Environment-friendly noise-reducing and slag-discharging construction method for rotary excavating split type drill bit

Abstract

The invention relates to the technical field of noise reduction and slag discharge construction, and discloses a rotary excavating split type drill bit green noise reduction and slag discharge construction method which comprises the following construction steps that (1) a drill barrel comprises a top head, a fixed half barrel and a movable half barrel, in the drilling process of the drill barrel, the movable half barrel and the fixed half barrel define a barrel cavity with an opening in the bottom, and the movable half barrel is arranged in the barrel cavity; soil enters the barrel cavity from the bottom opening, and a pile hole is formed in the construction site; a plurality of drilling teeth are respectively arranged at the bottoms of the fixed half cylinder and the movable half cylinder; (2) the drill barrel is lifted out of the pile hole; (3) the movable half cylinder swings away from the fixed half cylinder and is arranged in a separated mode, the drilling cylinder is in an open state, and soil in a cylinder cavity is discharged to a construction site; (4) the movable half cylinder swings relative to the fixed half cylinder until the drill cylinder is in an enclosed state; and (5) muck on the construction site is cleaned. And through the structural design and the step flow of the drilling barrel, the efficient and environment-friendly deslagging construction effect is achieved, and the practical value is high.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of noise reduction and slag removal construction, specifically, to a green noise reduction and slag removal construction method for a rotary split drill bit. Background Art

[0002] Rotary drilling rig is a highly efficient foundation construction equipment, widely used in building pile foundation projects, bridge foundation projects, etc.

[0003] However, during the rotary drilling construction process, the slag discharge efficiency and noise control of the drill barrel are important factors affecting construction efficiency and environmental friendliness. At present, the existing construction methods still have obvious deficiencies in these two important factors.

[0004] In existing technologies, when encountering complex formations such as clay layers, fractured rocks, and strongly weathered rocks, the debris inside the drill barrel tends to become dense, making it difficult to remove the debris. Traditional methods usually require repeatedly rotating the drill bucket or using sudden braking measures to shake out the rock debris in the drill barrel. Some even require manual use of an excavator to ram the drill barrel to assist in removing the debris. These operations are not only inefficient but also prone to equipment failure and safety accidents.

[0005] In addition, the slag discharge process involves contact and collision between machines, such as the excavator hitting the drill barrel, sudden braking and other operations, which will generate a lot of noise. Noise pollution not only causes great trouble to the lives of surrounding residents, but may also lead to complaints, penalties, or even orders to suspend work for rectification due to excessive noise. Therefore, noise pollution has become one of the main problems that need to be solved urgently during the slag discharge construction of rotary drilling barrels. Summary of the Invention

[0006] The purpose of the present invention is to provide a green noise reduction and slag discharge construction method for a rotary drilling open-body drill bit, aiming to solve the problem of excessive noise during slag discharge construction of a rotary drilling barrel in the prior art.

[0007] The present invention is achieved by a green noise reduction and slag removal construction method for a split-body rotary drilling bit, comprising the following construction steps:

[0008] 1) Drilling at the construction site using a drill pipe, the drill pipe comprising a top head, a fixed half-pipe and a movable half-pipe, the fixed half-pipe being fixedly connected to the top head, the movable half-pipe being swingably connected to the top head, and the movable half-pipe being arranged facing the fixed half-pipe;

[0009] During the drilling process, the drill barrel is in an enclosed state, with the movable half barrel and the fixed half barrel fixedly arranged facing each other. The movable half barrel and the fixed half barrel are enclosed together to form a barrel cavity with a bottom opening. Soil enters the barrel cavity through the bottom opening, and a pile hole is formed on the construction site. A plurality of drill teeth are respectively provided at the bottom of the fixed half barrel and the bottom of the movable half barrel. The plurality of drill teeth are formed at the bottom opening and are arranged along the radial direction of the bottom opening.

[0010] 2) lifting the drill pipe out of the pile hole;

[0011] 3) The movable half-cylinder is swung away from the fixed half-cylinder. The movable half-cylinder is separated from the fixed half-cylinder, the cylinder cavity is opened, the bottom opening is opened, the drill cylinder is in an open state, and the soil in the cylinder cavity is discharged onto the construction site to form slag;

[0012] 4) Swing the movable half cylinder relative to the fixed half cylinder until the drill tube is in a closed state;

[0013] 5) Clean up the debris at the construction site.

[0014] Furthermore, in the construction step 1), the top head is connected to the drill rod of the rotary drilling rig, and the drill rod rotates to drive the drill barrel to drill in the construction site; in the construction step 2), when the drill barrel has drilled 70% to 80% of its height in the construction site, the drill barrel is lifted out of the pile hole.

[0015] Furthermore, in the construction step 1), the top head has a top hole with a top opening. After the drill rod is inserted into the top hole, a pin is passed through the top head, and the pin passes through the drill rod synchronously to relatively fix the drill rod and the top head.

[0016] Furthermore, a locking structure is provided between the top of the fixed half-cylinder and the top of the movable half-cylinder, and a buckle structure is provided between the bottom of the fixed half-cylinder and the bottom of the movable half-cylinder. When the locking structure is in a locked state, the buckle structure is in a connected state, and the buckle structure restricts the movable half-cylinder from swinging away from the fixed half-cylinder.

