Quantitative concrete admixture mixing device and mixing method

Abstract

The invention discloses a concrete admixture quantitative mixing device and a mixing method, and relates to the technical field of concrete mixing. Comprising a barrel and a stirring shaft, stirring blades are rotatably connected to the stirring shaft, the transmission assembly comprises a rotating shaft which is rotatably connected with the stirring shaft and fixed to the stirring blades, an ejector rod is slidably connected into the rotating shaft, when the ejector rod slides, the ejector rod drives the rotating shaft to rotate, and the adjusting assembly is connected with the transmission assembly. The adjusting device comprises an adjusting rod slidably connected with the stirring shaft, adjusting grooves are formed in the two ends of the adjusting rod, when the ejector rod slides to the shallowest positions of the adjusting grooves, the stirring blades are changed from the vertical state to the horizontal state and used for shearing concrete, and when the ejector rod slides along the adjusting grooves, the angles of the stirring blades are dynamically changed, so that the stirring blades are in the horizontal state. Concrete is stirred; the driving assembly comprises a driving block fixedly connected with the cylinder body and is used for driving the adjusting rod to intermittently slide; the additive mixing device can improve the additive mixing efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete mixing, and in particular to a concrete admixture quantitative mixing device and a mixing method. Background Art

[0002] Concrete additives, also known as admixtures, are substances used to improve the performance of concrete. They are divided into four categories based on their primary function: admixtures that improve the concrete mix and properties include various water reducers, air entraining agents, and pumping agents; admixtures that regulate the setting time and hardening properties of concrete include retarders, early strength agents, and accelerated setting agents; admixtures that improve concrete durability include air entraining agents, waterproofing agents, and rust inhibitors; and admixtures that improve other concrete properties include air entraining agents, expansive agents, antifreeze agents, colorants, waterproofing agents, and pumping agents. When different concentrations of concrete additive raw materials are required for quantitative addition, concrete is the primary cementitious material. It is an artificial stone formed by uniformly mixing, compacting, and curing concrete with water, sand, gravel, and additives in appropriate proportions. In high-altitude cold regions, the durability, corrosion resistance, and impermeability of concrete are largely dependent on concrete admixtures. During the concrete processing process, additives need to be quantitatively added to ensure the durability, corrosion resistance, and impermeability of concrete.

[0003] At present, when adding concrete admixtures to concrete for mixing, concrete admixtures are always added at fixed points, which makes the mixing efficiency of concrete admixtures and concrete low, and also causes the problem of poor local performance of concrete. When the concrete slurry is mixed and stirred, since the stirring blades are fixed, they simply stir the concrete slurry in the cylinder and mix it with the liquid admixture, which will lead to the problem of uneven mixing of the admixture and concrete slurry, thereby reducing the performance of the concrete and further prolonging the time for mixing the concrete.

[0004] Therefore, a concrete admixture quantitative mixing device and a mixing method are invented to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a concrete admixture quantitative mixing device and mixing method, which can effectively solve the technical problems in the background technology.

[0006] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a concrete admixture quantitative mixing device, comprising a cylinder and a stirring shaft, wherein the stirring shaft is rotatably connected to two sets of axially distributed stirring blades, and further comprising:

[0007] A transmission assembly comprising a plurality of rotating shafts rotatably connected to the stirring shaft and fixed to the stirring blades, wherein a push rod is slidably connected within the rotating shaft, and when the push rod slides, the push rod drives the rotating shaft to rotate forward or reverse;

[0008] An adjustment assembly includes an adjustment rod slidably connected to the stirring shaft, with adjustment slots formed at both ends of the adjustment rod. When the push rod slides to the shallowest point of the adjustment slot, the stirring blade changes from a vertical position to a horizontal position for shearing concrete. When the push rod slides along the adjustment slot, the angle of the stirring blade changes dynamically for turning the concrete.

[0009] A driving assembly comprising a driving block fixedly connected to the cylinder body and configured to drive the adjusting rod to intermittent axial sliding;

[0010] The quantitative feeding assembly includes two pushing rings slidably connected to the stirring shaft and is used to push materials to different areas of the barrel.

