Automatic variable-speed stirring head for cement stirring pile construction

Abstract

The utility model discloses an automatic speed changing stirring head for cement stirring pile construction, and relates to the technical field of stirring pile construction. The discharging barrel is fixedly connected to the upper end of the rotating head, and a plurality of discharging openings are formed in the outer wall of the discharging barrel; the lower end of the feeding pipe is communicated with the discharge ports, so that cement is sprayed out through the discharge ports; and the upper connecting cylinders are vertically and sequentially connected, and the upper connecting cylinder at the bottommost end is fixedly connected to the upper end of the discharging cylinder. According to the utility model, the damaged upper connecting cylinder can be detached through the fixing assembly, and the upper stirring cutters on other upper connecting cylinders can still be used, so that the damaged upper stirring cutters can be conveniently replaced, and when the stirring head drills into a hard stratum, the torsion between the upper and lower adjacent upper connecting cylinders can be increased, and the stirring efficiency is improved. The torsion of the stirring head is detected through the pressure controller, and when the torsion exceeds a preset value, the rotating speed of the stirring head can be reduced, so that the stirring head is protected and prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of cement mixing pile construction technology, and in particular to an automatic speed-changing mixing head for cement mixing pile construction. Background Technology

[0002] Cement-soil mixing piles are a method for reinforcing saturated soft clay foundations. They use cement as a curing agent and, through specially designed mixing machinery, force the soft soil and curing agent to mix deep within the foundation. The series of physicochemical reactions between the curing agent and the soft soil cause the soft soil to harden into a high-quality foundation with integrity, water stability, and a certain strength.

[0003] Currently, due to the varying nature and strata of soft soil, which makes it highly unpredictable, the mixing blades on the mixing piles often encounter deep, hard geological layers during the construction of mixing piles. Continuing to drill can easily damage the mixing blades, resulting in reduced mixing efficiency and uneven mixing. Furthermore, damaged mixing blades are not easy to replace and require replacement of the entire mixing head, increasing costs. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a mixing head for cement mixing pile construction that facilitates blade replacement and automatically adjusts speed when encountering resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic speed-changing mixing head for cement mixing pile construction includes:

[0007] Rotate the head;

[0008] The discharge cylinder is fixedly connected to the upper end of the rotating head, and the outer wall of the discharge cylinder is provided with multiple discharge ports;

[0009] The lower end of the feeding pipe is connected to each discharge port so that cement can be sprayed out through each discharge port;

[0010] Multiple upper connecting cylinders are vertically connected in sequence, and the bottommost upper connecting cylinder is fixedly connected to the upper end of the discharge cylinder. Each upper connecting cylinder is fixedly connected to an upper stirring blade.

[0011] And a pressure controller, which is located between two adjacent upper connecting cylinders.

[0012] Furthermore, it also includes a fixing component for fixing the connection between each upper connecting cylinder. Each fixing component includes a positioning ring, multiple bolts and a fixing ring. The positioning ring is fixedly connected to the top of the upper connecting cylinder. The bolts are spaced apart on the positioning ring along the circumference. The fixing ring is provided with multiple fixing holes spaced apart along the circumference. Each bolt can be inserted into a fixing hole.

[0013] Furthermore, the upper surface of the positioning ring is higher than the upper surface of the upper connecting cylinder, so that the positioning ring of the upper connecting cylinder can be inserted into the bottom of the adjacent upper connecting cylinder above.

[0014] Furthermore, it also includes a lower connecting cylinder, which is fixedly connected between the discharge cylinder and the bottommost upper connecting cylinder. The lower connecting cylinder is provided with a lower stirring blade on its outside, and the length of the lower stirring blade is shorter than that of the upper stirring blade.

[0015] Furthermore, both the upper and lower stirring blades are inclined, and each of the upper and lower stirring blades has a blade on the lower side.

[0016] Furthermore, the discharge cylinder is conical, and each discharge port is spaced apart around the circumference of the discharge cylinder.

[0017] Furthermore, the lower end of the feeding pipe is provided with multiple connecting pipes, each of which is connected to a discharge port.

[0018] Furthermore, the rotating head is equipped with spiral blades on its exterior.

[0019] Furthermore, a mounting bracket is provided between two adjacent upper connecting cylinders, and a pressure controller is mounted on the mounting bracket. The pressure controller is used to detect the torque between the two adjacent upper connecting cylinders.

[0020] Furthermore, a reinforcing plate is provided between the positioning ring and the upper connecting cylinder, and a reinforcing plate is provided between the fixing ring and the upper connecting cylinder.