[0017] In the construction step 1), when the drill barrel is in the enclosed state during drilling, the locking structure is in the locked state and the snap-fit ​​structure is in the connected state; in the construction step 3), before the movable half-cylinder is swung away from the fixed half-cylinder, the locking structure is unlocked so that the locking structure is in the unlocked state and the snap-fit ​​structure is in the disengaged state.

[0018] Furthermore, the locking structure includes a main pressure rod that moves longitudinally and a secondary pressure rod that moves longitudinally, the main pressure rod is connected to a linkage structure, and the linkage structure is connected to a swinging top block;

[0019] In the construction step 3), the main pressure rod is moved downward, and the main pressure rod drives the top block to swing through the linkage structure. The top block is separated from the support restriction of the auxiliary pressure rod, and the auxiliary pressure rod moves downward, driving the movable half-cylinder to move downward. After the snap structure is in the disengaged state, the movable half-cylinder is swung away from the fixed half-cylinder to open the drill barrel.

[0020] Furthermore, the upper portion of the main pressure rod extends above the fixed half-cylinder to form a main upper section, and the main upper section is connected to a main spring that drives the main pressure rod to return upward; the lower portion of the main pressure rod forms a main lower section, and the linkage structure is connected to the main lower section; the auxiliary pressure rod is provided with a transverse portion;

[0021] In the construction step 1), during the drilling process of the drill tube in the construction site, the drill tube is in an enclosed state, the top block supports the transverse portion from bottom to top, restricting the auxiliary pressure rod from moving downward, the locking structure is in a locked state, and the buckle structure is in a connected state;

[0022] In the construction step 3), after the drill tube is pulled out of the pile hole, the main pressure rod moves downward, the linkage structure drives the top block to swing, the top block is separated from the support of the horizontal part, the locked state is in the unlocked state, the secondary pressure rod moves downward, driving the movable half cylinder to move downward, so that the snap structure is in a disengaged state.

[0023] Furthermore, the auxiliary pressure rod extends above the movable half-cylinder to form an auxiliary upper section, the auxiliary upper section is connected to an auxiliary spring that drives the auxiliary pressure rod to return upward, the lower part of the auxiliary pressure rod forms a auxiliary lower section, and the top of the movable half-cylinder has a top plate;

[0024] In the construction step 3), when the locking structure is in the unlocked state, the auxiliary pressure rod moves downward, and the auxiliary lower section presses the top plate downward, driving the movable half cylinder to move downward, so that the snap structure is in the disengaged state.

[0025] Furthermore, the buckle structure includes a bent hook and a slot formed at the bottom of the fixed half-cylinder, one end of the hook is connected to the bottom of the movable half-cylinder, and the other end of the buckle is bent upward;

[0026] In the construction step 1), when the buckle structure is in the connected state, the hook is inserted into the slot from bottom to top; in the construction step 3), when the buckle structure is in the disengaged state, the buckle is disengaged from the slot from top to bottom.

[0027] Furthermore, the inner side wall of the fixed half-cylinder is provided with a plurality of longitudinal elastic strips, the longitudinal elastic strips are arranged in a curved manner, and the ends of the longitudinal elastic strips are butted against the inner side wall of the fixed half-cylinder, and the longitudinal elastic strips and the inner side wall of the fixed half-cylinder enclose a longitudinal cavity arranged in a longitudinal direction;

[0028] A hard longitudinal strip is provided in the longitudinal cavity, the longitudinal strip is fixedly connected to the middle portion of the longitudinal elastic strip, and has a longitudinal gap with the inner side wall of the fixed half-cylinder;

[0029] In the construction step 1), after the soil enters the cylinder cavity, it squeezes the longitudinal elastic strip and deforms it laterally until the longitudinal strip abuts against the inner wall of the fixed half cylinder, and the longitudinal elastic strip is in compression deformation; in the construction step 3), when the drill barrel is in the open state, the longitudinal elastic strip elastically resets and deforms outward, driving the soil in the cylinder cavity to break away from the inner wall of the fixed half cylinder.

[0030] Furthermore, the inner side wall of the movable half-cylinder is provided with a plurality of transversely arranged transverse elastic strips, the transverse elastic strips being arranged in a curved manner along the circumference of the movable half-cylinder, the interior of the transverse elastic strips being arranged hollow, forming a transversely curved transverse cavity; a free strip is provided in the transverse cavity with a counterweight and is freely arranged in the transverse cavity, and the diameter of the free strip is smaller than the diameter of the transverse cavity;

[0031] In the construction step 1), after the soil enters the cylinder cavity, it squeezes the transverse elastic strip and deforms it longitudinally until the free strip is pressed by the transverse elastic strip and is in a relatively fixed state, and the transverse elastic strip is in a compressed deformation; in the construction step 3), when the drill barrel is in an open state, the transverse elastic strip elastically resets and deforms outward, driving the soil in the cylinder cavity to separate from the inner wall of the movable half cylinder.

[0032] Compared with the existing technology, the green noise reduction and slag removal construction method of the rotary split drill bit provided by the present invention achieves efficient and environmentally friendly slag removal construction effects through the structural design of the drill barrel and the step process. Specifically, it has the following advantages:

[0033] 1) By separating the movable half-cylinder from the fixed half-cylinder, the cylinder cavity is directly opened, so that the soil in the cylinder cavity can be quickly discharged under the action of gravity. This process does not require complex mechanical auxiliary operations, thereby improving the slag discharge efficiency and the overall construction efficiency.

