Premixed concrete admixture homogenizing mechanism

Abstract

The utility model discloses a premixed concrete admixture homogenizing mechanism which comprises a mixing unit, a feeding unit and a liquid adding unit, the feeding unit and the liquid adding unit are communicated with the mixing unit, the feeding unit is used for conveying concrete raw materials into the mixing unit, and the feeding unit comprises a storage bin, a rotating shaft, a spiral blade, a driving part, a scraping plate and a conveying part. The inner diameter of the lower end of the storage bin is reduced, a discharging opening is formed in the lower end of the storage bin, the rotating shaft is rotationally arranged in the storage bin, the lower end of the rotating shaft extends into the discharging opening and is fixedly connected with the spiral blade, the upper end of the rotating shaft is connected with the driving part arranged at the top of the storage bin, and the driving part is used for driving the rotating shaft to rotate. The scraping plate is in contact with the inner side wall and the inner bottom wall of the storage bin, and the conveying piece is connected between the discharge port and the mixing unit. The problem that in the prior art, when concrete raw materials are fed, the concrete raw materials are prone to arching in a storage bin, and consequently the fluidity of the concrete raw materials is reduced is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete homogenization, in particular to a premixed concrete admixture homogenization mechanism. Background Art

[0002] In order to prevent concrete cracking, hydration heat inhibitors are added during the concrete production and mixing process. They can control the hydration reaction rates of different mineral phases in cement, especially reduce the early hydration rate of C3S to achieve the effect of reducing the hydration temperature rise. At present, hydration heat inhibitors have been widely used in many engineering fields and have achieved good economic and social benefits.

[0003] In the prior art, a certain amount of hydration heat inhibitor and a certain amount of concrete raw materials need to be transported to a mixing tank for stirring and mixing. Since the concrete raw materials are prone to arching in the storage bin and the fluidity of the concrete raw materials is poor, the efficiency of the conveying member in transporting the concrete raw materials to the mixing tank is easily reduced. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies and provide a premixed concrete admixture homogenizing mechanism to solve the problem in the prior art that when concrete raw materials are fed, concrete raw materials are prone to arching in the storage bin, resulting in reduced fluidity of the concrete raw materials.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a premixed concrete admixture homogenizing mechanism, comprising a mixing unit, and a feeding unit and a liquid adding unit connected with the mixing unit, wherein the feeding unit is used for conveying concrete raw materials into the mixing unit, the liquid adding unit is used for conveying hydration heat inhibitor into the mixing unit, and the mixing unit is used for stirring the concrete raw materials and the hydration heat inhibitor; the feeding unit comprises a storage bin, a rotating shaft, a spiral blade, a driving member, a scraper and a conveying member, the inner diameter of the lower end of the storage bin is reduced and is provided with a discharge port, the rotating shaft is rotatably arranged in the storage bin, the lower end of the rotating shaft extends into the discharge port and is fixedly connected with the spiral blade, the upper end of the rotating shaft is connected with a driving member arranged on the top of the storage bin, the driving member is used for driving the rotating shaft to rotate, the scraper is connected with the rotating shaft via a connecting rod, and the scraper is in contact with the inner side wall and the inner bottom wall of the storage bin, and the conveying member is connected between the discharge port and the mixing unit.

[0007] In some embodiments, the conveying member includes a horizontal screw conveyor and a vertical screw conveyor, the feed port of the horizontal screw conveyor is connected to the discharge port, the discharge port of the horizontal screw conveyor is connected to the feed port of the vertical screw conveyor, and the discharge port of the vertical screw conveyor is connected to the mixing unit.

[0008] In some embodiments, the mixing unit includes a mixing drum, a rotating shaft, stirring blades and a driving motor. The mixing drum is connected to the discharge port of the vertical screw conveyor, the mixing drum is connected to the liquid adding unit, the driving motor is fixed at the top of the mixing drum, the rotating shaft is disposed in the mixing drum and the upper end is connected to the output end of the driving motor, and a plurality of stirring blades are fixed on the rotating shaft at intervals.

