Automatic unhooking device for drill rod

Abstract

The present invention relates to an automatic unhooking device for a drill rod, belonging to the technical field of drill rod replacement devices, and comprises a mounting seat, a rotating arm, a supporting hook, a limiting mechanism and a resetting mechanism; the mounting seat is fixed to the bottom of a mobile frame, the mounting seat is rotatably connected to one end of the rotating arm, the other end of the rotating arm is correspondingly overlapped on the limiting mechanism, the limiting mechanism is arranged on the mobile frame, the supporting hook is rotatably connected to the mounting seat and is located below the rotating arm, the supporting hook is an eccentric structure that can be deflected toward one side of the overlapping end of the rotating arm, the supporting hook has a drill rod support surface and a limiting surface, wherein the limiting surface cooperates with a supporting hook stopper on the rotating arm; the resetting mechanism is arranged on the rotating arm so that the overlapping end of the rotating arm that has been separated from the limiting mechanism continues to overlap on the rotating arm. The present invention realizes automatic unhooking and hooking of the drill rod by arranging a rotatable supporting hook.

Description

Technical Field

[0001] The invention belongs to the technical field of drill rod replacement devices and relates to an automatic unhooking device for a drill rod. Background Art

[0002] The iron mouth opening machine is a key equipment in front of the blast furnace ironmaking furnace. The drill rod used for opening the iron mouth is installed on the iron mouth opening machine. However, due to the long length of the drill rod, the middle part is easy to bend obliquely downward due to gravity. Therefore, a support hook is provided in the middle position between the drill rod joint and the drill rod head of the iron mouth opening machine to support the drill rod. On the one hand, it can prevent the drill rod from bending downward, and on the other hand, it can prevent excessive swinging due to centrifugal force when rotating during the opening operation. However, the above-mentioned support hook is directly welded to the mobile frame.

[0003] At present, most steel companies use manual operation to replace drill rods. Since the support hook is fixed, the drill rod can be placed on the support hook smoothly during replacement, but it is time-consuming and laborious. As my country's industry continues to advance from traditional to intelligent manufacturing, some steel companies have put forward the demand for automatic replacement of drill rods to replace manual operation. The original fixed support hook is difficult to achieve automatic unhooking and hooking of the drill rod. Therefore, it is necessary to develop an automatic unhooking device for the drill rod to solve the problem that the drill rod cannot be automatically unhooked. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a drill rod automatic unhooking device, which realizes automatic unhooking and hooking of the drill rod.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A drill rod automatic unhooking device comprises a mounting seat, a rotating arm, a supporting hook, a limiting mechanism and a resetting mechanism; the mounting seat is fixed to the bottom of a mobile frame, the mounting seat is rotatably connected to one end of the rotating arm, the other end of the rotating arm is correspondingly overlapped on the limiting mechanism, the limiting mechanism is arranged on the mobile frame, the supporting hook is rotatably connected to the mounting seat and is located below the rotating arm, the supporting hook is an eccentric structure that can be deflected toward one side of the overlapping end of the rotating arm, the supporting hook is provided with a drill rod supporting surface and a limiting surface, wherein the limiting surface cooperates with a supporting hook stopper on the rotating arm; the resetting mechanism is arranged on the rotating arm to enable the overlapping end of the rotating arm that has been separated from the limiting mechanism to continue to overlap on the rotating arm.

[0007] Optionally, the reset mechanism includes an elastic member, which is arranged on a side of the rotating arm close to the movable frame, has one end located in a limiting groove arranged on the rotating arm, and the other end connected to the limiting mechanism.

[0008] Optionally, the limiting mechanism includes a support seat, an end of the support seat away from the moving frame is provided with an overlapping surface corresponding to the overlapping position of the rotating arm, and an end of the support seat close to the moving frame is provided with a guide column extending toward the overlapping surface, and the elastic member is sleeved on the guide column.

[0009] Optionally, the reset mechanism comprises a tension spring, one end of which is connected to the rotating arm and is located between the rotating fulcrum and the overlap surface of the rotating arm, and the other end of which is connected to a mounting seat on a side of the rotating arm away from the movable frame.

