A mixing device for the production of concrete additives

Abstract

The present invention relates to the field of mixing technology, and specifically discloses a mixing device for the production of concrete additives. The mixing device for the production of concrete additives of the present invention includes a frame and a mixing cylinder. The mixing cylinder rotates on the frame. A feeding component and an extrusion component are arranged in the mixing cylinder. The feeding component includes a feeding cylinder, a driving shaft and a motor. A storage cavity and a communication port are formed in the feeding cylinder. The powder material is added into the storage cavity of the feeding cylinder, and the feeding cylinder is driven to rotate by the driving shaft of the motor. When the mixing cylinder rotates to a horizontal or inclined state, the materials in the storage cavity fall into the mixing cylinder in batches from the communication port, improving the mixing uniformity and mixing efficiency of the mixing device.

Description

Technical Field

[0001] The present invention relates to the field of mixing technology, and particularly to a mixing device for the production of concrete additives. Background Art

[0002] A concrete additive is a small amount of chemical or mineral material added during the concrete mixing process. Its main functions are to improve the performance of concrete, increase construction efficiency, or make the concrete meet specific engineering requirements. Dry powder concrete additives are a common form of concrete admixtures, usually existing in the form of powdery substances and directly added during the concrete mixing process. The functions and applications of dry powder additives are mainly reflected in improving the workability, strength, durability, etc. of concrete. According to different working conditions and requirements, dry powder additives can be used to adjust the setting time of concrete, enhance its crack resistance, improve frost resistance, etc.

[0003] A patent document with the publication number CN212492640U discloses a double-cone mixer, which includes a frame. The inner top of the frame is provided with a mixing cylinder, and the top and bottom of the mixing cylinder are respectively provided with a feed inlet and a discharge outlet. A lead screw, a reduction motor, a sliding block, and an opening and closing assembly are provided at the feed inlet and the discharge outlet. The reduction motor drives the lead screw to rotate, the rotation of the lead screw drives the sliding block to move, and the sliding block controls the movement of the opening and closing assembly. Under the action of the opening and closing assembly, the automatic opening and closing of the mixing cylinder can be quickly realized.

[0004] However, the following problems still exist in this solution. When adding materials to the double-cone mixer, multiple materials can only be added to the mixing cylinder all at once, which easily causes the multiple materials to form layers in the mixing device, resulting in poor mixing uniformity in the mixing device and affecting the mixing efficiency of the mixing device for the materials. Summary of the Invention

[0005] The present invention provides a mixing device for the production of concrete additives, aiming to solve the problem in the related technology that when adding multiple powder materials, adding multiple materials into the mixing device at the same time causes the powder materials to form layers in the mixing device, easily resulting in uneven mixing of the mixing device and affecting the mixing efficiency of the mixing device.

[0006] A mixing device for producing a concrete additive according to the present invention includes a frame and a mixing cylinder rotatably arranged on the frame. A feeding component and an extrusion component are arranged in the mixing cylinder. The feeding component includes a feeding cylinder rotatably assembled in the mixing cylinder and a driving member connected to the feeding cylinder and used to drive the feeding cylinder to rotate. A storage cavity is formed in the feeding cylinder, and a communication port is formed on the side surface of the feeding cylinder so that when the feeding cylinder rotates, the material enters the mixing cylinder through the communication port. The extrusion component includes a plurality of arc-shaped plates rotatably assembled on the side surface of the feeding cylinder. When the mixing cylinder is in a non-vertical state, the rotation of the feeding cylinder causes the arc-shaped plates to swing under the action of their own gravity, and the arc-shaped plates swing to extrude the material between the feeding cylinder and the arc-shaped plates.

[0007] The effect is that various materials are added into the mixing device in batches. Adding in batches can ensure that the amount of each added material is appropriate, avoiding uneven mixing caused by adding too much material at once. When adding gradually, the mixing device has more time and space to fully stir each part of the material, which helps to achieve a better mixing effect and can improve the mixing efficiency of the mixing device.

