Mixing device for concrete additive production

Abstract

The invention relates to the technical field of mixing, and particularly discloses a mixing device for concrete additive production, the mixing device for concrete additive production comprises a rack and a mixing cylinder, the mixing cylinder rotates on the rack, a feeding assembly and an extrusion assembly are arranged in the mixing cylinder, the feeding assembly comprises a feeding cylinder, a driving shaft and a motor, and the motor is connected with the driving shaft. The material storage cavity and the communication opening are formed in the material adding barrel, powder is added into the material storage cavity of the material adding barrel, the material adding barrel is driven to rotate through the driving shaft of the motor, and when the mixing barrel rotates to a horizontal or inclined state, materials in the material storage cavity fall into the mixing barrel from the communication opening in batches, so that the mixing uniformity and the mixing efficiency of the mixing device are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mixing, and in particular to a mixing device for producing concrete additives. Background Art

[0002] Concrete additives are a small amount of chemical or mineral materials added during the concrete mixing process. Their main function is to improve the performance of concrete, improve construction efficiency, or make concrete meet specific engineering requirements. Dry powder concrete additives are a common form of concrete admixtures, usually in the form of powdered substances, which are added directly during the concrete mixing process. The role and application of dry powder additives are mainly reflected in improving the workability, strength, durability, etc. of concrete. According to different working conditions and needs, dry powder additives can be used to adjust the setting time of concrete, enhance its crack resistance, improve frost resistance, etc.

[0003] A double-cone mixer is disclosed in a patent document with announcement number CN212492640U, which includes a frame, a mixing barrel is arranged on the inner top of the frame, a feed port and a discharge port are arranged on the top and bottom of the mixing barrel respectively, a screw rod, a reduction motor, a sliding block and an opening and closing assembly are arranged at the feed port and the discharge port, the screw rod is driven to rotate by the reduction motor, the rotation of the screw rod drives the sliding block to move, the sliding block controls the movement of the opening and closing assembly, and the mixing barrel can be quickly opened and closed automatically under the action of the opening and closing assembly.

[0004] However, this solution still has the following problems: when adding materials to the double-cone mixer, multiple materials can only be added to the mixing barrel all at once, which easily causes the multiple materials to form stratification in the mixing device, resulting in poor mixing uniformity when the mixing device is mixing, and affects the mixing efficiency of the mixing device for the materials. Summary of the invention

[0005] The present invention provides a mixing device for producing concrete additives, aiming to solve the problem in the related art that when adding multiple powders, multiple materials are added to the mixing device at the same time, causing the powders to form stratification in the mixing device, which easily leads to uneven mixing of the mixing device and affects the mixing efficiency of the mixing device.

[0006] The present invention discloses a mixing device for producing concrete additives, comprising a frame and a mixing drum rotatably arranged on the frame, wherein a feeding assembly and an extrusion assembly are arranged in the mixing drum, wherein the feeding assembly comprises a feeding drum rotatably arranged in the mixing drum and a driving member connected to the feeding drum and used for driving the feeding drum to rotate, wherein a material storage chamber is provided in the feeding drum, and a connecting port is provided on the side of the feeding drum so that when the feeding drum rotates, the material enters the mixing drum through the connecting port, and the extrusion assembly comprises a plurality of arc plates rotatably arranged on the side of the feeding drum, and when the mixing drum is in a non-vertical state, the rotation of the feeding drum causes the arc plates to swing under the action of their own gravity, and the swing of the arc plates squeezes the material between the feeding drum and the arc plates.

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

[0008] Preferably, the storage chamber is arranged along the axial direction of the adding barrel, and the center of the storage chamber protrudes in the direction away from the axis of the adding barrel. A connecting port is opened on the side wall of the adding barrel, and the connecting port is opened at the protrusion of the storage chamber. When the adding barrel rotates, it drives the material to gather at the connecting port and then discharges it through the connecting port.

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

[0010] Preferably, baffles are provided on both sides of the arc plate along the axial direction of the feeding tube, and a screening groove is provided on the arc plate, which is used to screen agglomerated powder and retain the agglomerated powder between the arc plate and the feeding tube.

[0011] The effect is that the powder is screened by the screening trough, the normal powder falls into the mixing barrel for mixing, and the agglomerated powder remains between the arc plate and the feeding barrel. When the agglomerated powder is extruded, the influence of other powders on the extrusion effect can be avoided.

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

[0013] The effect is that the arc plate can fully contact with the feeding tube, so as to better extrude and crush the agglomerated materials.

