Multi-stage mixing device for diaphragm wall construction

Abstract

This utility model discloses a multi-stage mixing device for diaphragm wall construction, comprising multiple mixing power heads fixed to a fixed cylinder for connection with a piling machine. Each mixing power head includes a support housing connected to the fixed cylinder, on which a hydraulic motor is mounted. The bottom end of the hydraulic motor's output shaft has a small-diameter active bevel gear, and a large-diameter passive bevel gear meshing with the small-diameter active bevel gear is coaxially fixed to a rotating shaft. Both ends of the rotating shaft are rotatably fitted within the support housing, and both ends are coaxially fixed to two symmetrically arranged cutterheads. Each cutterhead has multiple mixing blades on its outer circumference. Preferably, there are four mixing power heads. Each support housing consists of two symmetrically arranged halves, which are connected and fixed to each other by a pair of flanges and multiple bolts and nuts. This multi-stage mixing device has a relatively compact and simple structure, is easy to assemble and disassemble, and has high construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm wall construction technology, specifically a multi-stage mixing device for diaphragm wall construction. Background Technology

[0002] Double-wheel agitators used in the construction of diaphragm walls, or in the construction of anti-seepage walls or in the construction of water-stop curtains, come in a wide variety of types and have different structures.

[0003] Among the technical solutions that use bevel gears, some use sprockets, chains, pulleys, and belt drives, some use planetary gear drives, and some use multiple sets of gear drives.

[0004] However, in comparison, the existing twin-wheel milling devices used for diaphragm wall construction generally only have two mixing wheels, i.e. two mixing power heads. Their construction efficiency and mixing quality need to be improved. They also have shortcomings such as relatively loose and complex structure and inconvenient assembly and disassembly. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a multi-stage mixing device for the construction of underground continuous walls that has a relatively compact and simple structure.

[0006] The technical solution of this utility model is to provide a multi-stage mixing device for the construction of underground continuous walls, including multiple mixing power heads, which are fixed on a fixed cylinder for connection with a pile driver; each mixing power head includes a support shell connected to the fixed cylinder, and a hydraulic motor is installed on the support shell; a small-diameter active bevel gear is located at the bottom of the output shaft of the hydraulic motor, and a large-diameter passive bevel gear meshing with the small-diameter active bevel gear is coaxially fixed with a rotating shaft, the two ends of the rotating shaft are rotatably fitted inside the support shell, and the two ends of the rotating shaft are coaxially fixed with two symmetrically arranged cutter discs, and multiple mixing blades are provided on the outer circumference of each cutter disc.

[0007] With the above structure, the multi-wheel mixing device for diaphragm wall construction of this utility model has the following advantages: Since the output shaft of the hydraulic motor directly drives the rotating shaft through a pair of bevel gears, the two ends of the rotating shaft directly drive the two outer ends of the cutter disc with multiple mixing blades to rotate to construct the diaphragm wall. The structure is relatively compact, and the volume of the diaphragm wall of the same width is reduced, and the structure is relatively simple.

[0008] Furthermore, the multiple stirring heads are four in number; the first fixed cylinder includes a vertical first large cylinder, a fan-shaped first transition cylinder, and four first small cylinders. The top of the fan-shaped first transition cylinder is fixed to the bottom of the first large cylinder, and the bottom of the fan-shaped first transition cylinder is fixed to the top of the four first small cylinders. The four first small cylinders are at an angle to each other. The bottom of each first small cylinder is fixed to the top of the support shell of each stirring head by a pair of first flanges and multiple bolts and nuts. With the above structure, the construction efficiency of the diaphragm wall is greatly improved because the four stirring heads are operating simultaneously. The compact structure and the angled arrangement of the four first small cylinders are particularly prominent. Furthermore, the assembly and disassembly of each stirring head and the fixed cylinder are convenient.

