Environment-friendly noise reduction and slag discharge structure of 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 green noise reduction and slag discharge structure which comprises a drill barrel and a top head, and the drill barrel comprises a fixed half barrel and a movable half barrel; when the movable half cylinder and the fixed half cylinder are connected into a whole, a cylinder cavity with an opening in the bottom and containing a soil body is formed, and the drilling cylinder is in an enclosed state; when the movable half cylinder is separated from the fixed half cylinder, the drill cylinder is in an open state; a buckle structure is arranged between the movable half cylinder and the fixed half cylinder, after the movable half cylinder moves upwards relative to the fixed half cylinder, the buckle structure is in a connected state, the movable half cylinder and the fixed half cylinder are relatively fixed, and the drill cylinder is in an enclosed state; when the movable half cylinder moves downwards relative to the fixed half cylinder, the buckle structure is in a disengaged state; by arranging the openable and closable drilling barrel, the deslagging convenience of the drill bit in the rotary excavating and drilling process is improved, meanwhile, the advantages of deslagging efficiency, noise control and the like are considered, and a more efficient and environment-friendly solution is provided for rotary excavating and drilling construction.

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 structure of a rotary split drill bit. Background Art

[0002] Rotary drilling construction is an efficient drilling technology widely used in building pile foundation projects, bridge pile foundation projects and deep foundation pit support projects. Its principle is to use the drill bit of the rotary drilling rig to rotate and cut the soil layer, and then load the cut soil into the drill barrel, and then lift the drill barrel to the ground for slag removal.

[0003] In the prior art, due to the high viscosity and density of the clay layer, the crushed rock and strongly weathered rock will produce a large number of fragments, which makes the slag inside the drill barrel easily compacted, making it difficult to discharge the slag. When lifting the drill and unloading the slag with a traditional drill barrel, multiple operations are often required to discharge the slag.

[0004] To solve the problem of difficult slag removal, the existing technology usually adopts repeated rotation of the drill bucket or sudden braking measures to shake out the rock slag in the drill barrel, and even requires manual use combined with excavators to knock out the slag. These methods are not only complicated to operate, but also prone to mechanical damage and safety accidents.

[0005] In addition, during the slag discharge process, the contact and collision between machines will generate a lot of noise. This noise pollution will cause great trouble to the lives of surrounding residents and become the main source of pollution complaints in rotary drilling pile construction. In serious cases, the construction party may face penalties or even be ordered to suspend work and rectify the situation. Summary of the Invention

[0006] The purpose of the present invention is to provide a green noise reduction and slag discharge structure for a rotary drilling split-body drill bit, aiming to solve the problem in the prior art that the drill bit slag discharge is not convenient enough during the rotary drilling process.

[0007] The present invention is achieved by providing a green noise reduction and slag removal structure for a split-body rotary drilling bit, comprising a drill barrel and a top head arranged above the drill barrel and connected to a drill rod, wherein the drill barrel comprises a fixed half-barrel fixedly connected to the top head and a movable half-barrel swingably connected to the top head, wherein the fixed half-barrel and the movable half-barrel are arranged facing each other;

[0008] When the movable half-cylinder and the fixed half-cylinder are fixedly connected toward each other as a whole, the movable half-cylinder and the fixed half-cylinder enclose a cylinder cavity with an open bottom and accommodating soil, and the drill barrel is in an enclosed state; when the movable half-cylinder swings away from the fixed half-cylinder, the movable half-cylinder separates from the fixed half-cylinder, the cylinder cavity is opened, and the drill barrel is in an open state;

[0009] A buckle structure is provided between the movable half-cylinder and the fixed half-cylinder. When the movable half-cylinder moves upward relative to the fixed half-cylinder, the buckle structure is in a connected state, the movable half-cylinder and the fixed half-cylinder are relatively fixed, and the drill tube is in an enclosed state.

[0010] When the movable half-cylinder moves downward relative to the fixed half-cylinder and the buckle structure is in a disengaged state, the movable half-cylinder is movably arranged relative to the fixed half-cylinder.

[0011] Furthermore, the top head has a top hole with a top opening, a 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 and fixedly connect the drill rod and the top head.

[0012] Furthermore, the top hole is a square hole, and a plurality of pins are passed through the top head, and the plurality of pins are arranged at intervals along the height direction of the top head.