[0011] Preferably, the transmission assembly includes an auxiliary groove opened on the rotating shaft, a guide groove is opened on the inner wall of the auxiliary groove, an insertion rod slidably connected to the guide groove is fixed on the push rod, and a first elastic member is provided between the auxiliary groove and the push rod.

[0012] Preferably, the adjustment assembly includes a receiving groove opened in the stirring shaft, the adjustment rod is slidably connected to the receiving groove, the top rod is slidably connected to the stirring shaft and one end close to the adjustment rod is in contact with the side wall of the adjustment groove, the axial cross-section of the adjustment groove is gyro-shaped and its side wall is stepped.

[0013] Preferably, the driving assembly includes a positioning cylinder fixedly connected to the cylinder body, the driving block is located in the positioning cylinder, a driving rod is fixed to one end of the adjusting rod close to the driving block, the free end of the driving rod is fixedly connected to a driving column through a connecting plate, and the free end of the driving column is in contact with the end face of the driving block.

[0014] Preferably, the connecting plate is slidably connected to the stirring shaft, and one end of the connecting plate away from the driving rod is connected to the stirring shaft via a second elastic member.

[0015] Preferably, the quantitative feeding assembly includes a transfer ring fixedly connected to the positioning cylinder, the transfer ring is rotatably connected to the stirring shaft, a channel connected to the transfer ring is opened in the stirring shaft, the channel is connected to the receiving groove, the push ring is slidably connected to the receiving groove, and the adjusting rod is located between the two push rings and is slidably connected to the push rings.

[0016] Preferably, a storage cylinder is provided on the cylinder body, and the bottom of the storage cylinder is connected to the transfer ring through a conduit.

[0017] Preferably, a plurality of discharge pipes are provided at both ends of the accommodating groove, and a flow limiting pipe is fixed on the pushing ring close to the channel, and the flow limiting pipe can extend into the channel.

[0018] Preferably, a driving motor is fixed on the cylinder, the output end of the driving motor is fixedly connected to the stirring shaft, a discharge pipe is provided at the bottom of the cylinder, a valve is provided on the discharge pipe for controlling the discharge, and a discharge mechanism is provided in the discharge pipe for fast discharge.

[0019] The present invention also provides a method for quantitatively mixing concrete admixtures, which utilizes a device for quantitatively mixing concrete admixtures for mixing, and comprises the following steps:

[0020] S1: starting the driving motor to drive the stirring blade to rotate through the stirring shaft and the rotating shaft to stir the concrete slurry;

[0021] S2: At the same time, the adjusting rod drives the push ring to slide, and the liquid admixture at different positions in the containing tank is quantitatively squeezed out through the discharge pipes at different positions into the cylinder to be mixed with the concrete slurry;

[0022] S3: During the rotation of the stirring shaft, the driving assembly and the adjusting assembly drive the stirring blade to dynamically adjust the angle, and dynamically flip different areas of the concrete slurry, so that the concrete slurry in different areas is better mixed with the liquid admixture;

[0023] S4: When the stirring blade changes from a vertical state to a horizontal state, the stirring blade is caused to shear the concrete slurry laterally, breaking up and separating large pieces of concrete for better mixing with the liquid admixture;

[0024] S5: After the liquid admixture is completely mixed in the concrete slurry, the driving motor is turned off, and then the concrete slurry in the cylinder is squeezed out from the discharge pipe through the discharge mechanism.

[0025] Technical effects and advantages of the present invention:

[0026] The present invention adopts the linkage arrangement of the adjusting rod, the adjusting groove, the push rod, the guide groove, the pushing ring, the insert rod and the rotating shaft, which not only makes the angle of the stirring blade change dynamically, and facilitates the turning and mixing of the concrete slurry in different areas, but also enables the stirring blade in the horizontal state to shear and crush the solidified concrete, and at the same time, quantitatively squeezes the concrete admixture into different areas, and fully mixes it with the concrete slurry in coordination with the stirring blade, thereby avoiding the problem of insufficient permeability of the concrete admixture, reducing the problem of poor local performance of the concrete, and further ensuring the overall performance of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2It is a full cross-sectional schematic diagram of the overall structure of the present invention;

[0029] Figure 3 Schematic diagram of the structure of the stirring shaft in the present invention;

[0030] Figure 4 This is a cross-sectional view of the structure of the stirring shaft in the present invention;

[0031] Figure 5 For the present invention Figure 4 A partial enlarged view of point A in the middle;

[0032] Figure 6 This is a schematic diagram of the structure of the present invention after removing the cylinder;

[0033] Figure 7 This is a schematic diagram of the structure of the present invention after removing the barrel and the stirring shaft;

[0034] Figure 8 It is a schematic diagram of the structure expansion of the rotating shaft in the present invention.