[0034] 2) During the slag discharge process, the swinging action of the movable half-barrel enables the rapid unloading of slag without the need for external equipment (such as excavator bumping) or emergency braking. This fundamentally avoids the noise generated by contact and collision between machines, significantly reduces noise pollution during construction, and also meets the construction site's requirements for noise reduction, reduces interference with the surrounding environment, and complies with the concept of green construction.

[0035] 3) The drill barrel structure consists of a fixed half barrel and a movable half barrel, which has a simple structure and is easy to operate. The swing connection of the movable half barrel allows the drill barrel to flexibly switch states during drilling and slag discharge, thereby improving equipment reliability and reducing equipment costs.

[0036] 4) The drill barrel structure, consisting of a fixed half-barrel and a movable half-barrel, can adapt to a variety of complex geological conditions, including clay layers, broken rock, and strongly weathered rock. Regardless of the geological conditions, it can efficiently discharge debris and ensure smooth construction. This wide applicability enables the present invention to play a role in more types of construction scenarios and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic flow chart of the green noise reduction and slag removal construction method for a rotary split-body drill provided by the present invention;

[0038] Figure 2 It is a left side schematic diagram of the drill barrel in a closed state provided by the present invention;

[0039] Figure 3 It is a schematic diagram of the main cross-section of the drill pipe provided by the present invention;

[0040] Figure 4 This is a simplified schematic diagram of the longitudinal elastic strip provided by the present invention;

[0041] Figure 5 This is a simplified schematic diagram of the transverse elastic strip provided by the present invention;

[0042] Figure 6 is a schematic cross-sectional view of the longitudinal cavity provided by the present invention;

[0043] Figure 7 is a schematic cross-sectional view of the transverse cavity provided by the present invention;

[0044] In the figure: top head 100, fixed half cylinder 101, movable half cylinder 102, cylinder cavity 103, drill teeth 104;

[0045] Main pressure rod 200, auxiliary pressure rod 201, top block 202, main spring 203, transverse portion 204, auxiliary spring 205, top plate 206, slot 207;

[0046] Longitudinal elastic strip 300 , longitudinal cavity 301 , longitudinal strip 302 , transverse elastic strip 303 , transverse cavity 304 , free strip 305 . DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0049] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0050] Reference Figure 1-7 The figure shows a preferred embodiment of the present invention.

[0051] The green noise reduction and slag removal construction method of the rotary split drill bit includes the following construction steps:

[0052] 1) Drilling at the construction site using a drill pipe, which includes a top head 100, a fixed half-cylinder 101, and a movable half-cylinder 102. The fixed half-cylinder 101 is fixedly connected to the top head 100, and the movable half-cylinder 102 is swingably connected to the top head 100. The movable half-cylinder 102 is arranged opposite to the fixed half-cylinder 101.

[0053] During the drilling process, the drill barrel is in an enclosed state, with the movable half-barrel 102 and the fixed half-barrel 101 fixedly arranged facing each other. The movable half-barrel 102 and the fixed half-barrel 101 are enclosed together to form a barrel cavity 103 with a bottom opening. Soil enters the barrel cavity 103 through the bottom opening, and a pile hole is formed at the construction site. The bottom of the fixed half-barrel 101 and the bottom of the movable half-barrel 102 are respectively provided with a plurality of drill teeth 104. The plurality of drill teeth 104 are formed in the bottom opening and are arranged to extend radially along the bottom opening.

[0054] 2) Lift the drill pipe out of the pile hole;

[0055] 3) Swing the movable half-cylinder 102 away from the fixed half-cylinder 101. The movable half-cylinder 102 is separated from the fixed half-cylinder 101. The cylinder cavity 103 is opened, the bottom opening is opened, the drill tube is in the open state, and the soil in the cylinder cavity 103 is discharged to the construction site to form slag;

[0056] 4) Swing the movable half cylinder 102 relative to the fixed half cylinder 101 until the drill tube is in a closed state;

[0057] 5) Clean up the debris at the construction site.

[0058] The green noise reduction and slag removal construction method for the rotary split drill bit provided above achieves efficient and environmentally friendly slag removal construction effects through the structural design of the drill barrel and the operation process. Specifically, it has the following advantages:

[0059] 1) By separating the movable half-cylinder 102 from the fixed half-cylinder 101, the cylinder cavity 103 is directly opened, so that the soil in the cylinder cavity 103 can be quickly discharged under the action of gravity. This process does not require complex mechanical auxiliary operations, thereby improving the slag discharge efficiency and the overall construction efficiency.

[0060] 2) During the slag discharge process, the swinging action of the movable half-cylinder 102 enables the rapid unloading of the slag without the need for external equipment (such as excavator collision) or emergency braking. This fundamentally avoids the noise generated by contact and collision between machines, significantly reduces noise pollution during the construction process, and also meets the construction site's requirements for noise reduction, reduces interference with the surrounding environment, and complies with the concept of green construction.

