Self-protection type municipal road and bridge drilling and punching equipment

Abstract

The invention relates to the technical field of drilling machines of land transportation devices, in particular to self-protection type municipal road and bridge drilling and punching equipment which comprises a drill bit, a plurality of elastic supporting assemblies are arranged on the drill bit in the circumferential direction around the circle center of the drill bit, and stirring air suspending assemblies for stirring drilling cuttings are arranged on the elastic supporting assemblies. The elastic supporting assembly is an elastic telescopic rod, the stirring and air suspending assembly comprises a mounting cylinder fixedly arranged on the elastic supporting assembly, a plurality of stirring plates are arranged in the mounting cylinder in the circumferential direction around the circle center of the mounting cylinder, the stirring plates are obliquely arranged, and an air suspending plate is arranged between every two adjacent stirring plates and located above the supporting plates; the inclination direction of the suspended plate is the same as that of the supporting plate, one end of the suspended plate is connected with the top end of one stirring plate, and the other end of the suspended plate is arranged on the inclined surface of the other adjacent stirring plate.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling rigs for land transportation devices, and more specifically, to a self-protecting municipal road and bridge drilling and punching device. Background Art

[0002] During the construction of roads and bridges, drilling equipment is often used to penetrate soil layers or rock layers to meet the requirements of subsequent projects. Such equipment usually uses an energy-saving hydraulic system to drive the drill bit for operation. However, during the drilling process, in order to prevent the drill bit from overheating, it is necessary to inject water for cooling, which results in the accumulation of a mixture composed of drill chips and cooling water in the drill hole, hindering work efficiency. The current solution is to clean these sediments after the drill bit is withdrawn, but this undoubtedly reduces the overall construction efficiency. Another improvement method is to use a device that drains water while drilling, but this method has a problem: since the drain outlet is set at the bottom of the hole, larger drill chips are likely to accumulate above, hindering the effective settlement of drill chips and sewage, thus affecting the discharge effect of fine drill chips and sewage at the bottom, and ultimately making the cleaning work complicated and inefficient.

[0003] Based on this, the present invention discloses a self-protecting municipal road and bridge drilling and punching device. Summary of the Invention

[0004] To solve the problem that in the construction of roads and bridges by the drilling equipment in the background art, when the drill bit is cooled by injecting water, it will cause the accumulation of a mixture of large drill chips and sewage in the hole, affecting efficiency. The method of draining water while drilling has the problem that larger drill chips block the upper part and hinder the settlement of waste materials, resulting in the difficulty of effectively discharging fine drill chips and sewage at the bottom. The present invention provides a self-protecting municipal road and bridge drilling and punching device, which includes a land transportation device, an energy-saving hydraulic lifting device is arranged on the land transportation device, a drill pipe is arranged at the output end of the energy-saving hydraulic lifting device, a drill bit is arranged at the output end of the drill pipe, a plurality of elastic support components are arranged around the center of the drill bit in a circumferential direction, and a stirring and suspending component for stirring drill chips is arranged on the elastic support component; In this technical solution, in order to enable the drainage to proceed smoothly and prevent the aggregation of large-particle drill chips above from causing the mixture to be unable to be discharged; As a further improvement of this technical solution, the elastic support component is an elastic telescopic rod, and the stirring and suspending component includes an installation cylinder fixed on the elastic support component. A plurality of stirring plates are arranged around the center of the installation cylinder in a circumferential direction. The stirring plates are inclined, and a plurality of support plates are arranged from bottom to top between two adjacent stirring plates. The support plates are arranged in an inclined direction opposite to that of the stirring plates. A plurality of diversion grooves are arranged along the inclined direction on the inclined surface where the stirring plates contact the support plates, and a plurality of stirring rods are uniformly arranged perpendicular to the ground direction at the top of the stirring plates; As a further improvement of the technical solution, a suspension plate is arranged above a plurality of support plates between two adjacent stirring plates. The inclination direction of the suspension plate is the same as that of the support plate. One end of the suspension plate is connected to the top end of the upper stirring plate, and the other end of the suspension plate is arranged on the inclined surface of the adjacent other stirring plate.

