An adjustable zoned unloading platform

Abstract

The application discloses an adjustable partition unloading platform, which comprises a plurality of movable unloading plates and a shell, the shell is arranged at the bottom of a kiln, a supporting beam is arranged in the inner cavity of the shell, the plurality of movable unloading plates are arranged on the supporting beam in the circumferential direction of the shell, a unloading channel is arranged between the outer side of each movable unloading plate and the inner wall of the shell, and the movable unloading plate is connected with a driving device, the driving device drives the movable unloading plate to move back and forth, so that the material above the movable unloading plate enters the corresponding unloading channel to be unloaded. The application can ensure that the unloading points of the unloaded material are uniformly distributed around the kiln bottom bin, meanwhile, the unloading speed is uniform and smooth; in addition, by controlling the related hydraulic driving device, the application realizes regional and quantitative unloading, has good adjustability, combines the temperature distribution characteristics of the lime kiln calcination chamber, preferentially unloads the finished products that are calcined, simultaneously, transports the limestone that needs to be continuously calcined to a high-temperature field, and further completes the calcination.

Description

Technical Field

[0001] This invention specifically relates to an adjustable partitioned unloading platform. Background Technology

[0002] For industrial kilns such as lime kilns, blast furnaces, and vertical shaft kilns that calcine minerals, the unloading process refers to discharging the finished material from the kiln chamber into the kiln bottom silo via a unloading device. During calcination production in the kiln chamber, various process parameters constantly change. Therefore, the unloading mechanism should have stepless control capabilities to adjust the unloading volume in real time according to the production process parameters. Furthermore, the unloading speed should be kept as uniform as possible, and the unloading points should be distributed as evenly as possible around the kiln bottom silo. Currently, most vertical kilns on the market use ordinary disc unloading mechanisms. Due to the operating principle of this mechanism, its main drawbacks include uneven unloading positions, inability to achieve zoned unloading, and uneven unloading speed. Therefore, there is an urgent need to develop a new type of unloading platform mechanism to solve these problems. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an adjustable partitioned unloading platform that can ensure that the unloaded material drop points are evenly distributed around the kiln bottom silo, in view of the above-mentioned defects in the prior art.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] An adjustable zoned unloading platform includes multiple movable unloading plates and a shell. The shell is located at the bottom of the kiln chamber, and a support beam is provided inside the shell cavity. The multiple movable unloading plates are arranged on the support beam along the circumference of the shell. Each movable unloading plate has a unloading channel between its outer side and the inner wall of the shell. Each unloading channel is arranged around the circumference of the shell cavity. The movable unloading plates are connected to a drive device, which drives the movable unloading plates to move back and forth, so that the material above the movable unloading plates enters the corresponding unloading channel for unloading. The translational displacement of the movable unloading plates is small and is not used to close or open the corresponding unloading channels. When the drive device drives the movable unloading plates to move back and forth, the material above the corresponding movable unloading plates is loosened, and the material flows from the center of the shell to the corresponding unloading channel around the shell cavity and enters the corresponding unloading channel for unloading. When the movable unloading plates stop moving, the material above the corresponding movable unloading plates stops flowing into the unloading channel.

[0006] According to the above technical solution, each movable unloading plate is individually connected to a driving device, which is a hydraulic driving device; a transmission rod assembly is connected between the hydraulic driving device and the movable unloading plate.

[0007] According to the above technical solution, a fixed baffle is provided at the central axis of the kiln chamber. The fixed baffle is set on the support beam and arranged on one side of the movable unloading plate.

[0008] According to the above technical solution, a central cone is provided on the central axis of the unloading channel inside the shell, the central cone is set on the support beam, and the fixed baffle is arranged at the lower part of the central cone.

[0009] According to the above technical solution, a roller assembly is provided between the movable unloading plate and the support beam. The roller assembly can deflect relative to the movable unloading plate and the support beam, and the movable unloading plate moves back and forth through the support beam on the roller assembly.

[0010] According to the above technical solution, the roller assembly includes a roller, an upper base plate and a lower base plate. The upper base plate is welded and fixed to the bottom of the movable unloading plate, and the lower base plate is welded and fixed to the support beam. The roller is set between the upper base plate and the lower base plate.

