Cement admixture additive powder metering and conveying system

Abstract

The utility model discloses a cement admixture adds powder material metering conveying system, including sand and stone proportioning system, feeding belt conveyor, storage tank, loose mechanism, spiral conveying system, proportioning mixing mechanism, sand and stone proportioning system one side is installed with feeding belt conveyor, and the feeding belt conveyor discharge end is equipped with main stirring system, and the storage tank is equipped with several groups, and several groups storage tank are equipped with cement, fly ash, slag powder, silica ash and the like powder material respectively, and the storage tank bottom end is installed with loose mechanism, and the proportioning mixing mechanism is equipped with two groups, and the storage tank with cement is connected with one group proportioning mixing mechanism alone through spiral conveying system, and the storage tank with fly ash, slag powder, silica ash and the like powder material is connected with another group proportioning mixing mechanism, and two group proportioning mixing mechanisms all are connected with main stirring system through spiral conveying system. The utility model has realized to the cemented powder material in storage tank quick loose, has guaranteed subsequent measurement accurate and conveying stable.

Description

Technical Field

[0001] This utility model belongs to the field of construction engineering technology, and specifically relates to a cement admixture powder metering and conveying system. Background Technology

[0002] In the production process of cement slurry, UHPC and other mixtures for construction engineering, the storage and stable transportation of powder are the key links to ensure production continuity and finished product quality. Although most existing production systems have achieved automated operations in batching, mixing and other processes, they generally lack targeted loosening devices for powder when it is transferred from storage tanks to the conveying system. Powder that has been stored in the storage tank for a long time is prone to caking due to humidity. The caking powder will stick and pile up on the inner wall of the tank and near the discharge port, forming phenomena such as "rat holes" and "bridging". This directly causes the powder to be unable to fall smoothly into the conveying system, resulting in interruption of material supply and a significant decrease in conveying efficiency.

[0003] Rat hole: Powder flows only along the vertical channel in the center of the tank, while a large amount of powder stagnates on both sides of the tank wall and cannot enter the conveying process, resulting in powder waste and reduced feeding efficiency;

[0004] Bridging: When powder accumulates in the tank, the clumps of powder form a stable arched "bridge" at the discharge port, preventing the powder below from falling and the powder above from entering the conveying process normally;

[0005] A search revealed an existing technology announcement (CN222096553U) for an automatic cement slurry mixing system for construction. The system includes a mixing drum equipped with a mixing impeller and a mixing motor. The mixing drum is placed on an electronic weighing scale. A cement conveying motor at the bottom of the cement silo delivers cement into the mixing drum via a cement conveying pipe. A water pump draws water from a storage tank into the mixing drum. An admixture conveying motor at the bottom of the admixture tank delivers admixture into the mixing drum via an admixture conveying pipe. The cement conveying motor, water pump, admixture conveying motor, mixing motor, electronic weighing scale, and electric discharge valve are electrically connected to a controller. The controller automatically controls the addition of water, cement, and admixtures to the mixing drum and controls the mixing time. After the mixing time is reached, the electric discharge valve opens to discharge the cement slurry from the mixing drum into a storage tank. After the electronic weighing scale returns to its starting point, the mixing motor stops, the electric discharge valve closes, and the controller enters the next cycle.

[0006] Further search revealed that, according to prior art announcement number CN118342658A, a UHPC production line and production method based on premixed paste technology includes two mixing plants. Each mixing plant includes an aggregate batching system, an inclined belt conveyor, a powder storage and conveying system, a powder metering and premixed paste system, a main mixer, a water and admixture system, a steel fiber conveying and metering system, an aggregate storage hopper, a main mixing chassis, a premixing chassis, and a control room. The two mixing plants share a main hopper. The discharge end of the aggregate batching system overlaps with the inlet end of the inclined belt conveyor. The main mixing chassis and the premixing chassis are mounted on a support frame.

