Railway construction spiral drilling and injecting machine

Abstract

The invention belongs to the technical field of rotary drilling equipment, and particularly relates to a railway construction spiral drilling and injecting machine which comprises a machine frame and a controller installed on the end face of the machine frame, a winch driving mechanism is installed on the side wall of the machine frame, and a hydraulic driving mechanism is installed at the movable end of the winch driving mechanism. A rotary driving mechanism is installed at the telescopic end of the hydraulic driving mechanism, and a spiral drilling rod is arranged below the rotary driving mechanism. The spiral drill pipe can be assisted in heat dissipation and cooling, continuous and stable drilling of the spiral drill pipe is guaranteed, the drill pipe recovery speed can be automatically adjusted and controlled based on the soil layer loosening degree, slurry injection is uniform, the grouting quality is guaranteed, meanwhile, the loose soil layer grouting temperature can be properly increased, the slurry filling effect is improved, and the grouting efficiency is improved. And residual soil of the spiral drill rod can be cleaned after construction is finished, and follow-up use is prevented from being affected.

Description

Technical Field

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

[0002] In railway construction, the lines often pass through complex geological areas, such as soft soil, sandy soil and other strata. Traditional construction methods are difficult to meet the needs of efficiency and stability. Spiral drilling and injection machines came into being. They can quickly drill holes to the designed depth and accurately inject slurry to 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] At present, the auger drilling machine generally uses an auger rod to drill a hole of a certain depth, and then pumps an appropriate amount of slurry into the hole through the grouting channel reserved inside the drill rod in cooperation with external grouting equipment, so as to achieve the effect of rapid completion of drilling grouting, and is not prone to drilling collapse and other phenomena, and has a good use effect, such as a railway construction auger drilling machine disclosed in patent announcement number CN118273646B;

[0004] During the operation of the spiral drilling and grouting machine, due to the difference in looseness of soil layers at different depths in the drilled holes, when the drill rod return speed and the grouting speed are fixed, many problems will arise. In the looser soil layer, due to its large pores and strong water absorption, the fixed grouting speed may not be able to fully fill the pores, resulting in loose grouting, forming voids or pores, affecting the bearing capacity and stability of the foundation. In the denser soil layer, at the same grouting speed, the slurry may accumulate locally due to difficulty in infiltration, causing waste and affecting the uniformity of slurry distribution, affecting the quality of drilling and grouting, and may not meet the high quality requirements of railway construction. Summary of the invention

[0005] The purpose of the present invention is to provide a railway construction screw drilling machine in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a railway construction spiral drilling machine, comprising a frame and a controller installed on the end surface 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, a rotary drive mechanism is installed on the telescopic end of the hydraulic drive mechanism, an auger rod is arranged below the rotary drive mechanism, and further comprising:

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

[0008] A plurality of ventilation pipes are fixedly inserted at the bottom of the fixed hollow column, and the lower end of each ventilation pipe penetrates the spiral blade of the auger rod and extends to the upper side of the drill head of the auger rod;

[0009] An air supply unit, installed on the outside of the fixed hollow column, for supplying air to the inside of each ventilation pipe;

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

[0011] A heating unit is arranged above the auger rod, and the rotary drive mechanism is connected to the auger rod through the heating unit, a grouting pipe is installed on the side wall of the heating unit, an opening and closing component is arranged inside the air pressure measurement and control mechanism, and a controller controls the operation of the heating unit according to the electrical signal output by the opening and closing component;

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

[0013] Preferably, the air supply unit includes a hollow sleeve which is sleeved on the outside of the spiral 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, a plurality of air vents are provided on the inner side wall of the annular air supply gap, a fixed column is fixedly provided between the hollow sleeve and the side wall of the casing of the rotary drive mechanism, an air pump is fixedly installed on the side wall of the casing of the rotary drive mechanism, and the air outlet end of the air pump is communicated with the annular air supply gap.

