Clustered down-the-hole hammer

Abstract

This invention provides a clustered down-the-hole hammer, comprising: a hammer body, including a hammer frame and multiple sub-hammers; a first slag removal chamber defined on the inner side of the hammer frame, the first slag removal chamber extending through both ends along the axial direction of the hammer body; multiple sub-hammers arranged circumferentially on the inner side of the hammer frame, each sub-hammer having an impact chamber; and a first slag discharge channel between adjacent sub-hammers; a drill rod, including 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 the axial direction; a second slag removal chamber defined on the inner side of the drill frame, the second slag removal chamber communicating with the first slag removal chamber; the air supply pipe communicating with the impact chambers of the multiple sub-hammers to supply air to the multiple impact chambers; and the slag discharge pipe corresponding to and communicating with the first slag discharge channel; and a core sampling mechanism, movably disposed in the second slag removal chamber to remove rock cuttings from the second slag removal chamber. According to this invention, the clustered down-the-hole hammer simplifies the core sampling process, allows drilling to the pile hole depth in one go, and improves construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of pile hole construction machinery technology, and in particular to a cluster-type down-the-hole hammer. Background Technology

[0002] Currently, when constructing large-diameter pile holes exceeding one meter in diameter inside tunnels, the limited height space within the tunnel generally prevents the use of existing rotary drilling rigs, long spiral drilling rigs, and other large pile hole equipment for the pile hole construction operation.

[0003] The existing down-the-hole hammer equipment used for pile hole construction uses a center connection method for the drill rod. This method requires the drill rod to be removed after drilling a certain distance, and then the rock core must be taken out. This makes continuous drilling impossible, the process is complicated, and the overall construction efficiency is relatively low. Summary of the Invention

[0004] In view of the above problems, the present invention provides a clustered down-the-hole hammer, which can eliminate the operation of pulling the drill rod out of the hole and then taking the core, thereby drilling to the pile hole depth in one go and improving construction efficiency.

[0005] This invention provides a clustered down-the-hole hammer, comprising: a hammer body, the hammer body including a hammer frame and multiple sub-hammers, the inner side of the hammer frame defining a first slag discharge chamber, the first slag discharge chamber extending through both ends along the axial direction of the hammer body, the multiple sub-hammers being arranged circumferentially at intervals along the inner side of the hammer frame, each sub-hammer having an impact chamber, and a first slag discharge channel between adjacent two sub-hammers; a drill rod, the drill rod including 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 the axial direction, the inner side of the drill frame defining a second slag discharge chamber, the second slag discharge chamber communicating with the first slag discharge chamber, the air supply pipe communicating with the impact chambers of the multiple sub-hammers respectively to supply air to the multiple impact chambers, the slag discharge pipe corresponding to and communicating with the first slag discharge channel; and a core sampling mechanism, the core sampling mechanism being vertically and vertically disposed in the second slag discharge chamber, the core sampling mechanism being used to remove rock cuttings from the second slag discharge chamber.

[0006] According to the present invention, the clustered down-the-hole hammer, by movably and height-mounting the core sampling mechanism in the second cuttings outlet chamber of the drill rod, allows the core sampling mechanism to directly extract the rock core from the second cuttings outlet chamber during drilling. This eliminates the need to remove the drill rod from the hole before core sampling, simplifying the core sampling process. The clustered down-the-hole hammer can drill to the pile hole depth in one go, and disassembly can be performed after the construction work is completed, greatly improving construction efficiency. Furthermore, it enables centralized collection and processing of rock cuttings, meeting the environmental protection requirements of tunnel space, and achieving a low-consumption, high-efficiency, and safer operating method.

[0007] In some embodiments, the hammer frame has an air distribution chamber near the drill rod. The air distribution chamber has an air inlet and multiple air outlets. The air inlet is connected to the air supply pipe, and the air outlets correspond one-to-one with the sub-hammers. Each air outlet is connected to the impact chamber of the corresponding sub-hammer.

[0008] In some embodiments, the drill rod further includes a first protective plate and a second protective plate. The first protective plate is connected to the drill frame and together 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 together covers the slag discharge pipe, and the slag discharge pipe is fixedly connected to the second protective plate.

