A drill bit float signal warning device for vertical shaft drilling rigs

Abstract

The present invention discloses a shaft drilling rig drill bit float signaling and early warning device, comprising a housing, which is installed in the shaft drilling rig drill bit and is adjacent to the drill bit center hole at the center of the drill bit; a roller cutter operation status sensor, which is arranged adjacent to the roller cutter on the bottom surface of the drill bit and is used to generate a roller cutter operation status signal based on the operation status of the roller cutter; a sensor module, which is installed in the housing and is communicatively connected to the roller cutter operation status sensor and the sensor module, which receives and analyzes the roller cutter operation status signal and generates a drive control instruction; and a drive module, which is arranged in the housing and is communicatively connected to the sensor module and receives the drive control instruction issued by the sensor module and drives a float release module to release the float according to the drive control instruction. The present invention can monitor the roller cutter status in real time and accurately, provide effective early warning, and significantly improve the safety and construction efficiency of the shaft drilling rig.

Description

Technical Field

[0001] The present invention relates to the technical field of vertical shaft construction, in particular to a vertical shaft drilling rig drill bit float signaling and early warning device. Background Art

[0002] The well drilling method is a highly efficient underground engineering construction technology that utilizes large vertical shaft drilling rigs to conduct drilling operations from the top down, achieving the goal of all-surface operations and drilling without going down into the well. In the first stage of this method—drilling—the rotation of the drill bit and the rotation of the roller cutter form the vertical shaft from the top down. Simultaneously, reverse circulation of mud diluted with air is used to remove debris and waste from the wellbore, effectively removing the debris and waste from the wellbore, ensuring the continuity and efficiency of the drilling operation.

[0003] In vertical shaft drilling, disc cutters are the primary rock-breaking tool. Their performance and condition directly impact drilling efficiency and costs. Typically, each drill bit is equipped with dozens of disc cutters to ensure adequate rock-breaking capacity and penetration speed. However, disc cutters operate in high-pressure mud environments, exposing them to multiple failure risks.

[0004] First, due to continuous contact with the hard rock, the cutter teeth will wear out, resulting in a decrease in rock-breaking ability. Second, the cutter shaft bearings are also prone to damage under long-term, high-load operation, which in turn affects the normal operation of the cutter. In addition, impurities and particles in the mud may adhere to the cutter surface, forming the so-called "mud-covered drill" phenomenon, which not only reduces the rock-breaking efficiency of the cutter but can also cause the cutter to fail completely.

[0005] Cutter failure not only reduces drilling efficiency and increases construction costs, but can also damage the drilling rig itself and even cause safety accidents. Therefore, timely and accurate monitoring of the cutter's operating status and preventing cutter failure have become urgent technical challenges in vertical shaft drilling projects. Summary of the Invention

[0006] To this end, the technical problem to be solved by the present invention is to provide a vertical shaft drilling rig drill bit float signal warning device, which aims to monitor the working status of the roller cutter in real time through innovative technical means, and issue a warning in time when the roller cutter shows signs of failure, so as to ensure the safety and efficiency of drilling operations.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A vertical shaft drilling rig drill bit float signal warning device, comprising:

[0009] a housing, the housing being mounted inside a drill head of a shaft drilling rig and being adjacent to a central hole of the drill head at a center of the drill head;

[0010] a roller cutter operation state sensor, the roller cutter operation state sensor being disposed adjacent to the roller cutter on the bottom surface of the drill bit and configured to generate a roller cutter operation state signal according to the operation state of the roller cutter;

[0011] A sensor module is installed in the housing, the hob operation status sensor is in communication with the sensor module, and the sensor module receives and analyzes the hob operation status signal and generates a drive control instruction;

[0012] A driving module is arranged in the box, the driving module is in communication with the sensing module, the driving module receives a driving control instruction from the sensing module, and drives the float release module to release the float according to the driving control instruction;

