Drilling equipment for civil construction

Abstract

The invention relates to the field of drilling equipment, in particular to drilling equipment for civil construction, which comprises a mounting shell, a drill bit and a drill rod, the mounting shell is slidably arranged along the vertical direction, the drill bit is rotatably arranged below the mounting shell around the axis of the drill bit, the rotating axis of the drill bit extends along the vertical direction, and the drill rod is rotatably arranged in the drill bit around the axis of the drill rod. The drill rod can slidably penetrate through the drill bit in the axial direction of the drill rod, an included angle is formed between the drill rod and the drill bit, and the intersection point of the extension line of the axis of the drill rod and the extension line of the axis of the drill bit is located below the drill bit. Through cooperative arrangement of the drill rod and the drill bit, the drill rod retracts into the drill bit after drilling multiple inclined holes, one end of each inclined hole is located on the axis of the drilling starting point of the drill bit, in the drilling process of the drill bit, the inclined holes can guide the axis of the deviated drill bit to be close to the axis of the drill bit at the starting point position, and the deviation of the drill bit is reduced.

Description

Technical Field

[0001] The invention relates to the field of drilling equipment, in particular to a drilling equipment for civil construction. Background Art

[0002] In the field of civil construction, foundation quality is the core factor that determines the quality and safety of the entire construction project. A solid foundation relies on high-quality foundation holes, which provide the basis for the structural columns. Their accuracy and stability directly affect the bearing capacity and stability of the subsequent building structure. Therefore, the requirements for the performance of drilling equipment are extremely stringent.

[0003] At present, among all kinds of complex geological conditions, soil layers with more sand and gravel have brought many difficult problems to pile hole drilling. Sand and gravel, due to their hard texture, become the main obstacle to the advancement of the drill bit during the drilling process. Some sand and gravel surfaces are smooth, and the drill bit lacks sufficient friction to maintain a stable drilling direction when in contact; while sand and gravel with a certain slope will act like a wedge, generating lateral guidance and resistance when the drill bit applies pressure.

[0004] At the same time, the drill rod is relatively long in actual operation, which becomes a disadvantage when facing sand and gravel soil. Once the drill bit slips slightly under the action of sand and gravel, due to the large slenderness ratio of the drill rod and its flexibility, this slight deviation will be continuously magnified during the transmission process, eventually causing the pile hole to tilt significantly. Summary of the invention

[0005] Based on this, it is necessary to provide a drilling equipment for civil construction to address the problem that the drilling direction of the current drilling equipment deviates greatly during the drilling process.

[0006] The above purpose is achieved through the following technical solutions: A drilling device for civil engineering construction comprises a mounting shell, a drilling mechanism, a driving mechanism and a control mechanism. The mounting shell is slidably arranged in a vertical direction. The drilling mechanism comprises a drill bit, a drill rod and a reciprocating assembly. The drill bit is rotatably arranged around its own axis and is arranged below the mounting shell, and the rotation axis of the drill bit extends in a vertical direction. The drill rod is rotatably arranged inside the drill bit and the drill rod can slide through the drill bit along its own axial direction. The axis of the drill rod and the axis of the drill bit are located on the same vertical plane, and an angle is provided between the drill rod and the drill bit. The intersection of the extension line of the axis of the drill rod and the extension line of the axis of the drill bit is located below the drill bit. The driving mechanism is used to drive the drill bit and the drill rod to rotate alternately; the reciprocating assembly is used to control the drill rod to slide back and forth between the inside of the drill bit and the intersection of the extension lines of the axes of the drill rod and the drill bit when the drill rod rotates.

[0007] The drilling process of the drilling mechanism is divided into a first stage and a second stage. In the first stage, the driving mechanism controls the rotation of the drill pipe, and the drill pipe moves to the intersection point of the extension line of the drill bit axis under the action of the reciprocating assembly and then returns to the inside of the drill bit. In the second stage, the driving mechanism controls the rotation of the drill bit, and the drill bit drills downward by a preset distance, where the preset distance is the distance between the lower end of the drill bit and the intersection point of the extension line of the drill bit axis; the control mechanism is used to control the alternation of the first stage and the second stage of the drilling mechanism.

[0008] Preferably, there are multiple drill pipes and reciprocating assemblies. The multiple drill pipes and reciprocating assemblies are evenly distributed around the drill bit axis, and each drill pipe corresponds to a reciprocating assembly.

