A large-diameter bored pile combined hole-forming apparatus

Abstract

The utility model relates to a pore forming equipment technical field especially relates to a large diameter bored pile combined pore forming equipment. Its technical scheme includes the drilling machine, the carousel of sliding installation on the drilling machine, the drill rod of detachable installation on the carousel, the drill bit of fixed installation on the drill rod, the sealing component of fixed installation on the top of drill rod, the sealing component includes the sealing head of fixed installation on the drill rod, the sealing cover of fixed installation on the drilling machine, install a plurality of sealing rings in sealing cover, the sealing component includes a plurality of tightening assembly and starting assembly. The utility model discloses through setting up a plurality of sealing rings, and through the tightening assembly control below sealing ring not with sealing head contact, when the sealing ring above fails, starts below sealing ring, can effectively prevent the early wear and tear of below sealing ring, makes a plurality of sealing ring relay type seal, can effectively improve the effective service life of the sealing component.

Description

Technical Field

[0001] This utility model relates to the field of hole-forming equipment technology, and in particular to a combined hole-forming equipment for large-diameter bored piles. Background Technology

[0002] Currently, deep-water foundations for bridges mainly employ caisson foundations, box caisson foundations, bored pile foundations, and combined foundations. Bored pile foundations are a commonly used type of foundation. Holes are typically drilled using either forward or reverse circulation drilling methods. This method is suitable for large-diameter, deep-hole drilling, stable geological formations, or drilling pile construction requiring efficient hole cleaning. In reverse circulation, the drilling mud relies primarily on the negative pressure inside the drill rod to rapidly pump the drilling mud and cuttings from the bottom of the hole up to the surface.

[0003] In reverse circulation drilling, the drill rig's power head and swivel need to be rotated and sealed. This design causes the seals to be subjected to triple damage from high-speed friction, mud erosion, and high-pressure impact over a long period of time, making them extremely prone to wear and leakage. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a combined drilling equipment for large-diameter bored piles that can extend the sealing life and prevent leakage during operation.

[0005] The technical solution of this utility model: A combined drilling equipment for large-diameter bored piles, comprising a drilling rig, a turntable slidably mounted on the drilling rig, a drill rod detachably mounted on the turntable, and a drill bit fixedly mounted on the drill rod, and further comprising:

[0006] A sealing component is fixedly installed on the top of the drill pipe. The sealing component includes a sealing head fixedly installed on the drill pipe and a sealing cover fixedly installed on the drilling rig. Multiple sets of sealing rings are installed inside the sealing cover.

[0007] The sealing component includes multiple sets of tightening components and actuation components. The tightening components control the expansion of the sealing ring to increase the distance between the sealing ring and the sealing head. The actuation components control the lower sealing ring to contract when the upper sealing ring fails.

[0008] Optionally, multiple sealing plates are fixedly installed on the sealing head, and the sealing plates are provided with pressure grooves that cooperate with the sealing ring.

[0009] Optionally, the tightening assembly includes multiple control grooves disposed within the sealing cover, with the top sealing ring directly connected to the sealing cover, and the remaining sealing rings located inside the control grooves.

[0010] Optionally, the tightening assembly further includes multiple one-way valves fixedly installed on the sealing cover. Each one-way valve corresponds to and is connected to the control slot, and the air pressure inside the control slot is lower than the external air pressure.

[0011] Optionally, the starting assembly includes multiple gas cylinders fixedly installed on the sealing cover. The gas cylinders are filled with high-pressure gas. Each gas cylinder corresponds to and is connected to the control slot. A valve is connected between the gas cylinder and the control slot. The valve includes a valve body and a valve core rotatably installed inside the valve body. The starting assembly also includes a transmission assembly for detecting whether the upper sealing ring has failed and controlling the opening and closing of the valve.

[0012] Optionally, the transmission assembly includes a transmission rod fixedly connected to the valve core, a sealing block fixedly mounted on the transmission rod, a slide cylinder rotatably mounted on the sealing cover, and the sealing block and the slide cylinder being slidably connected and having a sealing treatment.