[0014] Preferably, a plurality of storage cavities are provided on the feeding barrel, and a block is slidably arranged in the storage cavity, and the plurality of blocks correspond one-to-one to the plurality of arc plates. A compression spring is arranged in the storage cavity for driving the block to move toward the outside of the storage cavity. When the feeding barrel rotates, the block is used to block the material between the arc plate and the feeding barrel.

[0015] The effect is that the block blocks the agglomerated materials falling on the outer wall of the feeding tube, preventing them from falling directly into the mixing tube through the outer wall of the feeding tube without being squeezed.

[0016] Preferably, an end cover is provided at one end of the mixing barrel, a motor is fixedly provided on the end cover, a driving shaft is fixedly provided on the output end of the motor, the driving shaft is connected to the feeding barrel, a through groove penetrating the end cover is opened on the end cover, a friction disk is rotatably provided in the through groove, a sleeve group for driving the friction disk and the feeding barrel to rotate synchronously is provided between the friction disk and the feeding barrel, the driving shaft is spirally matched with the feeding barrel, a limiting plate is slidably provided on the end cover, the limiting plate abuts against the friction disk for fixing the friction disk, when the friction disk is fixed, the driving shaft rotates to drive the feeding barrel to move out of the mixing barrel to add materials.

[0017] The effect is that by limiting the rotation of the friction disk, the synchronous rotation and relative axial movement between the feeding cylinder and the driving shaft are achieved, the switching between the two states is achieved, and the operation of the mixing device is convenient.

[0018] Preferably, a slide is fixedly provided on the end cover 1, a control rod 1 is provided in the slide, the control rod 1 is spirally matched with the slide, a through hole adapted to the control rod 1 is opened on the limit plate 1, the control rod 1 is rotatably provided in the through hole on the limit plate 1, and when the control rod 1 moves in the slide, the limit plate 1 is driven to move synchronously.

[0019] The effect is that the movement of the limit plate is driven by the screw cooperation, and the self-locking characteristics of the screw transmission are utilized to avoid the sliding of the limit plate and avoid the unstable working state during the working process.

[0020] Preferably, a sealing plate is fixedly provided at one end of the feeding cylinder close to the end cover, the sealing plate is arranged between the friction disk and the feeding cylinder, and a through hole adapted to the sleeve assembly is opened at the center of the sealing plate.

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

[0022] Preferably, a feeding assembly is slidably arranged on the frame, and the feeding assembly includes a connecting block and a second limiting plate, the second limiting plate is fixedly arranged on the connecting block, and the connecting block slides on the frame, and the connecting block is positioned by contacting the arc plate through the second limiting plate.

[0023] The effect is that the positioning of the feeding component is facilitated by the limiting plate.

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

[0025] The effect is that, through the provision of the feeding pipe, it is more convenient to add materials into the storage cavity.

[0026] Beneficial effects: 1. Adding a variety of powders into the mixing barrel in batches can improve the uniformity and mixing efficiency of the mixing device for the powders.

[0027] 2. The materials in the mixing drum are stirred and screened by the arc plate, and the agglomerated materials are retained on the arc plate. When the arc plate is closed, the agglomerated powder is squeezed, thereby improving the mixing effect of the mixing device on the materials. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 2 It is a partially cutaway schematic diagram of the cleaning cylinder of the present invention.

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

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

[0032] Figure 5 is a partial cross-sectional view of an extrusion assembly of the present invention.

[0033] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

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

[0035] Figure 8 It is an exploded schematic diagram of the control structure of the feeding barrel in the present invention.

[0036] Fig. 9 yes Figure 8 A partial enlarged view of point B in the middle.

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

[0038] Fig.11 yes Fig.10A partial enlarged view of point C in the middle.

