Mixing machine stirring device for producing magnesia-calcium bricks

Abstract

The utility model belongs to the technical field of magnesium-calcium brick processing, and particularly relates to a mixing machine stirring device for producing magnesium-calcium bricks, which comprises a vertical cylinder, a feed pipe and a motor are arranged at the top of the vertical cylinder, a discharge pipe is arranged at the bottom of the vertical cylinder, a motor drives a central shaft and a stirring paddle, and a discharge sleeve is detachably sleeved on the discharge pipe. A lifting gate plate and a mechanism for driving the gate plate are arranged in the sleeve, the driving mechanism comprises a mounting seat fixed in the sleeve, a guide column and a rotatable stud are arranged on the mounting seat, and the gate plate is in threaded fit with the stud and is in sliding connection with the guide column; the double-screw bolt is driven to rotate through the rocking handle, the shaft column and the bevel gear pair, so that the flashboard is controlled to ascend and descend, and during stirring, the flashboard ascends and extends into a discharging pipe opening to seal the discharging pipe opening, and materials are prevented from entering to form a dead zone; and during discharging, the flashboard descends to open the channel. The discharging pipe thoroughly solves the problem of uneven mixing caused by material residues in the discharging pipe, and is simple and reliable in structure and convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] This utility model relates to the field of magnesium-calcium brick processing technology, and in particular to a mixing device for producing magnesium-calcium bricks. Background Technology

[0002] As an important alkaline refractory material, the production process of magnesia-calcium bricks requires the uniform mixing of raw materials to ensure the stable performance and excellent quality of the finished bricks. Currently, the mixing equipment commonly used in the production of magnesia-calcium bricks is a vertical mixer, which typically includes a cylinder, drive motor, mixing shaft and blades. The material is added from the top feed port, mixed, and then discharged from the bottom discharge port.

[0003] However, in actual use, it has been found that the bottom discharge pipe of the existing vertical mixer usually leaves a part of the material behind during the mixing process. Since this part of the material is located outside the main working area of ​​the mixing blade, it is difficult to be effectively stirred and mixed. It remains in a relatively static state for a long time, which easily leads to sedimentation or stratification, resulting in a decrease in the uniformity of the entire batch of materials. When a batch of materials is mixed and discharged, this part of the "dead zone" material remaining in the discharge pipe will be discharged last. Its composition and particle size may differ from the main mixture. If it directly enters the next process or is mixed with the next batch of materials, it will affect the uniformity and stability of the product quality.

[0004] Although some equipment attempts to improve the bottom mixing effect by optimizing the shape of the mixing paddle or adding auxiliary mixing devices, the structural "dead zone" problem of the discharge pipe itself has not been fundamentally solved. Therefore, there is an urgent need for a mixing device for producing magnesium-calcium bricks that can effectively solve the problem of material residue in the discharge pipe and ensure the overall uniformity of the mixture. Utility Model Content

[0005] Based on the technical problems existing in the prior art, this utility model proposes a mixing device for producing magnesium-calcium bricks.

[0006] This utility model discloses a mixing device for producing magnesium-calcium bricks, comprising a vertical cylinder with an inlet pipe at the top and an outlet pipe at the bottom. A motor is fixedly installed at the top of the cylinder, and the output shaft of the motor is connected to a central shaft extending into the cylinder. A mixing paddle is mounted on the central shaft. The improvement lies in that an outlet sleeve is detachably fitted onto the outlet pipe. A gate plate movable along its axis is installed inside the outlet sleeve, and a drive mechanism is also provided on the outlet sleeve to drive the gate plate. When material mixing is required, the drive mechanism controls the gate plate to move upwards until its top extends into and closes the outlet pipe opening, thereby temporarily isolating the outlet pipe from the mixing chamber and preventing material from entering the outlet pipe and forming a "dead zone." After mixing is completed, the gate plate is then controlled to move downwards, opening the outlet channel for normal material discharge.

[0007] Preferably, the driving mechanism includes a mounting base fixedly installed inside the discharge sleeve, at least one vertically arranged guide post fixed on the mounting base, the gate plate slidably sleeved on the guide post, and a vertically arranged stud rotatably connected to the mounting base, the gate plate and the stud being threadedly engaged.