[0014] Preferably, the air pressure measurement and control mechanism includes a mounting cover fixedly mounted on the outer wall of the hollow sleeve, and the side wall of the mounting cover is fixedly plugged with an air pressure detector, the detection end of the air pressure detector is arranged on the inner side of the mounting cover, the side wall of the annular air supply gap is provided with a connecting hole connected to the mounting cover, the side wall of the casing of the winch drive mechanism is fixedly mounted with an insulating hollow plate, the inner wall of the insulating hollow plate is fixedly mounted with an electromagnetic push rod, the controller controls the operation of the electromagnetic push rod according to the electrical signal output by the air pressure detector, the telescopic end of the electromagnetic push rod is installed with an insulating block, and the side wall of the insulating block is fixedly plugged with a conductive ring, the inner wall of the insulating hollow plate on the opposite side of the electromagnetic push rod is fixedly mounted with a resistance rod, and the inner wall of the conductive ring is in sliding contact with the rod wall of the resistance rod, and the resistance rod and the conductive ring are electrically connected to the winch drive mechanism through the controller.

[0015] Preferably, the heating unit includes a heating box fixedly inserted on 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 on the side wall of the heating box, a plurality of vertical electric heating rods are fixedly installed inside the heating box, the electric heating rods are electrically connected to the controller, a transmission rod is fixedly installed on the top of the heating box, and the rotary drive mechanism drives the auger rod to rotate through the transmission rod and the heating box.

[0016] Preferably, the opening and closing component includes an elastic support component fixedly mounted on the inner wall of an insulating hollow plate, and a conductive strip is fixedly mounted on the side wall of the elastic support component, a conductive column is fixedly mounted on the side wall of the insulating block, and one end of the conductive column is in sliding contact with the side wall of the conductive strip, and when the conductive column is in contact with the conductive strip, the controller controls each electric heating rod to operate.

[0017] Preferably, the cleaning unit includes a rotating tube arranged inside each ventilation pipe, the inner wall of each ventilation pipe is fixedly mounted with a sealing rubber sleeve, and the rotating tube is rotatably arranged inside the sealing rubber sleeve, the rotating tube and the side walls of the ventilation pipe and the sealing rubber sleeve on the same side are jointly provided with a plurality of groups of jet holes, the interior of each ventilation pipe is fixedly mounted with a normally open solenoid valve at a position below the sealing rubber sleeve on the same side, and the normally open solenoid valve is electrically connected to the controller, and each rotating tube is jointly installed with an angle adjustment component.

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

[0019] Preferably, each group of the jet holes is arranged on the pipe wall of the ventilation pipe on the same side away from the spiral drill rod, and the multiple jet holes in the same group are evenly distributed in a fan shape within a range of 300° on the pipe wall of the ventilation pipe on the same side.

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

[0021] 1. Through the coordination of the frame, controller, winch drive mechanism, hydraulic drive mechanism, rotary drive mechanism, auger rod, fixed hollow column, ventilation pipe and air supply unit, the auger rod can be assisted in heat dissipation and cooling during the drilling process, which is beneficial for the continuous and stable drilling work of the auger rod. In combination with the air pressure measurement and control mechanism, the recovery speed of the auger rod can be automatically adjusted based on the looseness of the soil layer during grouting, thereby increasing the injection amount of slurry at the position of the loose soil layer, so that the slurry can fully fill the loose soil layer, and reducing the injection amount of slurry at the dense soil layer, so that the overall slurry injection is kept uniform and the grouting quality is ensured.

[0022] 2. By setting up the heating unit, the temperature of the injected slurry can be appropriately increased when grouting the loose soil layer, so that the slurry can flow more easily to fill the loose gaps, thereby further assisting in improving the adequacy of grouting the loose soil layer.

[0023] 3. The cleaning unit can assist in cleaning the soil remaining on the surface of the spiral blade of the auger rod after the drilling and grouting is completed, so as to avoid the soil drying and solidifying on the surface of the spiral blade and affecting the subsequent use, and the cleaning is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0028] Figure 5 The invention provides a railway construction spiral drilling machine. Figure 3 A magnified view of the structure of part A;

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

[0030] Figure 7 The invention provides a railway construction spiral drilling machine. Figure 2 A magnified view of the structure of part B;

[0031] Figure 8 The present invention is a schematic diagram of a top view of the connection structure of each rotating tube of a railway construction spiral drilling and injection machine.

