A new type of main shaft quick joint of a coal mine drilling machine

Abstract

The utility model relates to the field of coal mine drilling machine joint, especially to a novel main shaft quick joint of coal mine drilling machine, the novel main shaft quick joint of coal mine drilling machine includes: drilling machine joint, the outside symmetry of drilling machine joint is opened and is limited to clamping groove, the outside top fixedly connected with assembly board no.

Description

Technical Field

[0001] This utility model relates to the field of coal mine drilling rig connectors, and in particular to a novel quick connector for the spindle of a coal mine drilling rig. Background Technology

[0002] Coal mines are underground or open-pit areas rich in coal resources, where humans extract coal. Mining involves processes such as excavation and transportation to remove coal from underground or the surface. Drilling rigs are indispensable in coal mines because they are used to drill holes before mining to detect the location, thickness, and quality of coal seams, providing data for mining planning. However, coal mine drilling rigs require frequent drill rod changes during operation, necessitating quick-connect couplings.

[0003] Currently, most quick couplings typically include a drill rig connector (a hollow circle) and a drill pipe connector (a hollow cone). The drill pipe connector has connecting threads on its outer wall for threaded connection with the drill pipe, used for replacing the drill pipe. However, when the drill bit is breaking coal seams and rock formations, it generates strong impacts and high-frequency vibrations. This dynamic load will continuously act on the threaded connection, causing the static friction between the thread teeth to be repeatedly destroyed, increasing the speed of thread loosening, reducing the effective holding time of the threaded connection, and increasing the frequency of downtime inspection.

[0004] Therefore, it is necessary to provide a new type of quick-connect coupling for the spindle of a coal mine drilling rig to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a new type of quick connector for the spindle of a coal mine drilling rig.

[0006] The novel quick-connect coupling for coal mine drilling rigs provided by this utility model includes: a drilling rig connector, with symmetrically arranged limit slots on the outside of the drilling rig connector, an assembly plate one fixedly connected to the top of the outside of the drilling rig connector, a drill rod connector fixedly connected to the top of the drilling rig connector, a sealing gasket provided on the inner wall of the top of the drill rod connector, a drill rod head installed on the outside of the drill rod connector, an assembly plate two fixedly connected to the bottom of the outside of the drill rod head, multiple insert rods inserted into the inner wall of the assembly plate one, two threaded grooves on the outside of the insert rod, a bottom nut threadedly connected to the outside of the insert rod at the position of the bottom threaded groove, a top nut threadedly connected to the outside of the insert rod at the position of the top threaded groove, and a spring-loaded component installed between the bottom nut and the top nut on the outside of the insert rod.

[0007] Preferably, the rebound assembly includes two stop washers, the inner ring walls of the two stop washers and the outer side of the insert rod are in interlocking contact between the bottom nut and the top nut, and a strong spring is sleeved on the outer side of the insert rod between the two stop washers.

[0008] Preferably, the outer top of the sealing gasket contacts the inner wall of the bottom end of the drill bit, and the top of the first assembly plate contacts the bottom end of the second assembly plate.

[0009] Preferably, the inner wall of the second assembly plate is in interpenetrating contact with the outer side of the plurality of insert rods, and the bottom end of the bottom nut is in contact with the top end of the second assembly plate.

[0010] Preferably, the drill rig connector is 12cm long, 7cm outer diameter, and 5cm inner diameter, and the drill rod connector is 5cm long, 4.5cm outer diameter, and 2cm inner diameter.

[0011] Preferably, the top end of the bottom nut contacts the bottom of the bottom stop washer, and the bottom end of the top nut contacts the top of the top stop washer.

[0012] Preferably, the upper and lower ends of the strong spring are fixedly connected to the adjacent side of the two stop washers.

[0013] Compared with related technologies, the novel quick-connect coupling for coal mine drilling rigs provided by this utility model has the following advantages: Significantly improved connection stability: By setting up a rebound assembly consisting of a stop washer and a powerful spring, when the drilling rig generates impact and vibration, the powerful spring can continuously apply preload compensation force to the bottom nut and top nut using its elastic rebound. The stop washer can limit the relative rotation of the nuts, effectively reducing thread loosening and making the quick coupling more stable during drilling operations, thus reducing the frequency of downtime for inspection due to loose connections.

[0014] Superior sealing performance: The sealing gasket installed on the inner wall of the top of the drill pipe joint can accurately contact the inner wall of the bottom end of the drill pipe head when the drill pipe head is connected to the drill pipe joint, which enhances the sealing of the connection. This reduces the entry of dust, water vapor and other substances into the joint during drilling operations, providing better protection for internal components and helping to maintain the working efficiency of the drilling rig.