[0005] The swirling disturbance is formed through the diversion groove of the stirring plate by the stirring suspension assembly. The gradient inclination design of the suspension plate and the support plate (angle: stirring plate < suspension plate < support plate) prolongs the residence time of particles and creates a slag discharge space; it realizes cracking the filter bed effect, dynamically stirs to prevent large particles from accumulating on the surface of the second filter screen, eliminates the particle size stratification and siltation caused by the blockage of coarse particles in the traditional process, and the diversion groove and the stirring rod cooperate to form swirling scouring to avoid filter screen blockage; In addition, when the stirring plate is affected by the resistance of large particles, the telescopic rod compresses the telescopic spring through the chute / slider and automatically lifts to avoid.

[0006] On this basis, when the large particles above are stirred to form a certain suspension effect, the mixture can enter the pumping assembly and be pumped away. As a further improvement of the technical solution, a pumping assembly is sleeved outside the drill rod. The pumping assembly includes a fixed sleeve. The bottom end of the fixed sleeve is rotatably connected to the drill bit. The top end of the fixed sleeve is arranged adjacent to the bottom of the energy-saving hydraulic lifting device. A drain pipe is communicated with the top end of the fixed sleeve. A screw conveyor is rotatably arranged in the fixed sleeve. The screw conveyor is fixedly sleeved outside the drill rod. A plurality of water inlets are circumferentially arranged at the bottom end of the fixed sleeve. A first filter screen is arranged on the water inlets; Limiting grooves are symmetrically arranged on both sides of the fixed sleeve. A limiting component is arranged on the land transportation device in the direction directly opposite to the drill bit.

[0007] As a further improvement of the technical solution, the limiting component includes a mounting plate fixedly connected to the land transportation device. An access hole adapted to the drill bit is opened on the mounting plate. A limiting rod corresponding to the position of the limiting groove is rotatably arranged on the mounting plate.

[0008] As a further improvement of the technical solution, in the initial state, the limiting rod is in a vertical state; in the working state, the limiting rod is in a horizontal state, and the limiting rod is slidably connected in the limiting groove.

[0009] As a further improvement of the technical solution, a gathering component for gathering smaller drill cuttings mixture is arranged at the bottom end of the fixed sleeve. The gathering component includes a water accumulation cover. The bottom end of the water accumulation cover is rotatably connected to the drill bit. A second filter screen is fixedly arranged at the top end of the water accumulation cover. The second filter screen is fixedly sleeved outside the fixed sleeve. The inner diameter of the water accumulation cover is larger than the inner diameter of the fixed sleeve. The outer diameter of the water accumulation cover is smaller than the outer diameter of the drill bit. The height of the water accumulation cover is higher than the height of the water inlet.

[0010] After the limiting rod is inserted into the limiting groove, the fixed sleeve can only move vertically, while the auger rotates with the drill pipe, forming an independent movement mode to achieve continuous slag discharge. The auger conveys the filtered sewage and fine drill cuttings from the water inlet to the drain pipe in real time through spiral transportation, realizing synchronous drilling and slag discharge, eliminating the process interruption of traditional secondary slag cleaning, and increasing the construction efficiency by more than 40%; achieving anti-offset and hole stabilization. The vertical limit of the fixed sleeve restricts the swing of the drill pipe, and the verticality deviation of the formed hole is controlled within ±2 cm, reducing the risk of hole wall collapse.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this self-protective municipal road and bridge drilling and punching device, the collaborative work of the stirring suspension component and the elastic support component can dynamically clean the large particle drill cuttings accumulated on the surface of the second filter screen during the drilling process. The design of the elastic telescopic rod enables the stirring plate to automatically lift when encountering obstacles, avoiding the occurrence of jamming. This mechanism not only keeps the filter screen unobstructed but also provides sufficient falling space for fine drill cuttings and sewage, further improving the waste extraction efficiency.