[0007] The existing technologies described above lack a loosening device to loosen the powder before it enters the conveying system from the storage tank. The powder is very prone to absorbing moisture and clumping. When the powder accumulates in the tank, the clumped powder is prone to forming "bridging" and "rat holes" in the storage tank, which directly causes the powder to be unable to fall smoothly into the conveying system, resulting in problems such as interruption of material supply and a significant decrease in conveying efficiency. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a cement admixture powder metering and conveying system. Through a clearing mechanism, the system can quickly loosen the caking powder in the storage tank, avoid material supply interruption, ensure accurate subsequent metering and stable conveying, and improve the reliability of system operation.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A cement admixture powder metering and conveying system includes a sand and gravel proportioning system, a feeding belt conveyor, storage tanks, a loosening mechanism, a screw conveyor system, and a proportioning and mixing mechanism. The sand and gravel proportioning system has a feeding belt conveyor installed on one side, with a main mixing system at the discharge end of the feeding belt conveyor. The storage tanks are arranged in several groups, each containing powders such as cement, fly ash, slag powder, and silica fume. A loosening mechanism is installed at the bottom of each storage tank. The proportioning and mixing mechanism consists of two groups: a storage tank containing cement is connected to one group of proportioning and mixing mechanisms via a screw conveyor system, while storage tanks containing fly ash, slag powder, and silica fume are connected to the other group of proportioning and mixing mechanisms. Both groups of proportioning and mixing mechanisms are connected to the main mixing system via the screw conveyor system.

[0011] The main mixing system is equipped with a discharge port at the bottom;

[0012] The storage tank and the mixing mechanism are both equipped with fixing plates at the bottom, which are used to fix the spiral conveying system at the bottom of the storage tank and the mixing mechanism.

[0013] The loosening mechanism is fixedly connected to the storage tank via bolts and nuts. The loosening mechanism includes a connecting hose I, a tapered tube, a connecting hose II, a vibration motor, a tapered seat, and a motor I. Both ends of the connecting hose I are equipped with flanges, and the connecting hose I is fixedly connected to the flanges. The top flange of the connecting hose I is fixedly connected to the storage tank via bolts and nuts. The bottom flange of the connecting hose I is fixedly connected to the tapered tube via bolts and nuts. The bottom of the tapered tube is fixedly connected to the connecting hose II. The connecting hose II is fixedly connected to the screw conveyor system. Several sets of springs are provided on both sides of the connecting hose I. Gaskets are welded to both ends of the springs. The top gaskets of the springs are fitted into the bolts connecting the top flange of the connecting hose I and the storage tank, and the bottom gaskets of the springs are fitted into the bottom flange of the connecting hose I and the connecting tapered tube. Inside the bolt, a spring is responsible for cooperating with the vibration motor to transmit vibration energy to the storage tank outlet, connecting hose I, and conical tube, amplifying the vibration amplitude to break up powder clumps. A connecting frame is provided on the side wall of the conical tube, and a vibration motor is installed on the connecting frame. A protective shell is provided on the outside of the vibration motor. A fixed frame I is provided inside the conical tube. A conical seat is located at the top of the fixed frame I and is rotatably connected to the fixed frame I. The bottom of the conical seat passes through the fixed frame I and is provided with a bevel gear. The motor I is installed on the outside of the conical tube. A protective shell is provided on the outside of the motor I. The output shaft of the motor I is connected to a rotating shaft through a coupling. The rotating shaft passes through the side wall of the conical tube and is provided with a bevel gear. One end of the rotating shaft bevel gear meshes with the bottom bevel gear of the conical seat. A protective shell is provided at the meshing point between the rotating shaft bevel gear and the bottom bevel gear of the conical seat.

[0014] The pointed end of the tapered tube is located inside the storage tank. A fixing ring is provided on the tapered tube, and several sets of loosening plates are provided on the fixing ring. The loosening plates are fixedly connected to the fixing ring by bolts and nuts.

