Cluster down-the-hole hammer

Abstract

A cluster down-the-hole hammer (100), comprising: a hammer body (1), the hammer body (1) comprising a hammer frame (11) and a plurality of sub-hammers (12), wherein a first cuttings discharge chamber (111) is defined in an inner side of the hammer frame (11), and penetrates along two axial ends of the hammer body (1), the plurality of sub-hammers (12) are spaced apart on the inner side of the hammer frame (11) in the circumferential direction of the hammer frame (11), each sub-hammer (12) is provided with an impact chamber (121), and a first cuttings discharge channel (113) is further provided between two adjacent sub-hammers (12); drill rods (2), each drill rod (2) comprising a drill frame (21), an air supply pipe (22) and cuttings discharge pipes (23), wherein the drill frames (21) are connected to one axial end of the hammer frame (11), a second cuttings discharge chamber (211) is defined in an inner side of each drill frame (21), and is in communication with the first cuttings discharge chamber (111), the air supply pipes (22) are respectively in communication with the impact chambers (121) of the plurality of sub-hammers (12) so as to supply air to the plurality of impact chambers (121), and the cuttings discharge pipes (23) are in one-to-one correspondence and communication with the first cuttings discharge channels (113); and a coring mechanism (3), the coring mechanism (3) being vertically adjustably arranged in the second cuttings discharge chambers (211), so as to remove rock cuttings from the second cuttings discharge chambers (211).

Description

Cluster down-the-hole hammer Technical Field

[0001] The present invention relates to the technical field of pile hole construction machinery, in particular to a cluster-type down-the-hole hammer. Background Art

[0002] At present, when constructing large-diameter pile holes with a diameter exceeding one meter in a tunnel, it is generally impossible to use existing large-scale pile hole equipment such as rotary drilling rigs and long spiral drilling rigs to carry out pile hole construction operations due to the limited height space in the tunnel.

[0003] However, the drill rod of the existing down-the-hole hammer equipment used in pile hole construction adopts a central connection method. This operation method requires the drill rod to be removed and then the rock core to be removed after drilling a certain distance during construction. Continuous drilling is impossible, the process is relatively complicated, and the overall construction efficiency is relatively low.

[0004] Summary of the Invention

[0005] In view of the above problems, the present invention provides a cluster down-the-hole hammer, which can save the operation of pulling the drill rod out of the hole and then coring, thereby drilling to the pile hole depth in one go and improving construction efficiency.

[0006] The present invention provides a cluster down-the-hole hammer, comprising: a hammer body, the hammer body comprising a hammer frame and a plurality of sub-hammers, the inner side of the hammer frame defining a first slag discharge cavity, the first slag discharge cavity penetrating at both ends of the hammer body along an axial direction, the plurality of sub-hammers being arranged on the inner side of the hammer frame at intervals along the circumference of the hammer frame, each of the sub-hammers being provided with an impact cavity, and a first slag discharge channel being provided between two adjacent sub-hammers; a drill rod, the drill rod comprising a drill frame, an air supply pipe and a slag discharge pipe, the drill frame being connected to one end of the hammer frame along an axial direction, the inner side of the drill frame defining a second slag discharge cavity, the second slag discharge cavity being communicated with the first slag discharge cavity, the air supply pipe being respectively communicated with the impact cavities of the plurality of sub-hammers to supply air to the plurality of impact cavities, the slag discharge pipe being in one-to-one correspondence with and communicated with the first slag discharge channel; and a coring mechanism, the coring mechanism being movably arranged in the second slag discharge cavity, the coring mechanism being used to remove rock slag in the second slag discharge cavity.

[0007] The cluster-type down-the-hole hammer of the present invention utilizes a coring mechanism that is movably positioned within the second slag discharge chamber of the drill rod. This allows the coring mechanism to directly extract the core from the second slag discharge chamber during drilling, eliminating the need to remove the drill rod from the hole before coring. This simplifies the coring process and allows the cluster-type down-the-hole hammer to drill to the pile hole depth in a single operation and be disassembled after completion, significantly improving construction efficiency. Furthermore, the cluster-type down-the-hole hammer allows for centralized collection and processing of rock debris, meeting environmental requirements within the tunnel space and achieving a low-consumption, high-efficiency, and safer operation.