[0013] A float release module is arranged on the outer surface of the housing adjacent to the drill bit center hole, and contains the float; the density of the float is less than the density of the drilling mud in the shaft, and the diameter of the float is less than the diameter of the drill bit center hole; the density of the float is less than the density of the drilling mud in the shaft, which enables the float to float in the drilling mud; the diameter of the float is smaller than the diameter of the drill bit center hole, thereby preventing multiple floats from being stuck in the drill bit center hole when multiple floats are released simultaneously;

[0014] When the cutter goes from normal operation to failure, the cutter operation status sensor sends a cutter operation status signal to the sensor module. The sensor module generates a drive control instruction to control the drive module to drive the float release module to release the float. The float enters the drill bit center hole and floats to the surface in the mud within the drill bit center hole. This device can accurately monitor the cutter status in real time without laying long cables. It has a simple and reliable structure and is easy to install and maintain.

[0015] In the above-mentioned shaft drilling rig drill bit float signal warning device, the sensor module includes an information processor, and the information processor is communicatively connected to the cutter operation status sensor.

[0016] The above-mentioned vertical shaft drilling rig drill bit float signal warning device, the driving module includes an electric cylinder, a push-pull synchronization block and a push-pull rod, the free end of the piston rod of the electric cylinder, the push-pull synchronization block and the push-pull rod are connected in sequence, and the end of the push-pull rod away from the push-pull synchronization block passes through the side wall of the box body and extends to the outside of the box body, and is connected to the float release module.

[0017] In the aforementioned vertical shaft drilling rig drill bit float signaling and warning device, the base of the electric cylinder is fixedly connected to the housing; a push-pull rod seal is installed where the push-pull rod passes through the side wall of the housing. This design ensures stable operation of the drive module in high-pressure mud environments, preventing mud from entering the housing and damaging components, while also ensuring the flexibility and sealing of the push-pull rod.

[0018] The above-mentioned vertical shaft drilling rig drill bit float signal warning device, the float release module includes a ball control cover plate and a ball storage seat that accommodates the float ball; a U-shaped groove is provided on the ball storage seat, and the opening of the U-shaped groove faces the inner cavity of the drill bit center hole; two parallel sliding grooves are processed on the inner wall at the notch position of the U-shaped groove on the ball storage seat, and the sliding grooves are arranged along the length direction of the ball storage seat; the ball control cover plate is slidably connected to the ball storage seat through the sliding grooves; one plate surface of the ball control cover plate faces the inner cavity of the ball storage seat, and the other plate surface faces the inner cavity of the drill bit center hole, and an ear seat is provided on the plate surface of the ball control cover plate facing the inner cavity of the drill bit center hole, and the push-pull rod is driven and connected to the float release module through the ear seat.

[0019] The above-mentioned vertical shaft drilling rig drill bit float signal warning device has a ball socket on the bottom wall of the U-shaped groove on the ball storage seat for limiting the float. The ball socket is a hemispherical depression, and the float is located in the ball socket.

[0020] In the aforementioned vertical shaft drilling rig drill bit float signaling and warning device, the radius of the open socket is greater than the radius of the float; the depth of the socket is less than or equal to the radius of the float; and the vertical distance between the deepest part of the socket and the ball control cover is greater than the diameter of the float and less than 1.2 times the diameter of the float. The larger radius of the open socket creates a gap between the float and the socket, allowing drilling mud to enter this gap and generate buoyancy for the float. The depth of the socket and the distance between the deepest part of the socket and the ball control cover help prevent the float from becoming stuck in the ball reservoir.

[0021] In the above-mentioned vertical shaft drilling rig drill bit float signal warning device, one end of the ball storage seat extends toward the vertical shaft wellhead, and the other end extends toward the vertical shaft bottom; the number of the ball sockets is two or more, and the ball sockets are arranged along the extension direction of the ball storage seat.

