A pressure relief drilling fast drill device

Abstract

The utility model discloses a kind of quick drill pulling device of pressure-relief drilling, including drill sleeve assembly, drill rig head is connected by drill sleeve assembly, when pulling drill, power is provided by the movement of drill rig head;Claw assembly, the claw assembly is rotatably installed with the drill sleeve assembly, when pulling drill, through the claw assembly and stop drill rod;The device can be connected with drill rig head, and is inserted safety bolt for connection, connection is relatively fast, can be stopped in the slot of the body of drill rod through the clamping groove, realize fast clamping, then retract through drill rig head, complete fast drill pulling, entire operation work is in about 1 minute, efficiency is higher, the structure of the device is simple, low in cost, and is suitable for use widely.

Description

Technical Field

[0001] This utility model relates to a pressure-relief drilling and rapid drill bit extraction device. Background Technology

[0002] Coal, as my country's primary energy source, occupies a vital position in the national economy. The energy structure dominated by coal is unlikely to change significantly in the coming decades. With the increasing intensity of coal mining, shallow resources are gradually being depleted, and coal development is rapidly shifting towards deeper, more complex geological conditions. This has led to the development of complex and challenging roadways, such as those at depths of thousands of meters with high ground stress, those in extremely fractured surrounding rock, those with extra-large cross-sections, those heavily impacted by mining, and those left along the goaf. Given the increasingly complex geological conditions and the growing instability of ground pressure, maintaining stable roadway pressure and preventing rockbursts has become a prominent issue. In rockburst mine on-site management measures, large-diameter pressure relief boreholes are the primary means of pressure relief. However, this involves a large amount of work, and after drilling the pressure relief holes, drill rod removal is required. Currently, the method of fixing the drill rod with the drill rig's pusher and then manually removing the drill rod fixing pin is cumbersome, taking 5-10 minutes, and is time-consuming, labor-intensive, and inefficient.

[0003] Based on the above problems, we designed a pressure-relief drilling rapid rod removal device that can achieve rapid rod removal. Utility Model Content

[0004] The purpose of this invention is to provide a pressure-relief drilling quick-pull device that can achieve rapid drill bit removal.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pressure-relief drilling and rapid drill bit extraction device includes,

[0007] The drill bushing assembly is connected to the drill rig head and provides power through the movement of the drill rig head when the drill bit is pulled out.

[0008] The jaw assembly is rotatably mounted to the drill bushing assembly and clamps the drill rod during drill rod extraction.

[0009] Preferably, the drill bushing assembly includes a body having a socket for inserting into the drill bit head, and a rotating part is machined at the end of the body, which rotates and engages with the chuck assembly.

[0010] Preferably, a pin hole is radially penetrating the outer wall of the body, and a safety pin is inserted through the pin hole. When the rod is pulled out, if the pulling force exceeds the safety value, the safety pin breaks.

[0011] Preferably, the claw assembly includes a clamping plate and a support body. The rotating part is inserted into the upper end of the support body, and a pin is fitted between the rotating part and the support body. The diameter of the pin is larger than the diameter of the safety pin. When the pulling force exceeds the safety value, the breakage occurs at the safety pin. The safety pin and the pin are made of the same material, high-strength carbon structural steel. A receiving groove is machined at the bottom of the support body, and slots are machined on both sides of the receiving groove. The clamping plate is inserted into the slot, and the clamping plate has a clamping groove for clamping the drill rod.

[0012] Preferably, the diameter of the safety pin is 6mm to 8mm.

[0013] Preferably, the diameter of the pin is 10-14 mm.

[0014] Preferably, a positioning opening is machined at the center position on both sides of the card plate, and positioning screws are screwed into both sides of the bracket body, with the end of the positioning screw inserted into the positioning opening after being screwed in.

[0015] Preferably, the bottom of the slot is rounded to form a positioning groove for positioning the positioning rod, the curvature of the positioning groove is 1π, and the center of the positioning groove is on the same straight line as the positioning openings at both ends.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This device can be connected to the drill bit head via a safety pin insertion, which is relatively quick. It can quickly lock into place by inserting a slot into the groove on the drill rod. Then, the drill bit is quickly pulled out by retracting the drill bit head. The entire operation takes about 1 minute and is highly efficient. This device has a simple structure, low cost, and is suitable for widespread use. Attached Figure Description

[0018] Figure 1 This is the front view of the device;

[0019] Figure 2 This is a schematic diagram of the device when the drill rod is stuck.

[0020] Figure 3 This is a side view of the drill bushing assembly;

[0021] Figure 4 This is a bottom view of the drill bushing assembly;

[0022] Figure 5 This is the front view of the support structure;

[0023] Figure 6 This is a top view of the claw component;

[0024] Figure 7This is a top view of the card plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please refer to Figure 1 and Figure 2 As shown, this utility model is a pressure-relief drilling quick-pull-out device, comprising,

[0027] Drill bushing assembly 1 is connected to the drill rig head and provides power through the movement of the drill rig head when the drill bit is pulled out.

[0028] The jaw assembly 2 is rotatably mounted to the drill sleeve assembly 1, and the jaw assembly 2 clamps the drill rod when the drill is pulled out.

