A spiral drilling machine for railway construction

Abstract

This invention belongs to the technical field of rotary drilling equipment, and particularly relates to a spiral drilling rig for railway construction. It includes a frame and a controller mounted on the end face of the frame. A winch drive mechanism is installed on the side wall of the frame, a hydraulic drive mechanism is installed on the movable end of the winch drive mechanism, and a rotary drive mechanism is installed on the telescopic end of the hydraulic drive mechanism. A spiral drill rod is disposed below the rotary drive mechanism. This invention can assist in heat dissipation and cooling of the spiral drill rod, ensuring continuous and stable drilling. It can also automatically adjust the drill rod recovery speed based on the looseness of the soil layer, ensuring uniform grout injection and guaranteeing grouting quality. Simultaneously, it can appropriately increase the grouting temperature in loose soil layers, improving the grout filling effect. Furthermore, it can clean residual soil from the spiral drill rod after construction, preventing it from affecting subsequent use.

Description

Technical Field

[0001] This invention belongs to the technical field of rotary drilling equipment, and in particular relates to a spiral drilling machine for railway construction. Background Technology

[0002] In railway construction, lines often traverse complex geological areas, such as soft soil and sandy soil. Traditional construction methods are difficult to meet the requirements of high efficiency and stability. Spiral drilling rigs have emerged to address this need. They can quickly drill to the designed depth, accurately inject grout, effectively reinforce the foundation, enhance the bearing capacity and stability of the roadbed, and ensure the long-term safe operation of the railway. They have become key equipment in railway construction and are widely used.

[0003] Currently, spiral drilling rigs typically drill holes to a certain depth using spiral drill rods. Then, through grouting channels pre-reserved inside the drill rods, an appropriate amount of grout is pumped into the holes using external grouting equipment. This achieves the effect of rapid completion of drilling and grouting, and is less prone to hole collapse. It has good performance, such as the spiral drilling rig for railway construction disclosed in patent publication number CN118273646B.

[0004] During the operation of auger drilling rigs, the varying looseness of soil layers at different depths within the drilled hole, coupled with a fixed drill rod return speed and grouting speed, can lead to numerous problems. In looser soil layers, due to their large pores and high water absorption, a fixed grouting speed may not be sufficient to fill the pores, resulting in incomplete grouting, forming voids or pores, and affecting the bearing capacity and stability of the foundation. In denser soil layers, at the same grouting speed, the grout may accumulate locally due to difficulty in penetration, causing waste and affecting the uniformity of grout distribution, thus impacting the quality of drilling and grouting and potentially failing to meet the high-quality requirements of railway construction. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a spiral drilling machine for railway construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a railway construction spiral drilling machine, comprising a frame and a controller mounted on the end face of the frame, a winch drive mechanism mounted on the side wall of the frame, a hydraulic drive mechanism mounted on the movable end of the winch drive mechanism, a rotary drive mechanism mounted on the telescopic end of the hydraulic drive mechanism, and a spiral drill rod disposed below the rotary drive mechanism, further comprising:

[0007] A fixed hollow column is inserted into the upper end of the rod wall of the auger drill rod;

[0008] Multiple vent pipes are fixedly inserted into the bottom of the fixed hollow column, and the lower end of each vent pipe passes through the spiral blade of the spiral drill rod and extends to the upper side of the drill bit of the spiral drill rod.

[0009] An air supply unit is installed on the outside of the fixed hollow column and is used to supply air to the inside of each air pipe.

[0010] A pressure measurement and control mechanism is installed on one side of the fixed hollow column and is connected to the air supply unit. The pressure measurement and control mechanism is electrically connected to the hoist drive mechanism through a controller.

[0011] A heating unit is located above the auger drill rod, and the rotary drive mechanism is connected to the auger drill rod via the heating unit. A grouting pipe is installed on the side wall of the heating unit. An opening and closing assembly is installed inside the air pressure measurement and control mechanism, and the controller controls the heating unit to work according to the electrical signal output by the opening and closing assembly.

