A freezing-proof grouting guide pipe for a vibratory cement-soil mixing head

Abstract

The utility model discloses a vibration type cement soil mixing head anti -freezing grouting guide pipe belongs to grouting guide pipe technical field, including, including the insertion pipe, its characterized in that: the insertion pipe inner chamber bottom wall is fixed with telescopic link, and the telescopic link telescopic end is fixed with the injection pipe of insertion pipe sliding connection, and the lower portion of injection pipe outer ring is equipped with a plurality of injection holes, and the injection pipe extends to the inner chamber of insertion pipe and covers injection hole with the help of insertion pipe cover, and the injection pipe is installed with heating anti -freezing subassembly, and the insertion pipe outer wall is installed with the vibration subassembly for letting injection pipe vibrate. The utility model discloses effectively prevent grouting hole blockage, improve construction reliability, and have the initiative heating anti -freezing function.

Description

Technical Field

[0001] This utility model relates to the field of grouting conduit technology, and in particular to a vibrating cement-soil mixing head antifreeze grouting conduit. Background Technology

[0002] Cement-soil mixing is a commonly used foundation treatment and reinforcement technology in geotechnical engineering. Its basic principle is to use deep mixing machinery to forcibly mix cement slurry with soft soil layers in situ to form cement-soil piles with certain strength, stability and water tightness, thereby improving the bearing capacity of the foundation, reducing settlement and improving the engineering properties of the soil.

[0003] In traditional grouting processes, grouting pipes are typically fixed structures. During the process of lowering the grouting pipe to a predetermined depth, the grouting holes at its ends are directly exposed to the external environment. When traversing different soil layers, impurities such as mud, sand, gravel, and debris can easily squeeze into and clog the grouting holes. Once clogged, it not only affects the normal ejection of grout, leading to uneven grouting or failure, but also makes cleaning extremely difficult, seriously affecting construction efficiency and project quality. Furthermore, in cold regions or during winter construction, when the ambient temperature is below freezing, the cement grout, due to its small pipe diameter and reduced flow rate, is prone to freezing near the grouting holes when delivered to the end of the grouting pipe, forming ice blockages. This not only interrupts the grouting operation but also damages the equipment, making winter construction a significant challenge. Utility Model Content

[0004] The purpose of this invention is to effectively prevent grouting hole blockage, improve construction reliability, and provide active heating and antifreeze functions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a vibrating cement-soil mixing head antifreeze grouting conduit, comprising an insertion tube, characterized in that: a telescopic rod is fixed to the bottom wall of the inner cavity of the insertion tube, an injection tube is fixed to the telescopic end of the telescopic rod and slidably connected to the insertion tube, a plurality of injection holes are provided below the outer ring of the injection tube, the injection tube extends into the inner cavity of the insertion tube and covers the injection holes with the help of the insertion tube, a heating and antifreeze component is installed on the injection tube, and a vibration component for vibrating the injection tube is installed on the outer wall of the insertion tube.

[0006] As a further description of the above technical solution: the top of the injection pipe is connected to a grouting pump via a delivery pipe, the grouting pump is connected to a grout storage tank via a suction pipe, and a stirrer is provided on the top of the grout storage tank.

[0007] As a further description of the above technical solution: a rectangular slurry outlet hole is provided on the upper part of the outer wall of the insertion tube, and the bottom of the insertion tube is conical.

[0008] As a further description of the above technical solution: the inner wall of the insertion tube is provided with at least two guide strips, and the outer wall of the injection tube is provided with at least two guide grooves that cooperate with the guide strips.

[0009] As a further description of the above technical solution: the bottom of the injection tube is provided with an upwardly recessed cylindrical groove, the telescopic rod extends upward into the cylindrical groove, and the telescopic end of the telescopic rod is fixedly connected to the inner wall of the cylindrical groove.

[0010] As a further description of the above technical solution: the heating and antifreeze assembly includes several heat-conducting mounting seats fixed to the inner wall of the cylindrical groove, and each heat-conducting mounting seat is equipped with an electric heating tube.

