Device capable of effectively preventing nozzle of powder spraying pile from being blocked and using method of device

Abstract

The invention relates to the technical field of powder spraying, in particular to a device capable of effectively preventing a nozzle of a powder spraying pile from being blocked and a using method of the device. The powder spraying pile comprises a supporting seat and a longitudinal frame arranged at the top of the supporting seat, a storage box used for storing a curing agent is further fixedly arranged at the top of the supporting seat, a sliding frame is arranged in the longitudinal frame in a sliding mode, and a powder spraying pile body is arranged in the sliding frame. High-temperature airflow is sprayed out, a curing agent is sprayed out along with wind flow, the curing agent is dried and impacted, the situation that the powdery curing agent is blocked before being sprayed out of the nozzle and the spraying uniformity is affected due to the fact that the powdery curing agent is moist and caked during storage is avoided, and the high-temperature airflow sprayed out of the rotary nozzle faces water in a soft foundation, so that water in the soft foundation close to the rotary nozzle can be dried. The contact between water and the curing agent at the nozzle of the rotary nozzle is reduced, the possibility of nozzle blockage is reduced, and meanwhile, when high-temperature air is exhausted, soft soil hardening can be further accelerated; and the rotary nozzle rotates, so that the subsequent mixing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of powder spraying, and in particular to a device capable of effectively preventing a powder spraying nozzle from being blocked and a use method thereof. Background Art

[0002] Powder injection piles, also known as reinforced soil piles, are a form of deep mixing method for strengthening foundations. It is a method of using powdered curing agent to mix soft foundations. The curing agent (cement) is driven by high-pressure wind to spray out from the nozzle, and the soft soil and curing agent are forced to mix on-site through a special mixing machinery. A series of physical and chemical reactions between the curing agent and the soft soil are used to harden the soft soil into a high-quality foundation with integrity, water stability and a certain strength. However, when the powder injection pile is in use, when the curing agent is sprayed out from the nozzle, the nozzle outlet is close to the water in the soft foundation, which makes the curing agent easily mixed with the water in the soft foundation, causing the cement to block the nozzle. In view of this, we propose a device that can effectively prevent the nozzle of the powder injection pile from being blocked and a method of using the device. Summary of the invention

[0003] The object of the present invention is to provide a device which can effectively prevent the nozzle of a powder injection pile from being blocked, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned object, one of the objects is that the present invention provides a device that can effectively prevent the nozzle of a powder spray pile from being blocked, comprising a support seat and a longitudinal frame arranged on the top of the support seat, a storage box for storing a curing agent is fixedly arranged on the top of the support seat, a sliding frame is slidably arranged inside the longitudinal frame, a powder spray pile body is arranged inside the sliding frame, and the powder spray pile body at least comprises:

[0005] A spiral drill rod is rotatably arranged at the bottom of the sliding frame, wherein the outer wall of the spiral drill rod near the bottom is provided with a notch, wherein the top of the spiral drill rod is connected to a conveying shell, and an air compressor is fixedly arranged on the top of the support seat, the output end of the air compressor is connected to a heating device, and an air pipe is connected between the heating device and the conveying shell;

[0006] A rotating nozzle, the rotating nozzle rotates inside the notch;

[0007] An airflow driving member is provided between the sliding frame and the rotating nozzle, is connected to the end of the air pipe through the airflow driving member, and drives the rotating nozzle to rotate along with the high-temperature airflow.

[0008] As a further improvement of the technical solution, a hydraulic rod is embedded in the top of the inner cavity of the longitudinal frame, and the piston rod end of the hydraulic rod is fixedly connected to a sliding frame, and the outer contour of the sliding frame is adapted to the inner cavity contour of the longitudinal frame.

[0009] As a further improvement of the technical solution, a rotational power source is provided between the auger rod and the sliding frame, and the rotational power source includes at least a driven wheel fixed near the top of the auger rod, a driving wheel is engaged with the outer wall of the driven wheel, and the end of the driving wheel is connected to the motor output shaft.