[0012] A cleaning unit is installed inside each of the ventilation pipes and is used to regulate the air outlet direction of each ventilation pipe.

[0013] Preferably, the air supply unit includes a hollow sleeve fitted on the outside of the auger drill rod, and the hollow sleeve is rotatably connected to the outer wall of the fixed hollow column. An annular air supply gap is provided between the hollow sleeve and the outer wall of the fixed hollow column, and a sealing assembly is provided between the hollow sleeve and the outer wall of the fixed hollow column. Multiple vent holes are opened on the inner wall of the annular air supply gap. A fixing column is fixedly provided between the hollow sleeve and the housing side wall of the rotary drive mechanism. An air pump is fixedly installed on the housing side wall of the rotary drive mechanism, and the air outlet end of the air pump is connected to the annular air supply gap.

[0014] Preferably, the air pressure monitoring and control mechanism includes a mounting cover fixedly installed on the outer wall of the hollow sleeve, and an air pressure detector is fixedly inserted into the side wall of the mounting cover. The detection end of the air pressure detector is located on the inner side of the mounting cover. The side wall of the annular air supply gap has a communicating hole connected to the mounting cover. An insulating hollow plate is fixedly installed on the side wall of the housing of the hoisting drive mechanism. An electromagnetic push rod is fixedly installed on the inner wall of the insulating hollow plate. The controller controls the operation of the electromagnetic push rod according to the electrical signal output by the air pressure detector. An insulating block is installed on the telescopic end of the electromagnetic push rod, and a conductive ring is fixedly inserted into the side wall of the insulating block. A resistance rod is fixedly installed on the inner wall of the insulating hollow plate on the side opposite to the electromagnetic push rod, and the inner wall of the conductive ring slides in contact with the rod wall of the resistance rod. The resistance rod and the conductive ring are electrically connected to the hoisting drive mechanism through the controller.

[0015] Preferably, the heating unit includes a heating box fixedly inserted into the top of the auger rod, the grouting channel of the auger rod is connected to the interior of the heating box, the grouting pipe is fixedly inserted into the side wall of the heating box, multiple vertical heating rods are fixedly installed inside the heating box, the heating rods are electrically connected to the controller, a transmission rod is fixedly installed on the top of the heating box, and the rotation drive mechanism drives the auger rod to rotate through the transmission rod and the heating box.

[0016] Preferably, the opening and closing assembly includes an elastic support assembly fixedly installed on the inner wall of the insulating hollow plate, and a conductive strip is fixedly installed on the side wall of the elastic support assembly. A conductive post is fixedly installed on the side wall of the insulating block, and one end of the conductive post slides in contact with the side wall of the conductive strip. When the conductive post contacts the conductive strip, the controller controls each heating rod to work.

[0017] Preferably, the cleaning unit includes a rotating tube disposed inside each vent pipe. A sealing rubber sleeve is fixedly installed on the inner wall of each vent pipe, and the rotating tube is rotatably disposed inside the sealing rubber sleeve. The rotating tube, together with the side wall of the vent pipe and the sealing rubber sleeve on the same side, has multiple sets of air jet holes. A normally open solenoid valve is fixedly installed inside each vent pipe at a position below the sealing rubber sleeve on the same side, and the normally open solenoid valve is electrically connected to the controller. An angle adjustment component is installed on each rotating tube.

[0018] Preferably, the angle adjustment assembly includes sprockets fixedly sleeved on the upper side of the outer wall of each rotating tube, and each sprocket is connected by a chain drive. A drive motor is fixedly installed at the bottom of the fixed hollow column, and the drive motor is located inside the hollow sleeve. The output end of the drive motor drives the rotating tube on the same side to rotate through a gear transmission assembly. The drive motor is electrically connected to the controller.

[0019] Preferably, the jet holes in each group are all located on the pipe wall of the same side vent pipe away from the auger rod, and the multiple jet holes in the same group are evenly distributed in a fan shape within a ° range of the pipe wall of the same side vent pipe.