[0013] Optionally, the transmission assembly further includes a guide groove disposed within the sealing cover. The guide groove corresponds one-to-one with the sealing plate and is located below the sealing plate. The sealing cover is provided with a guide hole communicating with the guide groove. A conveying pipe is fixedly installed on the guide hole, and the other end of the conveying pipe is connected to one end of the slide.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] This application sets up multiple sealing rings and controls the lower sealing ring to not contact the sealing head through a tightening component. When the upper sealing ring fails, the lower sealing ring is activated, which can effectively prevent the lower sealing ring from wearing out prematurely. The multiple sealing rings work in relay to seal, which can effectively improve the service life of the sealing component and prevent the need to stop the machine to replace the sealing component after long-term operation, thus effectively improving work efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the hole-forming equipment.

[0017] Figure 2 Schematic diagram of the sealing component Figure 1 ;

[0018] Figure 3 Schematic diagram of the sealing component Figure 2 ;

[0019] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0020] Figure 5 This is a schematic diagram of the startup component;

[0021] Figure 6 This is a schematic diagram of the sealing head and sealing cover.

[0022] Reference numerals: 1. Drilling rig; 101. Rotary table; 102. Drill rod; 103. Drill bit; 2. Sealing components; 201. Sealing head; 202. Sealing plate; 203. Sealing cover; 204. Sealing ring; 205. Control groove; 206. Check valve; 207. Gas tank; 208. Valve; 209. Drive rod; 210. Sealing block; 211. Slide cylinder; 212. Guide groove; 213. Guide hole; 214. Delivery pipe; 215. Pressure groove. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, this utility model proposes a combined drilling equipment for large-diameter bored piles, including a drilling rig 1, a turntable 101 slidably mounted on the drilling rig 1, a drill rod 102 detachably mounted on the turntable 101, and a drill bit 103 fixedly mounted on the drill rod 102. The turntable 101 drives the drill rod 102 to rotate, and the rotating drill rod 102 drives the drill bit 103 to open the hole. The drilling is completed by discharging mud to the ground through positive or reverse circulation. When drilling deep holes, it is necessary to connect single drill rods. That is, as the drilling depth extends, it is necessary to continuously connect multiple drill rods 102. In this embodiment, the drilling rig 1 is equipped with a lifting mechanism that controls the lifting and lowering of the turntable 101. The lifting mechanism lifts the drill rod 102 to facilitate the connection of single drill rods 102.

[0025] like Figures 2 to 6 As shown, this embodiment also includes a sealing component 2 fixedly installed on the top of the drill rod 102. The sealing component 2 includes a sealing head 201 fixedly installed on the drill rod 102 and a sealing cover 203 fixedly installed on the drilling rig 1. Multiple sets of sealing rings 204 are installed inside the sealing cover 203. The sealing rings 204 seal the gap between the sealing head 201 and the sealing cover 203 to complete the sealing. Multiple sealing plates 202 are fixedly installed on the sealing head 201. The sealing plate 202 is provided with a pressure groove 215 that cooperates with the sealing ring 204. When the sealing effect of the sealing ring 204 is effective, the sealing ring 204 will contact the pressure groove 215 under the action of its own elasticity to complete the sealing work.

[0026] It should be noted that while setting multiple sealing rings 204 can improve the sealing effect, multiple sealing rings 204 will be worn simultaneously by the rotation of the sealing head 201. Therefore, setting multiple sealing rings 204 can only improve the sealing effect and cannot effectively improve the sealing life.