[0022] The aforementioned vertical shaft drilling rig drill bit float signaling and warning device includes a float release module further comprising a triangular prism-shaped anti-retention component; the anti-retention component is disposed on one end of the ball storage seat adjacent to the vertical shaft wellhead; the prism side of the anti-retention component includes an anti-retention slope, the anti-retention slope facing the bottom of the vertical shaft, and the distance between the anti-retention slope and the wall of the drill bit center hole gradually decreases from bottom to top in the direction from the bottom of the vertical shaft to the wellhead; the end of the ball storage seat adjacent to the vertical shaft wellhead passes through the anti-retention slope; the ball socket is disposed on the bottom wall of the U-shaped groove of the ball storage seat, located outside the anti-retention component. The anti-retention slope ensures an unobstructed release path for the float, preventing mud deposition or impurity accumulation from causing float release failure.

[0023] The above-mentioned vertical shaft drilling rig drill bit float signal warning device also includes a battery, which is arranged in the box body. The battery is electrically connected to the sensor module and the drive module respectively, and the battery supplies power to the sensor module and the drive module.

[0024] The technical solution of the present invention achieves the following beneficial technical effects:

[0025] 1. This invention comprehensively optimizes the key technical aspects of the cutter failure warning process through its innovatively designed sensor module, drive module, and float release module. Upon detecting a cutter failure signal, the sensor module rapidly triggers drive control instructions, ensuring timely warnings. The float release module, through the sliding interaction of the ball-socket structure of the ball reservoir and the ball-control cover, controls the release of the floats one by one. The synergistic effect of these technical approaches significantly improves the real-time nature of cutter status monitoring and the intelligence of the warning system.

[0026] 2. The present invention ensures the long-term stable operation of the automatic float device in a high-pressure mud environment through the sealed design of the housing and the optimization of the materials of key components. The battery in the housing provides a reliable power source for the sensor module and the drive module, preventing the adverse environment from affecting the performance of the equipment. This device does not require the laying of extra-long cables and has a simple and reliable structure, which is easy to install and maintain. The present invention can issue an early warning at the beginning of cutter failure, avoiding construction interruptions and equipment damage caused by the failure. At the same time, it provides intuitive data support to facilitate quick decision-making, thereby improving the overall construction safety and efficiency of the shaft drilling rig. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a drill bit float signaling and warning device for a vertical shaft drilling rig according to the present invention;

[0028] Figure 2 A schematic diagram of the structure of the drill bit body and the drill rod in the present invention;

[0029] Figure 3A schematic structural diagram of the float release module of the present invention;

[0030] Figure 4 A schematic diagram of a state of the float bin during the float release process in the present invention;

[0031] Figure 5 Schematic diagram of the position of the step on the top of the ball storage seat in the present invention.

[0032] The reference numerals in the figure are as follows: 1-box; 2-battery; 3-sensor module; 301-information processor; 4-drive module; 401-electric cylinder; 402-push-pull synchronization block; 403-push-pull rod; 5-float release module; 501-ball storage seat; 502-float; 503-ball control cover; 504-ear seat; 505-anti-retention component; 5051-anti-retention slope; 506-sliding groove; 507-ear seat channel; 508-ball socket; 509-step; 6-drill bit center hole; 7-drill rod; 8-drill bit body; 9-first seal; 10-box cover; 11-second seal; 12-push-pull rod seal; 13-communication cable. DETAILED DESCRIPTION

[0033] This embodiment provides a drill bit float signaling and warning device for a vertical shaft drilling rig. The drill bit float signaling and warning device for the vertical shaft drilling rig is installed in a drill bit body 8 of the vertical shaft drilling rig.

