Buffering guide piece and automatic rolling bar mechanism for drilling tool throwing

Abstract

The utility model relates to the technical field of well drilling operation, and discloses a buffer guide piece and an automatic rolling bar mechanism for drilling tool throwing, the buffer guide piece comprises a stop lever, one end of the stop lever is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected in a shaft sleeve, the shaft sleeve is fixedly connected to a smooth way, and the stop lever or the rotating shaft is connected with a counterweight assembly. When the stop lever is static, the stop lever is perpendicular to the front-back direction of the smooth way, when the stop lever is pushed by the drill rod to rotate, a balancing weight of the balancing weight assembly ascends, and after the drill rod is separated from the stop lever, the balancing weight of the balancing weight assembly automatically descends and drives the stop lever to reset. The automatic rolling bar mechanism for drilling tool throwing comprises an inclined sliding way and a flat sliding way which are used for guiding a drill rod in sequence, a first guiding device and a second guiding device which are used for guiding the drilling tool in sequence are arranged on the flat sliding way in a front-back spaced mode, and the first guiding device comprises a buffering guiding piece and two sets of first guiding pieces which are symmetrically and fixedly connected to the flat sliding way. The problem that the elastic reset piece cannot be reliably reset after plastic deformation after being used for a period of time is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling operations, in particular to a buffer guide and an automatic rolling bar mechanism for throwing off a drilling tool. Background Art

[0002] Drilling tools are common drilling tools, including drill pipe, drill bit, and reamer. They are used to break and drill holes in rock or soil during exploratory well drilling. Rotating the drill pipe and drill bit creates impact force at the bottom of the well below the wellhead, pushing the drill bit into the formation for drilling. Drilling tools are disassembled from the derrick into individual pieces after drilling footage and cementing operations are completed, and then placed on the pipe rack at the well site.

[0003] After searching, the Chinese utility model patent with announcement number CN219101266U discloses a non-powered catwalk drilling tool device, which includes a guide sliding inclined plate and a guide sliding plate for sliding the drilling tool; it also includes a guide mechanism, which is installed on the upper surface of the guide sliding plate; the guide mechanism is arranged in two groups in parallel, and each group of guide mechanisms includes two guide components arranged opposite to each other along the moving direction of the drilling tool; the two guide components include a fixed end and a sliding end, and the sliding ends of the two guide components are adjacent; the guide component includes a fixed seat, an elastic reset member, a center rod and a moving member; the fixed seat is installed on the upper surface of the guide sliding plate, one end of the elastic reset member is rotatably connected to the fixed seat, and the other end is connected to one end of the center rod; a roller is provided on the outside of the center rod, and the other end of the center rod is connected to the moving member; the moving member contacts the upper surface of the guide sliding plate and can slide on the surface of the guide sliding plate.

[0004] The aforementioned non-powered catwalk drill-tool-swinging device uses a central rod driven by the drill to rotate, which in turn drives the mounting shaft. This shaft then deforms the spring. After the drill tool moves downward a certain distance, it disengages from the guide structure. This spring design is prone to plastic deformation over long periods of operation, resulting in an inability to effectively rebound and providing reliable cushioning and guidance for the drill tool. Utility Model Content

[0005] In view of this, the present application proposes a buffer guide for drilling tools, which can buffer and guide the downward movement of the drill rod. Since no elastic reset part is used, the weight of the counterweight block will not change during use, and the problem of the elastic reset part being unable to be reliably reset after plastic deformation after a period of use will not occur.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A buffer guide comprises a rotating shaft, a baffle rod and a counterweight assembly, one end of the baffle rod is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected in a sleeve, the sleeve is fixedly connected to a smooth path, the baffle rod or the rotating shaft is connected to the counterweight assembly, the baffle rod is perpendicular to the front and rear directions of the smooth path when stationary, when the baffle rod rotates under the push of a drill rod, the counterweight block of the counterweight assembly rises, and when the drill rod is separated from the baffle rod, the counterweight block of the counterweight assembly automatically descends and drives the baffle rod to reset.