[0008] Preferably, the storage cavity is arranged along the axial direction of the feeding cylinder, and a protrusion is formed at the center of the storage cavity in the direction away from the axis of the feeding cylinder. A communication port is formed on the side wall of the feeding cylinder, and the communication port is formed at the protrusion of the storage cavity. When the feeding cylinder rotates, it drives the material to gather at the communication port and then discharges through the communication port.

[0009] The effect is that when the mixing cylinder rotates, the material in the storage cavity can be fully discharged from the storage cavity into the mixing cylinder.

[0010] Preferably, baffles are arranged on both sides of the arc-shaped plate along the axial direction of the feeding cylinder, and a screening groove is formed on the arc-shaped plate. The screening groove is used to screen the agglomerated powder and retain the agglomerated powder between the arc-shaped plate and the feeding cylinder.

[0011] The effect is that through the screening of the screening groove, the normal powder falls into the mixing cylinder for mixing, and the agglomerated powder remains between the arc-shaped plate and the feeding cylinder. When extruding the agglomerated powder, the influence of other powders on the extrusion effect can be avoided.

[0012] Preferably, the inner diameter of the arc-shaped plate is the same as the outer diameter of the feeding cylinder, and the side surface of the baffle close to the feeding cylinder coincides with the end surface of the feeding cylinder. When the arc-shaped plate is in a closed state, the inner wall of the arc-shaped plate fits with the outer wall of the feeding cylinder, and the baffle rotates to the end of the feeding cylinder.

[0013] The effect is that the arc-shaped plate can be in full contact with the feeding cylinder to better extrude and crush the agglomerated material.

[0014] Preferably, a plurality of storage cavities are formed in the feeding cylinder. A blocking block is slidably arranged in each storage cavity, and the plurality of blocking blocks correspond to the plurality of arc-shaped plates one by one. A compression spring for driving the blocking block to move towards the outside of the storage cavity is arranged in the storage cavity. When the feeding cylinder rotates, the blocking block is used to block the material between the arc-shaped plate and the feeding cylinder.

[0015] The effect is that the blocking block blocks the agglomerated material falling on the outer wall of the feeding cylinder, preventing it from directly falling into the mixing cylinder through the outer wall of the feeding cylinder without being extruded.

[0016] Preferably, one end of the mixing cylinder is provided with an end cover one. A motor is fixedly arranged on the end cover one. A driving shaft is fixedly arranged on the output end of the motor. The driving shaft is connected to the feeding cylinder. A through groove penetrating the end cover one is formed in the end cover one. A friction disc is rotatably arranged in the through groove. A sleeve group for driving the friction disc and the feeding cylinder to rotate synchronously is arranged between the friction disc and the feeding cylinder. The driving shaft is in spiral fit with the feeding cylinder. A limiting plate one is slidably arranged on the end cover one. The limiting plate one abuts against the friction disc to fix the friction disc. When the friction disc is fixed, the driving shaft rotates to drive the feeding cylinder to move out of the mixing cylinder and then add materials.

[0017] The effect is that by restricting the rotation of the friction disc, the synchronous rotation and relative axial movement between the feeding cylinder and the driving shaft are realized, the switching between two states is realized, and the operation of the mixing device is facilitated.

[0018] Preferably, a slideway is fixedly arranged on the end cover one. A control rod one is arranged in the slideway. The control rod one is in spiral fit with the slideway. A through hole adapted to the control rod one is formed in the limiting plate one. The control rod one is rotatably arranged in the through hole of the limiting plate one. When the control rod one moves in the slideway, it drives the limiting plate one to move synchronously.

[0019] The effect is that the movement of the limiting plate is driven through spiral fit, and at the same time, the self-locking characteristic of spiral transmission is utilized to avoid the sliding of the limiting plate and the unstable working state during the working process.

[0020] Preferably, a sealing plate is fixedly arranged at one end of the feeding cylinder close to the end cover one. The sealing plate is arranged between the friction disc and the feeding cylinder. A through hole adapted to the sleeve group is formed at the center of the sealing plate.

[0021] The effect is that the friction disc and the material are separated by the sealing plate, preventing the material from falling on the friction disc and affecting the state switching of the friction disc.