[0034] like Figure 2 As shown, a roller cutter is provided on the bottom surface of the drill bit body 8. A drill rod 7 is connected to the center of the top surface of the drill bit body. A drill bit center hole 6 is provided through the center of the drill bit body 8 and the drill rod 7. The drill bit center hole 6 is coaxial with the drill bit body 8 and the drill rod 7. One end of the drill bit center hole 6 passes through the bottom surface of the drill bit body 8 and is in fluid communication with the vertical shaft wellbore, while the other end is in fluid communication with the surface mud pool. The vertical shaft drilling rig drill bit float signaling and warning device is located adjacent to the drill bit center hole 6.

[0035] like Figure 1 As shown, the shaft drilling rig drill bit float signaling and warning device includes a housing 1, designed as a protective component to completely isolate the high-pressure mud environment. Multiple components are integrated within the housing. The interior of the housing 1 is effectively sealed by a first seal 9 and a housing cover 10, ensuring that the internal components (sensing module 3 and driving module 4) are protected from external damage in the high-pressure mud environment.

[0036] The shaft drilling rig drill bit float signaling and warning system also includes a cutter operating status sensor. This sensor, located adjacent to the cutter on the bottom surface of the drill bit, generates a cutter operating status signal based on the cutter's operating status and transmits the signal to the sensor module 3 via a communication cable 13. The communication cable 13 passes through the bottom wall of the housing 1. A second seal 11 is located where the communication cable 13 passes through the bottom wall of the housing 1. This seal prevents mud from entering the interior of the housing 1.

[0037] The sensor module 3 includes an information processor 301 and a signal connection line. The information processor 301 is used to receive and analyze the signal transmitted by the hob operation status sensor. When the analysis shows that the hob operation is abnormal, a drive control instruction is generated and the drive control instruction is transmitted to the drive module 4 through the signal connection line.

[0038] The drive module 4 is used to receive drive control commands from the sensor module 3 and, in response to these commands, drive the float release module 5 to release the float 502. The drive module 4 comprises an electric cylinder 401, a push-pull synchronization block 402, and a push-pull rod 403. The base of the electric cylinder 401 is fixed inside the housing 1, and the free end of its piston rod is connected to the push-pull rod 403 via the push-pull synchronization block 402. Specifically, the free end of the piston rod of the electric cylinder 401, the push-pull synchronization block 402, and the push-pull rod 403 are sequentially connected. The piston rod of the electric cylinder 401 can be extended or retracted, and the push-pull synchronization block 402 drives the push-pull rod 403 to move. The end of the push-pull rod 403, away from the push-pull synchronization block 402, passes through the side wall of the housing 1 and extends to the outside of the housing 1. A push-pull rod seal 12 is provided where the push-pull rod 403 passes through the housing side wall. The seal 12 fits over the push-pull rod 403 to ensure isolation between the internal and external environments of the housing.

[0039] The float release module 5 is located on the outer surface of the housing 1, adjacent to the drill bit's center hole 6. Its core components include a ball reservoir 501 and a ball control cover plate 503. The reservoir 501 has a U-shaped groove, opening toward the inner cavity of the drill bit's center hole 6. A ball socket 508, designed to limit the movement of the float 502, is located at the bottom wall of the U-shaped groove on the reservoir 501. This hemispherical recess has a depth equal to the radius of the float 502. The vertical distance between the deepest point of the socket 508 and the ball control cover plate 503 is greater than the diameter of the float 502 but less than 1.2 times its diameter.

[0040] A sliding groove 506 is machined at the notch of the U-shaped groove on the ball storage seat 501 and extends along the length of the ball storage seat 501. The ball control cover plate 503 is slidably connected to the ball storage seat 501 via the sliding groove 506. One surface of the ball control cover plate 503 faces the inner cavity of the ball storage seat 501, and the other surface faces the inner cavity of the drill bit center hole 6. The ball control cover plate 503 is provided with an ear seat 504, through which the push-pull rod 403 of the drive module 4 is driven and connected to the float release module 5. The ball control cover plate 503 slides within the sliding groove 506 to control the number of floats released.

