A down-the-hole drill hoisting clamp

Abstract

The utility model provides a kind of down-the-hole drill hoisting clamp, including support shaft, support shaft bottom is equipped with at least two and its radial arrangement's strip-shaped seat, each strip-shaped seat is slidably sleeved with slide, slide and strip-shaped seat are fixed by locking device, the both sides of each slide are rotatably installed with V-shaped support arm, the bottom of each group's V-shaped support arm is connected with first mounting seat, the side of first mounting seat close to support shaft is equipped with arc clamping seat, the top between each group's V-shaped support arm is rotatably equipped with second mounting seat.The utility model is when using, arc clamping seat can freely move when hoisting drill bit, so that each arc clamping seat can hoist different thickness drill bit, wide use range, and multiple arc clamping seats simultaneously hold drill bit, can effectively fix drill bit, the weight of drill bit is evenly distributed on each strip-shaped seat, so that the hoisting capacity of the clamp proposed in the present application is large, and the drill bit with relatively large weight can be lifted.

Description

Technical Field

[0001] This utility model relates to the field of drill bit lifting fixture technology, specifically a down-the-hole drill bit lifting fixture. Background Technology

[0002] Down-the-hole (DH) drill bits, as one of the core tools for hard rock drilling, are mainly used in open-pit and underground engineering drilling, side pile support, geothermal well drilling, subway engineering excavation, geological exploration, and other fields. There are many types of DH drill bits, and different models vary significantly in weight. For heavy and bulky drill bits, hoisting operations are required during installation, as they cannot be moved manually. For example, DH drill bits come in many varieties, with head diameters ranging from 70 mm to 3000 mm and weights ranging from a few kilograms to tens of tons.

[0003] For example, the specification of a down-the-hole drill bit lifting fixture proposed in document number "CN218642241U" states in paragraph

[0043] that "before use, the battery 21 is charged through the charging interface 16 to fully charge the battery 21. During use, the lower side of the lifting fixture is pressed against the end face of the down-the-hole drill bit to be lifted, and the switch 18 is pressed to energize it, causing the electromagnet to be charged and attract the down-the-hole drill bit; then, the lifting lug 19 is hooked by the lifting equipment to lift the down-the-hole drill bit, thus realizing the transfer of the down-the-hole drill bit." However, the method of generating attraction force by energizing the electromagnet through the battery 21 has significant drawbacks, because the contact area between the top of the drill rod and the electromagnet is limited, the attraction process is extremely unstable, and the drill bit is heavy, so this method may not be able to lift the drill bit. Therefore, we propose a down-the-hole drill bit lifting fixture. Utility Model Content

[0004] This utility model provides a down-the-hole drill bit lifting fixture, which has the advantages of conveniently clamping the drill bit and lifting heavy loads, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: A down-the-hole drill bit lifting fixture is designed, including a support shaft. At least two strip seats are provided at the bottom of the support shaft and arranged radially thereto. A slide seat is slidably fitted on each strip seat. The slide seat and the strip seat are fixed by a locking device. V-shaped support arms are rotatably installed on both sides of each slide seat. The bottom of each group of V-shaped support arms is connected to a first mounting seat. An arc-shaped card seat is provided on the side of the first mounting seat near the support shaft. A second mounting seat is rotatably installed between the tops of each group of V-shaped support arms. The fixture also includes a lifting mechanism slidably installed on the support shaft. Each second mounting seat and the lifting mechanism are connected by a metal chain.

[0006] Preferably, the arc-shaped bracket is provided with fixing bolts on the side away from the support shaft. The fixing bolts move through the first mounting base and are fixed by fasteners.

[0007] Preferably, the locking device includes an adjustment groove provided on each strip seat, the adjustment groove being radially arranged with the support shaft, and a fixing seat corresponding to the position of the adjustment groove provided on each strip seat, the fixing seat being fixed to the adjustment groove by a locking member.

[0008] Preferably, the lifting mechanism includes a sleeve movably fitted on the support shaft, with a hanging ring at the top of the sleeve and a metal chain connecting the side of the sleeve.

[0009] Preferably, the top of each metal chain is connected to the connecting seat via a buckle, the connecting seat being located on the side of the sleeve, and the bottom of each metal chain is connected to the connecting ring via a buckle, the connecting ring being installed on each of the second mounting seats.

