Coal mine hydraulic jumbolter

Abstract

The invention relates to the technical field of anchor rod drilling machines, and discloses a coal mine hydraulic anchor rod drilling machine which comprises a machine body, an operation arm, a hydraulic cylinder and a connector, an anchor rod body is installed at the top of the connector, an installation block is arranged on one side of the machine body, a threaded rod is arranged in the installation block in a penetrating mode, and the threaded rod is connected with the installation block through a limiting assembly. The limiting assembly enables the threaded rod not to rotate around the axis of the threaded rod, the surface of the threaded rod is in threaded connection with a synchronous wheel, the surface of the synchronous wheel is sleeved with a synchronous belt, the synchronous belt is connected with the anchor rod body through a positioning assembly, and when the anchor rod body rotates, the synchronous belt is driven to drive the synchronous wheel to rotate. And the threaded rod in threaded fit with the synchronous wheel correspondingly reciprocates up and down in the mounting block. When the anchor rod is pulled out, the pipe threaded rod is driven by self-spinning force of the anchor rod to screw in towards the rock wall of the roadway, counter-acting force is generated to reversely push the anchor rod, the anchor rod pulling-out effect is remarkably improved, and the anchor rod construction efficiency is improved to a certain degree.

Description

Technical Field

[0001] The present invention relates to the technical field of anchor drilling machines, and more particularly to a hydraulic anchor drilling machine for coal mines. Background Art

[0002] As core equipment in the fields of mine tunnels, tunnel support and slope reinforcement, hydraulic anchor drilling rigs use a hydraulic system to drive the drill rod to rotate and apply axial thrust to achieve efficient anchoring of the anchor rod. Compared with traditional pneumatic or electric drilling rigs, they have the advantages of high power density, strong operating stability and good environmental adaptability, and have gradually become the preferred tool for support operations under complex geological conditions.

[0003] Currently, in actual construction, the anchor drilling process often encounters obstructions due to the development of rock cracks, sudden changes in hardness or wear of the drill bit, forcing the operation to be interrupted and the anchor bolt to be pulled out. At this time, the design contradictions of the traditional hydraulic anchor drilling rig are highlighted. Although its hydraulic system can efficiently advance the anchor bolt, when pulling it out in the reverse direction, it only relies on the anchor bolt's own weight and the passive contraction of the hydraulic cylinder, and the active pullback is relatively weak. Especially in horizontal or elevated drilling, the anchor bolt's gravity is insufficient. Once rock cuttings are wrapped, drill teeth are embedded or surrounding rock is deformed, resulting in a surge in friction resistance, problems such as "anchor bolt locking" are likely to occur, which not only delays the construction period, but may also cause chain failures such as drill rod breakage and hydraulic system overload. Summary of the Invention

[0004] The present invention discloses a coal mine hydraulic anchor drilling rig to solve the technical problems in the above background technology.

[0005] The present invention discloses a coal mine hydraulic anchor drilling machine, comprising a machine body, an operating arm, a hydraulic cylinder and a joint, wherein an anchor body is mounted on the top of the joint, a mounting block is provided on one side of the machine body, a threaded rod is passed through the mounting block, the threaded rod is connected to the mounting block via a limit assembly, the limit assembly prevents the threaded rod from rotating around its axis, a synchronous wheel is threadedly connected to the surface of the threaded rod, a synchronous belt is sleeved on the surface of the synchronous wheel, and the synchronous belt is connected to the anchor body via a positioning assembly; When the anchor rod body rotates, the synchronous belt is driven to rotate the synchronous wheel, so that the threaded rod matched with the thread of the synchronous wheel moves back and forth up and down in the installation block accordingly.

[0006] Preferably, the positioning assembly includes two rotating plates mounted on top of the synchronous wheel, and two limiting rods spaced a certain distance apart are provided at the bottom of any of the rotating plates, and the synchronous belt is passed through and wound between the two limiting rods and pressed against the surface of the anchor rod body; It also includes an adjustment component for adjusting the distance between the limit rod and the synchronous wheel.

