An automatic thread clearing device for drilling tools

Abstract

This utility model discloses an automatic cleaning device for drilling tools, relating to the field of drilling equipment maintenance technology. It includes a frame with a housing on the frame. An inner ring is rotatably connected to the inner wall of the housing. The inner ring, near the side wall of the housing, forms an execution cavity with the housing. Several baffles are fixedly connected to the side of the inner ring near the housing. Several through holes are opened on the side wall of the inner ring, and the execution cavity communicates with the outside through these through holes. Several adjusting plates are also provided on the side of the inner ring near the housing axis. Elastic elements are provided on the adjusting rings, and all elastic elements are fixedly connected to the outer wall of the inner ring. A cleaning brush is fixedly connected to the side wall of the adjusting plates away from the inner ring to reduce damage to the power components caused by the high humidity of the cleaning environment.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment maintenance technology, and in particular to an automatic cleaning device for drilling tools. Background Technology

[0002] In the field of oil and gas drilling engineering, cleaning the drill pipe thread (commonly known as "drill pipe threads") is a critical fundamental process that affects wellbore integrity, operational safety, and equipment lifespan. Its core purpose is to ensure that the drill pipe thread connection achieves the designed sealing performance and structural strength, thereby effectively preventing serious accidents such as drilling fluid leakage, joint expansion or sticking, and even drill string failure.

[0003] In existing technologies, a complete cleaning process typically begins with initial scraping or brushing to remove large clumps of mud and solidified grease, followed by pressurized fluid jet cleaning as the primary process. The scraping or brushing step is often performed manually. During on-site processing, operators use handheld brass wire brushes or hard nylon brushes to scrub the threads of the drill pipe. This process inevitably produces splashed oil stains, which can easily affect the working environment, increasing the workload for operators. Furthermore, the actual operation of this method involves significant physical exertion for the operators.

[0004] To address the aforementioned issues, Chinese Patent CN204357356U discloses a drill pipe thread cleaner, comprising: a cleaning head, a high-pressure water spray pipe, a drive mechanism, a handle, and a connecting rod. The cleaning head is connected to the drive mechanism via the connecting rod. The high-pressure water spray pipe is connected to the drive mechanism and has a high-pressure water connector at one end for connecting to an external high-pressure water pipe. The handle is connected to the drive mechanism for the worker to grip. The cleaning head can be a female or male thread cleaning head. It also includes a quick connector; one end of the cleaning head has a threaded hole, which is installed on the cleaning head. One end of the connecting rod is tightened within the quick connector, and the other end is tightened within the drive mechanism. The high-pressure water spray pipe and the handle are both fixed to the drive mechanism with screws. This solution uses a drive component to move the cleaning head to clean the threaded portion of the drill pipe, thereby reducing the labor intensity of workers during the cleaning process.

[0005] However, while the above solutions can reduce the adverse effects of splashed oil stains on the working environment, the cleaning process requires the use of pressurized fluid to treat the drill rod threads. The humidity at the operating site is often high, and high humidity inevitably causes corrosion and wear of the drive components, thereby reducing the life of the power components. Utility Model Content

[0006] The purpose of this invention is to provide an automatic cleaning device for drilling tools to solve the above-mentioned problems.

[0007] This utility model is achieved through the following technical solution: An automatic cleaning device for drill bits includes a frame with a hollow cylindrical shell mounted on the frame. An inner ring is rotatably connected to the inner wall of the shell. The outer wall of the inner ring and the inner wall of the shell form an execution chamber. The inner wall of the inner ring forms a cleaning chamber. A pressure-boosting nozzle is located at the output end of the execution chamber and on its side wall. The input end of the pressure-boosting nozzle is connected to an external water pipe. The pressure-boosting nozzle is used to pump fluid into the execution chamber. The execution chamber contains several baffles, and the inner ring side wall has several through holes. The execution chamber is connected to the through holes. The hole communicates with the cleaning chamber. The inner ring is also provided with several adjusting plates on the side near the axis of the housing. The adjusting ring is fixedly connected to the inner ring through an elastic element. A cleaning brush is fixedly connected to the side wall of the adjusting plate away from the inner ring. This solution does not require the use of external equipment to generate torque, effectively avoiding equipment failure due to corrosion of key components in humid environments, thereby extending the service life of the tool. At the same time, as the inner ring rotates, the through hole also rotates, so that the water flow used for cleaning can follow the through hole and traverse all positions of the drill bit, thereby reducing cleaning dead corners.