[0009] In some embodiments, the first protective plate is provided with a first connecting flange at one end opposite to the hammer body along the axial direction of the drill frame, and the air supply pipe is provided with a first mating flange, the first connecting flange and the first mating flange being connected by fasteners; and / or, the second protective plate is provided with a second connecting flange at one end opposite to the hammer body along the axial direction of the drill frame, and the slag discharge pipe is provided with a second mating flange, the second connecting flange and the second mating flange being connected by fasteners.

[0010] In some embodiments, a first sealing element 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 sealing element is sandwiched between the outer wall of the air supply pipe and the inner wall of the air inlet; and / or, a second sealing element 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 sealing element is sandwiched between the outer wall of the slag discharge pipe and the channel wall of the first slag discharge channel.

[0011] In some embodiments, the drill pipe further includes a core splitting mechanism disposed on the cavity wall of the second slag discharge chamber, at least a portion of the core splitting mechanism being adapted to extend and retract radially along the drill frame to split the core in the second slag discharge chamber.

[0012] In some embodiments, the core splitting mechanism includes a driving member and a splitting head. The driving member is fixedly disposed on the cavity wall of the second slag discharge chamber, and the splitting head is connected to the output end of the driving member. The splitting head is adapted to extend out and squeeze the core under the drive of the driving member.

[0013] In some embodiments, the coring mechanism includes a coring drill and a caliper, which can be substituted for each other. The coring drill is used to extract a complete rock core from the second slag removal chamber, and the caliper is used to extract a fractured rock core from the second slag removal chamber.

[0014] In some embodiments, the hammer frame and the drill frame are sleeved together at their opposite ends, and the hammer frame is provided with a plurality of first threaded fixing holes arranged at intervals along its circumference, and the drill frame is provided with second threaded fixing holes corresponding one-to-one with the first threaded fixing holes. 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.

[0015] In some embodiments, the hammer holder has a positioning groove recessed along the axial direction of the hammer holder at one end edge facing the drill holder, and the inner wall of the drill holder has a positioning key protruding radially inward, the positioning key being adapted to engage with the positioning groove. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the clustered down-the-hole hammer according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the hammer body of the cluster-type down-the-hole hammer according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the drill rod of a clustered down-the-hole hammer according to an embodiment of the present invention at one angle.

[0020] Figure 4 This is a schematic diagram of the drill rod of the clustered down-the-hole hammer according to another angle of an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the core drill structure of the clustered down-the-hole hammer according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the caliper of the cluster-type down-the-hole hammer according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100-Cluster down-the-hole hammer;

[0025] 1-Hammer body;

[0026] 11-Hammer frame; 111-First slag discharge chamber; 112-Gas distribution chamber; 113-First slag discharge channel; 114-Connecting part; 115-First threaded fixing hole; 116-Positioning groove;

[0027] 12-Sub-hammer; 121-Impact chamber;

[0028] 2-Drill pipe;

[0029] 21-Drill frame; 211-Second slag discharge chamber; 212-Connecting mating part; 213-Second threaded fixing hole; 214-Positioning key;

[0030] 22-Gas supply pipe;

[0031] 23-Slag discharge pipe; 231-Second rotary joint; 232-Second mating flange;

[0032] 24 - First protective plate;

[0033] 25 - Second protective plate; 251 - Second connecting flange;

[0034] 26-Core splitting mechanism; 261-Drive component; 262-Splitting head;

[0035] 3-Core sampling mechanism;

[0036] 31-Coring drill; 311-Drill body; 312-Lifting rope;

[0037] 32-caliper; 321-main bracket; 322-claw; 323-retraction and extension drive. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] Currently, when constructing large-diameter pile holes exceeding one meter in diameter inside tunnels, the limited vertical space within the tunnel generally prevents the use of existing rotary drilling rigs, long spiral drilling rigs, and other large pile hole equipment. Furthermore, existing down-the-hole hammer drilling equipment uses a center-connected drill rod, which requires removing the drill rod and then extracting the rock core after drilling a certain distance, hindering continuous drilling, complicating the process, and resulting in low overall construction efficiency.

[0040] In view of this, the present invention provides a clustered down-the-hole hammer, which can eliminate the need to remove the drill rod from the hole and then take the core, simplifying the core taking process. This allows the clustered down-the-hole hammer to drill to the pile hole depth in one go, and the disassembly work can be carried out after the construction work is completed, which greatly improves the construction efficiency.