[0009] In some embodiments, a liquid guiding block is provided on the side wall near the top of the mixing barrel, an annular cavity is formed between the liquid guiding block and the inner wall of the mixing barrel, the annular cavity is connected to a liquid inlet pipe provided on the outer wall of the mixing barrel, a plurality of nozzles connected to the annular cavity are provided at intervals on the liquid guiding block, and the plurality of nozzles are all arranged toward the inner wall of the mixing barrel.

[0010] In some embodiments, the liquid adding unit includes a liquid storage tank and a liquid pump. The liquid storage tank contains a hydration heat inhibitor, and the liquid storage tank is connected to the mixing cylinder via the liquid pump.

[0011] In some embodiments, a first flow meter is disposed on the liquid inlet pipe, and a second flow meter is disposed on the pipeline connecting the liquid storage tank and the mixing cylinder.

[0012] In some embodiments, the vertical screw conveyor is fixedly connected to the side wall of the storage bin via at least one connecting member.

[0013] In some embodiments, the inner wall of the mixing barrel is provided with an anti-corrosion coating.

[0014] In some embodiments, the side wall of the mixing cylinder is nested with observation windows along the height direction.

[0015] In some embodiments, the inner diameter of the lower end of the mixing cylinder is reduced, and a control valve is provided on the discharge port at the lower end of the mixing cylinder.

[0016] Compared with the prior art, the utility model provides a premixed concrete admixture homogenizing mechanism, in which the inner diameter of the lower end of the storage bin is reduced and a discharge port is provided, a rotating shaft is rotatably arranged in the storage bin, the lower end of the rotating shaft extends into the discharge port and is fixedly connected to the spiral blade, the upper end of the rotating shaft is connected to a driving member arranged on the top of the storage bin, a scraper is connected to the rotating shaft via a connecting rod, and the scraper is in contact with the inner side wall and the inner bottom wall of the storage bin, a conveying member is connected between the discharge port and the mixing unit, and the rotating shaft is driven to rotate by the driving member, and the scraper rotates with the rotating shaft to break the arch at the arched position, and at the same time, the spiral blade rotates with the rotating shaft to prevent the concrete raw material from blocking the discharge port, which can effectively improve the feeding efficiency of the concrete raw material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a premixed concrete admixture homogenizing mechanism provided by an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the storage bin provided by the embodiment of the utility model;

[0019] Figure 3 is a partial cross-sectional view of a mixing unit provided in an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the connection between the liquid guide block and the nozzle provided in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] In order to solve the technical problem in the prior art that concrete raw materials are prone to arching in a storage bin when being fed, resulting in reduced fluidity of the concrete raw materials, the utility model provides a premixed concrete admixture homogenizing mechanism, which can prevent the concrete raw materials from arching in the storage bin and improve the feeding efficiency of the concrete raw materials.

[0023] See also Figure 1-Figure 4 In one embodiment of the utility model, a premixed concrete admixture homogenizing mechanism comprises a mixing unit 1, and a feeding unit 2 and a liquid adding unit 3 connected to the mixing unit 1, wherein the feeding unit 2 is used to transport concrete raw materials into the mixing unit 1, and the liquid adding unit 3 is used to transport hydration heat inhibitor into the mixing unit 1, and the mixing unit 1 is used to stir the concrete raw materials and the hydration heat inhibitor; the feeding unit 2 comprises a storage bin 21, a rotating shaft 22, a spiral blade 23, a driving member 24, a scraper 25 and a conveying member 2 6. The inner diameter of the lower end of the storage bin 21 is reduced and is provided with a discharge port. The rotating shaft 22 is rotatably arranged in the storage bin 21. The lower end of the rotating shaft 22 extends into the discharge port and is fixedly connected to the spiral blade 23. The upper end of the rotating shaft 22 is connected to a driving member 24 provided on the top of the storage bin 21. The driving member 24 is used to drive the rotating shaft 22 to rotate. The scraper 25 is connected to the rotating shaft 22 via a connecting rod, and the scraper 25 is in contact with the inner side wall and the inner bottom wall of the storage bin 21. The conveying member 26 is connected between the discharge port and the mixing unit 1.

