An external feeding mechanism of a limestone storehouse

Abstract

The utility model relates to a limestone storehouse discharging technology field especially relates to a kind of outer sending discharging mechanism of limestone storehouse, including bunker, the bottom of bunker is obliquely installed with discharging pipe, array is penetrated in the upper surface of discharging pipe and is formed with the insertion hole, the rod for intercepting stone material is inserted in the insertion hole, and positioning frame is welded on the upper of discharging pipe and above insertion hole, and perpendicular positioning hole opposite with insertion hole is penetrated in the upper of positioning frame, it is used to form the two-point support limit of rod with insertion hole cooperation, and gate assembly for plugging discharging pipe is arranged on the upper surface of discharging pipe and downstream of insertion hole.The utility model is arranged with the insertion hole on the positioning hole of positioning frame and the insertion hole on discharging pipe, and the rod is inserted vertically, forms the two-point support limit structure of stable, to resist the shear force of high-speed flow stone material in inclined pipe, solve the hidden danger that rod is impacted and retreat, swing or pop out.

Description

Technical Field

[0001] This utility model relates to the field of limestone silo discharge technology, and in particular to an external discharge mechanism for limestone silos. Background Technology

[0002] In the cement, thermal power, and metallurgical industries, limestone is a primary raw material, typically stored in large steel silos or concrete silos, and transported to trucks via bottom-mounted discharge mechanisms. Currently, the traditional discharge devices widely used in the industry mainly rely on electric gate valves or electro-hydraulic flat gates to control the flow of material.

[0003] However, limestone particles are hard and have a high density. Under the gravity of a large silo, opening the gate often generates a massive impact flow. On one hand, existing single-point support rod structures (such as simple sleeve-type plates) are prone to "rod retraction" when faced with high-velocity, high-density stone impacts. This means the rod is pushed backward by the impact force, leading to uncontrolled discharge and an inability to effectively regulate the flow rate. On the other hand, when operators attempt to close the gate to stop the discharge, the large amount of stone accumulating in front of the gate exerts enormous compressive and frictional forces on the gate plate. Existing electric actuators often struggle to overcome this instantaneous impact load, causing the gate to fail to close completely, resulting in "jamming" or leakage. This severely affects loading accuracy and can even cause equipment overload and burnout. Utility Model Content

[0004] The purpose of this utility model is to provide an external feeding mechanism for a limestone silo to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an external feeding mechanism for a limestone silo, comprising a silo, a feeding pipe installed at the bottom of the silo at an incline, an array of insertion holes through the upper surface of the feeding pipe, a material bar for intercepting stone material inserted into the insertion holes, a positioning frame welded on the feeding pipe above the insertion holes, a positioning hole through the positioning frame perpendicular to the insertion holes, which is used to cooperate with the insertion holes to form two-point support and limit of the material bar, a gate assembly for sealing the feeding pipe is arranged on the upper surface of the feeding pipe downstream of the insertion holes, and multiple rubber buffer curtains are arranged around the discharge end of the feeding pipe, the multiple rubber buffer curtains together form a buffer feeding enclosure for buffering the impact of falling stone material, and the length of the rubber buffer curtain facing the impact surface of the falling stone material is greater than that of the other side rubber buffer curtains.

[0006] As a further description of the above technical solution: the insertion hole and the positioning hole are arranged along the same perpendicular line, and their axes are perpendicular to the central axis of the feeding tube. The material bar passes through the positioning hole and the insertion hole in sequence and then extends into the inside of the feeding tube to form an interception barrier on the radial cross section of the feeding tube.

[0007] As a further description of the above technical solution: the gate assembly is arranged perpendicular to the central axis of the discharge pipe. The gate assembly includes a gantry frame welded to the top of the discharge pipe. An electric push rod is installed on the top of the gantry frame. The telescopic rod of the electric push rod passes through the gantry frame and is fixed to a gate plate. A slot adapted to the gate plate is opened through the upper surface of the discharge pipe, which is used to cooperate with the gate plate to slide vertically into the discharge pipe for sealing.

