Rock drill equipment for ore extraction
By using a hydraulically driven lifting head combined with a shock-absorbing connector and impact block, repeated impact drilling of the drill rod is achieved, which solves the problems of drill rod fatigue fracture and motor damage, extends the life of the drill rod, and improves the reliability of the rock drill.
Patent Information
- Application Number
- CN202511404457.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2025-11-21
AI Technical Summary
The drill rods of existing rock drills are prone to fatigue fracture under axial impact loads and torsional shear forces, and the rigid connection between the motor and the drill rod leads to fatigue damage to the motor components and ineffective buffering of impact energy.
The lifting head driven by a hydraulic cylinder is combined with a shock block and a buffer connector. The drilling is performed by repeated impacts to prevent the drill rod from rotating. The rotation of the drill rod is achieved by using an internal threaded sleeve and a lead screw sleeve. The extension and retraction of the hydraulic cylinder are controlled by a clamping plate and a controller to reduce impact vibration.
It extends the service life of the drill rod, avoids motor damage, and improves the drilling efficiency and reliability of the rock drill under extreme conditions.
Smart Images
Figure CN120990474A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of rock drill, in particular to a rock drill device for ore mining. BACKGROUND
[0002] The existing rock drill as the core equipment of mine exploitation generally adopts the impact rotation principle to realize rock drilling. The core structure includes an impact mechanism, a rotating mechanism and a drill rod. When working, the impact mechanism generates impact force through reciprocating motion, the rotating mechanism drives the drill rod to rotate, and the two work together to form a circular hole in the rock. As a key component for energy transmission, the drill rod needs to withstand axial impact load and torsional shear force at the same time, and complex alternating stress field will be generated in the material of the drill rod. The alternating stress will cause fatigue fracture of the drill rod, which seriously affects the service life of the drill rod. In addition, the existing drill rod rotating drive mostly adopts a motor direct drive scheme, and the motor is installed at the tail of the drill rod. This design has two problems: first, the transient vibration generated by the impact of the rock drill will be directly transmitted to the motor through the drill rod, causing fatigue damage of the motor bearings, windings and other components; second, the rigid connection of the motor and the drill rod makes the impact energy unable to be effectively buffered, further aggravating the wear of the internal gear pair of the motor. Therefore, it is necessary to provide a rock drill device for ore mining to solve the above problems. SUMMARY
[0003] The present application relates to the technical field of rock drill, in particular to a rock drill device for ore mining.
[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a rock drill device for ore mining, comprising a rack, a hydraulic cylinder and a drill rod, the hydraulic cylinder is fixedly installed on the rack, a lifting head is rotatably connected to the extension end of the hydraulic cylinder, a striking block is arranged directly below the lifting head, the drill rod is located directly below the striking block, the lifting head and the striking block are connected through a buffer connecting piece, a lead screw sleeve is sleeved outside the striking block, the lead screw sleeve and the lifting head are fixedly connected through a connecting rod, an internal thread sleeve is fixedly connected to the rack, the internal thread sleeve and the lead screw sleeve are connected through thread cooperation, a pair of extension elements are fixedly installed on the inner wall of the lead screw sleeve, a clamping plate is installed on the extension elements, the drill rod can be clamped through the clamping plate, a guide limiting sleeve is fixedly connected to the bottom of the rack, the inner wall of the guide limiting sleeve and the outer side of the drill rod are slidably connected.
[0005] As a further scheme of the present application, the rock drill device further comprises a controller for controlling the hydraulic cylinder and the extension elements, the controller is used for recording the extension amount of the hydraulic cylinder each time, when the difference between the latest recorded extension amount and the last extension amount is zero for N consecutive times, the extension elements are controlled to perform extension action, so that the clamping plate clamps the drill rod, and N is a constant value.
[0006] As a further scheme of the present application, a pressure sensor is embedded in the bottom of the hitting block, and the monitoring value of the pressure sensor can be transmitted to the controller, and when the monitoring value is greater than a pressure threshold value, the controller makes the hydraulic cylinder retract.