[0009] Preferably, each reciprocating assembly includes a rotating cylinder and a transmission part. The rotating cylinder is rotatably arranged on the drill bit, and the rotating cylinder is coaxial with the corresponding drill pipe. The drill pipe is slidably arranged in the rotating cylinder. A double-threaded groove is provided inside the rotating cylinder. A slider is rotatably arranged on the drill pipe, and the slider is slidably arranged in the double-threaded groove. The driving mechanism controls the rotation of the rotating cylinder and the drill pipe through the transmission part.

[0010] Preferably, the transmission part includes a fixed block, a first gear, a second gear, a toothed ring and a transmission rod. The fixed block is rotatably arranged on the mounting shell around the drill bit axis. The first gear is rotatably arranged on the fixed block and the first gear is coaxial with the rotating cylinder. The second gear is rotatably arranged on the fixed block and meshes with the first gear. The toothed ring is sleeved outside the second gear and is coaxial with the first gear. The toothed ring meshes with the second gear, and the toothed ring is fixedly connected with the rotating cylinder. One end of the transmission rod is fixedly connected with the first gear and the transmission rod is coaxial with the first gear. A clamping groove is provided on the end face of the drill bit. One end of the transmission rod is slidably arranged in the clamping groove along the axial direction of the drill bit. The transmission rod is clamped with the drill bit in the circumferential direction of the drill bit. The driving assembly can drive the toothed ring to rotate.

[0011] Preferably, the driving mechanism includes a motor, a telescopic rod and a third gear. The motor is arranged above the drill bit. The telescopic rod is located between the drill bit and the motor. One end of the telescopic rod is fixedly installed on the output shaft of the motor. The third gear is fixedly installed at the other end of the telescopic rod. The third gear is coaxial with the drill bit, and the third gear can mesh with the toothed ring. An irregular groove is provided on the drill bit. An irregular block is provided on the side of the third gear close to the drill bit. The irregular block is slidably connected with the irregular groove. After the telescopic rod extends, the irregular block can slide into the irregular groove and separate the third gear from the toothed ring.

[0012] Preferably, the drilling equipment for civil engineering construction further includes a vehicle carrier and a connecting rod. The vehicle carrier is arranged on the ground. The connecting rod is slidably arranged on the vehicle carrier in the vertical direction, and the bottom end of the connecting rod is connected with the mounting shell. The motor is fixedly installed on the connecting rod.

[0013] Preferably, the control mechanism includes an electromagnet and two sensors. The electromagnet is arranged in the special-shaped groove. After the electromagnet is powered on, it can adsorb the special-shaped block so that the special-shaped block is clamped with the drill bit, and the drill bit can rotate synchronously with the third gear. One of the sensors is arranged in the rotating cylinder. When the drill pipe extends out of the drill bit and then resets, the sensor in the rotating cylinder can control the electromagnet to be powered on. The other sensor is arranged on the vehicle. Let the distance between the intersection of the extension line of the axis of the drill pipe and the extension line of the axis of the drill bit and the middle of the drill bit be the preset distance. When the drill pipe moves a preset distance relative to the drill bit, the sensor on the vehicle controls the electromagnet to be powered off.

[0014] Preferably, the connecting rod is divided into multiple sections. The multiple sections of the connecting rod are arranged in the vertical direction, and the adjacent two sections of the connecting rod are connected by threads.

[0015] Preferably, a first cavity is provided inside the drill bit. A plurality of feeding ports are provided on the bottom surface of the drill bit. A plurality of groups of crushing heads are provided at the bottom of the drill bit. The number of each group of crushing heads is multiple, and each group of crushing heads corresponds to a feeding port.

[0016] Preferably, a sliding hole for the drill pipe to slide is provided at the bottom of the drill bit, and a brush is provided on the inner wall of the drill hole for brushing off the soil adhered to the drill pipe.

[0017] The beneficial effects of the present invention are as follows: Through the cooperative setting of the drill pipe and the drill bit, after the drill pipe drills out multiple inclined holes, it retracts into the drill bit. One end of the inclined hole is located on the axis of the starting point of the drill bit drilling. During the drilling process of the drill bit, the inclined hole can guide the axis of the deviated drill bit to approach the axis of the drill bit at the starting point position, reducing the deviation of the drill bit; during the drilling process, the drill bit and the drill pipe rotate alternately, enabling the drill bit to drill in sections, further reducing the deviation of the drill bit drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a drilling device for civil engineering construction provided by an embodiment of the present invention; Figure 2 is a right view of a drilling device for civil engineering construction provided by an embodiment of the present invention; Figure 3 is Figure 2 a cross-sectional view taken along the A-A direction in Figure 4 is Figure 3 an enlarged view at C in Figure 5 is Figure 3 an enlarged view at D in Figure 6 is Figure 2 a cross-sectional view taken along the B-B direction in Figure 7 is Figure 6 an enlarged view at E in Figure 8The bottom view of a drilling device for civil engineering construction provided by an embodiment of the present invention.