[0032] In the figure: 1 frame, 2 controller, 3 winch drive mechanism, 4 hydraulic drive mechanism, 5 rotation drive mechanism, 6 auger rod, 7 fixed hollow column, 8 ventilation pipe, 9 air supply unit, 91 hollow sleeve, 92 annular air supply gap, 93 sealing assembly, 94 ventilation hole, 95 fixed column, 96 air pump, 10 air pressure measurement and control mechanism, 101 installation 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 electric 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 rotating 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 DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figure 1-Figure 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, and 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 steel strand to wind up the winding roller, the hydraulic drive mechanism 4 mainly includes a hydraulic cylinder, a mounting seat 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, and also includes: a fixed hollow column 7, the fixed hollow column 7 is fixedly plugged into the upper end of the rod wall of the spiral drill rod 6, a plurality of ventilation pipes 8, all of which are fixedly plugged into the bottom of the fixed hollow column 7, and the lower end of each ventilation pipe 8 passes through the spiral leaf of the spiral drill rod 6 and extends To the upper side of the drill head of the auger rod 6, the air supply unit 9 is installed on the outer side of the fixed hollow column 7, and is used to supply air to the inside of each ventilation pipe 8. The air supply unit 9 includes a hollow sleeve 91 sleeved on the outer side of the auger rod 6, and the hollow sleeve 91 is rotatably connected to the outer wall of the fixed hollow column 7, and 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 component 93 is provided between the hollow sleeve 91 and the outer wall of the fixed hollow column 7, and the inner wall of the annular air supply gap 92 is provided with a There are multiple air holes 94, a fixed column 95 is fixedly provided between the hollow sleeve 91 and the side wall of the casing of the rotating drive mechanism 5, an air pump 96 is fixedly installed on the side wall of the casing of the rotating drive mechanism 5, and the air outlet end of the air pump 96 is connected to the annular air supply gap 92, the sealing component 93 includes components such as an annular sealing plate and a sealing rubber ring, the hollow sleeve 91 is rotatably connected to the fixed hollow column 7 through a sealing bearing, and the sealing component 93 can prevent the airflow from being discharged from between the hollow sleeve 91 and the side wall of the fixed hollow column 7.

[0035] The air pressure measurement and control mechanism 10 is arranged on one side of the fixed hollow column 7 and is connected to the air supply unit 9. The air pressure measurement and control mechanism 10 is electrically connected to the hoisting drive mechanism 3 through the controller 2. The air pressure measurement and control mechanism 10 includes a mounting cover 101 fixedly mounted on the outer wall of the hollow sleeve 91, and the side wall of the mounting cover 101 is fixedly plugged with an air pressure detector 102. 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 connecting hole 103 connected to the mounting cover 101. The side wall of the casing of the hoisting drive mechanism 3 is fixedly mounted with an insulating hollow plate 104. The inner wall of the insulating hollow plate 104 An electromagnetic push rod 105 is fixedly installed, and 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 resistance 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 is in sliding contact with the rod wall of the resistance rod 108. The resistance rod 108 and the conductive ring 107 are electrically connected to the winch drive mechanism 3 through the controller 2, and the air pressure detector 102 can convert the air pressure into an electrical signal and output it to the controller 2.

[0036] The heating unit 11 is arranged above the auger rod 6, and the rotary drive mechanism 5 is transmission-connected to the auger rod 6 through the heating unit 11. A grouting pipe 12 is installed on the side wall of the heating unit 11. An opening and closing component 13 is arranged inside the air pressure measurement and 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 component 13. The heating unit 11 includes a heating box 111 fixedly plugged into the top of the auger rod 6, the grouting channel of the auger rod 6 is connected to the interior of the heating box 111, the grouting pipe 12 is fixedly plugged into the side wall of the heating box 111, and a plurality of vertical electric heating rods 112 are fixedly installed inside the heating box 111, and 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 through the transmission rod 113 and the heating box 111, and the heating temperature of the electric heating rod 112 is in the range of 40°C to 60°C.

[0037] The opening and closing component 13 includes an elastic support component 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 component 131, and a conductive column 133 is fixedly installed on the side wall of the insulating block 106, 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. The elastic support component 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 arranged between the insulating movable plate and the insulating fixed plate, and the conductive column 133 is installed on the side wall of the insulating movable plate.