[0010] As a further improvement of the technical solution, a drill bit is provided at the bottom of the spiral drill rod, and the drill bit is in a "conical" shape;

[0011] The notch is located between the auger rod and the drill bit, and the diameter of the rotating nozzle is smaller than the diameters of the upper ends of the auger rod and the drill bit.

[0012] As a further improvement of the technical solution, a plurality of brush rods are rotatably provided inside the notch, and the brushes at the ends of the brush rods are in close contact with and brush the outlet of the rotating nozzle.

[0013] As a further improvement of the technical solution, the airflow driving member at least includes a rotating drum rotating inside the conveying shell, the upper end of the rotating drum extends out of the conveying shell and is rotatably connected to the interface at the end of the air pipe, and a plurality of rotating plates are arranged at equal intervals on the outer wall of the rotating drum, a plurality of air holes are opened at the end of the rotating plate, and the rotating plate is in an inwardly concave type for rotating for exhausting air from the plurality of air holes;

[0014] The lower end of the rotating drum is fixedly connected with a connecting rod, the connecting rod is fixed inside the rotating nozzle, and the top of the rotating nozzle is communicated with the inside of the auger rod.

[0015] As a further improvement of the technical solution, the conveying shell is fixed inside the sliding frame, a guide tube is provided between the storage box and the conveying shell, and the guide tube is located below the rotating plate.

[0016] As a further improvement of the technical solution, a plurality of bearing frames are fixedly provided on the inner wall of the auger rod, the outer wall of the connecting rod is fixed to the inner ring of the bearing frame, and a notch for the flow of airflow and curing agent is provided at the connection between the bearing frame and the inner wall of the auger rod.

[0017] The second object of the present invention is to provide a method for using a device that can effectively prevent the nozzle of a powder injection pile from being blocked, comprising the following steps:

[0018] S1. Aim the auger rod at the soft foundation and rotate it into the soft foundation;

[0019] S2. The high-pressure gas output from the output end of the air compressor is heated by a heating device, so that the high-temperature airflow is transported from the air pipe to the airflow driving member inside the conveying shell, and at the same time, the curing agent in the storage box is introduced into the conveying shell;

[0020] S3. The high-temperature airflow drives the airflow driving member to rotate, which drives the rotating nozzle to rotate, so that the rotating nozzle rotates to spray the curing agent.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the device that can effectively prevent the nozzle of the powder injection pile from being blocked, on the one hand, the curing agent passes through the conveying shell and the spiral drill rod in turn, flows into the rotating nozzle, and then sprays out high-temperature airflow, so that the curing agent is sprayed out with the wind flow, which plays a role in drying and impacting the curing agent, and avoids the powdered curing agent from being damp and agglomerated during storage, resulting in blockage before spraying from the nozzle and affecting the uniformity of spraying. In addition, the rotating nozzle sprays high-temperature airflow toward the water in the soft foundation, so that the water in the soft foundation close to the rotating nozzle can be dried, reducing the contact between the water and the curing agent at the nozzle of the rotating nozzle, reducing the possibility of nozzle blockage, and at the same time, as the high-temperature wind is discharged, it can further accelerate the hardening of the soft soil;

[0023] On the other hand, the high-temperature airflow drives the airflow driving member to rotate, which drives the rotating nozzle to rotate, so that the rotating nozzle rotates to spray the curing agent, so that the curing agent is sprayed more evenly in the soft base, which is beneficial to improve the subsequent mixing efficiency. Moreover, when only the high-temperature airflow is sprayed, the high-temperature airflow can be sprayed evenly, thereby improving the hardening efficiency of the soft base.

