Novel concrete admixture premixing device

Abstract

The utility model discloses a novel concrete admixture premixing device which comprises a supporting frame, a fixing shaft and a mixing drum, the fixing shaft is fixed in the middle of the inner side of the supporting frame, the mixing drum is rotatably connected to the supporting frame through a bearing, a mixing mechanism is arranged in the mixing drum, a reciprocating material shifting mechanism is arranged on the fixing shaft, and the reciprocating material shifting mechanism is arranged on the supporting frame. The reciprocating material stirring mechanism is connected with the stirring mechanism, the stirring mechanism comprises a guide cylinder, a stirring rod and a spiral slide way, the reciprocating material stirring mechanism comprises a sliding cylinder, a stirring piece, a fixing ring and a driving sliding shaft, and a reset spring is arranged between the two ends in the sliding cylinder and the stirring cylinder; the reset spring is arranged between the guide cylinder and the fixed shaft and is coaxial with the fixed shaft, a shaft seal is arranged between the sliding cylinder and the guide cylinder, and the shaft seal is arranged on the guide cylinder and is in sliding connection with the fixed shaft. The utility model belongs to the technical field of concrete premixing, and particularly relates to a novel concrete admixture premixing device.

Description

Technical Field

[0001] This utility model belongs to the field of concrete premixing technology, specifically referring to a new type of concrete admixture premixing device. Background Technology

[0002] Concrete admixtures are substances added to improve and adjust the properties of concrete. By adding concrete admixtures to concrete and mixing them, the rheological properties of the concrete mixture can be improved, the setting time and hardening properties of concrete can be adjusted, and the durability of concrete can be improved.

[0003] Existing concrete admixture premixing devices, such as the novel concrete admixture premixing device disclosed in application number CN202322213493.4, use a mixing drum and a mixing shaft that rotate in opposite directions, combined with spiral blades to lift the material at the bottom of the mixing drum to the top of the mixing drum. This allows the concrete admixture particles and water in the admixture mixing drum to move randomly, improving the dissolution rate and effect of the concrete admixture. It also enables the admixture to be fully and evenly mixed, thereby greatly improving the mixing quality and efficiency of the admixture powder.

[0004] However, in practical use, the existing mixing structure has dead angles between itself and the inner wall of the mixing tank, which prevents the concrete and admixtures from fully contacting the mixing structure, resulting in low mixing efficiency. Furthermore, the existing technology uses an asymmetrical structural design, which means that the rotation speed should not be too high during actual mixing, especially with a material like concrete that has poor fluidity, further reducing the mixing efficiency. Therefore, we propose a new type of premixed concrete admixture device to solve the above problems. Utility Model Content

[0005] In response to the above situation and to overcome the shortcomings of the existing technology, this utility model provides a novel premixing device for concrete admixtures. It effectively solves the problem that there are dead angles in the contact between the existing premixing devices for concrete admixtures and concrete and admixtures, resulting in low mixing efficiency and poor effect. It also solves the problem that the slow rotation speed of the asymmetrical structure further affects the low mixing efficiency when mixing concrete with poor fluidity. At the same time, it solves the problem that the poor fluidity of concrete makes it easy for admixtures to be poorly dispersed between the concrete and the concrete, resulting in poor uniformity.

[0006] The technical solution adopted by this utility model is as follows: The novel concrete admixture premixing device proposed by this utility model includes a support frame, a fixed shaft and a mixing drum. The fixed shaft is fixed in the middle of the inner side of the support frame. The mixing drum is rotatably connected to the support frame through a bearing. A mixing mechanism is provided inside the mixing drum. A reciprocating feeding mechanism is provided on the fixed shaft and is connected to the mixing mechanism.

[0007] As an improvement to this solution, the stirring mechanism includes a guide cylinder, stirring rods, and a spiral slide. The guide cylinder is fixed to the inner wall at both ends of the stirring cylinder and is coaxial with the fixed shaft. The stirring rods are evenly distributed on the side wall of the guide cylinder. The spiral slide is provided in several sets and is fixed to the inner wall of the stirring cylinder along the circumferential direction.