[0008] Furthermore, the booster nozzle is arranged radially inclined relative to the housing, and is used to pump fluid into the execution chamber. Compared to a solution without a booster nozzle, this solution allows the water flow entering the execution chamber to have greater kinetic energy, thus preventing the water flow from failing to drive the inner ring to rotate, thereby affecting the cleaning effect on the drill pipe threads. Simultaneously, by arranging the booster nozzle at an angle, compared to using a booster nozzle radially aligned with the housing, when the kinetic-energy water flow impacts the inner ring and baffle, this solution applies less force radially to the inner ring; that is, the force that drives the inner ring to move radially is less, thereby reducing the probability of the water flow causing the inner ring to vibrate or deviate, improving the stability of the device operation, and reducing the loss of kinetic energy transfer from the water flow to the inner ring.

[0009] Furthermore, the end of the baffle furthest from the inner ring is clearance-fitted with the inner sidewall of the housing. The sidewall of the baffle is provided with several ball bearings, and the baffle moves circumferentially against the inner sidewall of the housing via these ball bearings. In this design, by using a clearance fit between the baffle and the housing, the flow of water between the baffles is reduced, thus reducing the loss of kinetic energy of the water flow within the actuation cavity. Compared to existing technologies, this design allows most of the impact force of the water flow to be used to propel the baffle, reducing the kinetic energy loss of the water flow. Simultaneously, this design also utilizes the ball bearing design to convert the sliding friction between the baffle and the housing into rolling friction between the ball bearings and the housing, thereby reducing the loss of kinetic energy due to friction during the baffle's movement.

[0010] Furthermore, each through hole is equipped with a sealing block. The small-diameter end of the sealing block is on the same side as the outer circumferential wall of the inner ring. A connecting rod is provided on the end face of the small-diameter end of the sealing block, and a limiting plate is provided on the other end of the connecting rod. Several holes are opened on the limiting plate. When the through hole moves to the lowest point, the sealing block completely closes the through hole. When the through hole moves to the highest point, the sealing block adjusts the opening of the through hole to the maximum opening. In this solution, through the design of the sealing block, the opening of the through hole changes with its own position. Compared with the prior art, this solution can effectively prevent water contaminated by oil stains attached to the drill rod from accumulating in the cleaning chamber when the through hole moves below the inner ring axis, thus preventing it from entering the execution chamber through the through hole, hindering the subsequent movement of the baffle, and increasing the cleaning steps of the subsequent device.

[0011] Furthermore, the baffles are evenly arranged around the axis of the housing. Compared with the prior art, this solution can reduce the centroid shift caused by uneven mass distribution at various angles in the initial state of the inner ring, which in turn affects the stability of the inner ring operation and the service life of the device.

[0012] Furthermore, both sides of the housing are provided with elastic sealing strips, and the housing has an opening through which the actuation chamber communicates with the outside. Compared with the prior art, this solution, through sealing strips and other means, further avoids splashing of water carrying oil during use. At the same time, the opening allows operators to collect and recycle water carrying oil, reducing water waste.

[0013] Furthermore, each of the adjusting plates has a water storage tank on its side wall near the elastic element. The water storage tank collects fluid that comes into contact with the adjusting plate and increases the contact area between the fluid and the side wall of the adjusting plate. This design, through the design of the water storage tank, continuously adjusts the center of gravity of the adjusting plate by collecting and releasing water, thereby further promoting the oscillation of the cleaning brush and improving the cleaning effect of the device.

[0014] Furthermore, the cleaning brush includes a handle fixedly connected to the inner wall of the inner ring. A brush head is located on the side of the handle away from the inner ring, and several bristles are fixedly connected to the brush head. The brush head also has several opening grooves. This design, through the opening grooves, better conforms to the drill rod thread compared to traditional designs, reducing the difference in force applied by the brush head to the root and crest of the thread, thereby reducing the probability of the brush head damaging the thread crest.

