Drill rod position sensing device, drill rod warehouse with same and down-the-hole drill

Abstract

A drill rod position sensing device comprises a driving assembly and a rotary encoder which are arranged in a drill rod warehouse. The driving assembly is used for driving the drill rod to move in the warehouse. The rotary encoder comprises an encoder shell, a rotating shaft, a detection light source, an encoding disc and an optical detector. The rotating shaft is in transmission connection with the driving assembly and penetrates into the encoder shell, the encoding disc is fixed on the rotating shaft, and the encoding disc and the optical detector are sequentially arranged on an emergent light path of the detection light source. When the driving assembly drives the drill rod to move, the rotating shaft drives the coding disc to rotate, light emitted by the light source penetrates through the coding disc, and continuously-changing optical detection signals are generated. The optical detector obtains an optical detection signal and determines the position of the drill rod in the warehouse according to the signal. According to the drill rod position sensing device, the rotary encoder is used, so that the drill rod position sensing device can be suitable for various environments, and the measurement precision of the rotation angle of the drill rod library chuck is improved. The utility model further discloses a drill pipe warehouse with the device and a down-the-hole drill.

Description

Technical Field

[0001] The present application relates to the field of mining equipment, and particularly to a drill pipe position sensing device, a drill pipe storage rack, and a down-the-hole drill rig having the device. Background Art

[0002] A down-the-hole drill rig is a drilling equipment that drives a drill bit underground by using compressed air to perform efficient drilling operations.

[0003] As an open-pit drilling equipment, a down-the-hole drill rig usually needs to drill holes dozens of meters deep, and multiple drill pipes are required for each hole. Therefore, the storage and handling operations of drill pipes are crucial for the working efficiency of the down-the-hole drill rig. During the handling operations, the chuck of the drill pipe storage rack rotates with the shaft to accurately rotate the drill pipe to the handling position, thereby realizing a smooth handling process. If the handling position is inaccurate, it may lead to failure or even dropping of the drill pipe during handling, causing equipment damage and safety hazards.

[0004] Currently, the handling position of the drill pipe is usually controlled by a proximity switch, and the rotation angle of the chuck of the drill pipe storage rack is adjusted to accurately identify the position of the drill pipe. However, based on the principle of electromagnetic induction, the proximity switch is susceptible to magnetic field interference and may fail, especially in an iron ore environment. In addition, the induction distance of the proximity switch is short, and its induction characteristics are non-linear, and it is prone to a jerky feeling when suddenly stopping, resulting in equipment vibration. Summary of the Utility Model

[0005] The purpose of the present application is to provide a drill pipe position sensing device, a drill pipe storage rack, and a down-the-hole drill rig having the device, which can improve the accuracy of the rotation angle of the chuck of the drill pipe storage rack and enable the down-the-hole drill rig to accurately control the handling position of the drill pipe in an extremely strong magnetic field environment.

[0006] The present application provides a drill pipe position sensing device for sensing the position of a drill pipe of a down-the-hole drill rig in a drill pipe storage rack. The drill pipe position sensing device includes: a driving component in the drill pipe storage rack for driving the drill pipe to move in the drill pipe storage rack; a rotary encoder disposed in the drill pipe storage rack, including an encoder housing, a rotating shaft, a detection light source, a code disk, and an optical detector disposed in the encoder housing. The rotating shaft is in transmission connection with the driving component and penetrates into the encoder housing. The code disk is fixed on the rotating shaft, and the code disk and the optical detector are sequentially disposed on the outgoing light path of the detection light source. When the driving component drives the drill pipe to move, the code disk is driven to rotate relative to the detection light source through the rotating shaft, so that the light emitted by the detection light source passes through the rotating code disk to generate a continuously changing optical detection signal. The optical detector is used to acquire the optical detection signal and determine the position of the drill pipe in the drill pipe storage rack according to the optical detection signal.

[0007] Further, the drill pipe position sensing device further includes a transmission assembly, and the transmission assembly includes a first transmission unit and a second transmission unit; the driving assembly includes a power source and a driving shaft driven by the power source, and the driving shaft is in transmission connection with the rotating shaft via the first transmission unit and the second transmission unit.