[0012] 2. In this self-protective municipal road and bridge drilling and punching device, the self-adaptability of the elastic support component enables it to automatically adjust its position when encountering hard objects, avoiding damage to the equipment or causing operation interruption. This design ensures the reliability and durability of the equipment under complex geological conditions and also reduces the maintenance cost.

[0013] 3. In this self-protective municipal road and bridge drilling and punching device, by setting the pumping and limiting components, continuous discharge of drill cuttings and sewage during the drilling process is achieved. The auger in the fixed sleeve, driven by the rotation of the drill pipe, can efficiently extract and discharge the mixture of drill cuttings and sewage filtered through the filter screen from the hole. Brief Description of the Drawings

[0014] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the limiting component of the present invention; Figure 3 is the structural schematic diagram of the drill bit of the present invention; Figure 4 is the structural schematic diagram of the pumping component of the present invention; Figure 5 is the structural sectional view of the gathering component of the present invention; Figure 6 is the structural sectional view of the pumping component of the present invention; Figure 7 is Figure 6 the enlarged structural view of part A in Figure 8 Schematic structural diagram of the stirring and hovering assembly of the present invention; Figure 9 Cross-sectional structural view of the elastic support assembly of the present invention; Figure 10 is Figure 9 Enlarged structural view of part B in Figure 11 Schematic structural diagram of the stirring plate of the present invention Figure 12 is Figure 11 Enlarged structural view of part C in

[0015] The meanings of the various labels in the figure are as follows: 1, land transportation device; 2, energy-saving hydraulic lifting device; 3, drill pipe; 4, drill bit; 5, limit assembly; 6, pumping assembly; 7, gathering assembly; 8, elastic support assembly; 9, stirring and hovering assembly; 51, mounting plate; 52, access hole; 53, limit rod; 61, fixed sleeve; 62, auger; 63, water inlet; 64, first filter screen; 65, limit groove; 71, water accumulation cover; 72, second filter screen; 81, fixed rod; 82, telescopic rod; 83, chute; 84, slider; 85, telescopic spring; 91, mounting cylinder; 92, stirring plate; 93, hovering plate; 94, support plate; 95, diversion groove; 96, stirring rod. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] In the existing drilling equipment during road and bridge construction, when cooling the drill bit 4 by injecting water, it will cause the accumulation of large drill cuttings and sewage mixture in the hole, affecting the efficiency; the method of drilling while draining water has the problem that larger drill cuttings block the upper part and hinder the settlement of waste materials, resulting in difficulty in effectively discharging the fine drill cuttings and sewage at the bottom.

[0018] For this reason, the present invention provides a self-protective municipal road and bridge drilling and punching equipment. Refer to Figure 1 As shown, it includes a land transportation device 1, an energy-saving hydraulic lifting device 2 is arranged on the land transportation device 1, a drill pipe 3 is arranged at the output end of the energy-saving hydraulic lifting device 2, and a drill bit 4 is arranged at the output end of the drill pipe 3.

[0019] Specifically, referring to Figures 2 - 7 As shown, a pumping assembly 6 is sleeved outside the drill pipe 3. The pumping assembly 6 includes a fixed sleeve 61. The bottom end of the fixed sleeve 61 is rotatably connected to the drill bit 4. The top end of the fixed sleeve 61 is arranged adjacent to the bottom of the energy-saving hydraulic lifting device 2. And a drain pipe is communicated with the top end of the fixed sleeve 61. A auger 62 is rotatably arranged in the fixed sleeve 61. The auger 62 is fixedly sleeved outside the drill pipe 3. A plurality of water inlets 63 are circumferentially arranged at the bottom end of the fixed sleeve 61. A first filter screen 64 is arranged on the water inlets 63. Limiting grooves 65 are symmetrically arranged on both sides of the fixed sleeve 61. A limiting assembly 5 is arranged on the land transportation device 1 in the direction directly opposite to the drill bit 4.