[0015] The mixing mechanism includes a mixing chamber, a stirring frame, spiral blades, motor II, and motor III. A spiral conveying system at the bottom of the storage tank connects to the mixing chamber. A mixing tank is located at the bottom of the mixing chamber. Two sets of fixed frames II are installed inside the mixing tank, respectively fixedly connected to the top and bottom of the mixing tank. The stirring frame is rotatably mounted between the two sets of fixed frames II. The top of the stirring frame passes through the fixed frames II and is equipped with a bevel gear. Motor II is mounted on the outer wall of the mixing tank. A protective shell is provided on the outside of motor II. The output shaft of motor II is connected to a rotating shaft via a coupling. The rotating shaft passes through the side wall of the mixing tank and is equipped with a bevel gear. One end of the rotating shaft's bevel gear meshes with the top bevel gear of the stirring frame. The mixing tank has a protective shell at the meshing point between the bevel gear at one end of the rotating shaft and the top bevel gear of the mixing frame. The mixing frame has a mixing cylinder in the middle, with through holes on both the upper and lower side walls. The spiral blades are rotatably installed inside the mixing cylinder, with the bottom end of the spiral blades passing through the mixing cylinder and the fixed frame II and having a bevel gear. The motor III is installed on the outer wall of the mixing tank, with a protective shell on the outside of the motor III. The output shaft of the motor III is connected to the rotating shaft via a coupling. The rotating shaft passes through the side wall of the mixing tank and has a bevel gear. The bevel gear at one end of the rotating shaft meshes with the bottom bevel gear of the spiral blade, and a protective shell is provided at the meshing point between the bevel gear at one end of the rotating shaft and the bottom bevel gear of the spiral blade. The mixing frame has several sets of mixing plates.

[0016] The advantages of this utility model compared with the prior art are as follows:

[0017] 1) The vibration of the vibrating motor causes the connecting hose I, the connecting hose I, and the conical tube to shake at the same frequency. The conical seat shakes at the bottom of the storage tank to break up the clumps of powder inside the tank, avoiding the "bridging" phenomenon. The motor I drives the rotating shaft to rotate, which drives the conical seat to rotate at high speed on the fixed frame I. The loosening plate rotates synchronously with the conical seat, breaking up the clumps of powder adhering to the inner wall of the storage tank, avoiding the "rat hole" phenomenon, and generating a pushing force on the surrounding powder, guiding the powder towards the feed inlet of the conical tube, so that the powder continues to loosen and falls smoothly into the conical tube, ensuring the stability of subsequent metering and conveying.

[0018] 2) Motor II drives the mixing frame to rotate, and the mixing plates on the mixing frame rotate synchronously to radially stir the powder in the mixing tank, initially breaking up the powder clumps. Motor III drives the spiral blades to rotate at high speed, pushing the powder at the bottom of the mixing tank upwards, and then scattering it through the through holes at both ends of the mixing cylinder, forming a convective mixture with the powder stirred by the mixing plates, so that different powders are quickly and evenly mixed in the mixing tank; ensuring that the powder is evenly mixed in a short time, ensuring the stability of the subsequent mixture performance, while reducing mixing time and energy consumption, and improving overall production efficiency. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of a cement admixture powder metering and conveying system according to the present invention;

[0020] Appendix Figure 2 It is attached Figure 1 Schematic diagram of the location of the medium sand and gravel mix design system;

[0021] Appendix Figure 3 This is an appendix Figure 1 Schematic diagram of the connection between the storage tank and the proportioning and mixing mechanism Figure 1 ;

[0022] Appendix Figure 4 This is an appendix Figure 1 Schematic diagram of the connection between the storage tank and the proportioning and mixing mechanism Figure 2 ;

[0023] Appendix Figure 5 This is an appendix Figure 4 Schematic diagram of the location of the loosening mechanism;

[0024] Appendix Figure 6 This is an appendix Figure 4 Schematic diagram of a loosely structured mechanism Figure 1 ;