[0008] In some embodiments, there is an air distribution chamber at a position adjacent to the drill rod of the hammer rack, the air distribution chamber has an air inlet and multiple air outlets, the air inlet is connected to the air supply pipe, the air outlets correspond one-to-one to the sub-hammers, and each of the air outlets is connected to the impact chamber of the corresponding sub-hammer.

[0009] In some embodiments, the drill rod further includes a first protective plate and a second protective plate, the first protective plate being connected to the drill frame and jointly covering the air supply pipe, and the air supply pipe being fixedly connected to the first protective plate; the second protective plate being connected to the drill frame and jointly covering the slag discharge pipe, and the slag discharge pipe being fixedly connected to the second protective plate.

[0010] In some embodiments, the first protective plate is provided with a first connecting flange at one end of the drill rig facing away from the hammer body along the axial direction, the air supply pipe is provided with a first mating flange, and the first connecting flange and the first mating flange are connected by fasteners; and / or, the second protective plate is provided with a second connecting flange at one end of the drill rig facing away from the hammer body along the axial direction, the slag discharge pipe is provided with a second mating flange, and the second connecting flange and the second mating flange are connected by fasteners.

[0011] In some embodiments, a first seal is provided at one end of the air supply pipe facing the hammer body, the air supply pipe is inserted into the air inlet, and the first seal is clamped between the outer wall of the air supply pipe and the inner wall of the air inlet; and / or, a second seal is provided at one end of the slag discharge pipe facing the hammer body, the slag discharge pipe is inserted into the first slag discharge channel, and the second seal is clamped between the outer wall of the slag discharge pipe and the channel wall of the first slag discharge channel.

[0012] In some embodiments, the drill rod further includes: a core splitting mechanism, which is arranged on the cavity wall of the second slag discharge cavity, and at least part of the structure of the core splitting mechanism is suitable for telescopic movement along the radial direction of the drill frame to split the core in the second slag discharge cavity.

[0013] In some embodiments, the core splitting mechanism includes a driving member and a splitting head. The driving member is fixedly arranged on the cavity wall of the second slag discharge cavity, and the splitting head is connected to the output end of the driving member. The splitting head is suitable for extending and squeezing the core under the drive of the driving member.

[0014] In some embodiments, the coring mechanism includes a coring drill and a caliper, and the coring drill and the caliper are interchangeable, wherein the coring drill is used to remove the complete core from the second slag cavity, and the caliper is used to remove the broken core from the second slag cavity.

[0015] In some embodiments, the ends of the hammer rack and the drill rack facing each other are socketed with each other, and the hammer rack is provided with a plurality of first threaded fixing holes arranged at intervals along its circumference, and the drill rack is provided with second threaded fixing holes corresponding one-to-one to the first threaded fixing holes, and the hammer rack and the drill rack are connected by fasteners passing through the first threaded fixing holes and the second threaded fixing holes in sequence.

[0016] In some embodiments, the hammer frame is provided with a positioning groove axially recessed along the hammer frame on one end edge facing the drill frame, and the inner wall of the drill frame is provided with a positioning key protruding radially inward, and the positioning key is suitable for being clamped into the positioning groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] FIG1 is a schematic structural diagram of a cluster down-the-hole hammer according to an embodiment of the present invention;

[0019] FIG2 is a schematic structural diagram of a hammer body of a cluster down-the-hole hammer according to an embodiment of the present invention;

[0020] FIG3 is a schematic structural diagram of a drill rod of a cluster down-the-hole hammer according to an embodiment of the present invention at one angle;

[0021] FIG4 is a schematic structural diagram of a drill rod of a cluster down-the-hole hammer according to an embodiment of the present invention from another angle;

[0022] FIG5 is a schematic structural diagram of a core drill of a cluster down-the-hole hammer according to an embodiment of the present invention;

[0023] FIG6 is a schematic structural diagram of a caliper of a cluster down-the-hole hammer according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 100-cluster down-the-hole hammer;

[0026] 1- hammer;

[0027] 11- hammer frame; 111- first slag discharge chamber; 112- gas distribution chamber; 113- first slag discharge channel; 114- connecting portion; 115- first threaded fixing hole; 116- positioning groove;

[0028] 12- hammer; 121- impact chamber;

[0029] 2-drill pipe;

[0030] 21-drilling frame; 211-second slag discharge chamber; 212-connecting fitting portion; 213-second threaded fixing hole; 214-positioning key;

[0031] 22-air supply pipe;