[0020] Among them, as Figure 2 shown, the limiting assembly 5 includes a mounting plate 51 fixedly connected to the land transportation device 1. An access hole 52 adapted to the drill bit 4 is formed on the mounting plate 51. A limiting rod 53 corresponding to the position of the limiting groove 65 is rotatably arranged on the mounting plate 51. Secondly, in the initial state, the limiting rod 53 is in a vertical state. In the working state, the limiting rod 53 is in a horizontal state, and the limiting rod 53 is slidably connected in the limiting groove 65.

[0021] When the device is working, after moving to a designated position through the land transportation device 1, the drill pipe 3 and the drill bit 4 are lowered by means of the energy-saving hydraulic lifting device 2. During the lowering process, the pumping assembly 6 sleeved outside the drill pipe 3 will also be driven to lower. At this stage, first, the drill bit 4 will pass through the mounting plate 51, and then the fixed sleeve 61 will pass through the mounting plate 51. After the limiting groove 65 on the fixed sleeve 61 enters the mounting plate 51, the limiting rod 53 can be rotated, causing the limiting rod 53 to be stuck in the limiting groove 65. In this way, when the fixed sleeve 61 continues to be lowered, the limiting rod 53 will slide in the limiting groove 65. The two limiting rods 53 on both sides act simultaneously to limit the overall rotation of the fixed sleeve 61, so that the fixed sleeve 61 can only move in the vertical direction along with the drill pipe 3, while the auger 62 in the fixed sleeve 61 rotates along with the drill pipe 3. Specifically, after the drill bit 4 drills to generate drill chips and sewage, it enters the fixed sleeve 61 after being filtered by the first filter screen 64. The auger 62 rotates driven by the drill pipe 3 to carry out the sewage and drill chips entering the fixed sleeve 61, and discharges them through the drain pipe after being brought to the top.

[0022] Furthermore, referring to Figures 2 - 5As shown in the figure, in order to make it easier to gather and extract the mixture of drill cuttings and sewage in the fixed sleeve 61, while preventing larger particles of drill cuttings from entering the fixed sleeve 61 and causing the auger 62 to jam during rotation, a gathering component 7 for gathering smaller drill cutting mixtures is provided at the bottom end of the fixed sleeve 61. The gathering component 7 includes a water accumulation cover 71. The bottom end of the water accumulation cover 71 is rotatably connected to the drill bit 4. A second filter screen 72 is fixedly provided at the top end of the water accumulation cover 71. The second filter screen 72 is fixedly sleeved outside the fixed sleeve 61 to filter out larger particles of drill cuttings. The second filter screen 72 serves as the first-stage filtration. After filtration, the mixture of drill cuttings and sewage enters the water accumulation cover 71 to form a stable water source, and then enters the fixed sleeve 61 through the second-stage filtration of the first filter screen 64. In this way, a continuous stream of water will enter the fixed sleeve 61 and then be extracted by means of the auger 62.

[0023] When the device is working, since the fixed sleeve 61 does not rotate, the water accumulation cover 71 and the second filter screen 72 are fixedly provided on the fixed sleeve 61. Therefore, the entire gathering component 7 does not move and plays a role in water gathering. In addition, the inner diameter of the water accumulation cover 71 is larger than the inner diameter of the fixed sleeve 61, the outer diameter of the water accumulation cover 71 is smaller than the outer diameter of the drill bit 4, and the height of the water accumulation cover 71 is higher than the height of the water inlet 63.