[0025] Appendix Figure 7 This is an appendix Figure 6 Schematic diagram of the spring structure;

[0026] Appendix Figure 8 This is an appendix Figure 4 Schematic diagram of a loosely structured mechanism Figure 2 ;

[0027] Appendix Figure 9 This is an appendix Figure 1 Schematic diagram of medium-ratio mixing mechanism Figure 1 ;

[0028] Appendix Figure 10 This is an appendix Figure 1 Schematic diagram of medium-ratio mixing mechanism Figure 2 ;

[0029] In the diagram: 1. Sand and gravel proportioning system; 2. Feeding belt conveyor; 3. Storage tank; 31. Loosening mechanism; 3101. Connecting hose I; 3102. Conical tube; 3103. Connecting hose II; 3104. Spring; 3105. Connecting frame; 3106. Vibration motor; 3107. Fixing frame I; 3108. Conical seat; 3110. Motor I; 3111. Fixing ring; 3112. Loosening plate; 32. Fixing plate; 4. Screw conveyor system; 5. Main mixing system; 51. Discharge port; 6. Proportioning and mixing mechanism; 61. Mixing tank; 62. Proportioning bin; 63. Fixing frame II; 64. Mixing frame; 65. Mixing cylinder; 66. Mixing plate; 67. Spiral blades; 68. Motor II; 69. Motor III. Detailed Implementation

[0030] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-10 The technical solution of this utility model will be further described in detail below.

[0031] A cement admixture powder metering and conveying system includes a sand and gravel proportioning system 1, a feeding belt conveyor 2, a storage tank 3, a loosening mechanism 31, a screw conveyor system 4, and a proportioning and mixing mechanism 6. The sand and gravel proportioning system 1 is equipped with a feeding belt conveyor 2 on one side, and a main mixing system 5 is provided at the discharge end of the feeding belt conveyor 2. The storage tank 3 is provided in several groups, and the several groups of storage tanks 3 are respectively filled with cement, fly ash, slag powder, silica fume and other powders. A loosening mechanism 31 is installed at the bottom of the storage tank 3. The proportioning and mixing mechanism 6 is provided in two groups. The storage tank 3 containing cement is connected to one proportioning and mixing mechanism 6 separately through the screw conveyor system 4. The storage tank 3 containing fly ash, slag powder, silica fume and other powders is connected to the other proportioning and mixing mechanism 6 together. Both proportioning and mixing mechanisms 6 are connected to the main mixing system 5 through the screw conveyor system 4.

[0032] The main stirring system 5 is provided with a discharge port 51 at the bottom;

[0033] The storage tank 3 and the mixing mechanism are both equipped with fixing plates 32 at the bottom, which are used to fix the spiral conveying system 4 at the bottom of the storage tank 3 and the mixing mechanism.

[0034] As described above, aggregates of different particle sizes are mixed in a preset ratio by the sand and gravel proportioning system 1 and then conveyed to the main mixing system 5 by the feeding belt conveyor 2 to wait for mixing. Multiple storage tanks 3 store different powders such as cement and fly ash. The loosening mechanism 31 loosens the powder in the storage tanks to avoid phenomena such as "bridging" and "rat holes" and ensures that the powder falls smoothly. Cement, as the core cementitious powder, needs to be weighed and proportioned separately. The cement is conveyed to the first proportioning and mixing mechanism 6 through a dedicated screw conveyor system 4 to complete accurate metering. The admixture powders such as fly ash and slag powder are simultaneously collected to the second proportioning and mixing mechanism 6, and mixed after co-metering. The powders after metering and mixing from both sources are simultaneously sent to the main mixing system 5 to be fully mixed with the pretreated sand and gravel and the preset proportion of water.