[0032] 23-slag discharge pipe; 231-second rotary joint; 232-second matching flange;

[0033] 24-first protective plate;

[0034] 25-second protective plate; 251-second connecting flange;

[0035] 26-core splitting mechanism; 261-driving member; 262-splitting head;

[0036] 3-coring mechanism;

[0037] 31-coring drill; 311-drill body; 312-hanging rope;

[0038] 32-caliper; 321-main bracket; 322-claw; 323-retractable driving member. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] Currently, when constructing large-diameter pile holes (over one meter in diameter) in tunnels, the limited height and space inside the tunnel generally preclude the use of existing large-scale pile drilling equipment, such as rotary drilling rigs and long auger drills. Existing down-the-hole hammer equipment for pile drilling uses a centrally connected drill rod. This requires the drill rod to be removed and the core removed after each drilling advance, preventing continuous drilling and complicating the process, resulting in low overall construction efficiency.

[0041] In view of this, the present invention provides a cluster down-the-hole hammer, which can save the operation of lifting the drill rod out of the hole and then coring, simplifying the coring process, so that the cluster down-the-hole hammer can drill to the pile hole depth in one go and can be disassembled after the construction work is completed, greatly improving construction efficiency.

[0042] The following describes a cluster down-the-hole hammer 100 according to an embodiment of the present invention with reference to FIG1 to FIG6 .

[0043] Specifically, referring to FIG. 1 , the cluster down-the-hole hammer 100 of this embodiment may include: a hammer body 1 , a drill rod 2 and a coring mechanism 3 .

[0044] 1 and 2 , the hammer body 1 may include a hammer frame 11 and a plurality of sub-hammers 12. The hammer frame 11 is in the shape of a hollow cylinder. The inner side of the hammer frame 11 defines a first slag discharge chamber 111. The first slag discharge chamber 111 passes through both ends of the axial direction of the hammer body 1 so that during the drilling process, the core can be discharged upward through the first slag discharge chamber 111. A plurality of sub-hammers 12 are arranged on the inner side of the hammer frame 11 at intervals along the circumference of the hammer frame 11, and each sub-hammer 12 is provided with an impact chamber 121. During the drilling process, the air supply device supplies air into the impact chamber 121, thereby driving the sub-hammer 12 to move axially along the hammer frame 11 to impact and crush the rock formation to achieve the drilling purpose. A first slag discharge channel 113 is also provided between two adjacent sub-hammers 12. The two adjacent sub-hammers 12 can use the first slag discharge channel 113, and the first slag discharge channel 113 and the first slag discharge chamber 111 are in an internal and external partition state. In this way, the rock slag between the two sub-hammers 12 can be discharged upward through the first slag discharge channel 113.

[0045] 1 and 3 , the drill rod 2 may include a drill rig 21, an air supply pipe 22, and a slag discharge pipe 23. The drill rig 21 may also be hollow and cylindrical, and connected to one axial end of the hammer frame 11. For example, the drill rig 21 may be located above the hammer frame 11 and fixedly connected to the upper end of the hammer frame 11. The drill rig 21 may be used to connect to a pipe rolling machine. The rotational torque provided by the pipe rolling machine is transmitted to the hammer body 1 via the drill rod 2, thereby achieving overall rotation and follow-up of the down-the-hole hammer 100. A second slag discharge chamber 211 is defined on the inner side of the drill rig 21. The second slag discharge chamber 211 may be axially connected at both ends, and the second slag discharge chamber 211 is connected to the first slag discharge chamber 111. Thus, the core within the hammer body 1 may be discharged through the first slag discharge chamber 111 and the second slag discharge chamber 211.

[0046] It can be understood that since the length of a single drill rod 2 is limited, the overall length of the cluster down-the-hole hammer 100 can be lengthened by connecting multiple drill rods 2 one by one during the drilling process. In other words, the drill rod 2 can be extended by adding a new section of drill rod 2 as needed during the drilling process, thereby circulating and extending the length. Correspondingly, the air supply pipe 22 and the slag discharge pipe 23 can also be extended by adding new pipe sections, thereby achieving the purpose of the drill rod 2 providing torque, impact power and slag discharge to the hammer body 1.

[0047] The air supply pipe 22 is connected to the impact chambers 121 of the multiple hammers 12 to supply air to the multiple impact chambers 121. It is understood that the air supply pipe 22 can be connected to an external air compression system via an air duct. In this way, high-pressure gas generated by the air compression system can enter the air supply pipe 22 of the drill pipe 2 after passing through the air duct. The air supply pipe 22 then supplies air to the multiple hammers 12 to drive the hammers 12.