[0009] Furthermore, the multiple stirring heads are four in number; the second fixed cylinder includes a vertical second large cylinder, a horizontal rectangular second transition cylinder, and four first small cylinders. The top of the horizontal rectangular second transition cylinder is fixed to the bottom of the second large cylinder at its midpoint, and the bottom of the horizontal rectangular second transition cylinder is fixed to the top of the four second small cylinders. The four second small cylinders are parallel to each other. The bottom of each second small cylinder is fixed to the top of the support shell of each stirring head via a pair of third flanges and multiple bolts and nuts. With the above structure, the construction efficiency is greatly improved because the four stirring heads operate simultaneously. Furthermore, the manufacturing process is relatively simple and convenient because the four first small cylinders are parallel to each other. The assembly and disassembly of each stirring head and the fixed cylinder are also convenient.

[0010] Furthermore, the multiple stirring heads are actually two; the third fixed cylinder includes a vertical third large cylinder and two third small cylinders whose lower ends form an angle with each other. The top ends of the two third small cylinders are fixed to the bottom end of the third large cylinder, and the bottom end of each third small cylinder is fixed to the top end of the support shell of each stirring head via a pair of fourth flanges and multiple bolts and nuts. This structure ensures both a compact design for the two stirring heads and facilitates easier assembly and disassembly of each stirring head from the fixed cylinder.

[0011] Furthermore, the thickness bisectors of the multiple mixing heads lie on the same straight line; among the multiple mixing heads, the rotation directions of the pair of cutterheads of each of two adjacent mixing heads are opposite. With the above structure, the mixing in diaphragm wall construction, including deep-layer construction, is more uniform, the mixing effect is better, and the construction quality of the diaphragm wall is more guaranteed.

[0012] Furthermore, each support shell consists of two symmetrically arranged halves, which are connected and secured to each other by a pair of second flanges and multiple bolts and nuts. This structure facilitates both assembly and disassembly.

[0013] Furthermore, a bushing retainer is fitted inside the central hole of each half-support housing. Within the bushing retainer is a bushing that rotatably engages with one end of the rotating shaft. The bushing retainer is fixed to the half-support housing by multiple first screws. A bushing clamping ring is located at the outer end of the bushing, and this clamping ring is fixed to the outer end of the bushing retainer by multiple second screws. This structure effectively ensures the concentricity of the driven gear and the rotating shaft, resulting in flexible, stable, and reliable operation, and facilitating assembly and disassembly.

[0014] Furthermore, a regular hexagonal protrusion is fixed to the inner side of the end plate of each cutter head, and a set of regular hexagonal grooves that fit the regular hexagonal protrusions are located at each end of the rotating shaft. A threaded blind hole, coaxial with the large-diameter driven bevel gear, is located on the bottom wall of the regular hexagonal groove. A screw through-hole, coaxial with the threaded blind hole, is located at the center of the end plate and the center of the regular hexagonal protrusion of each cutter head. A third screw secures the cutter head to the rotating shaft. This structure effectively ensures the concentricity and connection strength between the rotating shaft and the cutter head, making operation more flexible, stable, and reliable, and facilitating assembly and disassembly.

[0015] Furthermore, each end of the rotating shaft has a rolling bearing between it and the supporting housing; the output shaft has a rolling bearing between it and the supporting housing. This structure further ensures the concentricity of the rotating shaft and the cutter head, as well as the flexibility, stability, and reliability of its operation. It also further ensures the flexibility, stability, and reliability of the meshing transmission between the driving and driven bevel gears.

[0016] Furthermore, the multiple mixing heads have identical structures; the shape and number of mixing blades on each pair of cutterheads in the multiple mixing heads are also identical: each cutterhead includes multiple fixed mixing blades, all positioned along the outer edge of the cutterhead; each fixed mixing blade is triangular, wider near the cutterhead and narrower further away, with its outer tip cut off to maintain a flat surface. This structure results in stronger mixing blades, a longer service life, more uniform mixing, and better mixing effect, further ensuring the construction quality of the diaphragm wall. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the multi-wheel stirring device of this utility model. Figures 1-8 (Bolts, nuts, and screws are not shown).

[0018] Figure 2 yes Figure 1 A schematic diagram of the explosion structure of the first fixed cylinder.

[0019] Figure 3 This is a schematic diagram of the structure of the second embodiment of the multi-stage stirring device of this utility model.