[0008] Further, the first transmission unit includes a coupling, and the second transmission unit includes a driving shaft connecting plate, a backing plate and a coupling connecting plate. The driving shaft connecting plate is detachably installed on the top of the backing plate, and the driving shaft connecting plate is provided with a first connecting hole for transmission connection with the driving shaft. The coupling connecting plate is fixed to the bottom of the backing plate and is in transmission connection with the coupling.

[0009] Further, a first groove is formed on one side of the coupling connecting plate adjacent to the rotating shaft, and a clamping key is formed in the first groove. A second groove is formed at one end of the rotating shaft where it abuts against the first groove, and the clamping key is inserted into the second groove, thereby forming a clamping structure between the coupling connecting plate and the rotating shaft.

[0010] Further, the code disk includes a detection track, and the detection track includes a light-shielding portion and a transparent portion. When the code disk rotates, the light-shielding portion and the transparent portion respectively pass through the outgoing light path of the detection light source, so that the optical detector can detect the blocking and passing of the light beam emitted by the detection light source, thereby generating an optical detection signal.

[0011] Further, the drill pipe position sensing device includes a plurality of the optical detectors, and a certain included angle is provided between the plurality of optical detectors, so as to generate a plurality of detection signals with different phases, thereby enhancing the measurement accuracy of the drill pipe position sensing device.

[0012] Further, the drill pipe position sensing device further includes a support plate, the support plate is provided with a fixing hole, the rotating shaft is rotatably inserted into the fixing hole, the top of the encoder housing is fixed on the support plate, and the drill pipe position sensing device further includes a first protective cover covering the outside of the rotary encoder housing. The first protective cover includes a first surrounding plate and a bottom plate. The first surrounding plate is in the shape of an arc-shaped bent plate, and one arc-shaped edge of it is fixedly connected to the support plate, and the bottom plate is fixedly connected to the arc-shaped edge on the other side of the first surrounding plate.

[0013] Further, the drill pipe position sensing device further includes a second protective cover covering the outside of the second transmission unit and the rotating shaft. The second protective cover includes a second surrounding plate with a generally arc shape, and the bottom edge of the second surrounding plate is fixedly connected to the support plate.

[0014] The present application also provides a drill pipe library, including the above-mentioned drill pipe position sensing device. The chuck is in transmission connection with the driving component and is used to fix the drill pipe. When the driving component drives the chuck and the drill pipe to move, the encoder disk is driven to rotate relative to the detection light source through a rotating shaft, so that the light emitted by the detection light source passes through the rotating encoder disk to generate a continuously changing optical detection signal. The optical detector is used to obtain the optical detection signal and determine the position of the drill pipe in the drill pipe library according to the optical detection signal.

[0015] The present application also provides a down-the-hole drill, including the above-mentioned drill pipe library and at least one drill pipe. The drill pipe is detachably fixed in the chuck of the drill pipe library.

[0016] The drill pipe position sensing device provided by the present application can be applied to a variety of environments by using a rotary encoder. Compared with a proximity switch, the rotary encoder of the drill pipe position sensing device provided by the present application can provide continuous position information through real-time optical detection, ensuring that the position can be accurately controlled at each moment during the movement of the drill pipe, thereby improving the response speed and measurement accuracy of the rotation angle of the chuck of the drill pipe library. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structure schematic diagram of a drill pipe position sensing device provided by an embodiment of the present application.

[0018] Figure 2 For Figure 1 It is a cross-sectional structure schematic diagram of the rotary encoder in the drill pipe position sensing device shown.

[0019] Figure 3 For Figure 1 It is a top view cross-sectional schematic diagram of the rotary encoder in the drill pipe position sensing device shown.

[0020] Figure 4 For Figure 1 It is a three-dimensional structure schematic diagram of the drive shaft connecting plate in the second transmission unit in the drill pipe position sensing device shown.

[0021] Figure 5 For Figure 1 It is a three-dimensional structure schematic diagram of the backing plate in the second transmission unit in the drill pipe position sensing device shown.