[0013] Furthermore, a locking structure is provided between the top of the fixed half-cylinder and the top of the movable half-cylinder. When the locking structure is in a locked state, the locking structure restricts the movable half-cylinder from moving downward relative to the fixed half-cylinder. The movable half-cylinder and the fixed half-cylinder are relatively fixed, and the snap structure is in a connected state.

[0014] When the locking structure is in the unlocked state, the locking structure is free from the restriction on the downward movement of the movable half-cylinder relative to the fixed half-cylinder.

[0015] 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;

[0016] When the movable half-cylinder moves upward relative to the fixed half-cylinder and the hook is inserted into the slot from bottom to top, the buckle structure is in a connected state; when the movable half-cylinder moves downward relative to the fixed half-cylinder and the hook is disengaged from the slot from top to bottom, the buckle structure is in a disengaged state.

[0017] 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, the linkage structure is connected to a top block that is swingably arranged and limits the downward movement of the secondary pressure rod, when the secondary pressure rod moves downward, the secondary pressure rod drives the movable half cylinder to move downward relative to the fixed half cylinder;

[0018] When the main pressure rod moves downward, the linkage structure drives the top block to swing, so that the top block is separated from the bottom-up support of the secondary pressure rod, and the locking structure is in an unlocked state; when the locking structure is in the unlocked state, the secondary pressure rod moves downward, driving the movable half-cylinder to move downward relative to the fixed half-cylinder, the hook disengages from the slot from top to bottom, and the buckle structure is in a disengaged state.

[0019] Furthermore, the linkage structure includes a pull rod, one end of which is hinged to the main pressure rod, and the other end of which is hinged to the top block; a hinge seat is provided on the fixed half cylinder, the top block is eccentrically hinged to the hinge seat, and the hinge seat is arranged away from the center of the top block.

[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;

[0021] 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.

[0022] The secondary pressure rod is provided with a transverse portion abutting against the top block. When the locking structure is in a locked state, the top block supports the transverse portion from bottom to top, limiting the downward movement of the secondary pressure rod. When the top block is disengaged from the support for the transverse portion, the locking structure is in an unlocked state, the secondary pressure rod moves downward, driving the movable half-cylinder to move downward relative to the fixed half-cylinder, and the snap structure is in a disengaged state.

[0023] 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;

[0024] 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;

[0025] When the drill tube is in the enclosed state and the tube cavity is filled with soil, the soil squeezes the longitudinal elastic strip to deform laterally until the longitudinal strip abuts against the inner wall of the fixed half tube, and the longitudinal elastic strip is in compression deformation;

[0026] When the drill tube is in an open state, the longitudinal elastic strip is elastically reset and deformed outwards, driving the soil in the tube cavity to separate from the inner side wall of the fixed half tube.

[0027] 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;

[0028] When the drill barrel is in a closed state and the barrel cavity is filled with soil, the soil squeezes the transverse elastic strip to deform 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; when the drill barrel is in an open state, the transverse elastic strip elastically resets and deforms outward, driving the soil in the barrel cavity to separate from the inner wall of the movable half barrel.

[0029] Compared with the prior art, the green noise reduction and slag discharge structure of the rotary split drill bit provided by the present invention has the following technical advantages:

[0030] 1) The movable and fixed halves are fixedly connected toward and swing away from each other, enabling the drill barrel to quickly switch between a closed and open state. This allows the drill bit to efficiently contain soil during drilling, while allowing the barrel cavity to be quickly opened and the soil discharged during slag removal. This reduces the complexity of slag removal operations and eliminates the need for cumbersome measures such as repeated rotation of the drill bucket or emergency braking, significantly improving the convenience of slag removal.

[0031] 2) The snap-fit ​​structure between the movable and fixed half-barrels allows the drill barrel to securely hold the soil when in the closed position. When slag removal is required, the snap-fit ​​structure can be quickly disengaged, allowing the movable half-barrel to open quickly for rapid slag removal. This not only reduces slag removal time but also improves overall construction efficiency. This is especially true in strata such as clay layers, fractured rock, and strongly weathered rock, effectively avoiding the difficulty in slag removal caused by dense slag inside the drill barrel.