[0041] The following is for reference. Figures 1-6 A clustered down-the-hole hammer 100 according to an embodiment of the present invention is described.

[0042] Specifically, refer to Figure 1 The clustered down-the-hole hammer 100 of this embodiment may include: hammer body 1, drill rod 2 and core sampling mechanism 3.

[0043] Among them, combined Figure 1 and Figure 2 The hammer body 1 may include a hammer frame 11 and multiple sub-hammers 12. The hammer frame 11 is a hollow cylindrical shape, and a first slag discharge chamber 111 is defined on the inner side of the hammer frame 11. The first slag discharge chamber 111 extends through both ends along the axial direction of the hammer body 1, so that the rock core can be discharged upward through the first slag discharge chamber 111 during the drilling process. Multiple sub-hammers 12 are arranged at intervals along the circumference of the hammer frame 11 on the inner side of the hammer frame 11. Each sub-hammer 12 is provided with an impact chamber 121. During the drilling process, an air supply device supplies air into the impact chamber 121, thereby driving the sub-hammer 12 to move along the axial direction of the hammer frame 11 to impact and break the rock strata, thereby achieving 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 share the first slag discharge channel 113. Furthermore, the first slag discharge channel 113 is isolated from the first slag discharge chamber 111, so that the rock slag between the two sub-hammers 12 can be discharged upward through the first slag discharge channel 113.

[0044] Combination Figure 1 and Figure 3 The drill rod 2 may include a drill frame 21, an air supply pipe 22, and a slag discharge pipe 23. The drill frame 21 may also be a hollow cylinder. The drill frame 21 is connected to one end of the hammer frame 11 along the axial direction. For example, the drill frame 21 may be located on the upper side of the hammer frame 11 and fixedly connected to the upper end of the hammer frame 11. The drill frame 21 can 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 realizing the overall rotation and follow-up of the down-the-hole hammer 100. The inner side of the drill frame 21 defines a second slag discharge chamber 211. The two ends of the second slag discharge chamber 211 are connected along the axial direction. The second slag discharge chamber 211 is connected to the first slag discharge chamber 111. In this way, the rock core in the hammer body 1 can be discharged through the first slag discharge chamber 111 and the second slag discharge chamber 211.

[0045] Understandably, since the length of a single drill rod 2 is limited, the overall length of the clustered down-the-hole hammer 100 can be extended by connecting multiple drill rods 2 one by one during the drilling process. In other words, a new section of drill rod 2 can be added as needed during the drilling process, and so on, thereby extending the length. Correspondingly, the length of the air supply pipe 22 and the slag discharge pipe 23 can also be extended by adding new pipe sections, so as to achieve the purpose of the drill rod 2 providing torque, impact power and slag discharge to the hammer body 1.

[0046] 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. Understandably, the air supply pipe 22 can be connected to an external air compression system through a duct. In this way, the high-pressure gas generated by the air compression system can enter the air supply pipe 22 of the drill pipe 2 through the duct, and then the air supply pipe 22 supplies air to the multiple hammers 12 to drive the hammers 12 to move.

[0047] The slag discharge pipe 23 can correspond one-to-one with and be connected to the first slag discharge channel 113. In this way, the slag in the first slag discharge channel 113 can be discharged through the slag discharge pipe 23. Understandably, multiple slag discharge pipes 23 can be connected to the external main slag discharge pipe 23 so as to connect to the slag collection and dust suppression device through the main slag discharge pipe 23 to achieve the separation of air and rock slag, thereby achieving slag discharge.

[0048] The core sampling mechanism 3 is vertically and flexibly located inside the second slag discharge chamber 211. The core sampling mechanism 3 is suitable for removing rock debris from the second slag discharge chamber 211. In other words, during drilling, the core sampling mechanism 3 can directly extract the rock core from the second slag discharge chamber 211, thus eliminating the need to remove the drill rod 2 from the hole before core extraction. This allows the clustered down-the-hole hammer 100 of this embodiment to drill to the pile hole depth in one go, and disassembly can be performed after the construction work is completed, greatly improving construction efficiency. Furthermore, it enables centralized collection and processing of rock debris, meeting the environmental protection requirements of tunnel space and achieving a low-consumption, high-efficiency, and safer operating method.