[0011] According to the above technical solution, the end of the roller shaft is provided with a limiting end plate, which is connected and fixed to the roller shaft by a bolt assembly. The upper and lower base plates are provided with grooves, and the upper and lower ends of the limiting end plate are provided with flanges. The flanges at the upper and lower ends of the limiting end plate are respectively inserted into the grooves of the upper and lower base plates, and the roller shaft can roll between the upper and lower base plates, thereby causing the upper and lower base plates to move relative to each other.

[0012] According to the above technical solution, the axial direction of the roller is perpendicular to the moving direction of the corresponding moving unloading plate.

[0013] According to the above technical solution, the hydraulic drive device is driven by a linear motion hydraulic cylinder, and the stroke of the hydraulic cylinder is adjustable.

[0014] According to the above technical solution, the base of the hydraulic drive device is connected to the housing by a bolt group.

[0015] According to the above technical solution, proximity switches are provided at the front and rear limit positions of the moving unloading plate, and a proximity switch is also provided at the middle position between the front and rear limit positions. The proximity switches are connected to the control unit; a sensing plate is provided at the end of the hydraulic rod of the hydraulic drive device.

[0016] The present invention has the following beneficial effects:

[0017] This invention ensures that the discharged material is evenly distributed around the kiln bottom chamber, with a uniform and smooth discharge speed. Furthermore, by controlling the relevant hydraulic drive device, it achieves zoned and quantitative discharge with good adjustability. By arranging the discharge channel close to the periphery of the shell, and considering the temperature distribution characteristics inside the kiln during lime calcination, this invention prioritizes the timely and controllable discharge of the calcined finished product, avoiding over-burning. Simultaneously, taking advantage of the higher temperature at the periphery of the shell, it fully utilizes the heat there, using the discharge action to transport material that still needs further calcination from the center to the periphery for continued calcination, ultimately completing the discharge. This invention also ensures that the discharged material is evenly distributed around the kiln bottom chamber and allows for stepless adjustment of the discharge volume. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the adjustable partition unloading platform in an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 This is a schematic diagram of the limit position of the reciprocating motion of the moving unloading plate of the unloading platform in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the adjustable partitioned unloading platform in an embodiment of the present invention.

[0022] Figure 5 yes Figure 2 A partial B-view;

[0023] Figure 6 yes Figure 5 CC section view;

[0024] Figure 7 yes Figure 2 A partial C-view;

[0025] In the figure, 1-hydraulic drive device, 2-moving unloading plate, 3-fixed baffle, 4-shell, 5-central cone, 6-support beam, 7-roller assembly, 8-transmission rod assembly, 9-upper base plate, 10-roller, 11-lower base plate, 12-limiting end plate, 13-connecting bolt group, 15-connecting flange, 16-first pin, 17-first self-lubricating spherical bearing, 18-connecting rod, 19-second pin, 20-second self-lubricating spherical bearing, 21-base of hydraulic drive device. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Reference Figures 1 to 7 As shown, an adjustable partitioned unloading platform according to one embodiment of the present invention includes multiple movable unloading plates 2 and a housing 4. The housing 4 is located at the bottom of the kiln chamber, and a support beam 6 is provided inside the housing 4. The multiple movable unloading plates 2 are arranged circumferentially on the support beam 6 along the housing 4. Each movable unloading plate 2 has a unloading channel between its outer side and the inner wall of the housing 4. Each unloading channel is arranged circumferentially along the inner cavity of the housing 4. The movable unloading plates 2 are connected to a driving device, which drives the movable unloading plates 2 to move back and forth, allowing the material above the movable unloading plates 2 to enter the kiln chamber. The material is discharged into the corresponding discharge channel. The translational displacement of the movable discharge plate 2 is small and is not used to close or open the corresponding discharge channel. When the drive device drives the movable discharge plate 2 to move back and forth, the material above the corresponding movable discharge plate 2 is loosened. The material flows from the center of the shell 4 to the corresponding discharge channel around the shell 4 and enters the corresponding discharge channel for discharge. When the movable discharge plate 2 stops moving, the material above the corresponding movable discharge plate 2 stops flowing into the discharge channel. The shell 4 and the support beam 6 together serve as support components to accommodate the material in the kiln chamber.