[0008] In one embodiment, the counterweight assembly further comprises a steel wire rope, one end of the steel wire rope is connected to the outer surface of the barrier rod, and the other end of the steel wire rope is connected to the counterweight block.

[0009] In one embodiment, the counterweight assembly further comprises a pulley, and the steel wire rope close to the barrier rod passes around the pulley and then through the groove on the smooth path to be connected to the counterweight block located at the bottom of the smooth path.

[0010] In one embodiment, the counterweight assembly includes a bottom support rod fixedly connected to the bottom of the smooth path, the bottom of the bottom support rod is fixedly connected to a rotating sleeve, a winding shaft is rotatably connected inside the rotating sleeve, a steel wire rope is wound on the winding shaft, one end of the steel wire rope is fixedly connected to the winding shaft, and the other end is connected to the counterweight block, the end of the winding shaft is connected to a first bevel gear, and the first bevel gear is meshed with a second bevel gear at the lower end of the rotating shaft passing through the smooth path.

[0011] In one embodiment, a first rotating tube is rotatably sleeved on the outer side of the middle portion of the blocking rod via two first bearings.

[0012] The present invention also provides an automatic roller mechanism for drilling tools, comprising an inclined slide and a smooth track for sequentially guiding drill rods, wherein the rear portion of the smooth track is connected to the lower portion of the inclined slide, and a first guide device and a second guide device for sequentially guiding the drill rods are provided on the smooth track at intervals in front and back, the first guide device comprising the buffer guide member described in any one of the foregoing items and two groups of first guide members symmetrically fixedly connected to the smooth track, the first guide member having an inclined guide surface extending from the side of the smooth track to the middle of the smooth track to centrally guide the drilling tool, an opening for the drill rod to pass through is provided between the projections of the two groups of the first guide members in the front and rear directions, and the blocking rod of the buffer guide member is located at the rear portion of the guide member and blocks the opening.

[0013] In one embodiment, the first guide member includes a first triangular plate, a first side plate and a first bolt, the first triangular plate is threadedly connected to the upper surface of the smooth path through the first bolt, the first side plate is fixedly connected to the hypotenuse side of the first triangular plate, and the inner side surface of the first side plate forms the inclined guide surface.

[0014] In one embodiment, the second guide device includes a second guide member and a third guide member, and the second guide member and the third guide member both have an inclined guide surface extending from the side of the smooth path to the middle of the smooth path. The rear end of the third guide member is farther back than the rear end of the second guide member, and the projections of the third guide member and the second guide member in the front-to-back direction intersect.

[0015] In one embodiment, the inclined guide surface of the third guide member extends toward the middle of the smooth track beyond the center line of the smooth track.

[0016] In one embodiment, the third guide member is a guide rod, and the second guide member includes a second triangular plate, a second side plate, a second bolt, a side support plate, two side support rods, two second bearings and a second rotating tube; the second triangular plate is threadedly connected to the upper surface of the smooth path by the second bolt, and the second side plate is fixedly connected to the hypotenuse side of the second triangular plate, and the inner side surface of the second side plate forms the inclined guide surface; the side support plate is fixedly connected to the second triangular plate near the right-angle vertex, one side support rod is fixedly connected to the inner side of the second side plate, and the other side support rod is fixedly connected to the side support plate, the inner rings of the two second bearings are correspondingly mounted on the two side support rods, and the two sides of the second rotating tube are respectively mounted on the outer rings of the two second bearings.

[0017] The baffle rod of the buffer guide provided by the utility model will rotate around the rotating shaft after being affected by the impact of the front end of the drill rod. At the same time, the rotating shaft or the baffle rod will drive the counterweight block in the counterweight assembly to rise. When the front end of the drill rod continues to slide on the smooth path until it is separated from the baffle rod, the counterweight block will fall again and drive the rotating shaft and the baffle rod to rotate until the baffle rod connected to the side of the rotating shaft is reset. This design can buffer and guide the downward movement of the drill rod, and since no elastic reset member is used, the weight of the counterweight block will not change during use, and the problem of the elastic reset member being unable to be reliably reset after plastic deformation after a period of use will not occur, thereby reliably buffering and guiding the drilling tool.