[0019] Wherein: 100, mounting shell; 101, drill bit; 102, drill pipe; 103, rotating cylinder; 104, fixing block; 105, first gear; 106, second gear; 107, tooth ring; 108, transmission rod; 109, annular groove; 110, clamping groove; 120, motor; 121, telescopic rod; 123, third gear; 124, double-threaded groove; 125, slider; 126, special-shaped groove; 127, special-shaped block; 128, spring; 129, connecting rod; 130, electromagnet; 131, first cavity; 132, crushing head; 133, feed inlet. Specific embodiments

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in the present invention, unless otherwise clearly defined and limited, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0023] Such as Figures 1 to 8As shown in the figure, a drilling device for civil engineering construction provided by an embodiment of the present invention includes an installation shell 100, a drilling mechanism, a driving mechanism, and a control mechanism. The installation shell 100 is slidably arranged in the vertical direction. The drilling mechanism includes a drill bit 101, a drill pipe 102, and a reciprocating assembly. The drill bit 101 is rotatably arranged below the installation shell 100 around its own axis, and the rotation axis of the drill bit 101 extends in the vertical direction. The drill pipe 102 is rotatably arranged in the drill bit 101 around its own axis, and the drill pipe 102 can slide axially through the drill bit 101. The axis of the drill pipe 102 and the axis of the drill bit 101 are located in the same vertical plane, and there is an included angle between the drill pipe 102 and the drill bit 101. The intersection point of the extension line of the axis of the drill pipe 102 and the extension line of the axis of the drill bit 101 is located below the drill bit 101. The driving mechanism is used to drive the drill bit 101 and the drill pipe 102 to rotate alternately; the reciprocating assembly is used to control the drill pipe 102 to reciprocate between the inside of the drill bit 101 and the intersection point of the extension lines of the axes of the drill pipe 102 and the drill bit 101.

[0024] The drilling process of the drilling mechanism is divided into a first stage and a second stage. In the first stage, the driving mechanism controls the drill pipe 102 to rotate, and the drill pipe 102 moves to the intersection point of the extension line of the axis of the drill bit 101 under the action of the reciprocating assembly and then returns to the inside of the drill bit 101; in the second stage, the driving mechanism controls the drill bit 101 to rotate, and the drill bit 101 drills downward a preset distance, and the preset distance is the distance between the lower end of the drill bit 101 and the intersection point of the extension lines of the axes of the drill pipe 102 and the drill bit 101; the control mechanism is used to control the first stage and the second stage of the drilling mechanism to alternate.

[0025] Through the cooperative setting of the drill pipe 102 and the drill bit 101, the drill pipe 102 retracts into the drill bit 101 after drilling a plurality of inclined holes. One end of the inclined hole is located on the axis of the starting point of the drill bit 101 drilling. During the drilling process of the drill bit 101, the inclined hole can guide the axis of the deflected drill bit 101 to approach the axis of the drill bit 101 at the starting point position, reducing the deviation of the drill bit 101; during the drilling process, the drill bit 101 and the drill pipe 102 rotate alternately, so that the drill bit 101 drills in segments, further reducing the deviation of the drill bit 101 drilling.

[0026] In this embodiment, there are multiple drill pipes 102 and reciprocating assemblies. The multiple drill pipes 102 and reciprocating assemblies are evenly distributed around the axis of the drill bit 101. Each drill pipe 102 corresponds to a reciprocating assembly. The multiple drill pipes 102 intersect at a point, and the intersection point is located directly below the drill bit 101. By setting multiple drill pipes 102, during the drilling process of the drill pipe 102, each drill pipe 102 is restricted by the positions of other drill pipes 102, and the inclined holes drilled by the drill pipe 102 are not easily deviated, and at the same time, the deviation correction range is increased.