[0048] The slag discharge pipe 23 can correspond to the first slag discharge channel 113 one by one and be connected. In this way, the slag in the first slag discharge channel 113 can be discharged through the slag discharge pipe 23. It can be understood that multiple slag discharge pipes 23 can all be connected to the external main slag discharge pipe 23, so as to be connected to the slag dust collector through the main slag discharge pipe 23 to achieve separation of air and rock slag, and then achieve slag discharge.

[0049] The coring mechanism 3 is movably disposed inside the second slag discharge chamber 211. The coring mechanism 3 is adapted to remove the rock core from the second slag discharge chamber 211. That is, during the drilling process, the coring mechanism 3 can directly remove the core from the second slag discharge chamber 211, thereby eliminating the need to remove the drill rod 2 from the hole and then perform coring. This allows the cluster down-the-hole hammer 100 of this embodiment to drill to the pile hole depth in one go and can be disassembled after the construction operation is completed, greatly improving construction efficiency. Furthermore, the centralized collection and processing of rock core can be achieved, meeting the environmental protection requirements of the tunnel space and achieving a low-consumption, high-efficiency, and safer operation method.

[0050] According to the embodiment of the present invention, the cluster down-the-hole hammer 100, by arranging the coring mechanism 3 in a movably arranged manner within the second slag discharge chamber 211 of the drill rod 2, allows the coring mechanism 3 to directly extract the core from the second slag discharge chamber 211 during the drilling process, thereby eliminating the need to remove the core after removing the drill rod 2 from the hole. This simplifies the coring process and enables the cluster down-the-hole hammer 100 to drill to the pile hole depth in one go and then be disassembled after the construction operation is completed, greatly improving construction efficiency. Furthermore, the centralized collection and processing of rock slag can be achieved, meeting the environmental protection requirements of the tunnel space and achieving a low-consumption, high-efficiency, and safer operation method.

[0051] In some embodiments, referring to FIG2 , a gas distribution chamber 112 is provided adjacent to the drill rod 2 in the hammer frame 11. The gas distribution chamber 112 includes an air inlet and multiple air outlets. The air inlet is connected to the air supply pipe 22, and the air outlets correspond one-to-one with each sub-hammer 12. Each air outlet communicates with the impact chamber 121 of the corresponding sub-hammer 12. For example, the gas distribution chamber 112 may extend along the circumference of the hammer frame 11 to form an annular shape. The gas distribution chamber 112 may be located adjacent to the top of the inner wall of the hammer frame 11. The air inlet may be provided on the top wall of the gas distribution chamber 112, and the air outlet may be located on the bottom wall of the gas distribution chamber 112. Furthermore, the multiple air outlets may correspond one-to-one with each sub-hammer 12, so that the air outlets communicate with the impact chamber 121 of the sub-hammer 12. In this manner, the gas distribution chamber 112 can simultaneously distribute driving gas to multiple sub-hammers 12, thereby simplifying the gas supply system of the cluster down-the-hole hammer 100.

[0052] In some embodiments, referring to Figures 3 and 4 , the drill pipe 2 may further include a first protective plate 24 and a second protective plate 25 . The first protective plate 24 may be formed into an arc-shaped structure adapted to the gas supply pipe 22 , or may be a polygonal structure. The first protective plate 24 is connected to the drill rig 21 , and the first protective plate 24 and the drill rig 21 may jointly cover the gas supply pipe 22 to protect the gas supply pipe 22 and prevent it from being squeezed and damaged by the core, thereby ensuring reliable gas supply. The gas supply pipe 22 may be fixedly connected to the first protective plate 24 , for example, by a snap-on connection, a plug-in connection, or a flange connection.

[0053] The second protective plate 25 can be formed into an arc-shaped structure that adapts to the slag discharge pipe 23, or it can also be a polygonal structure. The second protective plate 25 is connected to the drill rig 21. The second protective plate 25 and the drill rig 21 can jointly cover the slag discharge pipe 23, thereby protecting the slag discharge pipe 23 and preventing the slag discharge pipe 23 from being squeezed and damaged by the core. This ensures the airtightness of the slag discharge pipe 23 and facilitates smooth slag discharge. The slag discharge pipe 23 can be fixedly connected to the second protective plate 25, for example, by a clip-on connection, a plug-in connection, or a flange connection.