[0049] According to an embodiment of the present invention, the clustered down-the-hole hammer 100, by movably and vertically mounting the core sampling mechanism 3 in the second cuttings outlet chamber 211 of the drill rod 2, allows the core sampling mechanism 3 to directly extract the rock core from the second cuttings outlet chamber 211 during drilling, thereby eliminating the need to remove the drill rod 2 from the hole before core sampling, simplifying the core sampling process. This allows the clustered down-the-hole hammer 100 to drill to the pile hole depth in one go, and disassembly is only required after the construction work is completed, greatly improving construction efficiency. Furthermore, it enables centralized collection and processing of rock cuttings, meeting the environmental protection requirements of tunnel space, and achieving a low-consumption, high-efficiency, and safer operating method.

[0050] In some embodiments, reference Figure 2The hammer frame 11 has an air distribution chamber 112 located near the drill rod 2. The air distribution chamber 112 has an air inlet and multiple air outlets. The air inlet is connected to the air supply pipe 22, and each air outlet corresponds to a sub-hammer 12. Each air outlet communicates with the impact chamber 121 of the corresponding sub-hammer 12. For example, the air distribution chamber 112 can extend circumferentially along the hammer frame 11 to form a ring. The air distribution chamber 112 is located near the top of the inner wall of the hammer frame 11. The air inlet can be located on the top wall of the air distribution chamber 112, and the air outlet can be located on the bottom wall of the air distribution chamber 112. Furthermore, multiple air outlets can correspond one-to-one with each sub-hammer 12 to facilitate communication between the air outlet and the impact chamber 121 of the sub-hammer 12. In this way, driving gas can be simultaneously distributed to multiple sub-hammers 12 through the air distribution chamber 112, which helps simplify the air supply system of the clustered down-the-hole hammer 100.

[0051] In some embodiments, combined with Figure 3 and Figure 4 The drill pipe 2 may also 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 air supply pipe 22, or it may be a polygonal structure. The first protective plate 24 is connected to the drill frame 21, and the first protective plate 24 and the drill frame 21 together cover the air supply pipe 22 to protect the air supply pipe 22 and prevent it from being damaged by the rock core, thereby ensuring reliable air supply. The air supply pipe 22 may be fixedly connected to the first protective plate 24, such as by snap-fit, plug-in, or flange connection.

[0052] The second protective plate 25 can be formed into an arc-shaped structure adapted to the slag discharge pipe 23, or it can be a polygonal structure. The second protective plate 25 is connected to the drill frame 21, and the second protective plate 25 and the drill frame 21 together cover the slag discharge pipe 23, thereby protecting the slag discharge pipe 23, preventing the slag discharge pipe 23 from being damaged by the rock core, and thus ensuring the airtightness of the slag discharge pipe 23, which is conducive to smooth slag discharge. The slag discharge pipe 23 can be fixedly connected to the second protective plate 25, for example, by snap-fit, plug-in, or flange connection.

[0053] In some embodiments, combined with Figure 3 and Figure 4 The first protective plate 24 is provided with a first connecting flange at one end opposite to the hammer body 1 along the axial direction of the drill frame 21, 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 mating flange. The first connecting flange and the first mating 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.

[0054] The second protective plate 25 has a second connecting flange 251 at one end opposite to the hammer body 1 along the axial direction of the drill frame 21. That is, the top of the second protective plate 25 can have a second connecting flange 251. The slag discharge pipe 23 has a second mating flange 232. The second connecting flange 251 and the second mating flange 232 are connected by fasteners. This ensures a reliable connection between the second protective plate 25 and the slag discharge pipe 23, improves the stability of the slag discharge pipe 23, and facilitates smooth slag discharge.

[0055] Of course, in some alternative embodiments, both the first connecting flange and the second connecting flange can be replaced with a clamp structure to clamp the gas supply pipe 22 and the slag discharge pipe 23.

[0056] In some embodiments, combined with Figure 3 and Figure 4 The air supply pipe 22 is equipped with a first rotary joint. For example, the first rotary joint can be a cylindrical shape with open ends. 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 mobility relative to the first rotary joint, which can reduce the pipeline disturbance brought about by the rotation of the hammer 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 a more stable and smooth air supply.