[0061] 3) A drill barrel structure consisting of a fixed half barrel 101 and a movable half barrel 102 is adopted. Its structure is simple and easy to operate. The swing connection mode of the movable half barrel 102 allows the drill barrel to flexibly switch states during drilling and slag discharge, thereby improving the reliability of the equipment and reducing the equipment cost.

[0062] 4) The drill barrel structure consisting of a fixed half-barrel 101 and a movable half-barrel 102 can adapt to a variety of complex geological conditions, including clay layers, broken rocks, and strongly weathered rocks. Regardless of the geological conditions, it can efficiently discharge debris and ensure smooth construction. This wide applicability enables the present invention to play a role in more types of construction scenarios and has high practical value.

[0063] In this embodiment, in construction step 1), the top head 100 is connected to the drill rod of the rotary drilling rig, and the drill rod rotates to drive the drill barrel to drill in the construction site; in construction step 2), when the drill barrel has drilled 70% to 80% of its height in the construction site, the drill barrel is lifted out of the pile hole.

[0064] This connection method ensures the stability of the drill barrel during drilling and the reliability of power transmission. At the same time, slag discharge is carried out when the drilling depth of the drill barrel is 70% to 80% of the drill barrel height. This optimized drilling depth control strategy can effectively avoid excessive accumulation of slag in the drill barrel and reduce the resistance during slag discharge, thereby improving slag discharge efficiency and shortening the construction period.

[0065] In this embodiment, in construction step 1), the top head 100 has a top hole with a top opening. After the drill rod is inserted into the top hole, a pin is penetrated in the top head 100, and the pin passes through the drill rod synchronously to relatively and fixedly connect the drill rod and the top head 100.

[0066] By setting a top hole in the top head 100 and using a pin to fix the drill rod to the top head 100, not only is the structure simple, but the connection is also firm and reliable, which can effectively prevent the drill rod from loosening or shifting during the drilling process, ensuring the stability and safety of the drilling process. In addition, this connection method is easy to install and disassemble, improves construction efficiency, and reduces equipment maintenance costs.

[0067] In this embodiment, a locking structure is provided between the top of the fixed half-cylinder 101 and the top of the movable half-cylinder 102, and a buckle structure is provided between the bottom of the fixed half-cylinder 101 and the bottom of the movable half-cylinder 102. When the locking structure is in a locked state, the buckle structure is in a connected state, and the buckle structure restricts the movable half-cylinder 102 from swinging away from the fixed half-cylinder 101.

[0068] In construction step 1), when the drill barrel is in the enclosed state during drilling, the locking structure is in the locked state and the snap-fit ​​structure is in the connected state; in construction step 3), before the movable half-cylinder 102 is swung away from the fixed half-cylinder 101, the locking structure is unlocked so that the locking structure is in the unlocked state and the snap-fit ​​structure is in the disengaged state.

[0069] The synergistic effect of the locking structure and the buckle structure ensures that the drill barrel maintains a stable enclosed state during the drilling process, preventing the movable half barrel 102 from swinging unexpectedly, thereby ensuring drilling efficiency and construction quality;

[0070] When discharging slag, the locking structure is unlocked to disengage the snap structure, and the movable half-cylinder 102 can be smoothly swung open to achieve rapid slag discharge, which not only improves the slag discharge efficiency but also reduces the noise caused by mechanical collision, thereby achieving green noise reduction construction.

[0071] In this embodiment, the locking structure includes a main pressure rod 200 that moves longitudinally and a secondary pressure rod 201 that moves longitudinally. The main pressure rod 200 is connected to a linkage structure, and the linkage structure is connected to a swinging top block 202.

[0072] In construction step 3), the main pressure rod 200 is moved downward, and the main pressure rod 200 drives the top block 202 to swing through the linkage structure. The top block 202 is separated from the support restriction of the secondary pressure rod 201, and the secondary pressure rod 201 moves downward, driving the movable half cylinder 102 to move downward. After the snap structure is in the disengaged state, the movable half cylinder 102 is swung away from the fixed half cylinder 101 to open the drill barrel.

[0073] The linkage mechanism of the main pressure rod 200 and the auxiliary pressure rod 201 is utilized to realize the rapid switching between locking and unlocking through a simple mechanical structure; the downward movement of the main pressure rod 200 drives the top block 202 to swing, thereby releasing the restriction on the auxiliary pressure rod 201, so that the auxiliary pressure rod 201 can move downward smoothly and drive the movable half cylinder 102 to open. This not only simplifies the operation process and improves construction efficiency, but also reduces the risk of equipment failure caused by complex operations, and further improves the reliability and stability of the equipment.

[0074] In this embodiment, the upper portion of the main pressure rod 200 extends above the fixed half-cylinder 101, forming a main upper section. The main upper section is connected to a main spring 203 that drives the main pressure rod 200 to return upward. The lower portion of the main pressure rod 200 forms a main lower section, and a linkage structure is connected to the main lower section. The auxiliary pressure rod 201 is provided with a transverse portion 204.

