Cement screening grinderTechnical Field
The invention relates to the technical field of cement screening and grinding, in particular to a cement screening and grinding device.
Background
Cement is a powdery hydraulic inorganic cementing material, is slurry after being added with water and stirred, can be hardened in air or water, can firmly bond sand, stone and other materials together, and is a common basic building material. However, in a scene where the demand for cement use is high, the caking component is not allowed to be contained in the cement, and therefore, it is necessary to treat the cement to reuse the caking component.
Disclosure of Invention
The invention aims to provide a cement sieving and grinding device which is used for sieving and grinding the cement blocks so as to achieve the effect of recycling.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The cement screening and grinding device comprises a screening unit and a grinding unit, wherein the screening unit comprises a screen, the grinding unit comprises an upper pressing plate assembly and a lower pressing plate assembly, the upper pressing plate assembly comprises an upper pressing plate and a first driving mechanism, and the first driving mechanism is used for driving the upper pressing plate to reciprocate up and down; the lower pressure plate assembly comprises a lower pressure plate, a supporting piece and a second driving mechanism, wherein a blanking hole is formed in the lower pressure plate, the lower pressure plate is located below the upper pressure plate, the lower pressure plate is assembled on the supporting piece in a floating mode, and the second driving mechanism is used for driving the supporting piece to reciprocate in the horizontal direction.
Further, the screening unit further comprises a receiving plate, and the receiving plate is positioned below the screen.
Further, screen cloth, receiving board all slope connect in the frame, are equipped with the feeder hopper in the frame, and the feeder hopper is located the one end of screen cloth, and the other end and the holding down plate cooperation of screen cloth to flow into blocky cement on the holding down plate, screen cloth one side is equipped with the vibrator.
Further, a plurality of rows of blanking holes are formed in the lower pressing plate and used for allowing ground cement to fall down, and the receiving plate extends to the lower side of the supporting piece.
Further, the first driving mechanism comprises a motor and a speed reducer, a first eccentric wheel is arranged at the tail end of the speed reducer, a first rocker is hinged to the first eccentric wheel, a first reciprocating rod is hinged to the other end of the first rocker, the first reciprocating rod is assembled on the frame along the up-down direction, and the lower end of the first reciprocating rod is connected with the upper pressing plate; the second driving mechanism comprises a motor and a speed reducer, a second eccentric wheel is arranged at the tail end of the speed reducer, a second rocker is hinged to the second eccentric wheel, a second reciprocating rod is hinged to the other end of the second rocker, the second reciprocating rod is assembled on the frame along the horizontal direction, and one end of the second reciprocating rod is connected with the supporting piece.
Further, a plurality of guide posts are arranged on the support piece, the lower pressing plate is assembled on the guide posts in a guiding way along the up-down direction, and an elastic piece is arranged between the lower pressing plate and the support piece.
Further, the support piece is provided with a spring column, the elastic piece adopts a spring, the spring is sleeved on the spring column, two ends of the spring are respectively abutted against the support piece and the upper pressing plate, and the upper end of the guide column or the upper end of the spring column is provided with a limiting structure which is used for limiting the floating stroke of the lower pressing plate.
Further, the supporting piece is a rectangular frame, four corners of the supporting piece are respectively provided with a guide post, the upper side of the lower pressing plate is provided with a guide seat, and the guide posts penetrate through the guide seats; the upper part of the spring column is provided with a nut, and the nut forms the limit structure.
Further, the lower side of the supporting piece is provided with a roller, and the roller moves along the guide rail in a straight line.
Further, when the upper pressing plate moves downwards to contact with the lower pressing plate, the lower pressing plate moves from left to right, and the upper pressing plate continues to move downwards and presses the lower pressing plate, so that the upper pressing plate and the lower pressing plate are pressed mutually and slide relatively.
The invention has the beneficial effects that:
When the cement sieving and grinding device is used, slightly caked cement is poured into the screen mesh, and powdery cement falls down through the screen mesh, and because a certain distance is reserved between the upper pressing plate and the lower pressing plate in an initial state, caked cement can enter the lower pressing plate. The first driving mechanism drives the upper pressing plate to move downwards until the upper pressing plate contacts the lower pressing plate, the second driving mechanism starts to act and drives the supporting piece to move from left to right, the lower pressing plate is pushed downwards by the upper pressing plate while moving rightwards along with the supporting piece, the lower pressing plate continues to move rightwards, the upper pressing plate and the lower pressing plate are extruded mutually and slide relatively, and grinding of caking cement among the pressing plates is promoted. Along with the action of the driving mechanism, the upper pressing plate starts to move upwards, the lower pressing plate returns to the original height, and the agglomerated cement enters between the upper pressing plate and the lower pressing plate and is ground and crushed in a circulating and reciprocating mode.
