Mineral powder conveying device for concrete

Abstract

The mineral powder conveying device for the concrete comprises a box body, a bottom plate capable of moving up and down is arranged in the box body, a discharging hole is formed in the middle of the bottom plate, a sealing cover is arranged at an opening in the top of the discharging hole, a connecting pipe extending downwards is arranged at an opening in the bottom of the discharging hole, and the bottom of the connecting pipe is provided with a screw. A top pipe in butt joint with the connecting pipe is arranged below the discharging hole, the top pipe can push the sealing cover to move upwards to open the discharging hole, a plurality of air holes which incline downwards and can discharge air towards the inner side of the top pipe are formed in the side wall of the top pipe, the upper end of the top pipe is communicated with the connecting pipe, and the lower end of the top pipe is communicated with a discharging hole in the bottom face of the box body. The discharging device has the advantages of being capable of effectively avoiding blocking during discharging, improving discharging efficiency, reducing cleaning cost and the like.

Description

Technical Field

[0001] This utility model relates to a conveying device, specifically a conveying device for conveying mineral powder for concrete. Background Technology

[0002] Concrete is one of the most important civil engineering materials in modern times. It is an artificial stone material made by mixing cementitious materials, aggregates, water, and, when necessary, admixtures and additives, through uniform mixing, compaction, and curing. Existing concrete usually incorporates mineral powder materials during mixing.

[0003] During the processing of mineral powder, the ore is generally crushed into mineral powder by a high-pressure grinding roller mill. The mineral powder is then transported to a mineral powder silo by a Roots blower. Chinese patent application CN217837603U discloses a mineral powder conveying device for concrete, which includes a high-pressure grinding roller mill, a Roots blower, and a mineral powder silo. The Roots blower is located on one side of the high-pressure grinding roller mill, and the high-pressure grinding roller mill and the Roots blower are connected through a feed pipe. The mineral powder silo is located on the side of the Roots blower away from the high-pressure grinding roller mill, and the mineral powder silo is connected to the Roots blower through a discharge pipe. Two sets of fixed pipes are symmetrically connected to the top of the mineral powder silo. A spring is connected to the bottom of the fixed pipe, and a fixed rod is connected to the other end of the spring. The lower ends of the two sets of fixed rods penetrate the top of the mineral powder silo and extend downward, and are connected to a moving plate.

[0004] During unloading, the discharge pipe connected to the lower end of the base plate may accumulate and clump inside due to the stickiness and particulate nature of the mineral powder, leading to blockage. This blockage is particularly severe when the mineral powder is damp or contains impurities, affecting smooth unloading and increasing cleaning and maintenance costs. Utility Model Content

[0005] The purpose of this utility model is to provide a concrete mineral powder conveying device that solves the problems of easy blockage during unloading, increased unloading difficulty and cleaning costs in the existing technology.

[0006] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a concrete mineral powder conveying device, including a box body, a bottom plate that can move up and down inside the box body, a discharge hole in the middle of the bottom plate, a cover at the top opening of the discharge hole, a connecting pipe extending downward at the bottom opening of the discharge hole, a top pipe connected to the connecting pipe below the discharge hole, the top pipe can push the cover upward to open the discharge hole, a plurality of downward inclined air holes on the side wall of the top pipe that can vent air towards the inside of the top pipe, the upper end of the top pipe is connected to the connecting pipe, and the lower end of the top pipe is connected to the discharge hole on the bottom surface of the box body.

[0007] As a further preferred technical solution of this utility model; the outer wall of the top pipe abuts against the inner wall of the connecting pipe, the bottom surface of the cover is provided with a plurality of top rods that pass downward through the side wall of the discharge hole, the outer wall of the top pipe is provided with an annular protrusion, and the end of the top rod passes through the side wall of the discharge hole and abuts against the upper end face of the annular protrusion.

[0008] As a further preferred technical solution of this utility model, the end of the push rod is provided with an annular limiting part, and the annular limiting part is provided with a return spring that abuts against the connecting pipe and is sleeved on the periphery of the push rod.

[0009] As a further preferred technical solution of this utility model; when the upper edge of the top tube is located inside the connecting tube, the annular limiting part at the end of the top rod contacts the upper end surface of the annular protrusion.

[0010] As a further preferred technical solution of this utility model; the annular protrusion is provided with a ventilation chamber communicating with the air hole, and an air pump connected to the bottom of the box is provided below the bottom plate, and the air outlet of the air pump is connected to the ventilation chamber through an air pipe.