[0008] As a further description of the above technical solution: the upper surface of the discharge pipe is provided with three open material windows in sequence along the limestone discharge direction, and the material windows are detachably fastened with splash guards.

[0009] As a further description of the above technical solution: a water supply pipe is provided on the outside of the discharge pipe, and the end of the water supply pipe is forked and respectively arranged on both sides of the rubber buffer curtain, and an atomizing nozzle is installed to spray atomized water to adsorb the dust generated during the discharge process.

[0010] This utility model provides an external feeding mechanism for a limestone silo. It has the following beneficial effects: 1. This utility model forms a stable two-point support and limiting structure by arranging the positioning holes on the positioning frame and the insertion holes on the feeding pipe along the same vertical line, together with the vertically inserted material bar, thereby resisting the shearing force of the high-speed flowing stone material in the inclined pipe and solving the hidden danger of the insertion bar being easily impacted and retreating or swinging.

[0011] 2. This utility model can flexibly adapt to different particle sizes and loading tonnage by adjusting the number and spacing of the inserted material bars, ensuring the accuracy and stability of the material flow adjustment. When shutting off the material flow, the material bars are inserted densely first to greatly reduce the material pressure and impact load in the pipe. After the flow rate is significantly reduced, the electric push rod is driven to close the gate. This staged sealing method greatly reduces the instantaneous impact force on the gate, avoids gate jamming, material leakage or motor overload and burnout, and significantly improves the reliability and service life of the equipment.

[0012] 3. By installing non-uniform length rubber buffer curtains at the end of the discharge pipe, the kinetic energy of falling stones is absorbed, the trajectory of falling stones is changed, and the rigid impact and noise on the carriage are reduced. At the same time, the semi-enclosed space enclosed by the rubber curtains, together with the water mist curtain formed by the atomizing nozzles on both sides, is used to wrap and settle the dust, which prevents stones from splashing and curbs the spread of unorganized dust, thus taking into account both equipment protection and environmental protection requirements.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0014] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the independent upper structure of the material feeding tube of this utility model; Figure 3 This is a cross-sectional view of the internal structure of the upper part of the feeding tube of this utility model; Figure 4 This is a schematic diagram of the independent lower structure of the material feeding tube of this utility model.

[0016] Legend: 1. Hopper; 2. Discharge pipe; 3. Insertion hole; 31. Material bar; 4. Positioning bracket; 5. Positioning hole; 6. Gate assembly; 61. Gate frame; 62. Electric actuator; 63. Gate plate; 71. Material window; 72. Splash guard; 8. Rubber buffer curtain; 91. Water supply pipe; 92. Atomizing nozzle. Detailed Implementation

[0017] 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. Example 1

[0018] Reference Figures 1-4 A material feeding mechanism for a limestone silo includes a silo 1, a feeding pipe 2 installed at an incline at the bottom of the silo 1, and an array of insertion holes 3 extending through the upper surface of the feeding pipe 2. A material rod 31 for intercepting stone is inserted into the insertion holes 3. A positioning frame 4 is welded on the feeding pipe 2 above the insertion holes 3. A positioning hole 5 is provided through the positioning frame 4 and is perpendicular to the insertion holes 3. The positioning frame 4 is used to cooperate with the insertion holes 3 to form a two-point support limit for the material rod 31. A gate assembly 6 for blocking the feeding pipe 2 is arranged on the upper surface of the feeding pipe 2 downstream of the insertion holes 3.

[0019] The insertion hole 3 and the positioning hole 5 are arranged along the same perpendicular line, and their axes are perpendicular to the central axis of the discharge pipe 2. The material bar 31 passes through the positioning hole 5 and the insertion hole 3 in sequence and then extends into the interior of the discharge pipe 2 to form an interception barrier on the radial section of the discharge pipe 2.