[0027] Furthermore, the sealing component 2 includes multiple sets of tightening components and a starting component. The tightening components control the expansion of the sealing ring 204, increasing the distance between the sealing ring 204 and the sealing head 201. The tightening components prevent the sealing ring 204 from contacting the sealing head 201. At this time, the sealing ring 204 does not perform a sealing function and will not be worn. The upper sealing ring 204 will then seal the space between the sealing head 201 and the sealing cover 203. When the upper sealing ring 204 fails, the starting component controls the lower sealing ring 204 to contract. After the upper sealing ring 204 wears out, the lower sealing ring 204 is activated, ensuring the continuity of the seal. There is no need to stop the machine to replace the seal. It can work continuously, improving work efficiency and allowing multiple sealing rings 204 to achieve a relay-style sealing effect, thereby effectively increasing the single service life of the sealing component 2.

[0028] In this embodiment, the tightening assembly includes multiple control grooves 205 disposed within the sealing cover 203. A top sealing ring 204 is directly connected to the sealing cover 203, serving as the first line of defense. When this sealing ring 204 fails, the lower sealing rings 204 will be activated. The remaining sealing rings 204 are all located inside the control grooves 205. The tightening assembly also includes multiple one-way valves 206 fixedly installed on the sealing cover 203. Each one-way valve 206 corresponds to and communicates with a control groove 205. The air pressure inside the control groove 205 is lower than the external air pressure. When the air pressure inside the control groove 205 is lower than the external air pressure, the sealing ring 204 located inside the control groove 205 will be subjected to unidirectional pressure, that is, the sealing ring 204 will retract into the control groove 205. At this time, the sealing ring 204 will not directly contact the sealing head 201, thereby preventing the sealing ring 204 from wearing out prematurely. When the upper sealing ring 204 wears out, it is only necessary to restore the air pressure inside the control groove 205 to the normal state or the high pressure state, so that the sealing ring 204 can seal the sealing head 201 under its own elasticity or the pressure inside the control groove 205.

[0029] In this embodiment, the starting component includes multiple gas cylinders 207 fixedly installed on the sealing cover 203. The gas cylinders 207 are filled with high-pressure gas. Each gas cylinder 207 corresponds to and is connected to a control groove 205. A valve 208 is connected between the gas cylinders 207 and the control groove 205. The valve includes a valve body and a valve core rotatably installed inside the valve body. The starting component also includes a transmission component that detects whether the upper sealing ring 204 has failed and controls the opening and closing of the valve. When the upper sealing ring 204 has not failed, the lower valve 208 will be in a closed state. When the upper sealing ring 204 fails, the lower valve 208 can be opened by controlling the rotation of the valve core. At this time, the high-pressure gas inside the gas cylinder 207 is released into the control groove 205, so that the sealing ring 204 contacts the sealing head 201 and performs an effective seal.

[0030] Furthermore, the transmission assembly includes a transmission rod 209 fixedly connected to the valve core, a sealing block 210 fixedly mounted on the transmission rod 209, and a slide cylinder 211 rotatably mounted on the sealing cover 203. The sealing block 210 is slidably connected to the slide cylinder 211 and is provided with a sealing treatment. By applying pressure to one end of the slide cylinder 211, the sealing block 210 can be pushed to move, thereby driving the transmission rod 209 to move. The transmission rod 209 can then push the valve core to rotate, thereby controlling the valve 208 to open.

[0031] Furthermore, the transmission assembly also includes a guide groove 212 located inside the sealing cover 203. The guide groove 212 corresponds one-to-one with the sealing plate 202 and is located below the sealing plate 202. The sealing cover 203 is provided with a guide hole 213 communicating with the guide groove 212. A delivery pipe 214 is fixedly installed on the guide hole 213. The other end of the delivery pipe 214 is connected to one end of the slide cylinder 211. When the upper sealing ring 204 fails, the air pressure or hydraulic pressure through the sealing cover 203 will penetrate into the guide groove 212 and enter the slide cylinder 211 through the guide hole 213 and the delivery pipe 214. This will drive the valve core to rotate, thereby activating the lower sealing ring 204 after the upper sealing ring 204 fails. This allows multiple sealing rings 204 to perform relay sealing in sequence, thereby effectively improving the total service life of the sealing component 2.