[0024] Please note that Figure 3The mixing unit 1 includes a mixing drum 11, a rotating shaft 12, a stirring blade 13 and a driving motor 14. The mixing drum 11 is connected to the discharge port of the vertical screw conveyor 262, and the mixing drum 11 is connected to the liquid adding unit 3. The driving motor 14 is fixedly mounted on the top of the mixing drum 11. The rotating shaft 12 is arranged in the mixing drum 11 and the upper end is connected to the output end of the driving motor 14. A plurality of stirring blades 13 are fixedly mounted on the rotating shaft 12 at intervals.

[0025] Specifically, the driving motor 14 drives the rotating shaft 12 to rotate around its own axis, and the plurality of stirring blades 13 can stir the concrete raw materials, hydration heat inhibitor and clean water in the mixing drum 11 .

[0026] The inner diameter of the lower end of the mixing cylinder 11 is reduced, and a control valve 111 is provided on the discharge port at the lower end of the mixing cylinder 11 .

[0027] On the basis of the above solution, in order to improve the corrosion resistance of the mixing drum 11, specifically, the inner wall of the mixing drum 11 is provided with an anti-corrosion coating; in addition, the side wall of the mixing drum 11 is nested with an observation window 110 along the height direction. The mixing state of the concrete raw materials, the hydration heat inhibitor and the clean water can be observed through the observation window 110.

[0028] It should be noted that the conveying member 26 is not limited to a specific structure, as long as it can convey the concrete raw materials, and no further details will be given here.

[0029] In this specific embodiment, the conveying member 26 includes a horizontal screw conveyor 261 and a vertical screw conveyor 262. The feed port of the horizontal screw conveyor 261 is connected to the discharge port, the discharge port of the horizontal screw conveyor 261 is connected to the feed port of the vertical screw conveyor 262, and the discharge port of the vertical screw conveyor 262 is connected to the mixing unit 1. It should be noted that the horizontal screw conveyor 261 is arranged in the horizontal direction, and the vertical screw conveyor 262 is arranged in the vertical direction.

[0030] On the basis of the above scheme, in order to facilitate the delivery of clean water into the mixing drum 11 and to clean the inner wall of the mixing drum 11 after the concrete mixing is completed, specifically, a liquid guide block 15 is provided on the side wall near the top of the mixing drum 11, and an annular cavity is formed between the liquid guide block 15 and the inner wall of the mixing drum 11, and the annular cavity is connected to the liquid inlet pipe provided on the outer wall of the mixing drum 11, and a plurality of nozzles 16 connected to the annular cavity are provided on the liquid guide block 15 at intervals, and the plurality of nozzles 16 are all arranged toward the inner wall of the mixing drum 11.

[0031] In this specific embodiment, the liquid adding unit 3 includes a liquid storage tank 31 and a liquid pump 32 . The liquid storage tank 31 contains hydration heat inhibitor, and the liquid storage tank 31 is connected to the mixing barrel 11 via the liquid pump 32 .

[0032] In addition, a first flow meter is provided on the liquid inlet pipe, and a second flow meter is provided on the pipeline connecting the liquid storage tank 31 and the mixing drum 11. It should be noted that a fixed amount of clean water and hydration heat inhibitor can be transported into the mixing drum 11 according to the amount of concrete raw materials. Specifically, the amount of hydration heat inhibitor is generally about 0.5%-2% of the total amount of concrete raw materials.

[0033] In this specific embodiment, the vertical screw conveyor 262 is fixedly connected to the side wall of the storage bin 21 via at least one connecting member 4. It should be noted that the connecting member 4 is a U-shaped seat and a connecting plate, the U-shaped seat is fixedly connected to the vertical screw conveyor 262, one end of the connecting plate is fixedly connected to the U-shaped seat, and the other end of the connecting plate is fixedly connected to the storage bin 21.