[0020] During normal unloading operations, operators can insert multiple material rods 31 at different intervals into the positioning holes 5 of the positioning frame 4 according to the loading flow requirements. These rods then pass downwards through the insertion holes 3 until the bottom of the material rods 31 abuts against the lower wall of the discharge pipe 2, forming a fence-like material-blocking structure inside the pipe. This initially reduces the cross-sectional area of ​​the stone flow inside the discharge pipe 2 and decreases the instantaneous discharge volume. Simultaneously, the insertion depth of the gate plate 63 can be adjusted in conjunction with the gate assembly 6 to form a dual flow-limiting control. Operators can flexibly adapt to different loading tonnages and limestone particle sizes by adjusting the number of material rods 31 inserted and their spacing.

[0021] When a single vehicle finishes loading material and the material flow in the discharge pipe 2 needs to be completely cut off, multiple material rods 31 are densely inserted into the positioning hole 5 and the insertion hole 3 to significantly intercept the stone material in the pipe and reduce the material pressure and impact load inside the pipe. After the stone flow rate in the pipe is significantly reduced, the gate assembly 6 is driven to close completely, effectively solving the problem of the gate not closing tightly, material jamming and leakage, or even failure to seal due to the continuous pushing of the gate plate 63 by a large flow of stone material.

[0022] Specifically, when the material rod 31 is inserted into the positioning hole 5 and the insertion hole 3 in sequence, it is perpendicular to the central axis of the discharge pipe 2. Since the discharge pipe 2 is installed at an angle at the bottom of the hopper 1, after the material rod 31 is inserted at a vertical angle, its rod body is supported by both the positioning frame 4 and the pipe wall of the discharge pipe 2. This structure can effectively resist the shearing force when the stone falls, and prevent the material rod 31 from being impacted and swinging, moving axially or retreating, thereby ensuring the stability of the material discharge adjustment and the reliability of the final sealing operation.

[0023] Specifically, the gate assembly 6 is arranged perpendicular to the central axis of the discharge pipe 2. The gate assembly 6 includes a portal frame 61 welded to the top of the discharge pipe 2. An electric push rod 62 is installed on the top of the portal frame 61. The telescopic rod of the electric push rod 62 passes through the portal frame 61 and is fixedly connected to a gate plate 63. A slot adapted to the gate plate 63 is opened through the upper surface of the discharge pipe 2, which is used to cooperate with the gate plate 63 to slide vertically into the discharge pipe 2 for sealing. When it is necessary to adjust the discharge amount of the discharge pipe 2, the electric push rod 62 is activated. The electric push rod 62 is an electromechanical integrated component that converts the rotational motion of the motor into the linear telescopic motion of the push rod. When the feed is in operation, the built-in motor outputs rotational torque. The output torque is reduced and amplified by the gear reduction mechanism. After deceleration, the screw rotates. The screw rotates but does not move axially. The transmission nut on the screw is constrained by the anti-rotation mechanism and cannot rotate with the screw. The rotation of the screw is converted into the axial linear displacement of the nut, which in turn pushes the telescopic rod of the electric push rod 62 to push the gate plate 63 down the slot on the feed pipe 2 to the specified depth. This, together with the spaced material bars 31, forms a double flow limiting structure. If the feed pipe 2 is to be completely blocked, the electric push rod 62 is activated to fully insert the gate plate 63 into the feed pipe 2 to block it.

[0024] To facilitate real-time monitoring of the stone flow within the pipe and rapid troubleshooting of blockages, three open material windows 71 are sequentially installed on the upper surface of the discharge pipe 2 along the limestone discharge direction. Each material window 71 is detachably fitted with a splash guard 72. The downstreammost material window 71 is permanently open and can be used to monitor the discharge flow rate and flow rate of the discharge pipe 2 in real time. If obstruction or blockage is observed, the operator can quickly open the splash guard 72 on the corresponding material window 71 and manually clear the blockage inside the discharge pipe 2 using tools, without needing to stop the machine or disassemble the pipe. Example 2

[0025] Because the limestone rolls down the inclined discharge pipe 2, it still has considerable kinetic energy when it reaches the discharge end. Directly impacting the truck bed floor can easily cause deformation of the truck bed. Therefore, based on Example 1, and referring to... Figures 1-4 Multiple rubber buffer curtains 8 are arranged around the discharge end of the discharge pipe 2. The multiple rubber buffer curtains 8 together form a buffer discharge enclosure for buffering the impact of falling stones. The length of the rubber buffer curtain 8 facing the impact surface of the falling stones is greater than that of the other side rubber buffer curtains 8. When the stones fall along the discharge pipe 2 to the end, the stones first hit the buffer discharge enclosure formed by the rubber buffer curtains 8. The flexibility and deformation characteristics of the rubber material are used to absorb and buffer the impact force of the stones, forcing the stones to decelerate and change their landing point within the enclosure. This significantly reduces the rigid impact on the floor of the carriage and reduces noise and splashing.