[0008] Preferably, the driving mechanism further includes a transmission assembly for driving the stud to rotate. The transmission assembly includes a shaft that is horizontally rotatably connected to the outer wall of the discharge sleeve. The inner end of the shaft extends into the discharge sleeve and is fixed with a first bevel gear. The bottom end of the stud is fixed with a second bevel gear that meshes with the first bevel gear. A crank handle is installed on the outer end of the shaft.

[0009] Preferably, a protective cover is fixedly installed at the bottom of the mounting base, and both the first bevel gear and the second bevel gear are located inside the protective cover.

[0010] Preferably, the top of the discharge sleeve is provided with multiple threaded holes, and each threaded hole is screwed with a locking bolt.

[0011] Preferably, the inner wall of the discharge sleeve is further provided with an inwardly protruding positioning ring, on which an annular sealing ring can be placed.

[0012] Preferably, the top end of the guide post passes through the gate plate and forms a T-shaped structure. A limiting ring is also fitted on the guide post. The limiting ring is located below the gate plate and is fixed to the guide post by fasteners.

[0013] Compared with the prior art, the present invention provides a mixing device for producing magnesium-calcium bricks, which has the following advantages:

[0014] 1. This utility model, by installing a discharge sleeve with a liftable gate on the discharge pipe, can raise the gate to the position of closing the discharge pipe opening during the mixing stage, completely eliminating the possibility of materials entering the discharge pipe and forming a "mixing dead zone", ensuring that all materials in the cylinder can be fully acted on by the mixing paddle, thereby significantly improving the mixing uniformity of the entire batch of materials, laying a solid foundation for the subsequent production of high-quality magnesium-calcium brick products.

[0015] 2. The discharge sleeve of this utility model is detachably fixed to the discharge pipe by locking bolts, which is very convenient for installation and disassembly. This allows users to regularly clean and maintain the inside of the discharge sleeve, the gate plate and the transmission mechanism, and prevent material scaling from affecting the performance of the equipment.

[0016] 3. This utility model, through the design of a positioning ring and an optional sealing ring, enables the same device to be adapted to discharge pipes with different outer diameters. It does not require major modifications to the main structure of the existing vertical mixer. The main new components are concentrated outside the discharge port, resulting in low modification costs. It is easy to add and upgrade existing equipment, making it highly practical and reducing the cost for manufacturers to keep multiple specifications of spare parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This utility model Figure 2 A magnified structural diagram at point A;

[0020] Figure 4 This is a schematic diagram of the gate of this utility model when it is open;

[0021] Figure 5 This is a schematic diagram of the structure of the discharge sleeve of this utility model, which is installed on a small-sized discharge pipe through a sealing ring.

[0022] In the diagram: 1. Vertical cylinder; 101. Feed pipe; 102. Discharge pipe; 2. Motor; 3. Central shaft; 4. Agitator; 5. Discharge sleeve; 501. Threaded hole; 502. Positioning ring; 6. Gate plate; 7. Mounting base; 8. Guide column; 9. Stud; 10. Shaft column; 11. First bevel gear; 12. Second bevel gear; 13. Handle; 14. Protective cover; 15. Locking bolt; 16. Sealing ring; 17. Limiting ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Reference Figures 1-5A mixing device for producing magnesia-calcium bricks is disclosed. The main body of the mixing device is a vertical cylinder 1, typically made of steel. A feed pipe 101 is welded or flanged to the top center or upper side of the vertical cylinder 1 for feeding raw materials such as magnesia sand and limestone powder for magnesia-calcium bricks. The bottom of the vertical cylinder 1 is conical or flat and connected to a vertically downward discharge pipe 102. A drive motor 2 is fixedly mounted on the top of the vertical cylinder 1 via a base. The output shaft of the motor 2 is connected to a vertical central shaft 3 via a coupling, and the central shaft 3 extends into the interior of the vertical cylinder 1. Multiple stirring paddles 4 are fixedly mounted at different heights on the central shaft 3 by welding or keying. The stirring paddles 4 can be paddle-type, spiral-belt-type, etc., and are used to mix the materials inside the cylinder under the drive of the motor 2.

[0026] The key improvement of this utility model is integrated into a detachable discharge sleeve 5, which is a tubular component with an inner diameter slightly larger than the outer diameter of the discharge pipe 102. To securely fix the discharge sleeve 5 to the discharge pipe 102, multiple threaded holes 501 are evenly distributed along the circumference of its top end face, with a locking bolt 15 screwed into each threaded hole 501. During installation, the discharge sleeve 5 is first fitted onto the discharge pipe 102, adjusted to a suitable height, and then each locking bolt 15 is tightened sequentially using a wrench. The ends of the bolts will press tightly against the outer wall of the discharge pipe 102, achieving a secure connection between the two.