[0024] Furthermore, as shown in Figure 3 and Figures 8 - 10 the figure, in order to further facilitate the stable and continuous entry of sewage and drill cuttings into the fixed sleeve 61, after a period of time, larger particles of drill cuttings will accumulate on the second filter screen 72. It should be noted that the filtration density of the second filter screen 72 is similar to that of the first filter screen 64. Therefore, no particles will accumulate in the water accumulation cover 71, and the mixture entering the water accumulation cover 71 can be smoothly extracted by the auger 62. Therefore, it is necessary to continuously process the relatively large drill cuttings accumulated on the surface of the second filter screen 72 to a certain thickness to prevent the mixture of drill cuttings and sewage in the borehole from not being able to fall into the water accumulation cover 71 after accumulating to a certain thickness, which will further lead to the inability to extract the drill cuttings and sewage through the auger 62. Therefore, a number of elastic support components 8 are circumferentially arranged around the center of the drill bit 4, and a stirring and hovering component 9 for stirring drill cuttings is provided on the elastic support components 8. Among them, the elastic support component 8 is an elastic telescopic member. The elastic support component 8 includes a fixed rod 81 fixedly connected to the bottom end of the drill bit 4. An expansion rod 82 is arranged inside the top end of the fixed rod 81. Sliding grooves 83 are symmetrically formed on both sides inside the fixed rod 81. A slider 84 is slidably connected inside the sliding groove 83. The expansion rod 82 is slidably connected inside the fixed rod 81 through the slider 84. A telescopic spring 85 is arranged at the bottom of the expansion rod 82 inside the fixed rod 81. The expansion rod 82 elastically expands and contracts inside the fixed rod 81 through the telescopic spring 85. Thus, when the elastic support component 8 drives the stirring and hovering component 9 to rotate and stir the larger particles of drill cuttings on the surface of the second filter screen 72, if jamming occurs, the entire stirring and hovering component 9 will be lifted by the expansion rod 82 to pass over the stone.

[0025] Secondly, as Figures 11 - 12 shown, the stirring and hovering component 9 includes an installation cylinder 91 fixedly arranged on the expansion rod 82. A plurality of stirring plates 92 are circumferentially arranged around the center of the installation cylinder 91. The stirring plates 92 are inclined. A plurality of support plates 94 are arranged from bottom to top between two adjacent stirring plates 92. The support plates 94 are arranged in an inclined direction opposite to that of the stirring plates 92. A plurality of diversion grooves 95 are formed on the inclined surfaces where the stirring plates 92 and the support plates 94 contact along their inclined directions. A plurality of stirring rods 96 are uniformly arranged perpendicular to the ground direction on the top ends of the stirring plates 92. A hovering plate 93 is arranged above the plurality of support plates 94 between two adjacent stirring plates 92. The inclined direction of the hovering plate 93 is the same as that of the support plate 94. One end of the hovering plate 93 is connected to the top end of one stirring plate 92. The other end of the hovering plate 93 is arranged on the inclined surface of the adjacent other stirring plate 92. And the top end of the expansion rod 82 is fixedly connected to one side of the installation cylinder 91. In the initial state, the position of the expansion rod 82 is such that the bottom end of the stirring plate 92 always has a tendency to fit the surface of the second filter screen 72 through the telescopic spring 85.

[0026] In addition, the inclination angle of the stirring plate 92 is smaller than that of the air suspension plate 93, and the inclination angle of the air suspension plate 93 is smaller than that of the support plate 94. Moreover, the side of the stirring plate 92 away from the mounting cylinder 91 is in contact with the outside of the fixed sleeve 61. In this way, the smaller the inclination angle of the air suspension plate 93, the higher the slope of its inclined surface. Combining with the stirring of the particles by the stirring rod 96 and the top of the mounting cylinder 91, the residence time of the particles in the air will increase, providing a falling space for the smaller drill cuttings and sewage above the particles. Secondly, the slope of the support plate 94 at the bottom of the air suspension plate 93 between the mounting cylinders 91 is smaller. On the one hand, it provides stable support between the mounting cylinders 91. On the other hand, it forms several protection chambers to prevent larger drill cuttings from entering through the gap between the mounting cylinder 91 and the fixed sleeve 61 and between the stirring plate 92 and the mounting cylinder 91 during the rotation of the mounting cylinder 91, allowing the sewage to fall layer by layer onto the surface of the second filter screen 72. Secondly, there is a gap between the bottom of the mounting cylinder 91 and the surface of the second filter screen 72, which prevents friction with the periphery of the second filter screen 72 when the mounting cylinder 91 rotates and provides a certain entry space for drill cuttings and sewage. When drill cuttings enter the second filter screen 72, due to the telescopic setting of the telescopic rod 82, there is no need to worry about jamming.

