Automatic Feeding System for Calcium Carbonate Calcination Furnace

Abstract

The present invention provides an automatic feeding system for a calcium carbonate calcining furnace, which relates to the technical field of calcium carbonate production equipment. The system includes a weighing unit, a transfer unit, and a lifting unit. The weighing unit is used to weigh the material and is provided with a vertical channel. A baffle that can close or communicate with the channel is rotatably connected to the weighing unit. The lifting unit includes a gantry, a hopper, and a first winch. The top and one end of the hopper are both open. The two sides of the hopper are vertically slidably connected to the gantry and can rotate relative to each other. A limiting component is provided on the hopper to prevent it from deflecting excessively. The first winch is installed on the top of the gantry and is connected to the open end of the hopper through a steel wire rope. The transfer unit is located below the channel and is used to transfer the material onto the hopper; it solves the problems of low feeding accuracy and high labor intensity in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of calcium carbonate production equipment, and more particularly to an automatic feeding system for a calcium carbonate calcination furnace. Background Art

[0002] Using a vertical kiln to calcine calcium carbonate to produce light calcium is a commonly used method in the production of light calcium. In this method, during the production process, feeding is required from the top of the furnace. Currently, the feeding is carried out by manually using a trolley to transport limestone and coal to the bottom of the calcination furnace, and then using a winch to lift the trolley to the top of the furnace. Finally, the limestone and coal are manually poured into the furnace at the top of the furnace. This not only results in a very high labor intensity and requires multiple people to cooperate to complete the furnace charge addition operation, but also leads to a low feeding accuracy. Summary of the Invention

[0003] Aiming at the deficiencies in the prior art, the present invention provides an automatic feeding system for a calcium carbonate calcination furnace, which solves the problems of low feeding accuracy and high labor intensity in the prior art.

[0004] According to an embodiment of the present invention, the automatic feeding system for a calcium carbonate calcination furnace includes a weighing unit, a transfer unit, and a lifting unit. The weighing unit is used to weigh the materials and is provided with a vertical channel. A baffle that can close or communicate with the channel is rotatably connected to the weighing unit. The lifting unit includes a gantry, a hopper, and a first winch. The top and one end of the hopper are both open. The two sides of the hopper are vertically slidably connected to the gantry and can rotate relative to each other. A limiting component for preventing the hopper from deflecting excessively is provided on the hopper. The first winch is installed on the top of the gantry and is connected to the open end of the hopper through a steel wire rope. The transfer unit is located below the channel and is used to transfer the materials onto the hopper.

[0005] Compared with the prior art, the present invention has the following beneficial effects: By providing a vertical channel in the weighing unit and rotatably connecting a baffle in the weighing unit, the baffle deflects to connect or close the channel, so as to temporarily store the material in the channel for weighing and then introduce it onto the transfer unit; By providing the top and one end of the hopper with openings, slidably connecting the two sides of the hopper vertically to the gantry and enabling them to rotate relative to each other, providing a limiting component on the hopper, and connecting the first winch to the open end of the hopper, the transfer unit can conveniently transfer the material into the hopper. Moreover, during the process of the first winch lifting the hopper upward, the limiting component limits the hopper, and the hopper can rise with a good posture. When the hopper rises to a predetermined height, the first winch can appropriately relax the hopper so that it deflects in the reverse direction under the action of the gravity of the material and itself (in practice, the steel wire rope can form a certain angle with the vertical plane to facilitate the reverse deflection of the open end of the hopper when relaxing the hopper. Of course, an electric push rod can also be provided at the top of the gantry. The electric push rod retracts to facilitate the smooth rise of the hopper, and the electric push rod extends to vertically limit the end of the hopper away from the opening, so that the open end of the hopper deflects). At this time, the hopper introduces the material onto the furnace top; Therefore, by adopting the above scheme, the material is weighed first and then lifted and fed. The entire feeding process has a high degree of automation, which reduces the labor intensity of workers and the feeding amount is relatively accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0007] Figure 2 is a schematic diagram of the structure of the weighing unit in an embodiment of the present invention;

[0008] Figure 3 is Figure 2 a schematic diagram of the internal structure of;

[0009] Figure 4 is a schematic diagram of the structure of the inner shell in an embodiment of the present invention;

[0010] Figure 5 is a schematic diagram of the structure of the transfer unit in an embodiment of the present invention;

[0011] Figure 6 is a schematic diagram of the structure of the lifting unit in an embodiment of the present invention;

[0012] Figure 7 is Figure 6 a partial enlarged view of A in;

[0013] In the above-mentioned drawings: 1. Baffle; 2. Gantry; 3. Hopper; 4. First winch; 5. Steel wire rope; 6. Outer shell; 7. Inner shell; 8. Motor; 9. Driving gear; 10. Driven gear; 11. Spring scale; 12. First photoelectric switch; 13. Track; 14. Trolley; 15. Second driving mechanism; 16. Discharge door; 17. Third driving mechanism; 18. Second photoelectric switch; 19. First roller; 20. Lugs; 21. Second roller. Detailed implementation mode

[0014] The technical solutions in the present invention will be further described below in conjunction with the drawings and embodiments.