[0022] Preferably, a feeding component is slidably arranged on the frame. The feeding component includes a connecting block and a limiting plate two. The limiting plate two is fixedly arranged on the connecting block. The connecting block slides on the frame. The connecting block is positioned by contacting the arc-shaped plate through the limiting plate two.

[0023] Its effect is that the feeding component can be conveniently positioned through the limiting plate.

[0024] Preferably, an avoidance groove adapted to the communication port is provided on the arc-shaped plate, a feeding pipe is provided on the connecting block, the connecting block slides to drive the feeding pipe to be inserted into the communication port through the avoidance groove, and the end of the feeding pipe away from the feeding cylinder is funnel-shaped, and the powder material is added into the storage cavity through the feeding pipe.

[0025] Its effect is that through the setting of the feeding pipe, it is more convenient to add the material into the storage cavity.

[0026] Beneficial effects: 1. Add various powder materials into the mixing cylinder in batches to improve the mixing uniformity and mixing efficiency of the mixing device for powder materials.

[0027] 2. Stir and screen the materials in the mixing cylinder through the arc-shaped plate, keep the agglomerated materials on the arc-shaped plate, and extrude the agglomerated powder materials when the arc-shaped plate is closed, which improves the mixing effect of the mixing device on the materials. Brief Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the present invention.

[0029] Figure 2 It is a partially sectional view of the cleaning cylinder in the present invention.

[0030] Figure 3 It is an internal structural diagram of the feeding cylinder in the present invention.

[0031] Figure 4 It is a schematic diagram of the cooperation between the feeding component and the extrusion component.

[0032] Figure 5 It is a partial sectional view of the extrusion component in the present invention.

[0033] Figure 6 It is Figure 5 A partial enlarged view of part A in

[0034] Figure 7 It is a schematic diagram of the state of the extrusion component in the present invention.

[0035] Figure 8 It is an exploded view of the control structure of the feeding cylinder in the present invention.

[0036] Figure 9 It is Figure 8 A partial enlarged view of part B in

[0037] Figure 10 It is a schematic structural diagram of the feeding component in the present invention.

[0038] Figure 11 It is Figure 10Partial enlarged view at position C in the figure.

[0039] Reference numerals: 1, frame; 11, mixing cylinder; 111, first end cover; 1111, slideway; 1112, through groove; 1113, cavity; 112, second end cover; 113, sealing plate; 2, feeding assembly; 21, feeding cylinder; 211, storage cavity; 212, communication port; 216, connecting column; 22, motor; 23, drive shaft; 3, extrusion assembly; 31, arc plate; 311, avoidance groove; 312, screening groove; 313, baffle; 32, stop block; 41, friction disk; 42, sleeve group; 43, first control rod; 44, first limiting plate; 5, feeding component; 51, second control rod; 52, connecting block; 53, second limiting plate; 54, feeding pipe. Detailed implementation manners

[0040] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0041] Referring to Figures 1 to 11 , a mixing device for producing concrete additives according to the present invention includes a frame 1, a mixing cylinder 11, a feeding assembly 2, an extrusion assembly 3, and a feeding component 5. A driving member for driving the mixing cylinder 11 to rotate is provided on the frame 1, and the output shaft of the driving member is fixedly connected to the side surface of the mixing cylinder 11 to drive the mixing cylinder 11 to rotate and mix the materials. The feeding assembly 2 is rotatably arranged in the mixing cylinder 11, the feeding component 5 is arranged below the mixing cylinder 11, and the extrusion assembly 3 is rotatably arranged on the feeding assembly 2. A first end cover 111 and a second end cover 112 are arranged at both ends of the mixing cylinder 11. The first end cover 111 is fixedly arranged on the mixing cylinder 11, and the second end cover 112 is in spiral fit with the mixing cylinder 11.

[0042] During operation, by rotating the second end cover 112, one end of the mixing cylinder 11 is opened, the feeding assembly 2 is removed from the mixing cylinder 11 and moved to the feeding component 5. A variety of powder materials to be mixed are added to the feeding assembly 2 through the feeding component 5. Then, the feeding assembly 2 is moved back into the mixing cylinder 11. Next, by rotating the second end cover 112, one end of the mixing cylinder 11 is closed. When the mixing cylinder 11 rotates, the feeding assembly 2 rotates accordingly, and the powder materials in the feeding assembly 2 fall into the mixing cylinder 11 in batches. During this process, the extrusion assembly 3 will extrude and break up the agglomerated materials.