[0008] As an improvement to this solution, the reciprocating feeding mechanism includes a slide cylinder, a paddle, a fixed ring, and a drive slide shaft. The slide cylinder is slidably connected to the fixed shaft and plugged into the guide cylinder. The paddle is evenly distributed on the side wall of the slide cylinder along the circumferential direction. The fixed ring is fixed on the paddle and coaxially arranged with the fixed shaft. The drive slide shaft is fixed on the side wall of the fixed ring and fits against the spiral slide.

[0009] As an improvement to this solution, a return spring is provided between the two ends of the slide and the stirring cylinder. The return spring is located between the guide cylinder and the fixed shaft and is coaxial with the fixed shaft. A shaft seal is provided between the slide and the guide cylinder. The shaft seal is located on the guide cylinder and is slidably connected to the fixed shaft.

[0010] As an improvement to this solution, a fixing rod is fixed to the bottom of the inner side of the support frame, a fixing plate is fixed to the inner wall of the bottom of the support frame, and the fixing plate is located below the stirring cylinder. External gear rings are fixed to the outer walls at both ends of the stirring cylinder. A limit gear is rotatably connected between the fixing rod and the fixing plate, and the external gear ring meshes with the limit gear.

[0011] As an improvement to this solution, a support plate is fixed on the outer wall of the upper middle part of the support frame, and a stirring motor is fixed on the support plate. A fixed guard plate is fixed on the inner side of the upper middle part of the support frame, and a drive gear is rotatably connected to the inner wall of the fixed guard plate. The drive gear is connected to the output shaft of the stirring motor and meshes with the outer gear ring.

[0012] As an improvement to this solution, a feeding port is provided in the middle of the side wall of the mixing drum, and a universal wheel is provided at the bottom of the support frame. A sealing cover is plugged into the feeding port, and latches are provided on both sides of the feeding port. The sealing cover is sealed to the feeding port by the latches.

[0013] As an improvement to this solution, both the guide cylinder and the slide cylinder are hollow cylinders, the fixing ring is O-shaped, and the spiral slide is a spiral thin plate with a rectangular cross-section.

[0014] The beneficial effects of this utility model by adopting the above structure are as follows:

[0015] 1. The horizontally distributed structural design allows the concrete and admixtures inside the mixing drum to flow fully through its own rolling motion, which, combined with the mixing mechanism, improves the mixing efficiency.

[0016] 2. It is equipped with a reciprocating feeding mechanism. Through the spiral slide and drive shaft, the rotation of the mixing drum is used to drive the feeding blades, which can move back and forth along the direction of the fixed shaft axis. This facilitates the flow of concrete and admixtures in various parts of the mixing drum and ensures the uniformity of concrete and admixture mixing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the novel concrete admixture premixing device proposed in this utility model;

[0018] Figure 2 This is a cross-sectional view of the novel premixed concrete admixture device proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the novel concrete admixture premixing device proposed in this utility model;

[0020] Figure 4 This is a partial structural diagram of the stirring mechanism and reciprocating feeding mechanism components inside the mixing drum in this embodiment.

[0021] The components are as follows: 1. Support frame; 2. Fixed shaft; 3. Mixing drum; 4. Bearing; 5. Mixing mechanism; 6. Reciprocating feeding mechanism; 7. Guide cylinder; 8. Mixing rod; 9. Spiral slide; 10. Slide cylinder; 11. Paddle; 12. Fixing ring; 13. Drive slide shaft; 14. Return spring; 15. Shaft seal; 16. Fixing rod; 17. Fixing plate; 18. External gear ring; 19. Limit gear; 20. Support plate; 21. Mixing motor; 22. Fixed guard plate; 23. Drive gear; 24. Feed port; 25. Universal wheel; 26. Sealing cover plate; 27. Lock.

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the novel concrete admixture premixing device proposed in this utility model includes a support frame 1, a fixed shaft 2 and a mixing drum 3. The fixed shaft 2 is fixed in the middle of the inner side of the support frame 1. The mixing drum 3 is rotatably connected to the support frame 1 through a bearing 4. A mixing mechanism 5 is provided inside the mixing drum 3. A reciprocating feeding mechanism 6 is provided on the fixed shaft 2 and is connected to the mixing mechanism 5.