[0039] Figure numerals: 1, frame; 11, mixing barrel; 111, end cover one; 1111, slideway; 1112, through groove; 1113, cavity; 112, end cover two; 113, sealing plate; 2, feeding assembly; 21, feeding barrel; 211, storage cavity; 212, connecting port; 216, connecting column; 22, motor; 23, driving shaft; 3, extrusion assembly; 31, arc plate; 311, avoidance groove; 312, screening groove; 313, baffle; 32, block; 41, friction disc; 42, sleeve group; 43, control rod one; 44, limit plate one; 5, feeding assembly; 51, control rod two; 52, connecting block; 53, limit plate two; 54, feeding pipe. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] Reference Figures 1 to 11 A mixing device for producing concrete additives of the present invention comprises a frame 1, a mixing drum 11, a feeding assembly 2, an extrusion assembly 3 and a feeding assembly 5. A driving member for driving the mixing drum 11 to rotate is arranged on the frame 1. The output shaft of the driving member is fixedly connected to the side of the mixing drum 11, and is used to drive the mixing drum 11 to rotate and mix the materials. The feeding assembly 2 is rotatably arranged in the mixing drum 11, the feeding assembly 5 is arranged below the mixing drum 11, and the extrusion assembly 3 is rotatably arranged on the feeding assembly 2. End cap 111 and end cap 212 are arranged at both ends of the mixing drum 11. The end cap 111 is fixedly arranged on the mixing drum 11, and the end cap 212 is spirally matched with the mixing drum 11.

[0042] During operation, one end of the mixing barrel 11 is opened by rotating the second end cover 112, the adding component 2 is removed from the mixing barrel 11 and moved to the adding component 5, and a variety of powders to be mixed are added to the adding component 2 through the adding component 5, and then the adding component 2 is moved back into the mixing barrel 11, and then one end of the mixing barrel 11 is closed by rotating the second end cover 112. When the mixing barrel 11 rotates, the adding component 2 rotates accordingly, and the powder in the adding component 2 falls into the mixing barrel 11 in batches. In this process, the extrusion component 3 will extrude and crush the agglomerated materials.

[0043] Reference Figures 1 to 3The feeding assembly 2 includes a feeding barrel 21 rotatably assembled in the mixing barrel 11, and a driving member connected to the feeding barrel 21 for driving the feeding barrel 21 to rotate, wherein the driving member is a motor 22, and a driving shaft 23 is provided at the output end of the motor 22. The feeding barrel 21 is coaxially arranged in the mixing barrel 11, and the motor 22 is fixedly arranged on an end cover 111. A through hole adapted to the driving shaft 23 is provided on the end cover 111. The output end of the motor 22 is fixedly connected to the driving shaft 23, and the driving shaft 23 extends through the through hole on the end cover 111 to the inside of the mixing barrel 11. A plurality of storage cavities 211 are provided in the feeding barrel 21, and the plurality of storage cavities 211 are evenly distributed in the circumferential direction of the feeding barrel 21. The number of the storage cavities 211 is 4, and each storage cavity 211 is provided in the axial direction of the feeding barrel 21. The area is smaller than the area of ​​the center of the storage chamber 211, that is, the center of the storage chamber 211 is convex in the direction away from the axis of the adding barrel 21, and a connecting port 212 is opened on the side wall of the adding barrel 21, and the connecting port 212 is opened at the convex part of the storage chamber 21, and multiple powders are placed in the corresponding storage chambers 211 respectively, and then when the mixing barrel 11 rotates, the adding barrel 21 also starts to rotate. When the mixing barrel 11 rotates to a state close to the horizontal state, when the adding barrel 21 rotates, the powder in the storage chamber 211 will gather at the connecting port 212, and fall into the mixing barrel 11 through the connecting port 212. As the adding barrel 21 rotates, the powders in multiple storage chambers 211 fall into the mixing barrel 11 in batches respectively. As the mixing barrel 11 rotates, materials are added in batches, which can increase the uniformity and mixing efficiency of material mixing.

[0044] Reference Figures 4 to 7 The extrusion assembly 3 is rotatably arranged on the feeding barrel 21. The extrusion assembly 3 includes a plurality of arc-shaped plates 31. A plurality of connecting posts 216 are evenly arranged on the circumference of the outer wall of the feeding barrel 21. The arc-shaped plates 31 are provided with through holes adapted to the connecting posts 216 to realize the rotation of the arc-shaped plates 31 relative to the connecting posts 216. When the mixing barrel 11 is in a non-vertical state, the rotation of the feeding barrel 21 can make the arc-shaped plates 31 swing. The arc-shaped plates 31 have two states, namely, Open state and closed state. When the arc plate 31 is in the open state, one end of the arc plate 31 contacts the inner wall of the mixing cylinder 11. As the feeding cylinder 21 rotates, the material in the mixing cylinder 11 moves to the arc plate 31. When the arc plate 31 is in the closed state, the powder on the arc plate 31 is squeezed to break the agglomerated powder in the powder. When the arc plate 31 is in the open state again, the material on the arc plate 31 falls back into the mixing cylinder 11 for mixing.