[0015] Furthermore, the brush handle includes a fixed section and a sliding section. The fixed section is sleeved on the sliding section, and the end of the fixed section near the adjusting plate is fixedly connected to the adjusting plate. The end of the sliding section near the brush head is fixedly connected to the brush head. A spring is provided on the fixed section, and the spring is fixedly connected to the outer wall of the sliding section. This design, through the sliding section and the fixed end, allows for adjustment of the brush handle length to better accommodate the cleaning needs of drill rod clips of different sizes. Simultaneously, the spring design allows operators to adapt to drill rod clips of varying cleaning difficulty by changing the elastic modulus.

[0016] Furthermore, the housing is also equipped with a chuck, which is coaxially and fixedly connected to the housing. This solution uses a chuck to fix the drill rod, which, compared to existing technologies, prevents the drill rod from rotating with the cleaning brush during the cleaning process, thus avoiding any impact on the cleaning effect of the brush.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. This utility model utilizes the kinetic energy of the water flow used to clean the drill rod clips through the inner ring design. This energy drives the cleaning brush to clean the drill rod clips and also drives the water flow around the drill rod, promoting contact between the water flow and the drill rod clips. This facilitates the loosening or removal of oil stains on the drill rod clips, improving the cleaning effect of the device. Compared to existing technologies, the kinetic energy in this solution is mainly provided by pressurized water flow, making the power source less affected by humidity. This reduces the risk of premature corrosion and damage to the device due to excessive humidity, thus affecting its overall service life. Furthermore, the outer shell design of this solution limits the inner ring, preventing linear displacement after water flow impact, which would affect the cleaning effect. It also prevents water carrying oil stains from splashing, significantly reducing the impact of oil stains on operator health and environmental pollution compared to existing technologies, thus minimizing the difficulty of subsequent environmental cleaning. Meanwhile, this solution also uses the design of an adjusting plate to continuously adjust the center of gravity of the adjusting plate by the oil splashing along with the water flow during the cleaning process. This causes the cleaning brush to swing slightly, thereby increasing the probability of oil stains falling off the drill rod clip through continuous friction of the cleaning brush.

[0018] 2. In this utility model, by adjusting the position of the baffle and the through hole, the damage during the process of water flow energy being transferred to the inner ring is further reduced, and the structure of the cleaning brush is changed so that the cleaning brush can adapt to the cleaning needs of drill rod threads of different sizes. At the same time, the pressure difference applied by the cleaning brush to different areas of the thread is reduced, thereby reducing the probability of thread damage during the brushing process. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of the present invention; Figure 2 This is a side view of the shell in this utility model; Figure 3 for Figure 2 Cross-sectional view along the AA direction; Figure 4 for Figure 2 Sectional view along the BB direction; Figure 5 for Figure 3 Enlarged view of point C in the middle.

[0020] The reference numerals in the attached drawings represent: 1. Frame; 2. Housing; 21. Pressure nozzle; 22. Sealing strip; 23. Cleaning brush; 231. Fixed section; 232. Sliding section; 233. Spring; 234. Brush head; 24. Inner ring; 241. Through hole; 2411. Sealing block; 242. Groove; 25. Baffle; 251. Ball bearing; 26. Adjusting plate; 261. Elastic element; 27. Opening; 3. Chuck. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are for explaining the utility model only and are not intended to limit the utility model. It should be noted that this utility model is already in the actual research and development stage.

[0022] Example 1 like Figures 1 to 4 As shown, this embodiment includes a frame 1, on which a hollow cylindrical shell 2 is provided. The shell 2 is welded and fixed to the frame 1, and a chuck 3 is provided on the shell 2. The chuck 3 is coaxially fixed to the shell 2 by bolts. An inner ring 24 that mates with the shell 2 is rotatably connected to the inner side wall of the shell 2. The gap between the outer side wall of the inner ring 24 and the inner side wall of the shell 2 forms an execution cavity. Several grooves 242 for water storage are also opened on the outer circumferential wall of the inner ring (24). The space enclosed by the inner circumferential side wall of the inner ring 24 forms a cleaning cavity. A pressurizing nozzle 21 is provided on the side wall of the execution cavity. The input end of the pressurizing nozzle 21 is connected to an external water pipe. The pressurizing nozzle 21 is used to pump fluid into the execution cavity.