[0022] Figure 6 For Figure 1 It is a three-dimensional structure schematic diagram of the coupling connecting plate in the second transmission unit in the drill pipe position sensing device shown.

[0023] Figure 7 For Figure 1 It is a three-dimensional structure schematic diagram of the drill pipe position sensing device shown.

[0024] Figure 8 Schematic three-dimensional structure diagram of the drill pipe library provided for an embodiment of the present application.

[0025] Figure 9 For Figure 8 Schematic top view cross-sectional structure diagram of the middle chuck.

[0026] Figure 10 Schematic cross-sectional structure diagram of the down-the-hole drill provided for an embodiment of the present application. Specific embodiments

[0027] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0028] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0029] Please refer Figures 1 to 10 , in an embodiment of the present application, the drill pipe position sensing device 100 includes a driving assembly 10 arranged in the drill pipe library for driving the drill pipe 70 to move in the drill pipe library; a rotary encoder 20 arranged in the drill pipe library, including an encoder housing 21, a rotating shaft 22, and a detection light source 23, a coding disk 24, and an optical detector 25 arranged in the encoder housing. The rotating shaft 22 is in transmission connection with the driving assembly 10 and penetrates into the encoder housing 21. The coding disk 24 is fixed on the rotating shaft 22, and the coding disk 24 and the optical detector 25 are sequentially arranged on the outgoing light path of the detection light source 23. When the driving assembly 10 drives the drill pipe 70 to move, the coding disk 24 is driven by the rotating shaft 22 to rotate relative to the detection light source 23, so that the light emitted by the detection light source 23 passes through the rotating coding disk 24 to generate a continuously changing optical detection signal. The optical detector 25 is used to acquire the optical detection signal and determine the position of the drill pipe 70 in the drill pipe library according to the optical detection signal.

[0030] Specifically, one end of the rotating shaft 22 penetrates through the encoder housing 21 and extends to the inside of the rotary encoder 20. The coding disk 24 is sleeved on the rotating shaft 22 and is in transmission connection with the rotating shaft 22. The other end of the rotating shaft 22 is in transmission connection with the driving assembly 10. The coding disk 24 is located between the detection light source 23 and the optical detector 25. The detection light source 23 is fixed above the coding disk 24 and aligned with the coding disk 24. The optical detector 25 is fixed below the coding disk 23 and aligned with the coding disk 24.

[0031] The drill pipe position sensing device 100 further includes a transmission assembly 30, and the transmission assembly 30 includes a first transmission unit 31 and a second transmission unit 32; the driving assembly 10 includes a power source 11 and a driving shaft 12 driven by the power source 11, and the driving shaft 12 is in transmission connection with the rotating shaft 22 via the first transmission unit 31 and the second transmission unit 32.

[0032] Specifically, the rotating shaft 22 is in transmission connection with the first transmission unit 31, the driving shaft 12 is in transmission connection with the second transmission unit 32, the first transmission unit 31 is located below the second transmission unit 32 and the first transmission unit 31 abuts against the second transmission unit 32, and the driving shaft 12 transmits torque to the rotating shaft 22 through the transmission assembly 30, thereby driving the rotating shaft 22 to rotate, that is, the other end of the rotating shaft 22 is in transmission connection with the driving assembly 10 through the transmission assembly 30.

[0033] The first transmission unit 31 includes a coupling 311, and the second transmission unit 32 includes a driving shaft connecting plate 321, a backing plate 322 and a coupling connecting plate 323. The driving shaft connecting plate 321 is detachably installed on the top of the backing plate 322, and the driving shaft connecting plate 321 is provided with a first connection hole 321A for transmission connection with the driving shaft 12. The coupling connecting plate 323 is fixed to the bottom of the backing plate 322 and is in transmission connection with the coupling 311.

[0034] Specifically, the driving shaft connecting plate 321 is circular, and two first connection holes 321A are provided along the axial direction of the driving shaft connecting plate 321. The driving shaft connecting plate 321 is used to penetrate bolts through the first connection holes 321A, so that the driving shaft connecting plate 321 is in transmission connection with the driving shaft 12. The backing plate 322 is circular, and its diameter is the same as that of the driving shaft connecting plate 321. An oval through hole 322A is formed inside it for accommodating the bolt head of the bolt penetrating through the first connection hole 321A. The coupling connecting plate 323 is circular, and its diameter is the same as that of the driving shaft connecting plate 321.