[0007] As a further scheme of the present application, the buffer connecting piece comprises a buffer sleeve, a connecting shaft and an energy storage sleeve, a second piston is slidingly connected to the inner wall of the buffer sleeve, the lower end surface of the second piston is fixedly connected to the connecting shaft, the connecting shaft is connected to the hitting block, the upper end of the buffer sleeve is connected to the lifting head, the buffer sleeve is filled with damping liquid, the damping liquid is above the second piston, a through hole is arranged at the upper end of the side surface of the buffer sleeve, and the inside of the buffer sleeve and the inside of the energy storage sleeve are communicated through the through hole.
[0008] As a further scheme of the present application, one end of the energy storage sleeve is fixedly connected to the side surface of the buffer sleeve, and an annular plate is fixedly connected to the inner wall of the other end of the energy storage sleeve, the inner wall of the energy storage sleeve is slidingly connected to a first piston, and the first piston is connected to the annular plate through a plurality of return springs.
[0009] As a further scheme of the present application, the buffer sleeve is vertically arranged, the energy storage sleeve is horizontally arranged, and the buffer connecting piece is composed of a plurality of buffer sleeves and energy storage sleeves, and when the second piston is located at the lowermost end of the stroke, the first piston is located at the through hole.
[0010] As a further scheme of the present application, the pair of clamping plates are located below the hitting block, the center line of the screw rod sleeve is arranged in line with the center line of the drill rod, the inner thread sleeve is sleeved outside the screw rod sleeve, and a protective cover is arranged outside the screw rod sleeve and the inner thread sleeve.
[0011] As a further scheme of the present application, the damping liquid is silicone oil, glycerol or fluorinated liquid, and when the second piston is located at the lowermost end of the stroke, the damping liquid fills the inside space of the buffer sleeve.
[0012] In summary, the present application has the following advantages:
[0013] In normal operation, the drill rod does not rotate, and only relies on the repeated impact of the hitting block to punch holes, avoiding the alternating stress generated inside the material under the combined action of impact and rotation of the drill rod, thereby prolonging the service life of the drill rod. In extreme cases, the drill rod is clamped and fixed by the clamping plates, and punching is performed through the combined action of impact and rotation, which ensures that punching can be smoothly performed in extreme cases. In addition, through the arrangement of the inner thread sleeve and the screw rod sleeve, the rotation of the drill rod can be realized without using a motor, thereby avoiding damage to the motor under impact vibration. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.
[0015] Figure 1 A three-dimensional structure diagram of a rock drill device for ore mining according to an embodiment of the present application Figure 1 .
[0016] Figure 2 A three-dimensional structure diagram of a rock drill device for ore mining according to an embodiment of the present application Figure 2 .
[0017] Figure 3 A three-dimensional structure diagram of a rock drill device for ore mining according to an embodiment of the present application Figure 3 .
[0018] Figure 4 A connection diagram of a lifting head in a rock drill device for ore mining according to an embodiment of the present application.
[0019] Figure 5 A three-dimensional structure diagram of a rock drill device for ore mining according to an embodiment of the present application Figure 4 . A local enlarged diagram of A in FIG. 1.
[0020] Figure 6 A diagram of a buffer connecting piece in a rock drill device for ore mining according to an embodiment of the present application.
[0021] Figure 7 A local enlarged diagram of B in FIG. 1. Figure 6 . A local enlarged diagram of B in FIG. 1.
[0022] The drawings show that: 1-frame, 2-hydraulic cylinder, 3-inner threaded sleeve, 4-screw sleeve, 5-drill rod, 6-guiding and limiting sleeve, 7-lifting head, 8-connecting rod, 9-hitting block, 10-buffer connecting piece, 11-elastic element, 12-clamping plate, 13-pressure sensor, 101-buffer sleeve, 102-connecting shaft, 103-energy storage sleeve, 104-first piston, 105-return spring, 106-ring plate, 107-second piston, 108-through hole. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.
[0024] The specific implementation of the present application is described in detail below in combination with specific embodiments.