[0032] 3) Since the opening and closing of the drill barrel is simple and quick, the contact and collision between machines are reduced, thereby effectively reducing the noise generated during the slag discharge process. This not only meets environmental protection requirements and green construction concepts, but also reduces noise pollution to the surrounding environment, thereby avoiding construction complaints and penalties caused by excessive noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of a front view and section of a green noise reduction and slag discharge structure of a split-body rotary drill bit provided by the present invention;

[0034] Figure 2 It is a left side schematic diagram of the drill barrel in a closed state provided by the present invention;

[0035] Figure 3 This is a simplified schematic diagram of the longitudinal elastic strip provided by the present invention;

[0036] Figure 4 This is a simplified schematic diagram of the transverse elastic strip provided by the present invention;

[0037] Figure 5 is a schematic cross-sectional view of the longitudinal cavity provided by the present invention;

[0038] Figure 6 is a schematic cross-sectional view of the transverse cavity provided by the present invention;

[0039] In the figure: top head 100, fixed half cylinder 101, movable half cylinder 102, cylinder cavity 103, and slot 104;

[0040] Main pressure rod 200, auxiliary pressure rod 201, top block 202, pull rod 203, hinge seat 204, main spring 205, auxiliary spring 206, top plate 207, transverse part 208;

[0041] Longitudinal elastic strip 300 , longitudinal cavity 301 , longitudinal strip 302 , transverse elastic strip 303 , transverse cavity 304 , free strip 305 . DETAILED DESCRIPTION

[0042] 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.

[0043] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0044] 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.

[0045] Reference Figure 1-6 The figure shows a preferred embodiment of the present invention.

[0046] The green, noise-reducing, and slag-discharging structure of a split-body rotary drill bit includes a drill barrel and a top head 100 disposed above the drill barrel and connected to the drill rod. The drill barrel includes a fixed half-barrel 101 fixedly connected to the top head 100 and a movable half-barrel 102 swingably connected to the top head 100. The fixed half-barrel 101 and the movable half-barrel 102 are arranged facing each other.

[0047] When the movable half-cylinder 102 and the fixed half-cylinder 101 are fixedly connected toward each other, the movable half-cylinder 102 and the fixed half-cylinder 101 enclose a cylinder cavity 103 with an open bottom to accommodate the soil, and the drill tube is in an enclosed state; when the movable half-cylinder 102 swings away from the fixed half-cylinder 101, the movable half-cylinder 102 separates from the fixed half-cylinder 101, the cylinder cavity 103 is opened, and the drill tube is in an open state;

[0048] A buckle structure is provided between the movable half-cylinder 102 and the fixed half-cylinder 101. When the movable half-cylinder 102 moves upward relative to the fixed half-cylinder 101, the buckle structure is in a connected state, the movable half-cylinder 102 and the fixed half-cylinder 101 are relatively fixed, and the drill tube is in an enclosed state.

[0049] When the movable half-cylinder 102 moves downward relative to the fixed half-cylinder 101 and the buckle structure is in a disengaged state, the movable half-cylinder 102 is movably arranged relative to the fixed half-cylinder 101 .

[0050] The green noise reduction and slag discharge structure of the rotary split drill bit provided above has the following technical advantages:

[0051] 1) By means of the movable half-cylinder 102 and the fixed half-cylinder 101 being fixedly connected toward each other and swinging away from each other, the drill barrel can be quickly switched between the closed and open states. This allows the drill bit to efficiently contain soil during drilling, and the barrel cavity 103 can be quickly opened to discharge the soil during slag removal. This not only reduces the complexity of the slag removal operation, but also eliminates the need for cumbersome measures such as repeatedly rotating the drill bucket or using emergency braking, thereby significantly improving the convenience of slag removal.

[0052] 2) The snap-fit ​​structure between the movable half-cylinder 102 and the fixed half-cylinder 101 allows the drill barrel to securely hold the soil when in the enclosed state. When slag removal is required, the snap-fit ​​structure can be quickly disengaged, and the movable half-cylinder 102 quickly opens, achieving rapid slag removal. This not only reduces slag removal time but also improves overall construction efficiency. This is especially true in strata such as clay layers, fractured rock, and strongly weathered rock, effectively avoiding the difficulty in slag removal caused by dense slag inside the drill barrel.

[0053] 3) Since the opening and closing of the drill barrel is simple and quick, the contact and collision between machines are reduced, thereby effectively reducing the noise generated during the slag discharge process. This not only meets environmental protection requirements and green construction concepts, but also reduces noise pollution to the surrounding environment, thereby avoiding construction complaints and penalties caused by excessive noise.

[0054] In this embodiment, the top head 100 has a top hole with a top opening, a drill rod is inserted into the top hole, a pin is passed through 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.

[0055] This connection method can effectively transmit power and ensure that the drill rod will not undergo relative displacement during rotation and up and down movement, thereby improving the stability and reliability of the drilling process. At the same time, this structure is simple and reliable, easy to install and maintain, and reduces the maintenance cost of the equipment.