[0018] The automatic roller mechanism for drilling tool throwing provided by the present invention includes the aforementioned buffer guide member and has the advantages of the aforementioned buffer guide member, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of a buffer guide provided in a specific embodiment of the present utility model connected to a smooth path;

[0021] Figure 2 This is an enlarged structural diagram of the connection position between the wire rope and the pulley provided in a specific embodiment of the present utility model;

[0022] Figure 3 This is an enlarged structural diagram of the connection position between the steel wire rope and the counterweight block provided in a specific embodiment of the present utility model;

[0023] Figure 4 This is a second structural diagram of a buffer guide provided by a specific embodiment of the present invention connected to a smooth path;

[0024] Figure 5 This is a structural diagram of an automatic rolling bar mechanism for throwing drill tools provided in a specific embodiment of the present utility model;

[0025] Figure 6 This is an enlarged structural schematic diagram of a first guide member provided in a specific embodiment of the present utility model;

[0026] Figure 7 This is an enlarged structural schematic diagram of a second guide member provided in a specific embodiment of the present utility model.

[0027] The following are marked in the accompanying drawings:

[0028] 1. Smooth track; 11. Support seat; 12. Groove; 13. Bottom support rod; 14. Rotating sleeve;

[0029] 2. First guide member; 21. First triangular plate; 211. First side plate; 22. First bolt;

[0030] 3. Buffer guide; 31. Rotating shaft; 311. Second bevel gear; 32. Stop rod; 321. Inner support rod; 33. Bushing; 34. First bearing; 35. First rotating tube; 36. Wire rope; 361. Rope ring; 37. Counterweight; 371. Hook; 38. Pulley; 381. Clamping plate; 382. Pulley shaft; 383. Limiting ring; 39. Winding shaft; 391. First bevel gear;

[0031] 4. Second guide member; 41. Second triangular plate; 411. Second side plate; 42. Second bolt; 43. Side support rod; 44. Second bearing; 45. Second rotating tube; 46. Side support plate;

[0032] 5. The third guide member;

[0033] 6. Inclined slide;

[0034] 7. Drill rod rack. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0036] Please refer to Figures 1 to 7 , Figure 1 This is one of the structural schematic diagrams of a buffer guide provided by a specific embodiment of the present invention connected to a smooth path, wherein the structure of the buffer guide is a partial cross-sectional structure; Figure 2 This is an enlarged structural diagram of the connection position between the wire rope and the pulley provided in a specific embodiment of the present utility model; Figure 3 This is an enlarged structural diagram of the connection position between the steel wire rope and the counterweight block provided in a specific embodiment of the present utility model; Figure 4 This is a second structural diagram of a buffer guide provided by a specific embodiment of the present invention connected to a smooth path; Figure 5 This is a structural diagram of an automatic rolling bar mechanism for throwing drill tools provided in a specific embodiment of the present utility model; Figure 6 This is an enlarged structural schematic diagram of a first guide member provided in a specific embodiment of the present utility model; Figure 7 This is an enlarged structural schematic diagram of a second guide member provided in a specific embodiment of the present invention, wherein the second rotating tube is shown as a cross-sectional structure.

[0037] The embodiment of the present utility model first provides a buffer guide 3, including a rotating shaft 31, a baffle 32 and a counterweight assembly, one end of the baffle 32 is fixedly connected to the rotating shaft 31, the rotating shaft 31 is rotatably connected in the shaft sleeve 33, the shaft sleeve 33 is fixedly connected to the smooth path 1, and the bottom of the smooth path 1 is symmetrically fixedly connected with a support seat 11. The baffle 32 or the rotating shaft 31 is connected to the counterweight assembly. When the baffle 32 is stationary, it is perpendicular to the front and back direction of the smooth path 1. When the baffle 32 rotates under the push of the drill rod, the counterweight block 37 of the counterweight assembly rises. When the drill rod is separated from the baffle 32, the counterweight block 37 of the counterweight assembly automatically descends and drives the baffle 32 to reset. The shaft sleeve 33 can be set as a limiting shaft sleeve, or it can be set as a shaft sleeve without a limiting function, and other limiting structures are set on the side of the baffle 32 to limit the rotation angle of the baffle 32.