[0021] The beneficial effects of this utility model are as follows:

[0022] In this utility model, when the upper mixing blade on one of the upper connecting cylinders of the automatic speed-changing mixing head for cement mixing pile construction is damaged, it can be removed by fixing components, while the upper mixing blades on the other upper connecting cylinders can still be used, thus facilitating the replacement of the damaged upper mixing blades and reducing costs.

[0023] When two adjacent upper connecting cylinders are connected and fixed, since the upper surface of the positioning ring is higher than the upper surface of the upper connecting cylinder, the positioning ring of the upper connecting cylinder can be inserted into the bottom of the upper adjacent upper connecting cylinder, which facilitates the positioning and connection of the two adjacent upper connecting cylinders. At this time, each bolt is inserted into a fixing hole, and the two adjacent upper connecting cylinders can be connected and fixed by the bolts, making the connection and installation of the upper connecting cylinders simple.

[0024] When the stirring head penetrates into a hard layer, the bottom upper connecting cylinder will encounter resistance, and the torque between the two adjacent upper connecting cylinders will increase. The torque is detected by the pressure controller. When the torque exceeds the preset value, the speed of the stirring head can be reduced to protect the stirring head and prevent it from being damaged.

[0025] As the mixing head penetrates deeper, the lower mixing blade located on the lower connecting cylinder enters the ground first. Due to its shorter length, it is easier to enter, reducing the resistance encountered by the upper mixing blade when it enters the ground. The mixing head continues to penetrate deeper until the lower and upper connecting cylinders enter the soft soil layer. At this point, the upper and lower mixing blades rotate inside the soft soil layer with the mixing head. The blades on the upper and lower mixing blades can crush the soft soil, making it easier to mix with cement and improving the mixing effect of the mixing head. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of an automatic speed-changing mixing head for cement mixing pile construction proposed in this utility model.

[0027] Figure 2 This is a cross-sectional structural diagram of an automatic speed-changing mixing head for cement mixing pile construction proposed in this utility model.

[0028] Figure 3 This is a cross-sectional view of the structure of an automatic speed-changing mixing head for cement mixing pile construction after the separation of two adjacent upper connecting cylinders, as proposed in this utility model.

[0029] In the diagram: 1 Rotating head, 101 Spiral blade, 2 Discharge cylinder, 201 Discharge port, 3 Lower connecting cylinder, 301 Lower stirring blade, 4 Upper connecting cylinder, 401 Upper stirring blade, 5 Feeding pipe, 501 Connecting pipe, 6 Fixing component, 601 Positioning ring, 602 Bolt, 603 Fixing ring, 7 Blade. Detailed Implementation

[0030] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0031] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0032] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0033] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0034] Example 1

[0035] Reference Figure 1-3 An automatic speed-changing mixing head for cement mixing pile construction is used in cement mixing pile construction. In order to reduce the rotation speed when the mixing head drills into hard strata to avoid damage to the mixing head, and at the same time to facilitate the disassembly and replacement of damaged mixing blades.

[0036] The automatic speed-changing mixing head for cement mixing pile construction includes a rotating head 1, a discharge cylinder 2, a feeding pipe 5, multiple upper connecting cylinders 4, and a pressure controller.

[0037] The bottom of the rotating head 1 is shaped like a conical drill bit, and the rotating head 1 is equipped with a spiral blade 101. When the rotating head 1 rotates, it is convenient for the device to enter the ground. The discharge cylinder 2 is fixedly connected to the upper end of the rotating head 1. The discharge cylinder 2 is conical, and the conical discharge cylinder 2 is convenient to enter the soft soil with the rotating head 1. Multiple discharge ports 201 are arranged circumferentially on the outer wall of the discharge cylinder 2. Multiple connecting pipes 501 are provided at the lower end of the feeding pipe 5. Each connecting pipe 501 is connected to a discharge port 201. After the rotating head 1 enters the ground, cement can be sprayed out through each discharge port 201, thereby injecting cement into the soft soil.

[0038] Each upper connecting cylinder 4 is vertically connected in sequence by a fixing component 6. Each upper connecting cylinder 4 is externally fixed with an upper stirring blade 401. The upper connecting cylinders 4 can be disassembled and connected by the fixing component 6. When the upper stirring blade 401 on one upper connecting cylinder 4 is damaged, it can be removed by the fixing component 6, while the upper stirring blades 401 on the other upper connecting cylinders 4 can still be used, which facilitates the replacement of the damaged upper stirring blade 401 and reduces costs.