[0028] When the kiln is used for calcining lime, the uneven distribution of heating airflow within the kiln results in higher temperatures near the perimeter of the kiln shell and relatively lower temperatures in the center. Consequently, material near the perimeter completes calcination first. Conversely, material in the center, due to its lower temperature, requires further heating and calcination. To address these kiln process characteristics for lime calcination, an adjustable zoned unloading platform was developed. This platform prioritizes unloading the already calcined material near the perimeter. Another feature is that during unloading, it can transport material in the center of the kiln that still requires calcination to the perimeter, utilizing the higher temperatures there for final calcination, and then unloading it there.

[0029] Furthermore, each movable unloading plate 2 is individually connected to a drive device, which is a hydraulic drive device 1. A transmission rod assembly 8 is connected between the hydraulic drive device 1 and the movable unloading plate 2. The movement limit positions of the movable unloading plate 2 are set as the front limit position and the rear limit position, respectively. The stroke of the valve body of the hydraulic drive device 1 is adjustable.

[0030] Furthermore, there are four movable unloading plates 2. The support beam 6 is equipped with four movable unloading plates 2 that can move independently, dividing the inner cavity of the shell 4 into four unloading areas.

[0031] Furthermore, a fixed baffle 3 is provided at the central axis of the kiln chamber inside the shell 4. The fixed baffle 3 is set on the support beam and arranged on one side of the movable discharge plate, so that the material gathers towards the discharge port.

[0032] Furthermore, a central cone 5 is provided on the central axis of the unloading channel inside the shell 4, and the central cone 5 is located above the support beam; so that the material in the middle of the unloading channel inside the shell 4 is distributed to each unloading port in the circumferential direction, and a fixed baffle is arranged at the lower part of the central cone.

[0033] Furthermore, a roller assembly 7 is provided between the movable unloading plate 2 and the support beam 6. The roller assembly 7 can deflect relative to the movable unloading plate 2 and the support beam 6, and the movable unloading plate 2 moves back and forth on the support beam 6 through the roller assembly 7.

[0034] Furthermore, the roller assembly 7 includes a roller 10, an upper base plate 9, and a lower base plate 11. The upper base plate 9 is welded and fixed to the bottom of the movable unloading plate 2, and the lower base plate 11 is welded and fixed to the support beam 6. The roller 10 is disposed between the upper base plate 9 and the lower base plate 11.

[0035] Furthermore, the end of the roller 10 is provided with a limiting end plate 12, which is connected and fixed to the roller 10 by a bolt assembly. The upper base plate 9 and the lower base plate 11 are both provided with grooves. The upper end and the lower end of the limiting end plate 12 are both provided with flanges. The flanges at the upper end and the lower end of the limiting end plate 12 are respectively inserted into the grooves of the upper base plate 9 and the lower base plate 11, and the roller 10 can deflect relative to the upper base plate 9 and the lower base plate 11.

[0036] Furthermore, the axial direction of the roller 10 is perpendicular to the moving direction of the corresponding moving unloading plate 2.

[0037] Furthermore, the roller 10 can deflect between the upper base plate 9 and the lower base plate 11, so that the moving unloading plate 2 will not get stuck when moving and unloading.

[0038] Furthermore, the hydraulic drive device 1 is driven by a linear motion hydraulic cylinder with an adjustable stroke.

[0039] Furthermore, the hydraulic drive device base 21 is connected to the housing 4 by a bolt group.

[0040] The hydraulic rod of the hydraulic drive device 1 is connected to one end of the transmission rod assembly 8 by threads and double-eared retaining washers. The other end of the transmission rod assembly 8 is fixed to the movable unloading plate 2 by bolts.

[0041] Furthermore, proximity switches are provided at the front and rear limit positions of the movable unloading plate 2, and a proximity switch is also provided at the intermediate position between the front and rear limit positions. The proximity switches are connected to the control unit; a sensing plate is provided at the end of the hydraulic rod of the hydraulic drive device 1.