[0020] Compared with existing technologies, the advantages of a railway construction spiral drilling machine are:

[0021] 1. Through the coordinated operation of the frame, controller, winch drive mechanism, hydraulic drive mechanism, rotary drive mechanism, auger drill rod, fixed hollow column, vent pipe, and air supply unit, the auger drill rod can be assisted in heat dissipation and cooling during drilling, facilitating continuous and stable drilling. The accompanying air pressure monitoring and control mechanism can automatically adjust the auger drill rod recovery speed based on the looseness of the soil layer during grouting. This allows for increased grout injection in loose soil layers, ensuring thorough filling, while reducing grout injection in dense soil layers, maintaining uniform grout injection and ensuring grouting quality.

[0022] 2. By using the heating unit, the temperature of the injected grout can be appropriately increased when grouting loose soil layers, making the grout easier to flow and fill the loose gaps, thereby further improving the adequacy of grouting loose soil layers.

[0023] 3. The cleaning unit can help clean the soil residue on the surface of the auger blade after drilling and grouting, thus avoiding the soil from drying and hardening on the surface of the auger blade and affecting subsequent use. The cleaning is convenient. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of a railway construction spiral drilling machine provided by the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of a fixed hollow column of a railway construction spiral drilling machine provided by the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the insulating hollow plate of a railway construction spiral drilling machine provided by the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the heating box of a railway construction spiral drilling machine provided by the present invention;

[0028] Figure 5 This invention provides a spiral drilling machine for railway construction. Figure 3 Enlarged view of the structure of section A;

[0029] Figure 6 This is a top view schematic diagram of the rotating pipe and ventilation pipe of a railway construction spiral drilling machine provided by the present invention;

[0030] Figure 7 This invention provides a spiral drilling machine for railway construction. Figure 2 Enlarged view of the structure of section B;

[0031] Figure 8 This is a top view schematic diagram of the connection structure of the rotating pipes of a railway construction spiral drilling machine provided by the present invention.

[0032] In the diagram: 1. Frame, 2. Controller, 3. Hoisting drive mechanism, 4. Hydraulic drive mechanism, 5. Rotary drive mechanism, 6. Spiral drill rod, 7. Fixed hollow column, 8. Vent pipe, 9. Air supply unit, 91. Hollow sleeve, 92. Annular air supply gap, 93. Sealing assembly, 94. Vent hole, 95. Fixed column, 96. Air pump, 10. Air pressure monitoring and control mechanism, 101. Mounting cover, 102. Air pressure detector, 103. Connecting hole, 104. Insulating hollow plate, 105. Electromagnetic push rod, 106. Insulating block, 1 07 Conductive ring, 108 Resistance rod, 11 Heating unit, 111 Heating box, 112 Heating rod, 113 Transmission rod, 12 Grouting pipe, 13 Opening and closing assembly, 131 Elastic support assembly, 132 Conductive strip, 133 Conductive column, 14 Cleaning unit, 141 Rotary tube, 142 Sealing rubber sleeve, 143 Air jet hole, 144 Normally open solenoid valve, 15 Angle adjustment assembly, 151 Sprocket, 152 Chain, 153 Drive motor, 154 Gear transmission assembly. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] like Figures 1-8As shown, a railway construction spiral drilling machine includes a frame 1 and a controller 2 installed on the end face of the frame 1. A winch drive mechanism 3 is installed on the side wall of the frame 1. A hydraulic drive mechanism 4 is installed on the movable end of the winch drive mechanism 3. A rotary drive mechanism 5 is installed on the telescopic end of the hydraulic drive mechanism 4. A spiral drill rod 6 is arranged below the rotary drive mechanism 5. The winch drive mechanism 3 mainly includes a winch drive motor, a mounting box, a winding roller, a steel strand, a directional wheel, and other components. The drive motor drives the winding roller to wind the steel strand. The hydraulic drive mechanism 4 mainly includes a hydraulic cylinder, a mounting base, and other components. The rotary drive mechanism 5 mainly includes a reduction motor, a gear transmission structure, and other components. The reduction motor drives the transmission rod 113 to rotate through the gear transmission structure and other components. The machine also includes: a fixed hollow column 7, which is fixedly inserted into the upper end of the rod wall of the spiral drill rod 6; and multiple vent pipes 8, which are all fixedly inserted into the bottom of the fixed hollow column 7, with the lower end of each vent pipe 8 penetrating the spiral blade of the spiral drill rod 6 and extending outwards. Above the drill bit of the auger rod 6, an air supply unit 9 is installed on the outside of the fixed hollow column 7 to supply air to the interior of each air pipe 8. The air supply unit 9 includes a hollow sleeve 91 fitted onto the outside of the auger rod 6, and the hollow sleeve 91 is rotatably connected to the outer wall of the fixed hollow column 7. An annular air supply gap 92 is provided between the hollow sleeve 91 and the outer wall of the fixed hollow column 7, and a sealing assembly 93 is provided between the hollow sleeve 91 and the outer wall of the fixed hollow column 7. The inner wall of the annular air supply gap 92 has an opening. Multiple vent holes 94 are provided. A fixed column 95 is fixed between the hollow sleeve 91 and the side wall of the housing of the rotary drive mechanism 5. An air pump 96 is fixedly installed on the side wall of the housing of the rotary drive mechanism 5, and the air outlet of the air pump 96 is connected to the annular air supply gap 92. The sealing assembly 93 includes components such as annular sealing plate and sealing rubber ring. The hollow sleeve 91 and the fixed hollow column 7 are rotatably connected through a sealing bearing. With the cooperation of the sealing assembly 93, airflow can be prevented from being discharged between the side walls of the hollow sleeve 91 and the fixed hollow column 7.