[0024] 2. In the device which can effectively prevent the nozzle of the powder injection pile from being blocked, the rotating nozzle is driven to rotate by the airflow driving member, and the spiral drill rod and the drill bit are driven to rotate by the rotating power source. The two rotate asynchronously, so that the rotating nozzle can brush between the brushes on the outer walls of multiple brush rods, so as to avoid agglomeration and blockage caused by the process of discharging high-temperature gas to dry moisture. Therefore, the brush rod further brushes the outlet of the rotating nozzle to prevent blockage, and the drill channel formed by the drill bit and the spiral drill rod forms a gap between the rotating nozzles, so as to avoid impurities such as silt in the soft foundation from clogging the outlet of the rotating nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention;

[0026] Figure 2 It is the assembly diagram of the main structure of the powder injection pile of the present invention;

[0027] Figure 3 It is a cross-sectional view of the main structure of the powder injection pile of the present invention;

[0028] Figure 4 It is a cross-sectional view of the main structure of the powder injection pile of the present invention;

[0029] Figure 5 It is a partial schematic diagram of the airflow driving member structure of the present invention;

[0030] Figure 6A diagram showing the rotation of the airflow driving member structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the drill bit and the spiral drill rod of the present invention;

[0032] Figure 8 It is a schematic cross-sectional view of the assembly of the sliding frame and the rotating power source of the present invention.

[0033] The meaning of each number in the figure is:

[0034] 100, support seat; 110, longitudinal frame; 120, sliding frame; 121, hydraulic rod;

[0035] 200, powder injection pile body; 210, auger rod; 211, conveying shell; 212, slot; 2120, brush rod; 213, drill bit; 214, bearing frame; 220, rotating nozzle; 230, air flow driving member; 231, rotating drum; 232, rotating plate; 233, air hole; 234, connecting rod; 240, rotating power source; 241, driven wheel; 242, driving wheel; 243, motor;

[0036] 300. Air compressor; 310. Heating equipment; 320. Air pipe; 400. Storage box; 410. Guide pipe. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figure 1-Figure 8As shown, on the one hand, this embodiment provides a device that can effectively prevent the nozzle of the powder injection pile from being blocked, including a support seat 100 and a longitudinal frame 110 arranged on the top of the support seat 100. A storage box 400 for storing a curing agent is also fixed on the top of the support seat 100. The curing agent can be cement. The cement reacts with the moisture in the soft soil to produce hydration products such as calcium silicate hydrate CSH. These hydration products gradually harden to form a strong cementing body. The calcium ions Ca²⁺ in the cement exchange ions with the sodium ions Na⁺ or potassium ions K⁺ in the soft soil to generate more stable compounds, which significantly improves the structure of the soft soil, improves the water stability of the foundation, reduces the foundation deformation caused by water changes, and forms a foundation with high strength and stability. A sliding frame 120 is provided inside the longitudinal frame 110 for sliding. A powder injection pile body 200 is provided inside the sliding frame 120. The powder injection pile body 200 is driven to slide inside the longitudinal frame 110 by the sliding frame 120, so that the powder injection pile body 200 can be extended into the foundation for powder injection operation. The powder injection pile body 200 at least includes:

[0040] The auger rod 210 is rotatably arranged at the bottom of the sliding frame 120, and a notch 212 is provided on the outer wall of the auger rod 210 near the bottom, wherein the top of the auger rod 210 is connected to a conveying housing 211, and an air compressor 300 is fixedly arranged on the top of the support seat 100, and the output end of the air compressor 300 is connected to a heating device 310, and an air pipe 320 is connected between the heating device 310 and the conveying housing 211;

[0041] A rotating nozzle 220, the rotating nozzle 220 rotates inside the slot 212;

[0042] The airflow driving member 230 is disposed between the sliding frame 120 and the rotating nozzle 220 , and is connected to the end of the air pipe 320 through the airflow driving member 230 , and drives the rotating nozzle 220 to rotate with the high-temperature airflow.

[0043] On the other hand, a method for using a device that can effectively prevent the nozzle of a powder injection pile from being blocked comprises the following steps:

[0044] S1, aligning the auger rod 210 with the soft foundation and rotating it to drill into the soft foundation;

[0045] S2, the high-pressure gas outputted from the output end of the air compressor 300 is heated by the heating device 310, so that the high-temperature gas flow is transported from the gas pipe 320 to the gas flow driving member 230 inside the transport housing 211, and at the same time, the curing agent in the storage box 400 is introduced into the inside of the transport housing 211;

[0046] S3. The high-temperature airflow drives the airflow driving member 230 to rotate, driving the rotating nozzle 220 to rotate, so that the rotating nozzle 220 rotates to spray the curing agent.