[0023] A plurality of baffles 25 are welded and fixed to the side of the inner ring 24 away from the axis of the housing 2. The baffles 25 are evenly arranged around the axis of the housing 2. A plurality of through holes 241 are opened on the side wall of the inner ring 24. Each through hole 241 is provided with a wedge-shaped sealing block 2411. The small diameter end of the sealing block 2411 is on the same side as the outer circumferential wall of the inner ring 24. A connecting rod 2412 is provided on the end face of the small diameter end of the sealing block 2411. The other end of the connecting rod 2412 is provided with a limiting plate 2413, and the limiting plate 2413 is provided with a plurality of holes. When the through hole 241 moves to the lowest point, the sealing block 2411 completely closes the through hole 241. When the through hole 241 moves to the highest point, the sealing block 2411 adjusts the opening of the through hole 241 to the desired position. At maximum opening, the baffle 25 divides the execution chamber into several sub-chambers, which are connected to the cleaning chamber through through holes 241. Several adjusting plates 26 are also provided on the side of the inner ring 24 near the axis of the housing 2. Elastic elements 261, which are rubber strips, are bonded to the adjusting ring. Each elastic element 261 is bonded to the side wall of the inner ring 24 near the axis of the housing 2. Water storage tanks are formed on the side walls of the adjusting plates 26 near the elastic elements 261. These tanks collect fluid that comes into contact with the adjusting plates 26 and increase the contact area between the fluid and the side walls of the adjusting plates 26. A cleaning brush 23 is bolted to the side wall of the adjusting plate 26 away from the inner ring 24. In this embodiment, the cleaning brush 23 is an arc-shaped nylon brush.

[0024] The booster nozzle 21 is arranged radially inclined relative to the housing 2. The booster nozzle 21 is used to pump fluid into the execution chamber. The side wall of the baffle is provided with a plurality of balls 251. The baffle 25 contacts the inner side wall of the housing 2 through the balls 251.

[0025] The specific implementation method is as follows: During the use of this device, the drill rod is moved to a suitable position and fixed. Then, the drill rod threaded part is passed through the inner ring 24 into the cleaning chamber, so that the inner ring 24 can completely cover the threaded part of the drill rod thread. The drill rod is fixed to the housing 2 by the chuck 3. The water source is connected to the input end of the execution chamber through a hose, etc., to complete the installation of this device.

[0026] As water enters the device, the kinetic energy of the water increases significantly due to the design of the pressurized nozzle 21, and the water flow gains higher speed and impact force. When the water flow enters the actuation chamber, it impacts the baffle 25 or the inner ring 24, thereby transferring kinetic energy to the baffle 25 and the inner ring 24. At this time, due to the inclined arrangement of the pressurized nozzle 21, the force exerted by the water flow on the baffle 25 or the inner ring 24 is more likely to generate torque, causing the inner ring 24 to start rotating.

[0027] During the rotation of the inner ring 24, water enters the sub-chamber and moves with the rotation of the inner ring. As the sub-chamber rotates towards the bottom of the inner ring, the sealing block 2411 moves downward under the action of gravity. At this time, the sealing block 2411 moves away from the axis of the inner ring, and the opening of the through hole gradually decreases. When the through hole reaches the lowest point of the inner ring, the sealing block 2411 completely closes the through hole, thereby preventing sewage accumulated in the clean chamber from entering the sub-chamber through the through hole. After the through hole passes the lowest point of the inner ring, it gradually moves towards the highest point of the inner ring. During the process, under the action of gravity, the sealing block 2411 continues to move downward. At this time, the sealing block 2411 moves towards the inner ring axis, and the opening of the through hole gradually increases. When the through hole reaches the highest point of the inner ring, the opening of the through hole reaches its maximum value, so that the water inside the sub-cavity can be sprayed onto the drill rod through the through hole, promoting the loosening or even removal of the oil stains attached to the threaded part of the drill rod. As the inner ring 24 rotates, the inner ring 24 drives the cleaning brush 23 to move, so as to scrape the threaded part, thereby cleaning the drill rod thread.