[0035] In the figure: 1, cylinder; 2, stirring shaft; 3, stirring blade;

[0036] 4. Transmission assembly; 401. Rotating shaft; 402. Push rod; 403. Auxiliary groove; 404. Guide groove; 405. Insert rod; 406. First elastic member;

[0037] 5. Adjustment assembly; 501. Adjustment rod; 502. Adjustment slot; 503. Accommodation slot;

[0038] 6. Driving assembly; 601. Driving block; 602. Positioning cylinder; 603. Driving rod; 604. Connecting plate; 605. Driving column; 606. Second elastic member;

[0039] 7. Quantitative feeding assembly; 701. Pushing ring; 702. Transfer ring; 703. Channel; 704. Storage cylinder; 705. Conduit; 706. Discharge pipe; 707. Flow limiting pipe;

[0040] 8. Driving motor; 9. Discharging pipe; 10. Valve; 11. Discharging mechanism. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] Example 1

[0043] like Figure 1 and Figure 2 As shown, this embodiment provides a concrete admixture quantitative mixing device, including a cylinder 1 and a stirring shaft 2, on which two groups of axially distributed stirring blades 3 are rotatably connected, and also includes: a quantitative feeding component 7, which includes two pushing rings 701 slidingly connected to the stirring shaft 2, for pushing materials to different areas of the concrete.

[0044] A driving motor 8 is fixed on the cylinder 1, and the output end of the driving motor 8 is fixedly connected to the stirring shaft 2. A discharge pipe 9 is provided at the bottom of the cylinder 1, and a valve 10 is provided on the discharge pipe 9 for controlling the discharge. A discharge mechanism 11 is provided in the discharge pipe 9 for fast discharge.

[0045] During use, first add concrete slurry and liquid admixture into the cylinder 1, then start the drive motor 8, and the drive motor 8 drives the stirring blade 3 to rotate through the stirring shaft 2, so that the stirring blade 3 rotates along the cylinder 1 to stir and mix the concrete slurry, thereby mixing the concrete slurry and the liquid admixture, and improving the performance of the concrete slurry. After the stirring and mixing is completed, the valve 10 on the discharge pipe 9 is opened and the discharge mechanism 11 is started. Since the discharge mechanism 11 and the valve 10 are both existing technologies, the specific structure and connection method are no longer repeated, so that the concrete slurry in the cylinder 1 is discharged from the discharge pipe 9 for transportation or use.

[0046] Example 2

[0047] During use, it was found that when the concrete slurry was mixed and stirred, since the stirring blades 3 were fixed, the concrete slurry in the cylinder 1 was simply stirred and mixed with the liquid admixture. This would lead to uneven mixing of the admixture and the concrete slurry, thereby reducing the performance of the concrete. Therefore, further improvements were made on the basis of the above embodiment.

[0048] like Figures 2 to 8 As shown, the transmission assembly 4 includes a plurality of rotating shafts 401 rotatably connected to the stirring shaft 2 and fixedly connected to the corresponding stirring blades 3, and a top rod 402 is slidably connected inside the rotating shaft 401. When the top rod 402 slides, the top rod 402 drives the rotating shaft 401 to rotate forward or reverse.

[0049] The adjustment component 5 includes an adjustment rod 501 that is slidably connected to the stirring shaft 2. Adjustment grooves 502 are provided at both ends of the adjustment rod 501. When the adjustment rod 501 slides through the adjustment groove 502 and drives the top rod 402 to slide to the shallowest point of the adjustment groove 502, the rotating shaft 401 drives the stirring blade 3 from a vertical state to a horizontal state for shearing concrete. When the top rod 402 slides along the adjustment groove 502, the angle of the stirring blade 3 changes dynamically for turning over concrete in different areas.