[0054] In some embodiments, in combination with Figures 3 and 4, the first protective plate 24 is provided with a first connecting flange at one end along the axial direction of the drill rig 21 that is away from the hammer body 1, that is, the top of the first protective plate 24 is provided with a first connecting flange, and the air supply pipe 22 is provided with a first matching flange. The first connecting flange and the first matching flange are connected by fasteners. In this way, the connection between the first protective plate 24 and the air supply pipe 22 is reliable, the stability of the air supply pipe 22 is higher, and it is conducive to stable air supply.

[0055] A second connecting flange 251 is provided at the end of the second protective plate 25, facing away from the hammer body 1, along the axial direction of the drill rig 21. Specifically, the second connecting flange 251 is provided at the top of the second protective plate 25. The slag discharge pipe 23 is provided with a second mating flange 232. The second connecting flange 251 and the second mating flange 232 are connected via fasteners. This ensures a secure connection between the second protective plate 25 and the slag discharge pipe 23, enhancing the stability of the slag discharge pipe 23 and facilitating smooth slag discharge.

[0056] Of course, in other alternative embodiments, both the first connecting flange and the second connecting flange can be replaced with a clamp structure to clamp the air supply pipe 22 and the slag discharge pipe 23 .

[0057] In some embodiments, in combination with Figures 3 and 4, a first rotary joint is provided on the air supply pipe 22. For example, the first rotary joint can be in the shape of a tube with both ends open. The first rotary joint is sleeved on the air supply pipe 22, and the first mating flange can be formed on the side wall of the first rotary joint. In this way, the air supply pipe 22 has a certain amount of movable margin relative to the first rotary joint, which can reduce the pipeline disturbance caused by the rotation of the hammer body 1 and the drill frame 21, and prevent the air supply pipe 22 from rotating due to the vibration of the drill rod 2 or other reasons, thereby ensuring that the air supply is more stable and smooth.

[0058] Correspondingly, a second rotary joint 231 is provided on the slag discharge pipe 23. For example, the second rotary joint 231 can be in the shape of a tube with both ends open. The second rotary joint 231 is sleeved on the slag discharge pipe 23, and the second matching flange 232 can be formed on the side wall of the second rotary joint 231. In this way, the slag discharge pipe 23 has a certain amount of movable margin relative to the second rotary joint 231, which can reduce the pipeline disturbance caused by the rotation of the hammer body 1 and the drill frame 21, and prevent the slag discharge pipe 23 from rotating due to the vibration of the drill rod 2 or other reasons, thereby ensuring that the slag discharge process is more stable and smooth.

[0059] In some possible embodiments, the first rotary joint and the second rotary joint 231 have the same structure, so that the first rotary joint and the second rotary joint 231 have high versatility, facilitate subsequent maintenance, and reduce maintenance costs.

[0060] In some embodiments, a first seal is provided at one end of the air supply pipe 22 facing the hammer body 1 (for example, the lower end of the air supply pipe 22). The first seal can be a sealing ring. The air supply pipe 22 can be inserted into the air inlet, and the first seal is clamped between the outer wall of the air supply pipe 22 and the inner wall of the air inlet. In this way, the air supply pipe 22 and the inner wall of the air inlet of the air distribution cavity 112 constitute a male and female fitting mode. At the same time, the provision of the first seal can ensure the sealing of the connection between the air supply pipe 22 and the air distribution cavity 112, prevent air leakage, and ensure sufficient air pressure to better drive the sub-hammer 12 to operate.

[0061] A second seal is provided at one end of the slag discharge pipe 23 facing the hammer body 1 (for example, the lower end of the slag discharge pipe 23). The second seal can be a sealing ring. The slag discharge pipe 23 can be inserted into the first slag discharge channel 113, and the second seal is clamped between the outer wall of the slag discharge pipe 23 and the channel wall of the first slag discharge channel 113. In this way, the bottom end of the slag discharge pipe 23 and the inner wall of the first slag discharge channel 113 constitute a male and female head matching mode. At the same time, the provision of the second seal can ensure the sealing of the connection between the slag discharge pipe 23 and the first slag discharge channel 113, prevent air leakage, and better perform slag discharge operations.