[0047] The present invention takes into account that when the powder injection pile is currently in use, the curing agent is sprayed out from the nozzle. Since the nozzle outlet is close to the water in the soft base, the curing agent is easily mixed with the water in the soft base, causing the cement to block the nozzle. Therefore, the high-pressure gas output from the output end of the air compressor 300 is heated by the heating device 310, so that the high-temperature airflow is transported from the air pipe 320 to the airflow driving member 230 inside the conveying shell 211. At the same time, the curing agent in the storage box 400 is introduced into the conveying shell 211. On the one hand, the curing agent passes through the conveying shell 211 and the auger rod 21 in sequence. 0, and then flows into the rotating nozzle 220 to eject high-temperature airflow, so that the curing agent is ejected with the wind flow, which plays a role in drying and impacting the curing agent powder, and avoids the powder curing agent from being damp and agglomerated during storage, which causes blockage before being ejected from the nozzle and affects the uniformity of ejection. In addition, the rotating nozzle 220 ejects high-temperature airflow toward the water in the soft foundation, so that the water in the soft foundation close to the rotating nozzle 220 can be dried, reducing the contact between the water and the curing agent at the nozzle of the rotating nozzle 220, and reducing the possibility of nozzle blockage. At the same time, as the high-temperature wind is discharged, the hardening of the soft soil can be further accelerated;

[0048] On the other hand, the high-temperature airflow drives the airflow driving member 230 to rotate, driving the rotating nozzle 220 to rotate, so that the rotating nozzle 220 rotates to spray the curing agent, so that the curing agent is sprayed more evenly in the soft base, which is beneficial to improving the subsequent mixing efficiency. Moreover, when only the high-temperature airflow is sprayed, the high-temperature airflow can be sprayed evenly, thereby improving the hardening efficiency of the soft base.

[0049] On the basis of the above, the specific structure is disclosed in detail:

[0050] First, the powder injection pile body 200 can be inserted into the soft foundation for powder injection and stirring to achieve soft foundation hardening. Figure 1 and Figure 2 As shown, a hydraulic rod 121 is embedded in the top of the inner cavity of the longitudinal frame 110, and the piston rod end of the hydraulic rod 121 is fixedly connected to the sliding frame 120. The outer contour of the sliding frame 120 is adapted to the inner cavity contour of the longitudinal frame 110. The hydraulic pump converts the mechanical energy of the prime mover into the pressure energy of the hydraulic oil through the hydraulic rod 121. The filtered hydraulic oil is sent into the hydraulic cylinder. The high-pressure oil pushes the piston to reciprocate in the cylinder, so that the piston rod connected to the sliding frame 120 drives the entire powder spray pile body 200 to move up and down, so that it can be inserted into the soft foundation for powder spraying operation.

[0051] Next, the powder injection pile body 200 can be easily inserted into the soft base, and after the powder is sprayed, the soft base and the fixing agent are mixed, such as Figure 8As shown, a rotating power source 240 is also required to be provided between the auger rod 210 and the sliding frame 120. The rotating power source 240 at least includes a driven wheel 241 fixed near the top of the auger rod 210. The outer wall of the driven wheel 241 is meshed with a driving wheel 242. The end of the driving wheel 242 is connected to the output shaft of a motor 243, which is fixed to the outer wall of the sliding frame 120 through the outer shell of the motor 243. The output shaft of the motor 243 drives the driving wheel 242 to rotate at the bottom of the sliding frame 120, and the meshing drives the driven wheel 241 to rotate, so that the auger rod 210 can be rotated to drill into the soft base, and the fixing agent and the soft base can be further mixed during the rotation process.