[0028] As the inner ring rotates, the liquid entering the actuation chamber gradually leaves the actuation chamber through the gap between the inner ring and the outer shell under the action of gravity. When the actuation chamber reaches its lowest point, the liquid inside is basically drained. This reduces the work that the inner ring needs to do to overcome the gravity of the liquid inside the actuation chamber during rotation, further reducing the pressure requirement of the cleaning water during the use of this device. This helps to reduce the problem of the device being unusable due to insufficient water pressure.

[0029] During this process, as water flows into the actuator chamber, it leaves the actuator chamber through the gap between the inner ring and the outer shell. Some water flows into the groove, so that the actuator chamber is at a higher position. A certain amount of water can enter the cleaning chamber through the through hole to clean the drill rod thread and promote the loosening of oil stains on the drill rod thread.

[0030] After the water is gradually sprayed onto the drill rod clip, it eventually detaches from the device through the gap between the housing 2 and the drill rod under the action of gravity. This is to avoid the water from accumulating in large quantities in the gap between the housing 2 and the drill rod or in the execution cavity, which would affect the cleaning effect of the pressurized water flow on the drill rod clip.

[0031] During the process described above, as the water flow collides with the drill bit thread and splashes with oil, the splashing water impacts the regulating plate, causing it to shake. This, in turn, causes the cleaning brush 23 to shake, resulting in reciprocating friction between the cleaning brush 23 and the drill rod thread, further promoting the removal of auxiliary oil from the thread. Simultaneously, after the water carrying oil comes into contact with the regulating plate 26, some oil adheres to the side wall of the regulating plate 26. Due to the location of the oil residue, the center of mass of the regulating plate 26 shifts. Under the same centrifugal force, the trajectory of the regulating plate 26 changes. As cleaning progresses, more oil adheres to different locations on the regulating plate 26, causing its center of mass to shift multiple times, resulting in multiple changes in its trajectory. This, in turn, causes the cleaning brush 23 to swing more dramatically, further enhancing its cleaning efficiency. Meanwhile, due to the design of the regulating plate, oil stains adhere to the regulating plate, thereby allowing the oil stains to adhere to the inner wall of the housing 2, the connection between the inner ring 24 and the housing 2, and the output end of the housing 2 along with the water flow, reducing the probability of oil stains clogging the output end of the housing 2 and hindering the rotation of the inner ring 24.

[0032] Meanwhile, this solution also incorporates a water storage tank design. During the cleaning of the drill rod thread using this device, water flows into the water storage tank. Due to the surface tension of the water, some of the water remains in the water storage tank and, following the rotation of the inner ring 24, gradually leaves the water storage tank under the action of gravity or centrifugal force. This process further causes frequent changes in the center of mass of the adjusting plate 26, which in turn drives the oscillation of the cleaning brush 23, thereby enhancing the cleaning ability of this device.

[0033] The design of the booster nozzle 21 in this solution, compared to the previous solution that connects the input end of the execution chamber to the water source, has lower requirements for the water pressure of the water source. This allows the solution to adapt to different usage scenarios and avoids the implementation of the solution being limited by the usage scenario.

[0034] Meanwhile, by evenly arranging the baffles 25, this design avoids the center of mass of the inner ring 24 from shifting during initial rotation, thus preventing additional vibration and load. This would consume more kinetic energy during the initial startup of the device, affecting the rotation of the inner ring 24 and consequently impacting the cleaning effect on the drill rod thread. Furthermore, the radially inclined design of the baffles 25 and the inner ring 24, compared to designs where the baffles 25 and the inner ring 24 are radially aligned, allows the baffles 25 to guide the water flow, reducing kinetic energy loss caused by water impacting the baffles 25 or the inner ring 24. Additionally, when water flows on one side of the baffles 25, a pressure difference exists between that side and the other side, and the air pressure on the side where the water flows is often lower than on the other side. This allows the air pressure to exert a force on the baffles 25, promoting their movement and more efficiently converting the kinetic energy of the water into the mechanical energy of the inner ring 24's rotation.

[0035] Compared to the traditional method of manually cleaning drill rod clips using cleaning brushes 23, this method only requires the operator to place the drill rod in the appropriate position on the device and fix it, and then introduce liquid into the device to complete the cleaning of the drill rod clips. The steps are simple and convenient, and the professional skills required of the operator are low. In addition, the design of the housing 2 prevents water carrying oil and dirt from splashing, which could affect the health of the surrounding operators and increase the difficulty of subsequent environmental cleaning.