[0020] Figure 4 yes Figure 3 A schematic diagram of the explosion structure in which the second fixed cylinder is ejected.

[0021] Figure 5 This is a structural schematic diagram of the third embodiment of the multi-stage stirring device of this utility model.

[0022] Figure 6 yes Figure 5 A schematic diagram of the explosion structure in which the third fixed cylinder is ejected.

[0023] Figure 7 yes Figures 1-6 An exploded structural diagram of any one of the stirring heads in the diagram.

[0024] Figure 8 yes Figure 7 The second component from the left in the middle is a semi-support housing with gears and shafts installed after omitting the blade and stirring blade, and an enlarged structural diagram after being rotated by about 90° (and showing the second bearing and half of the pressure ring in the third component).

[0025] As shown in the figure:

[0026] 1. First fixed cylinder; 11. First large cylinder; 12. First small cylinder; 13. First transition cylinder;

[0027] 2. Stirring power head; 21. Support housing; 211. Semi-support housing; 22. Hydraulic motor; 221. Output shaft; 23. Small diameter active bevel gear; 24. Large diameter passive bevel gear; 25. Cutter disc; 251. End plate; 2511. Regular hexagonal protrusion; 25111. Screw through hole; 26. Bushing fixing body; 27. Bushing; 28. Bushing clamping ring; 291. First rolling bearing; 292. Second rolling bearing; 210. Fixed stirring blade; 2101. Plane; 211. Oscillating stirring blade; 212. Rotating shaft; 2121. Threaded blind hole;

[0028] 3. Second fixed cylinder; 31. Second large cylinder; 32. Second small cylinder; 33. Second transition cylinder;

[0029] 4. Third fixed cylinder, 41. Third large cylinder, 42. Third small cylinder.

[0030] 51. First flange; 52. Second flange; 53. Third flange; 54. Fourth flange. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown.

[0033] This utility model relates to a multi-stage mixing device for diaphragm wall construction, comprising multiple mixing power heads 2, which are fixed to a fixed cylinder for connection with a piling machine. Each mixing power head 2 includes a support housing 21 connected to the fixed cylinder, on which a hydraulic motor 22 is mounted. The bottom end of the output shaft 221 of the hydraulic motor 22 has a small-diameter active bevel gear 23, and a large-diameter passive bevel gear 24 meshing with the small-diameter active bevel gear 23 is coaxially fixed to a rotating shaft 212. Both ends of the rotating shaft 212 are rotatably fitted within the support housing 21, and both ends of the rotating shaft 212 are coaxially fixed to two symmetrically arranged cutterheads 25. Each cutterhead 25 has multiple mixing blades on its outer circumference.

[0034] The hydraulic pipe of the hydraulic motor 22 can be connected to the hydraulic source through the outside of the fixed cylinder, but preferably the hydraulic pipe of the hydraulic motor 22 is connected to the hydraulic source through the inside of the fixed cylinder.

[0035] See Figure 1 and Figure 2 This utility model discloses a first specific embodiment of a multi-stage mixing device for diaphragm wall construction, wherein the plurality of mixing power heads 2 comprises four. The fixed cylinder, such as the first fixed cylinder 1, includes a vertical first large cylinder 11, a fan-shaped first transition cylinder 13, and four first small cylinders 12. The top end of the fan-shaped first transition cylinder 13 is fixed to the bottom end of the first large cylinder 11, and the bottom end of the fan-shaped first transition cylinder 13 is fixed to the top end of the four first small cylinders 12, with the four first small cylinders forming an angle with each other, such as a 20°-30° angle. The fixing can be integrally formed or welded. The bottom end of each first small cylinder 12 is fixed to the top end of the support shell 21 of each mixing power head 2 via a pair of first flanges 51 and a plurality of bolts and nuts.