[0043] Referring to Figures 1 to 3, the feeding assembly 2 includes a feeding cylinder 21 rotatably assembled in the mixing cylinder 11 and a driving member connected to the feeding cylinder 21 for driving the feeding cylinder 21 to rotate. The driving member is set as a motor 22. The output end of the motor 22 is provided with a driving shaft 23. The feeding cylinder 21 is coaxially arranged in the mixing cylinder 11. The motor 22 is fixedly arranged on the first end cover 111. The first end cover 111 is provided with a through hole adapted to the driving shaft 23. The output end of the motor 22 is fixedly connected to the driving shaft 23. The driving shaft 23 passes through the through hole on the first end cover 111 and extends into the interior of the mixing cylinder 11. A plurality of material storage cavities 211 are formed in the feeding cylinder 21. The multiple material storage cavities 211 are evenly distributed in the circumferential direction of the feeding cylinder 21. The number of the material storage cavities 211 is 4. And each material storage cavity 211 is formed in the axial direction of the feeding cylinder 21. The areas at both ends of the material storage cavity 211 are smaller than the area at the center of the material storage cavity 211, that is, the center of the material storage cavity 211 bulges in the direction away from the axis of the feeding cylinder 21. A communication port 212 is formed on the side wall of the feeding cylinder 21. The communication port 212 is formed at the bulge of the material storage cavity 211. A variety of powder materials are respectively placed in the corresponding material storage cavities 211. Then when the mixing cylinder 11 rotates, the feeding cylinder 21 also starts to rotate. When the mixing cylinder 11 rotates to a nearly horizontal state, when the feeding cylinder 21 rotates, the powder materials in the material storage cavity 211 will gather at the communication port 212 and fall into the mixing cylinder 11 through the communication port 212. With the rotation of the feeding cylinder 21, the powder materials in the multiple material storage cavities 211 are respectively added into the mixing cylinder 11 in batches. With the rotation of the mixing cylinder 11, the materials are added in batches, which can increase the uniformity and mixing efficiency of the material mixing.

[0044] Refer to Figures 4 to 7 , the extrusion assembly 3 is rotatably arranged on the feeding cylinder 21. The extrusion assembly 3 includes a plurality of arc-shaped plates 31. A plurality of connecting columns 216 are evenly arranged on the outer wall circumference of the feeding cylinder 21. The arc-shaped plates 31 are provided with through holes adapted to the connecting columns 216 to realize the rotation of the arc-shaped plates 31 relative to the connecting columns 216. When the mixing cylinder 11 is in a non-vertical state, the rotation of the feeding cylinder 21 can cause the arc-shaped plates 31 to swing. The arc-shaped plates 31 have two states, namely an open state and a closed state. When the arc-shaped plates 31 are in the open state, one end of the arc-shaped plates 31 contacts the inner wall of the mixing cylinder 11. With the rotation of the feeding cylinder 21, the materials in the mixing cylinder 11 move onto the arc-shaped plates 31. When the arc-shaped plates 31 are in the closed state, the powder materials on the arc-shaped plates 31 are extruded, and the agglomerated powder materials in the powder materials can be broken. When the arc-shaped plates 31 are in the open state again, the materials on the arc-shaped plates 31 fall back into the mixing cylinder 11 for mixing.