[0038] The cleaning unit 14 is installed inside each ventilation pipe 8 and is used to adjust the air outlet direction of each ventilation pipe 8. The cleaning unit 14 includes a rotating tube 141 arranged inside each ventilation pipe 8. A sealing rubber sleeve 142 is fixedly installed on the inner wall of each ventilation pipe 8, and the rotating tube 141 is rotatably arranged inside the sealing rubber sleeve 142. The rotating tube 141 and the side walls of the ventilation pipe 8 and the sealing rubber sleeve 142 on the same side are jointly provided with a plurality of groups of air injection holes 143. The interior of each ventilation pipe 8 is located at the sealing rubber sleeve 142 on the same side. A normally open solenoid valve 144 is fixedly installed at the position below the rubber sleeve 142, and the normally open solenoid valve 144 is electrically connected to the controller 2. Each rotating tube 141 is commonly equipped with an angle adjustment component 15. Each group of jet holes 143 is arranged on the pipe wall of the ventilation pipe 8 on the same side away from the spiral drill rod 6. The multiple jet holes 143 in the same group are evenly distributed in a fan shape within a 150° range of the pipe wall of the ventilation pipe 8 on the same side. The sealing rubber sleeve 142 can prevent the airflow from flowing through the gap between the rotating tube 141 and the ventilation pipe 8.

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

[0040] The operating principle of the present invention is now described as follows: when drilling, the rotary drive mechanism 5 drives the auger rod 6 to rotate through the transmission rod 113 and the heating box 111, and the hydraulic drive mechanism 4 drives the auger rod 6 to move downward, so that drilling construction can be carried out. After the hydraulic drive mechanism 4 drives the auger rod 6 to move downward for a certain distance (the 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 for a certain distance, and then the hydraulic drive mechanism 4 continues to drive the auger rod 6 to move downward. By alternating work, a hole of a predetermined depth can be drilled. During the drilling process, the heat dissipation work is started by the controller 2. At this time, the controller 2 will control the air pump 96 to work. The air pump 96 sucks in the external airflow and transports it to the annular air supply gap 92, and 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 auger rod 6 can be assisted in heat dissipation and cooling, so that the auger rod 6 can be continuously and stably drilled.

[0041] After the drilling is completed, the discharge end of the external slurry pumping equipment is connected to the grouting pipe 12 through a hose, and then the grouting work is started through the controller 2. After the grouting work is started, the controller 2 will control the hoisting mechanism to pull the auger rod 6 back through the hydraulic drive mechanism 4, the transmission rod 113 and the heating box 111, and the external slurry pumping equipment will synchronously supply the slurry. The slurry enters the heating box 111 through the grouting pipe 12 and is transported to the hole through the grouting channel of the auger rod 6. The slurry will fill the hole, and the auger rod 6 will synchronously move back under the action of the hoisting drive mechanism 3;

[0042] During the return movement of the auger rod 6, the controller 2 controls the air pump 96 to continue working. When the lower end of each ventilation pipe 8 moves to a position where the soil layer is relatively loose, the soil layer is loose and the soil pores are larger, so the air flow is easier to flow out. Therefore, the air flow delivered to the annular air supply gap 92 by the air pump 96 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 pass into the electromagnetic push rod 105 is also small, so the electromagnetic The displacement distance of the push rod 105 pushing the insulating block 106 is relatively small. At this time, the length of the connection loop between the end of the resistor rod away from the electromagnetic push rod 105 and the conductive ring 107 and the hoisting drive mechanism 3 is relatively long. Therefore, at this time, the overall resistance of the connection loop between the resistor rod, the conductive ring 107 and the hoisting drive mechanism 3 is relatively large, so that the current intensity passing into the hoisting drive mechanism 3 becomes smaller. At this time, the output power of the hoisting drive mechanism 3 is reduced, so the return speed of the auger rod 6 is slowed down. Since the grouting speed is constant, when the return speed of the auger rod 6 slows down , the amount of slurry delivered by the auger rod 6 to the soil layer increases, and the slurry pressure increases. Therefore, at the loose position of the soil layer, the slurry can better fill the gaps in the loose soil layer. On the contrary, at the relatively dense position of the soil layer, the exhaust speed of the dense soil slows down. At this time, the air delivered to the annular air supply gap 92 by the air pump 96 cannot be discharged in time, so the air pressure detected by the air pressure detector 102 becomes higher. Similarly, the current intensity passed into the winch drive mechanism 3 becomes larger, which increases the return speed of the auger rod 6, thereby appropriately reducing the pressure at the dense position of the soil layer. The amount of grouting (the loose soil layer has larger pores and weaker connections between particles, so more slurry is needed to fill the pores to make the soil layer reach the expected density and strength, thereby ensuring the stability and bearing capacity of the foundation. If the grouting amount is insufficient, the pores in the loose soil layer cannot be fully filled, which will cause problems such as uneven settlement of the foundation during subsequent use. Reducing the grouting amount at the dense soil position can prevent the grouting pressure from being too high, because excessive pressure may cause the dense soil layer to split and destroy the original structure and stability of the soil);