[0025] like Figure 2 and Figure 4 As shown, in order to achieve the mixing of concrete and admixtures, the mixing mechanism 5 includes a guide cylinder 7, a mixing rod 8 and a spiral slide 9. The guide cylinder 7 is fixed on the inner wall at both ends of the mixing cylinder 3 and is coaxial with the fixed shaft 2. The mixing rod 8 is evenly distributed on the side wall of the guide cylinder 7. The spiral slide 9 is provided in several sets and is fixed on the inner wall of the mixing cylinder 3 along the circumferential direction. The spiral slide 9 is a spiral thin plate with a rectangular cross section.

[0026] like Figure 3 and Figure 4 As shown, in order to increase the horizontal flow of concrete and admixtures and improve the mixing effect, the reciprocating material feeding mechanism 6 includes a slide cylinder 10, a paddle 11, a fixing ring 12 and a drive slide shaft 13. The slide cylinder 10 is slidably connected to the fixing shaft 2 and plugged into the guide cylinder 7. Both the guide cylinder 7 and the slide cylinder 10 are hollow cylinders. The paddle 11 is evenly distributed on the side wall of the slide cylinder 10 along the circumference. The fixing ring 12 is fixed on the paddle 11 and is coaxial with the fixing shaft 2. The fixing ring 12 is O-shaped. The drive slide shaft 13 is fixed on the side wall of the fixing ring 12 and fits against the spiral slide 9.

[0027] like Figure 2 and Figure 4 As shown, a return spring 14 is provided between the two ends of the slide cylinder 10 and the stirring cylinder 3. The return spring 14 is located between the guide cylinder 7 and the fixed shaft 2 and is coaxial with the fixed shaft 2. A shaft seal 15 is provided between the slide cylinder 10 and the guide cylinder 7. The shaft seal 15 is located on the guide cylinder 7 and is slidably connected to the fixed shaft 2.

[0028] like Figure 1 and Figure 3 As shown, a fixing rod 16 is fixed to the bottom of the inner side of the support frame 1, a fixing plate 17 is fixed to the inner wall of the bottom of the support frame 1, and the fixing plate 17 is located below the stirring drum 3. External gear rings 18 are fixed to the outer walls at both ends of the stirring drum 3. A limiting gear 19 is rotatably connected between the fixing rod 16 and the fixing plate 17, and the external gear ring 18 meshes with the limiting gear 19.

[0029] like Figure 1As shown, a support plate 20 is fixed on the outer wall of the middle of the upper end of the support frame 1, and a stirring motor 21 is fixed on the support plate 20. A fixed guard plate 22 is fixed on the inner side of the middle of the upper end of the support frame 1. A drive gear 23 is rotatably connected to the inner wall of the fixed guard plate 22. The drive gear 23 is connected to the output shaft of the stirring motor 21 and meshes with the outer gear ring 18.

[0030] like Figure 1 and Figure 3 As shown, a feeding port 24 is provided in the middle of the side wall of the mixing drum 3, and a universal wheel 25 is provided at the bottom of the support frame 1. A sealing cover plate 26 is inserted and pulled on the feeding port 24, and a latch 27 is provided on both sides of the feeding port 24. The sealing cover plate 26 is sealed to the feeding port 24 by the latch 27.