[0035] Further, different driving shaft connecting plates 321 can be replaced according to different sizes of the driving shaft 12.

[0036] A first groove 323A is provided on one side of the coupling connecting plate 323 adjacent to the rotating shaft 22, and a clamping key 323B is formed in the first groove 323A. A second groove 221 is provided at one end of the rotating shaft 22 where it abuts against the first groove 321A, and the clamping key 323B is inserted into the second groove 221, thereby forming a clamping structure between the coupling connecting plate 323 and the rotating shaft 22.

[0037] Specifically, a first groove 323A matching the diameter of the end of the rotating shaft 22 is provided at the abutting position of the coupling connecting plate 323 and the end of the rotating shaft 22, and the size of the second groove 221 matches that of the clamping key 323B.

[0038] Furthermore, a second connection hole 321B is formed along the axial direction at the edge of the drive shaft connection plate 321, a third connection hole 322B corresponding to the position of the second connection hole 321B is formed along the axial direction at the edge of the backing plate 322, and a fourth connection hole 323C corresponding to the position of the second connection hole 321B is formed along the axial direction at the edge of the coupling connection plate 323. Bolts pass through the second connection hole 321B, the third connection hole 322B, and the fourth connection hole 323C for fixedly connecting the drive shaft connection plate 321, the backing plate 322, and the coupling connection plate 323.

[0039] The code disk 24 includes a detection track 241. The detection track 241 includes a light-shielding portion 241A and a transparent portion 241B. When the code disk 24 rotates, the light-shielding portion 241A and the transparent portion 241B respectively pass through the outgoing light path of the detection light source 23, so that the optical detector 25 can detect the blocking and passing of the light beam emitted by the detection light source 23, thereby generating an optical detection signal.

[0040] Specifically, the detection track 241 is annular, and the light-shielding portion 241A and the transparent portion 241B are alternately distributed to form a fine grid pattern. The widths of each light-shielding portion 241A and transparent portion 241B are equal to ensure that the detection light source 23 generates regular optical signals during the rotation of the code disk 24. When the code disk 24 rotates, the light-shielding portion 241A blocks the light beam of the detection light source 23, resulting in the optical detector 25 not receiving a light signal; while the transparent portion 241B allows the light beam to pass through, and the optical detector 25 receives a strong light signal. The optical detector 25 converts these light signals into electrical signals to form a pulse sequence, and the frequency and phase of this pulse sequence reflect the rotation speed and direction of the code disk 24.

[0041] The drill pipe position sensing device 100 includes a plurality of optical detectors 25, and there is a certain included angle between the plurality of optical detectors 25, thereby generating detection signals with different phases, and further enhancing the measurement accuracy of the drill pipe position sensing device 100.

[0042] Specifically, in this embodiment, the number of optical detectors 25 is four, and the included angle between the four optical detectors 25 is set to 90 degrees to ensure a comprehensive detection of the position of the drill pipe 70.

[0043] Furthermore, due to the included angle between the plurality of optical detectors 25, the detection signals generated by them have different phases. By precisely calculating these phase differences, more precise position information can be obtained.

[0044] The drill rod position sensing device 100 also includes a support plate 40, which is provided with a fixing hole 41, and the rotating shaft is rotatably inserted into the fixing hole 41. The top of the encoder housing 21 is fixed on the support plate 40. The drill rod position sensing device 100 also includes a first protective cover 50 that is covered on the outside of the rotary encoder housing 21. The first protective cover 50 includes a first enclosure 51 and a bottom plate 52. The first enclosure 51 is in the shape of an arc-shaped bent plate, and the arc-shaped edge on one side is fixedly connected to the support plate 40, and the bottom plate 52 is fixedly connected to the arc-shaped edge on the other side of the first enclosure 51.