[0035] The loosening mechanism 31 is fixedly connected to the storage tank 3 by bolts and nuts. The loosening mechanism 31 includes a connecting hose I 3101, a tapered tube 3102, a connecting hose II 3103, a vibration motor 3106, a tapered seat 3108, and a motor I 3110. Both ends of the connecting hose I 3101 are provided with flanges, and the connecting hose I 3101 is fixedly connected to the flanges. The top flange of the connecting hose I 3101 is fixedly connected to the storage tank 3 by bolts and nuts, and the bottom flange of the connecting hose I 3101 is fixedly connected to the storage tank 3 by bolts and nuts. A fixed connecting tapered tube 3102 is provided, with its bottom fixedly connected to a connecting hose II 3103. The connecting hose II 3103 is fixedly connected to the screw conveyor system 4. Several sets of springs 3104 are provided on both sides of the connecting hose I 3101. Gaskets are welded to both ends of the springs 3104. The top gasket of the spring 3104 is fitted into the top flange of the connecting hose I 3101 and the bolts connecting the storage tank 3. The bottom gasket of the spring 3104 is fitted into the bottom flange of the connecting hose I 3101 and the connecting tapered tube 3102. Inside the bolt 02, the spring 3104 works with the vibration motor 3106 to transmit vibration energy to the discharge port of the storage tank 3, the connecting hose I 3101, and the conical tube 3102, amplifying the vibration amplitude to break up powder clumps. A connecting frame 3105 is provided on the side wall of the conical tube 3102, and the vibration motor 3106 is mounted on the connecting frame 3105. A protective shell is provided on the outside of the vibration motor 3106. A fixing frame I 3107 is provided inside the conical tube 3102, and a conical seat 3108 is located at the top of the fixing frame I 3107. The fixed frame I 3107 is rotatably connected. The bottom of the conical seat 3108 passes through the fixed frame I 3107 and is provided with a bevel gear. The motor I 3110 is installed on the outside of the conical tube 3102. The outside of the motor I 3110 is provided with a protective shell. The output shaft of the motor I 3110 is connected to the rotating shaft through a coupling. The rotating shaft passes through the side wall of the conical tube 3102 and is provided with a bevel gear. One end of the rotating shaft bevel gear meshes with the bottom bevel gear of the conical seat 3108. A protective shell is provided at the meshing point between the one end of the rotating shaft bevel gear and the bottom bevel gear of the conical seat 3108.

[0036] The pointed end of the tapered tube 3102 is located inside the storage tank 3. A fixing ring 3111 is provided on the tapered tube 3102. Several sets of loosening plates 3112 are provided on the fixing ring 3111. The loosening plates 3112 are fixedly connected to the fixing ring 3111 by bolts and nuts.

[0037] As described above, during operation, the vibration motor 3106 starts to vibrate, causing the connecting hose I 3101, the connecting hose I 3101, and the conical tube 3102 to sway at the same frequency. With the elastic support of the spring 3104, the vibration effect is amplified. The conical seat 3108 shakes at the bottom of the storage tank 3, breaking up the clumps of powder inside the tank and preventing the "bridging" phenomenon. At the same time, the motor I 3110 drives the rotating shaft to rotate, causing the conical seat 3108 to rotate at high speed on the fixed frame I 3107. The loosening plate 3112 rotates synchronously with the conical seat 3108, breaking up the clumps of powder adhering to the inner wall of the storage tank 3, preventing the "rat hole" phenomenon, and generating a pushing force on the surrounding powder, guiding the powder towards the feed inlet of the conical tube 3102, so that the powder continues to loosen and falls smoothly into the conical tube 3102, and then is transported to the screw conveyor system 4 through the connecting hose II 3103, ensuring the stability of subsequent metering and conveying.