[0011] As a further description of the above technical solution: the vibration assembly includes a vibration motor fixed on the insertion tube, the vibration block of the vibration motor is installed on the outside of the injection tube and coupled to the tube body through elastic support, which can transmit the kinetic energy of the head to the injection tube.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] 1. In the initial and lowered state, the injection pipe retracts into the inner cavity of the insertion pipe, and the injection hole is completely covered and protected by the pipe wall of the insertion pipe, preventing impurities such as mud and sand from entering and blocking the injection hole during the drilling process. After reaching the target grouting layer, the injection pipe extends out, exposing the injection hole, which improves the success rate and reliability of construction and avoids the delay in construction period and additional cleaning costs caused by pipe blockage.

[0014] 2. By integrating an electric heating antifreeze component into the injection pipe, it can preheat in advance or continuously keep warm during grouting in cold environments, effectively preventing the grout from thickening or freezing due to low temperature, ensuring the fluidity of the grout, and solving the ice blockage problem commonly encountered in winter or high-altitude and cold regions.

[0015] 3. During grouting, the high-frequency vibration generated by the vibrating motor is transmitted to the injection pipe through the elastic structure via the vibration component, causing the entire pipe to vibrate strongly. This promotes the grout to penetrate and diffuse more quickly and evenly into the surrounding soil. This method can achieve a larger effective reinforcement radius and more uniform pile strength with lower energy consumption, thereby significantly improving the grouting quality and foundation reinforcement effect. Attached Figure Description

[0016] Figure 1 A front view of the present invention is shown;

[0017] Figure 2 A cross-sectional view of the present invention is shown;

[0018] Figure 3 This utility model is shown Figure 2Enlarged view of point A in the middle;

[0019] Figure 4 An exploded view of this invention is shown.

[0020] Legend:

[0021] 10. Insertion pipe; 101. Grout outlet hole; 102. Guide bar; 11. Telescopic rod; 12. Injection pipe; 121. Injection hole; 122. Guide groove; 13. Grouting pump; 14. Grout storage tank; 15. Agitator; 16. Heat-conducting mounting base; 17. Electric heating tube; 18. Vibration motor. Detailed Implementation

[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a technical solution: a vibrating cement-soil mixing head antifreeze grouting conduit, including an insertion tube 10, a telescopic rod 11 fixedly connected to the bottom wall of the inner cavity of the insertion tube 10, and an injection tube 12 fixedly connected to the telescopic end of the telescopic rod 11. The injection tube 12 is slidably connected to the inner wall of the insertion tube 10. Several injection holes 121 are provided at the lower position of the outer ring of the injection tube 12. In the initial state and during the lowering process, the injection tube 12 retracts into the inner cavity of the insertion tube 10 and covers and protects the injection holes 121 with the help of the tube wall of the insertion tube 10, effectively preventing impurities such as soil and gravel from clogging the injection holes 121 during the lowering process.

[0024] Telescopic pole 11 can be a pneumatic or electric telescopic pole, such as those from Festo, Rexroth, and other manufacturers.

[0025] To achieve relative movement between the insertion tube 10 and the injection tube 12, the base end of the telescopic rod 11 is fixed to the bottom wall of the inner cavity of the insertion tube 10. The bottom center of the injection tube 12 is provided with an upwardly recessed cylindrical groove, and the telescopic end of the telescopic rod 11 extends upward and is fixedly connected to the inner wall of the cylindrical groove. This design allows the extension and retraction stroke of the injection tube 12 to be controlled by the telescopic rod 11.

[0026] The inner wall of the insertion tube 10 is provided with at least two guide strips 102, and the outer wall of the injection tube 12 is provided with at least two guide grooves 122 that cooperate with the guide strips 102.

[0027] The insertion tube 10, injection tube 12 and telescopic rod 11 are all made of high-strength stainless steel (e.g., 316L) and coated with a wear-resistant and corrosion-resistant coating. A hard nitriding layer is added to the inner cavity to improve corrosion resistance and wear resistance.

[0028] Furthermore, in order to form a complete grouting system, the top of the injection pipe 12 is connected to a grouting pump 13 via a delivery pipe. The grouting pump 13 is connected to a grout storage tank 14 via a suction pipe to extract cement grout. The top of the grout storage tank 14 is also equipped with a stirrer 15 to ensure the uniformity of the grout and prevent sedimentation.

[0029] Furthermore, the upper part of the outer wall of the insertion tube 10 is provided with at least a rectangular slurry outlet hole 101 for slurry discharge, and the bottom of the insertion tube 10 is designed to be conical, which helps to reduce the resistance when lowering the tube and facilitates the entire device to enter the soil.

