A cold region cement mixing pile temperature control mixing head assembly

Abstract

The utility model discloses a cold region cement mixing pile temperature control stirring head subassembly, including the stirring rod, the inside of stirring rod is equipped with the baffle, and the baffle bottom end is connected with the stirring rod, and the inside of baffle is equipped with the heating chamber, and the outside of baffle is equipped with the discharge chamber, and the outside of stirring rod is connected with the stirring vane, and the number of stirring vane is three groups, and the inside of the most bottom stirring vane is equipped with the delivery channel, and the delivery channel is linked together with the discharge chamber, the utility model discloses through the even heating of heat conduction oil in the heat chamber cooperation heating rod, make the slurry in the discharge chamber keep suitable temperature, effectively prevent the slurry condensation, the caking etc. problem, ensure that it still has good fluidity and pumpability under low temperature environment, and through setting temperature sensor and PLC controller electric connection, can real -time monitoring heating chamber temperature, and according to feedback data automatic regulation heating rod power, realize closed -loop control, ensure the temperature constant in whole stirring process.

Description

Technical Field

[0001] This utility model relates to the field of cement mixing pile mixing technology, and more specifically, to a temperature-controlled mixing head assembly for cement mixing piles in cold regions. Background Technology

[0002] In soft soil foundation reinforcement, foundation pit support and seepage prevention projects, cement mixing piles are a common foundation treatment method. Due to their advantages such as simple construction, low cost, environmental protection and energy saving, they are widely used in various civil engineering projects.

[0003] However, in cold regions (such as high-latitude or high-altitude areas), the low temperature environment severely affects the hydration reaction and fluidity of the cement grout, thus impacting the quality of the pile and the durability of the project. Under low-temperature conditions, the hydration reaction rate of the cement grout decreases, leading to prolonged setting time and even the possibility of localized freezing. This not only affects the fluidity of the cement grout but also results in uneven mixing, preventing the cement grout from fully mixing with the soil, ultimately affecting the strength and uniformity of the pile.

[0004] Currently, conventional cement mixing pile construction equipment mostly uses ordinary mixing head structures, which lack internal heating devices and rely solely on the temperature of the external environment or the slurry itself for mixing. This traditional mixing head structure has significant shortcomings under low-temperature conditions. Due to the lack of effective heating measures, the cement slurry is prone to problems such as decreased fluidity, prolonged setting time, and even localized freezing during the mixing process. These problems lead to uneven mixing, low pile strength, and poor pile uniformity, seriously affecting the construction quality and engineering durability of cement mixing piles.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In response to the problems in related technologies, this utility model proposes a temperature-controlled mixing head assembly for cement mixing piles in cold regions, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows:

[0008] A temperature-controlled mixing head assembly for cement mixing piles in cold regions includes a mixing rod, a partition inside the mixing rod, the bottom end of the partition being connected to the mixing rod, a heating chamber inside the partition, a discharge chamber outside the partition, mixing blades connected to the outside of the mixing rod, and three sets of mixing blades, with a conveying channel inside the lowest mixing blade, the conveying channel being connected to the discharge chamber.

[0009] Furthermore, in order to heat the cement slurry inside the discharge chamber, the heating chamber is equipped with heat-conducting oil, a mounting plate is installed at the top of the heating chamber, a heating rod is connected below the mounting plate, and a temperature sensor is connected to the inner wall of the partition.

[0010] Furthermore, in order to fix the mounting plate, the mounting plate is connected to the partition plate by the first bolt, and the mounting plate is provided with wire through holes.

[0011] Furthermore, the temperature sensor is electrically connected to the PLC controller, the PLC controller is connected to the heating rod, and the PLC controller is located on the outside of the stirring rod.

[0012] Furthermore, the bottom end of the stirring blade is connected with reinforcing teeth.

[0013] Furthermore, a sealing cap is threadedly connected below the partition, and a fixing plate is provided at the bottom of the stirring rod, with a drill bit connected below the fixing plate.

[0014] Furthermore, an installation ring is connected to the outside of the stirring rod, and a second bolt is provided inside the fixing plate and the installation ring.

[0015] Furthermore, one end of the second bolt passes through the fixing plate and the mounting ring and is connected to the nut.

[0016] The beneficial effects of this utility model are as follows:

[0017] The heat-conducting oil in the heating chamber, in conjunction with the heating rods, provides uniform heating, maintaining a suitable temperature for the slurry in the discharge chamber. This effectively prevents problems such as slurry condensation and clumping, ensuring good fluidity and pumpability even at low temperatures. Furthermore, by installing a temperature sensor electrically connected to a PLC controller, the temperature inside the heating chamber can be monitored in real time, and the power of the heating rods can be automatically adjusted based on the feedback data to achieve closed-loop control. This ensures a constant temperature throughout the mixing process, preventing temperature fluctuations from affecting the cement hydration reaction and the quality of pile formation.