[0025] Please refer to Figure 1 , Figure 2 and Figure 3 , the rock drilling machine device for ore mining provided by the embodiment of the present application comprises a rack 1, a hydraulic cylinder 2 and a drill rod 5, the drill rod 5 is used for drilling, breaking and forming a blast hole on the rock, and providing conditions for subsequent blasting or tunneling operation. The hydraulic cylinder 2 is fixedly installed on the rack 1, a lifting head 7 is rotatably connected to the telescopic end of the hydraulic cylinder 2, a striking block 9 is arranged directly below the lifting head 7, the drill rod 5 is located directly below the striking block 9, and the striking block 9 repeatedly impacts the drill rod 5, that is, drilling operation can be performed. The lifting head 7 and the striking block 9 are connected through a buffer connecting piece 10, and through the arrangement of the buffer connecting piece 10, great damage caused by impact force is avoided. A lead screw sleeve 4 is arranged on the outer side of the striking block 9, the lead screw sleeve 4 is fixedly connected to the lifting head 7 through a plurality of connecting rods 8, an internal thread sleeve 3 is fixedly connected to the rack 1, the internal thread sleeve 3 is connected to the lead screw sleeve 4 through thread cooperation, the center line of the lead screw sleeve 4 is arranged in line with the center line of the drill rod 5, the internal thread sleeve 3 is arranged on the outer side of the lead screw sleeve 4, and protective covers are arranged on the outer sides of the lead screw sleeve 4 and the internal thread sleeve 3 to avoid the entry of debris into the connection between the internal thread sleeve 3 and the lead screw sleeve 4. A pair of telescopic elements 11 are fixedly installed on the inner wall of the lead screw sleeve 4, the telescopic elements 11 can be electric push rods, clamping plates 12 are installed on the telescopic elements 11, and the pair of clamping plates 12 are located below the striking block 9. The drill rod 5 can be clamped through the clamping plates 12, a guide limiting sleeve 6 is fixedly connected to the bottom of the rack 1, the inner wall of the guide limiting sleeve 6 is slidably connected to the outer side of the drill rod 5, and the working direction of the drill rod 5 is ensured through the arrangement of the guide limiting sleeve 6. During normal operation, the drill rod 5 will not rotate, a drill bit is installed on the drill rod 5, and drilling is performed only through repeated impact of the striking block 9, so that the alternating stress generated in the material under the combined action of impact and rotation of the drill rod 5 is avoided, and the service life of the drill rod 5 is prolonged. When the repeated impact of the striking block 9 has no obvious effect, the drill rod 5 can be clamped and fixed through the clamping plates 12, and drilling is performed through similar traditional impact and rotation, so that smooth drilling in extreme conditions is ensured, and the applicability of the embodiment of the present application is improved. In addition, through the arrangement of the internal thread sleeve 3 and the lead screw sleeve 4, the rotation operation of the drill rod 5 can be realized without using a motor, and damage to the motor caused by impact vibration is avoided.
[0026] In the embodiment of the present application, the rock drill device further comprises a controller capable of controlling the hydraulic cylinder 2 and the telescopic element 11, the controller is used to record the lengthening amount of the hydraulic cylinder 2 each time, when the difference between the latest recorded lengthening amount and the last lengthening amount is zero for N times in succession, N is a constant value, for example, N is 20, it indicates that an extreme situation occurs and the repeated impact of the impact block 9 cannot continue to drill, at this time, the telescopic element 11 is controlled to perform the lengthening action, so that the clamping plate 12 clamps the drill rod 5, and the drill rod 5 can rotate.
[0027] Please refer to Figure 1 , Figure 2 and Figure 6 In the embodiment of the present application, the bottom of the impact block 9 is embedded with a pressure sensor 13, the monitoring value of the pressure sensor 13 can be transmitted to the controller, when the monitoring value is greater than the pressure threshold value, the pressure threshold value is a constant value set in advance, it indicates that the impact block 9 collides with the drill rod 5, the controller controls the hydraulic cylinder 2 to perform the contraction action, and then performs the next impact operation.