[0039] Each fixing component 6 includes a positioning ring 601, multiple bolts 602, and a fixing ring 603. The positioning ring 601 is fixedly connected to the top of the upper connecting cylinder 4. The bolts 602 are spaced apart on the positioning ring 601 along the circumference. The fixing ring 603 is provided with multiple fixing holes spaced apart along the circumference. When two adjacent upper connecting cylinders 4 are connected and fixed, since the upper surface of the positioning ring 601 is higher than the upper surface of the upper connecting cylinder 4, the positioning ring 601 of the upper connecting cylinder 4 can be inserted into the bottom of the upper adjacent upper connecting cylinder 4, thereby facilitating the positioning and connection of two adjacent upper connecting cylinders 4. At this time, each bolt 602 is inserted into a fixing hole, and the two adjacent upper connecting cylinders 4 can be connected and fixed by the bolts 602.

[0040] To improve the mixing effect of the mixing head, the automatic speed-changing mixing head for cement mixing pile construction also includes a lower connecting cylinder 3. The lower connecting cylinder 3 is fixedly connected between the discharge cylinder 2 and the bottom upper connecting cylinder 4. The lower connecting cylinder 3 is equipped with a lower mixing blade 301 on its outside. The bottom upper connecting cylinder 4 can also be fixedly connected to the upper end of the lower connecting cylinder 3 by a fixing component 6. Both the upper mixing blade 401 and the lower mixing blade 301 are inclined. The length of the lower mixing blade 301 is shorter than that of the upper mixing blade 401. The lower mixing blade 301, located at the bottom, is shorter, which makes it easier to enter the ground first and reduces the resistance encountered by the upper mixing blade 401 when entering the ground. Furthermore, the lower side of both the upper mixing blade 401 and the lower mixing blade 301 is equipped with a blade 7. The blade 7 can crush the soft soil, making it easier to mix with cement and further improving the mixing effect of the mixing head.

[0041] A mounting bracket is provided between two adjacent upper connecting cylinders 4, and a pressure controller is installed on the mounting bracket. The pressure controller is used to detect the torque between the two adjacent upper connecting cylinders 4. When the bottom upper connecting cylinder 4 drills into a hard layer and encounters resistance, the torque between the two adjacent upper connecting cylinders 4 will increase. The pressure controller detects the torque. When the torque exceeds a preset value, the rotation speed of the stirring head can be reduced to protect the stirring head and prevent it from being damaged. The pressure controller is existing technology, and its installation method and working principle will not be described in detail. In this embodiment, a torque sensor can also be used to detect the torque between the two adjacent upper connecting cylinders 4, which will not be described in detail here.

[0042] Example 2

[0043] An automatic speed-changing mixing head for cement mixing pile construction is provided. To improve performance, the automatic speed-changing mixing head for cement mixing pile construction also includes a reinforcing plate. A reinforcing plate is provided between the positioning ring 601 and the upper connecting cylinder 4, and a reinforcing plate is provided between the fixing ring 603 and the upper connecting cylinder 4. The reinforcing plate can improve the stability of the connection between the positioning ring 601 and the fixing ring 603 and the upper connecting cylinder 4, and extend the service life of the device.

[0044] The working principle of the automatic speed-changing mixing head for cement mixing pile construction is as follows: When in use, the mixing head is installed on the construction machinery, and the machinery moves and rotates the mixing head to allow it to enter the soft head layer.

[0045] When the mixing head enters the soft soil layer, the spiral blade 101 on the outside of the rotating head 1 is rotated to facilitate the mixing head entering the ground. The conical discharge cylinder 2 is convenient to enter the soft soil with the rotating head 1. At this time, the feeding pipe 5 connected to the external cement pump truck inputs cement into the interior of the mixing head 1. After the cement passes through each connecting pipe 501, it is sprayed out in all directions through each discharge port 201 on the discharge cylinder 2, thereby injecting the cement into the soft soil.

[0046] As the mixing head continues to penetrate deeper, the lower mixing blade 301 located on the lower connecting cylinder 3 enters the ground first. Due to its smaller length, it is easier to enter, reducing the resistance encountered by the upper mixing blade 401 when it enters the ground. The mixing head continues to penetrate deeper until the lower connecting cylinder 3 and the upper connecting cylinder 4 enter the soft soil layer. At this time, the upper mixing blade 401 and the lower mixing blade 301 rotate inside the soft soil layer with the mixing head. The blades 7 on the upper mixing blade 401 and the lower mixing blade 301 can crush the soft soil, making it easier to mix with cement and improving the mixing effect of the mixing head.

[0047] When the stirring head penetrates into a hard layer, the bottom upper connecting cylinder 4 will encounter resistance, and the torque between the two adjacent upper connecting cylinders 4 will increase. The torque is detected by the pressure controller. When the torque exceeds the preset value, the speed of the stirring head can be reduced to protect the stirring head and prevent it from being damaged.