[0036] At the same time, as the inner ring 24 rotates, the through hole 241 moves around the axis of the rotating rod, thereby loosening the oil stains at various positions of the drill rod buckle, reducing cleaning dead angles and improving the cleaning ability of the device.

[0037] Example 2 The difference from the above embodiment is that: the side wall of the baffle is provided with a plurality of ball bearings 251, and the baffle contacts the inner side wall of the housing through the ball bearings 251. Both sides of the housing 2 are provided with sealing strips 22 made of elastic material, and the housing 2 is provided with an opening 27, through which the cleaning chamber communicates with the outside.

[0038] The specific implementation method is as follows: During the use of this device, by using the gap fit between the baffle and the inner wall of the housing and the design of the ball bearing 251 on the baffle, the water flow enters any actuation chamber and drives the inner ring 24 to rotate. During this process, the water entering the actuation chamber is difficult to leave through the gap between the baffle 25 and the inner wall of the housing 2. Most of the water can only leave the actuation chamber through the through hole 241. At this time, most of the impact force of the water entering the actuation chamber is used to push the baffle 25 to move, thereby making the kinetic energy more efficiently transferred to the inner ring 24 and reducing the loss of water kinetic energy during the operation of the device.

[0039] Furthermore, the design of the ball bearing 251 in this solution, compared to the solution where the baffle directly contacts the housing, allows the ball bearing 251 to convert the sliding friction between the baffle and the housing into rolling friction, thereby reducing the kinetic energy lost due to friction during their relative rotation.

[0040] Meanwhile, this design also incorporates a sealing strip 22, which, through its elastic deformation, seals the gap between the housing 2 and the drill rod, further preventing water carrying oil from splashing and affecting the health of operators and polluting the surrounding environment. Additionally, the design includes an opening 27, where operators can use flexible hoses or similar devices to guide and collect water leaving the device, further preventing oil-laden water from polluting the environment and facilitating water recycling, thus reducing water waste.

[0041] Example 3 The difference from the above embodiment is that the cleaning brush 23 includes a brush handle. In this solution, a plurality of bristles are fixedly connected to the brush head 234, and a brush surface is bonded and fixed to the brush head 234. The material of the brush surface is brass wire brush. A plurality of opening grooves are opened on the brush surface away from the brush head. The depth of the opening grooves is slightly greater than the thread depth of the drill rod, so that the brush surface contacts the root of the thread, the bottom wall of the opening groove contacts the crest of the thread, and the opening grooves are all arranged at an angle relative to the bottom wall of the housing 2.

[0042] The brush handle includes a fixed section 231 and a sliding section 232. The sliding section is frustum-shaped, and the large-diameter section of the sliding section is welded and fixed to the brush head. The fixed section 231 is sleeved on the outer wall of the sliding section 232, and the fixed end is close to the adjusting plate 26 and is fixedly connected to the adjusting plate 26 by bolts. A spring 233 is welded and fixed on the fixed section 231, and the end of the spring 233 away from the fixed section 231 is welded and fixed to the sliding section 232.

[0043] The specific implementation plan is as follows: During the use of this plan, after the device is installed, the reaction force applied by the drill rod to the brush head 234 pushes the sliding section 232 to move towards the fixed section 231, reducing the length of the brush handle to accommodate the cleaning needs of drill rods of different sizes. Simultaneously, the sliding section 232 compresses the spring 233, causing the spring 233 to undergo elastic deformation. Under its elastic force, the brush head 234 is pushed against the drill rod through the sliding section 232, preventing insufficient positive pressure that could lead to insufficient friction between the brush head 234 and the drill rod, thus reducing the cleaning ability of the brush head 234. Furthermore, the design of the spring 233 in this plan allows operators to adjust the positive pressure applied by the brush head 234 to the drill rod by replacing springs 233 with different elastic moduli.

[0044] Meanwhile, this design also incorporates an inclined slot design, allowing the drill rod thread crest to enter the slot, while the brass wire between the two slots enters the drill rod thread root. Compared to designs without slots, under the same positive pressure, the brush head 234 in this design can better lift the threaded portion of the drill rod thread, and the difference in force applied by the brush head 234 to the thread root and crest is smaller. This effectively avoids increasing the positive pressure applied by the brush head 234 to the drill rod thread to ensure a better cleaning effect at the root, which could damage the crest.