[0041] In the initial state, the piston rod of the electric cylinder 401 is fully retracted, and the ball control cover 503 closes the U-shaped opening of the ball storage seat 501 (the opening facing the drill bit center hole 6), ensuring that all floating balls 502 are controlled within the ball socket 508. The radius of the opening of the ball socket 508 is larger than the radius of the floating ball 502, which creates a gap between the floating ball and the socket. The surrounding area of ​​the floating ball 502 is filled with mud, and the floating ball 502 is affected by the buoyancy and constantly moves slightly.

[0042] When the cutter wheel is operating abnormally, the sensor module 3 generates a drive control command, causing the electric cylinder 401 of the drive module 4 to drive the push-pull synchronization block 402 and the push-pull rod 403 to move, causing the ball control cover 503 to slide within the sliding groove 506, gradually releasing the float 502 in the ball storage seat 501. Under the buoyancy of the mud, the float 502 enters the drill bit center hole 6 and floats to the surface in the mud within the drill bit center hole 6.

[0043] The density of the float 502 is less than the density of the drilling mud in the vertical shaft, which allows the float to float in the drilling mud; the diameter of the float 502 is smaller than the diameter of the drill bit center hole 6, which prevents the floats from being stuck in the drill bit center hole when multiple balls are released at the same time.

[0044] In this embodiment, the extension direction of the ball storage seat 501 is parallel to the central axis of the drill bit center hole 6, that is, one end extends toward the shaft mouth, and the other end extends toward the shaft bottom. The number of the ball sockets 508 is 3, and the ball sockets 508 are arranged along the extension direction of the ball storage seat 501. In the initial state, the ball control cover plate 503 closes the opening of the U-shaped groove on the ball storage seat 501, and each of the ball sockets 508 is embedded with a float 502; when the operation state of the roller cutter is abnormal, the ball control cover plate 503 slides toward the wellhead under the drive of the drive module 4; along the sliding direction of the ball control cover plate 503, the floats 502 embedded in the ball sockets 508 enter the drill bit center hole 6 in sequence. Figure 4 shown.

[0045] In some other embodiments, the extension direction of the ball storage seat 501 may also be perpendicular to the central axis of the drill bit center hole 6.

[0046] The float release module 5 also includes a triangular prism-shaped anti-retention component 505; the anti-retention component 505 is arranged on one end of the ball storage seat 501 adjacent to the shaft wellhead; the prism side of the anti-retention component includes an anti-retention slope 5051, the anti-retention slope 5051 faces the bottom of the shaft, and the distance between the anti-retention slope 5051 and the hole wall of the drill bit center hole 6 gradually decreases from bottom to top; the end of the ball storage seat 501 adjacent to the shaft wellhead passes through the anti-retention slope 5051 and is inserted into the interior of the anti-retention component, as shown in FIG. Figure 3 As shown, the ball socket 508 is located on the bottom wall of the U-shaped groove of the ball storage seat 501, outside the anti-retention component 505. Furthermore, the anti-retention component 505 defines an ear seat passage 507 for the ear seat 504 to pass through. One end of the ear seat passage 507 penetrates the anti-retention slope 5051. When the ball control cover plate 503 slides upward along the sliding groove 506, the ear seat 504 enters the ear seat passage 507.

[0047] like Figure 5 As shown, the ball storage seat 501 has a step 509. The depth of the step 509 is equal to the vertical distance between the ball control cover plate 503 and the non-ball socket area of ​​the bottom wall of the U-shaped groove of the ball storage bin 309. The depth of the ball socket 508 is equal to the radius of the float 502. The vertical distance between the deepest part of the ball socket 508 and the ball control cover plate 503 is greater than the diameter of the float 502 and less than 1.2 times the diameter of the float 502. In this case, the depth of the step 509 is less than the diameter of the float 502, so the float 502 is less likely to get stuck on the step 509 after it escapes from the ball socket 508. In other embodiments, the depth of the ball socket 508 can also be less than the radius of the float 502.