[0045] Refer to Figures 4 to 7, a screening groove 312 is formed in the arc-shaped plate 31, and baffles 313 are fixedly arranged at both ends of the arc-shaped plate 31. When the material moves onto the arc-shaped plate 31, the agglomerated powder is intercepted on the arc-shaped plate 31 through the screening groove 312, and the remaining powder falls into the mixing cylinder 11 for continuous mixing, increasing the mixing effect of the mixing device on the material along the circumferential direction of the mixing cylinder 11. At the same time, when the arc-shaped plate 31 is closed, the influence of the remaining powder on the extrusion effect of the arc-shaped plate 31 on the agglomerated powder is avoided. The baffles 313 at both ends of the arc-shaped plate 31 are used to prevent the agglomerated powder from directly flowing into the mixing cylinder 11 from both ends of the arc-shaped plate 31 when the arc-shaped plate 31 is in an inclined state. The inner diameter of the arc-shaped plate 31 is the same as the outer diameter of the feeding cylinder 21, and the side surface of the baffle 313 close to the feeding cylinder 21 coincides with the end faces at both ends of the feeding cylinder 21. When the arc-shaped plate 31 is closed, the inner wall of the arc-shaped plate 31 fits against the outer wall of the feeding cylinder 21, and the baffle 313 rotates to the end of the feeding cylinder 21, enhancing the extrusion effect of the arc-shaped plate 31 on the agglomerated material.

[0046] Refer to Figures 4 to 7 , a number of stoppers 32 corresponding to the arc-shaped plates 31 one by one are arranged on the outer wall of the feeding cylinder 21, and a receiving cavity adapted to the stoppers 32 is formed on the side wall of the feeding cylinder 21. The receiving cavity is located inside the arc-shaped plate 31. The stoppers 32 are slidably arranged in the receiving cavity, and a compression spring is arranged in the receiving cavity, which makes the stoppers 32 extend out of the receiving cavity. As the mixing cylinder 11 rotates, when the mixing cylinder 11 rotates to a non-vertical state, when the feeding cylinder 21 rotates, under the action of its own gravity, multiple arc-shaped plates 31 will be in open and closed states respectively. The end of the arc-shaped plate 31 in the open state away from the feeding cylinder 21 fits against the inner wall of the mixing cylinder 11. Then, as the feeding cylinder 21 rotates, the arc-shaped plate 31 scrapes up the material on the inner wall of the mixing cylinder 11. Then, as the arc-shaped plate 31 continues to rotate, the powder moves along the inner diameter of the arc-shaped plate 31 and then falls back onto the inner wall of the mixing cylinder 11 through the screening groove 312. The agglomerated material will stay inside the arc-shaped plate 31 near the connecting column 216. As the feeding cylinder 21 continues to rotate, when the arc-shaped plate 31 rotates above the feeding cylinder 21, the arc-shaped plate 31 begins to close. The agglomerated powder on the arc-shaped plate 31 will be stored in the position between the arc-shaped plate 31 and the stopper 32. When the arc-shaped plate 31 is about to be completely closed, the arc-shaped plate 31 abuts against the stopper 32 and presses the stopper 32 back into the receiving cavity, while squeezing the agglomerated material. When the arc-shaped plate 31 is opened again, the crushed agglomerated material falls back onto the inner wall of the mixing cylinder 11. The rotation of the arc-shaped plate 31 increases the mixing effect of the material along the circumferential direction of the mixing cylinder 11 in the mixing cylinder 11, improves the mixing effect and mixing efficiency of the mixing cylinder 11 on the material, and at the same time squeezes and crushes the agglomerated powder, which can improve the mixing effect of the mixing device on the powder.