[0075] In construction step 1), while the drill barrel is drilling in the construction site, the drill barrel is in an enclosed state, the top block 202 supports the transverse portion 204 from bottom to top, restricting the secondary pressure rod 201 from moving downward, the locking structure is in a locked state, and the snap structure is in a connected state;

[0076] In construction step 3), after the drill tube is pulled out of the pile hole, the main pressure rod 200 moves downward, the linkage structure drives the top block 202 to swing, the top block 202 disengages from the support of the transverse part 204, the locked state is in the unlocked state, the secondary pressure rod 201 moves downward, driving the movable half cylinder 102 to move downward, so that the snap structure is in a disengaged state.

[0077] The main pressure rod 200 and the auxiliary pressure rod 201 are automatically reset by the elastic action of the main spring 203 and the auxiliary spring 205;

[0078] During the drilling process, the main pressure rod 200 and the auxiliary pressure rod 201 remain locked to ensure the stability of the drill barrel; when discharging slag, the main pressure rod 200 moves down to release the lock, and the auxiliary pressure rod 201 moves down to drive the movable half-barrel 102 to open, thereby improving the convenience of operation, reducing manual intervention and improving construction efficiency.

[0079] In this embodiment, the secondary pressure rod 201 extends above the movable half-cylinder 102 to form a secondary upper section. The secondary upper section is connected to a secondary spring 205 that drives the secondary pressure rod 201 to return upward. The lower part of the secondary pressure rod 201 forms a secondary lower section. The top of the movable half-cylinder 102 has a top plate 206.

[0080] In construction step 3), when the locking structure is in the unlocked state, the secondary pressure rod 201 moves downward, and the secondary lower section presses downward against the top plate 206, driving the movable half cylinder 102 to move downward, so that the buckle structure is in the disengaged state.

[0081] In this way, the auxiliary pressure rod 201 is automatically reset by the elastic action of the auxiliary spring 205, which not only simplifies the operation process, but also reduces the risk of equipment failure caused by complex operations, and further improves the reliability and stability of the equipment.

[0082] In this embodiment, the buckle structure includes a bent hook and a slot 207 formed at the bottom of the fixed half-cylinder 101. One end of the hook is connected to the bottom of the movable half-cylinder 102, and the other end of the buckle is bent upward.

[0083] In construction step 1), when the buckle structure is in the connected state, the hook is inserted into the slot 207 from bottom to top; in construction step 3), when the buckle structure is in the disengaged state, the buckle is disengaged from the slot 207 from top to bottom.

[0084] The cooperation between the hook and the slot 207 realizes the stable connection and quick separation of the movable half-cylinder 102 and the fixed half-cylinder 101;

[0085] During the drilling process, the hook is inserted into the slot 207 to ensure that the enclosed state of the drill barrel is stable; when discharging slag, the hook is disengaged from the slot 207, and the movable half-barrel 102 can be opened smoothly, which not only improves the stability and reliability of the drill barrel, but also simplifies the operation process and improves construction efficiency.

[0086] In this embodiment, the inner sidewall of the fixed half-cylinder 101 is provided with a plurality of longitudinal elastic strips 300. The longitudinal elastic strips 300 are arranged in a curved manner, and the ends of the longitudinal elastic strips 300 are butted against the inner sidewall of the fixed half-cylinder 101. The longitudinal elastic strips 300 and the inner sidewall of the fixed half-cylinder 101 enclose a longitudinal cavity 301.

[0087] A rigid longitudinal strip 302 is provided in the longitudinal cavity 301. The longitudinal strip 302 is fixedly connected to the middle portion of the longitudinal elastic strip 300 and has a longitudinal gap with the inner side wall of the fixed half-cylinder 101.

[0088] In construction step 1), after the soil enters the barrel cavity 103, the longitudinal elastic strip 300 is squeezed and deformed laterally until the longitudinal strip 302 abuts against the inner wall of the fixed half-cylinder 101, and the longitudinal elastic strip 300 is in compression deformation; in construction step 3), when the drill barrel is in the open state, the longitudinal elastic strip 300 elastically returns to its original shape outward, driving the soil in the barrel cavity 103 to break away from the inner wall of the fixed half-cylinder 101.

[0089] During the drilling process, the soil enters the cylinder cavity 103 and squeezes the longitudinal elastic strip 300, causing it to be compressed and deformed; when discharging slag, the longitudinal elastic strip 300 elastically resets, pushing the soil away from the inner wall of the fixed half cylinder 101, thereby reducing the residual soil in the cylinder cavity 103 and improving the slag discharge efficiency. At the same time, it also reduces the equipment wear caused by the residual soil and extends the service life of the equipment.

[0090] In this embodiment, the inner sidewall of the movable half-cylinder 102 is provided with a plurality of transversely arranged transverse elastic strips 303. The transverse elastic strips 303 are arranged in a curved manner along the circumference of the movable half-cylinder 102. The transverse elastic strips 303 are hollow inside, forming a transversely curved transverse cavity 304. A free strip 305 is provided in the transverse cavity 304, which is free and has a smaller diameter than the transverse cavity 304.

[0091] In construction step 1), after the soil enters the barrel cavity 103, it squeezes the transverse elastic strip 303 and deforms it longitudinally until the free strip 305 is pressed by the transverse elastic strip 303 and is in a relatively fixed state, and the transverse elastic strip 303 is in a compressed deformation; in construction step 3), when the drill barrel is in the open state, the transverse elastic strip 303 elastically returns to its original position and deforms outward, driving the soil in the barrel cavity 103 to separate from the inner wall of the movable half-cylinder 102.