[0035] The air pressure monitoring and control mechanism 10 is located on one side of the fixed hollow column 7 and is connected to the air supply unit 9. The air pressure monitoring and control mechanism 10 is electrically connected to the hoisting drive mechanism 3 through the controller 2. The air pressure monitoring and control mechanism 10 includes a mounting cover 101 fixedly installed on the outer wall of the hollow sleeve 91, and an air pressure detector 102 is fixedly inserted into the side wall of the mounting cover 101. The detection end of the air pressure detector 102 is located on the inner side of the mounting cover 101. A connecting hole 103 communicating with the mounting cover 101 is opened on the side wall of the annular air supply gap 92. An insulating hollow plate 104 is fixedly installed on the side wall of the housing of the hoisting drive mechanism 3. The inner wall of the insulating hollow plate 104 is... An electromagnetic push rod 105 is fixedly installed. The controller 2 controls the operation of the electromagnetic push rod 105 according to the electrical signal output by the air pressure detector 102. An insulating block 106 is installed at the telescopic end of the electromagnetic push rod 105, and a conductive ring 107 is fixedly inserted into the side wall of the insulating block 106. A resistor rod 108 is fixedly installed on the inner wall of the insulating hollow plate 104 on the opposite side of the electromagnetic push rod 105, and the inner wall of the conductive ring 107 slides in contact with the rod wall of the resistor rod 108. The resistor rod 108 and the conductive ring 107 are electrically connected to the hoisting drive mechanism 3 through the controller 2. The air pressure detector 102 can convert air pressure into an electrical signal and output it to the controller 2.

[0036] The heating unit 11 is located above the auger rod 6, and the rotary drive mechanism 5 is connected to the auger rod 6 via the heating unit 11. A grouting pipe 12 is installed on the side wall of the heating unit 11. An opening and closing assembly 13 is installed inside the air pressure control mechanism 10, and the controller 2 controls the operation of the heating unit 11 according to the electrical signal output by the opening and closing assembly 13. The heating unit 11 includes a heating box 111 fixedly inserted into the top of the auger rod 6. The grouting channel of the auger rod 6 is connected to the inside of the heating box 111. The grouting pipe 12 is fixedly inserted into the side wall of the heating box 111. Multiple vertical electric heating rods 112 are fixedly installed inside the heating box 111. The electric heating rods 112 are electrically connected to the controller 2. A transmission rod 113 is fixedly installed on the top of the heating box 111, and the rotary drive mechanism 5 drives the auger rod 6 to rotate via the transmission rod 113 and the heating box 111. The heating temperature of the electric heating rods 112 is in the range of 40°C to 60°C.