[0036] See Figure 3 and Figure 4This invention relates to a second specific embodiment of a multi-stage mixing device for diaphragm wall construction, wherein the plurality of mixing power heads 2 comprises four. The fixed cylinder, such as the second fixed cylinder 3, includes a vertical second large cylinder 31, a horizontal rectangular second transition cylinder 33, and four first small cylinders 32. The top of the horizontal rectangular second transition cylinder 33 is fixed to the bottom of the second large cylinder 31 at its midpoint, and the bottom of the horizontal rectangular second transition cylinder 33 is fixed to the top of the four second small cylinders 32. The four second small cylinders 32 are parallel to each other. The fixing can be integrally formed or welded. The bottom of each second small cylinder 32 is fixed to the top of the support shell 21 of each mixing power head 2 via a pair of third flanges 53 and multiple bolts and nuts.

[0037] See Figure 5 and Figure 6 This utility model discloses a third specific embodiment of a multi-stage mixing device for diaphragm wall construction, wherein the plurality of mixing power heads 2 are actually two. The fixed cylinder, such as the third fixed cylinder 4, includes a vertical third large cylinder 41 and two third small cylinders 42 whose lower ends form an angle of 20°-40° with each other. The top ends of both third small cylinders 42 are fixed to the bottom end of the third large cylinder 41. This fixing can be integrally formed or welded. The bottom end of each third small cylinder 42 is fixed to the top end of the support shell 21 of each mixing power head 2 via a pair of fourth flanges 54 and multiple bolts and nuts.

[0038] By adopting the above angles, the connection structure between the two adjacent stirring heads becomes more compact and the structure becomes simpler, while ensuring good mechanical properties of the stirring.

[0039] The thickness bisectors of the multiple stirring heads 2 can lie on the same straight line. Among the multiple stirring heads 2, the rotation directions of each pair of cutter discs 25 of two adjacent stirring heads 2 are opposite. For example, in two adjacent stirring heads 2, the rotation direction of one pair of cutter discs 25 of one stirring head 2 is opposite to that of another pair of cutter discs 25 of the other stirring head 2. For example, if one pair of cutter discs 25 rotates clockwise, the other pair of cutter discs 25 rotates counterclockwise.

[0040] Coaxial fixing is also called coaxial fixation. It is not difficult to understand that the number of multiple stirring heads 2 mentioned above is generally even in practical applications, such as four or two stirring heads 2.

[0041] See Figure 7 and Figure 8 .

[0042] Each support housing 21 can be two symmetrically arranged halves, and the two halves of the support housing 211 are fixed to each other by a pair of second flanges 52 and a plurality of bolts and nuts.

[0043] A circular bushing fixing body 26 is fitted inside the central hole of each half-support housing 211. Inside the bushing fixing body 26 is a bushing 27 that allows one end of the rotating shaft 212 to rotate. The circular bushing fixing body 26 is fixed to the half-support housing 211 by multiple first screws. The outer end of the bushing 27 has a bushing clamping ring 28, which is fixed to the outer end of the bushing fixing body 26 by multiple second screws.

[0044] Each cutter head 25 has a regular hexagonal protrusion 2511 fixed to the inner side of its end plate 251. Each end of the rotating shaft 212 has a regular hexagonal groove 2121 that fits the regular hexagonal protrusion 2511. The bottom wall of the regular hexagonal groove 2121 has a threaded blind hole 2121 coaxial with the large-diameter driven bevel gear 24. At the center of each cutter head 25 (251) and the center of the regular hexagonal protrusion 2511, there is a screw through hole 25111 coaxial with the threaded blind hole 2121. A third screw secures the cutter head 25 to the rotating shaft 212. The screw through hole 25111 can be a threaded hole or a smooth hole. The regular hexagonal protrusion 2511 is also called a regular hexagonal pillar.

[0045] It is easy to understand that the large cylinders, such as the first large cylinder 11, the second large cylinder 31, and the third large cylinder 41, as well as the small cylinders, such as the first small cylinder 12, the second small cylinder 32, and the third small cylinder 42, can all be rectangular cylinders. The fixed cylinder can be called an arm or a fixed frame. Of course, the fixed cylinders mentioned here include the first fixed cylinder 1, the second fixed cylinder 3, and the third fixed cylinder 4.