[0047] Refer to Figure 8 and Figure 9, a through groove 1112 is provided at the center of the first end cap 111. A friction disc 41 is rotatably arranged in the through groove 1112, and the friction disc 41 is coaxially arranged with the mixing cylinder 11. A sealing plate 113 is fixedly arranged inside the first end cap 111. The sealing plate 113 is located between the friction disc 41 and the feeding cylinder 21 and is used to separate the friction disc 41 from the material to prevent the material from accumulating on the friction disc 41 and affecting the rotation of the friction disc 41. A sleeve group 42 is arranged between the friction disc 41 and the mixing cylinder 11. The sleeve group 42 is composed of a plurality of sleeves connected in a sliding manner, and the plurality of sleeves rotate synchronously. The sleeves at both ends are respectively fixedly arranged on the friction disc 41 and the feeding cylinder 21 to realize the synchronous rotation of the friction disc 41 and the feeding cylinder 21. A cavity 1113 penetrating the first end cap 111 is provided in the radial direction of the first end cap 111. A first limiting plate 44 is slidably arranged in the cavity 1113. A slideway 1111 is fixedly arranged on the end face of the first end cap 111 corresponding to the cavity 1113. An extension plate is arranged on the side of the first limiting plate 44 away from the first end cap 111, and a round hole is provided on the extension plate. A first control rod 43 is arranged in the slideway 1111, and the first control rod 43 is in a spiral fit with the slideway 1111. As the first control rod 43 rotates, the first control rod 43 moves along the radial direction of the first end cap 111, and the first control rod 43 and the round hole on the extension plate of the first limiting plate 44 can rotate relative to each other. When the first control rod 43 moves, it can drive the first limiting plate 44 to move synchronously. A spiral groove is also provided on the drive shaft 23. A spiral protrusion adapted to the spiral groove on the drive shaft 23 is arranged at the center of the feeding cylinder 21. When the first limiting plate 44 is separated from the friction disc 41 and the motor 22 drives the drive shaft 23 to rotate, the friction disc 41 and the feeding cylinder 21 rotate synchronously with the drive shaft 23 under the action of the spiral fit. At this time, the mixing cylinder 11 does not move axially relative to the drive shaft 23. When the first limiting plate 44 is in a state of being in contact with the friction disc 41, the friction disc 41 cannot rotate. At this time, when the drive shaft 23 rotates, the drive shaft 23 rotates relative to the feeding cylinder 21. At this time, under the action of the spiral fit between the two, the feeding cylinder 21 moves axially relative to the drive shaft 23, and the feeding cylinder 21 can be moved out of the mixing cylinder 11, which is convenient for subsequent addition of the powder material.

[0048] Refer to Figure 10 and Figure 11, the feeding assembly 5 includes a second control rod 51, a connecting block 52, a second limiting plate 53 and a feeding pipe 54. A chute is provided on the frame 1, and the connecting block 52 slides in the chute. The second limiting plate 53 is arranged on one side of the connecting block 52 close to the mixing cylinder 11. An avoidance groove 311 adapted to the communication port 212 on the feeding cylinder 21 is provided on the arc-shaped plate 31. When the feeding cylinder 21 is moved out of the mixing cylinder 11, the connecting block 52 is controlled to move towards the feeding cylinder 21 through the second control rod 51, and the second limiting plate 53 fits on the outer side of the arc-shaped plate 31. Then the feeding pipe 54 extends to the communication port 212 on the feeding cylinder 21. Then, by adding materials at the other end of the feeding pipe 54, the materials can be added into the storage cavity 211 of the feeding cylinder 21. Then the feeding assembly 5 is controlled to move away from the feeding cylinder 21. Subsequently, the feeding cylinder 21 is rotated to move the other communication ports 212 to the feeding assembly 5 respectively, and the above operation is repeated to add various materials into the feeding cylinder 21 respectively.