[0028] Please refer to Figures 1 to 7 In the embodiment of the present application, the buffer connecting piece 10 comprises a buffer sleeve 101, a connecting shaft 102 and an energy storage sleeve 103, the inner wall of the buffer sleeve 101 is slidably connected with a second piston 107, the lower end surface of the second piston 107 is fixedly connected with the connecting shaft 102, the connecting shaft 102 is connected with the impact block 9, the upper end of the buffer sleeve 101 is connected with the lifting head 7, the buffer sleeve 101 is filled with damping liquid, the damping liquid is located above the second piston 107, the upper end of the side surface of the buffer sleeve 101 is provided with a through hole 108, the through hole 108 communicates the inside of the buffer sleeve 101 with the inside of the energy storage sleeve 103. The damping liquid is silicon oil, glycerol or fluorinated liquid, wherein, the silicon oil has the advantages of chemical stability, high and low temperature resistance, anti-aging, non-corrosive and the like, the low viscosity silicon oil has good anti-vibration effect, the fluorinated liquid has the extreme environmental adaptability of high temperature resistance and corrosion resistance. When the second piston 107 is located at the lowermost end of the stroke, the damping liquid fills the inside space of the buffer sleeve 101.
[0029] In the embodiment of the present application, one end of the energy storage sleeve 103 is fixedly connected with the side surface of the buffer sleeve 101, the inner wall of the other end of the energy storage sleeve 103 is fixedly connected with an annular plate 106, the inner wall of the energy storage sleeve 103 is slidingly and matchingly connected with a first piston 104, and the first piston 104 is connected with the annular plate 106 through a plurality of return springs 105. The buffer sleeve 101 is vertically arranged, the energy storage sleeve 103 is horizontally arranged, the buffer connecting piece 10 is composed of a plurality of groups of buffer sleeves 101 and energy storage sleeves 103, when the second piston 107 is located at the lowermost end of the stroke, the first piston 104 is located at the through hole 108. When the collision between the hitting block 9 and the drill rod 5 occurs, under the action of the impact force, the connecting shaft 102 will rebound upward with the second piston 107, the damping liquid will be pressed into the energy storage sleeve 103, the first piston 104 moves outward, and the return spring 105 is compressed, so that the impact vibration is relieved, and the buffering effect is good. Then, under the action of the gravity of the return spring 105 and the hitting block 9, the second piston 107 moves downward, the first piston 104 moves inward, the damping liquid returns to the buffer sleeve 101, and the whole buffer connecting piece 10 returns to the initial state.
[0030] The working process of the embodiment of the present application is as follows: in use, the telescopic element 11 is started, so that the clamping plate 12 clamps and fixes the drill rod 5, then the drill bit on the drill rod 5 is aligned with the position where the hole needs to be punched, and the rack 1 is fixed, so that the formal operation can be carried out. In the formal operation, the clamping plate 12 releases the drill rod 5, the clamping plate 12 and the drill rod 5 keep a distance, then the hydraulic cylinder 2 is started, so that the lifting head 7 moves downward, the hitting block 9 also moves downward, the hitting block 9 impacts the drill rod 5, after the impact, the hitting block 9 moves upward, and then moves downward, the above process is repeated, and the punching operation is carried out. When the repeated impact of the hitting block 9 has no obvious effect, the telescopic element 11 is started again, the drill rod 5 is clamped and fixed through the clamping plate 12, then the hydraulic cylinder 2 is contracted, the lifting head 7 and the drill rod 5 move upward, so that the lower end of the drill rod 5 is a certain distance away from the target point, then the lifting head 7 moves downward, under the action of the internal thread sleeve 3, the screw sleeve 4 rotates, and then the drill rod 5 also rotates, at this time, the drill rod 5 rotates while impacting downward, which can be repeated for multiple times, and the punching operation in the extreme case is carried out.
[0031] For those skilled in the art, although several embodiments and examples of the present application are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the application. These new embodiments can be implemented in other various ways, and various omissions, substitutions, changes can be made within the scope of the main idea of the application. These embodiments and their modifications are included in the scope and main idea of the application, and are included in the scope of the application and its equivalents described in the claims.
[0032] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.