[0038] The baffle 32 of the buffer guide member 3 provided in the embodiment of the present invention will rotate around the rotating shaft 31 after being impacted by the lower end of the drill rod. At the same time, the rotating shaft 31 or the baffle 32 will drive the counterweight block 37 in the counterweight assembly to rise. When the lower end of the drill rod continues to slide on the smooth path until it is separated from the baffle 32, the counterweight block 37 will fall again and drive the rotating shaft 31 and the baffle 32 to rotate until the baffle 32 fixedly connected to the side of the rotating shaft 31 is reset. This design can buffer and guide the downward movement of the drill rod, and since no elastic reset member is used, the weight of the counterweight block 37 will not change during use, and there will be no problem that the elastic reset member cannot be reliably reset after plastic deformation after a period of use, thereby reliably buffering and guiding the drill rod.

[0039] like Figure 1-Figure 3 In one embodiment, the counterweight assembly further includes a wire rope 36, one end of which is connected to the outer surface of the barrier rod 32, and the other end is connected to the counterweight 37. When the barrier rod 32 rotates, the wire rope 36 extends in one direction, thereby raising the counterweight 37 to a certain height.

[0040] In addition to the above embodiment, the counterweight assembly further includes a pulley 38. The wire rope 36 near the barrier rod 32 passes over the pulley 38 and then passes through the slot 12 on the smooth path 1 to connect with the counterweight 37 at the bottom of the smooth path 1. The pulley 38 can guide the wire rope 36, making it easier to convert the horizontal position movement of the wire rope 36 at the connection between the barrier rod 32 and the counterweight 37 into the vertical position movement of the counterweight 37 without getting stuck.

[0041] Specifically, a rope ring 361 is formed at one end of the steel wire rope 36 away from the barrier rod 32 , and a hook 371 is fixedly connected to the top of the counterweight 37 , and the counterweight 37 is hooked on the rope ring 361 through the hook 371 .

[0042] The pulley 38 includes a splint 381, which is symmetrically fixedly connected to the smooth path 1 (which can be the top of a set of first triangular plates 21 described later). The middle part of the splint 381 is rotatably connected to the pulley shaft 382, ​​and the middle part of the pulley shaft 382 is fixedly connected to the limiting ring 383, which matches the wire rope 36.

[0043] like Figure 4As shown, in another specific embodiment, the counterweight assembly includes a bottom support rod 13 fixedly connected to the bottom of the smooth path 1, and the bottom of the bottom support rod 13 is fixedly connected to a rotating sleeve 14, and a winding shaft 39 is rotatably connected inside the rotating sleeve 14. A steel wire rope 36 is wound around the winding shaft 39, and one end of the steel wire rope 36 is fixedly connected to the winding shaft 39, and the other end is connected to the counterweight block 37. The end of the winding shaft 39 is connected to a first bevel gear 391, and the first bevel gear 391 is meshed with a second bevel gear 311 at the lower end of the rotating shaft 31 passing through the smooth path 1. After the drill rod acts on the baffle rod 32 to drive the rotating shaft 31 to rotate, the second bevel gear 311 synchronously drives the first bevel gear 391 and the winding shaft 39 to rotate, and more wire rope 36 is wound on the winding shaft 39. The wire rope 36 drives the counterweight 37 to rise. When the baffle rod 32 connected to the rotating shaft 31 is no longer affected by the drill rod, the winding shaft 39 is reversed under the action of the gravity of the counterweight 37, and at the same time, the rotating shaft 31 is driven to reverse and reset through the cooperation of the first bevel gear 391 and the second bevel gear 311.

[0044] In a specific embodiment, preferably, an inner support rod 321 is provided inside the middle part of the blocking rod 32, and a first rotating tube 35 is rotatably connected to the outer side of the inner support rod 321 through two first bearings 34. The first rotating tube 35 can be rotated to facilitate the movement of the drill rod on the first rotating tube 35.