[0048] When one of the upper stirring blades 401 on the upper connecting cylinder 4 is damaged, it can be removed by fixing component 6, while the upper stirring blades 401 on the other upper connecting cylinders 4 can still be used, which makes it convenient to replace the damaged upper stirring blade 401 and reduces costs. The two adjacent upper connecting cylinders 4 can be separated by unscrewing the nut on the bolt 602.

[0049] When two adjacent upper connecting cylinders 4 are connected and fixed, since the upper surface of the positioning ring 601 is higher than the upper surface of the upper connecting cylinder 4, the positioning ring 601 of the upper connecting cylinder 4 can be inserted into the bottom of the upper adjacent upper connecting cylinder 4, which facilitates the positioning and connection of the two adjacent upper connecting cylinders 4. At this time, each bolt 602 is inserted into a fixing hole, and the two adjacent upper connecting cylinders 4 can be connected and fixed by the bolt 602.

[0050] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic speed-changing mixing head for cement mixing pile construction, characterized in that, include: Rotate head (1); The discharge cylinder (2) is fixedly connected to the upper end of the rotating head (1), and the outer wall of the discharge cylinder (2) is provided with multiple discharge ports (201); The feeding pipe (5) is connected at its lower end to each of the discharge ports (201) so that cement is sprayed out through each discharge port (201); Multiple upper connecting cylinders (4) are vertically connected in sequence, and the bottommost upper connecting cylinder (4) is fixedly connected to the upper end of the discharge cylinder (2). An upper stirring blade (401) is fixedly connected to the outside of each upper connecting cylinder (4). And a pressure controller, which is located between two adjacent upper connecting cylinders (4).

2. The automatic speed-changing mixing head for cement mixing pile construction according to claim 1, characterized in that: It also includes a fixing component (6), which is used for fixing the connection between each of the upper connecting cylinders (4). Each fixing component (6) includes a positioning ring (601), a plurality of bolts (602) and a fixing ring (603). The positioning ring (601) is fixedly connected to the top end of the upper connecting cylinder (4). The bolts (602) are circumferentially spaced on the positioning ring (601). The fixing ring (603) is circumferentially spaced with a plurality of fixing holes. Each bolt (602) can be inserted into one of the fixing holes.

3. The automatic speed-changing mixing head for cement mixing pile construction according to claim 2, characterized in that: The upper surface of the positioning ring (601) is higher than the upper surface of the upper connecting cylinder (4) so ​​that the positioning ring (601) of the upper connecting cylinder (4) can be inserted into the bottom of the adjacent upper connecting cylinder (4) above.

4. The automatic speed-changing mixing head for cement mixing pile construction according to claim 1, characterized in that: It also includes a lower connecting cylinder (3), which is fixedly connected between the discharge cylinder (2) and the bottommost upper connecting cylinder (4). The lower connecting cylinder (3) is provided with a lower stirring blade (301) on its outside, and the length of the lower stirring blade (301) is less than that of the upper stirring blade (401).

5. The automatic speed-changing mixing head for cement mixing pile construction according to claim 4, characterized in that: Both the upper stirring blade (401) and the lower stirring blade (301) are inclined, and both the upper stirring blade (401) and the lower stirring blade (301) are provided with blades (7) on the lower side.

6. The automatic speed-changing mixing head for cement mixing pile construction according to claim 1, characterized in that: The discharge cylinder (2) is conical, and each discharge port (201) is arranged circumferentially around the discharge cylinder (2).

7. The automatic speed-changing mixing head for cement mixing pile construction according to claim 6, characterized in that: The lower end of the feeding pipe (5) is provided with a plurality of connecting pipes (501), and each of the connecting pipes (501) is connected to a discharge port (201).

8. The automatic speed-changing mixing head for cement mixing pile construction according to claim 1, characterized in that: The rotating head (1) is provided with a spiral blade (101) on its outside.

9. The automatic speed-changing mixing head for cement mixing pile construction according to claim 1, characterized in that: A mounting bracket is provided between two adjacent upper connecting cylinders (4), and the pressure controller is mounted on the mounting bracket. The pressure controller is used to detect the torque between the two adjacent upper connecting cylinders (4).

10. An automatic speed-changing mixing head for cement mixing pile construction according to claim 2, characterized in that: A reinforcing plate is provided between the positioning ring (601) and the upper connecting cylinder (4), and a reinforcing plate is provided between the fixing ring (603) and the upper connecting cylinder (4).

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