[0007] Preferably, the adjustment assembly includes a movable plate, the movable plate slides in the rotating plate, and the two limit rods are rotatably connected to the surface of the movable plate. A propulsion rod is also fixedly connected in the rotating plate, and the output end of the propulsion rod is fixedly connected to one side of the movable plate.

[0008] Preferably, it also includes a trigger component, which is arranged at the bottom of the hydraulic cylinder. The trigger component includes a groove opened in the output end of the hydraulic cylinder. An extrusion block is slidably connected in the groove. The extrusion block is connected to the hydraulic cylinder through a spring. A distance sensor is also installed in the groove. The distance sensor is electrically connected to the push rod. In the conventional anchor rod drilling state, the extrusion block is completely stuck in the groove.

[0009] Preferably, the limiting assembly includes a sleeve fixedly connected to the top of the mounting block, the sleeve is sleeved on the surface of the threaded rod, a limiting groove is provided on the surface of the threaded rod, a limiting strip adapted to the limiting groove is provided on the inner wall of the sleeve, and the synchronous wheel rotates on the top of the sleeve.

[0010] Preferably, an auxiliary component is also included, which includes an adjustment plate arranged between the two rotating plates, an adjustment groove adapted to the adjustment plate is opened between the two rotating plates, and a number of protrusions are fixedly connected on both sides of the adjustment plate. After the two rotating plates are hinged to each other, they are sleeved on the surface of the threaded rod. When the protrusion abuts against the inner wall of the adjustment groove, the angle at the hinge of the two rotating plates becomes larger.

[0011] Preferably, a tension spring is provided between the two rotating plates, and both ends of the tension spring are fixedly connected in the two rotating plates respectively.

[0012] Preferably, the top and bottom of the adjustment plate are fixedly connected with connecting plates, and the connecting plates are rotatably connected to the threaded rod.

[0013] Preferably, a driving motor is installed in the body, and the output end of the driving motor is connected to the connector.

[0014] Preferably, two handles are fixedly connected to the surface of the body.

[0015] The beneficial effects of the present invention are: The present invention sets a threaded rod and cooperates with a synchronous belt and a synchronous wheel. When the anchor rod is pulled out, the self-spinning force of the anchor rod drives the pipe threaded rod to rotate toward the rock wall of the tunnel, generating a reaction force to push the anchor rod back, which significantly improves the anchor rod pulling-out effect. The anchor rod pulling-out is no longer affected by the anchor jamming and locking, which solves the shortcomings of the existing technology and improves the anchor rod construction efficiency to a certain extent.

[0016] The present invention sets an auxiliary component. During the process of continuous anchor withdrawal, the adjustment plate with protrusions on the surface is moved to continuously expand the two relative rotating plates, thereby tightening the synchronous belt, so that it continuously pushes the anchor rod body to shake, and the anchor rod continuously expands the anchor hole, thereby improving the relative loosening effect between the anchor rod body and the rock wall, and further improving the anchor withdrawal and anchor pulling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the present invention used to show that the two rotating plates are in a normal state; Figure 3 This is a schematic diagram of the present invention for showing two rotating plates in an outwardly expanded state; Figure 4 This is a cross-sectional view of the present invention for showing the internal structure of the casing and its surrounding structures; Figure 5 It is a cross-sectional schematic diagram of the present invention for illustrating the bottom structure of the rotating plate; Figure 6 This is a schematic diagram of the present invention for illustrating the connection between two rotating plates and a tension spring; Figure 7 It is a schematic diagram of the present invention for showing the trigger component.