[0042] The working principle of this invention is as follows: When the kiln is in operation, its interior is filled with material for calcination. The gap between the outer edge of the movable discharge plate 2 and the shell 4 serves as the "discharge channel" for the calcined material. During discharge, the linear motion of the hydraulic drive device 1 is transmitted to the movable discharge plate 2 via the rotating rod assembly. At this time, the roller shaft 10 deflects between the upper and lower base plates 11, and the movable discharge plate 2 moves back and forth, thereby causing a relative displacement between the outer edge of the movable discharge plate 2 and the inner side of the shell 4 (the movable discharge plate 2 is in the "middle position" when it is centered, with a stroke of ±75mm). Simultaneously, due to the movement of the movable discharge plate 2, a relative displacement occurs between it and the fixed baffle 3 and the central cone 5 (fixed component). The fixed baffle 3 and the central cone 5 push the material accumulated on the movable discharge plate 2 towards the "discharge channel" around the kiln. Thus, the material falls from the "discharge channel," ultimately completing the discharge.

[0043] like Figure 1 As shown, the adjustable partition unloading platform includes a hydraulic drive device 1, a movable unloading plate 2, a fixed baffle 3, a housing 4, and a central cone 5.

[0044] like Figure 2 As shown, the adjustable partition unloading platform includes a central cone 5, a support beam 6, a roller assembly 7, and a transmission rod assembly 8.

[0045] like Figure 3 As shown, the hydraulic drive device 1 drives the movable unloading plate 2 to reciprocate through the transmission rod assembly 8. The stroke of the hydraulic drive device 1 is ±75mm. Taking the movement of the hydraulic drive device 1 from the front limit position to the rear limit position as an example: when the hydraulic drive device 1 moves from the front limit position to the rear limit position, it drives the movable unloading plate 2 to move to the rear limit position together through the transmission rod assembly 8. At this time, the gap between the movable unloading plate 2 and the housing 4 expands accordingly. This gap is the "unloading channel" for the material. At the same time, due to the movement of the movable unloading plate 2 to the rear limit position, the movable unloading plate 2 also generates relative displacement with the fixed baffle 3 and the central cone 5. The fixed baffle 3 and the central cone 5 together push the material accumulated on the movable unloading plate 2 to the outer edge of the movable unloading plate 2, ultimately forcing the material to slide downward through the "unloading channel" to achieve unloading. In addition, the stroke of the hydraulic drive device 1 is adjustable, so the opening and closing diameter of the "unloading channel" can be steplessly adjusted, thereby realizing stepless control of the unloading amount each time the unloading mechanism moves. In addition, a displacement sensor can be added to the hydraulic drive unit 1 to automatically adjust and detect the stroke of the hydraulic drive unit 1.

[0046] like Figure 4As shown, each kiln chamber is equipped with four sets of hydraulic drive devices 1 and moving unloading plates 2, whose independent movement is controlled by a program. This enables controllable, zoned unloading in areas I-IV (the annular area between the moving unloading plates 2 and the outer shell 4), thereby optimizing the control of calcination in the kiln chamber and improving the quality of the calcined product.

[0047] like Figure 5 and Figure 6 As shown, the roller assembly 7 includes an upper base plate 9, a roller 10, a lower base plate 11, a limiting end plate 12, and a connecting bolt group 13. The upper base plate 9 is welded and fixed to the movable unloading plate 2, and the lower base plate 11 is welded and fixed to the support beam 6. The roller 10 can roll between the upper base plate 9 and the lower base plate 11, thereby realizing the reciprocating motion of the movable unloading plate 2. Furthermore, the outer ends of the upper base plate 9 and the lower base plate 11 have involute contour grooves, and the flange of the limiting end plate 12 is engaged within these grooves, serving a limiting function.

[0048] like Figure 7 As shown, the transmission rod assembly 8 is connected to the movable unloading plate 2 via the connecting flange 15. The transmission rod assembly 8 includes a connecting rod 18, with a first pin 16 and a second pin 19 at each end. The two ends of the connecting rod are connected to the connecting flange 15 of the movable unloading plate and the hydraulic drive device base 21 via the first and second pins, respectively. A first self-lubricating spherical bearing 17 and a second self-lubricating spherical bearing 20 are respectively fitted over the first and second pins, providing lubrication for the first pin 16 and the second pin 19. Since the self-lubricating spherical bearings have a certain amount of play, the angle of the connecting rod 18 can be adaptively adjusted, thus overcoming a certain range of coaxiality errors during the installation of the transmission rod assembly 8 and ensuring that its installation and use requirements are met. The right end of the connecting rod 18 is connected to the hydraulic drive device 1 via a bolt group, and the hydraulic drive device 1 is fixed to the housing 4 via the hydraulic drive device base 21.