Drawings
FIG. 1 is a perspective view of a cement screening grinding apparatus of the present invention;
fig. 2 is a structural view of the grinding unit of fig. 1;
FIG. 3 is a perspective view of the screen of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
fig. 5 is a perspective view of the chute of fig. 1.
1. A frame; 11. a feed hopper; 12. a suspension arm; 21. a screen; 211. a chute; 22. a receiving plate; 31. a speed reducer; 32. a first eccentric; 33. a first rocker; 34. a first guide sleeve; 35. a first reciprocating lever; 4. an upper press plate; 5. a lower pressing plate; 51. a blanking hole; 52. a material blocking strip; 6. a support; 61. a roller; 62. a spring post; 63. a spring; 64. a guide post; 65. a nut; 66. a guide seat; 71. a second eccentric; 72. a second rocker; 73. a second reciprocating lever; 74. a second guide sleeve; 8. and a guide rail.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
Embodiments of the invention:
As shown in fig. 1, the cement screening and grinding device comprises a screening unit and a grinding unit, wherein the screening unit comprises a screen 21 and a receiving plate 22, and the receiving plate 22 is positioned below the screen 21. The screen 21 and the receiving plate 22 are obliquely connected to the frame 1. Be equipped with feeder hopper 11 on frame 1, feeder hopper 11 is located the left end of screen cloth 21, and the right-hand member and the holding down plate 5 cooperation of screen cloth 21, the right-hand member of screen cloth 21 are equipped with a chute 211 to slide the caking cement on holding down plate 5, get into the grinding unit and grind the processing.
In use, slightly agglomerated cement is poured from hopper 11 into screen 21 and the powdered cement is shaken down into receiving plate 22 by a vibrator on one side of screen 21 and the agglomerated cement is vibrated into chute 211. The vibrator can adopt the existing vibration motor. Since the right end of the screen 21 does not substantially act as a screen, a chute 211 is provided to facilitate the entry of agglomerated cement into the grinding unit.
The screen 21 and the receiving plate 22 are connected to the frame 1 through the suspension arms 12, the suspension arms 12 are arranged on the front side and the rear side of the frame 1, and the upper ends of the suspension arms 12 are fixed with the frame 1. The screen 21 is provided with bolt holes on the side edges, and is connected with the boom 12 by bolts. The bolt holes on the side of the screen 21 or the corresponding bolt holes on the suspension arm 12 can be long holes, so that the inclination angle of the screen 21 can be adjusted.
As shown in fig. 2, the grinding unit includes an upper platen assembly and a lower platen assembly, the upper platen assembly includes an upper platen 4 and a first driving mechanism, and the first driving mechanism is used for driving the upper platen 4 to reciprocate up and down. The first driving mechanism comprises a motor and a speed reducer 31, a first eccentric wheel 32 is arranged at the tail end of the speed reducer 31, a first rocker 33 is hinged on the first eccentric wheel 32, a first reciprocating rod 35 is hinged at the other end of the first rocker 33, and the first reciprocating rod 35 is assembled on the frame 1 along the up-down direction. The frame 1 is provided with a first guide sleeve 34 for the first reciprocating rod 35 to pass through and guide. The first eccentric wheel 32 rotates, and the first reciprocating bar 35 is driven to move up and down by the first rocking bar 33. The lower end of the first reciprocating lever 35 is connected to the upper platen 4 so that the upper platen 4 operates synchronously. In the present embodiment, the speed reducer 31 is a cycloidal pin gear speed reducer. In other embodiments, other types of existing speed reducers may be used.
As shown in fig. 2, the lower platen assembly includes a lower platen 5, a supporting member 6 and a second driving mechanism, the lower platen 5 is located below the upper platen 4, and a plurality of rows of blanking holes 51 are formed in the lower platen 5 for ground cement to fall down. The lower pressing plate 5 is assembled on the supporting piece 6 in a floating mode, the second driving mechanism is used for driving the supporting piece 6 to reciprocate in the horizontal direction, and the grinding of the massive cement is achieved by means of the relative movement of the upper pressing plate 4 and the lower pressing plate 5. The front and rear sides of the lower pressing plate 5 in the blanking hole 51 area are respectively provided with a material blocking strip 52 to prevent the cement from falling from the front and rear directions in the grinding process.