[0027] Inside the discharge sleeve 5, a mounting base 7 is fixedly installed. The mounting base 7 can be fixed to the inner wall of the discharge sleeve 5 by welding or screw connection. A vertically arranged stud 9 is rotatably connected to the mounting base 7 via a bearing. On the side of the stud 9, at least one vertical guide post 8 is also fixed to the mounting base 7. A disc-shaped gate 6 is horizontally arranged, with open holes corresponding to the number of guide posts 8, and a threaded hole located in the center. The gate 6 slides on the guide post 8 through the open holes, and at the same time, its central threaded hole forms a threaded engagement with the stud 9. In this way, when the stud 9 rotates, the gate 6 is prevented from rotating with it due to the constraint of the guide post 8, and the gate 6 will move in a vertical straight line along the guide post 8 under the action of the threaded pair. To ensure that the gate plate 6 will not detach from above, the top of the guide post 8 is machined into a T-shaped head. At the same time, a limiting ring 17 (which can be fixed by a set screw) is also fixedly fitted on the guide post 8 at the position below the gate plate 6 to limit the extreme position of the downward movement of the gate plate 6, that is, the fully open position.

[0028] To drive the stud 9 to rotate, this invention features a manual transmission mechanism. A shaft 10 is horizontally mounted on the side wall of the discharge sleeve 5 via bearings. The inner end of the shaft 10 extends into the discharge sleeve 5 and is fixedly mounted with a first bevel gear 11. At the bottom of the stud 9, a second bevel gear 12, meshing with the first bevel gear 11, is fixedly mounted. The outer end of the shaft 10 extends to the outside of the discharge sleeve 5 and is fitted with a crank handle 13 for easy gripping and force application. When the operator rotates the crank handle 13 clockwise or counterclockwise, power is transmitted through the shaft 10 to the first bevel gear 11, which in turn drives the meshing second bevel gear 12 and the stud 9 to rotate together, ultimately raising and lowering the gate 6. To protect the bevel gears exposed inside the discharge sleeve 5 cavity, a protective cover 14 is fixedly mounted at the bottom of the mounting base 7, completely enclosing the first bevel gear 11 and the second bevel gear 12, effectively preventing powder from falling into the gear meshing area.

[0029] The working principle of this utility model is as follows:

[0030] Before starting the mixing operation of a new batch of materials, the operator first confirms that the discharge sleeve 5 is correctly installed on the discharge pipe 102. Then, the operator turns the crank handle 13 counterclockwise (depending on the specific thread direction). The rotation of the crank handle 13 is transmitted through the shaft 10, the first bevel gear 11, and the second bevel gear 12, driving the stud 9 to rotate. Since the gate plate 6 is restricted from rotating by the guide post 8, it moves upward along the guide post 8 under the action of the thread. The gate plate 6 continues to rise, and its top gradually enters the interior of the upper discharge pipe 102. The operator continues to turn the crank handle 13 until obvious resistance is felt, indicating that the top of the gate plate 6 has risen to a position that is almost flush with or slightly in contact with the inner end face of the top of the discharge pipe 102. At this time, the lower opening of the discharge pipe 102 is effectively closed by the gate plate 6 (e.g., Figure 3 (State). Then, the raw materials can be fed into the vertical cylinder 1 through the feed pipe 101, and the motor 2 is started to drive the stirring paddle 4 to mix. During this process, since the inlet of the discharge pipe 102 is blocked by the gate 6, all materials are sealed in the main chamber of the vertical cylinder 1, and no materials will fall into the "dead zone" of the discharge pipe 102, thus ensuring that all materials can be fully and evenly mixed.

[0031] When the mixing process reaches the predetermined time and the materials are uniformly mixed, it is ready to discharge. At this time, turning the crank handle 13 clockwise reverses the operation of the transmission mechanism, driving the stud 9 to rotate in the opposite direction. This causes the gate 6 to move downwards along the guide post 8, gradually withdrawing the gate 6 from the discharge pipe 102 and opening the discharge channel. When the gate 6 descends to the point where its bottom surface contacts the upper limit ring 17 of the guide post 8, it reaches the fully open position (e.g., ...). Figure 4(State), at this time, the mixed material is smoothly discharged through the discharge pipe 102 and the internal space of the discharge sleeve 5 under the action of gravity, and the unloading is completed. Since there is no material residue during the mixing process, the discharged material is uniform.