[0011] As a further preferred technical solution of this utility model, the top surface of the bottom plate slopes downward from the edge toward the discharge hole to form a concave surface, and a contact surface that fits with the bottom surface of the cover is formed between the inner edge of the concave surface and the edge of the discharge hole.

[0012] Therefore, this utility model has the advantages of effectively avoiding blockage during unloading, improving unloading efficiency, and reducing cleaning costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 yes Figure 1 Structural sectional view;

[0015] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the diagram;

[0016] Figure 4 yes Figure 1 A schematic diagram of the base plate. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0018] like Figure 1-4As shown, a concrete mineral powder conveying device includes a housing 1, inside which is a vertically movable bottom plate 11. A top plate is provided above the bottom plate. When the bottom plate moves downward due to the mass of the mineral powder, the top plate moves downward accordingly, and a sealing plate on the side wall of the top plate seals the mineral powder conveying hole provided on the side wall of the housing, preventing the mineral powder from flowing back from the housing through the conveying hole. A discharge hole 111 is provided in the middle of the bottom plate 11 to provide a channel for the discharge of mineral powder. A cover 2 is provided at the top opening of the discharge hole 111 to close the discharge hole 111, preventing leakage of mineral powder in the non-discharging state, and opening it in the discharging state for mineral powder discharge. A connecting pipe 12 extending downwards is connected to the bottom opening of the discharge hole 111. The connecting pipe 12 is connected to the top pipe to ensure that the mineral powder can smoothly enter the top pipe 3 for discharge through the connecting pipe. The top surface of the bottom plate 11 slopes downwards from the edge toward the discharge hole 111 to form a concave surface 112. A contact surface 113 that fits against the bottom surface of the cover 2 is formed between the inner edge of the concave surface 112 and the edge of the discharge hole 111. The concave surface can reverse the flow of mineral powder accumulated on the top surface of the bottom plate, so that the mineral powder automatically flows toward the discharge hole, improving the discharge efficiency of the mineral powder. The contact surface ensures that the cover fits and fully contacts the contact surface, ensuring the sealing quality of the cover for the discharge hole.

[0019] Under normal conditions, the connecting pipe and the jacking pipe are separated. When the bottom plate moves down until the connecting pipe contacts the jacking pipe, the jacking pipe pushes the sealing cover 2 upward, thereby opening the discharge hole 111 and allowing the mineral powder to be discharged from the box 1, making the discharge faster and more efficient. At the same time, multiple downward-sloping air holes 31 are provided on the side wall of the jacking pipe 3. These air holes 31 can blow air into the inside of the jacking pipe 3, forming a negative pressure, thereby driving the mineral powder to flow quickly, improving the discharge efficiency of the mineral powder, and effectively preventing the mineral powder from clogging, ensuring that the mineral powder can be discharged from the box 1 efficiently and smoothly. The upper end of the jacking pipe 3 is connected to the connecting pipe 12, ensuring that the mineral powder can smoothly enter the jacking pipe 3, while its lower end is connected to the discharge hole 13 at the bottom of the box 1. The mineral powder is finally discharged from the discharge hole 13, completing the entire conveying process.

[0020] like Figure 2-4As shown, when the base plate moves down to its position, the outer wall of the jacking pipe 3 abuts against the inner wall of the connecting pipe 12, forming a discharge channel. The bottom surface of the cover 2 is provided with multiple push rods 21 that pass downwards through the side wall of the discharge hole 111. The push rods are installed on the side wall of the discharge hole and can move up and down. The outer wall of the jacking pipe 3 is provided with an annular protrusion 32. The end of the push rod 21 passes through the side wall of the discharge hole 111 and abuts against the upper end face of the annular protrusion 32. When the base plate moves down, the cover and push rods move down accordingly until the push rods contact the annular protrusion. As the base plate continues to move down, the push rods are pushed up relative to the base plate by the annular protrusion, causing the cover to move up and open the discharge hole. At this time, the connecting pipe is connected to the jacking pipe, and the mineral powder can be discharged from the discharge hole. When the upper edge of the jacking pipe is initially located inside the connecting pipe and connected to it, the push rods are close to the upper end face of the annular protrusion, and the push rods are stationary. As the base plate continues to move, the annular protrusion pushes the push rods, thus... The cap opens the discharge hole, while the jacking pipe continues to extend into the connecting pipe. The end of the jacking rod 21 is provided with an annular limiting part 211. The annular limiting part 211 is provided with a return spring 22 that abuts against the connecting pipe 12 and is sleeved around the jacking rod 21. When the upper edge of the jacking pipe 3 is inside the connecting pipe 12, the annular limiting part 211 at the end of the jacking rod 21 is close to the upper end face of the annular protrusion 32. The end of the jacking rod abuts against the upper end face of the annular protrusion through the annular limiting part. When the jacking pipe is inside the connecting pipe and the bottom plate continues to move downward, the jacking rod is limited by the annular protrusion and moves upward relative to the bottom plate. The return spring contracts, thereby causing the cap to leave the top surface of the bottom plate and then opening the discharge hole. The mineral powder enters the connecting pipe and the jacking pipe sequentially from the discharge hole and is finally discharged from the box. When the bottom plate returns to its original position, the jacking rod automatically moves back under the action of the return spring and the annular limiting part, causing the cap to automatically close the opening of the discharge hole.