[0037] The opening and closing assembly 13 includes an elastic support assembly 131 fixedly installed on the inner wall of the insulating hollow plate 104, and a conductive strip 132 is fixedly installed on the side wall of the elastic support assembly 131. A conductive post 133 is fixedly installed on the side wall of the insulating block 106, and one end of the conductive post 133 slides in contact with the side wall of the conductive strip 132. When the conductive post 133 contacts the conductive strip 132, the controller 2 controls each heating rod 112 to work. The elastic support assembly 131 includes an insulating fixed plate, an elastic pad, and an insulating movable plate. The insulating fixed plate is installed on the inner wall of the insulating hollow plate 104, the elastic pad is disposed between the insulating movable plate and the insulating fixed plate, and the conductive post 133 is installed on the side wall of the insulating movable plate.

[0038] The cleaning unit 14 is installed inside each vent pipe 8 and is used to regulate the air outlet direction of each vent pipe 8. The cleaning unit 14 includes a rotating tube 141 disposed inside each vent pipe 8. A sealing rubber sleeve 142 is fixedly installed on the inner wall of each vent pipe 8, and the rotating tube 141 is rotatably disposed inside the sealing rubber sleeve 142. The rotating tube 141, together with the side wall of the vent pipe 8 on the same side and the sealing rubber sleeve 142, has multiple sets of air jet holes 143. The interior of each vent pipe 8 is located on the same side of the sealing rubber sleeve. Normally open solenoid valves 144 are fixedly installed below the rubber sleeve 142, and the normally open solenoid valves 144 are electrically connected to the controller 2. Each rotating tube 141 is equipped with an angle adjustment component 15. Each group of air jet holes 143 is located on the pipe wall of the same side vent pipe 8 away from the spiral drill rod 6. Multiple air jet holes 143 in the same group are evenly distributed in a fan shape within a 150° range on the pipe wall of the same side vent pipe 8. The sealing rubber sleeve 142 can prevent airflow from flowing through the gap between the rotating tube 141 and the vent pipe 8.

[0039] The angle adjustment assembly 15 includes sprockets 151 fixedly sleeved on the upper side of the outer wall of each rotating tube 141, and each sprocket 151 is connected by a chain 152. A drive motor 153 is fixedly installed at the bottom of the fixed hollow column 7, and the drive motor 153 is located inside the hollow sleeve 91. The output end of the drive motor 153 drives the rotating tube 141 on the same side to rotate through the gear transmission assembly 154. The drive motor 153 is electrically connected to the controller 2. The gear transmission assembly 154 includes components such as a moving gear and a stationary gear. The moving gear is installed at the output end of the drive motor 153, and the stationary gear is sleeved on the outer wall of the rotating tube 141 on the same side. The moving gear and the stationary gear mesh with each other.

[0040] The operating principle of the present invention is explained as follows: During drilling, the rotary drive mechanism 5 drives the spiral drill rod 6 to rotate through the transmission rod 113 and the heating box 111, while the hydraulic drive mechanism 4 drives the spiral drill rod 6 to move downward, thereby enabling drilling. After the hydraulic drive mechanism 4 drives the spiral drill rod 6 to move downward a certain distance (this distance is set based on the stroke driven by the hydraulic drive mechanism 4), the winch drive mechanism 3 drives the hydraulic drive mechanism 4 to move downward a certain distance, and then the hydraulic drive mechanism 4 continues to drive the spiral drill rod 6 to move downward, working alternately to drill holes of a predetermined depth. During the drilling process, the controller 2 starts the heat dissipation work. At this time, the controller 2 controls the air pump 96 to work. The air pump 96 draws in the external airflow and delivers it to the annular air supply gap 92, then enters the fixed hollow column 7 through each vent hole 94, and finally sprays out through the bottom of each vent pipe 8. Under the action of the flowing airflow, the spiral drill rod 6 can be cooled down, which can facilitate the continuous and stable drilling of the spiral drill rod 6.