[0038] The mixing mechanism 6 includes a mixing chamber 62, a stirring frame 64, a spiral blade 67, a motor II 68, and a motor III 69. The spiral conveying system 4 at the bottom of the storage tank 3 connects to the mixing chamber 62. A mixing tank 61 is located at the bottom of the mixing chamber 62. Two sets of fixing frames II 63 are installed inside the mixing tank 61, respectively fixedly connected to the top and bottom ends of the mixing tank 61. The stirring frame 64 is rotatably mounted between the two sets of fixing frames II 63. The top of the stirring frame 64 passes through the fixing frames II 63 and is equipped with a bevel gear. The motor II 68 is mounted on the outer wall of the mixing tank 61. A protective shell is provided on the outside of the motor II 68. The output shaft of the motor II 68 is connected to a rotating shaft via a coupling. The rotating shaft passes through the side wall of the mixing tank 61 and is equipped with a bevel gear. One end of the rotating shaft has a bevel gear that connects to the top of the stirring frame 64. The mixing frame 64 has a mixing cylinder 65 in the middle, with through holes on both the upper and lower side walls. The spiral blade 67 is rotatably installed inside the mixing cylinder 65. The bottom end of the spiral blade 67 passes through the mixing cylinder 65 and is connected to the fixing frame II 63 with a bevel gear. The motor III 69 is installed on the outer wall of the mixing tank 61. The motor III 69 is provided with a protective shell on its outer side. The output shaft of the motor III 69 is connected to the rotating shaft through a coupling. The rotating shaft passes through the side wall of the mixing tank 61 and is provided with a bevel gear. The bevel gear at one end of the rotating shaft meshes with the bottom bevel gear of the spiral blade 67. The bevel gear at one end of the rotating shaft meshes with the bottom bevel gear of the spiral blade 67 with a protective shell. The mixing frame 64 has several sets of stirring plates 66.

[0039] As described above, motor II 68 drives the stirring frame 64 to rotate, and the stirring plate 66 on the stirring frame 64 rotates synchronously to radially stir the powder in the mixing tank 61, initially breaking up the powder clumps. Motor III 69 drives the spiral blade 67 to rotate at high speed, pushing the powder at the bottom of the mixing tank 61 upwards, and then scattering it through the through holes at both ends of the mixing cylinder 65, forming a convective mixture with the powder stirred by the stirring plate 66, so that different powders are quickly and evenly mixed in the mixing tank 61, providing uniform raw materials for the subsequent mixing process of the main stirring system 5.

[0040] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting; movable connection methods include, but are not limited to, sliding connection, rotating connection and threaded connection. The connection method to achieve the desired effect should be selected according to the application of the solution.

[0042] In summary, the power systems, including but not limited to motors, vibration motors, and their respective transmission systems, are equipped with protective covers adapted to the actual installation location, and sealing rings are adapted to the relative rotational connections to prevent external environmental factors from causing wear or damage to the power and transmission systems, thereby further ensuring the normal operation of the power and transmission systems.

[0043] In summary, the electronic or electrical components, including but not limited to motors and vibration motors, are existing components that are custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art and are not within the scope of protection of this invention.

[0044] The above description is merely an example and illustration of the structure created by this invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of this invention.