[0010] Optionally, the reset mechanism includes a torsion spring, a first rotating shaft is provided at the rotating fulcrum of the rotating arm, the torsion spring is sleeved on the first rotating shaft, one end of the torsion spring is connected to the rotating arm and is located between the rotating fulcrum and the lap surface of the rotating arm, and the other end is connected to the mounting seat on the side of the rotating arm close to the movable frame.

[0011] Optionally, the center of gravity of the support hook is located below the rotation fulcrum of the support hook and close to one side of the overlapping end of the rotating arm.

[0012] Optionally, the support hook has a limiting arm and a load-bearing arm, and the two form a V-shaped structure. The limiting surface and the drill rod supporting surface are respectively arranged on the limiting arm and the load-bearing arm, and are located on the inner side of the V-shaped structure. A guide surface is provided on the side of the load-bearing arm away from the drill rod supporting surface. When the support hook is in a free state, the angle α between the guide surface and the vertical direction is greater than 0°.

[0013] Optionally, a first rounded portion is provided on a side of the end of the limiting arm away from the load-bearing arm.

[0014] Optionally, a second chamfer is provided on a side of the end of the hook stopper away from the limiting surface.

[0015] Optionally, a drill rod stopper is provided on the support hook.

[0016] The beneficial effect of the present invention is that by arranging a rotatable support hook, the drill rod can be automatically hooked or unhooked, which effectively solves the problem that the drill rod cannot be automatically replaced because the original fixed support hook of the tapping machine cannot automatically unhook or hook the drill rod.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 It is a structural schematic diagram of a drill rod automatic unhooking device embodiment 1 of the present invention;

[0020] Figure 2 The present invention is a schematic diagram of the unhooking process of the automatic unhooking device for the drill rod in Example 1. Figure 1 ;

[0021] Figure 3 The present invention is a schematic diagram of the unhooking process of the automatic unhooking device for the drill rod in Example 1. Figure 2 ;

[0022] Figure 4 The hooking process of the automatic unhooking device for a drill rod according to the present invention is shown in FIG. Figure 1 ;

[0023] Figure 5 The hooking process of the automatic unhooking device for a drill rod according to the present invention is shown in FIG. Figure 2 ;

[0024] Figure 6 It is a structural schematic diagram of a second embodiment of a drill rod automatic unhooking device of the present invention;

[0025] Figure 7 It is a structural schematic diagram of Example 3 of an automatic unhooking device for a drill rod according to the present invention.

[0026] Figure numerals: mobile frame 1, base plate 2, mounting seat 3, rotating arm 4, first fulcrum 5, first chamfer 6, support hook block 7, limiting surface 8, support hook 9, second fulcrum 10, center of gravity 11, support seat 12, guide column 13, elastic member 14, limiting groove 15, boss 16, second chamfer 17, drill rod 18, drill rod block 19, drill rod supporting surface 20, guide surface 21, first connecting column 22, tension spring 23, second connecting column 24, third connecting column 25, torsion spring 26, fourth connecting column 27. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] See also Figure 1 to Figure 7 , a drill rod automatic unhooking device, comprising a mounting seat 3, a rotating arm 4, a hook 9, a limiting mechanism and a reset mechanism; the mounting seat 3 is fixed to the bottom of the mobile frame 1, the mounting seat 3 is rotatably connected to one end of the rotating arm 4, and the other end of the rotating arm 4 is correspondingly overlapped on the limiting mechanism, the limiting mechanism is arranged on the mobile frame 1, the hook 9 is rotatably connected to the mounting seat 3 and is located below the rotating arm 4, the hook 9 is an eccentric structure that can be deflected toward one side of the overlapping end of the rotating arm 4, the center of gravity 11 of the hook 9 is located below the rotation fulcrum of the hook 9 and close to one side of the overlapping end of the rotating arm; the hook 9 is provided with a drill rod supporting surface 20 and a limiting surface 8, wherein the limiting surface 8 cooperates with the hook stopper 7 on the rotating arm 4; the reset mechanism is arranged on the rotating arm 4 so that the overlapping end of the rotating arm 4 that has been separated from the limiting mechanism continues to be overlapped on the rotating arm 4.