[0021] like Figure 2-3 As shown, the annular protrusion 32 is provided with a ventilation chamber 321 that communicates with the air hole 31. The bottom plate 11 is provided with an air pump 14 that is connected to the bottom of the box 1. The air outlet of the air pump 14 is connected to the ventilation chamber 321 through an air pipe 141. The ventilation chamber is located inside the annular protrusion, connecting all the air holes. The air pump fills the ventilation chamber with gas through the air pipe, and the gas flows through the ventilation chamber toward each air hole and flows along the inclined angle of the air hole to the inside of the top pipe, forming a negative pressure structure. This allows the mineral powder to enter the connecting pipe and be accelerated by the airflow to be discharged from the box through the top pipe, improving the unloading efficiency of the mineral powder and preventing the mineral powder from clogging the unloading hole, connecting pipe and top pipe.

[0022] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A concrete powder conveying device, comprising a housing (1), wherein the housing (1) is provided with a vertically movable bottom plate (11), characterized in that: The bottom plate (11) is provided with a discharge hole (111) in the middle. The top opening of the discharge hole (111) is provided with a cover (2). The bottom opening of the discharge hole (111) is provided with a downward extending connecting pipe (12). The discharge hole (111) is provided with a top pipe (3) below it that connects with the connecting pipe (12). The top pipe (3) can push the cover (2) to move upward to open the discharge hole (111). The side wall of the top pipe (3) is provided with multiple downward inclined air holes (31) that can vent air towards the inside of the top pipe (3). The upper end of the top pipe (3) is connected to the connecting pipe (12). The lower end of the top pipe (3) is connected to the discharge hole (13) on the bottom surface of the box (1).

2. The concrete powder conveying device according to claim 1, characterized in that: The outer wall of the top pipe (3) abuts against the inner wall of the connecting pipe (12). The bottom surface of the cover (2) is provided with multiple top rods (21) that pass downward through the side wall of the discharge hole (111). The outer wall of the top pipe (3) is provided with an annular protrusion (32). The end of the top rod (21) passes through the side wall of the discharge hole (111) and abuts against the upper end face of the annular protrusion (32).

3. The concrete powder conveying device according to claim 2, characterized in that: The top rod (21) has an annular limiting part (211) at its end, and a return spring (22) is provided on the annular limiting part (211) to abut against the connecting pipe (12) and sleeved on the periphery of the top rod (21).

4. The concrete powder conveying device according to claim 3, characterized in that: When the upper edge of the top pipe (3) is located inside the connecting pipe (12), the annular limiting part (211) at the end of the top rod (21) is close to the upper surface of the annular protrusion (32).

5. The concrete powder conveying device according to claim 2, characterized in that: The annular protrusion (32) is provided with a ventilation chamber (321) communicating with the air hole (31). The bottom plate (11) is provided with an air pump (14) connected to the bottom of the box (1). The air outlet of the air pump (14) is connected to the ventilation chamber (321) through an air pipe (141).

6. The concrete powder conveying device according to claim 1, characterized in that: The top surface of the bottom plate (11) slopes downward from the edge toward the discharge hole (111) to form a concave surface (112), and a contact surface (113) that fits against the bottom surface of the cover (2) is formed between the inner edge of the concave surface (112) and the edge of the discharge hole (111).

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