[0018] (2) By setting an installation plate on the top of the heating chamber and fixing it to the partition with the first bolt, it is convenient to disassemble and replace the heating rod or repair the temperature sensor; the design of the wire hole also facilitates the laying of electrical lines, and by setting a sealing cover, it is convenient to discharge the heat transfer oil in the heating chamber. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of a temperature-controlled mixing head assembly for cement mixing piles in cold regions, according to an embodiment of the present utility model.

[0021] Figure 2 This is a structural diagram of the mixing rod of a temperature-controlled mixing head assembly for cement mixing piles in cold regions, according to an embodiment of this utility model.

[0022] Figure 3 This is a structural diagram of the mixing rod of a temperature-controlled mixing head assembly for cement mixing piles in cold regions, according to an embodiment of the present utility model.

[0023] Figure 4 This is a top view of the mixing rod of a temperature-controlled mixing head assembly for cement mixing piles in cold regions, according to an embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Stirring rod; 2. Baffle plate; 3. Heating chamber; 4. Discharge chamber; 5. Stirring blade; 6. Conveying channel; 7. Mounting plate; 8. Heating rod; 9. Temperature sensor; 10. First bolt; 11. Wiring hole; 12. PLC control unit; 13. Reinforcing tooth; 14. Sealing cover; 15. Fixing plate; 16. Drill bit; 17. Mounting ring; 18. Second bolt; 19. Nut. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] According to an embodiment of the present invention, a temperature-controlled mixing head assembly for cement mixing piles in cold regions is provided.

[0028] Example 1

[0029] like Figures 1-4As shown, the temperature-controlled mixing head assembly for cement mixing piles in cold regions according to an embodiment of this utility model includes a mixing rod 1, which serves as the main support structure of the entire mixing head assembly, bearing all other components and responsible for transmitting rotational power to the mixing blades 5. A partition 2 is provided inside the mixing rod 1, dividing the interior of the mixing rod 1 into two independent spaces: a heating chamber 3 and a discharge chamber 4. This ensures that the heating medium does not directly contact the cement slurry, but effectively transfers heat. The bottom end of the partition 2 is connected to the mixing rod 1, and the heating chamber 3 inside the partition 2 contains heat transfer oil or other heating media. Heat is provided through a heating rod 8, indirectly heating the cement slurry in the discharge chamber 4. The discharge chamber 4 is located outside the partition 2, used to contain and transport the preheated cement slurry. The mixing blades 5 at the lowest end have a conveying channel 6 that communicates with the discharge chamber 4, facilitating smooth discharge of the slurry. The mixing blades 5 are connected to the outside of the mixing rod 1, and their main function is to break up the soil and fully mix it with the cement slurry, enhancing the mixing effect. There are three sets of stirring blades 5. The bottommost stirring blade 5 has a conveying channel 6 inside, which is connected to the discharge chamber 4. The conveying channel 6 serves as the outlet for the slurry from the discharge chamber 4 to the outside, ensuring that the slurry can be discharged smoothly. The top of the heating chamber 3 is equipped with a mounting plate 7 for fixing the heating rod 8. The heating rod 8 is connected below the mounting plate 7 to provide heat, heating the heat transfer oil or other media, thereby indirectly heating the cement slurry in the discharge chamber 4. A temperature sensor 9 is connected to the inner wall of the partition 2 to monitor the temperature change in the heating chamber 3 in real time and feed it back to the PLC controller 12 to adjust the working state of the heating rod 8. The mounting plate 7 is connected to the partition 2 by the first bolt 10. The mounting plate 7 has a wire hole 11. The temperature sensor 9 is electrically connected to the PLC controller 12, and the PLC controller 12 is connected to the heating rod 8. In order to accommodate the rotational movement of the stirring rod 1 during operation, the joint between the temperature sensor 9 and the heating rod 8 and the PLC controller 12 adopts a special rotary connection design (such as a slip ring or rotary joint). This design allows the signal lines to maintain a continuous electrical connection during the rotation of the stirring rod 1, avoiding problems such as wire tangling or disconnection caused by mechanical movement, thus ensuring the stability and reliability of data transmission. The PLC controller 12 is located on the outside of the stirring rod 1, and a connection plate is provided on the outside of the PLC controller 12. The connection plate has connection holes to facilitate the installation of the PLC controller 12 according to construction requirements.