[0010] Preferably, there is a certain gap between the sleeve and the strip seat. A conical seat is coaxially provided on the support shaft below the sleeve, and a guide plate is movably sleeved on the support shaft below the conical seat. Both ends of the guide plate are conical structures. At least two hooks are rotatably provided on the bottom side of the sleeve. The bottom of the hooks extends to the bottom of the sleeve, and each hook has a guide slope at the bottom. Under the action of its own weight, the hooks always tend to move towards the support shaft. When the hooks are hooked under the conical seat, the metal chain is in a slack state.

[0011] Preferably, the bottom of the conical seat is provided with a conical cavity, and when the guide plate rises, its top is placed in the conical cavity.

[0012] Compared with the prior art, the present invention allows the arc-shaped chucks to move freely when hoisting drill bits, enabling each arc-shaped chuck to hoist drill bits of different diameters, thus having a wide range of applications. Moreover, the simultaneous clamping of multiple arc-shaped chucks can effectively fix the drill bit, and the weight of the drill bit is evenly distributed on each strip seat, making the clamp proposed in this application have a large hoisting capacity, that is, it can hoist drill bits with a large weight. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention in conjunction with a down-the-hole drill bit.

[0015] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 3 This is the main view of the present invention in conjunction with a down-the-hole drill bit. Figure 1 .

[0017] Figure 4 This is the main view of the present invention in conjunction with a down-the-hole drill bit. Figure 2 .

[0018] Figure 5 This is a schematic diagram of the structure of the strip seat of this utility model. Figure 1 .

[0019] Figure 6 This is a schematic diagram of the structure of the strip seat of this utility model. Figure 2 .

[0020] In the diagram: 1. Adjustment groove; 2. Fixed seat; 3. Slide seat; 4. Guide plate; 5. Conical seat; 6. Hanging ring; 7. Sleeve; 8. Connecting seat; 9. Hook; 10. Metal chain; 11. Support shaft; 12. V-shaped support arm; 13. Strip seat; 14. Conical cavity; 15. Arc-shaped clamp; 16. First mounting seat; 17. Second mounting seat; 18. Connecting ring; 19. Fixing bolt; 20. Guide slope. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Reference Figures 1 to 6 This utility model provides a technical solution: a down-the-hole drill bit lifting fixture, including a support shaft 11, at least two radially arranged strip seats 13 are provided at the bottom of the support shaft 11, and a slide seat 3 is slidably sleeved on each strip seat 13. The slide seat 3 has a "U-shaped" structure, and its inner cavity size matches that of the strip seat 13. The two are fitted with a clearance, so that the slide seat 3 can move back and forth in a straight line along the strip seat 13, thereby changing the distance between the slide seat 3 and the support shaft 11. After the position of slide 3 is adjusted, it needs to be locked. Both slide 3 and strip seat 13 need to be secured using locking devices. Figure 5 and Figure 6 As shown, the locking device includes an adjustment groove 1 provided on each strip seat 13. The adjustment groove 1 passes through the upper and lower surfaces of the strip seat 13 and is radially arranged with the support shaft 11. Each strip seat 13 is provided with a fixed seat 2 whose position corresponds to the adjustment groove 1. The fixed seat 2 is placed on the top of the strip seat 13 and is fixed to the adjustment groove 1 by a locking member. The locking member is a bolt that is movably arranged in the fixed seat 2. After the bolt passes through the adjustment groove 1, it can be locked by a nut.

[0023] like Figure 2 As shown, V-shaped support arms 12 are rotatably mounted on both sides of each slide 3. Specifically, the bent part of the V-shaped support arm 12 is rotatably mounted on the slide 3 via a shaft. The openings of the V-shaped support arms 12 all face the support shaft 11. The bottom of each set of V-shaped support arms 12 is connected to the first mounting seat 16. The side of the first mounting seat 16 near the support shaft 11 is provided with an arc-shaped retainer 15. The shape of the arc-shaped retainer 15 matches the surface shape of the drill rod of the down-the-hole drill bit. The arc-shaped retainer 15 is used to be locked in the groove on the surface of the drill rod. Next, a second mounting base 17 is rotatably provided between the tops of the V-shaped support arms 12 in each group. Specifically, the two sides of the second mounting base 17 are rotatably mounted together with the top of the V-shaped support arm 12 via a shaft, allowing the second mounting base 17 to rotate.