[0030] Furthermore, in order to achieve the antifreeze function, a heating and antifreeze component is installed on the injection pipe 12. At the same time, in order to enhance the grouting effect and the penetration and mixing ability of the pipe in the soil, a vibration component is also installed on the outer wall of the insertion pipe 10.

[0031] Furthermore, a high-temperature wear-resistant sealing ring, such as a fluororubber sealing ring or a metal lip sealing ring, is provided at the sliding fit between the injection tube 12 and the insertion tube 10, and a mud-proof baffle is provided on the outside of the sealing ring to prevent mud and sand from entering the sealing cavity.

[0032] In the initial and lowered state, the injection pipe 12 is retracted into the inner cavity of the insertion pipe 10, and the injection hole 121 is completely covered and protected by the pipe wall of the insertion pipe 10, preventing impurities such as mud and sand from entering and blocking the injection hole 121 during the drilling process. After reaching the target grouting layer, the injection pipe 12 extends out, exposing the injection hole 121, which improves the success rate and reliability of construction and avoids delays in construction period and additional cleaning costs caused by pipe blockage.

[0033] Furthermore, to address the issue of grout freezing and clogging during construction in winter or cold regions, the heating and antifreeze component includes several heat-conducting mounting bases 16 with excellent thermal conductivity fixed on the inner wall of the cylindrical groove. Each heat-conducting mounting base 16 is equipped with an electric heating tube 17. When the external ambient temperature is too low, the electric heating tube 17 is activated, and heat is transferred to the injection pipe 12 through the heat-conducting mounting base 16, thereby effectively heating the grout that is about to be sprayed, ensuring its fluidity, and preventing ice blockage at the injection hole 121.

[0034] The electric heating tube 17 has a rated power of 500W and a total power of no more than 2kW. A temperature sensor is installed on the inner wall of the cylindrical groove to detect the surface temperature of the injection tube 12 in real time. When the ambient temperature is lower than the preset value, heating is automatically started; when the surface temperature of the injection tube reaches the preset value, power is automatically cut off; and the current temperature and working status are displayed on the LCD of the external control box.

[0035] The temperature sensor used is Sunflower's industrial temperature sensor for cement, or a custom sensor can be made according to actual needs.

[0036] By integrating an electric heating antifreeze component on the injection pipe 12, it can preheat in advance or continuously keep warm during the grouting process in cold environments, effectively preventing the grout from thickening or freezing due to low temperature, ensuring the fluidity of the grout, and solving the ice blockage problem commonly encountered in winter or high-altitude cold regions.

[0037] Furthermore, to improve the permeability and diffusion range of the grout in the soil, the vibration assembly includes a vibration motor 18 fixed to the outer wall of the insertion pipe 10. The vibration block of the vibration motor 18 is coupled to the outer pipe of the injection pipe 12 through an elastic support structure. When the vibration motor 18 is working, the high-frequency vibration generated is transmitted to the injection pipe 12 through the elastic support, and drives the entire injection pipe 12 to vibrate strongly. This vibration promotes the uniform and rapid penetration of the grout into the surrounding soil, thereby improving the grouting quality and reinforcement effect.

[0038] The vibration motor 18 operates at a frequency of 60Hz, with an amplitude of 0.5mm and a vibrating block mass of 0.2kg. The elastic support structure uses a stainless steel spring with a spring stiffness of 200N / m to ensure that the vibration energy is effectively coupled to the injection pipe 12 while avoiding excessive resonance. The outer shell of the vibration motor 18 is made of aluminum alloy and is equipped with a dustproof and waterproof protective cover with an IP68 rating.

[0039] To prevent the high-frequency vibration generated by the vibration motor 18 from being transmitted along the telescopic rod 11 to the base of the insertion tube 10 and causing fatigue damage, an elastic damping coupling is provided at the connection between the telescopic rod 11 and the injection tube 12. This coupling is composed of a polyurethane elastic ring and a rubber damping pad, which significantly reduces the vibration amplitude of the rod. In addition, a sliding support and a neoprene rubber damping pad are provided between the base of the telescopic rod 11 and the bottom wall of the inner cavity of the insertion tube 10, which further absorbs residual vibration energy by utilizing friction and material viscosity dissipation.