[0041] After drilling is completed, the discharge end of the external slurry pumping equipment is connected to the grouting pipe 12 through a hose. Then, the grouting operation is started by the controller 2. After the grouting operation is started, the controller 2 will control the hoisting mechanism to pull the spiral drill rod 6 back through the hydraulic drive mechanism 4, the transmission rod 113 and the heating box 111. Meanwhile, the external slurry pumping equipment supplies slurry at the same time. The slurry enters the heating box 111 through the grouting pipe 12 and is transported into the hole through the grouting channel of the spiral drill rod 6. The slurry will fill the hole, and the spiral drill rod 6 will move back synchronously under the action of the hoisting drive mechanism 3.

[0042] During the retraction of the auger rod 6, the controller 2 controls the air pump 96 to continue operating. When the lower ends of each air pipe 8 move to a relatively loose soil layer, the loose soil has larger pores, making it easier for air to flow out. Therefore, the airflow delivered by the air pump 96 to the annular air supply gap 92 can be discharged in time. At this time, the air pressure detected by the air pressure detector 102 is low, so the electrical signal strength output by the air pressure detector 102 to the controller 2 is low. At this time, the current controlled by the controller 2 to enter the electromagnetic push rod 105 is also low, so the electromagnetic push rod 105... When the displacement distance of the push rod 105 pushing the insulating block 106 is too small, the length of the end of the resistance rod away from the electromagnetic push rod 105 connected to the conductive ring 107 and the hoisting drive mechanism 3 in the connection circuit is too long. Therefore, the overall resistance of the connection circuit of the resistance rod, conductive ring 107 and hoisting drive mechanism 3 is too large, resulting in a smaller current intensity flowing into the hoisting drive mechanism 3. At this time, the output power of the hoisting drive mechanism 3 decreases, so the return speed of the auger drill rod 6 slows down. Since the grouting speed is constant, when the return speed of the auger drill rod 6 slows down, As the amount of slurry delivered by the auger rod 6 to the soil layer increases, the slurry pressure also increases. Therefore, in areas of loose soil, the slurry can better fill the gaps in the loose soil. Conversely, in areas of relatively dense soil, the air release rate of the dense soil is slower. At this time, the air delivered by the air pump 96 to the annular air supply gap 92 cannot be discharged in time, so the air pressure detector 102 detects a higher air pressure. Similarly, the current intensity entering the winch drive mechanism 3 increases, which increases the return speed of the auger rod 6, thereby appropriately reducing the pressure in dense soil areas. The amount of grout injected (loose soil layers have larger pores and weaker interparticle connections, requiring more grout to fill the pores in order to achieve the expected density and strength of the soil layer, thereby ensuring the stability and bearing capacity of the foundation. If the amount of grout injected is insufficient, the pores in the loose soil layer cannot be fully filled, which will lead to uneven settlement and other problems in the subsequent use of the foundation. Reducing the amount of grout injected in dense soil areas can prevent excessive grouting pressure, as excessive pressure may cause the dense soil layer to split, damaging the original structure and stability of the soil).

[0043] When the soil is loose, the displacement distance of the electromagnetic push rod 105 pushing the insulating block 106 is relatively short. Therefore, the conductive post 133 will contact the conductive strip 132, so the controller 2 receives the closed connection signal of the conductive post 133 and the conductive strip 132. At this time, the controller 2 will control each heating rod 112 to be energized. After the heating rod 112 is energized, it can heat the slurry entering the heating box 111 (the heating temperature is in the range of 40℃ to 60℃, which can be set according to the composition of the slurry or the temperature when the slurry is pumped out). This can raise the temperature of the slurry filling the loose soil layer. The increased temperature of the slurry intensifies the thermal motion of its internal molecules, thereby increasing the fluidity of the slurry. This allows the slurry to better fill the pores of the loose soil layer, making the contact between the slurry and the loose soil layer more sufficient and stable, and ensuring the bonding strength of the slurry in the loose soil layer.