[0048] like Figure 4 As shown, when the cutterhead switches from a normal operating state to a failure state, the sensor module 3 generates and issues a drive control command. After the drive module 4 receives the drive control command, the piston rod of the electric cylinder 401 extends, driving the push-pull rod 403 upward via the push-pull synchronization block 402. Furthermore, the push-pull rod 403 drives the ball control cover plate 503 to slide upward (toward the shaft opening) within the sliding groove 506 via the ear seat 504, and the float 502 located at the bottom of the ball socket 508 is released first. Under the buoyancy of the mud, the float 502 rises rapidly along the drill bit center hole 6 until it reaches the ground.

[0049] The degree of opening of the float chamber is determined by the degree of drill bit jamming and is directly controlled by the ball-control cover plate 503. When the number of jammed drill bits varies, the sensor module 3 issues different drive control commands, which in turn causes the piston rod of the electric cylinder 401 to extend to varying degrees, causing the ball-control cover plate 503 to slide upward within the sliding groove 506 by varying degrees. The more jammed drill bits there are, the greater the upward sliding range of the ball-control cover plate 503 within the sliding groove 506, and the greater the degree of opening of the float chamber.

[0050] Furthermore, when the electric cylinder 401 pulls the ball control cover 503 to its maximum position, all the floats 502 in the ball storage seat 501 are released and enter the drill bit center hole 6. The optimized design of the anti-retention slope 5051 ensures an unobstructed release path for the floats, preventing mud deposition or impurity accumulation from causing float release failure.

[0051] Furthermore, a battery 2 is housed within the housing 1, serving as the core component for powering the system. Battery 2 is electrically connected to the information processor 301 in the sensor module 3 and the electric cylinder 401 in the drive module 4, providing stable power to the information processor 301 and the electric cylinder 401, respectively.

[0052] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the claims of this patent application.

Claims

1. A vertical shaft drilling rig drill bit float signal warning device, characterized in that: include: A box (1), the box (1) being installed in a drill head of a vertical shaft drilling rig and being adjacent to a drill head center hole (6) at the center of the drill head; a roller cutter operation state sensor, the roller cutter operation state sensor being disposed adjacent to the roller cutter on the bottom surface of the drill bit and configured to generate a roller cutter operation state signal according to the operation state of the roller cutter; A sensor module (3), the sensor module (3) is installed in the housing (1), the roller cutter operation state sensor and the sensor module (3) are in communication connection, the sensor module (3) receives and analyzes the roller cutter operation state signal and generates a drive control instruction; A drive module (4), the drive module (4) being arranged in the housing (1), the drive module (4) being communicatively connected to the sensor module (3), the drive module (4) receiving a drive control instruction from the sensor module (3), and driving a float release module (5) to release the float (502) according to the drive control instruction; A float release module (5) is arranged on the outer surface of the housing (1) adjacent to the drill bit center hole (6), and the float release module (5) contains the float (502); the density of the float (502) is less than the density of the drilling mud in the shaft, and the diameter of the float (502) is less than the diameter of the drill bit center hole (6); When the roller cutter is converted from a normal operating state to a failure state, the roller cutter operating state sensor sends a roller cutter operating state signal to the sensor module (3), and the sensor module (3) generates a drive control instruction to control the drive module (4) to drive the float release module (5) to release the float (502), and the float (502) enters the drill bit center hole (6) and floats to the ground in the mud in the drill bit center hole (6).

2. The shaft drilling rig drill bit float signal warning device according to claim 1, characterized in that: The sensor module (3) includes an information processor (301), and the information processor (301) is communicatively connected to the hob operating status sensor.