As shown in fig. 1, the right end of the receiving plate 22 extends below the supporting member 6, and can collect cement falling from the lower platen 5.
As shown in fig. 2, the supporting member 6 is a rectangular frame, four corners of the supporting member 6 are respectively provided with a guide post 64, the upper side of the lower pressing plate 5 is provided with a guide seat 66, and the guide posts 64 pass through the guide seat 66. The lower platen 5 is assembled to the guide post 64 by being guided in the up-down direction by the guide holder 66. The middle part of the support 6 is empty and does not affect blanking.
As shown in fig. 2, an elastic member is provided between the lower platen 5 and the support member 6, and the elastic member adopts a spring 63. Four spring posts 62 are arranged on the support member 6, and springs 63 are sleeved on the spring posts 62. Both ends of the spring are respectively abutted against the supporting piece 6 and the upper pressing plate 4. The upper part of the spring post 62 is provided with a nut 65, the nut 65 forms a limiting structure, and the nut 65 and the spring 63 jointly define the floating stroke of the lower pressure plate 5. In other embodiments, a limiting structure may be disposed at the upper end of the guide post to limit the upward movement limit position of the guide seat. In other embodiments, the guide post may be directly sleeved with a spring.
The second driving mechanism is similar to the first driving mechanism in principle, and realizes the reciprocating linear motion of the executing piece. As shown in fig. 1 and 2, the second driving mechanism comprises a motor and a speed reducer, the tail end of the speed reducer is provided with a second eccentric wheel 71, a second rocker 72 is hinged on the second eccentric wheel 71, one end of the second rocker 72 is hinged with a second reciprocating rod 73, the second reciprocating rod 73 is assembled on the frame 1 along the horizontal direction, and the left end of the second reciprocating rod 73 is connected to the right side of the supporting piece 6. The frame 1 is provided with a second guide sleeve 74 for the second reciprocating rod 73 to pass through.
As shown in fig. 2, the lower side of the support 6 is provided with rollers 61, and the rollers 61 move linearly along the guide rail 8. The guide rails 8 are two, are respectively positioned at the front side and the rear side of the receiving plate 22, and the number of the rollers 61 is four. The support 6 with the rollers 61 forms a movable trolley. In other embodiments, the support 6 may also be a direct sliding fit on the rail 8.
The working principle of the cement sieving and grinding device is as follows:
The slightly agglomerated cement is poured from the hopper 11 into the screen 21, the powdery cement is shaken down into the receiving plate 22 by a vibrator (not shown) on one side of the screen 21, and the agglomerated cement is vibrated into the chute 211, the right end of the chute 211 being slightly higher than the lower platen 5. In the initial state, a certain distance is reserved between the upper pressing plate 4 and the lower pressing plate 5, so that the agglomerated cement can enter the lower pressing plate 5. The first driving mechanism is started, the upper pressing plate 4 moves downwards, when the upper pressing plate is contacted with the lower pressing plate 5, the second driving mechanism starts to act and drives the supporting piece 6 to move from left to right, the lower pressing plate 5 is pushed downwards by the upper pressing plate 4 when moving rightwards along with the supporting piece 6, the lower pressing plate 5 continues to move rightwards, the upper pressing plate and the lower pressing plate are mutually extruded and relatively slide, and grinding of caking cement between the pressing plates is promoted. Along with the continuous rotation of the first eccentric wheel 32 and the second eccentric wheel 71, the upper pressing plate 4 starts to move upwards, the lower pressing plate 5 also returns to the original height under the action of the spring 63, the upper pressing plate and the lower pressing plate start to separate, at the moment, the screened agglomerated cement enters between the upper pressing plate and the lower pressing plate again, and along with the continuous movement of the upper pressing plate and the lower pressing plate, the agglomerated cement is repeatedly ground and crushed.
For a clearer understanding of the movement stroke of the upper platen 4, the distance of the upper platen 4 from the highest point to the lowest point is defined as a; the distance of the working surface of the lower platen 5 from the highest point of the upper platen 4 is 2a/3 in the natural state of the spring. After the upper platen 4 contacts the lower platen 5, the lower platen 5 can be pushed downward by a/3.