[0024] Furthermore, the bottom of the V-shaped support arm 12 extends below the strip seat 13, and the top of the V-shaped support arm 12 extends above the strip seat 13. When the top of the V-shaped support arm 12 is lifted upwards, the bottom of the V-shaped support arm 12 will cause the arc-shaped bracket 15 to move closer to the support shaft 11. In order to enable all the V-shaped support arms 12 to move synchronously, a lifting mechanism is slidably provided on the support shaft 11. Each second mounting seat 17 is connected to the lifting mechanism through a metal chain 10, so that the lifting mechanism drives the metal chain 10 to lift up, so that the metal chain 10 lifts each V-shaped support arm 12 at the same time. The following explains the lifting mechanism, such as... Figure 1 and Figure 2 As shown, the lifting mechanism specifically includes a sleeve 7 movably fitted onto the support shaft 11. The top of the sleeve 7 is equipped with a hanging ring 6, which is a U-shaped structure with an open end for detachment. The hanging ring 6 is used to connect with lifting devices such as cranes. The side of the sleeve 7 is connected to the metal chain 10. It should be noted that when the metal chain 10 reaches its highest point, the sleeve 7 remains fitted onto the support shaft 11; that is, the sleeve 7 always slides along the support shaft 11 and will not detach from it. like Figure 2 As shown, the top of each metal chain 10 is connected to the connecting seat 8 via a buckle. The connecting seat 8 has a hanging hole and is located on the side of the sleeve 7. The bottom of each metal chain 10 is connected to the connecting ring 18 via a buckle. The connecting ring 18 is installed on each of the second mounting seats 17, specifically positioned in the middle of the second mounting seat 17. It should be emphasized that the buckles connected to both ends of the metal chain are leash buckles, safety buckles, etc., which are easy to open and close. When the slide 3 slides along the strip seat 13, the length of the metal chain 10 may need to be adjusted depending on the actual situation. In this case, the buckle at one end of the metal chain 10 can be opened, released to the preset length, and then the buckle can be fastened into the corresponding chain link, facilitating the adjustment of the metal chain 10.

[0025] Furthermore, such as Figure 3 As shown, there is a certain gap between the sleeve 7 and the strip seat 13. A conical seat 5 is coaxially provided on the support shaft 11 below the sleeve 7. The top diameter of the conical seat 5 is small and the bottom diameter is large. A guide plate 4 is movably sleeved on the support shaft 11 below the conical seat 5. Both ends of the guide plate 4 are conical structures, and the conical structure matches the bottom diameter of the conical seat 5. At least two hooks 9 are provided on the bottom side of the sleeve 7. The bottom of the hooks 9 extends below the sleeve 7 and each hook 9 is provided with a guide slope 20. The guide slope 20 corresponds to the slope of the tapered seat 5 and the guide plate 4. Under the action of its own gravity, the hooks 9 always tend to move towards the support shaft 11, that is, the hooks 9 are always in close contact with the surface of the support shaft 11. When hook 9 is engaged below conical seat 5, metal chain 10 is in a slack state, allowing each V-shaped boom 12 to rotate freely. At this point, the lifting clamp can be positioned... Figure 3 It is placed above the top of the down-the-hole drill bit, and the top of the down-the-hole drill bit supports the bottom of the support shaft 11; During lifting, the sleeve 7 moves downward along the support shaft 11, allowing the hook 9 to engage with the guide plate 4, and then the sleeve 7 is lifted upward, as shown. Figure 4 As shown, the sleeve 7 drives the hook 9 to lift the guide plate 4. Figure 3 As shown, a conical cavity 14 is provided at the bottom of the conical seat 5. When the guide plate 4 rises, its top is placed in the conical cavity 14. At this time, the hook 9 will slide along the surface of the guide plate 4 to the surface of the conical seat 5, allowing the hook 9 to fall off the conical seat 5 smoothly. At this time, the sleeve 7 can stretch each metal chain 10, allowing each arc-shaped card seat 15 to be locked in the groove of the down-the-hole drill bit, thus lifting the down-the-hole drill bit.

[0026] Based on the above embodiments, it should be further explained that, as Figure 1 and Figure 2 As shown, there are at least three strip seats 13, so that three arc-shaped chucks 15 can be clamped on the drill pipe at the same time. Moreover, the heavier the drill bit, the greater the pressure of the arc-shaped chucks 15 on the drill bit, thus making the arc-shaped chucks 15 clamp the drill bit more tightly. By having multiple arc-shaped chucks 15 clamp the drill bit simultaneously, the drill bit can be effectively fixed and stably lifted. Moreover, the weight of the drill bit is evenly distributed on each strip seat 13, which makes the clamp proposed in this application have a large lifting capacity, that is, it can lift heavy drill bits.

