Inverted well hob lifting appliance

Abstract

The utility model discloses a raise well hob lifting appliance which comprises a lifting ring, a lifting frame and lifting knife assemblies, the lifting ring is detachably installed on the lifting frame, a center hole is formed in the center of the lifting frame, at least three sets of installation openings which take the center hole as the center and are evenly distributed are formed in the outer end of the lifting frame, and each installation opening is movably provided with one lifting knife assembly. The hanging knife assembly comprises a hanging knife, the hanging knife is provided with a short arm end and a long arm end, the end close to the installation opening is the short arm end, the lower end of the short arm end horizontally extends outwards to be provided with a limiting part, and the limiting part is clamped at the bottom of the hanging frame and used for keeping the hanging knife in the horizontal state. The lower end of the outer part of the long arm end is provided with a guide inclined surface which acts with the inner wall of a product to drive the hanging knife to rotate upwards to be closed, and the upper plane of the long arm end is provided with a supporting surface used for supporting the product, so that the hanging knife can be automatically clamped in the through hole of the rolling wheel through the characteristics of the hanging knife, manual close-range operation is not needed, the operation is simple, and the production efficiency is high. The gravity center is stable, and positioning is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering, in particular to an inverted well hoist. Background Art

[0002] Raise boring machine construction is widely used in engineering fields such as mining and hydropower station construction due to its advantages of safety, high efficiency and high hole quality. The roller of the roller cutter is very heavy. The roller is provided with a first step through hole, a second cylindrical through hole and a third cylindrical through hole. It is difficult to carry manually and needs to be hoisted during the manufacturing process. Generally, magnetic lifting or rope lifting is adopted for hoisting. Although magnetic suction is more convenient, the width of the upper end face of the roller is too small and the width of the adsorbed surface is narrow. Figure 1 As shown, the roller is very heavy, and magnetic lifting is unsafe and can easily cause safety accidents during the manufacturing process. The lifting rope has low cost, but it will shake during the manufacturing process, resulting in poor positioning function and inconvenient operation.

[0003] The utility model patent with application number CN202020688241.0 discloses a lifting tool for large annular blanks. The lifting tool is performed by clamping the claws under the annular blanks. The lifting tool has the following defects when in use: (1) a pad needs to be placed under the blank in advance; (2) the opening and closing and angle of the claws need to be manually adjusted; (3) the lifting tool adopts a connecting rod structure, which has poor stability. The construction site of the raise boring machine is generally in engineering areas such as mines and hydropower station construction. The geographical structure is complex. The roller of the raise boring machine hoist is very heavy, the operator's work is difficult and the operation is difficult, which brings many safety hazards to the operator; (4) during lifting, the claws need to pass through the blank and clamp under the blank. If the height of the hoisted product exceeds the length of the claws, the product cannot be lifted. When the claws move to the extreme position, the claws cannot continue to open.

[0004] Based on the above defects and deficiencies, it is necessary to improve the existing technology and design a well-reversing roller cutter sling. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a well-turning roller cutter sling, which can stably and quickly clamp the sling cutter in the roller annular cavity, has a stable center of gravity, is easy to operate, and is safe and reliable.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a hoist for raising the shaft, which comprises a lifting ring, a hanging bracket and a lifting cutter assembly.

[0007] Preferably, the lifting ring can be detachably mounted on the hanger, a center hole is provided at the center position of the hanger, and at least three groups of mounting openings centered on the center hole and evenly distributed are provided at the outer end of the hanger, and a lifting knife assembly is movably installed at each mounting opening, and the lifting knife assembly includes a lifting knife, and the lifting knife is provided with a short arm end and a long arm end, and the short arm end is close to one end of the mounting opening, and a limiting portion is provided at the lower end of the short arm end extending horizontally outward, and the limiting portion is clamped at the bottom of the hanger for keeping the lifting knife in a horizontal state, and a guiding inclined surface is provided at the outer lower end of the long arm end for driving the lifting knife to rotate upward and close by acting on the inner wall of the product, and a supporting surface for supporting the product is provided on the upper plane of the long arm end.

[0008] Preferably, the lifting ring includes a lifting part and a screw part, the lifting part is extended downwardly to be provided with a screw part, the lower end of the screw part is provided with an external thread, the screw part passes through the center hole of the hanger and is threadedly connected to the fastening nut below, and the fastening nut is rotated to fix the lifting ring on the hanger.

[0009] Preferably, two opposite through holes are provided on two walls of the installation opening.

[0010] Preferably, the lifting knife assembly also includes bolts and hexagonal nuts, and a mounting hole is provided at an eccentric position of the lifting knife. Bolts are provided at the through holes on both walls of the mounting hole and the mounting port, which are locked by external hexagonal nuts, so that the lifting knife can be rotatably mounted at the mounting port.

[0011] Preferably, a cambered surface is provided on one side of the short arm end of the lifting knife for allowing the lifting knife to rotate upward with the mounting hole as the center.