[0057] Correspondingly, a second rotary joint 231 is provided on the slag discharge pipe 23. For example, the second rotary joint 231 can be a cylindrical shape with open ends. The second rotary joint 231 is sleeved on the slag discharge pipe 23, and the second mating 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 mobility relative to the second rotary joint 231, which can reduce the pipeline disturbance brought about by the rotation of the hammer 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 a more stable and smooth slag discharge process.

[0058] In some possible embodiments, the first rotary joint and the second rotary joint 231 have the same structure, which makes the first rotary joint and the second rotary joint 231 highly versatile, convenient for later maintenance, and can reduce maintenance costs.

[0059] In some embodiments, a first sealing element is provided at one end of the air supply pipe 22 facing the hammer body 1 (e.g., the lower end of the air supply pipe 22). The first sealing element can be a sealing ring. The air supply pipe 22 can be inserted into the air inlet, and the first sealing element is sandwiched 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 chamber 112 form a male and female fitting method. At the same time, the first sealing element can ensure the sealing of the connection between the air supply pipe 22 and the air distribution chamber 112, prevent air leakage, and ensure sufficient air pressure to better drive the hammer 12 to work.

[0060] The end of the slag discharge pipe 23 facing the hammer body 1 (e.g., the lower end of the slag discharge pipe 23) is provided with a second sealing element. The second sealing element can be a sealing ring. The slag discharge pipe 23 can be inserted into the first slag discharge channel 113, and the second sealing element is sandwiched 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 form a male and female fitting method. At the same time, the second sealing element 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 carry out slag discharge operation.

[0061] 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, and a plurality of first sealing elements are provided, each corresponding to one of the first sealing grooves, with each first sealing element embedded in the corresponding first sealing groove to ensure the installation stability of the first sealing element. Correspondingly, the end of the slag discharge pipe 23 facing the hammer body 1 is provided with a plurality of second sealing grooves, and a plurality of second sealing elements are provided, each corresponding to one of the second sealing grooves, with each second sealing element embedded in the corresponding second sealing groove to ensure the installation stability of the second sealing element.

[0062] In some embodiments, both the first seal and the second seal can be made of plastic, which allows the first seal and the second seal to have a certain degree of elasticity, thereby improving the sealing performance and reducing the cost.

[0063] In some embodiments, combined with Figure 1 , Figure 3 and Figure 4 The drill pipe 2 may also include a core splitting mechanism 26. Specifically, the core splitting mechanism 26 is located on the wall of the second slag removal chamber 211. At least a portion of the structure of the core splitting mechanism 26 is adapted to extend and retract radially along the drill frame 21 to split the core within the second slag removal chamber 211. For example, when a complete, unbroken core is obtained during equipment operation, it is inconvenient to remove due to its large weight and volume. Therefore, the force of the core splitting mechanism 26 can be used to break the core, forming a smaller core, which can then be retrieved using the core retrieval mechanism 3. This reduces the difficulty of core retrieval, improves core retrieval efficiency, and consequently improves slag removal efficiency.

[0064] In some embodiments, reference Figure 4The core splitting mechanism 26 may include a driving component 261 and a splitting head 262. The driving component 261 may be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder, or other driving devices; this invention does not limit this. The driving component 261 is fixedly mounted on the wall of the second slag discharge chamber 211. The end of the splitting head 262 facing the core may be columnar, conical, blade-shaped, or have other structures. The specific structure of the splitting head 262 can be rationally designed according to actual needs to ensure that it can apply sufficient pressure to the core and reduce the difficulty of splitting it. The splitting head 262 is connected to the output end of the driving component 261, and is adapted to extend and compress the core under the drive of the driving component 261. Thus, the structure of the core splitting mechanism 26 is relatively simple and easy to implement.

[0065] In some embodiments, combined with Figure 5 and Figure 6 The coring mechanism 3 may include a coring drill 31 and a caliper 32, which are interchangeable. This means that the coring operation can be performed using either the coring drill 31 or the caliper 32 depending on the working conditions. Specifically, the coring drill 31 is used to retrieve intact rock cores from the second slag removal chamber 211, while the caliper 32 is used to retrieve fractured rock cores from the second slag removal chamber 211. This allows the coring mechanism 3 to meet the coring requirements of rock cores in various states, thus improving coring efficiency.

[0066] In some embodiments, reference Figure 5 The core drill 31 may include a drill body 311 and a hoisting rope 312. The drill body 311 is used to drill into the rock core and fix it to the rock core. The hoisting rope 312 is fixedly connected to the drill body 311 and is used to pull up the drill body 311 after the rock core is fixed, thereby removing the rock core.