[0052] Then, the front end of the auger rod 210 has a greater strength for drilling into the soft foundation first, so a drill bit 213 is provided at the bottom of the auger rod 210, and the drill bit 213 is in a "conical" shape;

[0053] The notch 212 is located between the auger rod 210 and the drill bit 213. The diameter of the rotating nozzle 220 is smaller than the diameters of the upper ends of the auger rod 210 and the drill bit 213, so that the "conical" drill bit 213 is preferentially inserted into the soft foundation. The front end of the sharp drill bit 213 has a strong impact force, which is conducive to laying a good foundation for entering the soft foundation. As the drill bit 213 drives the auger rod 210 to extend, the drill channel formed by the drill bit 213 and the auger rod 210 forms a gap between the rotating nozzle 220, thereby preventing impurities such as silt in the soft foundation from clogging the outlet of the rotating nozzle 220.

[0054] Moreover, on the basis of the above, in order to further improve the anti-blocking effect, such as Figure 7 As shown, a plurality of brush rods 2120 are provided inside the notch 212 to rotate, and the brushes at the ends of the brush rods 2120 are fitted to brush the outlet of the rotating nozzle 220, and the rotating nozzle 220 is driven to rotate by the airflow driving member 230, and the rotating power source 240 drives the auger rod 210 and the drill bit 213 to rotate, and the two rotate asynchronously, so that the rotating nozzle 220 can brush between the brushes on the outer walls of the plurality of brush rods 2120, avoiding caking and blockage during the process of discharging high-temperature gas to dry moisture. Therefore, the brush rod 2120 further brushes the outlet of the rotating nozzle 220 to prevent blockage.

[0055] It is worth noting that in order to realize that the rotating nozzle 220 can rotate with the airflow driving member 230 and improve the uniformity of powder spraying, it is necessary to disclose the structure of the airflow driving member 230 in detail, such as Figure 5-Figure 6 As shown, the airflow driving member 230 at least includes a rotating drum 231 rotating inside the conveying housing 211, the upper end of the rotating drum 231 extends out of the conveying housing 211, and is rotatably connected to the interface at the end of the air pipe 320, and a plurality of rotating plates 232 are arranged on the outer wall of the rotating drum 231 at equal intervals, and a plurality of air holes 233 are opened at the end of the rotating plate 232, and the rotating plate 232 is in an inwardly concave type for the plurality of air holes 233 to exhaust air and rotate;

[0056] The lower end of the rotating drum 231 is fixedly connected to a connecting rod 234, which is fixed inside the rotating nozzle 220, and the top of the rotating nozzle 220 is connected to the inside of the auger rod 210. The high-temperature airflow ejected through the air pipe 320 enters the rotating drum 231, and the airflow is diverted by multiple rotating plates 232 and discharged from multiple air holes 233. The rotating plate 232 is concave inwardly to form a rotating airflow. Figure 6 The rotating drum 231 is driven to rotate in the direction of the arrow, so that the connecting rod 234 drives the rotating nozzle 220 to rotate, which is conducive to achieving more uniform spraying of the curing agent and the high-temperature airflow.

[0057] Furthermore, when curing agent is stored in the storage box 400, the storage box 400 can be introduced into the interior of the conveying shell 211, and then enter the interior of the rotating nozzle 220 for discharge, so that the conveying shell 211 is fixed inside the sliding frame 120. A guide pipe 410 is provided between the storage box 400 and the conveying shell 211, and the guide pipe 410 is located below the rotating plate 232. The air pressure difference generated by the air compressor 300 drives the curing agent from the guide pipe 410 into the interior of the conveying shell 211. Under the action of its own gravity and airflow guidance, the curing agent enters the interior of the rotating nozzle 220 along the inside of the auger rod 210, and is then sprayed out to perform a soft base curing operation.