[0050] The driving assembly 6 includes a driving block 601 fixedly connected to the cylinder 1 and is used to drive the adjusting rod 501 to slide axially intermittently.

[0051] The transmission assembly 4 includes an auxiliary groove 403 provided on the rotating shaft 401 , a guide groove 404 provided on the inner wall of the auxiliary groove 403 , an insertion rod 405 slidably connected to the guide groove 404 fixed on the top rod 402 , and a first elastic member 406 provided between the auxiliary groove 403 and the top rod 402 .

[0052] The adjustment component 5 includes a receiving groove 503 opened in the stirring shaft 2, the adjustment rod 501 is slidably connected to the receiving groove 503, the top rod 402 is slidably connected to the stirring shaft 2 and the end close to the adjustment rod 501 is in contact with the side wall of the adjustment groove 502, and the axial cross-section of the adjustment groove 502 is gyro-shaped and its side wall is stepped.

[0053] The driving assembly 6 includes a positioning cylinder 602 fixedly connected to the cylinder body 1, the driving block 601 is located in the positioning cylinder 602, and a driving rod 603 is fixed to one end of the adjusting rod 501 close to the driving block 601. The free end of the driving rod 603 is fixedly connected to the driving column 605 through the connecting plate 604, and the free end of the driving column 605 contacts the end face of the driving block 601.

[0054] The connecting plate 604 is slidably connected to the stirring shaft 2 , and one end of the connecting plate 604 away from the driving rod 603 is connected to the stirring shaft 2 via a second elastic member 606 .

[0055] When in use, the stirring shaft 2 drives the stirring blade 3 to rotate through the rotating shaft 401, and the initial state of the stirring blade 3 is a vertical state. Since the upper end surface of the driving block 601 is wavy and the recessed and raised parts are both horizontal planes, and the connecting surface of the recessed and raised parts thereon is an inclined surface, the stirring shaft 2 drives the driving column 605 to move along the upper end surface of the driving block 601 through the connecting plate 604 and the driving rod 603. When the driving column 605 moves from the recessed part of the driving block 601 to the raised part, the driving block 601 drives the driving rod 603 to slide along the stirring shaft 2 toward the positioning cylinder 602 through the driving column 605 and the connecting plate 604. The second elastic member 606 is compressed, so that the driving rod 603 drives the adjusting rod 501 to slide along the accommodating groove 503 toward the positioning cylinder 602. The adjusting rod 501 passes through the stepped upper portion of the adjusting groove 502. The side walls push multiple push rods 402 to slide radially outward along the stirring shaft 2, and the first elastic member 406 is compressed. Since the guide groove 404 on the side wall of the auxiliary groove 403 on the rotating shaft 401 is arc-shaped and spiral, the push rod 402 slides radially outward through the insertion rod 405 and the guide groove 404 to drive the rotating shaft 401 to rotate along the stirring shaft 2, and the rotating shaft 401 drives the stirring blades 3 to rotate a certain angle to stir and mix the concrete slurry, and the rotation directions of the guide grooves 404 on the upper and lower groups of rotating shafts 401 are different, so that the upper and lower groups of stirring blades 3 can rotate relative to or opposite to each other in the clockwise direction. At the same time, the upper and lower groups of stirring blades 3 are staggered, so that in the process of synchronous rotation of the stirring blades 3 along the stirring shaft 2, the multiple stirring blades 3 cooperate to flip and mix the concrete slurry in different areas of the cylinder 1 to ensure that the concrete slurry is fully mixed.