[0040] During grouting, the high-frequency vibration generated by the vibrating motor 18 is transmitted to the injection pipe 12 through the elastic structure via the vibration component, causing the entire pipe to vibrate strongly. This promotes the grout to penetrate and diffuse more quickly and evenly into the surrounding soil. This method can achieve a larger effective reinforcement radius and more uniform pile strength with lower energy consumption, thereby significantly improving the grouting quality and foundation reinforcement effect.

[0041] Work steps:

[0042] The assembled grouting conduit is connected to the drilling rig. At this time, the injection pipe 12 is in the retracted state, and the injection hole 121 below it is completely covered by the insertion pipe 10. The drilling rig is started, and the entire device is drilled into the ground to the predetermined depth by means of the conical head at the bottom of the insertion pipe 10. During this process, since the injection hole 121 is effectively protected, soil blockage can be completely avoided.

[0043] After reaching the target grouting layer, the drilling stops. With a slight upward movement of the drilling rig, the telescopic rod 11 is activated. The telescopic rod 11 drives the injection pipe 12 to slide upward along the guide bar 102 and extend the insertion pipe 10 until the telescopic rod 11 reaches its maximum stroke. During this process, the previously covered injection hole 121 is completely exposed.

[0044] Start the grouting pump 13. The high-pressure grout enters the injection pipe 12 through the delivery pipe and then is discharged from the grout outlet 101 and the injection hole 121.

[0045] At the same time as grouting begins, the vibration motor 18 is started. The powerful vibration can achieve better diffusion of the grout. If construction is carried out in a cold environment, the electric heating tube 17 is started in advance to preheat and keep the front end of the equipment and the grout warm, ensuring that the grouting process is smooth and unobstructed.

[0046] After grouting is completed, stop the grouting pump 13 and the vibrating motor 18, and retract the entire conduit upwards to prepare for the next use.

[0047] 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. A vibratory cement-soil mixing head antifreeze grouting conduit, comprising an insertion tube (10), characterized in that: A telescopic rod (11) is fixed to the bottom wall of the inner cavity of the insertion tube (10). An injection tube (12) that is slidably connected to the insertion tube (10) is fixed to the telescopic end of the telescopic rod (11). Several injection holes (121) are provided below the outer ring of the injection tube (12). The injection tube (12) extends into the inner cavity of the insertion tube (10) and covers the injection holes (121) with the help of the insertion tube (10). A heating and antifreeze component is installed on the injection tube (12). A vibration component for vibrating the injection tube (12) is installed on the outer wall of the insertion tube (10).

2. The antifreeze grouting conduit for a vibrating cement-soil mixing head according to claim 1, characterized in that: The top of the injection pipe (12) is connected to a grouting pump (13) via a delivery pipe. The grouting pump (13) is connected to a grout storage tank (14) via a suction pipe. A stirrer (15) is provided on the top of the grout storage tank (14).

3. The antifreeze grouting conduit for a vibratory cement-soil mixing head according to claim 1, characterized in that: The insertion tube (10) has a rectangular slurry outlet hole (101) on the upper part of its outer wall, and the bottom of the insertion tube (10) is conical.

4. The antifreeze grouting conduit for a vibratory cement-soil mixing head according to claim 1, characterized in that: The inner wall of the insertion tube (10) is provided with at least two guide strips (102), and the outer wall of the injection tube (12) is provided with at least two guide grooves (122) that cooperate with the guide strips (102).

5. The antifreeze grouting conduit for a vibrating cement-soil mixing head according to claim 1, characterized in that: The injection tube (12) has an upwardly recessed cylindrical groove at the bottom, and the telescopic rod (11) extends upward into the cylindrical groove. The telescopic end of the telescopic rod (11) is fixedly connected to the inner wall of the cylindrical groove.

6. A vibratory cement-soil mixing head antifreeze grouting conduit according to claim 1 or 5, characterized in that: The heating and antifreeze assembly includes several heat-conducting mounting seats (16) fixed to the inner wall of the cylindrical groove, and each heat-conducting mounting seat (16) is equipped with an electric heating tube (17).

7. The antifreeze grouting conduit for a vibrating cement-soil mixing head according to claim 1, characterized in that: The vibration assembly includes a vibration motor (18) fixed on the insertion tube (10). The vibration block of the vibration motor (18) is installed on the outside of the injection tube (12) and coupled to the tube body through elastic support, which can transmit the kinetic energy of the head to the injection tube (12).

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