[0018] In the figure: 1. body; 11. operating arm; 12. handle; 13. joint; 14. anchor rod body; 2. hydraulic cylinder; 21. extrusion block; 211. spring; 22. distance sensor; 3. mounting block; 31. sleeve; 311. threaded rod; 312. limiting groove; 313. limiting strip; 314. connecting plate; 32. rotating plate; 321. limiting rod; 322. movable plate; 323. propulsion rod; 324. tension spring; 33. synchronous wheel; 331. synchronous belt; 34. adjusting plate; 341. bump. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The embodiment of the present invention discloses a coal mine hydraulic anchor drilling machine, such as Figure 1-7As shown, it includes a body 1, an operating arm 11, a hydraulic cylinder 2 and a joint 13. The hydraulic cylinder 2 is fixedly connected to the bottom of the body 1, and its output end is downward, which plays the role of pushing the anchor rod during the anchor rod drilling process. The operating arm 11 is hinged on the surface of the body 1. The operating arm 11 has a certain length so that it can be easily operated when the body 1 is lifted to a certain height by the hydraulic cylinder 2. The surface of the operating arm 11 is equipped with handrails and other control switches to facilitate the control of the entire device through the operating arm 11. The swing direction and rotation angle of the body 1 can be controlled by the handrails on the surface of the operating arm 11. An anchor rod body 14 is installed on the top of the head 13, and the joint 13 is used to connect the anchor rod body 14. A lock buckle can also be provided at the connection between the top of the joint 13 and the anchor rod body 14 to fasten the anchor rod body 14. A mounting block 3 is provided on one side of the body 1, and a threaded rod 311 is passed through the mounting block 3. The threaded rod 311 is connected to the mounting block 3 through a limiting component. The limiting component prevents the threaded rod 311 from rotating around its axis. A synchronous wheel 33 is threadedly connected to the surface of the threaded rod 311, and a synchronous belt 331 is covered on the surface of the synchronous wheel 33. The synchronous belt 331 is connected to the anchor rod body 14 through a positioning component.

[0021] When the bolt body 14 rotates, the transmission synchronous belt 331 drives the synchronous wheel 33 to rotate, so that the threaded rod 311 that is threadedly matched with the synchronous wheel 33 moves back and forth in the mounting block 3 accordingly. According to the rotation direction of the bolt body 14, the threaded rod 311 moves toward the inner wall of the tunnel or away from the inner wall of the tunnel accordingly. After the threaded rod 311 moves toward the inner wall of the tunnel and contacts the inner wall of the tunnel, the threaded rod 311 is hindered by the inner wall of the tunnel under the continuous rotation of the bolt body 14, and the entire device is pushed back accordingly, so that the bolt body 14 moves in the direction away from the anchor hole, thereby facilitating the extraction of the bolt body 14 from the anchor hole, reducing the problem of difficulty in extraction caused by the anchor being stuck or locked, and both extraction and drilling are achieved through this device, reducing the high cost and time-consuming problem caused by the additional use of other anchor extraction tools, and improving the efficiency of anchor extraction and extraction.

[0022] like Figure 2 、 Figure 3 and Figure 4 As shown, in this embodiment, the positioning assembly includes two rotating plates 32 installed on the top of the synchronous wheel 33, and two limit rods 321 are provided at a certain distance apart at the bottom of any rotating plate 32. The synchronous belt 331 is passed through the two limit rods 321. The limit rods 321 located on the surfaces of the two relatively rotating plates 32 support the synchronous belt 331, and cooperate with the synchronous wheel 33 to support the synchronous belt 331 to be expanded into a triangular shape, and the part of the synchronous belt 331 located between the limit rods 321 on the surfaces of the two relatively rotating plates 32 is pressed against the surface of the anchor rod body 14, and also includes an adjustment assembly for adjusting the distance between the limit rod 321 and the synchronous wheel 33.

[0023] Specifically, when the anchor rod body 14 rotates, the synchronous belt 331 in direct contact with the anchor rod body 14 will be affected by the friction force and driven by the synchronous belt 331, thereby driving the synchronous wheel 33 to rotate. Since the synchronous wheel 33 is threadedly connected to the surface of the threaded rod 311, and the threaded rod 311 is restricted and cannot rotate by the limiting assembly, the threaded cooperation will cause the threaded rod 311 to rise or fall accordingly. Furthermore, the limiting rod 321 is used to limit the synchronous belt 331 and maintain the contact area between the synchronous belt 331 and the anchor rod body 14, thereby improving the stability of the transmission.