3. The shaft drilling rig drill bit float signal warning device according to claim 1, characterized in that: The driving module (4) includes an electric cylinder (401), a push-pull synchronization block (402) and a push-pull rod (403), wherein the free end of the piston rod of the electric cylinder (401), the push-pull synchronization block (402) and the push-pull rod (403) are connected in sequence, and the end of the push-pull rod (403) away from the push-pull synchronization block (402) passes through the side wall of the box (1) and extends to the outside of the box (1), and is connected to the float release module (5).

4. The vertical shaft drilling rig drill bit float signal warning device according to claim 3, characterized in that: The base of the electric cylinder (401) is fixedly connected to the box body (1); a push-pull rod seal (12) is provided at the position where the push-pull rod (403) passes through the side wall of the box body (1), and the push-pull rod seal (12) is sleeved on the push-pull rod (403).

5. The vertical shaft drilling rig drill bit float signal warning device according to claim 3, characterized in that: The float release module (5) comprises a ball control cover plate (503) and a ball storage seat (501) for accommodating the float (502); a U-shaped groove is provided on the ball storage seat (501), the opening of the U-shaped groove faces the inner cavity of the drill bit center hole (6); two mutually parallel sliding grooves (506) are machined on the inner wall of the notch position of the U-shaped groove on the ball storage seat (501), and the sliding grooves (506) are arranged along the length direction of the ball storage seat (501); the ball control cover plate (503) is slidably connected to the ball storage seat (501) through the sliding groove (506); one plate surface of the ball control cover plate (503) faces the inner cavity of the ball storage seat (501), and the other plate surface faces the inner cavity of the drill bit center hole (6); an ear seat (504) is provided on the plate surface of the ball control cover plate (503) facing the inner cavity of the drill bit center hole (6), and the push-pull rod (403) is driven and connected to the float release module (5) through the ear seat (504).

6. The vertical shaft drilling rig drill bit float signal warning device according to claim 5, characterized in that: A ball socket (508) for limiting the floating ball (502) is provided on the bottom wall of the U-shaped groove on the ball storage seat (501). The ball socket (508) is a hemispherical depression, and the floating ball (502) is located in the ball socket (508).

7. The shaft drilling rig drill bit float signal warning device according to claim 6, characterized in that: The radius of the open end of the ball socket (508) is greater than the radius of the float (502); the depth of the ball socket (508) is less than or equal to the radius of the float (502); the vertical distance between the deepest part of the ball socket (508) and the ball control cover plate (503) is greater than the diameter of the float (502) and less than 1.2 times the diameter of the float (502).

8. The vertical shaft drilling rig drill bit float signal warning device according to claim 6, characterized in that: One end of the ball storage seat (501) extends toward the shaft opening, and the other end extends toward the shaft bottom; the number of the ball sockets (508) is two or more, and the ball sockets (508) are arranged along the extension direction of the ball storage seat (501).

9. The vertical shaft drilling rig drill bit float signal warning device according to claim 8, characterized in that: The float release module (5) further comprises a triangular prism-shaped anti-retention component (505); the anti-retention component is arranged on one end of the ball storage seat (501) adjacent to the shaft wellhead; the prism side of the anti-retention component (505) comprises an anti-retention slope (5051), the anti-retention slope (5051) faces the bottom of the shaft, and in the direction from the bottom of the shaft to the wellhead, the distance between the anti-retention slope (5051) and the hole wall of the drill bit center hole (6) gradually decreases from bottom to top; one end of the ball storage seat (501) adjacent to the shaft wellhead passes through the anti-retention slope (5051); the ball socket (508) is arranged on the bottom wall of the U-shaped groove of the ball storage seat (501) outside the anti-retention component (505).

10. The vertical shaft drilling rig drill bit float signal warning device according to claim 1, characterized in that: The vertical shaft drilling rig drill bit float signal warning device further comprises a battery (2), wherein the battery (2) is arranged in the box (1), and the battery (2) is electrically connected to the sensor module (3) and the drive module (4) respectively, and the battery (2) supplies power to the sensor module (3) and the drive module (4).

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