[0029] See Figure 3 , Figure 4 and Figure 5 As shown, the drill bushing assembly 1 includes a body 11, which has an insertion hole 111 for inserting into the drill bit. A rotating part 12 is machined at the end of the body 11, and the rotating part 12 is rotatably engaged with the chuck assembly 2.

[0030] See Figure 5 As shown, a pin hole 13 is radially penetrated through the outer wall of the body 11. A safety pin 14 is inserted through the pin hole 13. When the rod is pulled out, if the pulling force exceeds the safety value, the safety pin 14 will break.

[0031] The safety pin 14 can break when the load is too high, thus providing overload protection.

[0032] See Figure 5 , Figure 6 and Figure 7As shown, the claw assembly 2 includes a clamping plate 21 and a support body 22. The rotating part 12 is inserted into the upper end of the support body 22. A pin 23 is fitted between the rotating part 12 and the support body 22. The diameter of the pin 23 is larger than the diameter of the safety pin 14. When the pulling force exceeds the safety value, the breakage occurs at the safety pin 14. The safety pin 14 and the pin 23 are made of the same material, both being high-strength carbon structural steel. A receiving groove 24 is machined at the bottom of the support body 22. Slots 25 are machined on both sides of the receiving groove 24. The clamping plate 21 is inserted into the slot 25. The clamping plate 21 has a clamping groove 26 for clamping the drill rod.

[0033] In the above technical solution, a replaceable clamping plate 21 is used. When the clamping groove 26 of the clamping plate 21 is worn and cannot clamp the drill rod, the device can be quickly repaired by replacing the clamping plate 21.

[0034] In this embodiment, the diameter of the safety pin 14 is 6mm.

[0035] In this embodiment, the diameter of the pin 23 is 12mm.

[0036] See Figure 5 , Figure 6 and Figure 7 As shown, positioning holes 211 are machined at the center positions on both sides of the card plate 21, and positioning screws 221 are screwed into both sides of the bracket body 22. After the positioning screws 221 are screwed in, their ends are inserted into the positioning holes 211.

[0037] This technical solution can effectively locate the position of the card plate 21, ensuring that the position of the card plate 21 is accurate.

[0038] See Figure 7 As shown, the bottom end of the slot 26 is rounded to form a positioning groove 261 for positioning the rod. The curvature of the positioning groove 261 is 1π. The center of the positioning groove 261 is on the same straight line as the positioning openings 211 at both ends.

[0039] The positioning groove 261 can fit against the outer wall of the drill rod, increasing the contact area and improving stability when pulling the drill rod.

[0040] The workflow is divided into three stages:

[0041] Preparation stage: The drilling rig head is pushed forward to make the insertion hole 111 engage with the drilling rig positioning pin, and the slot 26 locks the drill rod.

[0042] Clamping stage: The machine head drives the claw assembly 2 to move, and the slot 26 forms a self-locking clamp with the drill rod.

[0043] Unloading stage: When the pull-out force is greater than 14kN, the safety pin 14 breaks.

[0044] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure-relief drilling and rapid drill bit extraction device, characterized in that, include, The drill bushing assembly (1) is connected to the drill head and provides power by moving the drill head when the drill bit is pulled out. The jaw assembly (2) is rotatably mounted with the drill sleeve assembly (1). When the drill rod is pulled out, the jaw assembly (2) holds the drill rod in place. The drill bushing assembly (1) includes a body (11), which has a socket (111) for inserting into the drill head. A rotating part (12) is machined at the end of the body (11), and the rotating part (12) is rotatably engaged with the jaw assembly (2). A pin hole (13) is radially penetrated through the outer wall of the main body (11), and a safety pin (14) is inserted through the pin hole (13). When the rod is pulled out, if the pulling force exceeds the safety value, the safety pin (14) will break. The claw assembly (2) includes a clamping plate (21) and a support body (22). The rotating part (12) is inserted into the upper end of the support body (22). A pin (23) is fitted between the rotating part (12) and the support body (22). The diameter of the pin (23) is larger than the diameter of the safety pin (14). When the pulling force exceeds the safety value, the breakage occurs at the safety pin (14). The safety pin (14) and the pin (23) are made of the same material, which is high-strength carbon structural steel. The bottom of the support body (22) is machined to form a receiving groove (24). Slots (25) are machined on both sides of the receiving groove (24). The clamping plate (21) is inserted into the slot (25). The clamping plate (21) has a clamping groove (26) for clamping the drill rod.

2. The pressure-relief drilling and rapid rod extraction device according to claim 1, characterized in that, The diameter of the safety pin (14) is 6mm to 8mm.

3. The pressure-relief drilling and rapid rod extraction device according to claim 2, characterized in that, The diameter of the pin (23) is 10~14mm.

4. The pressure-relief drilling and rapid rod extraction device according to claim 1, characterized in that, Positioning openings (211) are machined at the center of both sides of the card plate (21), and positioning screws (221) are screwed into both sides of the bracket body (22). After the positioning screws (221) are screwed in, their ends are inserted into the positioning openings (211).

5. The pressure-relief drilling quick-pull-out device according to claim 4, characterized in that, The bottom of the slot (26) is rounded to form a positioning groove (261) for positioning the rod. The arc of the positioning groove (261) is 1π. The center of the positioning groove (261) is on the same straight line as the positioning ports (211) at both ends.

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