[0044] After grouting the borehole, the grouting work ends when the auger rod 6 returns to the ground. At this time, the cleaning work can be started by the controller 2. After the cleaning work is started, the controller 2 controls the drive motor 153 to work for 5 seconds at a time. The output end of the drive motor 153 drives the rotating tube 141 on the same side to rotate through the gear transmission assembly 154. The rotating tube 141 can rotate synchronously through each sprocket 151 and chain 152. After the timed work of the drive motor 153 ends, each rotating tube 141 rotates 180°. At the same time, the controller 2 controls each normally open solenoid valve 144 to be energized. At this time, the air pump 96 delivers air into the fixed hollow column 7, which cannot be discharged through the bottom of each vent pipe 8. After each rotating tube 141 rotates 180°, the air jet hole 143 on each rotating tube 141 aligns and connects with the air jet hole 143 on the side sealing rubber sleeve 142 and the side wall of the vent pipe 8 (see reference). Figure 6 At this time, the air pump 96 delivers air through each jet hole 143, which can spray the airflow along the surface of the spiral blade of the auger rod 6, thereby spraying out the soil remaining on the surface of the spiral blade and assisting in cleaning the spiral blade of the auger rod 6.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A railway construction auger injection machine, comprising a frame (1) and a controller (2) mounted on the end face of the frame (1), a winch driving mechanism (3) is mounted on the side wall of the frame (1), a hydraulic driving mechanism (4) is mounted on the movable end of the winch driving mechanism (3), a rotary driving mechanism (5) is mounted on the telescopic end of the hydraulic driving mechanism (4), and an auger rod (6) is arranged below the rotary driving mechanism (5), characterized in that, Also include: Fixed hollow column (7), fixed plug in the rod wall of the auger rod (6) end; A plurality of air pipes (8) are fixedly plugged in the bottom of the fixed hollow column (7), and the lower end of each air pipe (8) penetrates the spiral blade of the auger rod (6) and extends to the upper side of the drill bit of the auger rod (6); Gas supply unit (9) is installed on the outside of the fixed hollow column (7), which is used for supplying gas to the inside of each air pipe (8); The air pressure measuring and control mechanism (10) is arranged on one side of the fixed hollow column (7) and is in communication with the gas supply unit (9), and the air pressure measuring and control mechanism (10) is electrically connected with the winch driving mechanism (3) through the controller (2); The heating unit (11) is arranged above the auger rod (6), and the rotary driving mechanism (5) is drivingly connected with the auger rod (6) through the heating unit (11), the sidewall of the heating unit (11) is provided with a grouting pipe (12), the inside of the air pressure measuring and control mechanism (10) is provided with an opening and closing assembly (13), and the controller (2) controls the working of the heating unit (11) according to the electric signal output by the opening and closing assembly (13); The cleaning unit (14) is installed in each air pipe (8) for regulating the gas outlet direction of each air pipe (8); The gas supply unit (9) includes a hollow sleeve (91) sleeved outside the auger rod (6), and the hollow sleeve (91) is rotatably connected with the outer sidewall of the fixed hollow column (7), an annular gas supply gap (92) is arranged between the hollow sleeve (91) and the outer sidewall of the fixed hollow column (7), and a sealing assembly (93) is arranged between the hollow sleeve (91) and the outer sidewall of the fixed hollow column (7), a plurality of air holes (94) are formed in the inner sidewall of the annular gas supply gap (92), a fixed column (95) is fixedly arranged between the hollow sleeve (91) and the shell sidewall of the rotary driving mechanism (5), and a gas pump (96) is fixedly installed on the shell sidewall of the rotary driving mechanism (5), and the gas outlet end of the gas pump (96) is in communication with the annular gas supply gap (92); The air pressure control mechanism (10) includes a mounting cover (101) fixedly installed on the outer side wall of the hollow sleeve (91), and the side wall of the mounting cover (101) is fixedly inserted with an air pressure detector (102), and the detection end of the air pressure detector (102) is arranged on the inner side of the mounting cover (101), the side wall of the annular air supply gap (92) is provided with a communication hole (103) in communication with the mounting cover (101), the side wall of the casing of the winch driving mechanism (3) is fixedly installed with an insulating hollow plate (104), the inner wall of the insulating hollow plate (104) is fixedly installed with an electromagnetic push rod (105), the controller (2) controls the electromagnetic push rod (105) to work according to the electric signal output by the air pressure detector (102), the telescopic end of the electromagnetic push rod (105) is installed with an insulating block (106), and the side wall of the insulating block (106) is fixedly inserted with a conductive ring (107), the inner wall of the insulating hollow plate (104) on the opposite side of the electromagnetic push rod (105) is fixedly installed with a resistance rod (108), and the inner wall of the conductive ring (107) and the rod wall of the resistance rod (108) are in sliding contact, and the resistance rod (108) and the conductive ring (107) are electrically connected with the winch driving mechanism (3) through the controller (2).