[0056] When the push rod 402 slides to the shallowest part of the adjustment groove 502, since the shallowest part of the adjustment groove 502 is a vertical surface, the push rod 402 slides to the maximum distance along the auxiliary groove 403 on the shaft 401, and the push rod 402 drives the shaft 401 to rotate to the limit position through the insertion rod 405 and the guide groove 404. At this time, the shaft 401 drives the stirring blade 3 from the inclined state to the horizontal state, and the horizontal state of the stirring blade 3 can be maintained for a certain time. The stirring blade 3 in the horizontal state can provide a certain shear force to the concrete in the cylinder 1, thereby separating the large pieces of concrete that have solidified together. The soil is broken up, which not only prevents the concrete from solidifying into large lumps, but also improves the quality of the mixture of concrete and admixtures. When the push rod 402 slides from the shallowest point to the deepest point of the adjusting groove 502, the side wall of the adjusting groove 502 no longer squeezes the push rod 402. At this time, under the action of the first elastic member 406 and the resistance of the concrete slurry, the stirring blade 3 drives the rotating shaft 401 to rotate in the opposite direction, so that the stirring blade 3 swings from a horizontal state to an inclined state, so that the stirring blade 3 again flips the concrete slurry in different areas, so as to facilitate the full mixing of the concrete slurry in different areas.

[0057] When the driving column 605 slides to the protrusion of the driving block 601 and moves at the protrusion, the angles of the multiple inclined stirring blades 3 no longer change, so that the stirring blades 3 continue to flip the concrete slurry in their own area upward or downward under the action of their own inclined angles. When the driving column 605 slides from the protrusion to the depression of the driving block 601, the above movement can be repeated, so that the concrete slurry in different areas is fully mixed under the action of the stirring blades 3, further improving the sufficiency of the mixing of the concrete admixture and the concrete slurry, and improving the performance of the concrete.

[0058] In summary, through the linkage arrangement of the adjusting rod 501, the adjusting slot 502, the top rod 402, the guide slot 404, the insertion rod 405 and the rotating shaft 401, not only can the adjusting slot 502 drive the top rod 402 to slide, but also the guide slot 404 and the insertion rod 405 can drive the rotating shaft 401 to rotate when the top rod 402 slides, so that the angle of the stirring blade 3 changes dynamically, which is convenient for turning and mixing the concrete slurry in different areas. The stirring blade 3 can also be transformed into a horizontal state for a certain period of time under the action of the stepped surface of the adjusting slot 502, so that the horizontal stirring blade 3 can shear and crush the large pieces of concrete that have been condensed together, which is convenient for mixing admixtures with concrete, reduces the problem of poor local performance of concrete, and further ensures the overall performance of concrete.

[0059] Example 3

[0060] During use, it was also found that when adding concrete admixtures for mixing, the concrete admixtures were always added at fixed points, which resulted in low efficiency in mixing the concrete admixtures with the concrete and also caused problems with poor local performance of the concrete. Therefore, further improvements were made based on the above embodiments.

[0061] like Figures 2 to 4 As shown, the quantitative feeding assembly 7 includes a transfer ring 702 fixedly connected to the positioning cylinder 602, the transfer ring 702 is rotatably connected to the stirring shaft 2, a channel 703 connected to the transfer ring 702 is opened in the stirring shaft 2, the channel 703 is connected to the receiving groove 503, the push ring 701 is slidably connected to the receiving groove 503, and the adjusting rod 501 is located between the two push rings 701 and is slidably connected to the push ring 701.

[0062] A storage cylinder 704 is provided on the cylinder body 1 , and the bottom of the storage cylinder 704 is connected to the transfer ring 702 through a conduit 705 . A first one-way valve is provided in the channel 703 for guiding the admixture to flow in one direction toward the containing tank 503 .

[0063] Multiple discharge pipes 706 are provided at both ends of the receiving groove 503. A second one-way valve is provided in the pushing ring 701 away from the channel 703, which is used to guide the additive to flow in one direction toward the discharge pipe 706. A flow limiting tube 707 is fixed on the pushing ring 701 close to the channel 703, and the flow limiting tube 707 can extend into the channel 703.

[0064] During use, since the initial position of the flow limiting tube 707 is located near the channel 703, and the agitator shaft 2 is rotatably connected to the transfer ring 702, the channel 703 can always be connected to the transfer ring 702. At this time, the liquid concrete admixture in the storage cylinder 704 flows into the receiving groove 503 above the push ring 701 through the conduit 705, the transfer ring 702 and the channel 703 under the action of its own gravity. When the adjusting rod 501 slides upward along the receiving groove 503, the adjusting rod 501 drives the push ring 701 to slide in the direction of the channel 703, so that the flow limiting tube 707 is quickly inserted into the channel 703.