[0032] For mixers with smaller outer diameters of the discharge pipe 102, this invention also considers an adaptation solution. A ring-shaped boss, i.e., a positioning ring 502, is machined on the inner wall of the discharge sleeve 5. Users can prepare one or more ring-shaped sealing rings 16 of suitable thickness (such as rubber rings or polyurethane rings) according to the actual outer diameter of their discharge pipe 102. During installation, first, place the selected sealing ring 16 into the discharge sleeve 5, allowing it to sit on the positioning ring 502. Then, fit the discharge sleeve 5 onto the smaller discharge pipe 102. At this point, the inner ring of the sealing ring 16 is tightly against the outer wall of the discharge pipe 102, while the outer ring is blocked by the positioning ring 502, precisely filling the annular gap between the inner wall of the discharge sleeve 5 and the outer wall of the discharge pipe 102. Finally, tighten the locking bolt 15 as described above to achieve the same stable installation (e.g., ...). Figure 5 As shown in the figure, this ensures the wide applicability of the device.

[0033] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A mixing device for producing magnesium-calcium bricks, comprising a vertical cylindrical body (1), wherein the top of the vertical cylindrical body (1) is provided with a feed pipe (101) and the bottom is provided with a discharge pipe (102), a motor (2) is fixedly installed on the top of the vertical cylindrical body (1), the output shaft of the motor (2) is connected to a central shaft (3) extending into the interior of the vertical cylindrical body (1), and a stirring paddle (4) is provided on the central shaft (3), characterized in that: A discharge sleeve (5) is detachably fitted onto the discharge pipe (102). Inside the discharge sleeve (5) is a gate (6) that can move along its axis. The discharge sleeve (5) is also provided with a driving mechanism for driving the gate (6) to move. When the gate (6) is driven to move upward to the limit position, its top end extends into and closes the opening of the discharge pipe (102).

2. The mixing device for producing magnesium-calcium bricks according to claim 1, characterized in that: The driving mechanism includes a mounting base (7) fixedly installed inside the discharge sleeve (5), at least one vertically arranged guide post (8) is fixed on the mounting base (7), and the gate plate (6) is slidably sleeved on the guide post (8); a vertically arranged stud (9) is also rotatably connected to the mounting base (7), and the gate plate (6) is threadedly engaged with the stud (9); the driving mechanism also includes a transmission component for driving the stud (9) to rotate.

3. The mixing device for producing magnesium-calcium bricks according to claim 2, characterized in that: The transmission assembly includes a shaft (10) that is horizontally rotatably connected to the outer wall of the discharge sleeve (5). The inner end of the shaft (10) extends into the discharge sleeve (5) and is fixed with a first bevel gear (11). The bottom end of the stud (9) is fixed with a second bevel gear (12) that meshes with the first bevel gear (11). The outer end of the shaft (10) is equipped with a crank handle (13).

4. The mixing device for producing magnesium-calcium bricks according to claim 3, characterized in that: A protective cover (14) is fixedly installed on the bottom of the mounting base (7), and the first bevel gear (11) and the second bevel gear (12) are both located inside the protective cover (14).

5. The mixing device for producing magnesium-calcium bricks according to claim 1, characterized in that: The top circumferential opening of the discharge sleeve (5) is provided with multiple threaded holes (501), and each threaded hole (501) is screwed with a locking bolt (15). By tightening the locking bolt (15), its end is pressed against the outer wall of the discharge pipe (102), thereby fixing the discharge sleeve (5) on the discharge pipe (102).

6. The mixing device for producing magnesium-calcium bricks according to claim 5, characterized in that: The inner wall of the outlet sleeve (5) is also provided with a positioning ring (502) that protrudes inward, and an annular sealing ring (16) can be placed on the positioning ring (502).

7. The mixing device for producing magnesium-calcium bricks according to claim 2, characterized in that: The top of the guide post (8) passes through the gate plate (6) and forms a T-shaped structure; a limiting ring (17) is also fitted on the guide post (8), and the limiting ring (17) is located below the gate plate (6).

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