[0062] In some possible embodiments, the end of the air supply pipe 22 facing the hammer body 1 is provided with a plurality of first sealing grooves, with a plurality of first sealing members corresponding one-to-one to each first sealing groove, and each first sealing member is embedded in a corresponding first sealing groove to ensure the installation stability of the first sealing member. Accordingly, the end of the slag discharge pipe 23 facing the hammer body 1 is provided with a plurality of second sealing grooves, with a plurality of second sealing members corresponding one-to-one to each second sealing groove, and each second sealing member is embedded in a corresponding second sealing groove to ensure the installation stability of the second sealing member.

[0063] In some embodiments, both the first sealing member and the second sealing member may be plastic members. This allows the first sealing member and the second sealing member to have a certain degree of elasticity, thereby improving sealing performance and reducing costs.

[0064] In some embodiments, in conjunction with Figures 1, 3, and 4, the drill rod 2 may further include a core splitting mechanism 26. Specifically, the core splitting mechanism 26 is provided on the wall of the second slag discharge chamber 211. At least a portion of the structure of the core splitting mechanism 26 is adapted to perform telescopic movement along the radial direction of the drill rig 21 to split the core in the second slag discharge chamber 211. For example, when obtaining a complete, unbroken core during equipment operation, it is inconvenient to remove the complete core due to its large weight and volume. Therefore, the force of the core splitting mechanism 26 can be used to break the core to form a smaller core, and then the coring mechanism 3 can be used to perform a broken core coring operation. In this way, the difficulty of coring can be reduced, the coring efficiency can be improved, and the slag removal efficiency can be improved.

[0065] In some embodiments, with reference to Figure 4, the core splitting mechanism 26 may include a driver 261 and a splitting head 262. The driver 261 may be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. Of course, it may also be other driving devices, and the present invention is not limited thereto. The driver 261 is fixedly arranged on the cavity wall of the second slag discharge cavity 211. The end of the splitting head 262 facing the core may be columnar, conical, blade-shaped, or other structures. Of course, the specific structure of the splitting head 262 can be reasonably designed according to actual needs so that the splitting head 262 can apply enough pressure to the core to reduce the difficulty of splitting the core. The splitting head 262 is connected to the output end of the driver 261, and the splitting head 262 is suitable for extending and squeezing the core under the drive of the driver 261. In this way, the structure of the core splitting mechanism 26 is relatively simple and easy to implement.

[0066] In some embodiments, as shown in Figures 5 and 6 , the coring mechanism 3 may include a coring drill 31 and a caliper 32 . The coring drill 31 and the caliper 32 are interchangeable, meaning that one can select either the coring drill 31 or the caliper 32 for coring, depending on the operating conditions. The coring drill 31 is used to remove intact cores from the second slag discharge chamber 211 , while the caliper 32 is used to remove fractured cores from the second slag discharge chamber 211 . This allows the coring mechanism 3 to meet the coring requirements of various core states, helping to improve coring efficiency.

[0067] In some embodiments, referring to Figure 5, the coring drill 31 may include a drill body 311 and a lifting rope 312. The drill body 311 is used to drill into the core and be fixed to the core. The lifting rope 312 is fixedly connected to the drill body 311. The lifting rope 312 is used to pull up the drill body 311 after the core is fixed, thereby removing the core.

[0068] In some embodiments, referring to Figure 6, the caliper 32 may include a main support 321, claws 322 and a retractable drive member 323, wherein there are multiple claws 322, and the multiple claws 322 are evenly spaced along the circumference of the main support 321, and the retractable drive member 323 can correspond to the claws 322 one by one. The multiple claws 322 can be constructed to move synchronously toward the center or synchronously away from the center under the drive of the retractable drive member 323 to clamp the rock core. Alternatively, the multiple claws 322 can be constructed to move independently of each other, so that it is easier to grasp rock blocks with complex shapes.

[0069] In some embodiments, referring to Figures 2 and 3 , the ends of the hammer frame 11 and the drill frame 21 facing each other are interlocked. That is, one of the top end of the hammer frame 11 and the bottom end of the drill frame 21 is inserted into the inner side of the other. For example, the top end of the hammer frame 11 can be inserted into the inner side of the drill frame 21, or the bottom end of the drill frame 21 can be inserted into the inner side of the hammer frame 11. Furthermore, the hammer frame 11 is provided with a plurality of first threaded fixing holes 115, which are spaced apart along the circumference of the hammer frame 11. The drill frame 21 is provided with second threaded fixing holes 213 corresponding to the first threaded fixing holes 115. The hammer frame 11 and the drill frame 21 are connected by fasteners that pass through the first threaded fixing holes 115 and the second threaded fixing holes 213 in sequence. This connection between the hammer frame 11 and the drill frame 21 is simple and reliable, and can effectively transmit torque.