[0031] The support hook 9 has a limiting arm and a load-bearing arm, and the two form a V-shaped structure. The limiting surface 8 and the drill rod supporting surface 20 are respectively arranged on the limiting arm and the load-bearing arm, and are located on the inner side of the V-shaped structure. A guide surface 21 is provided on the side of the load-bearing arm away from the drill rod supporting surface 20. When the support hook 9 is in a free state, the angle α between the guide surface 21 and the vertical direction is greater than 0°; a first chamfer 6 is provided on the side of the end of the limiting arm away from the load-bearing arm; a second chamfer 17 is provided on the side of the end of the support hook stopper 7 away from the limiting surface 8; the supporting surface of the load-bearing arm is arc-shaped, and a drill rod stopper 19 is provided on the end of the load-bearing arm to prevent the drill rod 18 from slipping out during operation. The drill rod stopper 19 can be a split design or an integrated design with the load-bearing arm.

[0032] The resetting of the reset mechanism can be achieved through the elastic member 14: the reset mechanism includes an elastic member 14, which is arranged on the side of the rotating arm 4 close to the moving frame 1, one end of the elastic member 14 is located in a limiting groove 15 arranged on the rotating arm 4, and the other end is connected to the limiting mechanism; the limiting mechanism includes a support seat 12, and the end of the support seat 12 away from the moving frame 1 is provided with a lap joint surface corresponding to the lap joint position of the rotating arm, and the lap joint surface is a boss 16, and the end of the support seat 12 close to the moving frame 1 is provided with a guide column 13 extending toward the lap joint surface, and the elastic member 14 is a compression spring or an elastic sleeve, and the elastic member 14 is sleeved on the guide column 13.

[0033] The resetting of the resetting mechanism can be achieved by a tension spring 23: the resetting mechanism includes a tension spring 23, one end of which is connected to the rotating arm 4 and is located between the rotating fulcrum and the overlapping surface of the rotating arm 4, and the other end is connected to the mounting seat 3 on the side of the rotating arm 4 away from the moving frame 1.

[0034] The resetting of the resetting mechanism can be achieved by a torsion spring 26: the resetting mechanism includes a torsion spring 26, a first rotating shaft is provided at the rotating fulcrum of the rotating arm 4, the torsion spring 26 is sleeved on the first rotating shaft, one end of the torsion spring 26 is connected to the rotating arm 4 and is located between the rotating fulcrum and the lap surface of the rotating arm 4, and the other end is connected to the mounting seat 3 on the side of the rotating arm 4 close to the moving frame 1.

[0035] Example 1

[0036] See also Figure 1 A drill rod automatic unhooking device comprises a mounting base 3, a supporting base 12, a rotating arm 4, a supporting hook 9 and a reset mechanism. The mounting base 3 and the supporting base 12 are respectively fixed on the left and right sides of a bottom plate 2 located at the bottom of a moving frame 1.

[0037] A second fulcrum 10 is provided at the bottom of the mounting seat 3, and a support hook 9 is rotatably connected through the second fulcrum 10. The support hook 9 is an eccentric structure, and its center of gravity is located at the lower right of the second fulcrum 10. A first rounded surface 6 is processed on one side of the upper side of the support hook 9, and a limited position surface 8 is processed on the other side of the upper side. A drill rod support surface 20 and a drill rod stopper 19 are provided on one side of the support hook 9. The drill rod support surface 20 is arc-shaped and is used to support the drill rod 18. The drill rod stopper 19 prevents the drill rod 18 from sliding out during operation. A guide surface 21 is processed on one side of the support hook 9 and is located below the drill rod support surface 20.

[0038] A first fulcrum 5 is provided on the upper part of the mounting seat 3, and a rotating arm 4 is rotatably connected through the first fulcrum 5. A hook stopper 7 is processed at the lower middle part of the rotating arm 4. An upper limiting surface 8 of the hook 9 acts on the side of the hook stopper 7. A second chamfer 17 is processed on one side of the lower part of the hook stopper 7, and a limiting groove 15 is processed at the tail of the rotating arm 4.

