Dry mortar zero gravity mixer spindle

Abstract

The utility model discloses a dry mortar zero-gravity mixer main shaft, comprising a stirring shaft, on which a plurality of stirring units are staggeredly arranged along the axial direction, each stirring unit comprising two stirring components evenly distributed radially relative to the stirring shaft; the stirring component comprising a stirring arm flange fixed on the stirring shaft, a stirring arm detachably mounted on the stirring arm flange and extending outwardly along the radial direction of the stirring shaft, a fixed stirring blade fixed at the end of the stirring arm, and an adjustable stirring blade detachably mounted on the fixed stirring blade; the stirring arm comprises a flange connection and a retractable rod; the flange connection is arranged in a semicircular shape and is sleeved on the outer periphery of the stirring shaft; the retractable rod is retracted outwardly from the flange connection; the stirring arm in the main shaft should have the characteristics of high connection strength, not easy to break, and can be disassembled and replaced separately, the stirring blade should have the characteristics of adjustable position, and the entire main shaft structure has good stirring effect and high efficiency, and can adapt to different application fields.

Description

Technical Field

[0001] The utility model relates to the field of dry mortar zero-gravity mixers, in particular to a main shaft of a dry mortar zero-gravity mixer. Background Art

[0002] Dry mortar refers to a granular or powdered material that is physically mixed in a certain proportion of dried and sieved aggregates (such as quartz sand), inorganic cementitious materials (such as cement) and additives (such as polymers). It is transported to the construction site in bags or bulk and can be used directly after adding water and mixing. It is also called mortar dry powder, dry mix, and dry mix powder. Some construction adhesives also belong to this category. Dry mortar plays a bonding, cushioning, protective and decorative role in the construction industry in a thin layer. It is widely used in construction and decoration projects. In the production process of dry mortar, a mixer is needed to mix the raw materials.

[0003] In traditional dry mortar zero-gravity mixers, the stirring arms are mostly made of round steel directly drilled and welded to the stirring shaft, which is not convenient to install and cannot be replaced separately. In addition, the connection strength at the welding point is not high and is easy to break. Once the stirring arm is damaged, the entire main shaft needs to be taken out for repair or replacement, which seriously affects production efficiency. In addition, the stirring blade is fixed on the stirring arm, and the stirring blade is perpendicular to the rotation direction of the stirring arm. On the one hand, this structure cannot adjust the gap between the stirring blade and the stirring cylinder body, and can only be used in working occasions with specific materials. On the other hand, the material exerts a vertical force on the stirring blade, causing the stirring arm to be subjected to a large shear stress in a single direction, which not only easily causes the stirring arm to break, but also increases the energy consumption of the equipment. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a main shaft of a dry mortar gravity-free mixer. The stirring arm in the main shaft should have the characteristics of high connection strength, not easy to break, and can be disassembled and replaced separately. The stirring blades should have the characteristics of adjustable position, and the stirring effect of the entire main shaft is good and the efficiency is high, and it can adapt to different application fields.

[0005] The technical solution adopted by the utility model is:

[0006] The main shaft of the dry mortar zero-gravity mixer comprises a stirring shaft, on which a plurality of stirring units are staggered along the axial direction, and each stirring unit comprises two stirring assemblies evenly distributed radially relative to the stirring shaft; the characteristic is that the stirring assembly comprises a stirring arm flange fixed on the stirring shaft, a stirring arm detachably mounted on the stirring arm flange and extending outwardly in the radial direction of the stirring shaft, a fixed stirring blade fixed at the end of the stirring arm, and an adjustable stirring blade detachably mounted on the fixed stirring blade;

[0007] The stirring arm includes a flange connection and a retractable rod; the flange connection is arranged in a semicircular shape and is sleeved on the outer periphery of the stirring shaft; the retractable rod retracts outward from the flange connection; the retractable rod includes an outer end face, a first side face, a second side face and a third side face; the outer end face is parallel to the axis direction of the stirring shaft; the first side face extends from the outer end face to the flange connection and is tangent to the outer edge of the flange connection; the second side face extends from the outer end face of the retractable rod to the middle of the retractable rod; the second side face is perpendicular to the outer end face and has an angle of less than 90° with the axis of the stirring shaft; the third side face extends from an end of the second side face located in the middle of the retractable rod to the flange connection and is tangent to the outer edge of the flange connection.