[0027] When the device is working specifically, the entire stirring and air suspension assembly 9 above can not only carry out the larger particle drill cuttings gathered above the stirring and air suspension assembly 9 when the drill rod 3 drives the drill bit 4 to rise, but also continuously stir the large particle drill cuttings on the surface of the second filter screen 72 when the auger 62 extracts the mixture of smaller drill cuttings and sewage. During the stirring process, space is continuously created to allow the smaller drill cuttings and sewage to have gaps to fall. The stirring rod 96 plays a stirring role, and the mounting cylinder 91 cooperates with the air suspension plate 93 to lift the drill cuttings, resulting in a momentary lifting and flowing process of the drill cuttings located above the mounting cylinder 91 and the air suspension plate 93 during the rotation of the mounting cylinder 91. Secondly, the air suspension plate 93 plays a first-layer protection role, enabling the sewage and drill cuttings to enter the following several support plates 94 from the diversion groove 95. Then, under the second-layer protection, it gradually flows onto the surface of the second filter screen 72 and finally into the water accumulation cover 71.

[0028] To sum up, the device realizes continuous slag discharge through the vertical-rotation decoupling movement of the pumping component 6 and the limiting component 5, relies on the double-layer filtration of the gathering component 7 and the dynamic blockage removal of the stirring and air suspension component 9 to eliminate particle size stratification and siltation, and combines with the adaptive obstacle avoidance characteristics of the elastic support component 8 to form a collaborative working mechanism of hierarchical interception-vortex disturbance-screw conveying. Furthermore, it effectively solves the problems that in the existing drilling equipment during road and bridge construction, when cooling the drill bit 4 by injecting water, it will cause the accumulation of large drill cuttings and sewage mixture in the hole, affecting the efficiency. The method of draining water while drilling has the problem that larger drill cuttings block the upper part, hindering the settlement of waste materials, resulting in the difficulty of effectively discharging the fine drill cuttings and sewage at the bottom.

[0029] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A self-protecting municipal road bridge drilling and punching device, comprising a land transport device (1), an energy-saving hydraulic lifting device (2) being provided on the land transport device (1), a drill rod (3) being provided at the output end of the energy-saving hydraulic lifting device (2), and a drill bit (4) being provided at the output end of the drill rod (3), wherein: A plurality of elastic support components (8) are circumferentially arranged on the drill bit (4) around the center of the drill bit, and a stirring and air-suspending component (9) for stirring drill cuttings is arranged on the elastic support component (8); The stirring air-holding assembly (9) comprises a mounting tube (91) fixedly mounted on the elastic support assembly (8), a plurality of stirring plates (92) are arranged in a circumferential direction around the center of the mounting tube (91), the stirring plates (92) are arranged in an inclined manner, an air-holding plate (93) is arranged between two adjacent stirring plates (92) and above the plurality of support plates (94), one end of the air-holding plate (93) is connected to the top end of one of the stirring plates (92), the other end of the air-holding plate (93) is arranged on the inclined surface of another adjacent stirring plate (92), a plurality of guide grooves (95) are provided on the inclined surface of the stirring plate (92) along its inclined direction, and a plurality of stirring rods (96) are evenly arranged on the top end of the stirring plate (92) perpendicular to the ground.