[0065] It should be noted that in order to prevent the concrete admixture from being squeezed into the lower receiving groove 503 through the adjusting rod 501 and the pushing ring 701, a first one-way valve is provided in the channel 703 to prevent the liquid in the channel 703 from flowing in reverse.

[0066] The adjusting rod 501 drives the pushing ring 701 to slide upward along the stirring shaft 2, so that the pushing ring 701 close to the channel 703 pushes the concrete admixture in the receiving tank 503 through the discharge pipe 706 to be squeezed into the cylinder 1 and mixed with the concrete slurry. Since the adjusting rod 501 is hollow, the concrete slurry in the storage cylinder 704 flows into the receiving tank 503 below through the flow limiting pipe 707 and the adjusting rod 501.

[0067] When the adjusting rod 501 slides downward along the receiving groove 503, and a second one-way valve is provided on the pushing ring 701 away from the channel 703 to prevent the concrete admixture from flowing back through the adjusting rod 501, so that the adjusting rod 501 drives the pushing ring 701 to squeeze the concrete admixture in the receiving groove 503 below, so that the concrete admixture is quantitatively squeezed out from the discharge pipe 706 below into the cylinder 1. Since a one-way valve is provided on the discharge pipe 706, the concrete slurry is prevented from flowing into the receiving groove 503 from the discharge pipe 706, and the dynamic change of the inclination of the multiple stirring blades 3 and the extruded concrete admixture are fully mixed with the concrete slurry, and the concrete admixture is quantitatively squeezed into different positions of the cylinder 1, and at the same time, with the cooperation of the multiple stirring blades 3, it is fully mixed with the concrete slurry, avoiding the problem of insufficient concrete permeability, and further ensuring the performance of the concrete slurry.

[0068] In summary, through the linkage setting of the push ring 701, the adjusting rod 501 and the discharge pipe 706, during the sliding process of the adjusting rod 501, the concrete admixture can be quantitatively squeezed into different areas of the cylinder 1, and fully mixed with the concrete slurry with the cooperation of the stirring blade 3, thereby avoiding the problem of insufficient permeability of the concrete admixture added at a fixed point, further controlling the ratio of the concrete slurry and the concrete admixture, and improving the performance of the concrete.

[0069] Example 4

[0070] This embodiment also provides a method for quantitatively mixing concrete admixtures, which utilizes a device for quantitatively mixing concrete admixtures for mixing, and includes the following steps:

[0071] S1: Start the driving motor 8 to drive the stirring blade 3 to rotate through the stirring shaft 2 and the rotating shaft 401 to stir the concrete slurry.

[0072] S2: At the same time, the adjusting rod 501 drives the pushing ring 701 to slide, and the liquid admixture at different positions in the containing groove 503 is quantitatively squeezed out through the discharge pipes 706 at different positions into the cylinder 1 to mix with the concrete slurry.

[0073] S3: During the rotation of the stirring shaft 2, the driving component 6 and the adjusting component 5 drive the stirring blade 3 to dynamically adjust the angle, and dynamically flip different areas of the concrete slurry, so that the concrete slurry in different areas is better mixed with the liquid admixture.

[0074] S4: When the stirring blades 3 are transformed from the vertical state to the horizontal state, the stirring blades 3 are made to shear the concrete slurry horizontally, breaking up and separating large pieces of concrete for better mixing with the liquid admixture.

[0075] S5: After the liquid admixture is completely mixed in the concrete slurry, the driving motor 8 is turned off, and then the concrete slurry in the cylinder 1 is squeezed out from the discharge pipe 9 through the discharge mechanism 11.

[0076] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete admixture quantitative mixing device, comprising a cylinder and a stirring shaft, characterized in that: The stirring shaft is rotatably connected to two groups of axially distributed stirring blades, and further comprises: A transmission assembly comprising a plurality of rotating shafts rotatably connected to the stirring shaft and fixed to the stirring blades, wherein a push rod is slidably connected within the rotating shaft, and when the push rod slides, the push rod drives the rotating shaft to rotate forward or reverse; An adjustment assembly includes an adjustment rod slidably connected to the stirring shaft, with adjustment slots formed at both ends of the adjustment rod. When the push rod slides to the shallowest point of the adjustment slot, the stirring blade changes from a vertical position to a horizontal position for shearing concrete. When the push rod slides along the adjustment slot, the angle of the stirring blade changes dynamically for turning the concrete. A driving assembly comprising a driving block fixedly connected to the cylinder body and configured to drive the adjusting rod to intermittent axial sliding; The quantitative feeding assembly includes two pushing rings slidably connected to the stirring shaft and is used to push materials to different areas of the barrel.