[0008] The fixed stirring blade is fixed on the second side surface of the stirring arm; the fixed stirring blade is arranged in a fan shape; the fixed stirring blade includes an integrally formed stirring blade body and a stirring blade handle; the outer end surface of the stirring blade body is arranged to be a first arc surface; the two sides of the stirring blade handle respectively transition with the arcs on both sides of the stirring blade body to form a second arc surface.

[0009] The outer end surface of the adjustable stirring blade is configured as a third arc surface; the first arc surface and the third arc surface have the same curvature.

[0010] The fixed stirring blade and the adjustable stirring blade are fixedly connected by a threaded part; a waist-shaped hole is provided on the fixed stirring blade, and the length direction of the waist-shaped hole is arranged along the extension direction of the stirring arm; a threaded hole is provided on the adjustable stirring blade; the threaded part passes through the waist-shaped hole and the threaded hole respectively; when the threaded part is installed on the side of the waist-shaped hole away from the stirring shaft, the outer end surface of the adjustable stirring blade protrudes from the outer end surface of the fixed stirring blade.

[0011] The stirring shafts are arranged as at least two stirring shafts parallel to each other; the stirring units on adjacent stirring shafts are arranged in a staggered manner.

[0012] The stirring arm flange and the stirring shaft, and the fixed stirring blade and the stirring arm are fixed by welding.

[0013] The threaded member is a countersunk bolt.

[0014] The fixed stirring blades and the adjustable stirring blades are both made of wear-resistant steel.

[0015] The beneficial effects of the utility model are:

[0016] (1) The utility model welds a stirring arm flange on the stirring shaft of the mixer, and the stirring arm and the stirring arm flange are detachably connected, so that each stirring arm can be replaced individually, which is beneficial to improving the installation and maintenance efficiency of the stirring arm.

[0017] (2) The stirring arm is configured to be special-shaped, including a flange connection and a retractable rod, wherein the flange connection of the stirring arm is configured to be semicircular and sleeved on the outer circumference of the stirring shaft. Compared with the traditional round steel arm, the contact area between the stirring arm and the stirring shaft is larger and the connection strength is higher, so that the stirring arm is not easy to break during operation. In addition, the retractable rod is configured to be in a retracted shape, which can effectively disperse external stress and reduce stress concentration, thereby further improving the structural strength of the stirring arm and being able to adapt to working environments with high stirring intensity.

[0018] (3) Since the second side surface of the stirring arm is perpendicular to the outer end surface of the stirring arm and the included angle with the axis of the stirring shaft is less than 90°, the outer end surface is parallel to the axis direction of the stirring shaft, and the fixed stirring blade is fixed on the second side surface, there is a certain angle between the fixed stirring blade and the rotation direction of the stirring arm. On the one hand, it can reduce the shear stress on the stirring arm, effectively avoid the situation where the stirring arm breaks due to excessive force, and reduce the energy consumption of the equipment. On the other hand, during the stirring process, it can better push and flip the material outward, thereby improving the stirring efficiency.

[0019] (4) A waist-shaped hole is provided on the fixed stirring blade, and the installation position of the adjustable stirring blade can be adjusted as needed, thereby adjusting the gap between the adjustable stirring blade and the stirring cylinder body, thereby improving the application field. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of a single main axis.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the stirring component.

[0022] Figure 3 It is a schematic diagram of the main structure of the stirring arm.

[0023] Figure 4 It is a schematic diagram of the main structure of the fixed stirring blade.

[0024] Figure 5 It is a schematic diagram of the main structure of the adjustable stirring blade.