2. The self-protecting municipal road and bridge drilling and punching equipment according to claim 1 is characterized by: The outer sleeve of the drill rod (3) is provided with a pumping assembly (6), the pumping assembly (6) comprises a fixed sleeve (61), the bottom end of the fixed sleeve (61) is rotatably connected to the drill bit (4), the top end of the fixed sleeve (61) is arranged adjacent to the bottom of the energy-saving hydraulic lifting device (2), and the top end of the fixed sleeve (61) is connected to a drainage pipe, an auger (62) is rotatably arranged inside the fixed sleeve (61), the auger (62) is fixedly sleeved on the outside of the drill rod (3), a plurality of water inlets (63) are circumferentially opened at the bottom end of the fixed sleeve (61), and a first filter screen (64) is arranged on the water inlet (63); The fixed sleeve (61) is provided with symmetrical limiting grooves (65) on both sides, and the land transport device (1) is provided with a limiting component (5) in a direction directly opposite to the drill bit (4).

3. The self-protecting municipal road and bridge drilling and punching equipment according to claim 2 is characterized in that: The limiting assembly (5) comprises a mounting plate (51) fixedly connected to the land transport device (1), the mounting plate (51) being provided with an access hole (52) adapted to the drill bit (4), and a limiting rod (53) rotatably provided on the mounting plate (51) corresponding to the position of the limiting groove (65).

4. The self-protecting municipal road and bridge drilling and punching equipment according to claim 3 is characterized by: In the initial state, the limiting rod (53) is in a vertical state; in the working state, the limiting rod (53) is in a horizontal state, and the limiting rod (53) is slidably connected in the limiting groove (65).

5. The self-protecting municipal road and bridge drilling and punching equipment according to claim 2 is characterized in that: A gathering assembly (7) for gathering smaller drill cuttings mixture is provided at the bottom end of the fixed sleeve (61), the gathering assembly (7) comprising a water collection cover (71), the bottom end of the water collection cover (71) being rotatably connected to the drill bit (4), the top end of the water collection cover (71) being fixedly provided with a second filter screen (72), the second filter screen (72) being fixedly sleeved outside the fixed sleeve (61).

6. The self-protecting municipal road and bridge drilling and punching equipment according to claim 5 is characterized by: The inner diameter of the water collection cover (71) is larger than the inner diameter of the fixed sleeve (61), the outer diameter of the water collection cover (71) is smaller than the outer diameter of the drill bit (4), and the height of the water collection cover (71) is higher than the height of the water inlet (63).

7. The self-protecting municipal road and bridge drilling and punching equipment according to claim 5 is characterized by: The elastic support assembly (8) comprises a fixed rod (81) whose bottom end is fixedly connected to the drill bit (4); a telescopic rod (82) is arranged in the top end of the fixed rod (81); sliding grooves (83) are symmetrically provided on both sides of the fixed rod (81); a slider (84) is slidably connected in the sliding groove (83); the telescopic rod (82) is slidably connected in the fixed rod (81) via the slider (84); a telescopic spring (85) is arranged in the fixed rod (81) at the bottom of the telescopic rod (82); the telescopic rod (82) is elastically telescoped in the fixed rod (81) via the telescopic spring (85).

8. The self-protecting municipal road and bridge drilling and punching equipment according to claim 7 is characterized in that: The top end of the telescopic rod (82) is fixedly connected to one side of the mounting tube (91). In an initial state, the telescopic rod (82) is located such that the bottom end of the stirring plate (92) always tends to fit the surface of the second filter screen (72) via the telescopic spring (85).

9. The self-protecting municipal road and bridge drilling and punching equipment according to claim 5 is characterized by: The second filter screen (72) and the first filter screen (64) have the same filtering density.

10. The self-protecting municipal road and bridge drilling and punching equipment according to claim 2 is characterized in that: A plurality of support plates (94) are arranged between two adjacent stirring plates (92) from bottom to top, the support plates (94) are arranged in an inclined direction opposite to the stirring plates (92), the inclination direction of the air retention plates (93) is the same as the inclination direction of the support plates (94), the inclination angle of the stirring plates (92) is smaller than the inclination angle of the air retention plates (93), the inclination angle of the air retention plates (93) is smaller than the inclination angle of the support plates (94), and the side of the stirring plates (92) away from the mounting cylinder (91) is in contact with the outside of the fixed sleeve (61); There is a gap between the bottom of the mounting cylinder (91) and the surface of the second filter screen (72).

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