[0045] Reference Figures 4 to 7The arc plate 31 is provided with a screening groove 312, and baffles 313 are fixedly provided at both ends of the arc plate 31. When the material moves onto the arc plate 31, the agglomerated powder is intercepted on the arc plate 31 through the screening groove 312, and the remaining powder falls into the mixing drum 11 to continue mixing, thereby increasing the mixing effect of the mixing device on the material along the circumference of the mixing drum 11, and at the same time avoiding that the remaining powder affects the squeezing effect of the arc plate 31 on the agglomerated powder when the arc plate 31 is closed. The baffles 313 at both ends are used to prevent the agglomerated powder from flowing directly from the two ends of the arc plate 31 into the mixing barrel 11 when the arc plate 31 is in a tilted state. The inner diameter of the arc plate 31 is the same as the outer diameter of the feeding barrel 21, and the side of the baffle 313 close to the feeding barrel 21 coincides with the end faces at both ends of the feeding barrel 21. When the arc plate 31 is closed, the inner wall of the arc plate 31 fits with the outer wall of the feeding barrel 21, and the baffle 313 rotates to the end of the feeding barrel 21, thereby enhancing the squeezing effect of the arc plate 31 on the agglomerated material.

[0046] Reference Figures 4 to 7 The outer wall of the feeding barrel 21 is provided with a plurality of stops 32 corresponding to the arc plates 31 one by one, and a storage cavity adapted to the stops 32 is opened on the side wall of the feeding barrel 21, and the storage cavity is located at the inner side of the arc plates 31, and the stops 32 are slidably arranged in the storage cavity, and a compression spring is arranged in the storage cavity, and the compression spring makes the stops 32 in a state of extending out of the storage cavity. As the mixing barrel 11 rotates, when the mixing barrel 11 rotates to a non-vertical state, when the feeding barrel 21 rotates, the arc plates 31 are under the action of their own gravity, and the plurality of arc plates 31 are respectively in an open and closed state, and the end of the arc plate 31 away from the feeding barrel 21 in the open state is in contact with the inner wall of the mixing barrel 11, and then as the feeding barrel 21 rotates, the arc plate 31 scrapes the material on the inner wall of the mixing barrel 11, and then as the arc plate 31 continues to rotate, the powder moves along the inner diameter of the arc plate 31, and then passes through the screening slot 3 12 falls back onto the inner wall of the mixing barrel 11, and the agglomerated material will stay on the inner side of the arc plate 31 near the connecting column 216. As the feeding barrel 21 continues to rotate, when the arc plate 31 rotates to above the feeding barrel 21, the arc plate 31 begins to close, and the agglomerated powder on the arc plate 31 will be stored in the position between the arc plate 31 and the stopper 32. When the arc plate 31 is about to be completely closed, the arc 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 plate 31 opens again, the crushed agglomerated material falls back onto the inner wall of the mixing barrel 11. The rotation of the arc plate 31 increases the mixing effect of the material in the mixing barrel 11 along the circumference of the mixing barrel 11, thereby improving the mixing effect and mixing efficiency of the mixing barrel 11 for the material. At the same time, the agglomerated powder is squeezed and crushed, which can improve the mixing effect of the mixing device for the powder.

[0047] Reference Figure 8 and Fig. 9A through groove 1112 is provided at the center of the end cover 111, and a friction disc 41 is rotatably arranged in the through groove 1112, and the friction disc 41 is coaxially arranged with the mixing barrel 11, and a sealing plate 113 is fixedly arranged inside the end cover 111, and the sealing plate 113 is located between the friction disc 41 and the feeding barrel 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, and a sleeve group 42 is arranged between the friction disc 41 and the mixing barrel 11, and the sleeve group 42 is arranged as a plurality of slidingly connected sleeves, and a plurality of The sleeves rotate synchronously, and the sleeves at both ends are fixedly arranged on the friction disk 41 and the feeding tube 21 respectively, so as to realize the synchronous rotation of the friction disk 41 and the feeding tube 21. A cavity 1113 penetrating the end cover 111 is provided in the radial direction of the end cover 111, and a limit plate 44 is slidably arranged in the cavity 1113. A slideway 1111 is fixedly arranged on the end surface of the end cover 111 corresponding to the position of the cavity 1113, and an extension plate is arranged on the side of the limit plate 44 away from the end cover 111, and a circular hole is arranged on the extension plate. A control rod 1 is arranged in the slideway 1111. 43, and the control rod 43 is spirally matched with the slideway 1111. With the rotation of the control rod 43, the control rod 43 is moved radially along the end cover 111, and the control rod 43 and the circular hole on the extension plate of the limit plate 44 can rotate relative to each other. When the control rod 43 moves, the limit plate 44 can be driven to move synchronously. A spiral groove is also provided on the drive shaft 23, and a spiral protrusion adapted to the spiral groove on the drive shaft 23 is provided at the center of the feeding barrel 21. When the limit plate 44 and the friction disk 41 are in a separated state, the motor 22 drives the drive When the shaft 23 rotates, the friction disk 41 and the feeding barrel 21 rotate synchronously with the driving shaft 23 under the action of the spiral fit. At this time, the mixing barrel 11 will not move axially relative to the driving shaft 23. When the limit plate 44 and the friction disk 41 are in a tight state, the friction disk 41 cannot rotate. At this time, when the driving shaft 23 rotates, the driving shaft 23 rotates relative to the feeding barrel 21. At this time, under the action of the spiral fit between the two, the feeding barrel 21 moves axially relative to the driving shaft 23, and the feeding barrel 21 can be moved out of the mixing barrel 11, which is convenient for the subsequent addition of powder.