[0015] As Figure 1 , Figure 3 , Figure 6 and Figure 7 shown, the automatic feeding system for a calcium carbonate calcination furnace proposed in the embodiment of the present invention includes a weighing unit, a transfer unit, and a lifting unit. The weighing unit is used to weigh the material and is provided with a vertical channel. A baffle 1 that can close or communicate with the channel is rotatably connected to the weighing unit. The lifting unit includes a gantry 2, a hopper 3, and a first winch 4. The top and one end of the hopper 3 are open. The two sides of the hopper 3 are vertically slidably connected to the gantry 2 and the two can rotate relative to each other. A limiting component for preventing the hopper 3 from deflecting excessively is provided on the hopper 3. It should be understood that the above-mentioned excessive limit is based on the fact that the hopper 3 can stably hold the material without dumping when it deflects. The first winch 4 is installed on the top of the gantry 2 and is connected to the open end of the hopper 3 through a steel wire rope 5. Among them, the specific structures and connection methods of the first winch 4 and the steel wire rope 5 are all conventional technical means in the art and will not be elaborated here; the transfer unit is located below the channel and is used to transfer the material that has fallen through the channel onto the hopper 3.

[0016] By providing a vertical channel in the weighing unit and rotatably connecting a baffle 1 within the weighing unit, the baffle 1 deflects to connect or close the channel, so as to temporarily store the material in the channel for weighing and then introduce it onto the transfer unit; by providing the top and one end of the hopper 3 with open ends, slidably connecting the two sides of the hopper 3 vertically to the gantry 2 and enabling them to rotate relative to each other, providing a limiting component on the hopper 3, and connecting the first winch 4 to the open end of the hopper 3, the transfer unit can conveniently transfer the material into the hopper 3. Moreover, during the process of the first winch 4 lifting the hopper 3 upward, the limiting component limits the hopper 3, and the hopper 3 can rise with a good attitude. When the hopper 3 rises to a predetermined height, the first winch 4 can appropriately relax the hopper 3 so that it deflects reversely under the action of the gravity of the material and itself (in practice, the steel wire rope 5 can form a certain angle with the vertical plane to facilitate the reverse deflection of the open end of the hopper 3 when the hopper 3 is relaxed. Of course, an electric push rod can also be provided at the top of the gantry 2. The electric push rod retracts to facilitate the smooth rise of the hopper 3, and the electric push rod extends to vertically limit the end of the hopper 3 away from the open end so that the open end of the hopper 3 deflects). At this time, the hopper 3 introduces the material to the furnace top; therefore, by adopting the above solution, the material is weighed first and then lifted and fed, and the degree of automation of the entire feeding process is relatively high, thus reducing the labor intensity of workers and the feeding amount is relatively accurate.

[0017] Such as Figures 2 to 4As shown in the figure, the embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace. The weighing unit includes an outer shell 6 and an inner shell 7. To facilitate feeding and the bottom of the inner shell 7 to slide out of the outer shell 6, both the upper and lower ends of the outer shell 6 are open. A first driving mechanism is installed on the inner shell 7, and the first driving mechanism is connected to the baffle 1 to drive its deflection. In this embodiment, the first driving mechanism takes the motor 8 as an example. The motor 8 is installed on the outer side wall of the inner shell 7 and a driving gear 9 is sleeved on its output shaft. A third shaft is fixedly connected to the baffle 1, and one end of the third shaft extends out of the inner shell 7 and is sleeved with a driven gear 10 that meshes with the driving gear 9. When the motor 8 rotates, it drives the baffle 1 to deflect. It should be understood that in order to maintain the stability of the position of the baffle 1, the motor 8 should be selected as a conventional motor 8 with a locking function. To enable the baffle 1 to deflect smoothly inside the inner shell 7, the circumferential side of the baffle 1 should be in clearance fit with the inner wall of the inner shell 7; the top of the inner shell 7 is open and its bottom is closed to form a material channel. The inner shell 7 is vertically movably connected inside the outer shell 6 and its top is connected to the top of the outer shell 6 through a spring scale 11. Among them, the above-mentioned movable connection can be a sliding connection by means of a conventional setting of a slide rail and a slider. The spring scale 11 is also a conventional spring scale 11, and its specific internal structure will not be elaborated here. A first photoelectric switch 12 is provided at the bottom of the outer shell 6, and the first photoelectric switch 12 is electrically connected to the first driving mechanism. The above-mentioned electrical connection method is a conventional technical means in the relevant technical field and will not be elaborated here. Preferably, the first photoelectric switch 12 is selected as a slot type photoelectric switch; adopting the above solution, when the material enters the inner cavity of the inner shell 7 from the top of the inner shell 7, at this time the baffle 1 closes the channel of the inner shell 7, and the material is temporarily stored on the baffle 1. As the material increases, the inner shell 7 moves downward under the drive of the material gravity, overcoming the elastic force of the spring scale 11. When the bottom of the inner shell 7 extends out of the outer shell 6 and blocks the first photoelectric switch 12, the first photoelectric switch 12 controls the motor 8 to rotate so that the baffle 1 deflects to open the channel for discharging. In practice, the installation height of the first photoelectric switch 12 in the vertical direction can be matched with the elastic coefficient of the spring scale 11 to realize the quantitative weighing of the material by the weighing unit; of course, an electronic scale can also be directly fixedly installed on the baffle 1, and the deflection of the baffle 1 is controlled by using the numerical feedback of the electronic scale, so as to cancel the setting of the outer shell 6 and the first photoelectric switch 12. The specific control process is also a conventional technical means in the relevant field and will not be elaborated here (for example, a conventional PLC controller is used to receive the data feedback of the electronic scale and control the rotation of the motor 8 according to the feedback), but because the material drops from a height, the impact on the electronic scale is relatively large, so its service life is not as long as that of the mechanical spring scale 11.