[0012] Preferably, the diameter of the lifting tool in the closed state is smaller than the diameter of the lifting tool in the open state, which is smaller than the diameter of the second cylindrical through hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The lifting ring is installed at the center hole of the hanger to ensure that the force on the lifting ring is even during the lifting process, thereby maintaining a stable center of gravity;

[0015] The lifting knife includes a short arm end and a long arm end, which rotate downward. The limiter is set to be able to be stuck at the bottom of the hanger to limit the long arm end from continuing to rotate downward, keeping the lifting knife in a horizontal state. The lifting knife can be automatically deployed without manual close operation;

[0016] When the spreader descends, the guide slope of the lifting knife contacts the inner wall of the product. Under the force of the inner wall of the product on the guide slope, the lifting knife automatically rotates upward and closes. The lifting knife cooperates with the inner wall of the product and closes automatically, without manual close operation;

[0017] The upper plane of the long arm is the lifting support surface. When the sling moves upward, the support surface supports the lower end of the first step through hole of the product, thereby lifting the product;

[0018] The structure design of this spreader is simple and ingenious. During use, it can automatically clamp the lifting knife inside the roller through hole through its own characteristics, without the need for manual close-range operation. The operation is simple, safe and reliable, with a stable center of gravity and reliable positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the lifting product.

[0020] Figure 2 The figure is a structural diagram of an inverted hoist.

[0021] Figure 3 The diagram is a schematic diagram of the cutter structure of an inverted well cutter hoist.

[0022] Figure 4 The figure is a schematic diagram of the hanger structure of an inverted hoist.

[0023] Figure 5 The figure is a schematic diagram of the cross-sectional structure of an inverted hoist.

[0024] Among them, 1. lifting ring; 2. hanger; 3. lifting knife assembly; 10. center hole; 11. fastening nut; 30. lifting knife; 31. bolt; 32. hexagonal nut; 20. mounting port; 301. mounting hole; 302. limiting part; 303. guide slope; 304. supporting surface; 305. avoidance arc surface; 51. first stepped through hole; 52. second cylindrical through hole; 53. third cylindrical through hole. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0026] like Figure 1 As shown, the roller for the product to be hoisted is provided with a first stepped through hole 51, a second cylindrical through hole 52 and a third cylindrical through hole 53, wherein the aperture of the second cylindrical through hole 52 is greater than the aperture of the first stepped through hole 51 and the aperture of the third cylindrical through hole 53.

[0027] like Figure 2 As shown, an embodiment of a hoist for raising a shaft cutter of the present invention comprises: a lifting ring 1, a hanging bracket 2 and a lifting cutter assembly 3.

[0028] The lifting ring 1 can be detachably mounted on the hanger 2. The lifting ring 1 comprises a lifting portion and a screw portion. The lifting portion is downwardly extended to be provided with the screw portion, and the lower end of the screw portion is provided with an external thread.

[0029] A center hole 10 is provided at the center of the hanger 2 , through which the screw portion of the hanger rod 1 passes. The screw portion is threadedly connected to a fastening nut 11 below the center hole 10 . The fastening nut 11 is rotated to fix the lifting ring 1 on the hanger 2 .

[0030] The outer end of the hanger 2 is provided with at least three groups of mounting openings 20 centered on the center hole 10 and evenly distributed. Two opposite through holes are provided on the two walls of the mounting opening 20. A lifting knife assembly 3 is movably installed at each mounting opening 20. The lifting knife assembly 3 includes a lifting knife 30, a bolt 31 and a hexagonal nut 32. A mounting hole 301 is provided at an eccentric position of the lifting knife 30. The mounting hole 301 is communicated with the through holes on the two walls of the mounting opening 20. The bolt 31 passes through the mounting hole 301 and the through holes on the two walls and is locked by the outer hexagonal nut 32, so that the lifting knife 30 is rotatably installed at the mounting opening 20.

[0031] like Figure 3 As shown, the lifting knife 30 is provided with a short arm end and a long arm end. The end close to the mounting port 20 is the short arm end. Under the action of gravity, the long arm end of the lifting knife 30 rotates downward with the mounting hole 301 as the center, and a limiting portion 302 is provided at the lower end of the short arm end. The limiting portion 302 can be stuck at the bottom of the hanger 2 to limit the long arm end from continuing to rotate downward, thereby keeping the lifting knife 30 rotated to a horizontal state.

[0032] A guiding slope 303 is provided at the outer lower end of the long arm end. When the sling moves downward, the guiding slope 303 can contact the inner wall of the first stepped through hole 51 of the product. Since the lifting knife 30 is movably connected, the sling continues to move downward, and the lifting knife 30 rotates upward under the action of the inner wall of the first stepped through hole 51 on the guiding slope 303. The three groups of lifting knives 30 rotate upward and close, and the sling can enter the second cylindrical through hole 52 through the first stepped through hole 51.