[0058] Specifically, the high-pressure airflow generated by the air compressor 300 carries high temperature and drives the rotating plate 232 to rotate, thereby driving the rotating nozzle 220 to rotate through the connecting rod 234. During this process, if the connecting rod 234 is suspended or fits against the inner wall of the auger rod 210, the load of rotation will increase. Therefore, a plurality of bearing frames 214 are fixedly provided on the inner wall of the auger rod 210, and the outer wall of the connecting rod 234 is fixed to the inner ring of the bearing frame 214. A notch for the flow of airflow and curing agent is provided at the connection between the bearing frame 214 and the inner wall of the auger rod 210. The working principle of the bearing frame 214 is to reduce the friction between mechanical parts by utilizing the rolling of the rolling body between the inner and outer rings, so as to achieve support for the rotating rod 234 when rotating, reduce friction resistance, improve the rotation effect, and the notch does not affect the flow of airflow and curing agent.

[0059] In summary, when the present invention is used:

[0060] First, the front end of the sharp drill bit 213 is aligned with the soft foundation, and the output shaft of the motor 243 drives the driving wheel 242 to rotate at the bottom of the sliding frame 120, and the driven wheel 241 is driven to rotate by meshing, so that the auger rod 210 can rotate and drill into the soft foundation;

[0061] At the same time, the heating device 310 heats the high-pressure gas output from the output end of the air compressor 300, so that the high-temperature airflow ejected from the high-temperature airflow pipe 320 first enters the rotating drum 231, and the airflow is diverted by the multiple rotating plates 232 and then discharged from the multiple air holes 233. The rotating plate 232 is concave inwardly to form a rotating airflow. Figure 6 The rotating drum 231 is driven to rotate in the direction of the arrow, so that the connecting rod 234 drives the rotating nozzle 220 to rotate, and the air flow is delivered to the inside of the delivery shell 211. At the same time, the pressure difference generated by the air compressor 300 drives the curing agent from the guide pipe 410 into the inside of the delivery shell 211. Under the action of its own gravity and air flow guidance, the curing agent enters the inside of the rotating nozzle 220 along the inside of the auger rod 210, and is then sprayed out to perform the soft base curing operation.

[0062] The working principle of the air compressor 300 is known to those skilled in the art. When the air compressor 300 is started, the moving parts such as the piston or screw inside the air compressor 300 start to move, generating a negative pressure area, so that the external air is sucked into the compressor through the air inlet. In this process, the air inlet filter will filter out dust and impurities in the air to protect the cleanliness of the compressor and extend its service life. The sucked air is then compressed by the moving parts (such as the piston, screw, etc.) inside the compressor. In this process, the air volume is reduced and the pressure is increased. The compressed and cooled high-pressure air is stored in the air storage tank or directly transported to the inside of the heating device 310 through a pipeline.

[0063] The heating device 310 generates heat by energizing the electric heating network, so that the airflow generated by the air compressor 300 passes through the electric heating network and is transported from the air pipe 320 with heat. When the electric heating network is in use, it can cooperate with the control system to control the temperature of the electric heating network so that when the high-temperature airflow is ejected from the rotating nozzle 220, the nearby moisture can be dried.

[0064] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for effectively preventing a nozzle of a powder injection pile from being blocked, comprising a support base (100) and a longitudinal frame (110) arranged on the top of the support base (100), wherein a storage box (400) for storing a curing agent is fixedly arranged on the top of the support base (100), characterized in that: A sliding frame (120) is slidably disposed inside the longitudinal frame (110), and a powder injection pile body (200) is disposed inside the sliding frame (120). The powder injection pile body (200) comprises at least: A spiral drill rod (210) is rotatably arranged at the bottom of the sliding frame (120), wherein the outer wall of the spiral drill rod (210) near the bottom is provided with a notch (212), wherein the top of the spiral drill rod (210) is connected to a conveying shell (211), and an air compressor (300) is fixedly arranged on the top of the support seat (100), the output end of the air compressor (300) is connected to a heating device (310), and an air pipe (320) is connected between the heating device (310) and the conveying shell (211); A rotating nozzle (220), the rotating nozzle (220) rotating inside the notch (212); An airflow driving member (230) is disposed between the sliding frame (120) and the rotating nozzle (220), is connected to the end of the air pipe (320) through the airflow driving member (230), and drives the rotating nozzle (220) to rotate along with the high-temperature airflow.