[0018] As Figure 1 and Figure 5As shown, an embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace, wherein the transfer unit includes a track 13, a trolley 14 and a second driving mechanism 15. The track 13 is tilted and its lower end faces the gantry 2. The trolley 14 is rollingly connected to the track 13. The second driving mechanism 15 is connected to the trolley 14 to drive it to move along the track 13. The top of the trolley 14 and the end thereof facing the gantry 2 are both open. The open end of the trolley 14 is movably connected to a discharge door 16, and the discharge door 16 is connected to a third driving mechanism 17 for driving it to open and close. The third driving mechanism 17 of this embodiment takes a third winch as an example. The discharge door 16 is vertically slidably connected to the open end of the trolley 14. The third winch is installed on the trolley 14 and is connected to the discharge door 16. The track 13 is connected by a rigid rope, and a second photoelectric switch 18 is provided at the lower end thereof. The second photoelectric switch 18 is electrically connected to the third drive mechanism 17. The above-mentioned electrical connection is a conventional technical means and will not be described in detail here. The second photoelectric switch 18 is preferably a slot-type photoelectric switch. With the above-mentioned scheme, since the track 13 is tilted, the second drive mechanism 15 uses a conventional second winch and is connected to the trolley 14 through a rigid rope to drive the trolley 14 to climb along the track 13. The trolley 14 can go downhill under the action of its own weight, and the trolley 14 can simply and reliably move back and forth between the weighing unit and the lifting unit. When the trolley 14 reaches the bottom end of the track 13, the second photoelectric switch 18 controls the third winch to lift the discharge door 16, and the material in the trolley 14 slides into the hopper 3 under its own weight.

[0019] like Figure 6 and Figure 7 As shown, an embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace. In order to realize the sliding connection between the hopper 3 and the gantry 2 and enable the two to rotate relative to each other, a slide groove is provided on the opposite side of the gantry 2, and the two side walls of the hopper 3 are respectively connected to the first roller 19 through the first axis, and each first roller 19 is rollingly connected in the slide groove; the slide groove guides the hopper 3 and each first roller 19 can reduce wear.

[0020] like Figure 1 、 Figure 6 and Figure 7 As shown, an embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace, wherein the hopper 3 is L-shaped and its longer side is located on the side of the gantry 2 away from the track 13. To further facilitate the rotation of the hopper 3 relative to the gantry 2, each first shaft is rotatably connected to the inflection point of the hopper 3. With the above-mentioned scheme, setting the longer side of the hopper 3 on the side of the gantry 2 away from the track 13 is conducive to the hopper 3 rising to the specified height (at this time the first winch 4 is properly unwound), and the open end of the hopper 3 automatically deflects in the opposite direction, and its longer side facilitates the introduction of materials into the furnace top.

[0021] like Figure 6 and Figure 7As shown, the embodiment of the present invention provides an automatic feeding system for a calcium carbonate calcining furnace. To further facilitate the material to slide out of the hopper 3, the inflection point of the hopper 3 is provided with an arc transition.

[0022] like Figure 6 and Figure 7 As shown, an embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace, wherein the limiting assembly includes a lug 20 and a second roller 21, the lug 20 being fixedly connected to the hopper 3, the second roller 21 being rotatably connected to the lug 20 via a second shaft, and the second roller 21 being in rolling contact with the side of the gantry 2 facing away from the track 13; using the above scheme, when the first winch 4 lifts the hopper 3, the second roller 21 limits the deflection of the hopper 3 to prevent excessive deflection thereof from causing material to pour out, and the second roller 21 also plays a role in reducing friction.