[0070] For example, as shown in Figures 2 and 3 , the top of the hammer frame 11 has a connecting portion 114, and the bottom of the drill frame 21 has a connecting mating portion 212. The outer diameter of the connecting mating portion 212 is smaller than the inner diameter of the connecting portion 114. The connecting mating portion 212 can be inserted into the inner side of the connecting portion 114, and the connecting portion 114 and the connecting mating portion 212 can be interference fit. A plurality of first threaded fixing holes 115 are evenly and spaced apart along the circumference of the hammer frame 11 on the connecting portion 114, and a plurality of second threaded fixing holes 213 are evenly and spaced apart along the circumference of the hammer frame 11 on the connecting mating portion 212. The first threaded fixing holes 115 and the second threaded fixing holes 213 correspond to each other one-to-one. The fastener is a locking nut that can be passed through the first threaded fixing holes 115 and the second threaded fixing holes 213 in sequence to achieve a fixed connection between the hammer frame 11 and the drill frame 21. In this way, the connection is more reliable, and the drill frame 21 can better transmit torque to the hammer frame 11.

[0071] In some embodiments, in combination with Figures 2 and 3, a positioning groove 116 is provided on the edge of one end of the hammer frame 11 facing the drill frame 21. The positioning groove 116 is recessed along the axial direction of the hammer frame 11, and a positioning key 214 is provided on the inner wall of the drill frame 21. The positioning key 214 protrudes radially inwardly along the drill frame 21. For example, the positioning groove 116 can be formed on the upper edge of the connecting portion 114, and the positioning key 214 can be formed on the inner wall of the connecting mating portion 212. The positioning key 214 is suitable for being snapped into the positioning groove 116. In this way, during the connection process of the drill frame 21 and the hammer frame 11, the first threaded fixing hole 115 and the second threaded fixing hole 213 can be quickly aligned to facilitate the rapid connection of the hammer frame 11 and the drill frame 21.

[0072] It can be understood that, referring to Figure 3, since a new section of drill rod 2 needs to be continuously added to the drill rod 2 during the pile hole operation, in order to facilitate the mutual connection of multiple drill rigs 21, a connecting fitting portion 212 can be provided at the bottom end of each drill rig 21, and a connecting portion 114 can be provided at the top end of each drill rig 21. In addition, a positioning groove 116 is provided on the upper edge of the connecting portion 114, and a positioning key 214 is provided on the lower edge of the connecting fitting portion 212. Mutually compatible threaded fixing holes are provided on the connecting portion 114 and the connecting fitting portion 212. In this way, the overall length of the cluster down-the-hole hammer 100 can be conveniently increased to better perform pile hole operations.

[0073] The following describes a construction operation method of a cluster down-the-hole hammer 100 according to an embodiment of the present invention, specifically as follows:

[0074] S1, using a pipe rolling machine to install the cluster down-the-hole hammer 100, and connect the pipeline and other configurations;

[0075] S2, the gas source is turned on, and the pipe rolling machine drives the cluster down-the-hole hammer 100 to perform rock penetration operation;

[0076] S3, after drilling one section of the drill rod 2, the core that cannot be broken is broken by using the core splitting mechanism 26, and then the caliper 32 or the coring drill 31 is used to perform a coring operation to remove the core;

[0077] S4, after taking out the core, the pipeline is disassembled, a new section of drill pipe 2 is installed, the pipeline is reconnected, and the drilling and coring process is repeated until the required drilling depth is reached;

[0078] S5, after drilling and coring are completed, the drill rod 2 and the hammer body 1 are disassembled in sequence in the reverse order of their installation.