[0015] More convenient installation and operation: During the assembly process, the insertion rod is inserted into the inner wall of assembly plate one and assembly plate two in sequence, and then fixed by the bottom nut, top nut and spring-loaded component. The steps are clear and easy for the staff to operate. It can quickly complete the connection operation of the drill rod, improve the efficiency of replacing drill rods in coal mine drilling rigs, and thus improve the overall mining operation efficiency. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the novel quick-connect coupling for the spindle of a coal mine drilling rig provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the drilling rig joint. Figure 3 for Figure 1The diagram shows the structure of the drill bit. Figure 4 for Figure 3 Enlarged view of point A in the image.

[0017] The following are labeled in the diagram: 1. Drill rig connector; 2. Limiting slot; 3. Assembly plate one; 4. Drill rod connector; 5. Sealing gasket; 6. Drill rod head; 7. Assembly plate two; 8. Insert rod; 9. Threaded groove; 10. Bottom nut; 11. Top nut; 12. Stop washer; 13. Heavy spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0019] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0020] Please see Figures 1 to 4 A novel quick-connect coupling for a coal mine drilling rig spindle includes: a drilling rig connector 1, which serves as the core component of the entire quick-connect coupling. Symmetrically shaped limiting grooves 2 on its exterior allow for precise engagement with relevant adaptable structures, providing limiting protection for the stable rotation of the connector. An assembly plate 3 is fixedly connected to the top of the drilling rig connector 1. The assembly plate 3 is horizontally positioned with a flat surface. A drill rod connector 4 is fixedly connected to the top of the drilling rig connector 1. The drilling rig connector 1 has a length of 12cm, an outer diameter of 7cm, and an inner diameter of 5cm. This size design ensures sufficient structural strength and internal space. The drill rod connector 4 has a length of 5cm, an outer diameter of 4.5cm, and an inner diameter of 2cm. The total length of the device is 17cm. This design allows for perfect compatibility with φ73mm drill rods and the power shaft connection of this type of coal mine rock drilling rig, enabling the successful completion of 153mm diameter pressure relief drilling using this type of drilling rig, thus meeting the specific drilling operation requirements of coal mines. The inner wall of the top of the drill rod joint 4 is equipped with a sealing gasket 5, which effectively enhances the sealing effect of the connection. The drill rod head 6 is installed on the outside of the drill rod joint 4. The top of the outer end of the sealing gasket 5 is in close contact with the inner wall of the bottom end of the drill rod head 6, which can reduce the entry of dust, water vapor, etc. into the joint during drilling operations. The bottom of the outer end of the drill rod head 6 is fixedly connected to an assembly plate 2 7. The shape and size of the assembly plate 2 7 match those of the assembly plate 1 3, and the top of the assembly plate 1 3 and the bottom of the assembly plate 2 7 can fit together in contact. Multiple insert rods 8 are inserted into the inner wall of the first assembly plate 3. The inner wall of the second assembly plate 7 and the outer side of the multiple insert rods 8 are in interpenetrating contact. The multiple insert rods 8 are evenly distributed, which can stabilize the connection between the first assembly plate 3 and the second assembly plate 7. Two threaded grooves 9 are opened on the outer side of the insert rod 8. A bottom nut 10 is threadedly connected to the outer side of the insert rod 8 at the bottom threaded groove 9. The bottom end of the bottom nut 10 is in close contact with the top end of the second assembly plate 7, which can initially fix the relative position of the insert rod 8 and the second assembly plate 7. A top nut 11 is threadedly connected to the outer side of the insert rod 8 at the top threaded groove 9. The top nut 11 and the bottom nut 10 cooperate with each other to effectively fix the position of the insert rod 8 between the first assembly plate 3 and the second assembly plate 7. The spring-loaded assembly is installed on the outside of the insert rod 8, between the bottom nut 10 and the top nut 11. The spring-loaded assembly includes two retaining washers 12. The top of the bottom nut 10 contacts the bottom of the bottom retaining washer 12, and the bottom of the top nut 11 contacts the top of the top retaining washer 12. The inner ring wall of the two retaining washers 12 is in interlocking contact with the outside of the insert rod 8 between the bottom nut 10 and the top nut 11. A strong spring 13 is sleeved on the outside of the insert rod 8 between the two retaining washers 12. The upper and lower ends of the strong spring 13 are fixedly connected to the adjacent side of the two retaining washers 12, respectively. When vibration occurs during drilling operations, the spring 13 can use its own elasticity to provide pre-tightening compensation force for the threaded connection, reducing the possibility of thread loosening.