[0039] A support seat 12 is welded on the other side of the bottom plate 2, a guide column 13 is processed on the upper part of the support seat 12, and a boss 16 is processed on the lower part;

[0040] An elastic member 14 is installed between the rotating arm 4 and the support seat 12. The upper part of the elastic member 14 is installed on the guide column 13, and the lower part of the elastic member 14 is installed on the limiting groove 15. Under the action of the elastic member 14, one end of the rotating arm 4 acts on the boss 16 of the support seat 12.

[0041] The working principle of this embodiment is as follows:

[0042] Under normal working conditions, under the action of the elastic member 14, the lower tail of the rotating arm 4 acts on the boss 16 of the support seat 12, and the limiting surface 8 on the upper part of the support hook 9 acts on the support hook stopper 7 in the middle part of the rotating arm 4. The support hook 9 cannot rotate, and the drill rod 18 is supported by the drill rod support surface 20.

[0043] See also Figure 2 and Figure 3 When it is necessary to remove the drill rod 18, the drill changing device clamps the drill rod 18 and moves upward. After the drill rod 18 presses against the bottom of the rotating arm 4, it continues to move upward. The rotating arm 4 overcomes the elastic force of the elastic member 14 and rotates counterclockwise around the first fulcrum 5. The middle hook stopper 7 of the rotating arm 4 also moves upward until the limiting surface 8 on the upper part of the hook 9 is completely separated from the hook stopper 7. The hook 9 rotates clockwise around the second fulcrum 10 due to the eccentric structure and is separated from the action of the hook stopper 7. Then the drill rod 18 moves downward, and the rotating arm 4 returns to its original position under the action of the elastic member 14. The drill rod 18 continues to move downward until it is completely separated from the drill rod support surface 20 of the hook 9. Then the hook 9 returns to its natural state (the center of gravity of the hook 9 is located directly below the second fulcrum 10), and the automatic unhooking process ends.

[0044] See also Figure 4 and Figure 5 When the drill rod 18 needs to be installed, the drill changing device clamps the drill rod 18 and moves upward from the bottom of the hook 9. After the drill rod 18 presses against the guide surface 21 of the hook 9, it continues to move upward, and the hook 9 rotates counterclockwise around the second fulcrum 10. The first chamfer 6 on the upper part of the hook 9 contacts and acts on the second chamfer 17 on the hook stopper 7 of the rotating arm 4. Then the rotating arm 4 overcomes the elastic force of the elastic member 14 and rotates counterclockwise around the first fulcrum 5 until the upper part of the hook 9 passes over the hook stopper 7 of the rotating arm 4. After that, the rotating arm 4 returns to its original position under the action of the elastic member 14, and the drill rod 18 continues to move upward, and the support hook 9 continues to rotate counterclockwise around the second fulcrum 10 until the drill rod 18 passes over the drill rod stopper 19 at the end of the support hook 9. At this time, the support hook 9 immediately rotates clockwise around the second fulcrum 10 due to its eccentric structure to reset until the limit surface 8 is blocked by the support hook stopper 7 of the rotating arm 4, and then the drill rod 18 starts to move downward until it acts on the drill rod support surface 20 of the support hook 9, and the automatic hooking process ends.

[0045] Example 2

[0046] See also Figure 6Different from Example 1, a first connecting column 22 is welded on the rotating arm 4, a second connecting column 24 is welded on the mounting seat 3, a tension spring 23 is arranged between the first connecting column 22 and the second connecting column 24, one end of the tension spring 23 is installed on the first connecting column 22, and the other end is installed on the second connecting column 24.

[0047] The working principle of this embodiment is as follows:

[0048] What is different from the first embodiment is that the resetting of the rotating arm 4 in the first embodiment depends on the action of the elastic member 14 , while the resetting of the rotating arm 4 in the present embodiment depends on the action of the tension spring 23 .

[0049] Embodiment 3:

[0050] See also Figure 7 Different from Example 1, a third connecting column 25 is welded on the mounting seat 3, a fourth connecting column 27 is welded on the rotating arm 4, a torsion spring 26 is sleeved on the first fulcrum 5, one end of the torsion spring 26 is mounted on the third connecting column 25, and the other end is mounted on the fourth connecting column 27.