2. The concrete admixture quantitative mixing device according to claim 1, characterized in that: The transmission assembly includes an auxiliary groove opened on the rotating shaft, a guide groove is opened on the inner wall of the auxiliary groove, an insertion rod slidably connected to the guide groove is fixed on the push rod, and a first elastic member is provided between the auxiliary groove and the push rod.

3. The concrete admixture quantitative mixing device according to claim 2, characterized in that: The adjustment assembly includes a receiving groove opened in the stirring shaft, the adjustment rod is slidably connected to the receiving groove, the top rod is slidably connected to the stirring shaft and one end close to the adjustment rod is in contact with the side wall of the adjustment groove, the axial cross-section of the adjustment groove is gyro-shaped and its side wall is stepped.

4. The concrete admixture quantitative mixing device according to claim 3, characterized in that: The driving assembly includes a positioning cylinder fixedly connected to the cylinder body, the driving block is located in the positioning cylinder, a driving rod is fixed to one end of the adjusting rod close to the driving block, the free end of the driving rod is fixedly connected to a driving column through a connecting plate, and the free end of the driving column is in contact with the end face of the driving block.

5. The concrete admixture quantitative mixing device according to claim 4, characterized in that: The connecting plate is slidably connected to the stirring shaft, and one end of the connecting plate away from the driving rod is connected to the stirring shaft via a second elastic member.

6. The concrete admixture quantitative mixing device according to claim 5, characterized in that: The quantitative feeding assembly includes a transfer ring fixedly connected to the positioning cylinder, the transfer ring is rotatably connected to the stirring shaft, a channel connected to the transfer ring is opened in the stirring shaft, the channel is connected to the receiving groove, the push ring is slidably connected to the receiving groove, and the adjusting rod is located between the two push rings and is slidably connected to the push rings.

7. The concrete admixture quantitative mixing device according to claim 6, characterized in that: A storage cylinder is provided on the cylinder body, and the bottom of the storage cylinder is communicated with the transfer ring through a conduit.

8. The concrete admixture quantitative mixing device according to claim 7, characterized in that: A plurality of discharge pipes are provided at both ends of the accommodating groove, and a flow limiting pipe is fixed on a pushing ring close to the channel, and the flow limiting pipe can extend into the channel.

9. The concrete admixture quantitative mixing device according to claim 8, characterized in that: A driving motor is fixed on the cylinder, and the output end of the driving motor is fixedly connected to the stirring shaft. A discharge pipe is provided at the bottom of the cylinder, and a valve is provided on the discharge pipe for controlling discharge. A discharge mechanism is provided in the discharge pipe for rapid discharge.

10. A method for quantitatively mixing concrete admixtures, comprising: using the device for quantitatively mixing concrete admixtures according to claim 9, wherein: The following steps are involved: S1: starting the driving motor to drive the stirring blade to rotate through the stirring shaft and the rotating shaft to stir the concrete slurry; S2: At the same time, the adjusting rod drives the push ring to slide, and the liquid admixture at different positions in the containing tank is quantitatively squeezed out through the discharge pipes at different positions into the cylinder to be mixed with the concrete slurry; S3: During the rotation of the stirring shaft, the driving assembly and the adjusting assembly drive the stirring blade to dynamically adjust the angle, and dynamically flip different areas of the concrete slurry, so that the concrete slurry in different areas is better mixed with the liquid admixture; S4: When the stirring blade changes from a vertical state to a horizontal state, the stirring blade is caused to shear the concrete slurry laterally, breaking up and separating large pieces of concrete for better mixing with the liquid admixture; S5: After the liquid admixture is completely mixed in the concrete slurry, the driving motor is turned off, and then the concrete slurry in the cylinder is squeezed out from the discharge pipe through the discharge mechanism.

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