Claims

1. A cement admixture powder metering and conveying system, comprising a sand and gravel proportioning system, a feeding belt conveyor, a storage tank, a loosening mechanism, a screw conveyor system, and a proportioning and mixing mechanism; the sand and gravel proportioning system is equipped with a feeding belt conveyor on one side, and a main mixing system is provided at the discharge end of the feeding belt conveyor; the storage tank is provided with several sets, and a loosening mechanism is installed at the bottom of the storage tank; the proportioning and mixing mechanism is provided with two sets, and both sets of proportioning and mixing mechanisms are connected to the main mixing system through the screw conveyor system; Its features The loosening mechanism is fixedly connected to the storage tank via bolts and nuts. The loosening mechanism includes a connecting hose I, a tapered tube, a connecting hose II, a vibration motor, a tapered seat, and a motor I. Both ends of the connecting hose I are equipped with flanges, and the connecting hose I is fixedly connected to the flanges. The top flange of the connecting hose I is fixedly connected to the storage tank via bolts and nuts. The bottom flange of the connecting hose I is fixedly connected to the tapered tube via bolts and nuts. The bottom of the tapered tube is fixedly connected to the connecting hose II. The connecting hose II is fixedly connected to the screw conveyor system. Several sets of springs are provided on both sides of the connecting hose I. Gaskets are welded to both ends of the springs. The top gaskets of the springs are fitted into the bolts on the top flange of the connecting hose I and the bolts connecting to the storage tank. The spring bottom gasket is fitted into the bottom flange of the connecting hose I and the bolts connecting the tapered tube. A connecting frame is provided on the side wall of the tapered tube, and a vibration motor is installed on the connecting frame. A protective shell is provided on the outside of the vibration motor. A fixed frame I is provided inside the tapered tube. A tapered seat is located at the top of the fixed frame I and is rotatably connected to the fixed frame I. The bottom of the tapered seat passes through the fixed frame I and is provided with a bevel gear. The motor I is installed on the outside of the tapered tube. A protective shell is provided on the outside of the motor I. The output shaft of the motor I is connected to a rotating shaft through a coupling. The rotating shaft passes through the side wall of the tapered tube and is provided with a bevel gear. One end of the rotating shaft bevel gear meshes with the bottom bevel gear of the tapered seat. A protective shell is provided at the meshing point between the rotating shaft bevel gear and the bottom bevel gear of the tapered seat.

2. The cement admixture powder metering and conveying system according to claim 1, characterized in that... The pointed end of the tapered tube is located inside the storage tank. A fixing ring is provided on the tapered tube, and several sets of loosening plates are provided on the fixing ring. The loosening plates are fixedly connected to the fixing ring by bolts and nuts.

3. The cement admixture powder metering and conveying system according to claim 1, characterized in that... The main mixing system is equipped with a discharge port at the bottom.

4. The cement admixture powder metering and conveying system according to claim 1, characterized in that... The storage tank and the mixing mechanism are both equipped with fixing plates at the bottom, which are used to fix the spiral conveying system at the bottom of the storage tank and the mixing mechanism.

5. A cement admixture powder metering and conveying system according to claim 1, characterized in that... The mixing mechanism includes a mixing chamber, a stirring frame, spiral blades, motor II, and motor III. A spiral conveying system at the bottom of the storage tank connects to the mixing chamber. A mixing tank is located at the bottom of the mixing chamber. Two sets of fixed frames II are installed inside the mixing tank, respectively fixedly connected to the top and bottom of the mixing tank. The stirring frame is rotatably mounted between the two sets of fixed frames II. The top of the stirring frame passes through the fixed frames II and is equipped with a bevel gear. Motor II is mounted on the outer wall of the mixing tank. A protective shell is provided on the outside of motor II. The output shaft of motor II is connected to a rotating shaft via a coupling. The rotating shaft passes through the side wall of the mixing tank and is equipped with a bevel gear. One end of the rotating shaft's bevel gear meshes with the top bevel gear of the stirring frame. The mixing tank has a protective shell at the meshing point between the bevel gear at one end of the rotating shaft and the top bevel gear of the mixing frame. The mixing frame has a mixing cylinder in the middle, with through holes on both the upper and lower side walls. The spiral blades are rotatably installed inside the mixing cylinder, with the bottom end of the spiral blades passing through the mixing cylinder and the fixed frame II and having a bevel gear. The motor III is installed on the outer wall of the mixing tank, with a protective shell on the outside of the motor III. The output shaft of the motor III is connected to the rotating shaft via a coupling, with the rotating shaft passing through the side wall of the mixing tank and having a bevel gear. The bevel gear at one end of the rotating shaft meshes with the bottom bevel gear of the spiral blade, and a protective shell is provided at the meshing point between the bevel gear at one end of the rotating shaft and the bottom bevel gear of the spiral blade. The mixing frame has several sets of mixing plates.

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