[0027] In this embodiment, each reciprocating component includes a rotating cylinder 103 and a transmission part. The rotating cylinder 103 is rotatably arranged on the drill bit 101, and the rotating cylinder 103 is coaxial with the corresponding drill pipe 102. The drill pipe 102 is slidably arranged in the rotating cylinder 103, and the peripheral surface of the drill pipe 102 is slidably connected to the inner wall of the rotating cylinder 103. The rotating cylinder 103 can play a guiding role for the drill pipe 102. A bidirectional thread groove 124 is arranged inside the rotating cylinder 103. A slider 125 is rotatably arranged on the drill pipe 102, and the slider 125 is slidably arranged in the bidirectional thread groove 124. The slider 125 can reciprocally slide along the axial direction of the rotating cylinder 103 in the bidirectional thread groove 124. When the drill pipe 102 comes out of the inclined hole being drilled, its rotation direction remains unchanged, and it can well bring out the soil in the inclined hole, enabling the inclined hole to better guide the drill bit 101 during the drilling process. The driving mechanism controls the rotation of the rotating cylinder 103 and the drill pipe 102 through the transmission part.

[0028] In this embodiment, the transmission part includes a fixed block 104, a first gear 105, a second gear 106, a toothed ring 107, and a transmission rod 108. The fixed block 104 is rotatably arranged around the axis of the drill bit 101 on the mounting shell 100. A ring groove 109 is formed on the mounting shell 100, and the fixed block 104 is slidably arranged in the ring groove 109. The first gear 105 is rotatably arranged on the fixed block 104 and is coaxial with the rotating cylinder 103. The second gear 106 is rotatably arranged on the fixed block 104 and meshes with the first gear 105. The toothed ring 107 is sleeved outside the second gear 106 and is coaxial with the first gear 105. The toothed ring 107 meshes with the second gear 106 and is fixedly connected to the rotating cylinder 103. One end of the transmission rod 108 is fixedly connected to the first gear 105 and is coaxial with the first gear 105. A clamping groove 110 is formed on the end face of the drill bit 101. One end of the transmission rod 108 is slidably arranged in the clamping groove 110 along the axial direction of the drill bit 101. The transmission rod 108 is clamped with the drill bit 101 in the circumferential direction of the drill bit 101. The driving assembly can drive the toothed ring 107 to rotate. The rotation of the toothed ring 107 can drive the rotating cylinder 103 to rotate and drive the transmission rod 108 to rotate through the second gear 106 and the first gear 105. At this time, the transmission rod 108 can drive the drill bit 101 to drill. When the drill bit 101 rotates relative to the mounting shell 100, the fixed block 104 can rotate relative to the mounting shell 100 along with the drill bit 101.

[0029] In this embodiment, the driving mechanism includes a motor 120, a telescopic rod 121, and a third gear 123. The motor 120 is disposed above the drill bit 101. The telescopic rod 121 is located between the drill bit 101 and the motor 120. One end of the telescopic rod 121 is fixedly installed on the output shaft of the motor 120. The third gear 123 is fixedly installed at the other end of the telescopic rod 121. The telescopic rod 121 expands and contracts in the vertical direction. The third gear 123 is coaxial with the drill bit 101. Tooth teeth are provided on both the inner and outer circumferential surfaces of the tooth ring 107, and the third gear 123 can mesh with the tooth ring 107. An irregular groove 126 is provided on the drill bit 101. An irregular block 127 is provided on the surface of the third gear 123 close to the drill bit 101. The irregular block 127 is slidably connected to the irregular groove 126. After the telescopic rod 121 extends, the irregular block 127 can slide into the irregular groove 126 and the third gear 123 is separated from the tooth ring 107. A spring 128 is sleeved on the telescopic rod 121. Both ends of the spring 128 are fixedly connected to the telescopic rod 121 and the tooth ring 107 respectively. After the telescopic rod 121 extends, the spring 128 is stretched, and the elastic potential energy of the spring 128 increases, which can provide a restoring force for the telescopic rod 121.

[0030] In this embodiment, the drilling equipment for civil engineering construction further includes a vehicle and a connecting rod 129. The vehicle is disposed on the ground. The connecting rod 129 is slidably disposed on the vehicle in the vertical direction. The bottom end of the connecting rod 129 is connected to the mounting shell 100. The motor 120 is fixedly installed on the connecting rod 129. The vehicle controls the speed and direction of the connecting rod 129 moving in the vertical direction, so that the drill bit 101 can drill normally.