[0045] Specifically, the support plate 40 is made of high-strength steel to ensure that it can withstand the load of the drill rod 70 and the drill rod position sensing device 100 during operation and has sufficient rigidity and stability. The top of the encoder housing 21 is fixed to the support plate 40 by bolts. The first shield 50 is used to protect the rotary encoder 20 to prevent dust, dirt and other impurities from entering. The first shield 50 is made of high-strength, corrosion-resistant material. In this embodiment, the first shield 50 is preferably stainless steel to adapt to harsh working environments.

[0046] The drill rod position sensing device 100 further includes a second shield 60 disposed outside the second transmission unit 32 and the rotating shaft 22. The second shield 60 includes a second enclosure 61 that is substantially arc-shaped, which enhances the structural strength of the second shield 60, wherein the arc-shaped design can effectively disperse external impact forces and prevent damage caused by accidental collisions. The bottom edge of the second enclosure 61 is fixedly connected to the support plate 40.

[0047] Another embodiment of the present application also provides a drill rod magazine 200, including a chuck 210 and the above-mentioned drill rod position sensing device 100. The chuck 210 is transmission-connected to the drive assembly 10 and is used to fix the drill rod 70. When the drive assembly 10 drives the chuck 210 and the drill rod 70 to move, the encoder disk 24 is driven by the rotating shaft 22 to rotate relative to the detection light source 23, so that the light emitted by the detection light source 23 passes through the rotating encoder disk 24 to generate a continuously changing optical detection signal. The optical detector 25 is used to obtain the optical detection signal and determine the position of the drill rod 70 in the drill rod magazine 200 according to the optical detection signal.

[0048] Specifically, the chuck 210 is sleeved on the drive shaft 12 and is in driving connection with the drive shaft 12. The chuck 210 is provided with a plurality of notches 211 spaced apart along its circumferential direction for clamping the drill rod 70. When the drive assembly 10 is running, the drive shaft drives the chuck 210 and the drill rod 70 fixed in the chuck 210 to move synchronously.

[0049] According to another aspect of the present application, a down-the-hole drilling rig 300 is provided, comprising the above-mentioned drill rod magazine 200 and at least one drill rod 70 , wherein the drill rod 70 is detachably fixed in a chuck 210 of the drill rod magazine 200 .

[0050] Specifically, the drill pipe library 200 further includes a protective cover body 220. The protective cover body 220 includes a circumferentially extending annular protective wall 221 and a bottom wall 222 provided at the bottom end of the annular protective wall 221. Among them, the annular protective wall 221 is used to provide comprehensive protection for the internal drill pipe 70, and the bottom wall 222 provides stable support for the drill pipe library 200. The annular protective wall 221 includes an opening for the drill pipe 70 to enter and exit the drill pipe library 200.

[0051] Furthermore, the down-the-hole drill 300 further includes a clamping mechanism 310 adjacent to the opening for clamping the drill pipe 70 to enter and exit the drill pipe library 200. The clamping mechanism 310 ensures the stability of the drill pipe 70 during movement, avoids possible shaking and deviation, and improves the operation accuracy and safety.

[0052] The driving assembly 10 drives the drill pipe to move in the drill pipe library through the transmission-connected rotating shaft 22, and at the same time drives the code disc 24 fixed on the rotating shaft 22 to rotate. The detection light source in the rotary encoder 20 emits a light beam, and the light beam passes through the rotating code disc 24 to generate a continuously changing optical detection signal. The optical detector 25 monitors the optical signal in real time and accurately calculates the current position and rotation angle of the drill pipe 70 in the drill pipe library 200 through the signal change. When the drill pipe 70 moves to the opening of the drill pipe library 200, the clamping mechanism 310 ensures that the drill pipe 70 enters and exits the drill pipe library 200 stably. The drill pipe 70 successfully completes the operation of entering and exiting the drill pipe library 200 under the monitoring of the optical detector, ensuring the accurate position and safe operation of the drill pipe 70.