[0092] During the drilling process, the soil enters the cylinder cavity 103 and squeezes the transverse elastic strip 303, causing it to deform longitudinally, and the free strip 305 is pressed in the transverse cavity 304 in a relatively fixed state; when discharging slag, the transverse elastic strip 303 elastically resets, pushing the soil away from the inner wall of the movable half cylinder 102, thereby reducing the residual soil in the cylinder cavity 103 and improving the slag discharge efficiency. At the same time, it also reduces the equipment wear caused by the residual soil and extends the service life of the equipment.

[0093] Hereinafter, the technical solutions in the embodiments of the present invention will be described in detail, clearly and completely in combination with the embodiments of the present invention, so that the contents of the green noise reduction and slag removal construction method of the rotary split drill bit are easier to understand.

[0094] 1. Key technologies:

[0095] 1) The split-body rotary drill bit consists of two parts: the top head and the drill barrel, and the whole adopts a steel structure design;

[0096] The top head consists of a top hole and primary and secondary pressure rods. The top hole is used to connect the drill rod of the rotary drilling rig. After inserting the drill rod head into the top hole, the two are connected by inserting the pin and the safety pin. The main pressure rod is connected to the locking structure of the drill barrel. Pressing down can unlock the locking structure, and resetting it can lock the locking structure. The secondary pressure rod is connected to the top plate of the movable half of the drill barrel. When the main pressure rod unlocks the locking structure, pressing down the secondary pressure rod will move the movable half downward, disengaging the lock on the lower part of the drill barrel. Then, the movable half is opened to unload the debris.

[0097] The drill barrel consists of a fixed half and a movable half, with a built-in locking mechanism. The movable half has a hook at the bottom, while the fixed half has a slot. Inserting the hook into the slot secures the drill bit. The bottom of the barrel is tapered, and the drill teeth are arranged obliquely and symmetrically, extending inward to cover the barrel diameter, facilitating full-section drilling and soil extraction.

[0098] The fixed half-drill consists of a fixed barrel and a fixed locking structure. The fixed barrel is a semicircular open-end drill barrel with a built-in locking structure on the upper part, including a top block, a pull rod, and a pressure rod connected to the main pressure rod. The upper part of the fixed barrel is fixedly connected to the top head, and the fixed half-drill remains relatively fixed during soil unloading. The lower part of the fixed barrel is provided with a slot for locking the hook of the movable half-drill. Drill teeth are set at the bottom of the barrel, and the drill teeth are arranged in an obliquely symmetrical manner.

[0099] Among them, the movable half-cylinder consists of a movable cylinder body and a movable locking structural component. The movable cylinder body is also a semicircular open drill cylinder, symmetrical with the fixed half-cylinder, and has a built-in locking structural component that works together with the fixed half-cylinder, including a transverse part, a sliding shaft, a movable groove, a top plate, etc. The movable cylinder body adopts a "movable" connection and is not fixed to the top head; the top plate inside the cylinder body is connected to the upper auxiliary pressure rod. When the auxiliary pressure rod is pressed down, it acts on the top plate, and the movable cylinder body moves downward and opens relative to the top head.

[0100] A hook is provided at the lower part of the movable cylinder body, which extends into the slot at the lower part of the fixed half cylinder, combining the movable half cylinder and the fixed half cylinder into a drill cylinder; the bottom is also provided with drill teeth arranged obliquely and symmetrically.

[0101] 2) The opening and closing of the drill bit is controlled by the main pressure rod, the auxiliary pressure rod and the locking structure inside the drill barrel. By pressing down the main pressure rod to unlock the internal brake of the drill barrel, and then continuing to press down the auxiliary pressure rod, the hook of the movable half barrel is unfastened and separated from the slot of the fixed half barrel, thereby opening the split drill bit;

[0102] Among them, the main pressure rod of the drill bit is connected to the pressure rod of the fixed half-cylinder locking structure. By applying downward pressure to the main pressure rod, the main pressure rod moves downward to drive the pull rod to move downward, and the pull rod pulls the top block to rotate, thereby separating from the horizontal part and completing the unlocking of the inside of the drill bit; after unlocking, the horizontal part and the movable half-cylinder can both move downward.

[0103] After the split-body drill head locking mechanism is unlocked, the auxiliary pressure rod continues to be pressed downward; the auxiliary pressure rod acts on the top plate of the movable half-cylinder, causing the movable half-cylinder to move downward as a whole, and the hook set at the bottom of the movable half-cylinder disengages from the slot of the fixed half-cylinder, completing the unlocking of the drill barrel and separating the closed drill barrels. The length of the movable slot controls the movable distance of the movable half-cylinder. When the sliding shaft moves out of the bottom of the movable slot, the movable half-cylinder stops moving downward, ensuring that the movable half-cylinder does not fall off.

[0104] When the drill bit is unlocked and opened, the debris is automatically discharged under the action of its own weight. If the debris is too viscous and sticks to the wall of the drill barrel and cannot be discharged automatically, control the drill bit to make the drill teeth of the movable half barrel hang on the ground, move the drill barrel to completely open the movable half barrel, and all the remaining drilling debris will be discharged;

[0105] After all the drill cuttings in the drill barrel are unloaded, move the drill bit to reset and close the movable half barrel; after the drill barrel is retracted and closed, control the drill bit to press vertically downward, and reset and lock the barrel hook and slot, the horizontal part of the locking structure and the top block; after completing the reset of the drill bit, lift the drill bit to continue the next drilling.