[0034] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A premixed concrete admixture homogenizing mechanism, comprising a mixing unit, and a feeding unit and a liquid adding unit connected to the mixing unit, wherein the feeding unit is used to convey concrete raw materials into the mixing unit, the liquid adding unit is used to convey a hydration heat inhibitor into the mixing unit, and the mixing unit is used to stir the concrete raw materials and the hydration heat inhibitor; characterized in that: The loading unit includes a storage bin, a rotating shaft, a spiral blade, a driving member, a scraper and a conveying member. The inner diameter of the lower end of the storage bin is reduced and is provided with a discharge port. The rotating shaft is rotatably arranged in the storage bin, the lower end of the rotating shaft extends into the discharge port and is fixedly connected to the spiral blade, the upper end of the rotating shaft is connected to the driving member provided on the top of the storage bin, the driving member is used to drive the rotating shaft to rotate, the scraper is connected to the rotating shaft via a connecting rod, and the scraper is in contact with the inner side wall and the inner bottom wall of the storage bin, and the conveying member is connected between the discharge port and the mixing unit.

2. A ready-mixed concrete admixture homogenizing mechanism according to claim 1, characterized in that: The conveying member includes a horizontal screw conveyor and a vertical screw conveyor, the feed port of the horizontal screw conveyor is connected to the discharge port, the discharge port of the horizontal screw conveyor is connected to the feed port of the vertical screw conveyor, and the discharge port of the vertical screw conveyor is connected to the mixing unit.

3. A ready-mixed concrete admixture homogenizing mechanism according to claim 2, characterized in that: The mixing unit includes a mixing drum, a rotating shaft, stirring blades and a driving motor. The mixing drum is connected to the discharge port of the vertical screw conveyor, the mixing drum is connected to the liquid adding unit, the driving motor is fixedly arranged on the top of the mixing drum, the rotating shaft is arranged in the mixing drum and the upper end is connected to the output end of the driving motor, and a plurality of stirring blades are fixedly arranged on the rotating shaft at intervals.

4. A ready-mixed concrete admixture homogenizing mechanism according to claim 3, characterized in that: A liquid guide block is provided on the side wall of the mixing cylinder near the top, and an annular cavity is formed between the liquid guide block and the inner wall of the mixing cylinder. The annular cavity is connected to a liquid inlet pipe provided on the outer wall of the mixing cylinder. A plurality of nozzles connected to the annular cavity are provided at intervals on the liquid guide block, and the plurality of nozzles are all arranged toward the inner wall of the mixing cylinder.

5. A ready-mixed concrete admixture homogenizing mechanism according to claim 4, characterized in that: The liquid adding unit comprises a liquid storage tank and a liquid pump. The liquid storage tank contains a hydration heat inhibitor, and the liquid storage tank is connected to the mixing cylinder via the liquid pump.

6. A ready-mixed concrete admixture homogenizing mechanism according to claim 5, characterized in that: The liquid inlet pipe is provided with a first flow meter, and the pipeline connecting the liquid storage tank and the mixing cylinder is provided with a second flow meter.

7. A ready-mixed concrete admixture homogenizing mechanism according to claim 3, characterized in that: The vertical screw conveyor is fixedly connected to the side wall of the storage bin via at least one connecting piece.

8. A ready-mixed concrete admixture homogenizing mechanism according to claim 3, characterized in that: The inner wall of the mixing cylinder is provided with an anti-corrosion coating.

9. A ready-mixed concrete admixture homogenizing mechanism according to claim 3, characterized in that: The side wall of the mixing cylinder is nested with an observation window along the height direction.

10. A ready-mixed concrete admixture homogenizing mechanism according to claim 3, characterized in that: The inner diameter of the lower end of the mixing cylinder is reduced, and a control valve is arranged on the discharge port at the lower end of the mixing cylinder.

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