[0053] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A drill rod position sensing device for sensing the position of a drill rod of a down-the-hole drilling rig in a drill rod storage, characterized in that: The drill rod position sensing device comprises: A driving assembly arranged in the drill rod magazine, used for driving the drill rods to move in the drill rod magazine; A rotary encoder arranged in a drill rod storehouse comprises an encoder housing, a rotating shaft, and a detection light source, a code disc, and an optical detector arranged in the encoder housing; the rotating shaft is drivingly connected to the driving assembly and penetrates into the encoder housing; the code disc is fixed on the rotating shaft, and the code disc and the optical detector are sequentially arranged on the exit light path of the detection light source; when the driving assembly drives the drill rod to move, the code disc is driven to rotate relative to the light source through the rotating shaft, so that the light emitted by the light source passes through the rotating code disc to generate a continuously changing optical detection signal; the optical detector is used to obtain the optical detection signal and determine the position of the drill rod in the drill rod storehouse according to the optical detection signal; The drill rod position sensing device also includes a transmission assembly, which includes a first transmission unit and a second transmission unit; the drive assembly includes a power source and a drive shaft driven by the power source, and the drive shaft is connected to the rotating shaft via the first transmission unit and the second transmission unit.

2. The drill rod position sensing device according to claim 1, characterized in that: The first transmission unit includes a coupling, and the second transmission unit includes a drive shaft connecting plate, a pad and a coupling connecting plate. The drive shaft connecting plate is detachably mounted on the top of the pad, and the drive shaft connecting plate is provided with a first connecting hole for transmission connection with the drive shaft, and the coupling connecting plate is fixed to the bottom of the pad and transmission connected with the coupling.

3. The drill rod position sensing device according to claim 2, characterized in that: A first groove is formed on one side of the coupling connecting plate adjacent to the rotating shaft, a locking key is formed in the first groove, a second groove is formed at one end of the rotating shaft where it abuts the first groove, and the locking key is inserted into the second groove, thereby forming a locking structure between the coupling connecting plate and the rotating shaft.

4. The drill rod position sensing device according to claim 1, characterized in that: The encoding disk includes a detection track, and the detection track includes a light-shielding portion and a transparent portion. When the encoding disk rotates, the light-shielding portion and the transparent portion respectively pass through the exit light path of the detection light source, so as to enable the optical detector to detect the blocking and passage of the light beam emitted by the detection light source, thereby generating an optical detection signal.

5. The drill rod position sensing device according to claim 4, characterized in that: The drill rod position sensing device includes a plurality of optical detectors and a certain angle is set between the plurality of optical detectors, thereby generating a plurality of detection signals with different phases, thereby enhancing the measurement accuracy of the drill rod position sensing device.

6. The position sensing device according to claim 1, characterized in that: The drill rod position sensing device further comprises a support plate, the support plate is provided with a fixing hole, the rotating shaft is rotatably inserted into the fixing hole, and the top of the encoder housing is fixed on the support plate.

7. The position sensing device according to claim 6, characterized in that: The drill rod position sensing device also includes a first protective cover arranged outside the rotary encoder housing, the first protective cover includes a first enclosure and a bottom plate, the first enclosure is in the shape of an arc-shaped bent plate, and the arc-shaped edge on one side is fixedly connected to the support plate, and the bottom plate is fixedly connected to the arc-shaped edge on the other side of the first enclosure.

8. The drill rod position sensing device according to claim 6, characterized in that: The drill rod position sensing device also includes a second shield disposed outside the second transmission unit and the rotating shaft, the second shield includes a second enclosure plate that is substantially arc-shaped, and the bottom edge of the second enclosure plate is fixedly connected to the support plate.

9. A drill rod magazine, characterized in that: It comprises a chuck and a drill rod position sensing device as described in any one of claims 1 to 8, wherein the chuck is transmission-connected to the drive assembly and is used to fix the drill rod, and when the drive assembly drives the chuck and the drill rod to move, the code disk is driven to rotate relative to the detection light source via a rotating shaft, so that the light emitted by the detection light source passes through the rotating code disk to generate a continuously changing optical detection signal, and the optical detector is used to obtain the optical detection signal and determine the position of the drill rod in the drill rod library according to the optical detection signal.

10. A down-the-hole drilling rig, characterized in that: The drill rod magazine comprises the drill rod magazine as claimed in claim 9 and at least one drill rod, wherein the drill rod is detachably fixed in the chuck of the drill rod magazine.

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