[0067] In some embodiments, reference Figure 6 The clamp 32 may include a main support 321, jaws 322, and a retraction / release drive 323. There are multiple jaws 322, which are evenly spaced along the circumference of the main support 321. The retraction / release drive 323 may correspond one-to-one with the jaws 322. The multiple jaws 322 may be configured to move synchronously toward the center or synchronously away from the center under the drive of the retraction / release drive 323 to grip the rock core. Alternatively, the multiple jaws 322 may be configured to move independently of each other, which makes it easier to grip rock blocks with complex shapes.

[0068] In some embodiments, combined with Figure 2 and Figure 3The hammer frame 11 and the drill frame 21 are nested together at their respective ends, meaning that one of the top end of the hammer frame 11 or the bottom end of the drill frame 21 is inserted inside the other. For example, either the top end of the hammer frame 11 or the bottom end of the drill frame 21 can be inserted inside the hammer frame 11. Furthermore, the hammer frame 11 has multiple first threaded fixing holes 115, which are spaced apart circumferentially around the hammer frame 11. The drill frame 21 has 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 sequentially through the first threaded fixing holes 115 and the second threaded fixing holes 213. This simple and reliable connection method between the hammer frame 11 and the drill frame 21 effectively transmits torque.

[0069] For example Figure 2 and Figure 3 As shown, the top end of the hammer frame 11 has a connecting portion 114, and the bottom end 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 an interference fit. Multiple first threaded fixing holes 115 are evenly and spaced along the circumference of the hammer frame 11 on the connecting portion 114, and multiple second threaded fixing holes 213 are evenly and spaced 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 one-to-one. The fastener is a lock nut. The fastener can pass 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 relatively reliable, and the drill frame 21 can transmit torque to the hammer frame 11 effectively.

[0070] In some embodiments, combined with Figure 2 and Figure 3 The hammer frame 11 has a positioning groove 116 on one end edge facing the drill frame 21. The positioning groove 116 is recessed along the axial direction of the hammer frame 11. The inner wall of the drill frame 21 has a positioning key 214. The positioning key 214 protrudes inward along the radial direction of the drill frame 21. For example, the positioning groove 116 can be formed on the upper edge of the connecting part 114, and the positioning key 214 can be formed on the inner wall of the connecting mating part 212. The positioning key 214 is adapted to be inserted into the positioning groove 116. In this way, during the connection process between the drill frame 21 and the hammer frame 11, the alignment of the first threaded fixing hole 115 and the second threaded fixing hole 213 can be quickly achieved, so as to facilitate the quick connection between the hammer frame 11 and the drill frame 21.

[0071] Understandably, refer to Figure 3Since new sections of drill rod 2 need to be continuously added to the drill rod 2 during the pile hole operation, in order to facilitate the interconnection of multiple drill frames 21, a connecting mating part 212 can be provided at the bottom of each drill frame 21, and a connecting part 114 can be provided at the top of each drill frame 21. Furthermore, a positioning groove 116 is provided on the upper edge of the connecting part 114, and a positioning key 214 is provided on the lower edge of the connecting mating part 212. Both the connecting part 114 and the connecting mating part 212 are provided with mutually compatible threaded fixing holes. In this way, the overall length of the cluster down-the-hole hammer 100 can be easily increased to better carry out pile hole operations.

[0072] The following describes the construction method of the clustered down-the-hole hammer 100 according to an embodiment of the present invention, as follows:

[0073] S1, Use a pipe rolling machine to install the cluster down-the-hole hammer 100 and connect the pipes and other configurations;

[0074] S2, turn on the air source, and the pipe rolling machine drives the cluster down-the-hole hammer 100 to carry out rock entry operation;

[0075] S3, after drilling one section of drill rod 2, for the rock core that could not be broken, use the rock core splitting mechanism 26 to break the rock core, and then use caliper 32 or core drill 31 to perform core extraction and take out the rock core.

[0076] S4. After the core is removed, the pipeline is disassembled, a new section of drill rod 2 is installed, the pipeline is reconnected, and the drilling and coring process is repeated until the required drilling depth is reached.

[0077] S5. After drilling and coring are completed, disassemble drill rod 2 and hammer 1 in the reverse order of installation.