[0045] The Chinese utility model patent with announcement number CN219101266U - a non-powered catwalk drill bit device - does not impose a rigid limit on the rotation angle of the center rod, that is, there is no centrally located guide design on the guide plate. When the impact force of the drill rod is too large, the drill rod pushes the center rod to rotate at a large angle, which causes the drill tool to still deviate to both sides after passing through the upper guide mechanism during the descent process, thereby creating the risk of the drill tool detaching from the guide plate.

[0046] In view of this, if Figure 1-Figure 7The embodiment of the present invention also provides an automatic roller mechanism for drilling tools, comprising an inclined slide 6 and a smooth path 1 for sequentially guiding the drilling tools. The front portion of the smooth path 1 is connected to the lower portion of the inclined slide 6. The smooth path 1 is provided with a first guide device and a second guide device spaced apart from each other in front and back to guide the drill rods in sequence. The first guide device comprises the aforementioned buffer guide 3 and two sets of first guides 2 symmetrically fixedly connected to the smooth path 1. The first guide 2 has an inclined guide surface extending from the side of the smooth path 1 to the middle of the smooth path 1 to guide the drill rod in the center. An opening (i.e., a slide groove) for the drill rod to pass through is provided between the projections of the two sets of first guides 2 in the front-to-back direction. The blocking rod 32 of the buffer guide 3 is located at the rear of the first guide 2 and blocks the opening. Of course, the length of the blocking rod 32 of the buffer guide 3 can also be much larger than the opening. Preferably, the length of the blocking rod 32 is adapted to the width of the smooth path 1 to facilitate guiding the drill rod to move to the drill rod rack 7. The rotatable angle of the buffer guide member 3 can be set to be relatively large, so that the buffer guide member 3 mainly plays a buffering role.

[0047] In this embodiment, the inclined guide surfaces of the two groups of first guide members 2 can adjust the position of the drill rod sliding down the inclined slide 6, so that the lower end of the drill rod continues to slide from the middle of the two groups of first guide members 2 and contacts the blocking rod 32 of the buffer guide member 3, and the buffer guide member 3 can buffer the downward movement of the drill rod.

[0048] like Figure 6 As shown, in a specific embodiment, the first guide member 2 includes a first triangular plate 21, a first side plate 211, and a first bolt 22. The first triangular plate 21 is threadedly connected to the upper surface of the smooth path 1 via the first bolt 22. The first side plate 211 is fixedly connected to the hypotenuse of the first triangular plate 21. The inner side surface of the first side plate 211 forms an inclined guide surface. The first guide member 2 in this embodiment is easy to manufacture and install, has high strength, and can reliably guide the drill rod.

[0049] In this embodiment, the overall height of the drill rod is already low when the lower end of the drill rod passes through the lower guide mechanism. After being guided by the second guide device, the drill rod continues to slide down and is not easy to move to the upper surface of one side of the lower guide mechanism, so it is not easy to be pulled to the drill rod rack 7 on one side of the smooth path 1 by workers.

[0050] In this regard, in a specific embodiment of the present invention, the second guide device includes a second guide member 4 and a third guide member 5. The second guide member 4 and the third guide member 5 both have inclined guide surfaces extending from the side of the smooth path 1 to the middle of the smooth path 1. The rear end of the third guide member 5 is positioned further back than the rear end of the second guide member 4, and the projections of the third guide member 5 and the second guide member 4 in the front-to-back direction intersect. In this way, when the lower end of the drill rod continues to slide downward from between the second guide member 4 and the third guide member 5, the guidance of the third guide member 5 can more easily guide the raised drill rod body to the upper part of the second guide member 4. At this time, the lower end of the drill rod falls on the second guide member 4 and the upper end of the drill rod falls on the first rotating tube 35 on the blocking rod 32, thereby making it easier for the operator to pull the drill rod to the drill rod rack 7 on the side of the smooth path 1.

[0051] On the basis of the above embodiment, the inclined guiding surface of the third guide member 5 extends toward the middle of the smooth path 1 beyond the center line of the smooth path 1 , thereby facilitating the guidance of the drill rod toward the second guide member 4 .