[0045] Meanwhile, the frustum-shaped design of the sliding section in this solution can effectively prevent the sliding section from detaching from the fixed end under the action of gravity when the device is not in use, thereby excessively and continuously stretching the spring, causing stress relaxation and creep of the spring, and affecting the subsequent use of the spring.

[0046] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An automatic thread clearing device for drill bits, comprising a frame (1), wherein the frame (1) is provided with a hollow cylindrical shell (2), characterized in that: The inner wall of the housing (2) is rotatably connected to an inner ring (24) that cooperates with the housing (2). The gap between the outer wall of the inner ring (24) and the inner wall of the housing (2) forms an execution cavity. The outer circumferential wall of the inner ring (24) is also provided with several grooves (242) for water storage. The space enclosed by the inner circumferential sidewall of the inner ring (24) forms a cleaning cavity. The sidewall of the execution cavity is provided with a pressure-boosting nozzle (21). The input end of the pressure-boosting nozzle (21) is connected to an external water pipe. The execution cavity is provided with several baffles (25). The bottom wall of the groove (242) is provided with several through holes (241). The execution cavity is connected to the cleaning cavity through the through holes (241). The outer circumferential wall of the inner ring is fixedly connected with several adjusting plates (26) by elastic elements. The inner circumferential sidewall of the adjusting plate (26) is fixedly connected with a cleaning brush (23).

2. The automatic thread clearing device for drilling tools according to claim 1, characterized in that: The axis of the output end of the booster nozzle (21) does not coincide with the radial direction of the housing (2), and the booster nozzle (21) is used to pump fluid into the execution chamber.

3. An automatic thread clearing device for drilling tools according to claim 1, characterized in that: The baffle (25) is provided with a plurality of balls (251) at one end away from the inner ring (24), and the baffle (25) contacts the inner wall of the housing (2) through the balls (251).

4. An automatic thread clearing device for drilling tools according to claim 3, characterized in that: The through hole (241) is provided with a frustum-shaped sealing block (2411). The small diameter end of the sealing block (2411) is on the same side as the outer circumferential wall of the inner ring (24). A connecting rod is provided on the end face of the small diameter end of the sealing block (2411). A limiting plate is provided at the other end of the connecting rod, and several holes are opened on the limiting plate.

5. An automatic thread clearing device for drilling tools according to claim 1, characterized in that: The plurality of baffles (25) are evenly arranged around the axis of the housing (2).

6. An automatic thread clearing device for drilling tools according to claim 1, characterized in that: Both sides of the housing (2) are provided with sealing strips (22) made of elastic material, and the housing (2) is provided with an opening (27), through which the cleaning chamber communicates with the outside.

7. An automatic thread clearing device for drilling tools according to claim 1, characterized in that: The regulating plate (26) has a water storage groove on its side wall near the elastic member (261). The water storage groove is used to increase the contact area between the fluid and the side wall of the regulating plate (26).

8. An automatic thread clearing device for drilling tools according to claim 1, characterized in that: The cleaning brush (23) includes a brush handle, which is installed on the inner wall of the inner ring (24). A brush head (234) is provided on the side of the brush handle away from the inner ring (24), and a plurality of bristles are fixedly connected to the brush head (234).

9. An automatic thread clearing device for drilling tools according to claim 8, characterized in that: The brush handle includes a sliding section (232), a fixed section (231) is sleeved on the outer wall of the sliding section (232), and the fixed section (231) is fixedly connected to the inner ring side wall of the inner ring (24). The sliding section (232) is fixedly connected to the brush head (234). A spring (233) is sleeved on the fixed section (231), one end of the spring (233) is fixedly connected to the outer wall of the fixed section (231), and the other end of the spring (233) is fixedly connected to the outer wall of the sliding section (232).

10. An automatic thread clearing device for drilling tools according to claim 1, characterized in that: The housing (2) is also provided with a chuck (3) for fixing the drill rod, and the chuck (3) is coaxially and fixedly connected to the housing (2).

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