[0031] In this embodiment, the control mechanism includes an electromagnet 130 and two sensors. The electromagnet 130 is disposed in the special-shaped groove 126. After the electromagnet 130 is powered on, it can adsorb the special-shaped block 127 so that the special-shaped block 127 is clamped with the drill bit 101, and the drill bit 101 can rotate synchronously with the third gear 123. One of the sensors is disposed in the rotating cylinder 103. When the drill pipe 102 extends out of the drill bit 101 and then resets, the sensor in the rotating cylinder 103 can control the electromagnet 130 to be powered on. The other sensor is disposed on the vehicle. Let the distance between the intersection of the extension line of the axis of the drill pipe 102 and the extension line of the axis of the drill bit 101 and the middle of the drill bit 101 be a preset distance. When the drill pipe 102 moves a preset distance relative to the drill bit 101, the sensor on the vehicle controls the electromagnet to be powered off. After the drill pipe 102 in the first stage drills an inclined hole, it will return into the drill bit 101. At this time, the reversely moving drill pipe 102 will trigger the sensor in the rotating cylinder 103, and the sensor in the rotating cylinder 103 controls the electromagnet 130 to be powered on, so that the drilling equipment for civil engineering construction is switched from the first stage to the second stage. After the drill bit 101 comes into contact with the inclined holes drilled by multiple drill holes at the same time, it will gradually straighten the drilling direction under the guidance of the multiple inclined holes, and then move downward along the vertical direction until it moves to the intersection of the multiple inclined holes. At this time, the sensor on the vehicle detects the movement amount of the connecting rod 129 and controls the electromagnet 130 to be powered off, so that the drilling equipment for civil engineering construction is switched from the second stage to the first stage.

[0032] In this embodiment, the connecting rod 129 is divided into multiple segments. The multiple segments of the connecting rod 129 are arranged along the vertical direction, and the adjacent two segments of the connecting rod 129 are threadedly connected. The segmented design of the connecting rod 129 can increase the axial length of the connecting rod 129 according to the actual construction environment, which is convenient for drilling work at different depths; at the same time, it is also convenient for the transportation of the connecting rod 129.

[0033] In this embodiment, a first cavity 131 is provided inside the drill bit 101. A plurality of feed ports 133 are provided on the bottom surface of the drill bit 101. The feed ports 133 are evenly distributed. A plurality of groups of crushing heads 132 are provided at the bottom of the drill bit 101. The number of each group of crushing heads 132 is multiple, and each group of crushing heads 132 is provided corresponding to one feed port 133. When the drill bit 101 drills, the soil layer is crushed by the crushing heads 132, and then as the drill bit 101 feeds downward, the crushed soil enters the first cavity 131 from the feed ports 133, and the first cavity 131 collects the crushed soil.

[0034] In this embodiment, a sliding hole for the drill rod 102 to slide is provided at the bottom of the drill bit 101. A brush is provided on the inner wall of the drill hole for brushing off the soil adhered to the drill rod 102. The diameter of the sliding hole is the same as that of the drill rod 102. A groove is provided on the inner wall of the sliding hole. One end of the brush is arranged in the groove, and the other end can contact the drill rod 102. The brush is made of a material with better toughness, and the length of the groove in the axial direction of the drill rod 102 is greater than the length of the brush. After being bent by the axial thrust of the drill rod 102, the brush can be received in the groove, increasing the service life of the brush.

[0035] The working principle of a drilling device for civil engineering construction provided by the above embodiment is as follows: In the initial state, the drill rod is located inside the drill bit, and the electromagnet 130 is in a power-off state. First, the drill bit 101 is brought into contact with the ground. At this time, the drill bit 101 is vertically arranged. Then, the worker operates to control the power-off of the electromagnet 130. The telescopic rod 121 contracts under the action of the spring 128. The telescopic rod 121 drives the third gear 123 to move upward and engage with the tooth ring 107. Then, the drilling mechanism starts the first stage of drilling. The motor 120 is started. The motor 120 drives the third gear 123 to rotate through the telescopic rod 121. The third gear 123 drives the tooth ring 107 to rotate. The tooth ring 107 drives the rotating cylinder 103 to rotate. At the same time, the tooth ring 107 drives the second gear 106 to rotate. The second gear 106 drives the first gear 105 to rotate. The first gear 105 drives the transmission rod 108 to rotate. The transmission rod 108 drives the drill rod 102 to rotate. The rotating cylinder 103 and the drill rod 102 rotate in opposite directions. The drill rod 102 slides out of the drill bit 101 along its own axial direction and approaches the ground under the cooperation of the slider 125 and the double-threaded groove 124.