[0024] The cam 322 is fixed on the workbench 32 and the cam 323 ... The limiting rod 321 is close to or away from the synchronous wheel 33. In this way, under the premise that the length of the synchronous belt 331 is determined and the deformation amount is negligible, when the limiting rod 321 is away from the synchronous wheel 33, the synchronous belt 331 can be synchronously stretched and tightened, and further adhered to the surface of the anchor rod body 14, so as to adapt to anchor rod bodies 14 of different sizes. In addition, when the anchor rod body 14 is drilled into the anchor hole and does not need to be pulled out, the propulsion rod 323 can be retracted accordingly to relax the synchronous belt 331, and can be driven away from the anchor rod body 14 by the limiting rod 321, so that the synchronous belt 331 does not contact the anchor rod body 14, thereby avoiding affecting the normal drilling of the anchor rod.

[0025] like Figure 7 As shown, in this embodiment, a trigger assembly is further included, which is arranged at the bottom of the hydraulic cylinder 2. The trigger assembly includes a groove opened in the output end of the hydraulic cylinder 2, and an extrusion block 21 is slidably connected in the groove. The extrusion block 21 is connected to the hydraulic cylinder 2 through a spring 211, and the two ends of the spring 211 are fixedly connected to the extrusion block 21 and the hydraulic cylinder 2 respectively. A distance sensor 22 is also installed in the groove, and the distance sensor 22 is electrically connected to the push rod 323. In the conventional anchor rod drilling state, the extrusion block 21 is completely stuck in the groove.

[0026] Specifically, when drilling into the anchor, it is necessary to support the machine body 1 by placing a hydraulic cylinder 2 on the ground. At this time, under the action of the deadweight of the entire device, the reverse thrust provided by the ground presses the extrusion block 21 completely into the groove and compresses the spring 211. At this time, the distance sensor 22 senses that the distance between it and the extrusion block 21 is a normal signal, and the anchor can be drilled normally. Under this normal signal, the distance sensor 22 transmits the signal to the propulsion rod 323, and the controller in the propulsion rod 323 controls the propulsion rod 323 to retract. The synchronous belt 331 is relaxed at this time and does not contact the anchor body 14. When the anchor is stuck and the anchor needs to be pulled out, the hydraulic cylinder 2 is retracted. When the anchor and the deadweight of the entire device can no longer pull out the anchor, the hydraulic cylinder 2 is retracted. The output end of the hydraulic cylinder 2 will leave the ground due to the anchor being stuck, causing the entire device to be suspended in the air. Under the action of the rebound force of the spring 211, the extrusion block 21 is pushed out of the groove. Furthermore, the extrusion block 21 is staggered with the distance sensor 22 and no longer blocks the surface of the distance sensor 22. The distance sensor 22 senses the distance change, and this changed distance is a retraction signal, that is, the state of the anchor rod needs to be pulled out. Under the retraction signal, the distance sensor 22 transmits the signal to the propulsion rod 323, and the controller in the propulsion rod 323 controls the output of the propulsion rod 323, pushing the limit rod 321 to move toward the direction close to the anchor rod body 14, and stretching the taut synchronous belt 331 to make it close to the surface of the anchor rod body 14, and then performing subsequent anchor pushing and pulling operations.

[0027] In one embodiment, the limit assembly includes a sleeve 31 fixedly connected to the top of the mounting block 3, the sleeve 31 is sleeved on the surface of the threaded rod 311, and a limit groove 312 is provided on the surface of the threaded rod 311. The inner wall of the sleeve 31 is provided with a limit bar 313 adapted to the limit groove 312, the limit bar 313 is engaged with the limit groove 312, and the limit bar 313 can slide in the limit groove 312, and the synchronous wheel 33 rotates at the top of the sleeve 31. Through the engagement of the limit bar 313 with the limit groove 312, the threaded rod 311 can only slide up and down in the sleeve 31 and cannot rotate. When the synchronous wheel 33 rotates at the top of the sleeve 31, the threaded rod 311 threadedly matched with the synchronous wheel 33 can slide up and down stably.