[0056] In this embodiment, the top hole is a square hole, and a plurality of pins are passed through the top head 100 . The plurality of pins are arranged at intervals along the height direction of the top head 100 .

[0057] The top hole adopts a square hole design, which can better adapt to the square drill rod, reduce the shaking of the drill rod during rotation, and improve drilling accuracy. Multiple pins are arranged at intervals along the height direction of the top head 100, which enhances the connection strength between the drill rod and the top head 100 and ensures stability under high torque and high load conditions.

[0058] 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. When the locking structure is in the locked state, the locking structure restricts the movable half-cylinder 102 from moving downward relative to the fixed half-cylinder 101. The movable half-cylinder 102 and the fixed half-cylinder 101 are relatively fixed, and the snap-fit ​​structure is in a connected state.

[0059] When the locking structure is in the unlocked state, the locking structure is free from the restriction on the downward movement of the movable half-cylinder 102 relative to the fixed half-cylinder 101 .

[0060] The coordinated action of the locking structure and the buckle structure enables the drill barrel to be reliably switched between the closed state and the open state.

[0061] In the locked state, the movable half-cylinder 102 is relatively fixed to the fixed half-cylinder 101, ensuring that the drill barrel will not be accidentally opened during the drilling process, thereby improving the safety and stability of drilling. In the unlocked state, the movable half-cylinder 102 can move freely, facilitating the rapid opening of the drill barrel for slag discharge, thereby achieving fast and convenient slag discharge.

[0062] In this embodiment, the buckle structure includes a bent hook and a slot 104 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.

[0063] When the movable half-cylinder 102 moves upward relative to the fixed half-cylinder 101 and the hook is inserted into the slot 104 from bottom to top, the buckle structure is in a connected state; when the movable half-cylinder 102 moves downward relative to the fixed half-cylinder and the hook is disengaged from the slot 104 from top to bottom, the buckle structure is in a disengaged state.

[0064] The cooperation between the hook and the slot 104 enables quick connection and disconnection between the movable half-cylinder 102 and the fixed half-cylinder 101;

[0065] In the connected state, the hook is firmly inserted into the slot 104 to ensure that the drill tube will not loosen during the drilling process; in the disengaged state, the hook can be quickly withdrawn from the slot 104, so that the movable half-tube 102 can be quickly opened to achieve rapid slag discharge, which not only improves the slag discharge efficiency, but also reduces the operation complexity, further improving the construction efficiency.

[0066] 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, which is connected to a top block 202 that is arranged in a swinging manner and limits the downward movement of the secondary pressure rod 201. When the secondary pressure rod 201 moves downward, the secondary pressure rod 201 drives the movable half-cylinder 102 to move downward relative to the fixed half-cylinder 101.

[0067] When the main pressure rod 200 moves downward, the linkage structure drives the top block 202 to swing, so that the top block 202 is separated from the bottom-up support of the secondary pressure rod 201, and the locking structure is in the unlocked state; when the locking structure is in the unlocked state, the secondary pressure rod 201 moves downward, driving the movable half-cylinder 102 to move downward relative to the fixed half-cylinder 101, and the hook is separated from the slot 104 from top to bottom, and the buckle structure is in the disengaged state.

[0068] The movement of the main pressure rod 200 drives the top block 202 to swing through the linkage structure, thereby controlling the up and down movement of the secondary pressure rod 201. This not only ensures that the movable half-cylinder 102 is firmly connected to the fixed half-cylinder 101 in the locked state, but also can quickly drive the movable half-cylinder 102 to open in the unlocked state to achieve rapid slag discharge. This complex linkage mechanism improves the degree of automation of the equipment, reduces manual intervention, and further improves construction efficiency and safety.

[0069] In this embodiment, the linkage structure includes a pull rod 203, one end of the pull rod 203 is hinged to the main pressure rod 200, and the other end of the pull rod 203 is hinged to the top block 202; a hinge seat 204 is provided on the fixed half cylinder 101, and the top block 202 is eccentrically hinged to the hinge seat 204, and the hinge seat 204 is arranged away from the center of the top block 202.

[0070] In this way, the eccentric hinge enables the top block 202 to more flexibly control the movement of the secondary pressure rod 201 during the swinging process, further improving the reliability and response speed of the locking and unlocking process, thereby optimizing the mechanical performance of the device and reducing the complexity and cost of the device.