2. The device for effectively preventing nozzle blockage of powder injection pile according to claim 1, characterized in that: A hydraulic rod (121) is embedded in the top of the inner cavity of the longitudinal frame (110), and the piston rod end of the hydraulic rod (121) is fixedly connected to the sliding frame (120), and the outer contour of the sliding frame (120) is compatible with the inner cavity contour of the longitudinal frame (110).

3. The device for effectively preventing nozzle blockage of powder injection pile according to claim 2, characterized in that: A rotational power source (240) is provided between the auger rod (210) and the sliding frame (120), the rotational power source (240) comprising at least a driven wheel (241) fixed near the top of the auger rod (210), a driving wheel (242) meshing on the outer wall of the driven wheel (241), and an output shaft of a motor (243) connected to the end of the driving wheel (242).

4. The device for effectively preventing nozzle blockage of powder injection pile according to claim 3 is characterized in that: A drill bit (213) is provided at the bottom of the spiral drill rod (210), and the drill bit (213) is in a "conical" shape; The notch (212) is located between the auger rod (210) and the drill bit (213), and the diameter of the rotating nozzle (220) is smaller than the diameters of the upper ends of the auger rod (210) and the drill bit (213).

5. The device for effectively preventing nozzle blockage of powder injection pile according to claim 4 is characterized in that: A plurality of brush rods (2120) are rotatably arranged inside the notch (212), and the brushes at the ends of the brush rods (2120) are adapted to brush the outlet of the rotating nozzle (220).

6. The device for effectively preventing nozzle blockage of powder injection pile according to claim 5, characterized in that: The airflow driving member (230) at least comprises a rotating drum (231) rotating inside the conveying housing (211), the upper end of the rotating drum (231) extending out of the conveying housing (211) and being rotatably connected to an interface at the end of the air pipe (320), a plurality of rotating plates (232) being arranged at equal intervals on the outer wall of the rotating drum (231), a plurality of air holes (233) being arranged at the end of the rotating plate (232), and the rotating plate (232) being inwardly concave and rotating for exhausting air from the plurality of air holes (233); The lower end of the rotating drum (231) is fixedly connected to a connecting rod (234), the connecting rod (234) is fixed inside the rotating nozzle (220), and the top of the rotating nozzle (220) is connected to the inside of the auger rod (210).

7. The device for effectively preventing nozzle blockage of powder injection pile according to claim 6 is characterized in that: The conveying shell (211) is fixed inside the sliding frame (120), a guide tube (410) is provided between the storage box (400) and the conveying shell (211), and the guide tube (410) is located below the rotating plate (232).

8. The device for effectively preventing nozzle blockage of powder injection pile according to claim 7 is characterized in that: A plurality of bearing frames (214) are fixedly provided on the inner wall of the auger rod (210); the outer wall of the connecting rod (234) is fixed to the inner ring of the bearing frame (214); and a notch for the flow of airflow and curing agent is provided at the connection between the bearing frame (214) and the inner wall of the auger rod (210).

9. A method for using a device capable of effectively preventing a nozzle of a powder injection pile from being blocked, applied to the device capable of effectively preventing a nozzle of a powder injection pile from being blocked as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1, aligning the auger rod (210) with the soft foundation and rotating it to drill into the soft foundation; S2, heating the high-pressure gas output from the output end of the air compressor (300) by means of a heating device (310), so that the high-temperature gas flow is transported from the gas pipe (320) to the gas flow driving member (230) inside the transport housing (211), and at the same time, the curing agent in the storage box (400) is introduced into the interior of the transport housing (211); S3. The high-temperature airflow drives the airflow driving member (230) to rotate, thereby driving the rotating nozzle (220) to rotate, so that the rotating nozzle (220) sprays the curing agent while rotating.

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