[0028] It also includes an auxiliary component, which includes an adjustment plate 34 arranged between the two rotating plates 32. An adjustment groove adapted to the adjustment plate 34 is opened between the two rotating plates 32, and the adjustment plate 34 abuts against the inner wall of the adjustment groove. A number of protrusions 341 are fixedly connected on both sides of the adjustment plate 34, and the adjustment plate 34 slides in the mounting block 3. After the two rotating plates 32 are hinged to each other, they are sleeved on the surface of the threaded rod 311. When the protrusion 341 abuts against the inner wall of the adjustment groove, the angle at the hinge of the two rotating plates 32 becomes larger.

[0029] Specifically, the protrusions 341 on both sides of the adjustment plate 34 make the width of the adjustment plate 34 larger at this position. In the normal state, the two sides of the adjustment plate 34 abut against the adjustment groove, and the two rotating plates 32 are in a normal state. When the adjustment plate 34 moves up and down, the protrusions 341 on its surface slide until they are stuck in the adjustment groove, which will open the adjustment groove due to its larger width, thereby causing the two rotating plates 32 to move away from each other. Since one end of the two rotating plates 32 is hinged together, the angle between the two rotating plates 32 becomes larger, such as Figure 2 and Figure 3 Compared with the state of , as the angle between the two rotating plates 32 becomes larger, the outward expansion will cause the synchronous belt 331 to move the limit rods 321 away from each other, and continue to stretch the synchronous belt 331, so that the synchronous belt 331, which originally had a certain arc in contact with the anchor rod body 14, is stretched to a nearly straight shape, and the anchor rod body 14 is pushed outward by the synchronous belt 331, giving the anchor rod body 14 a certain outward thrust, causing it to shake, and cooperating with the rotation of the anchor rod body 14 and the outward pulling force, further loosening the anchor rod body 14, making it easier to detach from the anchor hole.

[0030] A tension spring 324 is provided between the two rotating plates 32, and the two ends of the tension spring 324 are fixedly connected to the two rotating plates 32. Through the tension of the tension spring 324, the two rotating plates 32 always have a force to move closer to each other. After the two rotating plates 32 are expanded outward by the protrusion 341, the adjusting plate 34 is continuously moved, and after the protrusion 341 is disengaged from the adjusting groove, the two rotating plates 32 can be pulled back to the initial position in time under the action of the rebound force of the tension spring 324, and the adjusting plate 34 with multiple protrusions 341 on the surface moves to achieve the effect of intermittently shaking the anchor rod body 14.

[0031] The top and bottom of the adjusting plate 34 are fixedly connected with a connecting plate 314, and the connecting plate 314 is rotatably connected to the threaded rod 311. Through the setting of the connecting plate 314, the up and down movement of the threaded rod 311 is synchronized with the adjusting plate 34, so that the up and down activities of the adjusting plate 34 are synchronized with the threaded rod 311 at the same time. During the process of withdrawing the anchor and pulling the anchor, the anchor rod body 14 can be shaken to improve the effect of withdrawing the anchor.

[0032] A drive motor is installed in the body 1. The drive motor is a servo motor. The output end of the drive motor is connected to the connector 13. The output of the drive motor drives the connector 13 and the anchor body 14 to rotate. It can be used not only in the process of driving the anchor, but also in the process of retracting the anchor.

[0033] Two handles 12 are fixedly connected to the surface of the body 1, and the handles 12 are convenient for lifting the entire device and adjusting or moving the device.