[0046] Each end of the rotating shaft 212 has a first rolling bearing 291 between it and the supporting housing 21. Similarly, each of the two halves of the supporting housing 211 may have a first rolling bearing 291 between it and the other half. Specifically, the outer ring of one first rolling bearing 291 is interference-fitted with an inner hole in one half of the supporting housing 211, and the inner ring of this first rolling bearing 291 is interference-fitted with one end of the shaft 212. The outer ring of the other first rolling bearing 291 is interference-fitted with another inner hole in the other half of the supporting housing 211, and the inner ring of this rolling bearing 291 is interference-fitted with the other end of the rotating shaft 212. A second rolling bearing 292 may be present between the output shaft 221 and the supporting housing 21. The inner ring of the second rolling bearing 292 may be interference-fitted with the output shaft 221, and the outer ring of the second rolling bearing 292 may be pressed against the wall of the hole formed when the two halves of the supporting housing 211 are closed.

[0047] The multiple stirring heads 2 have identical structures. The shape and number of stirring blades on each pair of cutter discs 23 in the multiple stirring heads 2 are identical. Each cutter disc 25 includes multiple fixed stirring blades 210, which are all located on the outer edge of the cutter disc 25 and can be evenly arranged along the circumference. Each fixed stirring blade 210 can be triangular, wider near the cutter disc 25 and narrower away from the cutter disc 25, with the outer tip cut off to maintain a flat surface 2101. Of course, retaining the outer tip is also possible, such as with a rounded transition, but the strength is relatively lower and the wear resistance and service life are relatively shorter compared to a flat surface 2101 after the outer tip is cut off. Therefore, it is generally preferred to cut off the outer tip to maintain a flat surface 2101.

[0048] It is easy to understand that, in order to ensure that the gap between the two rows of fixed mixing blades 210 does not form a long strip-shaped protrusion during the construction of the diaphragm wall, each mixing power head 2 in the multi-round mixing device for diaphragm wall construction of this utility model may also include a swing mixing blade 211, such as two or more swing mixing blades 211 hinged to the inner end of the cutter disc 25. The shape of the swing mixing blade 211 may be the same as that of the fixed mixing blade 210. The hinge structure and working principle of the swing mixing blade 211 are existing technologies. For example, when the cutter disc 25 rotates to the vertical support of the support housing 21, it may be interfered with or blocked by the vertical support of the support housing 21. The vertical support of the support housing 21 has an avoidance structure, such as a groove (not shown in the figure). After the swing mixing blade 211 passes through the vertical support along the groove, the inward thrust of the soil and the weight of the swing mixing blade 211 itself cause it to continue to swing inward, thus mixing the cement soil between the two rows of fixed mixing blades 210 on the two cutter discs 25. Since the oscillating stirring blade 211 is existing technology and is not within the protection scope of this utility model, it will not be described in detail.

[0049] It is not difficult to understand that multi-wheel agitation is also called multi-wheel milling. In this application, "multi-wheel" can be understood as multiple agitation power heads 2; for example, two agitation power heads 2 can be called two-wheel agitation, and four power heads 2 can be called four-wheel agitation. The agitation power head 2 can also be called a milling power head. The agitation cutter can also be called a milling head or agitation gear. The bevel gear can be called a conical gear, also known as a bevel gear or conical gear. Its use in diaphragm wall construction is also referred to as its use in anti-seepage wall construction or in water-stop curtain construction.

[0050] Components, structures, or quantities not marked above are not shown in the drawings, and some components are not marked in the drawings. The drawings are for illustrative purposes only. In case of any discrepancies between the drawings and the text descriptions, or between the drawings themselves, the text descriptions shall prevail.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage mixing device for diaphragm wall construction, characterized in that: It includes multiple mixing power heads, which are fixed on a fixed cylinder for connection with a piling machine. Each mixing power head includes a support housing connected to the fixed cylinder, on which a hydraulic motor is mounted. The bottom end of the output shaft of the hydraulic motor has a small-diameter active bevel gear, and a large-diameter passive bevel gear meshing with the small-diameter active bevel gear is coaxially fixed to a rotating shaft. The two ends of the rotating shaft are rotatably fitted inside the support housing, and the two ends of the rotating shaft are coaxially fixed to two symmetrically arranged cutter discs. Each cutter disc has multiple mixing blades on its outer circumference.