[0106] Second, operation points:

[0107] 1) Use an excavator to level the site and remove above-ground and underground obstacles.

[0108] 2) Measure and lay out the pile positions according to the coordinate control points, draw a cross line from the center point to set up 4 guard piles, and mark them.

[0109] 3) Install the split drill barrel on the rotary drilling rig and start drilling after it is in place.

[0110] 4) When drilling, use light pressure and slow rotation, and control the verticality of the drill hole to meet the requirements.

[0111] 5) When drilling, control the depth of each drill to prevent the debris in the drill barrel from being too dense.

[0112] 6) When the drilling footage reaches 80% of the effective drilling footage of the drill tube, the drill tube will be lifted out of the hole.

[0113] 7) After the drill bit is lifted out of the outlet, operate the drill pipe hydraulic disc to press down the main and auxiliary pressure rods.

[0114] 8) The locking structure in the drill barrel is unlocked under the traction of the pressure rod, the movable half barrel moves downward, the hook and groove of the drill barrel are separated, and the movable half barrel and the fixed half barrel are released.

[0115] 9) After the drill bit is unlocked and the half-cylinder is unfastened, move the drill bit down until the drill teeth fall to the bottom of the movable half-cylinder; operate the drill rod to slowly move the drill bit. At this time, the drill cuttings are discharged under the action of their own weight, and the movable half-cylinder is opened outward.

[0116] 10) After the drill bit is opened, slowly rotate and lift the drill bit. The drill cuttings inside the drill barrel will fall from the inner wall of the drill bit and will be automatically discharged from the drill bit opening.

[0117] 11) After the debris in the drill bit is completely discharged, lift the drill bit. The movable half cylinder of the drill bit will naturally move together under the action of gravity. When the drill bit is lifted, the hook and the groove will be disengaged.

[0118] 12) After the drill bits are combined, control the drill bits to be pressed vertically toward the ground. The downward pressure of the drill bits drives the movable half-cylinder to move upward, and the hook and groove of the drill barrel, the horizontal part of the locking structure and the top block are reset and locked, thereby completing the closing and resetting of the drill barrel.

[0119] 13) After the drill tube is deslagging, lift the drill bit and move it into the pile hole to continue drilling.

[0120] 14) The accumulated debris shall be cleaned up promptly by excavators on site and transported to the dumping site in a centralized manner.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A green noise reduction and slag removal construction method for a split-body rotary drilling bit, characterized in that: The construction steps include: 1) Drilling at the construction site using a drill pipe, the drill pipe comprising a top head, a fixed half-pipe and a movable half-pipe, the fixed half-pipe being fixedly connected to the top head, the movable half-pipe being swingably connected to the top head, and the movable half-pipe being arranged facing the fixed half-pipe; During the drilling process, the drill barrel is in an enclosed state, with the movable half barrel and the fixed half barrel fixedly arranged facing each other. The movable half barrel and the fixed half barrel are enclosed together to form a barrel cavity with a bottom opening. Soil enters the barrel cavity through the bottom opening, and a pile hole is formed on the construction site. A plurality of drill teeth are respectively provided at the bottom of the fixed half barrel and the bottom of the movable half barrel. The plurality of drill teeth are formed at the bottom opening and are arranged along the radial direction of the bottom opening. 2) lifting the drill pipe out of the pile hole; 3) The movable half-cylinder is swung away from the fixed half-cylinder. The movable half-cylinder is separated from the fixed half-cylinder, the cylinder cavity is opened, the bottom opening is opened, the drill cylinder is in an open state, and the soil in the cylinder cavity is discharged onto the construction site to form slag; 4) Swing the movable half cylinder relative to the fixed half cylinder until the drill tube is in a closed state; 5) Clean up the debris at the construction site.

2. The green noise reduction and slag removal construction method of the rotary split drill bit according to claim 1 is characterized in that: In the construction step 1), the top head is connected to the drill rod of the rotary drilling rig, and the drill rod rotates to drive the drill barrel to drill in the construction site; in the construction step 2), when the drill barrel has drilled 70% to 80% of its height in the construction site, the drill barrel is lifted out of the pile hole.

3. The green noise reduction and slag removal construction method of the rotary split drill bit according to claim 2 is characterized in that: In the construction step 1), the top head has a top hole with a top opening. After the drill rod is inserted into the top hole, a pin is inserted into the top head. The pin passes through the drill rod synchronously to relatively fix the drill rod and the top head.

4. The green noise reduction and slag removal construction method of a rotary split drill bit according to any one of claims 1 to 3, characterized in that: A locking structure is provided between the top of the fixed half-cylinder and the top of the movable half-cylinder, and a buckle structure is provided between the bottom of the fixed half-cylinder and the bottom of the movable half-cylinder. When the locking structure is in a locked state, the buckle structure is in a connected state, and the buckle structure restricts the movable half-cylinder from swinging away from the fixed half-cylinder. In the construction step 1), when the drill barrel is in the enclosed state during drilling, the locking structure is in the locked state and the snap-fit ​​structure is in the connected state; in the construction step 3), before the movable half-cylinder is swung away from the fixed half-cylinder, the locking structure is unlocked so that the locking structure is in the unlocked state and the snap-fit ​​structure is in the disengaged state.