[0051] The working principle of this embodiment is as follows:

[0052] What is different from the first embodiment is that the resetting of the rotating arm 4 in the first embodiment depends on the action of the elastic member 14 , while the resetting of the rotating arm 4 in the present embodiment depends on the action of the torsion spring 26 .

[0053] The present invention can be used in the field of automatic replacement of drill rods in a blast furnace ironmaking taphole opening machine. By providing a rotatable support hook 9, the drill rod 18 can be automatically hooked or unhooked, which effectively solves the problem that the taphole opening machine cannot automatically unhook or hook the drill rod due to the original fixed support hook, which ultimately leads to the inability to automatically replace the drill rod.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A drill rod automatic unhooking device, characterized in that: It includes a mounting seat, a rotating arm, a support hook, a limiting mechanism and a reset mechanism; the mounting seat is fixed to the bottom of the mobile frame, the mounting seat is rotatably connected to one end of the rotating arm, the other end of the rotating arm is correspondingly overlapped on the limiting mechanism, the limiting mechanism is arranged on the mobile frame, the support hook is rotatably connected to the mounting seat and is located below the rotating arm, the support hook is an eccentric structure that can be deflected toward one side of the overlapping end of the rotating arm, the support hook is provided with a drill rod supporting surface and a limiting surface, wherein the limiting surface cooperates with the support hook stopper on the rotating arm; the reset mechanism is arranged on the rotating arm to reset and overlap on the limiting mechanism after the overlapping end of the rotating arm is separated from the limiting mechanism; the center of gravity of the support hook is located below the rotating fulcrum of the support hook and close to one side of the overlapping end of the rotating arm.

2. The automatic unhooking device for a drill rod according to claim 1, characterized in that: The reset mechanism comprises an elastic member, which is arranged on a side of the rotating arm close to the moving frame, one end of which is located in a limiting groove arranged on the rotating arm, and the other end of which is connected to the limiting mechanism.

3. The automatic unhooking device for a drill rod according to claim 2, characterized in that: The limiting mechanism comprises a support seat, an end of the support seat away from the moving frame is provided with an overlapping surface corresponding to the overlapping position of the rotating arm, and an end of the support seat close to the moving frame is provided with a guide column extending toward the overlapping surface, and the elastic member is sleeved on the guide column.

4. The automatic unhooking device for a drill rod according to claim 1, characterized in that: The reset mechanism comprises a tension spring, one end of which is connected to the rotating arm and is located between the rotating fulcrum and the overlap surface of the rotating arm, and the other end of which is connected to a mounting seat on a side of the rotating arm away from the moving frame.

5. The automatic unhooking device for a drill rod according to claim 1, characterized in that: The reset mechanism includes a torsion spring, a first rotating shaft is provided at the rotating fulcrum of the rotating arm, the torsion spring is sleeved on the first rotating shaft, one end of the torsion spring is connected to the rotating arm and is located between the rotating fulcrum and the overlapping surface of the rotating arm, and the other end is connected to the mounting seat on the side of the rotating arm close to the moving frame.

6. The automatic unhooking device for a drill rod according to claim 1, characterized in that: The support hook has a limiting arm and a load-bearing arm, and the two form a V-shaped structure. The limiting surface and the drill rod supporting surface are respectively arranged on the limiting arm and the load-bearing arm, and are located on the inner side of the V-shaped structure. A guide surface is provided on the side of the load-bearing arm away from the drill rod supporting surface. When the support hook is in a free state, the angle α between the guide surface and the vertical direction is greater than 0°.

7. The automatic unhooking device for a drill rod according to claim 6, characterized in that: A first rounded portion is provided on a side of the end of the limiting arm away from the load-bearing arm.

8. The automatic unhooking device for a drill rod according to claim 1, characterized in that: A second chamfer is provided on one side of the end of the hook stopper away from the limiting surface.

9. The automatic unhooking device for a drill rod according to claim 1, characterized in that: A drill rod stopper is provided on the support hook.

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