[0025] Figure 6 This is a schematic diagram of the main structure of the two main shafts installed in coordination.

[0026] Figure Number:

[0027] 1. Stirring shaft; 2. Stirring assembly; 3. Stirring arm flange;

[0028] 4. stirring arm; 4-1. flange connection; 4-2. retractable rod; 4-2-1. outer end surface; 4-2-2. first side surface; 4-2-3. second side surface; 4-2-4. third side surface;

[0029] 5. Fixed stirring blade; 5-1. Main body of stirring blade; 5-2. Stem of stirring blade; 5-3. First arc surface; 5-4. Second arc surface; 5-5. Waist-shaped hole;

[0030] 6. Adjustable stirring blade; 6-1. Thread hole; 6-2. Threaded part; 6-3. Third arc surface. DETAILED DESCRIPTION

[0031] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0032] In traditional dry mortar gravity-free mixers, the stirring arm is made of round steel arms directly welded to the stirring shaft, which is inconvenient to install and replace, and the connection strength at the welding point is not high and is easy to break. In addition, the stirring blade is fixed on the stirring arm, and the blade surface of the stirring blade is perpendicular to the rotation direction of the stirring arm. On the one hand, the gap between the stirring blade and the stirring cylinder cannot be adjusted, and it can only be used in working occasions where specific materials are stirred. On the other hand, during the stirring process of the material, the stirring arm is subjected to shear stress in a single direction, which is easy to break and increases the energy consumption of the equipment. Therefore, it is necessary to improve the overall structure of the existing main shaft.

[0033] like Figure 1 The main shaft of the dry mortar zero-gravity mixer shown comprises a mixing shaft 1 and a plurality of mixing units. The mixing shaft 1 is provided with a plurality of mixing units staggered along the axial direction, each mixing unit comprising two mixing components 2, and the two mixing components 2 are evenly distributed radially relative to the mixing shaft.

[0034] like Figure 2 As shown, the stirring assembly 2 includes a stirring arm flange 3, a stirring arm 4, a fixed stirring blade 5 and an adjustable stirring blade 6. The stirring arm flange 3 is fixed to the stirring shaft 1 by welding; one end of the stirring arm 4 is detachably connected to the stirring arm flange 3 by bolts, and the other end extends outward along the radial direction of the stirring shaft 1, which is convenient for replacing each stirring arm 4 separately, and is conducive to improving the installation and maintenance efficiency of the stirring arm 4. In this embodiment, two stirring arms 4 are installed on one stirring arm flange 3.

[0035] like Figure 3As shown, the stirring arm 4 is configured as a plate-like structure, and the plate surface of the stirring arm 4 is perpendicular to the axial direction of the stirring shaft. The stirring arm 4 is Y-shaped as a whole, including a flange connection portion 4-1 and a retractable rod 4-2; preferably, the flange connection portion 4-1 and the retractable rod 4-2 are integrally formed. The flange connection portion 4-1 is configured in a semicircular shape and is sleeved on the outer periphery of the stirring shaft 1, and the flange connection portion 4-1 is fixedly connected to the stirring arm flange 3 by bolts; compared with the traditional round steel arm, the stirring arm 4 has a larger contact area with the stirring shaft 1 and a higher connection strength, so that the stirring arm 4 is not easy to break during operation. The retractable rod 4-2 is retracted outward from the flange connection portion 4-1 to effectively disperse external stress, reduce stress concentration, and further improve the structural strength of the stirring arm 4.

[0036] In this embodiment, the retractable rod includes an outer end face 4-2-1, a first side face 4-2-2, a second side face 4-2-3 and a third side face 4-2-4. The outer end face 4-2-1 is parallel to the axial direction of the stirring shaft 1. The first side face 4-2-2 extends from the outer end face 4-2-1 to the flange connection part 4-1 and is tangent to the outer edge of the flange connection part 4-1. The second side face 4-2-2 extends from the outer end face 4-2-1 of the retractable rod to the middle of the retractable rod 4-2; the second side face 4-2-3 is perpendicular to the outer end face 4-2-1 and has an angle of less than 90° with the axis of the stirring shaft 1. The third side face 4-2-4 extends from one end of the second side face located in the middle of the retractable rod 4-2 to the flange connection part 4-1 and is tangent to the outer edge of the flange connection part 4-1.