[0036] After the drill rod 102 contacts the ground, drilling starts. As the drill rod 102 moves, the inclined holes drilled by multiple drill rods 102 gradually approach until they intersect. At this time, the slider 125 moves to the turning point in the double-threaded groove 124. The slider 125 rotates on the drill rod 102 and changes the advancing direction. The slider 125 drives the drill rod 102 to slide in the reverse direction in the rotating cylinder 103. The rotating direction of the drill rod 102 remains unchanged, but the drill rod 102 gradually moves away from the ground and brings out the broken soil in the inclined hole until the drill rod 102 retracts into the drill bit 101, and the first stage ends.

[0037] When the slider 125 drives the drill pipe 102 to completely retract into the drill bit 101, the sensor in the rotary drum 103 detects the drill pipe 102 and then controls the electromagnet 130 to be energized. The electromagnet 130 generates magnetism to attract the special-shaped block 127. The special-shaped block 127 drives the third gear 123 to approach the drill bit 101. The third gear 123 drives the telescopic rod 121 to extend, and at the same time, the spring 128 is stretched until the special-shaped block 127 slides into the special-shaped groove 126 and contacts the electromagnet 130. At this time, the third gear 123 drives the drill bit 101 to rotate through the cooperation of the special-shaped block 127 and the special-shaped groove 126, and the drilling mechanism starts the second-stage drilling. After the drill bit 101 rotates, it starts to drill on the ground. If the drilling direction of the drill bit 101 is deflected and the middle part of the drill bit 101 is drilled through and enters one of the inclined holes, the drill bit 101 gradually approaches the intersection position of the multiple inclined holes under the guidance of the inclined hole. When the drill bit 101 contacts the multiple inclined holes at the same time, the alignment efficiency of the drill bit 101 is improved. When the drill bit 101 moves to the intersection position of the multiple inclined holes, the axis of the drill bit 101 coincides with the axis of its starting point. During this process, the drill bit 101 drives the connecting rod 129 to move downward through the mounting shell 100. At this time, the connecting rod 129 moves a preset distance relative to the vehicle, and the second stage ends. The sensor on the vehicle will control the electromagnet 130 to be powered off, and the third gear 123 resets under the action of the spring 128, and the special-shaped block 127 is separated from the drill bit 101.

[0038] The reset third gear 123 will mesh with the toothed ring 107 again, then drive the toothed ring 107 to rotate, and then repeat the drilling process of the first stage. The first stage and the second stage are alternately carried out, so that the drill bit 101 performs multi-stage drilling until the drill bit 101 reaches the required depth.

[0039] During the drilling process, the drill bit 101 will collect the crushed soil into the first cavity 131. After the drill bit 101 drills to a certain depth, it is necessary to discharge the crushed soil in the first cavity 131, and then carry out the drilling work again.

[0040] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0041] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A drilling device for civil construction, characterized in that: include: The mounting shell, drilling mechanism, driving mechanism and control mechanism are provided. The mounting shell is slidably arranged in the vertical direction. The drilling mechanism includes a drill bit, a drill rod and a reciprocating assembly. The drill bit is rotatably arranged around its own axis and is arranged below the mounting shell. The rotation axis of the drill bit extends in the vertical direction. The drill rod is rotatably arranged inside the drill bit around its own axis. The drill rod can slide through the drill bit along its own axial direction. The axis of the drill rod and the axis of the drill bit are located on the same vertical plane. An angle is provided between the drill rod and the drill bit. The intersection of the extension line of the axis of the drill rod and the extension line of the axis of the drill bit is located below the drill bit. The driving mechanism is used to drive the drill bit and the drill rod to rotate alternately. The reciprocating assembly is used to control the drill rod to slide back and forth between the inside of the drill bit and the intersection of the extension lines of the axes of the drill rod and the drill bit when the drill rod rotates. The drilling process of the drilling mechanism is divided into a first stage and a second stage. In the first stage, the driving mechanism controls the rotation of the drill rod, and the drill rod moves to the intersection with the extension line of the drill bit axis under the action of the reciprocating assembly and then returns to the inside of the drill bit; in the second stage, the driving mechanism controls the rotation of the drill bit, and the drill bit drills downward a preset distance, which is the distance between the lower end of the drill bit and the intersection of the drill rod and the extension line of the drill bit axis; the control mechanism is used to control the first and second stages of the drilling mechanism alternately.