[0021] The working principle of the new quick-connect coupling for coal mine drilling rig spindles provided by this utility model is as follows: When connecting drill rods for a coal mine drilling rig, the first step is to prepare and preliminarily align all components. The operator first adjusts the drill rig connector 1 to a suitable working position. At this time, the drill rig connector 1 serves as the basic component of the entire quick connector, providing support for subsequent connection operations. Next, the drill rod head 6 is moved above the drill rod connector 4, so that the mounting plate 2 7 at the bottom of the drill rod head 6 corresponds to the position of the mounting plate 1 3 at the top of the drill rig connector 1. At the same time, it is ensured that the sealing gasket 5 on the inner wall of the top of the drill rod connector 4 can accurately contact the inner wall of the bottom of the drill rod head 6, preparing for the subsequent sealing connection. Then, the insertion of the insert rods 8 is performed. Multiple insert rods 8 are sequentially inserted into the inner walls of assembly plate 1 (3) and assembly plate 2 (7), ensuring the insert rods 8 stably penetrate both assembly plates. After the insert rods 8 are in place, the bottom nut 10 and top nut 11 are installed. First, the bottom nut 10 is threaded onto the outside of the insert rod 8 at the bottom threaded groove 9, ensuring the bottom end of the bottom nut 10 is in close contact with the top end of assembly plate 2 (7), thus initially fixing the relative position of the insert rod 8 and assembly plate 2 (7). Then, the spring-loaded assembly is installed. Two stop washers 12 and a strong spring 13 are fitted onto the outside of the insert rod 8, ensuring the inner ring walls of the two stop washers 12 are in interlocking contact with the outside of the insert rod 8. The upper and lower ring walls of the strong spring 13... Both ends are fixedly connected to the adjacent side of the two stop washers 12, and then the top nut 11 is threadedly connected to the outside of the insertion rod 8 at the position of the top threaded groove 9, so that the bottom end of the top nut 11 contacts the top of the top stop washer 12. During subsequent drilling operations, the elasticity of the strong spring 13 and the limiting effect of the stop washer 12, as well as the rebound of its own elasticity, can continuously apply a pre-tightening compensation force to the bottom nut 10 and the top nut 11. Together with the stop washer 12, it restricts the relative rotation of the nuts, minimizes the loosening of the threads, alleviates the impact of vibration on the threaded connection, ensures the connection stability of the quick connector during operation, and enables the drilling operation to continue.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A new type of main shaft quick joint of a coal mine drilling machine, characterized in that, include: Drilling rig connector (1), with symmetrical limit slots (2) on the outside of the drilling rig connector (1), an assembly plate (3) is fixedly connected to the top of the outside of the drilling rig connector (1), a drill rod connector (4) is fixedly connected to the top of the drilling rig connector (1), a sealing gasket (5) is provided on the inner wall of the top of the drill rod connector (4), a drill rod head (6) is installed on the outside of the drill rod connector (4), and an assembly plate (7) is fixedly connected to the bottom of the outside of the drill rod head (6). Insert rod (8), multiple insert rods (8) are inserted into the inner wall of assembly plate (3), two threaded grooves (9) are opened on the outside of the insert rod (8), a bottom nut (10) is threadedly connected to the outside of the insert rod (8) at the bottom threaded groove (9), and a top nut (11) is threadedly connected to the outside of the insert rod (8) at the top threaded groove (9). The spring-loaded assembly is installed on the outside of the insert (8) between the bottom nut (10) and the top nut (11).

2. The new type of main shaft quick joint of the coal mine drilling machine according to claim 1, characterized in that, The rebound assembly includes two stop washers (12). The inner ring walls of the two stop washers (12) and the outer side of the insert rod (8) are in interlocking contact between the bottom nut (10) and the top nut (11). A strong spring (13) is sleeved on the outer side of the insert rod (8) between the two stop washers (12).

3. The new type of main shaft quick joint of the coal mine drilling machine according to claim 1, characterized in that, The outer top of the sealing gasket (5) contacts the inner wall of the bottom end of the drill bit (6), and the top of the first assembly plate (3) contacts the bottom end of the second assembly plate (7).

4. The novel quick-connect coupling for the spindle of a coal mine drilling rig according to claim 1, characterized in that, The inner wall of the assembly plate 2 (7) is in interlocking contact with the outside of the plurality of said insert rods (8), and the bottom end of the bottom nut (10) is in contact with the top end of the assembly plate 2 (7).

5. The novel quick-connect coupling for the spindle of a coal mine drilling rig according to claim 1, characterized in that, The length of the drill rig connector (1) is 12cm, the outer diameter is 7cm, and the inner diameter is 5cm. The length of the drill rod connector (4) is 5cm, the outer diameter is 4.5cm, and the inner diameter is 2cm.

6. The novel quick-connect coupling for the spindle of a coal mine drilling rig according to claim 2, characterized in that, The top end of the bottom nut (10) contacts the bottom of the bottom stop washer (12), and the bottom end of the top nut (11) contacts the top of the top stop washer (12).

7. The novel quick-connect coupling for the spindle of a coal mine drilling rig according to claim 2, characterized in that, The upper and lower ends of the strong spring (13) are fixedly connected to the adjacent side of the two stop washers (12).

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