[0026] During the unloading of limestone, the friction and impact between the stones generate a large amount of dust, and the unorganized dust diffusion can easily cause the site to be filled with smoke and dust. Therefore, a water supply pipe 91 is installed on the outside of the discharge pipe 2. The end of the water supply pipe 91 is branched and installed on both sides of the rubber buffer curtain 8, and atomizing nozzles 92 are installed to spray atomized water to absorb the dust generated during the unloading process. At the same time as the unloading operation, clean water is transported through the water supply pipe 91 to the atomizing nozzles 92 and atomized, thereby forming a water mist curtain on the outside of the semi-enclosed space enclosed by the rubber buffer curtain 8. This encapsulates and settles the dust stirred up by the falling stones, effectively suppressing the overflow and diffusion of dust and improving the working environment.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A material delivery mechanism for a limestone silo, comprising a silo (1), characterized in that: The bottom of the silo (1) is inclinedly installed with a discharge pipe (2). The upper surface of the discharge pipe (2) is provided with an array of insertion holes (3). A material rod (31) for intercepting stone is inserted into the insertion hole (3). A positioning frame (4) is welded on the discharge pipe (2) and above the insertion hole (3). A positioning hole (5) is provided on the positioning frame (4) and perpendicular to the insertion hole (3). It is used to cooperate with the insertion hole (3) to form a two-point support limit for the material rod (31). A gate assembly (6) for blocking the discharge pipe (2) is arranged on the upper surface of the discharge pipe (2) and downstream of the insertion hole (3). Multiple rubber buffer curtains (8) are arranged around the discharge end of the discharge pipe (2). The multiple rubber buffer curtains (8) together form a buffer discharge plate for buffering the impact of falling stones. The length of the rubber buffer curtain (8) facing the impact surface of the falling stones is greater than that of the other side rubber buffer curtains (8).

2. The external feeding mechanism for a limestone silo according to claim 1, characterized in that: The insertion hole (3) and the positioning hole (5) are arranged along the same perpendicular line, and their axes are perpendicular to the central axis of the feeding pipe (2). The material bar (31) passes through the positioning hole (5) and the insertion hole (3) in sequence and then extends into the inside of the feeding pipe (2) to form an interception barrier on the radial section of the feeding pipe (2).

3. The external feeding mechanism for a limestone silo according to claim 1, characterized in that: The gate assembly (6) is arranged perpendicular to the central axis of the discharge pipe (2). The gate assembly (6) includes a gantry frame (61) welded to the top of the discharge pipe (2). An electric push rod (62) is installed on the top of the gantry frame (61). The telescopic rod of the electric push rod (62) passes through the gantry frame (61) and is fixed to a gate plate (63). A slot adapted to the gate plate (63) is opened through the upper surface of the discharge pipe (2), which is used to cooperate with the gate plate (63) to slide vertically into the discharge pipe (2) for sealing.

4. The external feeding mechanism for a limestone silo according to claim 1, characterized in that: The upper surface of the discharge pipe (2) is provided with three open material windows (71) in sequence along the limestone discharge direction, and the material windows (71) are detachably fastened with splash guards (72).

5. The external feeding mechanism for a limestone silo according to claim 1, characterized in that: The material discharge pipe (2) is provided with a water supply pipe (91) on the outside. The end of the water supply pipe (91) is branched and arranged on both sides of the rubber buffer curtain (8), and is equipped with an atomizing nozzle (92) for spraying atomized water to adsorb the dust generated during the material discharge process.

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