[0031] In practical use, concrete and admixtures are added to the mixing drum 3 through the feeding port 24. Then, the sealing cover 26 is inserted into the feeding port 24 and fixed and sealed using the locking buckles 27 on both sides. The mixing motor 21 is turned on to drive the drive gear 23 to rotate. The external gear ring 18, which meshes with the drive gear 23, drives the mixing drum 3 to rotate around the fixed shaft 2 under the support and limitation of the limiting gear 19. The concrete and admixtures in the mixing drum 3 are continuously tumbling and mixed under the rotation of the mixing drum 3. At the same time, the contact between the spiral slide 9 and the drive shaft 13, under the action of the contour of the spiral slide 9, and the spiral slide 9 and the drive shaft 13, are mixed. The relative rotation between the fixed shafts 2 drives the sliding shaft 13 to move the fixed ring 12 and its paddle 11, which slide along the direction of the guide cylinder 7 through the sliding cylinder 10. After the spiral slide 9 and the fixed ring 12 separate, the return spring 14 is used to reset the sliding cylinder 10 and its components together, so as to realize the horizontal flow of concrete and admixture inside the mixing drum 3, further accelerating the uniform mixing. After the mixing is completed, the feeding port 24 is oriented to the lower sides or directly below, and the locking buckle 27 is opened to discharge the mixed concrete and admixture. The above is the entire usage process of the new concrete admixture premixing device.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A novel premixing device for concrete admixtures, comprising a support frame (1), a fixed shaft (2), and a mixing drum (3), wherein the fixed shaft (2) is fixed to the middle of the inner side of the support frame (1), and the mixing drum (3) is rotatably connected to the support frame (1) via a bearing (4), characterized in that: The mixing drum (3) is provided with a mixing mechanism (5), and the fixed shaft (2) is provided with a reciprocating feeding mechanism (6), and the reciprocating feeding mechanism (6) is connected to the mixing mechanism (5); The stirring mechanism (5) includes a guide cylinder (7), stirring rods (8) and a spiral slide (9). The guide cylinder (7) is fixed on the inner wall at both ends of the stirring cylinder (3) and is coaxial with the fixed shaft (2). The stirring rods (8) are evenly distributed on the side wall of the guide cylinder (7). The spiral slide (9) is provided in several sets and is fixed on the inner wall of the stirring cylinder (3) along the circumferential direction.

2. The novel concrete admixture premixing device according to claim 1, characterized in that: The reciprocating feeding mechanism (6) includes a slide cylinder (10), a paddle (11), a fixing ring (12), and a drive slide shaft (13). The slide cylinder (10) is slidably connected to the fixing shaft (2) and plugged into the guide cylinder (7). The paddle (11) is evenly distributed on the side wall of the slide cylinder (10) along the circumferential direction. The fixing ring (12) is fixed on the paddle (11) and is coaxial with the fixing shaft (2). The drive slide shaft (13) is fixed on the side wall of the fixing ring (12) and fits against the spiral slide (9).

3. The novel concrete admixture premixing device according to claim 2, characterized in that: A return spring (14) is provided between the two ends of the slide cylinder (10) and the stirring cylinder (3). The return spring (14) is located between the guide cylinder (7) and the fixed shaft (2) and is coaxial with the fixed shaft (2). A shaft seal (15) is provided between the slide cylinder (10) and the guide cylinder (7). The shaft seal (15) is located on the guide cylinder (7) and is slidably connected to the fixed shaft (2).

4. The novel concrete admixture premixing device according to claim 3, characterized in that: A fixing rod (16) is fixed to the bottom of the inner side of the support frame (1), and a fixing plate (17) is fixed to the inner wall of the bottom of the support frame (1). The fixing plate (17) is located below the stirring drum (3). An external gear ring (18) is fixed to the outer wall at both ends of the stirring drum (3). A limit gear (19) is rotatably connected between the fixing rod (16) and the fixing plate (17), and the external gear ring (18) meshes with the limit gear (19).

5. The novel concrete admixture premixing device according to claim 4, characterized in that: A support plate (20) is fixed on the outer wall of the middle of the upper end of the support frame (1). A stirring motor (21) is fixed on the support plate (20). A fixing guard plate (22) is fixed on the inner side of the middle of the upper end of the support frame (1). A drive gear (23) is rotatably connected to the inner wall of the fixing guard plate (22). The drive gear (23) is connected to the output shaft of the stirring motor (21) and meshes with the outer gear ring (18).

6. The novel concrete admixture premixing device according to claim 5, characterized in that: The mixing drum (3) has a feeding port (24) in the middle of its side wall. The support frame (1) has casters (25) at its bottom. A sealing cover (26) is inserted and connected to the feeding port (24). Locks (27) are provided on both sides of the feeding port (24), and the sealing cover (26) is sealed to the feeding port (24) by the locks (27).

7. The novel concrete admixture premixing device according to claim 6, characterized in that: The guide cylinder (7) and the slide cylinder (10) are both hollow cylinders, the fixing ring (12) is O-shaped, and the spiral slide (9) is a spiral thin plate with a rectangular cross-section.

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