5. The green noise reduction and slag removal construction method of the rotary split drill bit according to claim 4 is characterized in that: The locking structure includes a main pressure rod that moves longitudinally and a secondary pressure rod that moves longitudinally, the main pressure rod is connected to a linkage structure, and the linkage structure is connected to a swinging top block; In the construction step 3), the main pressure rod is moved downward, and the main pressure rod drives the top block to swing through the linkage structure. The top block is separated from the support restriction of the auxiliary pressure rod, and the auxiliary pressure rod moves downward, driving the movable half-cylinder to move downward. After the snap structure is in the disengaged state, the movable half-cylinder is swung away from the fixed half-cylinder to open the drill barrel.

6. The green noise reduction and slag removal construction method of the rotary split drill bit according to claim 5, characterized in that: The upper portion of the main pressure rod extends above the fixed half-cylinder to form a main upper section, and the main upper section is connected to a main spring that drives the main pressure rod to return upward; the lower portion of the main pressure rod forms a main lower section, and the linkage structure is connected to the main lower section; the auxiliary pressure rod is provided with a transverse portion; In the construction step 1), during the drilling process of the drill tube in the construction site, the drill tube is in an enclosed state, the top block supports the transverse portion from bottom to top, restricting the auxiliary pressure rod from moving downward, the locking structure is in a locked state, and the buckle structure is in a connected state; In the construction step 3), after the drill tube is pulled out of the pile hole, the main pressure rod moves downward, the linkage structure drives the top block to swing, the top block is separated from the support of the horizontal part, the locked state is in the unlocked state, the secondary pressure rod moves downward, driving the movable half cylinder to move downward, so that the snap structure is in a disengaged state.

7. The green noise reduction and slag removal construction method of a split-body rotary drilling bit according to claim 5, characterized in that: The auxiliary pressure rod extends above the movable half-cylinder to form an auxiliary upper section. The auxiliary upper section is connected to an auxiliary spring that drives the auxiliary pressure rod to return upward. The lower part of the auxiliary pressure rod forms a auxiliary lower section. The top of the movable half-cylinder has a top plate. In the construction step 3), when the locking structure is in the unlocked state, the auxiliary pressure rod moves downward, and the auxiliary lower section presses the top plate downward, driving the movable half cylinder to move downward, so that the snap structure is in the disengaged state.

8. The green noise reduction and slag removal construction method of a split-body rotary drilling bit according to claim 4 is characterized in that: The buckle structure includes a bent hook and a slot formed at the bottom of the fixed half-cylinder, one end of the hook is connected to the bottom of the movable half-cylinder, and the other end of the buckle is bent upward; In the construction step 1), when the buckle structure is in the connected state, the hook is inserted into the slot from bottom to top; In the construction step 3), when the buckle structure is in a disengaged state, the buckle disengages from the slot from top to bottom.

9. The green noise reduction and slag removal construction method for a split-body rotary drilling bit according to any one of claims 1 to 3, characterized in that: The inner side wall of the fixed half-cylinder is provided with a plurality of longitudinal elastic strips, the longitudinal elastic strips are arranged in a curved manner, and the ends of the longitudinal elastic strips are butted against the inner side wall of the fixed half-cylinder, and the longitudinal elastic strips and the inner side wall of the fixed half-cylinder enclose a longitudinal cavity arranged in a longitudinal direction; A hard longitudinal strip is provided in the longitudinal cavity, the longitudinal strip is fixedly connected to the middle portion of the longitudinal elastic strip, and has a longitudinal gap with the inner side wall of the fixed half-cylinder; In the construction step 1), after the soil enters the cylinder cavity, it squeezes the longitudinal elastic strip and deforms it laterally until the longitudinal strip abuts against the inner wall of the fixed half cylinder, and the longitudinal elastic strip is in compression deformation; in the construction step 3), when the drill barrel is in the open state, the longitudinal elastic strip elastically resets and deforms outward, driving the soil in the cylinder cavity to break away from the inner wall of the fixed half cylinder.

10. The green noise reduction and slag removal construction method for a split-body rotary drilling bit according to any one of claims 1 to 3, characterized in that: The inner side wall of the movable half-cylinder is provided with a plurality of transverse elastic strips, the transverse elastic strips being arranged in a curved manner along the circumference of the movable half-cylinder, the interior of the transverse elastic strips being arranged hollow, forming a transverse cavity arranged in a transverse curvature; a free strip is provided in the transverse cavity with a counterweight and is freely arranged in the transverse cavity, the diameter of the free strip being smaller than the diameter of the transverse cavity; In the construction step 1), after the soil enters the cylinder cavity, it squeezes the transverse elastic strip and deforms it longitudinally until the free strip is pressed by the transverse elastic strip and is in a relatively fixed state, and the transverse elastic strip is in a compressed deformation; in the construction step 3), when the drill barrel is in an open state, the transverse elastic strip elastically resets and deforms outward, driving the soil in the cylinder cavity to separate from the inner wall of the movable half cylinder.

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