventilation holes (51) and sliding holes (52), The holes (51) are connected to fixed blocks (6) one by one, each group comprises evenly distributed fixed blocks (6), the fixed blocks (6) in the same group are slidably connected to a sliding block (7), a first elastic member (61) is installed between the sliding block (7) and the adjacent fixed block (6), the sliding block (7) is slidably connected to a sliding baffle (8), and a second elastic member (81) is installed between the two, a plurality of sealing blocks (10) are fixedly connected in the first rotating shell (5) and are respectively slidably sealed with the adjacent sliding blocks (7), a ventilation mechanism for guiding the flow of materials is arranged between the first rotating shell (5) and the fixed shell (2), and a secondary grinding mechanism for further grinding the materials in the first rotating shell (5) is arranged on a side of the fixed frame (1) away from the fixed shell (2).

2. The graded grinding device for cement grinding aid according to claim 1, characterized in that: The sliding block (7) is slidably connected to an auxiliary extrusion plate (9), and a third elastic member (91) is installed between the two. The auxiliary extrusion plate (9) is slidably connected to the sliding hole (52).

3. The graded grinding device for cement grinding aid according to claim 2, characterized in that: The ventilation mechanism comprises circumferentially distributed dividing strips (11), the circumferentially distributed dividing strips (11) are all fixedly connected to the fixed shell (2), the dividing strips (11) are rotatably connected to the first rotating shell (5), the dividing strips (11) divide the space between the first rotating shell (5) and the fixed shell (2) into three cavities, namely a first cavity (111), a second cavity (112) and a third cavity (113), wherein the second cavity (112) is located on the upper side and the third cavity (113) is located on the lower side, the fixed shell (2) is provided with a buffer component for buffering the adjacent sliding baffle (8) near the third cavity (113), and the fixed shell (2) is provided with a screening component for collecting materials after primary grinding near the first cavity (111).

4. The graded grinding device for cement grinding aid according to claim 3, characterized in that: The buffer assembly comprises an elastic airbag (12), the elastic airbag (12) being fixedly connected to the fixing frame (1) near the third cavity (113), a plurality of evenly distributed connecting plates (121) being fixedly connected to one side of the elastic airbag (12) near the first rotating shell (5), the connecting plates (121) being pressed and matched with the adjacent sliding baffles (8) and the adjacent auxiliary extrusion plates (9), wherein evenly distributed wedge blocks (122) are fixedly connected to the connecting plates (121) near the first cavity (111), the wedge blocks (122) being pressed and matched with the adjacent sliding baffles (8).

5. The graded grinding device for cement grinding aid according to claim 4, characterized in that: The screening material assembly comprises uniformly distributed first extrusion plates (13), the number of the first extrusion plates (13) being the same as the number of groups of the vent holes (51), the first extrusion plates (13) being fixedly connected to the fixed shell (2) near the first cavity (111), the first extrusion plates (13) being extruded and matched with the adjacent sliding baffle (8), a screening cavity being arranged in the sliding baffle (8), a symmetrically distributed first filter screen (82) being fixedly connected to one side of the sliding baffle (8) near the axis of the first rotating shell (5), the screening cavity being communicated with the space inside the first rotating shell (5) through the first filter screen (82), a square sealing shell (83) being fixedly connected to one side of the sliding block (7) near the vent hole (51), the square sealing shell (83) slidingly and sealingly matched with the adjacent vent hole (51), the sliding baffle (8) being located in the adjacent square sealing shell (83).

6. The graded grinding device for cement grinding aid according to claim 5, characterized in that: The secondary grinding mechanism comprises a feeding shell (14), the feeding shell (14) being fixedly connected to a side of the fixed shell (2) away from the feeding pipe (3), a discharge shell (15) being fixedly connected to a side of the fixed frame (1) away from the fixed shell (2), the discharge shell (15) being fixedly connected to the feeding shell (14), a second rotating shell (16) being rotatably connected inside the discharge shell (15), the second rotating shell (16) being provided with filtering holes which are evenly distributed and are all connected to the spaces inside the adjacent discharge shells (15), the feeding shell (14) being fixedly connected to and connected to a discharge pipe, the feeding shell (14) being fixedly connected to a A fixed plate (17) and a discharge pipe are connected to the second rotating shell (16), a metering device is arranged in the discharge pipe, the fixed plate (17) is rotatably connected to the second rotating shell (16), a plurality of grinding steel balls with a diameter smaller than that of the grinding steel balls in the first rotating shell (5) are placed in the second rotating shell (16), a middle grinding component for pre-grinding the material in the second rotating shell (16) is arranged between the first rotating shell (5) and the feeding shell (14), and a driving connection component for driving the second rotating shell (16) to rotate is arranged on a side of the feeding shell (14) close to the discharge shell (15).