[0048] Reference Fig.10 and Fig.11The feeding assembly 5 includes a control rod 2 51, a connecting block 52, a limiting plate 2 53 and a feeding pipe 54. A slide groove is provided on the frame 1, and the connecting block 52 slides in the slide groove. The limiting plate 2 53 is provided on the side of the connecting block 52 close to the mixing barrel 11. The arc plate 31 is provided with an avoidance groove 311 adapted to the connecting port 212 on the feeding barrel 21. When the feeding barrel 21 moves out of the mixing barrel 11, the connecting block 52 is controlled by the control rod 2 51 to move toward the feeding barrel 21. , the limiting plate 53 is attached to the outside of the arc plate 31, and then the feeding tube 54 extends to the connecting port 212 on the feeding barrel 21, and then by adding materials at the other end of the feeding tube 54, the materials can be added to the storage chamber 211 of the feeding barrel 21, and then the feeding component 5 is controlled to move away from the feeding barrel 21, and then the feeding barrel 21 is rotated to move the other connecting ports 212 to the feeding component 5 respectively, and the above operations are repeated to add multiple materials into the feeding barrel 21 respectively.

[0049] The implementation principle of the present invention is: rotate the end cover 112 to open one end of the mixing barrel 11, move the feeding barrel 21 out of the mixing barrel 11, add powder into the feeding barrel 21 through the feeding assembly 5, and then move the feeding barrel 21 into the mixing barrel 11, and then rotate the end cover 112 to close one end of the mixing barrel 11. While the mixing barrel 11 rotates, the feeding barrel 21 is driven to rotate by the motor 22. As the mixing barrel 11 and the feeding barrel 21 rotate, the powder in the feeding barrel 21 will fall into the mixing barrel 11 from the connecting port 212 in batches, and the arc plate 31 will be opened and closed multiple times. When the arc plate 31 is opened, the circumferential mixing effect of the material in the mixing barrel 11 can be increased, and the agglomerated material stays on the arc plate 31. As the arc plate 31 is closed, the agglomerated material is squeezed, thereby improving the uniformity of material mixing in the mixing device and improving the mixing efficiency of the mixing device.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A mixing device for producing concrete additives, comprising a frame (1) and a mixing drum (11) rotatably arranged on the frame (1), characterized in that: A material adding assembly (2) and an extrusion assembly (3) are arranged in the mixing barrel (11). The material adding assembly (2) comprises a material adding barrel (21) rotatably mounted in the mixing barrel (11) and a driving member connected to the material adding barrel (21) and used to drive the material adding barrel (21) to rotate. A material storage chamber (211) is provided in the material adding barrel (21). A connecting port (212) is provided on the side of the material adding barrel (21) so that when the material adding barrel (21) rotates, the material enters the mixing barrel (11) through the connecting port (212). The extrusion assembly (3) comprises a plurality of arc plates (31) rotatably mounted on the side of the material adding barrel (21). When the mixing barrel (11) is in a non-vertical state, the rotation of the material adding barrel (21) causes the arc plates (31) to swing under the action of their own gravity. The arc plates (31) swing to squeeze the material between the material adding barrel (21) and the arc plates (31).