[0032] Working principle: When the air pressure inside the control groove 205 is lower than the outside air pressure, the sealing ring 204 located inside the control groove 205 will be subjected to unidirectional pressure, that is, the sealing ring 204 will retract into the control groove 205. At this time, the sealing ring 204 will not directly contact the sealing head 201, thereby preventing the sealing ring 204 from wearing out prematurely.

[0033] When the upper sealing ring 204 fails, the air pressure or hydraulic pressure through the sealing cover 203 will penetrate into the guide groove 212 and enter the slide cylinder 211 through the guide hole 213 and the delivery pipe 214, which will drive the valve core to rotate. At this time, the high-pressure gas inside the gas tank 207 is released into the control groove 205, so that the sealing ring 204 contacts the sealing head 201 and performs an effective seal.

[0034] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A combined drilling equipment for large-diameter bored piles, comprising a drilling rig (1), a turntable (101) slidably mounted on the drilling rig (1), a drill rod (102) detachably mounted on the turntable (101), and a drill bit (103) fixedly mounted on the drill rod (102), characterized in that, Also includes: A sealing component (2) is fixedly installed on the top of the drill rod (102). The sealing component (2) includes a sealing head (201) fixedly installed on the drill rod (102) and a sealing cover (203) fixedly installed on the drilling machine (1). Multiple sets of sealing rings (204) are installed inside the sealing cover (203). The sealing component (2) includes multiple sets of tightening components and a starting component. The tightening component controls the expansion of the sealing ring (204) to increase the distance between the sealing ring (204) and the sealing head (201). The starting component controls the lower sealing ring (204) to contract when the upper sealing ring (204) fails.

2. The combined drilling equipment for large-diameter bored piles according to claim 1, characterized in that, Multiple sealing plates (202) are fixedly installed on the sealing head (201), and the sealing plate (202) is provided with a pressure groove (215) that cooperates with the sealing ring (204).

3. The combined drilling equipment for large-diameter bored piles according to claim 2, characterized in that, The tightening assembly includes multiple control grooves (205) disposed within the sealing cover (203), with the top sealing ring (204) directly connected to the sealing cover (203), and the remaining sealing rings (204) all located inside the control grooves (205).

4. The combined drilling equipment for large-diameter bored piles according to claim 3, characterized in that, The tightening assembly also includes a plurality of one-way valves (206) fixedly installed on the sealing cover (203). The one-way valves (206) correspond one-to-one with the control slot (205) and are connected. The air pressure inside the control slot (205) is lower than the external air pressure.

5. The combined drilling equipment for large-diameter bored piles according to claim 4, characterized in that, The starting assembly includes multiple gas cylinders (207) fixedly installed on the sealing cover (203). The gas cylinders (207) are filled with high-pressure gas. The gas cylinders (207) correspond one-to-one with the control slot (205) and are connected. A valve (208) is connected between the gas cylinders (207) and the control slot (205). The valve includes a valve body and a valve core rotatably installed inside the valve body. The starting assembly also includes a transmission assembly that detects whether the upper sealing ring (204) is faulty and controls the opening and closing of the valve.

6. The combined drilling equipment for large-diameter bored piles according to claim 5, characterized in that, The transmission assembly includes a transmission rod (209) fixedly connected to the valve core, a sealing block (210) fixedly installed on the transmission rod (209), and a slide cylinder (211) rotatably installed on the sealing cover (203). The sealing block (210) is slidably connected to the slide cylinder (211) and is provided with a sealing treatment.

7. The combined drilling equipment for large-diameter bored piles according to claim 6, characterized in that, The transmission assembly also includes a guide groove (212) disposed in the sealing cover (203). The guide groove (212) corresponds one-to-one with the sealing plate (202) and is located below the sealing plate (202). The sealing cover (203) is provided with a guide hole (213) communicating with the guide groove (212). A conveying pipe (214) is fixedly installed on the guide hole (213). The other end of the conveying pipe (214) is connected to one end of the slide cylinder (211).

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