[0079] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0080] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0081] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0082] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A clustered down-the-hole hammer, characterized in that, Comprising: A hammer body, the hammer body includes a hammer frame and a plurality of sub - hammers. An inner side of the hammer frame defines a first slag discharge cavity, both ends of the first slag discharge cavity along the axial direction of the hammer body are through, and the plurality of sub - hammers are arranged at intervals along the circumferential direction of the hammer frame on the inner side of the hammer frame. Each sub - hammer is provided with an impact cavity, and a first slag discharge channel is further provided between two adjacent sub - hammers; A drill pipe, the drill pipe includes a drill frame, an air supply pipe and a slag discharge pipe. One end of the drill frame along the axial direction is connected to the hammer frame. An inner side of the drill frame defines a second slag discharge cavity, and the second slag discharge cavity is communicated with the first slag discharge cavity. The air supply pipe is respectively communicated with the impact cavities of the plurality of sub - hammers to supply air to the plurality of impact cavities, and the slag discharge pipe is in one - to - one correspondence and communication with the first slag discharge channel; A core - taking mechanism, the core - taking mechanism is arranged in the second slag discharge cavity in a liftable manner, and the core - taking mechanism is used to take out the rock slag in the second slag discharge cavity.

2. The clustered down-the-hole hammer according to claim 1, wherein, There is an air distribution cavity at a position of the hammer frame adjacent to the drill pipe. The air distribution cavity has an air inlet and a plurality of air outlets. The air inlet is connected to the air supply pipe, the air outlets correspond to the sub - hammers one by one, and each air outlet is communicated with the impact cavity of the corresponding sub - hammer.

3. The clustered down-the-hole hammer according to claim 2, characterized in that, The drill pipe further includes a first protective plate and a second protective plate, The first protective plate is connected to the drill frame and jointly covers the air supply pipe, and the air supply pipe is fixedly connected to the first protective plate; The second protective plate is connected to the drill frame and jointly covers the slag discharge pipe, and the slag discharge pipe is fixedly connected to the second protective plate.

4. The clustered down-the-hole hammer according to claim 3, wherein, The first protective plate is provided with a first connection flange at one end along the axial direction of the drill frame facing away from the hammer body. The air supply pipe is provided with a first mating flange, and the first connection flange and the first mating flange are connected by fasteners; and / or, The second protective plate is provided with a second connection flange at one end along the axial direction of the drill frame facing away from the hammer body. The slag discharge pipe is provided with a second mating flange, and the second connection flange and the second mating flange are connected by fasteners.

5. The clustered down-the-hole hammer according to claim 3, wherein, One end of the air supply pipe facing the hammer body is provided with a first seal. The air supply pipe is inserted into the air inlet, and the first seal is clamped between the outer wall of the air supply pipe and the inner wall of the air inlet; and / or, One end of the slag discharge pipe facing the hammer body is provided with a second seal. The slag discharge pipe is inserted into the first slag discharge channel, and the second seal is clamped between the outer wall of the slag discharge pipe and the channel wall of the first slag discharge channel.

6. The clustered down-the-hole hammer according to any one of claims 1-5, characterized in that, The drill pipe further includes: A core splitting mechanism, the core splitting mechanism is arranged on the wall of the second slag discharge cavity. At least part of the structure of the core splitting mechanism is adapted to perform telescopic movement along the radial direction of the drill frame to split the core in the second slag discharge cavity.

7. The clustered down-the-hole hammer according to claim 6, characterized in that, The core splitting mechanism includes a driving member and a splitting head. The driving member is fixedly arranged on the wall of the second slag discharge cavity, the splitting head is connected to the output end of the driving member, and the splitting head is adapted to extend and squeeze the core under the drive of the driving member.

8. The clustered down-the-hole hammer according to any one of claims 1-5, characterized in that, The core-taking mechanism includes a core drill and a caliper, the core drill and the caliper being interchangeable. Among them, the core drill is used to take out a complete core from the second slag discharge cavity, and the caliper is used to take out a broken core from the second slag discharge cavity.

9. The clustered down-the-hole hammer according to any one of claims 1-5, characterized in that One end of the hammer frame and the drill frame facing each other are sleeved with each other. Moreover, a plurality of first threaded fixing holes are arranged at intervals along the circumferential direction of the hammer frame, and second threaded fixing holes corresponding to the first threaded fixing holes one by one are arranged on the drill frame. The hammer frame and the drill frame are connected by fasteners passing through the first threaded fixing holes and the second threaded fixing holes in sequence.

10. The clustered down-the-hole hammer according to claim 9, characterized in that, A positioning groove recessed axially along the hammer frame is provided at the edge of one end of the hammer frame facing the drill frame, and a positioning key protruding radially inward is provided on the inner wall of the drill frame. The positioning key is adapted to be inserted into the positioning groove.

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