[0071] 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 205 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 the linkage structure is connected to the main lower section.

[0072] The auxiliary pressure rod 201 extends above the movable half-cylinder 102 to form an auxiliary upper section. The auxiliary upper section is connected to an auxiliary spring 206 that drives the auxiliary pressure rod 201 to return upward. The lower part of the auxiliary pressure rod 201 forms a auxiliary lower section. The top of the movable half-cylinder 102 has a top plate 207.

[0073] The secondary pressure rod 201 is provided with a transverse portion 208 that abuts against the top block 202. When the locking structure is in the locked state, the top block 202 supports the transverse portion 208 from bottom to top, limiting the downward movement of the secondary pressure rod 201; when the top block 202 is separated from the support of the transverse portion 208, the locking structure is in the unlocked state, the secondary pressure rod 201 moves downward, driving the movable half-cylinder 102 to move downward relative to the fixed half-cylinder 101, and the snap structure is in the disengaged state.

[0074] The main pressure rod 200 and the auxiliary pressure rod 201 are equipped with a main spring 205 and an auxiliary spring 206 respectively, so as to realize the automatic reset function, which not only improves the automation level of the equipment but also reduces the labor intensity of the operator;

[0075] In the locked state, the top block 202 supports the transverse portion 208 of the secondary pressure rod 201 to limit its movement; in the unlocked state, the top block 202 is separated from the support, and the secondary pressure rod 201 can move downward quickly, driving the movable half cylinder 102 to open, thereby achieving rapid slag discharge.

[0076] 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.

[0077] 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.

[0078] When the drill tube is in the enclosed state and the cylinder cavity 103 is filled with soil, the soil squeezes the longitudinal elastic strip 300 and deforms it laterally until the longitudinal strip 302 abuts against the inner wall of the fixed half cylinder 101. The longitudinal elastic strip 300 is in compression deformation.

[0079] When the drill tube is in the open state, the longitudinal elastic strip 300 elastically returns to its original shape and deforms outward, driving the soil in the tube cavity 103 to separate from the inner wall of the fixed half tube 101 .

[0080] In this way, the adhesion problem between the soil and the inner wall of the fixed half-tube 101 during the slag discharge process of the drill tube can be effectively solved, thereby improving the slag discharge efficiency, reducing the residual soil in the drill tube, and further improving the construction efficiency.

[0081] 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.

[0082] When the drill barrel is in the enclosed state and the barrel cavity 103 is filled with soil, the soil 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; when the drill barrel is in the open state, the transverse elastic strip 303 elastically returns to its original shape outward, driving the soil in the barrel cavity 103 to separate from the inner wall of the movable half-cylinder 102.

[0083] In this way, the adhesion problem between the soil and the inner wall of the movable half-cylinder 102 during the slag discharge process of the drill tube can be effectively solved, thereby improving the slag discharge efficiency, reducing the residual soil in the drill tube, and further improving the construction efficiency.

[0084] 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.

[0085] 1. Key technologies:

[0086] 1) The rotary split drill bit consists of two parts: the top head and the drill barrel, and the whole adopts a steel structure design;

[0087] 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 can be 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 can be opened to unload the debris.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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;

[0093] 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.

[0094] 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.

[0095] 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;

[0096] 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.

[0097] Second, operation points:

[0098] 1) Use an excavator to level the site and remove above-ground and underground obstacles.

[0099] 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.

[0100] 3) Install the split drill barrel on the rotary drilling rig and start drilling after it is in place.

[0101] 4) When drilling, use light pressure and slow rotation, and control the verticality of the drill hole to meet the requirements.

[0102] 5) When drilling, control the depth of each drill to prevent the debris in the drill barrel from being too dense.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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 opens outward.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 13) After the drill tube is deslagging, lift the drill bit and move it into the pile hole to continue drilling.

[0111] 14) The accumulated debris shall be cleaned up promptly by excavators on site and transported to the dumping site in a centralized manner.