[0037] like Figure 4 As shown, the fixed stirring blade 5 is fixed to the end of the stirring arm 4 by welding; in this embodiment, the fixed stirring blade 5 is fixed on the second side surface 4-2-3 of the stirring arm, so that there is a certain angle between the fixed stirring blade 5 and the rotation direction of the stirring arm 4. On the one hand, it can reduce the shear stress on the stirring arm 4 and effectively avoid the situation where the stirring arm 4 breaks due to excessive force. On the other hand, during the stirring process, the material can be better pushed and turned outward, thereby improving the material stirring efficiency. The fixed stirring blade 5 is arranged in a fan shape, which can better disperse the material during the stirring process. The fixed stirring blade 5 includes an integrally formed stirring blade main body 5-1 and a stirring blade handle 5-2; the outer end surface of the stirring blade main body 5-1 is arranged as a first arc surface 5-3; the two sides of the stirring blade handle and the two sides of the stirring blade main body are respectively arc-transitioned to form a second arc surface 5-4.

[0038] like Figure 5As shown, the adjustable stirring blade 6 is installed on the fixed stirring blade 5; specifically, the adjustable stirring blade 6 is detachably connected to the fixed stirring blade 5 through a threaded member 6-2; wherein, a threaded hole 6-1 is provided on the adjustable stirring blade, and a waist-shaped hole 5-5 is provided on the fixed stirring blade, and the length direction of the waist-shaped hole 5-5 is arranged along the extension direction of the stirring arm 4; the threaded member 6-2 passes through the waist-shaped hole 5-5 and the threaded hole 6-1 respectively. Preferably, the threaded member 6-2 adopts a countersunk bolt, which can reduce the collision between the threaded member 6-2 and the material and reduce the risk of damage or wear of the threaded member 6-2. The fixed stirring blade 5 and the adjustable stirring blade 6 are both made of wear-resistant steel to reduce the wear of the fixed stirring blade 5 and the adjustable stirring blade 6 and extend the service life.

[0039] When installing the adjustable stirring blade 6, the installation position of the adjustable stirring blade 6 can be adjusted as needed, so as to adjust the gap between the adjustable stirring blade 6 and the stirring cylinder body, thereby improving the application field of the mixer. Obviously, when the threaded member 6-2 is installed on the side of the waist-shaped hole 5-5 away from the stirring shaft 1, the outer end face of the adjustable stirring blade 6 protrudes from the outer end face of the fixed stirring blade to ensure that the distance between the outer end face of the adjustable stirring blade 6 and the stirring cylinder body is adjustable. The outer end face of the adjustable stirring blade 6 is set to a third arc surface 6-3; preferably, the first arc surface 5-3 has the same curvature as the third arc surface 6-3.