[0052] like Figure 7 As shown, based on the above embodiment, the third guide member 5 is a guide rod, and the second guide member 4 includes a second triangular plate 41, a second side plate 411, a second bolt 42, a side support plate 46, two side support rods 43, two second bearings 44, and a second rotating tube 45. The second triangular plate 41 is threadedly connected to the upper surface of the smooth path 1 via the second bolt 42. The second side plate 411 is fixedly attached to the hypotenuse of the second triangular plate 41, and the inner surface of the second side plate 411 forms an inclined guide surface. The side support plate 46 is fixedly attached to the second triangular plate 41 near the right-angled vertex. One side support rod 43 is fixedly attached to the outer side of the second side plate 411, and the other side support rod 43 is fixedly attached to the outer side of the side support plate 46. The inner races of the two second bearings 44 are respectively mounted on the two side support rods 43. The second rotating tube 45 is mounted on the outer races of the two second bearings 44. This allows the drill pipe to contact the second rotating tube 45 when the lower end is flat on the second guide member 4, facilitating its movement.

[0053] The working principle and use process of the automatic rolling bar mechanism for the mid-swing drilling tool of the utility model are as follows:

[0054] As the drill rod slides down the inclined slide 6 onto the smooth track 1, the first side plate 211 on the hypotenuse of the first triangular plate 21 can adjust the position of the drill rod sliding down the inclined slide 6, thereby allowing the lower end of the drill rod to continue sliding between the two sets of first triangular plates 21 and contact the first rotating tube 35. At this time, the first rotating tube 35 rotates around the rotating shaft 31 along with the stopper 32 under the impact of the drill rod. This design can cushion the downward movement of the drill rod. At the same time, when the rotating shaft 31 and the stopper 32 rotate, the wire rope 36 pulling the counterweight 37 will move upward. At this time, the counterweight 37 pulled by the wire rope 36 will be lifted synchronously. When the lower end of the drill rod continues to slide on the smooth track 1 until it is separated from the first rotating tube 35, the counterweight 37 will fall again and rotate the rotating shaft 31 through the wire rope 36 until the stopper 32 and the first rotating tube 35 connected to the side of the rotating shaft 31 are completely reset. A second guide member 4 and a third guide member 5 are provided at the rear of the smooth path 1. When the lower end of the drill rod detaches from the first guide device and continues to slide on the top of the smooth path 1, the drill rod can be limited by the second guide member 4 and the third guide member 5 until the lower end of the drill rod continues to slide from the middle of the third guide member 5 (guide rod) and the second side plate 411 of the second guide member 4. The lifted drill rod body can be guided to the second rotating tube 45 by the third guide member 5 (guide rod). At this time, the lower end of the drill rod falls on the second rotating tube 45 and the upper end of the drill rod falls on the first rotating tube 35. At this time, the drill rod lies flat on the second rotating tube 45 and the first rotating tube 35 and waits for the operator to further pull it to the drill rod rack 7 on the side of the smooth path 1.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above is a detailed introduction to the automatic roller mechanism for drilling tools provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A buffer guide member (3), characterized in that: The utility model comprises a rotating shaft (31), a blocking rod (32) and a counterweight assembly, wherein one end of the blocking rod (32) is fixedly connected to the rotating shaft (31), the rotating shaft (31) is rotatably connected in a shaft sleeve (33), the shaft sleeve (33) is fixedly connected to the smooth path (1), the blocking rod (32) or the rotating shaft (31) is connected to the counterweight assembly, and the blocking rod (32) is perpendicular to the front-back direction of the smooth path (1) when stationary. When the blocking rod (32) rotates under the push of the drill rod, the counterweight block (37) of the counterweight assembly rises. When the drill rod is separated from the blocking rod (32), the counterweight block (37) automatically descends and drives the blocking rod (32) to reset.

2. The buffer guide (3) according to claim 1, characterized in that: The counterweight assembly further comprises a steel wire rope (36), one end of which is connected to the outer surface of the blocking rod (32), and the other end of which is connected to the counterweight block (37).