[0112] 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. The green noise reduction and slag discharge structure of the split-body rotary drill bit is characterized by: The drill barrel comprises a drill barrel and a top head arranged above the drill barrel and connected to the drill rod, wherein the drill barrel comprises a fixed half barrel fixedly connected to the top head and a movable half barrel swingably connected to the top head, wherein the fixed half barrel and the movable half barrel are arranged facing each other; When the movable half-cylinder and the fixed half-cylinder are fixedly connected toward each other as a whole, the movable half-cylinder and the fixed half-cylinder enclose a cylinder cavity with an open bottom and accommodating soil, and the drill barrel is in an enclosed state; when the movable half-cylinder swings away from the fixed half-cylinder, the movable half-cylinder separates from the fixed half-cylinder, the cylinder cavity is opened, and the drill barrel is in an open state; A buckle structure is provided between the movable half-cylinder and the fixed half-cylinder. When the movable half-cylinder moves upward relative to the fixed half-cylinder, the buckle structure is in a connected state, the movable half-cylinder and the fixed half-cylinder are relatively fixed, and the drill tube is in an enclosed state. When the movable half-cylinder moves downward relative to the fixed half-cylinder and the buckle structure is in a disengaged state, the movable half-cylinder is movably arranged relative to the fixed half-cylinder.

2. The green noise reduction and slag removal structure of the rotary split drill bit according to claim 1 is characterized in that: The top head is provided with a top hole with a top opening, a 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 and fixedly connect the drill rod and the top head.

3. The green noise reduction and slag removal structure of the rotary split drill bit according to claim 2 is characterized in that: The top hole is a square hole, and a plurality of pins are passed through the top head. The plurality of pins are arranged at intervals along the height direction of the top head.

4. The green noise reduction and slag discharge structure of the 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. When the locking structure is in a locked state, the locking structure restricts the movable half-cylinder from moving downward relative to the fixed half-cylinder. The movable half-cylinder and the fixed half-cylinder are relatively fixed, and the snap structure is in a connected state. When the locking structure is in the unlocked state, the locking structure is free from the restriction on the downward movement of the movable half-cylinder relative to the fixed half-cylinder.

5. The green noise reduction and slag removal structure of the rotary split drill 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; When the movable half-cylinder moves upward relative to the fixed half-cylinder and the hook is inserted into the slot from bottom to top, the buckle structure is in a connected state; when the movable half-cylinder moves downward relative to the fixed half-cylinder and the hook is disengaged from the slot from top to bottom, the buckle structure is in a disengaged state.

6. The green noise reduction and slag removal structure of the split-body rotary drill bit according to claim 5 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, the linkage structure is connected to a top block that is swingably arranged and limits the downward movement of the secondary pressure rod, when the secondary pressure rod moves downward, the secondary pressure rod drives the movable half cylinder to move downward relative to the fixed half cylinder; When the main pressure rod moves downward, the linkage structure drives the top block to swing, so that the top block is separated from the bottom-up support of the auxiliary pressure rod, and the locking structure is in an unlocked state; When the locking structure is in the unlocked state, the secondary pressure rod moves downward, driving the movable half-cylinder to move downward relative to the fixed half-cylinder, the hook disengages from the slot from top to bottom, and the buckle structure is in the disengaged state.

7. The green noise reduction and slag removal structure of the split-body rotary drill bit according to claim 6 is characterized in that: The linkage structure includes a pull rod, one end of which is hinged to the main pressure rod, and the other end of which is hinged to the top block; a hinge seat is provided on the fixed half cylinder, the top block is eccentrically hinged to the hinge seat, and the hinge seat is arranged away from the center of the top block.

8. The green noise reduction and slag removal structure of the split-body rotary drill bit according to claim 6, 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 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. The secondary pressure rod is provided with a transverse portion abutting against the top block. When the locking structure is in a locked state, the top block supports the transverse portion from bottom to top, limiting the downward movement of the secondary pressure rod. When the top block is disengaged from the support for the transverse portion, the locking structure is in an unlocked state, the secondary pressure rod moves downward, driving the movable half-cylinder to move downward relative to the fixed half-cylinder, and the snap structure is in a disengaged state.

9. The green noise reduction and slag removal structure of a split-body rotary drill 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; When the drill tube is in the enclosed state and the tube cavity is filled with soil, the soil squeezes the longitudinal elastic strip to deform laterally until the longitudinal strip abuts against the inner wall of the fixed half tube, and the longitudinal elastic strip is in compression deformation; When the drill tube is in an open state, the longitudinal elastic strip is elastically reset and deformed outwards, driving the soil in the tube cavity to separate from the inner side wall of the fixed half tube.

10. The green noise reduction and slag removal structure of a split-body rotary drill 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; When the drill barrel is in a closed state and the barrel cavity is filled with soil, the soil squeezes the transverse elastic strip to deform 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; when the drill barrel is in an open state, the transverse elastic strip elastically resets and deforms outward, driving the soil in the barrel cavity to separate from the inner wall of the movable half barrel.

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