2. A drilling device for civil construction according to claim 1, characterized in that: There are multiple drill rods and reciprocating assemblies, which are evenly distributed around the drill bit axis, and each drill rod corresponds to a reciprocating assembly.

3. A drilling device for civil construction according to claim 2, characterized in that: Each reciprocating assembly includes a rotating drum and a transmission part. The rotating drum is rotatably arranged on the drill bit, and the rotating drum is coaxial with the corresponding drill rod, and the drill rod is slidably arranged in the rotating drum. A bidirectional thread groove is arranged inside the rotating drum, and a sliding block is rotatably arranged on the drill rod. The sliding block is slidably arranged in the bidirectional thread groove. The driving mechanism controls the rotation of the rotating drum and the drill rod through the transmission part.

4. A drilling device for civil construction according to claim 3, characterized in that: The transmission part includes a fixed block, a first gear, a second gear, a gear ring and a transmission rod. The fixed block is rotatably arranged on the mounting shell around the axis of the drill bit. The first gear is rotatably arranged on the fixed block and is coaxial with the rotating drum. The second gear is rotatably arranged on the fixed block and meshes with the first gear. The gear ring is sleeved outside the second gear and is coaxial with the first gear. The gear ring meshes with the second gear and is fixedly connected to the rotating drum. One end of the transmission rod is fixedly connected to the first gear and the transmission rod is coaxial with the first gear. A slot is provided on the end face of the drill bit. One end of the transmission rod is slidably arranged in the slot along the axial direction of the drill bit. The transmission rod is clamped with the drill bit in the circumferential direction of the drill bit. The driving assembly can drive the gear ring to rotate.

5. A drilling device for civil construction according to claim 4, characterized in that: The driving mechanism includes a motor, a telescopic rod and a third gear. The motor is arranged above the drill bit, the telescopic rod is located between the drill bit and the motor, and one end of the telescopic rod is fixedly mounted on the output shaft of the motor. The third gear is fixedly mounted on the other end of the telescopic rod. The third gear is coaxial with the drill bit, and the third gear can mesh with the gear ring. A special-shaped groove is provided on the drill bit, and a special-shaped block is provided on a side of the third gear close to the drill bit. The special-shaped block is slidably connected to the special-shaped groove. When the telescopic rod is extended, the special-shaped block can slide into the special-shaped groove and the third gear can be separated from the gear ring.

6. A drilling device for civil construction according to claim 5, characterized in that: It also includes a carrier and a connecting rod. The carrier is arranged on the ground. The connecting rod is slidably arranged on the carrier along the vertical direction. The bottom end of the connecting rod is connected to the mounting shell. The motor is fixedly installed on the connecting rod.

7. A drilling device for civil construction according to claim 6, characterized in that: The control mechanism includes an electromagnet and two sensors. The electromagnet is arranged in the special-shaped groove. After the electromagnet is energized, it can absorb the special-shaped block so that the special-shaped block is engaged with the drill bit, and the drill bit can rotate synchronously with the third gear. One of the sensors is arranged in the rotating drum. When the drill rod extends out of the drill bit and resets, the sensor in the rotating drum can control the electromagnet to be energized. The other sensor is arranged on the carrier. The distance between the intersection of the extension line of the axis of the drill rod and the extension line of the axis of the drill bit and the middle of the drill bit is set as a preset distance. When the drill rod moves the preset distance relative to the drill bit, the sensor on the carrier controls the electromagnet to be powered off.

8. The drilling equipment for civil construction according to claim 6, characterized in that: The connecting rod is divided into multiple sections, the multiple sections of the connecting rod are arranged along the vertical direction, and two adjacent sections of the connecting rod are threadedly connected.

9. The drilling equipment for civil construction according to claim 1, characterized in that: A first cavity is arranged inside the drill bit, a plurality of feed ports are arranged on the bottom surface of the drill bit, and a plurality of groups of crushing heads are arranged at the bottom of the drill bit, each group of crushing heads has a plurality of crushing heads, and each group of crushing heads corresponds to a feed port.

10. The drilling equipment for civil construction according to claim 1, characterized in that: A sliding hole is provided at the bottom of the drill bit for the drill rod to slide, and a brush is provided on the inner wall of the drill hole to brush off the soil adhering to the drill rod.

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