7. The graded grinding device for cement grinding aid according to claim 6, characterized in that: The middle grinding assembly comprises a semi-conical shell (18), the semi-conical shell (18) being rotatably connected to a side of the first rotating shell (5) close to the feeding shell (14), the semi-conical shell (18) being fixedly connected to the circumferentially distributed dividing strips (11), the side of the first rotating shell (5) close to the feeding shell (14) being fixedly connected to an extrusion block (19), the side of the extrusion block (19) close to the feeding shell (14) being fixedly connected to uniformly distributed grinding hemispheres, the side of the feeding shell (14) close to the first rotating shell (5) being fixedly connected to uniformly distributed grinding hemispheres, and the space between the feeding shell (14) and the extrusion block (19) being connected to the first cavity (111).

8. The graded grinding device for cement grinding aid according to claim 7, characterized in that: The driving connection assembly comprises a rotating shaft (20), the rotating shaft (20) being fixedly connected to a side of the extrusion block (19) close to the feeding shell (14), a gap being present between the rotating shaft (20) and the feeding shell (14), the feeding shell (14) being rotatably connected to a connecting shell (21), the connecting shell (21) and the second rotating shell (16) being driven by a gear train, the connecting shell (21) being rotatably connected to the fixing plate (17), the connecting shell (21) being rotatably connected to a sealing circular plate (211), the connecting shell (21) being spline-connected to a sliding ring (22), the sliding ring (22) being close to the sealing circular plate (211). A fixing ring (23) is rotatably connected to one side of the feeding shell (14), an electric push rod (24) is fixedly connected to the feeding shell (14), a telescopic end of the electric push rod (24) is slidably connected to the fixing ring (23), and a fourth elastic member (25) is installed between the two, the fixing ring (23) is slidably connected to the sealing circular plate (211), semi-arc blocks (26) uniformly distributed in the circumferential direction are fixedly connected in the sliding ring (22), and convex blocks uniformly distributed in the circumferential direction and respectively pressed and matched with adjacent semi-arc blocks (26) are fixedly connected to the rotating shaft (20), and a buffer component is provided in the semi-arc block (26) for buffering the impact of the convex blocks on the rotating shaft (20) 9. A graded grinding device for cement grinding aid according to claim 8, characterized in that: The buffer component comprises a buffer plate (27), the buffer plate (27) being slidably connected to the adjacent semi-arc block (26) via a support rod, and a fifth elastic member (28) being installed between the two.

10. The classifying grinding device for cement grinding aid according to claim 7, characterized in that: The invention also comprises an auxiliary grinding mechanism for auxiliary grinding of small pieces of material, the auxiliary grinding mechanism being arranged in the sliding baffle (8), the auxiliary grinding mechanism comprising a plurality of groups of second filter screens (29), each group comprising symmetrically distributed second filter screens (29), the filtering accuracy of the second filter screens (29) being higher than the filtering accuracy of the first filter screens (82), the number of groups of the second filter screens (29) corresponding to the sliding baffles (8), and the second filter screens (29) being fixedly connected to adjacent sliding baffles (8). The sliding baffle (8) screening cavity is connected to the adjacent square sealing shell (83) through the adjacent second filter screen (29); the sliding baffle (8) is rotatably connected to a baffle plate (30) near the axis of the first rotating shell (5); a sixth elastic member (31) is installed between the baffle plate (30) and the sliding baffle (8); and the fixed shell (2) is fixedly connected to second extrusion plates (32) evenly distributed and respectively extruded and matched with the adjacent sliding baffles (8) near the second cavity (112).

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