[0049] In summary, four independent unloading plates and hydraulic drive devices are provided, enabling unloading of materials from designated areas within the kiln chamber. Unloading points are evenly distributed around the kiln chamber. The unloading volume for each operation can be adjusted by regulating the stroke of the hydraulic cylinder; the unloading speed is nearly uniform. In roller assembly 7, the rollers adopt a rolling cylindrical structure design. As a load-bearing component, they can effectively withstand the movement and impact of the moving unloading plates and materials, ensuring the reliability of the unloading mechanism. Transmission rod assembly 8 uses pin connections for easy assembly and disassembly. A self-lubricating spherical bearing is also provided, possessing a certain degree of self-adaptability, capable of overcoming certain installation accuracy errors, ensuring the coaxiality of the transmission rod assembly mechanism, and demonstrating good practicality.

[0050] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An adjustable zoned unloading platform, characterized by, The shell is provided with a plurality of movable discharge plates and a support beam in the inner cavity of the shell, the plurality of movable discharge plates are arranged on the support beam in the circumferential direction of the shell, a discharge channel is arranged between the outer side of each movable discharge plate and the inner wall of the shell, the movable discharge plate is connected with a driving device, the driving device drives the movable discharge plate to move back and forth, so that the material above the movable discharge plate enters the corresponding discharge channel for discharging; A roller shaft assembly is arranged between the movable discharge plate and the support beam, the roller shaft assembly can be deflected relative to the movable discharge plate and the support beam, and the movable discharge plate moves back and forth on the support beam through the roller shaft assembly; The roller shaft assembly comprises a roller shaft, an upper bottom plate and a lower bottom plate, the upper bottom plate is welded and fixed to the bottom of the movable discharge plate, the lower bottom plate is welded and fixed to the support beam, and the roller shaft is arranged between the upper bottom plate and the lower bottom plate; The end portion of the roller shaft is provided with a limiting end plate, the limiting end plate is connected and fixed to the roller shaft through a bolt assembly, the upper bottom plate and the lower bottom plate are each provided with a involute profile groove, the upper end and the lower end of the limiting end plate are each provided with a flange, the flanges of the upper end and the lower end of the limiting end plate are respectively clamped into the grooves of the upper bottom plate and the lower bottom plate, and the roller shaft can roll between the upper bottom plate and the lower bottom plate, so that the upper bottom plate and the lower bottom plate are relatively moved.

2. The adjustable zoned unloading platform of claim 1, wherein, Each movable discharge plate is separately connected with one driving device, and the driving device is a hydraulic driving device. A transmission rod assembly is connected between the hydraulic driving device and the movable discharge plate.

3. The adjustable zoned unloading platform of claim 1, wherein, The shell is arranged at the bottom of the kiln, a fixed baffle is arranged at the central axis of the kiln, and the fixed baffle is arranged on one side of the movable discharge plate.

4. The adjustable zoned unloading platform of claim 1, wherein, A central cone is arranged on the central axis of the discharge channel in the inner cavity of the shell, and the central cone is arranged on the support beam.

5. The adjustable zoned unloading platform of claim 1, wherein, The axis direction of the roller shaft is perpendicular to the moving direction of the corresponding movable discharge plate.

6. The adjustable zoned unloading platform of claim 1, wherein, The driving device adopts a linear motion hydraulic cylinder, and the stroke of the hydraulic cylinder is adjustable.

7. The adjustable zoned unloading platform of claim 1, wherein, The base of the driving device is connected with the shell through a bolt assembly.

8. The adjustable zoned unloading platform of claim 2, wherein, Proximity switches are arranged at the front and rear limit positions of the movable discharge plate, and a proximity switch is also arranged at the middle position between the front limit position and the rear limit position, the proximity switches are connected with a control unit, and the end of the hydraulic rod of the hydraulic driving device is provided with a sensing plate.

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