[0027] Based on the above embodiments, it should be further explained that in actual application, different models of drill bits have different drill rod diameters. When hoisting a larger drill bit, it is necessary to replace it with a different arc-shaped chuck 15 to meet the requirements of lifting the drill bit. Therefore, the arc-shaped chuck 15 is designed as a detachable structure, that is, a fixing bolt 19 is provided on the side of the arc-shaped chuck 15 away from the support shaft 11. The fixing bolt 19 moves through the first mounting seat 16 and the two are fixed by fasteners, which are nuts, to facilitate the replacement of the arc-shaped chuck 15.

[0028] Based on the above embodiments, it should be further explained that in actual use, the sleeve 7 is pulled by multiple metal chains 10 at the same time and will not deflect. However, in order to increase the stability of the sleeve 7, at least one groove parallel to its axis can be opened on the inner wall of the sleeve 7, and a bar key that cooperates with the groove is provided on the surface of the support shaft 11 near the top. The bar key is placed in the groove.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A down-the-hole drill bit lifting fixture, comprising a support shaft (11), wherein at least two radially arranged strip seats (13) are provided at the bottom of the support shaft (11), characterized in that, Each bar seat (13) is slidably fitted with a slide seat (3), and the slide seat (3) and the bar seat (13) are fixed by a locking device; V-shaped support arms (12) are rotatably mounted on both sides of each slide (3). The bottom of each set of V-shaped support arms (12) is connected to the first mounting seat (16). The side of the first mounting seat (16) near the support shaft (11) is provided with an arc-shaped card seat (15). The top of each set of V-shaped support arms (12) is rotatably provided with a second mounting seat (17). It also includes a lifting mechanism that is slidably mounted on the support shaft (11), and each second mounting base (17) is connected to the lifting mechanism via a metal chain (10).

2. The down-the-hole drill bit lifting fixture as described in claim 1, characterized in that, The arc-shaped bracket (15) is provided with fixing bolts (19) on the side away from the support shaft (11). The fixing bolts (19) are movably inserted into the first mounting base (16) and the two are fixed by fasteners.

3. The down-the-hole drill bit lifting fixture as described in claim 1, characterized in that, The locking device includes an adjustment groove (1) provided on each strip seat (13), the adjustment groove (1) being radially arranged with the support shaft (11); and a fixed seat (2) provided on each strip seat (13) corresponding to the position of the adjustment groove (1), the fixed seat (2) being fixed to the adjustment groove (1) by a locking member.

4. The down-the-hole drill bit lifting fixture as described in claim 2 or 3, characterized in that, The lifting mechanism includes a sleeve (7) that is movably mounted on the support shaft (11), with a hanging ring (6) at the top of the sleeve (7) and the side of the sleeve (7) connected to a metal chain (10).

5. The down-the-hole drill bit lifting fixture as described in claim 4, characterized in that, The top of each metal chain (10) is connected to the connecting seat (8) by a buckle, and the connecting seat (8) is located on the side of the sleeve (7); the bottom of each metal chain (10) is connected to the connecting ring (18) by a buckle, and the connecting ring (18) is installed on each of the second mounting seats (17).

6. The down-the-hole drill bit lifting fixture as described in claim 5, characterized in that, There is a certain gap between the sleeve (7) and the strip seat (13). A conical seat (5) is coaxially provided on the support shaft (11) below the sleeve (7), and a guide plate (4) is movably sleeved on the support shaft (11) below the conical seat (5). Both ends of the guide plate (4) are conical structures. At least two hooks (9) are provided on the bottom side of the sleeve (7). The bottom of the hooks (9) extends below the sleeve (7) and the bottom of each hook (9) is provided with a guide slope (20). Under the action of its own weight, the hooks (9) always tend to move towards the support shaft (11). When the hooks (9) are hooked below the conical seat (5), the metal chain (10) is in a slack state.

7. The down-the-hole drill bit lifting fixture as described in claim 6, characterized in that, The bottom of the conical seat (5) is provided with a conical cavity (14), and when the guide plate (4) rises, its top is placed in the conical cavity (14).

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