2. A railway construction auger injector as claimed in claim 1 wherein, The heating unit (11) includes a heating box (111) fixedly inserted on the top of the auger (6), the grouting channel of the auger (6) is in communication with the inside of the heating box (111), the grouting pipe (12) is fixedly inserted on the side wall of the heating box (111), a plurality of vertical electric heating rods (112) are fixedly installed in the inside of the heating box (111), the electric heating rods (112) are electrically connected with the controller (2), a transmission rod (113) is fixedly installed on the top of the heating box (111), and the rotary driving mechanism (5) drives the auger (6) to rotate through the transmission rod (113) and the heating box (111).

3. A railway construction auger injector as claimed in claim 2, wherein, The opening and closing assembly (13) includes an elastic support assembly (131) fixedly installed on the inner wall of the insulating hollow plate (104), and the side wall of the elastic support assembly (131) is fixedly installed with a conductive strip (132), the side wall of the insulating block (106) is fixedly installed with a conductive column (133), and one end of the conductive column (133) is in sliding contact with the side wall of the conductive strip (132), when the conductive column (133) is in contact with the conductive strip (132), the controller (2) controls each electric heating rod (112) to work.

4. A railway construction auger injector as defined in claim 1, wherein The cleaning unit (14) comprises a rotating pipe (141) arranged inside each air pipe (8), the inner wall of each air pipe (8) is fixedly provided with a sealing rubber sleeve (142), and the rotating pipe (141) is rotatably arranged inside the sealing rubber sleeve (142), the rotating pipe (141) is provided with a plurality of groups of air injection holes (143) in common with the side wall of the air pipe (8) and the sealing rubber sleeve (142) on the same side, the inside of each air pipe (8) is fixedly provided with a normally open electromagnetic valve (144) below the sealing rubber sleeve (142) on the same side, and the normally open electromagnetic valve (144) is electrically connected with the controller (2), and each rotating pipe (141) is commonly provided with an angle adjusting assembly (15).

5. A railway construction auger injector as claimed in claim 4 wherein, The angle adjusting assembly (15) comprises a sprocket (151) fixedly sleeved on the outer wall of each rotating pipe (141), and each sprocket (151) is commonly connected through a chain (152), the bottom of the fixed hollow column (7) is fixedly provided with a driving motor (153), and the driving motor (153) is arranged on the inner side of the hollow sleeve (91), the output end of the driving motor (153) drives the rotating pipe (141) on the same side to rotate through a gear transmission assembly (154), and the driving motor (153) is electrically connected with the controller (2).

6. A railway construction auger injector as defined in claim 4 wherein, Each group of air injection holes (143) is arranged on the pipe wall of the air pipe (8) away from the spiral drill rod (6) on the same side, and a plurality of air injection holes (143) in the same group are uniformly distributed in a fan shape in a range of 150° on the pipe wall of the air pipe (8) on the same side.

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