[0030] like Figures 1-4As shown, the bottom end of the mixing blade 5 is connected to a reinforcing tooth 13, which increases the friction and cutting force when the mixing blade 5 contacts the soil. A sealing cap 14 is threadedly connected below the partition 2. The sealing cap 14 seals the space below the partition 2, preventing external impurities from entering the heating chamber 3, and also facilitates maintenance and cleaning of the internal components. A fixing plate 15 is provided at the bottom of the mixing rod 1. A drill bit 16 is connected below the fixing plate 15 to penetrate the soil layer, providing a channel for subsequent cement slurry injection and mixing. A mounting ring 17 is connected to the outside of the mixing rod 1. A second bolt 18 is provided inside the fixing plate 15 and the mounting ring 17. One end of the second bolt 18 passes through the fixing plate 15 and the mounting ring 17 and is connected to a nut 19 to securely fix the drill bit 16 to the mixing rod 1, ensuring the stability of the entire device during rotation and pressure application.

[0031] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0032] In summary, with the help of the above-mentioned technical solution of this utility model, in actual use, the heating rod 8 is started to heat the heat transfer oil in the heating chamber 3. The temperature sensor 9 monitors the temperature change in the heating chamber 3 in real time and feeds the data back to the PLC controller 12. The PLC controller 12 automatically adjusts the power output of the heating rod 8 according to the set target temperature to maintain a constant heating temperature, thereby indirectly heating the cement slurry in the discharge chamber 4. The drill bit 16 first rotates and applies downward pressure to penetrate the soil layer, providing a channel for subsequent cement slurry injection and mixing. During the operation of the mixing rod 1, the mixing rod 1 can drive the mixing blade 5 to start rotating, and the cement slurry is discharged into the discharge chamber 4 through the mud discharge pipe. The mixing blade 5 at the lowest end is provided with a conveying channel 6, which is connected to the discharge chamber 4 to ensure that the preheated cement slurry can be smoothly discharged and evenly distributed in the borehole. When it is necessary to replace the heat transfer oil inside the heating chamber 3, the fixing plate 15 can be removed by first disassembling the second bolt 18 and nut 19. After the fixing plate 15 is removed, the sealing cover 14 can be unscrewed to facilitate the drainage of the heat transfer oil. The design of the fixing plate 15 not only facilitates the replacement of the drill bit 16, but also protects the sealing cover 14 to prevent dust from adhering to the sealing cover 14 during the operation of the drill bit 16.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature-controlled mixing head assembly for cement mixing piles in cold regions, characterized in that, It includes a stirring rod (1), a partition (2) is provided inside the stirring rod (1), the bottom end of the partition (2) is connected to the stirring rod (1), a heating chamber (3) is provided inside the partition (2), a discharge chamber (4) is provided outside the partition (2), stirring blades (5) are connected to the outside of the stirring rod (1), the number of stirring blades (5) is three sets, and the bottom stirring blade (5) is provided with a conveying channel (6), which is connected to the discharge chamber (4).

2. The temperature-controlled mixing head assembly for cement mixing piles in cold regions according to claim 1, characterized in that, The heating chamber (3) is filled with heat-conducting oil, and the top of the heating chamber (3) is provided with an installation plate (7). A heating rod (8) is connected below the installation plate (7), and a temperature sensor (9) is connected to the inner wall of the partition (2).

3. The temperature-controlled mixing head assembly for cement mixing piles in cold regions according to claim 2, characterized in that, The mounting plate (7) is connected to the partition plate (2) by the first bolt (10), and the mounting plate (7) is provided with a wire hole (11).

4. The temperature-controlled mixing head assembly for cement mixing piles in cold regions according to claim 3, characterized in that, The temperature sensor (9) is electrically connected to the PLC controller (12), the PLC controller (12) is connected to the heating rod (8), and the PLC controller (12) is located on the outside of the stirring rod (1).

5. The temperature-controlled mixing head assembly for cement mixing piles in cold regions according to claim 1, characterized in that, The bottom end of the stirring blade (5) is connected to a reinforcing tooth (13).

6. The temperature-controlled mixing head assembly for cement mixing piles in cold regions according to claim 1, characterized in that, A sealing cap (14) is threadedly connected below the partition (2), and a fixing plate (15) is provided at the bottom of the stirring rod (1). A drill bit (16) is connected below the fixing plate (15).

7. The temperature-controlled mixing head assembly for cement mixing piles in cold regions according to claim 1, characterized in that, The stirring rod (1) is connected to an installation ring (17) on the outside, and a second bolt (18) is provided inside the fixing plate (15) and the installation ring (17).

8. The temperature-controlled mixing head assembly for cement mixing piles in cold regions according to claim 7, characterized in that, One end of the second bolt (18) passes through the fixing plate (15) and the mounting ring (17) and is connected to the nut (19).

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