[0043] Among them, when the looseness of the soil is relatively large, since the displacement distance of the electromagnetic push rod 105 pushing the insulating block 106 is relatively short, the conductive column 133 will contact the conductive strip 132 at this time, so that the controller 2 receives the connection loop closing electrical signal between the conductive column 133 and the conductive strip 132. At this time, the controller 2 will control each electric heating rod 112 to be energized. After the electric heating rod 112 is energized, the slurry entering the heating box 111 can be heated (the heating temperature is in the range of 40°C to 60°C, which can be set according to the composition of the slurry or the temperature when the slurry is pumped out), so that the temperature of the slurry filled in the loose soil layer can be increased. The thermal motion of the internal molecules of the slurry with increased temperature is intensified, thereby increasing the fluidity of the slurry, and then the slurry can be better filled into each pore of the loose soil layer, so that the contact between the slurry and the loose soil layer is more sufficient and stable, ensuring the bonding strength of the slurry in the loose soil layer;

[0044] With the grouting of the hole, when the auger rod 6 moves back to the ground, the grouting work is completed. At this time, the cleaning work can be started by the controller 2. After the cleaning work is started, the controller 2 controls the driving motor 153 to perform a timed work of 5 seconds. The output end of the driving motor 153 drives the rotating tube 141 on the same side to rotate through the gear transmission assembly 154. The rotating tube 141 can make each rotating tube 141 rotate synchronously through each sprocket 151 and chain 152. After the timing work of the driving motor 153 is completed, 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 delivered to the inside of the fixed hollow column 7 by the air pump 96 cannot be discharged through the bottom of each ventilation pipe 8. After each rotating tube 141 rotates 180°, the jet hole 143 on each rotating tube 141 is aligned and connected with the jet hole 143 on the side wall of the sealing rubber sleeve 142 on the same side and the ventilation pipe 8 (refer to Figure 6 ), at this time, the air delivered by the air pump 96 is ejected through each jet hole 143, so that the airflow can be ejected along the surface of the spiral blades of the auger rod 6, and then the soil remaining on the surface of the spiral blades can be ejected, thereby assisting in cleaning the spiral blades 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A railway construction screw drilling machine, comprising a frame (1) and a controller (2) mounted on the end surface of the frame (1), a winch drive mechanism (3) being mounted on the side wall of the frame (1), a hydraulic drive mechanism (4) being mounted on the movable end of the winch drive mechanism (3), a rotary drive mechanism (5) being mounted on the telescopic end of the hydraulic drive mechanism (4), a screw drill rod (6) being arranged below the rotary drive mechanism (5), characterized in that: Also includes: A fixed hollow column (7) is fixedly inserted into the upper end of the rod wall of the spiral drill rod (6); A plurality of ventilation pipes (8) are fixedly inserted at the bottom of the fixed hollow column (7), and the lower end of each ventilation pipe (8) penetrates the spiral blade of the spiral drill rod (6) and extends to the upper side of the drill head of the spiral drill rod (6); An air supply unit (9) is installed on the outside of the fixed hollow column (7) and is used to supply air to the inside of each ventilation pipe (8); An air pressure measurement and control mechanism (10) is arranged on one side of the fixed hollow column (7) and is connected to the air supply unit (9); the air pressure measurement and control mechanism (10) is electrically connected to the hoisting drive mechanism (3) via a controller (2); A heating unit (11) is arranged above the auger rod (6), and the rotary drive mechanism (5) is connected to the auger rod (6) through the heating unit (11). A grouting pipe (12) is installed on the side wall of the heating unit (11). An opening and closing component (13) is arranged inside the air pressure measurement and control mechanism (10), and the controller (2) controls the operation of the heating unit (11) according to an electrical signal output by the opening and closing component (13); The cleaning unit (14) is installed inside each of the ventilation pipes (8) and is used to adjust the air outlet direction of each of the ventilation pipes (8).