Claims
1. A rock drilling machine for ore mining, comprising a frame (1), a hydraulic cylinder (2), and a drill rod (5), wherein the hydraulic cylinder (2) is fixedly mounted on the frame (1), characterized in that, A lifting head (7) is rotatably connected to the telescopic end of the hydraulic cylinder (2). A striking block (9) is arranged directly below the lifting head (7). The chisel (5) is located directly below the striking block (9). The lifting head (7) and the striking block (9) are connected by a buffer connector (10). A lead screw sleeve (4) is sleeved on the outside of the striking block (9). The lead screw sleeve (4) and the lifting head (7) are fixedly connected by a connecting rod (8). The frame (1) is fixedly connected to... An internal threaded sleeve (3) is connected to the lead screw sleeve (4) by a threaded connection. A pair of telescopic elements (11) are fixedly installed on the inner wall of the lead screw sleeve (4). A clamping plate (12) is installed on the telescopic element (11). The clamping plate (12) can clamp the drill rod (5). A guide limiting sleeve (6) is fixedly connected to the bottom of the frame (1). The inner wall of the guide limiting sleeve (6) is slidably connected to the outer side of the drill rod (5).
2. The rock drilling equipment for ore mining according to claim 1, characterized in that, The rock drilling equipment also includes a controller, which is used to control the hydraulic cylinder (2) and the telescopic element (11). The controller is used to record the extension amount of the hydraulic cylinder (2) each time. When the difference between the latest recorded extension amount and the previous extension amount is zero after N consecutive times, the telescopic element (11) is controlled to extend, so that the clamping plate (12) clamps the drill rod (5). N is a constant value.
3. The rock drilling equipment for ore mining according to claim 2, characterized in that, A pressure sensor (13) is embedded in the bottom of the striking block (9). The monitoring value of the pressure sensor (13) can be transmitted to the controller. When the monitoring value is greater than the pressure threshold, the controller will cause the hydraulic cylinder (2) to retract.
4. The rock drilling equipment for ore mining according to claim 1, characterized in that, The buffer connector (10) includes a buffer sleeve (101), a connecting shaft (102), and an energy storage sleeve (103). The inner wall of the buffer sleeve (101) is slidably connected to a second piston (107). The lower end face of the second piston (107) is fixedly connected to the connecting shaft (102). The connecting shaft (102) is connected to the striking block (9). The upper end of the buffer sleeve (101) is connected to the lifting head (7). The buffer sleeve (101) is filled with damping fluid, which is located above the second piston (107). A through hole (108) is provided at the upper end of the side of the buffer sleeve (101), which connects the interior of the buffer sleeve (101) with the interior of the energy storage sleeve (103).
5. The rock drilling equipment for ore mining according to claim 4, characterized in that, One end of the energy storage sleeve (103) is fixedly connected to the side of the buffer sleeve (101), and an annular plate (106) is fixedly connected to the inner wall of the other end of the energy storage sleeve (103). A first piston (104) is slidably connected to the inner wall of the energy storage sleeve (103), and the first piston (104) and the annular plate (106) are connected by a number of return springs (105).
6. The rock drilling equipment for ore mining according to claim 5, characterized in that, The buffer sleeve (101) is set vertically, and the energy storage sleeve (103) is set horizontally. The buffer connector (10) is composed of multiple sets of buffer sleeves (101) and energy storage sleeves (103). When the second piston (107) is at the lowest end of the stroke, the first piston (104) is located at the through hole (108).
7. The rock drilling equipment for ore mining according to claim 1, characterized in that, The pair of clamps (12) are located below the striking block (9). The center line of the lead screw sleeve (4) is collinear with the center line of the drill rod (5). The internal thread sleeve (3) is sleeved on the outside of the lead screw sleeve (4). The outer sides of the lead screw sleeve (4) and the internal thread sleeve (3) are provided with protective covers.
8. The rock drilling equipment for ore mining according to claim 4, characterized in that, The damping fluid is silicone oil, glycerin or fluorinated fluid. When the second piston (107) is at the lowest point of its stroke, the damping fluid fills the internal space of the buffer sleeve (101).