[0033] After the sling enters the second cylindrical through hole 52, the guiding inclined surface 303 loses the force exerted by the inner wall of the first stepped through hole 51. Therefore, under the action of gravity, the long arm end of the lifting knife 30 rotates downward with the mounting hole 301 as the center, and the limiting portion 302 is stuck at the bottom of the hanger 2, keeping the lifting knife 30 in a horizontal state. The upper plane of the long arm end is the lifting support surface 304. When the sling moves upward, the support surface 304 is stuck at the lower end of the first stepped through hole 51 of the product, thereby lifting the product.

[0034] An avoidance arc surface 305 is provided on one side of the short arm end of the lifting knife 30 . The curvature of the avoidance arc surface 305 matches the inner wall of the mounting opening 20 , allowing the lifting knife 30 to rotate upward with the mounting hole 301 as the center.

[0035] The diameter of the second cylindrical through hole 52 is greater than the diameter of the sling when the lifting knife 30 is in the open state and greater than the diameter of the sling when the lifting knife 30 is in the closed state.

[0036] When the utility model is working, the hoist is lowered, and the guide inclined surface 303 contacts the inner wall of the first stepped through hole 51 of the product. Under the action of the inner wall of the first stepped through hole 51 on the guide inclined surface 303, the lifting knife 30 automatically rotates upward and closes. After closing, the lifting device continues to descend into the second cylindrical through hole 52 through the first stepped through hole 51. Since the aperture of the second cylindrical through hole 52 is greater than the diameter of the lifting device in the open state of the lifting knife 30, the lifting knife 30 in the second cylindrical through hole 52 is subjected to the action of gravity. The long arm end rotates downward with the mounting hole 301 as the center, and the limiting part 302 is stuck at the bottom of the hanger 2, limiting the length The arm end continues to rotate downward to keep the lifting knife 30 in a horizontal state. At this time, the supporting surface 304 of the lifting knife 30 is at the lower end of the first stepped through hole 51 of the product. The lifting ring 1 is lifted, and the supporting surface 304 supports the lower end of the first stepped through hole 51 of the product, thereby lifting the product. After the product processing is completed, when the sling is taken out, the sling is controlled to tilt downward, and the guide inclined surfaces 303 of the two lifting knives 30 tilted downward contact with the inner wall of the third cylindrical through hole 53, and the lifting knives 30 automatically close upward. The other lifting knife 30 tilts upward and is first taken out from the middle of the first stepped through hole 51, and then the two downward-facing lifting knives 30 are taken out from the product.

[0037] The utility model relates to an inverted well cutter hoist, which can automatically clamp the hoisting knife inside the roller through hole through its own characteristics during use, without the need for manual close-range operation, and is simple to operate, safe and reliable, with a stable center of gravity and reliable positioning.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hoisting cutter hoist, comprising a lifting ring (1), a hanger (2) and a lifting cutter assembly (3), characterized in that: The hanging ring (1) can be detachably mounted on the hanger (2); a center hole (10) is provided at the center position of the hanger (2); at least three groups of mounting openings (20) centered on the center hole (10) and evenly distributed are provided at the outer end of the hanger (2); a hanging knife assembly (3) is movably mounted at each mounting opening (20); the hanging knife assembly (3) includes a hanging knife (30); the hanging knife (30) is provided with a short arm end and a long arm end; the short arm end is close to one end of the mounting opening (20); a limiting portion (302) is provided at the lower end of the short arm end extending horizontally outward; the limiting portion (302) is clamped at the bottom of the hanger (2) for keeping the hanging knife (30) in a horizontal state; a guiding inclined surface (303) is provided at the outer lower end of the long arm end for driving the hanging knife (30) to rotate upward and close by acting on the inner wall of the product; a supporting surface (304) is provided on the upper plane of the long arm end for supporting the product.

2. The inverted hoist cutter hanger according to claim 1, characterized in that: The lifting ring (1) comprises a lifting part and a screw part, wherein the lifting part extends downwardly and is provided with a screw part, and an external thread is provided at the lower end of the screw part. The screw part passes through the central hole (10) of the hanger (2) and is threadedly connected with the fastening nut (11) below. The fastening nut (11) is rotated to fix the lifting ring (1) on the hanger (2).

3. The inverted hoist cutter hanger according to claim 1, characterized in that: Two opposite through holes are provided on the two walls of the installation opening (20).

4. The inverted hoist cutter hanger according to claim 3, characterized in that: The lifting knife assembly (3) further comprises a bolt (31) and a hexagonal nut (32); a mounting hole (301) is provided at an eccentric position of the lifting knife (30); bolts (31) are provided at through holes on both walls of the mounting hole (301) and the mounting opening (20) and are locked by means of an outer hexagonal nut (32), so that the lifting knife (30) is rotatably mounted at the mounting opening (20).

5. The inverted hoist cutter hanger according to claim 4, characterized in that: A cambered surface (305) is provided on one side of the short arm end of the lifting knife (30) for allowing the lifting knife (30) to rotate upward with the mounting hole (301) as the center.

6. The inverted hoist cutter hanger according to claim 1, characterized in that: The diameter of the lifting knife (30) in the closed state is less than the diameter of the lifting tool in the open state of the lifting knife (30) and is less than the aperture of the second cylindrical through hole (52).

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