2. A railway construction auger drilling machine according to claim 1, characterized in that: The air supply unit (9) comprises a hollow sleeve (91) sleeved on the outside of the spiral drill 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 component (93) is provided between the hollow sleeve (91) and the outer wall of the fixed hollow column (7), a plurality of air vents (94) are provided on the inner wall of the annular air supply gap (92), a fixed column (95) is fixedly provided between the hollow sleeve (91) and the side wall of the casing of the rotary drive mechanism (5), an air pump (96) is fixedly installed on the side wall of the casing of the rotary drive mechanism (5), and the air outlet end of the air pump (96) is connected to the annular air supply gap (92).

3. A railway construction auger drilling machine according to claim 2, characterized in that: The air pressure measurement and control mechanism (10) comprises a mounting cover (101) fixedly mounted on the outer wall of the hollow sleeve (91), and a pressure detector (102) is fixedly plugged into the side wall of the mounting cover (101), a detection end of the pressure detector (102) is arranged on the inner side of the mounting cover (101), a connecting hole (103) connected to the mounting cover (101) is opened on the side wall of the annular air supply gap (92), an insulating hollow plate (104) is fixedly mounted on the side wall of the casing of the hoisting drive mechanism (3), an electromagnetic push rod (105) is fixedly mounted on the inner wall of the insulating hollow plate (104), and the control The device (2) controls the electromagnetic push rod (105) to work according to the electrical 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 plugged with a conductive ring (107); the inner wall of the insulating hollow plate (104) located 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) is in sliding contact with the rod wall of the resistance rod (108); the resistance rod (108) and the conductive ring (107) are electrically connected to the hoisting drive mechanism (3) through the controller (2).

4. A railway construction auger drilling machine according to claim 3, characterized in that: The heating unit (11) comprises a heating box (111) fixedly plugged into the top of the auger rod (6); the grouting channel of the auger rod (6) is connected to the interior of the heating box (111); the grouting pipe (12) is fixedly plugged into the side wall of the heating box (111); a plurality of 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).

5. The railway construction auger drilling machine according to claim 4, characterized in that: The opening and closing component (13) comprises an elastic support component (131) fixedly mounted on the inner wall of the insulating hollow plate (104), and a conductive strip (132) is fixedly mounted on the side wall of the elastic support component (131), and a conductive column (133) is fixedly mounted on the side wall of the insulating block (106), and one end of the conductive column (133) is in sliding contact with the side wall of the conductive strip (132), and when the conductive column (133) is in contact with the conductive strip (132), the controller (2) controls each electric heating rod (112) to operate.

6. The railway construction auger drilling machine according to claim 2, characterized in that: The cleaning unit (14) comprises a rotating tube (141) arranged inside each ventilation tube (8), a sealing rubber sleeve (142) is fixedly installed on the inner wall of each ventilation tube (8), and the rotating tube (141) is rotatably arranged inside the sealing rubber sleeve (142), and the rotating tube (141) and the side wall of the ventilation tube (8) and the sealing rubber sleeve (142) on the same side are jointly provided with a plurality of groups of jet holes (143), and a normally open solenoid valve (144) is fixedly installed at a position below the sealing rubber sleeve (142) on the same side inside each ventilation tube (8), and the normally open solenoid valve (144) is electrically connected to the controller (2), and each rotating tube (141) is jointly installed with an angle adjustment component (15).

7. A railway construction auger drilling machine according to claim 6, characterized in that: The angle adjustment assembly (15) comprises a sprocket (151) fixedly sleeved on the upper side of the outer tube wall of each rotating tube (141), and each sprocket (151) is connected to each other through a chain (152). A driving motor (153) is fixedly installed at the bottom of the fixed hollow column (7), 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 tube (141) on the same side to rotate through a gear transmission assembly (154), and the driving motor (153) is electrically connected to the controller (2).

8. The railway construction auger drilling machine according to claim 6, characterized in that: Each group of the jet holes (143) is arranged on the tube wall of the ventilation pipe (8) on the same side away from the spiral drill rod (6), and the plurality of jet holes (143) in the same group are evenly distributed in a fan shape within a range of 150 degrees on the tube wall of the ventilation pipe (8) on the same side.

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