[0023] like Figure 3 As shown, an embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace. To prevent material from leaking from the gap between the inner shell 7 and the outer shell 6, the top of the inner shell 7 is in a trumpet shape with a larger top and a smaller bottom, and the inner shell 7 is in a gap-matched shape with the outer shell 6.

[0024] like Figures 2 to 4 As shown, an embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace, wherein a mounting block is fixedly connected to the top of the outer shell 6, a fixed end of a spring scale 11 is fixedly connected to the mounting block, and a movable end of the spring scale 11 is connected to the top of the inner shell 7; the mechanical spring scale 11 has a simple structure and stronger impact resistance.

[0025] The embodiment of the present invention proposes an automatic feeding system for a calcium carbonate calcining furnace. To further realize the automation of the system, it also includes a conveyor belt (not shown in the figure). The conveyor belt is connected to the channel and is used to transport materials to the baffle 1.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. The automatic feeding system for a calcium carbonate calcination furnace is characterized in that: It includes a weighing unit, a transfer unit and a lifting unit. The weighing unit is used to weigh materials and is provided with a vertical channel. A baffle (1) that can close or communicate with the channel is rotatably connected to the weighing unit. The lifting unit includes a gantry (2), a hopper (3) and a first winch (4). The top and one end of the hopper (3) are both open. The two sides of the hopper (3) are vertically slidably connected to the gantry (2) and the two can rotate relative to each other. A limiting component is provided on the hopper (3) to prevent it from deflecting excessively. The first winch (4) is installed on the top of the gantry (2) and is connected to the open end of the hopper (3) through a steel wire rope (5). The transfer unit is located below the channel and is used to transfer materials onto the hopper (3); The transfer unit includes a track (13). The track (13) is inclined and its lower end faces the gantry (2); Chute grooves are provided on both opposite sides of the gantry (2). First rollers (19) are respectively rotatably connected to the two side walls of the hopper (3) through first shafts. Each of the first rollers (19) is in rolling connection with the chute grooves; The limiting component includes an ear (20) and a second roller (21). The ear (20) is fixedly connected to the hopper (3). The second roller (21) is rotatably connected to the ear (20) through a second shaft. The second roller (21) is in rolling contact with the side of the gantry (2) facing away from the track (13); The weighing unit includes a housing (6) and an inner housing (7). Both the upper and lower ends of the housing (6) are open. A first driving mechanism is installed on the inner housing (7). The first driving mechanism is connected to the baffle (1) to drive its deflection. The top of the inner housing (7) is open and its bottom is closed. The inner housing (7) is vertically movably connected inside the housing (6) and its top is connected to the top of the housing (6) through a spring scale (11). A first photoelectric switch (12) is provided at the bottom of the housing (6). The first photoelectric switch (12) is electrically connected to the first driving mechanism.

2. The automatic feeding system for a calcium carbonate calcination furnace according to claim 1, wherein: The transfer unit includes a trolley (14) and a second driving mechanism (15). The trolley (14) is in rolling connection on the track (13). The second driving mechanism (15) is connected to the trolley (14) to drive it to move along the track (13). The top of the trolley (14) and its end facing the gantry (2) are both open. A discharge door (16) is movably connected to the open end of the trolley (14). The discharge door (16) is connected to a third driving mechanism (17) for driving its opening and closing. A second photoelectric switch (18) is provided at the lower end of the track (13). The second photoelectric switch (18) is electrically connected to the third driving mechanism (17).

3. The automatic feeding system for calcium carbonate calcining furnace according to claim 2, characterized in that: The hopper (3) is in an L shape and its longer side is located on the side of the gantry (2) facing away from the track (13). Each of the first shafts is respectively rotatably connected to the inflection point of the hopper (3).

4. The automatic feeding system for calcium carbonate calcination furnace according to claim 3, characterized in that: The arc at the inflection point of the hopper (3) is in smooth transition.

5. The automatic feeding system for a calcium carbonate calcination furnace according to claim 1, wherein: The top of the inner shell (7) is in the shape of a horn with a larger upper part and a smaller lower part, and it is in clearance fit with the outer shell (6).

6. The automatic feeding system for a calcium carbonate calcination furnace according to claim 1, wherein: A mounting block is fixedly connected to the top of the outer shell (6). The fixed end of the spring scale (11) is fixedly connected to the mounting block, and the movable end of the spring scale (11) is connected to the top of the inner shell (7).

7. The automatic feeding system for a calcium carbonate calcination furnace according to claim 1, wherein: It further includes a conveyor belt, which is communicated with the channel and is used to transport materials onto the baffle (1).

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