[0049] The implementation principle of the present invention is as follows: Rotate the second end cap 112 to open one end of the mixing cylinder 11, move the feeding cylinder 21 out of the mixing cylinder 11, add the powder material into the feeding cylinder 21 through the feeding assembly 5, then move the feeding cylinder 21 into the mixing cylinder 11, and then rotate the end cap 112 to close one end of the mixing cylinder 11. While the mixing cylinder 11 is rotating, the feeding cylinder 21 is driven to rotate by the motor 22. As the mixing cylinder 11 and the feeding cylinder 21 rotate, the powder material in the feeding cylinder 21 will fall into the mixing cylinder 11 in batches from the communication ports 212, and the arc-shaped plate 31 will be opened and closed multiple times. When the arc-shaped plate 31 is opened, the mixing effect of the materials in the circumferential direction of the mixing cylinder 11 can be increased, and the agglomerated materials stay on the arc-shaped plate 31. As the arc-shaped plate 31 closes, the agglomerated materials are extruded, improving the uniformity of the material mixing in the mixing device and the mixing efficiency of the mixing device.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A mixing device for producing concrete additives, comprising a frame and a mixing drum rotatably arranged on the frame, characterized in that, A feeding component and an extrusion component are arranged inside the mixing cylinder. The feeding component includes a feeding cylinder rotatably assembled inside the mixing cylinder and a driving part connected to the feeding cylinder and used to drive the feeding cylinder to rotate. A storage cavity is formed inside the feeding cylinder, and a communication port is formed on the side surface of the feeding cylinder, so that when the feeding cylinder rotates, the material enters the mixing cylinder through the communication port. The extrusion component includes a plurality of arc-shaped plates rotatably assembled on the side surface of the feeding cylinder. When the mixing cylinder is in a non-vertical state, the rotation of the feeding cylinder will cause the arc-shaped plates to swing under the action of their own gravity, and the swinging of the arc-shaped plates extrudes the material between the feeding cylinder and the arc-shaped plates; The storage cavity is arranged along the axial direction of the feeding cylinder, and the center of the storage cavity protrudes in the direction away from the axis of the feeding cylinder. A communication port is formed on the side wall of the feeding cylinder, and the communication port is formed at the protruding part of the storage cavity. When the feeding cylinder rotates, it drives the material to gather at the communication port and then discharges through the communication port; Baffles are arranged on both sides of the arc-shaped plate along the axial direction of the feeding cylinder, and a screening groove is arranged on the arc-shaped plate. The screening groove can retain the agglomerated powder between the arc-shaped plate and the feeding cylinder; The inner diameter of the arc-shaped plate is the same as the outer diameter of the feeding cylinder, and the side surface of the baffle close to the feeding cylinder coincides with the end surface of the feeding cylinder. When the arc-shaped plate is in a closed state, the inner wall of the arc-shaped plate fits with the outer wall of the feeding cylinder, and the baffle rotates to the end of the feeding cylinder; A plurality of receiving cavities are formed on the feeding cylinder, a blocking block is slidably arranged in the receiving cavity, and a plurality of blocking blocks correspond to a plurality of arc-shaped plates one by one. A compression spring is arranged in the receiving cavity and used to drive the blocking block to move towards the outside of the receiving cavity; 2. The mixing device for producing a concrete additive according to claim 1, characterized in that, One end of the mixing cylinder is provided with an end cover one, a motor is fixedly arranged on the end cover one, a driving shaft is fixedly arranged on the output end of the motor, the driving shaft is connected to the feeding cylinder, a through groove penetrating the end cover one is formed on the end cover one, a friction disc is rotatably arranged in the through groove, and a sleeve group is arranged between the friction disc and the feeding cylinder and used to drive the friction disc and the feeding cylinder to rotate synchronously. The driving shaft is in spiral fit with the feeding cylinder, a limiting plate one is slidably arranged on the end cover one, the limiting plate one abuts against the friction disc to fix the friction disc. When the friction disc is fixed, the driving shaft rotates to drive the feeding cylinder to move out of the mixing cylinder and then add materials; 3. The mixing device for producing a concrete additive according to claim 2, characterized in that, A slideway is fixedly arranged on the end cover one, a control rod one is arranged in the slideway, the control rod one is in spiral fit with the slideway, a through hole adapted to the control rod one is formed on the limiting plate one, and the control rod one is rotatably arranged in the through hole on the limiting plate one. When the control rod one moves in the slideway, it drives the limiting plate one to move synchronously; 4. The mixing device for producing a concrete additive according to claim 2, characterized in that, A sealing plate is fixedly arranged at one end of the feeding cylinder close to the end cover one, the sealing plate is arranged between the friction disc and the feeding cylinder, and a through hole adapted to the sleeve group is formed at the center of the sealing plate; 5. The mixing device for producing a concrete additive according to claim 1, characterized in that, A feeding component is slidably arranged on the frame. The feeding component includes a connecting block and a limiting plate two. The limiting plate two is fixedly arranged on the connecting block. The connecting block slides on the frame, and the connecting block is positioned by contacting the arc-shaped plate through the limiting plate two; 6. The mixing device for producing a concrete additive according to claim 5, characterized in that, An avoidance groove adapted to the communication port is arranged on the arc-shaped plate, a feeding pipe is arranged on the connecting block, the sliding of the connecting block drives the feeding pipe to insert into the communication port through the avoidance groove, and one end of the feeding pipe away from the feeding cylinder is funnel-shaped, and the powder is added into the storage cavity through the feeding pipe;

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