[0040] like Figure 6 As shown, the number of main shafts can be set to two or more (two main shafts in the figure), and the two main shafts stir the materials at the same time, which can make the mixing effect more uniform, avoid the situation of local uneven mixing, and improve the stirring efficiency. The stirring shafts 1 are parallel to each other, and the stirring units on adjacent stirring shafts are staggered to ensure that the two main shafts do not collide with each other during the material stirring process. When in use, the adjacent main shafts turn in opposite directions, which can produce a convection effect during the stirring process, so that the materials are evenly mixed, thereby achieving the purpose of stirring the materials.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A main shaft of a dry mortar zero-gravity mixer, comprising a stirring shaft (1), wherein a plurality of stirring units are staggeredly arranged along the axial direction on the stirring shaft (1), and each stirring unit comprises two stirring assemblies (2) uniformly distributed radially relative to the stirring shaft; characterized in that: The stirring assembly (2) comprises a stirring arm flange (3) fixed on the stirring shaft (1), a stirring arm (4) detachably mounted on the stirring arm flange (3) and extending outwardly in the radial direction of the stirring shaft, a fixed stirring blade (5) fixed at the end of the stirring arm (4), and an adjustable stirring blade (6) detachably mounted on the fixed stirring blade; The stirring arm (4) comprises a flange connection portion (4-1) and a retractable rod (4-2); the flange connection portion (4-1) is arranged in a semicircular shape and is sleeved on the outer periphery of the stirring shaft (1); the retractable rod (4-2) is retracted outward from the flange connection portion (4-1); the retractable rod (4-2) comprises an outer end surface (4-2-1), a first side surface (4-2-2), a second side surface (4-2-3) and a third side surface (4-2-4); the outer end surface (4-2-1) is parallel to the axial direction of the stirring shaft (1); the first side surface (4-2-2) is The outer end surface (4-2-1) extends to the flange connection part (4-1) and is tangent to the outer edge of the flange connection part (4-1); the second side surface (4-2-3) extends from the outer end surface (4-2-1) of the retractable rod to the middle of the retractable rod; the second side surface (4-2-3) is perpendicular to the outer end surface (4-2-1) and forms an angle with the axis of the stirring shaft (1) of less than 90°; the third side surface (4-2-4) extends from one end of the second side surface (4-2-3) located in the middle of the retractable rod to the flange connection part (4-1) and is tangent to the outer edge of the flange connection part (4-1).

2. The main shaft of the dry mortar zero-gravity mixer according to claim 1 is characterized in that: The fixed stirring blade (5) is fixed on the second side surface (4-2-3) of the stirring arm (4); the fixed stirring blade (5) is arranged in a fan shape; the fixed stirring blade (5) comprises an integrally formed stirring blade body (5-1) and a stirring blade handle (5-2); the outer end surface of the stirring blade body (5-1) is arranged as a first arc surface (5-3); the two sides of the stirring blade handle (5-2) respectively transition to the arcs on the two sides of the stirring blade body to form a second arc surface (5-4).

3. The main shaft of the dry mortar zero-gravity mixer according to claim 2 is characterized in that: The outer end surface of the adjustable stirring blade (6) is configured as a third arc surface (6-3); the first arc surface (5-3) and the third arc surface (6-3) have the same curvature.

4. The main shaft of the dry mortar zero-gravity mixer according to claim 1 is characterized in that: The fixed stirring blade (5) and the adjustable stirring blade (6) are fixedly connected via a threaded member (6-2); a waist-shaped hole (5-5) is provided on the fixed stirring blade (5), and the length direction of the waist-shaped hole (5-5) is arranged along the extension direction of the stirring arm (4); a threaded hole (6-1) is provided on the adjustable stirring blade (6); the threaded member (6-2) passes through the waist-shaped hole (5-5) and the threaded hole (6-1) respectively; when the threaded member (6-2) is installed on the side of the waist-shaped hole (5-5) away from the stirring shaft (1), the outer end surface of the adjustable stirring blade (6) protrudes from the outer end surface of the fixed stirring blade (5).

5. The main shaft of the dry mortar zero-gravity mixer according to claim 1 is characterized by: The stirring shafts (1) are arranged as at least two stirring shafts parallel to each other; the stirring units on adjacent stirring shafts are arranged in a staggered manner.

6. The main shaft of the dry mortar zero-gravity mixer according to claim 1 is characterized by: The stirring arm flange (3) and the stirring shaft (1), as well as the fixed stirring blade (5) and the stirring arm (4) are fixed by welding.

7. The main shaft of the dry mortar zero-gravity mixer according to claim 4 is characterized by: The threaded member (6-2) is a countersunk bolt.

8. The main shaft of the dry mortar zero-gravity mixer according to claim 1 is characterized by: The fixed stirring blades and the adjustable stirring blades are both made of wear-resistant steel.

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