3. The buffer guide (3) according to claim 2, characterized in that: The counterweight assembly further comprises a pulley (38), and a steel wire rope (36) near the blocking rod (32) passes around the pulley (38) and then through the through groove (12) on the smooth path (1) to be connected to the counterweight block (37) located at the bottom of the smooth path (1).

4. The buffer guide (3) according to claim 1, characterized in that: The counterweight assembly comprises a bottom support rod (13) fixedly connected to the bottom of the smooth path (1); the bottom of the bottom support rod (13) is fixedly connected to a rotating sleeve (14); a winding shaft (39) is rotatably connected inside the rotating sleeve (14); a steel wire rope is wound around the winding shaft (39); one end of the steel wire rope (36) is fixedly connected to the winding shaft (39); the other end is connected to the counterweight block (37); the end of the winding shaft (39) is connected to a first bevel gear (391); the first bevel gear (391) is meshed with a second bevel gear (311) at the lower end of the rotating shaft (31) passing through the smooth path (1).

5. The buffer guide (3) according to claim 1, characterized in that: The outer side of the middle portion of the blocking rod (32) is rotatably sleeved with a first rotating tube (35) via two first bearings (34).

6. An automatic rolling bar mechanism for throwing drill tools, comprising an inclined slideway (6) and a smooth path (1) for sequentially guiding drill rods, wherein the rear portion of the smooth path (1) is connected to the lower portion of the inclined slideway (6), and a first guide device and a second guide device for sequentially guiding the drill rods are provided on the smooth path (1) at intervals in front and back, characterized in that: The first guiding device comprises a buffering guide member (3) as described in any one of claims 1 to 5 and two groups of first guiding members (2) symmetrically fixedly connected to the smooth path (1), the first guiding member (2) having an inclined guiding surface extending from the side of the smooth path (1) to the middle of the smooth path (1) to guide the drill rod in the center, an opening for the drill rod to pass through is provided between the projections of the two groups of the first guiding members (2) in the front and rear directions, and the blocking rod (32) of the buffering guide member (3) is located at the rear of the first guide member (2) and blocks the opening.

7. The automatic rolling bar mechanism for drilling tool throwing according to claim 6, characterized in that: The first guide member (2) comprises a first triangular plate (21), a first side plate (211) and a first bolt (22); the first triangular plate (21) is threadedly connected to the upper surface of the smooth path (1) via the first bolt (22); the first side plate (211) is fixedly connected to the oblique side of the first triangular plate (21); and the inner side surface of the first side plate (211) forms the inclined guide surface.

8. The automatic rolling bar mechanism for drilling tool throwing according to claim 6, characterized in that: The second guide device comprises a second guide member (4) and a third guide member (5), wherein the second guide member (4) and the third guide member (5) both have an inclined guide surface extending from the side of the smooth path (1) to the middle of the smooth path (1), the rear end of the third guide member (5) is positioned further back than the rear end of the second guide member (4), and the projections of the third guide member (5) and the second guide member (4) in the front-rear direction intersect.

9. The automatic rolling bar mechanism for drilling tool throwing according to claim 8, characterized in that: The inclined guide surface of the third guide member (5) extends toward the middle of the smooth path (1) and beyond the center line of the smooth path (1).

10. The automatic rolling bar mechanism for drilling tool throwing according to claim 8, characterized in that: The third guide member (5) is a guide rod, and the second guide member (4) includes a second triangular plate (41), a second side plate (411), a second bolt (42), a side support plate (46), two side support rods (43), two second bearings (44) and a second rotating tube (45); the second triangular plate (41) is threadedly connected to the upper surface of the smooth path (1) through the second bolt (42), the second side plate (411) is fixedly connected to the hypotenuse side of the second triangular plate (41), and the second side plate (4 11) forms the inclined guide surface; the side support plate (46) is fixedly connected to the second triangular plate (41) near the right-angle vertex, one side support rod (43) is fixedly connected to the second side plate (411), and the other side support rod (43) is fixedly connected to the side support plate (46), the inner rings of the two second bearings (44) are correspondingly sleeved on the two side support rods (43), and the two sides of the second rotating tube (45) are respectively sleeved on the outer rings of the two second bearings (44).

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