[0078] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0079] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0080] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0081] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used 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 other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A clustered down-the-hole hammer, characterized in that, include: The hammer body includes a hammer frame and multiple sub-hammers. The inner side of the hammer frame defines a first slag discharge chamber, which extends through both ends along the axial direction of the hammer body. The multiple sub-hammers are arranged circumferentially on the inner side of the hammer frame. Each sub-hammer is provided with an impact chamber, and a first slag discharge channel is provided between two adjacent sub-hammers. The drill rod includes a drill frame, an air supply pipe, and a slag discharge pipe. The drill frame is connected to one end of the hammer frame along the axial direction. The inner side of the drill frame defines a second slag discharge chamber, which is connected to the first slag discharge chamber. The air supply pipe is connected to the impact chambers of multiple hammers to supply air to the multiple impact chambers. The slag discharge pipe corresponds to and is connected to the first slag discharge channel. A core sampling mechanism is movably mounted in the second slag discharge chamber. The core sampling mechanism is used to extract the rock core or rock debris from the second slag discharge chamber without the drill rod being pulled out of the pile hole. The coring mechanism includes a coring drill and a caliper, which can be substituted for each other. The coring drill is used to extract a complete rock core from the second slag removal chamber, and the caliper is used to extract a fractured rock core from the second slag removal chamber. The core drill includes a drill body and a hoisting rope. The drill body is used to drill into the rock core and is fixed to the rock core. The hoisting rope is fixedly connected to the drill body and is used to pull up the drill body after it is fixed to the rock core in order to remove the rock core. The caliper includes a main support, multiple jaws, and multiple retraction / extension drive components. The multiple jaws are spaced apart circumferentially along the main support, and the multiple retraction / extension drive components are arranged one-to-one with the multiple jaws. The multiple jaws are used to move in a direction toward the center or in a direction away from the center under the drive of the retraction / extension drive components to grip the rock core.

2. The clustered down-the-hole hammer according to claim 1, characterized in that, The hammer frame has an air distribution chamber near the drill rod. The air distribution chamber has an air inlet and multiple air outlets. The air inlet is connected to the air supply pipe, and the air outlets correspond one-to-one with the sub-hammers. Each air outlet is connected to the impact chamber of the corresponding sub-hammer.

3. The clustered down-the-hole hammer according to claim 2, characterized in that, The drill pipe also includes a first protective plate and a second protective plate. The first protective plate is connected to the drill frame and together they cover 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 together they cover the slag discharge pipe, which is fixedly connected to the second protective plate.

4. The clustered down-the-hole hammer according to claim 3, characterized in that, The first protective plate has a first connecting flange at one end opposite to the hammer body along the axial direction of the drill frame, and the air supply pipe has a first mating flange. 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 opposite to the hammer body along the axial direction of the drill frame, and the slag discharge pipe is provided with a second mating flange. The second connecting flange and the second mating flange are connected by fasteners.

5. The clustered down-the-hole hammer according to claim 3, characterized in that, The air supply pipe has a first sealing element at one end facing the hammer body. The air supply pipe is inserted into the air inlet, and the first sealing element is sandwiched between the outer wall of the air supply pipe and the inner wall of the air inlet; and / or, The slag discharge pipe has a second sealing element at one end facing the hammer body. The slag discharge pipe is inserted into the first slag discharge channel, and the second sealing element is sandwiched 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 also includes: A core splitting mechanism is provided on the cavity wall of the second slag discharge chamber. At least a portion of the structure of the core splitting mechanism is adapted to extend and retract along the radial direction of the drill frame to split the core in the second slag discharge chamber.

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

8. The clustered down-the-hole hammer according to any one of claims 1-5, characterized in that, The hammer frame and the drill frame are nested together at their opposite ends. Furthermore, the hammer frame is provided with a plurality of first threaded fixing holes arranged at intervals along its circumference, and the drill frame is provided with second threaded fixing holes corresponding one-to-one with the first threaded fixing holes. 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.

9. The clustered down-the-hole hammer according to claim 8, characterized in that, The hammer frame has a positioning groove recessed along the axial direction of the hammer frame at one end edge facing the drill frame, and the inner wall of the drill frame has a positioning key that protrudes radially inward, the positioning key being adapted to engage with the positioning groove.

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