[0034] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coal mine hydraulic anchor drilling machine, comprising a machine body (1), an operating arm (11), a hydraulic cylinder (2) and a joint (13), wherein an anchor body (14) is mounted on the top of the joint (13), characterized in that: A mounting block (3) is provided on one side of the machine body (1), a threaded rod (311) is provided in the mounting block (3), the threaded rod (311) is connected to the mounting block (3) via a limiting assembly, the limiting assembly prevents the threaded rod (311) from rotating around its axis, a synchronous wheel (33) is threadedly connected to the surface of the threaded rod (311), a synchronous belt (331) is sleeved on the surface of the synchronous wheel (33), and the synchronous belt (331) is connected to the anchor rod body (14) via a positioning assembly; When the anchor rod body (14) rotates, the synchronous belt (331) is driven to rotate the synchronous wheel (33), so that the threaded rod (311) threadedly engaged with the synchronous wheel (33) moves back and forth in the mounting block (3).

2. A coal mine hydraulic anchor drilling rig according to claim 1, characterized in that: The positioning assembly includes two rotating plates (32) mounted on top of the synchronous wheel (33), and two limiting rods (321) spaced a certain distance apart are provided at the bottom of any of the rotating plates (32). The synchronous belt (331) is passed through and wound between the two limiting rods (321) and pressed against the surface of the anchor rod body (14); It also includes an adjustment component for adjusting the distance between the limiting rod (321) and the synchronous wheel (33).

3. A coal mine hydraulic anchor drilling rig according to claim 2, characterized in that: The adjustment assembly includes a movable plate (322), the movable plate (322) slides in the rotating plate (32), and the two limiting rods (321) are both rotatably connected to the surface of the movable plate (322), and a propulsion rod (323) is fixedly connected in the rotating plate (32), and the output end of the propulsion rod (323) is fixedly connected to one side of the movable plate (322).

4. A coal mine hydraulic anchor drilling rig according to claim 3, characterized in that: The invention also includes a trigger assembly, which is arranged at the bottom of the hydraulic cylinder (2). The trigger assembly includes a groove opened in the output end of the hydraulic cylinder (2). An extrusion block (21) is slidably connected in the groove. The extrusion block (21) is connected to the hydraulic cylinder (2) through a spring (211). A distance sensor (22) is also installed in the groove. The distance sensor (22) is electrically connected to the propulsion rod (323). In the conventional anchor rod drilling state, the extrusion block (21) is completely stuck in the groove.

5. The coal mine hydraulic anchor drilling rig according to claim 1, characterized in that: The limiting assembly comprises a sleeve (31) fixedly connected to the top of the mounting block (3); the sleeve (31) is sleeved on the surface of the threaded rod (311); a limiting groove (312) is provided on the surface of the threaded rod (311); a limiting strip (313) adapted to the limiting groove (312) is provided on the inner wall of the sleeve (31); and the synchronous wheel (33) rotates on the top of the sleeve (31).

6. A coal mine hydraulic anchor drilling rig according to any one of claims 1 to 5, characterized in that: The invention also includes an auxiliary component, which includes an adjustment plate (34) arranged between two rotating plates (32). An adjustment groove adapted to the adjustment plate (34) is provided between the two rotating plates (32). A plurality of protrusions (341) are fixedly connected to both sides of the adjustment plate (34). After the two rotating plates (32) are hinged to each other, they are sleeved on the surface of the threaded rod (311). When the protrusions (341) abut against the inner wall of the adjustment groove, the angle at the hinge of the two rotating plates (32) becomes larger.

7. A coal mine hydraulic anchor drilling rig according to claim 6, characterized in that: A tension spring (324) is provided between the two rotating plates (32), and both ends of the tension spring (324) are respectively fixedly connected in the two rotating plates (32).

8. The coal mine hydraulic anchor drilling rig according to claim 6, characterized in that: The top and bottom of the adjustment plate (34) are both fixedly connected to a connecting plate (314), and the connecting plate (314) is rotatably connected to the threaded rod (311).

9. The coal mine hydraulic anchor drilling rig according to claim 1, characterized in that: A drive motor is installed in the machine body (1), and an output end of the drive motor is connected to a connector (13).

10. The coal mine hydraulic anchor drilling rig according to claim 1, characterized in that: Two handles (12) are fixedly connected to the surface of the body (1).

Images