2. The multi-stage mixing device for diaphragm wall construction according to claim 1, characterized in that: The plurality of stirring heads are four in number; the first fixed cylinder includes a vertical first large cylinder, a fan-shaped first transition cylinder and four first small cylinders, the top of the fan-shaped first transition cylinder is fixed to the bottom of the first large cylinder, the bottom of the fan-shaped first transition cylinder is fixed to the top of the four first small cylinders, and the four first small cylinders are at an angle to each other; the bottom of each first small cylinder is fixed to the top of the support shell of each stirring head by a pair of first flanges and a plurality of bolts and nuts.

3. The multi-stage mixing device for diaphragm wall construction according to claim 1, characterized in that: The plurality of stirring heads are four in number; the second fixed cylinder includes a vertical second large cylinder, a horizontal rectangular second transition cylinder, and four first small cylinders. The top of the horizontal rectangular second transition cylinder is fixed to the bottom of the second large cylinder in the middle of its length, and the bottom of the horizontal rectangular second transition cylinder is fixed to the top of the four second small cylinders. The four second small cylinders are parallel to each other; the bottom of each second small cylinder is fixed to the top of the support shell of each stirring head by a pair of third flanges and a plurality of bolts and nuts.

4. The multi-stage mixing device for diaphragm wall construction according to claim 1, characterized in that: The plurality of stirring heads are two; the third fixed cylinder includes a vertical third large cylinder and two third small cylinders whose lower ends are at an angle to each other. The top ends of the two third small cylinders are fixed to the bottom end of the third large cylinder. The bottom end of each third small cylinder is fixed to the top end of the support shell of each stirring head by a pair of fourth flanges and a plurality of bolts and nuts.

5. The multi-stage mixing device for diaphragm wall construction according to claim 1, characterized in that: The thickness bisectors of multiple stirring heads are on the same straight line; among the multiple stirring heads, the rotation directions of the pair of cutter discs of two adjacent stirring heads are opposite.

6. The multi-stage mixing device for diaphragm wall construction according to claim 1, characterized in that: Each support housing consists of two symmetrically arranged halves, which are fixed together by a pair of second flanges and multiple bolts and nuts.

7. The multi-stage mixing device for diaphragm wall construction according to claim 6, characterized in that: Each half of the support housing has a bushing fixing body fitted inside the central hole. Inside the bushing fixing body is a bushing that allows one end of the rotating shaft to rotate. The bushing fixing body is fixed to the half support housing by multiple first screws. There is a bushing clamping ring at the outer end of the bushing, which is fixed to the outer end of the bushing fixing body by multiple second screws.

8. The multi-stage mixing device for diaphragm wall construction according to claim 7, characterized in that: Each cutter head has a regular hexagonal protrusion fixed on the inner side of its end plate. Each end of the rotating shaft has a regular hexagonal groove that fits the regular hexagonal protrusion. The bottom wall of the regular hexagonal groove has a threaded blind hole that is coaxial with the large-diameter driven bevel gear. The center of the end plate of each cutter head and the center of the regular hexagonal protrusion have a screw through hole that is coaxial with the threaded blind hole. A third screw secures the cutter head to the rotating shaft.

9. The multi-stage mixing device for diaphragm wall construction according to claim 1, characterized in that: Each end of the rotating shaft has a rolling bearing between it and the supporting housing; the output shaft has a rolling bearing between it and the supporting housing.

10. The multi-stage mixing device for diaphragm wall construction according to claim 1, characterized in that: The multiple stirring heads have the same structure; the shape and number of stirring blades on each pair of blades in the multiple stirring heads are the same: the stirring blades on each blade include multiple fixed stirring blades, and the multiple fixed stirring blades are all set on the outer edge of the blade; each fixed stirring blade is triangular, with the part closer to the blade and the part farther away from the blade, and the outer tip is cut off to maintain a plane.

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