2. A mixing device for producing concrete additives according to claim 1, characterized in that: The material storage chamber (211) is arranged along the axial direction of the material adding barrel (21), and the center of the material storage chamber (211) protrudes in a direction away from the axis of the material adding barrel (21). A connecting port (212) is provided on the side wall of the material adding barrel (21), and the connecting port (212) is provided at the protrusion of the material storage chamber (211). When the material adding barrel (21) rotates, the material is driven to gather at the connecting port (212) and then discharged through the connecting port (212).

3. A mixing device for producing concrete additives according to claim 1, characterized in that: Baffles (313) are provided on both sides of the arc plate (31) along the axial direction of the feeding cylinder (21). A screening groove (312) is provided on the arc plate (31). The screening groove (312) is used to screen agglomerated powder materials and retain the agglomerated powder materials between the arc plate (31) and the feeding cylinder (21).

4. A mixing device for producing concrete additives according to claim 3, characterized in that: The inner diameter of the arc plate (31) is the same as the outer diameter of the feeding tube (21), and the side surface of the baffle plate (313) close to the feeding tube (21) coincides with the end surface of the feeding tube (21). When the arc plate (31) is in a closed state, the inner wall of the arc plate (31) fits the outer wall of the feeding tube (21), and the baffle plate (313) rotates to the end of the feeding tube (21).

5. A mixing device for producing concrete additives according to claim 3, characterized in that: A plurality of receiving chambers are provided on the feeding cylinder (21), and a stopper (32) is slidably provided in the receiving chamber, and the plurality of stoppers (32) correspond to the plurality of arc-shaped plates (31) one by one. A compression spring is provided in the receiving chamber for driving the stopper (32) to move toward the outside of the receiving chamber. When the feeding cylinder (21) rotates, the stopper (32) is used to block the material between the arc-shaped plate (31) and the feeding cylinder (21).

6. A mixing device for producing concrete additives according to claim 5, characterized in that: An end cover (111) is provided at one end of the mixing barrel (11), a motor (22) is fixedly provided on the end cover (111), a drive shaft (23) is fixedly provided on the output end of the motor (22), the drive shaft (23) is connected to the feeding barrel (21), a through groove (1112) penetrating the end cover (111) is provided on the end cover (111), a friction disc (41) is rotatably provided in the through groove (1112), and a friction disc (41) is provided between the friction disc (41) and the feeding barrel (21). A sleeve group (42) is provided between the two parts for driving the friction disk (41) and the material adding barrel (21) to rotate synchronously. The driving shaft (23) is screw-matched with the material adding barrel (21). A limit plate (44) is slidably provided on the end cover (111). The limit plate (44) abuts against the friction disk (41) for fixing the friction disk (41). When the friction disk (41) is fixed, the driving shaft (23) rotates to drive the material adding barrel (21) to move out of the mixing barrel (11) to add materials.

7. A mixing device for producing concrete additives according to claim 6, characterized in that: A slideway (1111) is fixedly arranged on the end cover (111), a control rod (43) is arranged in the slideway (1111), the control rod (43) is screw-matched with the slideway (1111), a through hole matching the control rod (43) is opened on the limit plate (44), the control rod (43) is rotatably arranged in the through hole on the limit plate (44), and when the control rod (43) moves in the slideway (1111), the limit plate (44) is driven to move synchronously.

8. A mixing device for producing concrete additives according to claim 6, characterized in that: A sealing plate (113) is fixedly provided at one end of the material adding cylinder (21) close to the end cover (111); the sealing plate (113) is arranged between the friction disk (41) and the material adding cylinder (21); a through hole adapted to the sleeve assembly (42) is provided at the center of the sealing plate (113).

9. A mixing device for producing concrete additives according to claim 1, characterized in that: A feeding assembly (5) is slidably arranged on the frame (1), and the feeding assembly (5) comprises a connecting block (52) and a second limiting plate (53). The second limiting plate (53) is fixedly arranged on the connecting block (52). The connecting block (52) slides on the frame (1) and is positioned by contacting the second limiting plate (53) with the arc plate (31).

10. A mixing device for producing concrete additives according to claim 9, characterized in that: The arc-shaped plate (31) is provided with an avoidance groove (311) adapted to the communication port (212), and the connection block (52) is provided with a feeding pipe (54). The connection block (52) slides to drive the feeding pipe (54) to pass through the avoidance groove (311) and be inserted into the communication port (212), and one end of the feeding pipe (54) away from the feeding cylinder (21) is arranged in a funnel shape, and powder is added into the storage chamber (211) through the feeding pipe (54).

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