A quick unhooking device for hoisting a bite pile steel casing

Abstract

The utility model relates to building construction technical field especially relates to a kind of quick unhooking device of interlock pile steel casing hoisting, it includes: n-shaped lifting ring, outer sleeve pipe is vertically fixedly connected in the lower part of left side outer end surface of n-shaped lifting ring, two transverse through pin holes are symmetrically opened in the lower part left and right ends of n-shaped lifting ring, inner pin is respectively slidably connected two pin holes, the left end of inner pin is movably arranged in the inner chamber of outer sleeve pipe, the left side coaxial fixed connection of inner pin outer wall is limited flange, baffle ring is coaxially fixedly connected in the left side of outer sleeve pipe inner chamber, spring is set in the inner chamber of outer sleeve pipe and is set on inner pin, the right end of spring is respectively pressed contact baffle ring and the left end of limiting flange, the left end of inner pin is fixedly connected with pull ring, pulley assembly is arranged in the lower part of outer sleeve pipe left end, one end of traction rope is fixedly connected on pull ring, the other end is movably arranged baffle ring inner chamber and is extended to the below of outer sleeve pipe by pulley assembly, the utility model provides a kind of interlock pile steel casing hoisting device capable of quick unhooking.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a quick unhooking device for hoisting steel casings of interlocking piles. Background Technology

[0002] With the increasing maturity of construction technology, bored pile technology has flourished. Among the various borehole support methods for bored piles, steel casings are widely used. They offer advantages such as preventing borehole collapse in quicksand and silt formations, maintaining borehole water pressure, preventing piping, high verticality control accuracy, providing a rigid guiding channel for the sinking of the reinforcing cage, shortening the construction period, and reusability. They are suitable for bored piles of various geological conditions and pile diameters. However, steel casings are typically 4–8 meters long. Traditional lifting and installation of steel casings usually involves welding lifting lugs or using wire ropes and shackles for binding. After hoisting to the designated position, workers need to climb to the top of the steel casing to disassemble the wire ropes and shackles. This presents the following problems: welding lifting lugs or disassembling wire ropes and shackles requires high-altitude operations, posing significant safety hazards; and the unhooking efficiency is low, affecting construction progress.

[0003] Chinese patent CN119100242A discloses a quick unhooking device for steel structure hoisting, including multiple components such as an inverted U-shaped ring, an outer tube, an inner pin, and a spring. It can be used for automatic unhooking during rapid steel structure hoisting, but it has the following drawbacks: 1. The spring's function is to push the inner pin outwards, making it inconvenient for hooking (manual pushing of the inner pin is required during hooking, and the hand can only be released after the lifting device is raised and the inverted U-shaped ring is under force); 2. After the load touches the ground, the inner pin may automatically pop out, causing the load to fall; 3. The inner pin is located in a guide groove, requiring the pulling of a thin rope for unhooking, but since the thin rope pulls the inner pin horizontally, the inner pin may not be able to disengage from the guide groove; 4. The thin rope can only pull horizontally, and when the load is at a high position and the thin rope forms a large angle with the inner pin, the device cannot be used. Utility Model Content

[0004] The purpose of this utility model is to provide a quick unhooking device for hoisting steel casings of interlocking piles, so as to solve the technical problems existing in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A quick-release device for hoisting interlocking pile steel casing includes: an n-shaped lifting ring, an outer sleeve, an inner pin, a limiting flange, a retaining ring, a spring, a pull ring, and a pulling rope. The n-shaped lifting ring has its opening facing downwards and a hoisting assembly detachably fixed to its upper middle position. The outer sleeve is vertically fixed to the lower left side of the outer end face of the n-shaped lifting ring. Two transversely penetrating pin holes are symmetrically opened at the lower left and right ends of the n-shaped lifting ring. The inner pin is slidably connected to the two pin holes. The left end of the inner pin is movably disposed within the inner cavity of the outer sleeve. A limiting flange is coaxially fixed to the left side of the outer wall of the inner pin. The outer diameter of the limiting flange is smaller than the inner diameter of the outer sleeve. A retaining ring is coaxially fixedly connected to the left side of the inner cavity of the outer sleeve. A spring is disposed in the inner cavity of the outer sleeve and sleeved on the inner pin. The two ends of the spring press against the right end of the retaining ring and the left end of the limiting flange, respectively. A pull ring is fixedly connected to the left end of the inner pin. A pulley assembly is provided at the lower left end of the outer sleeve. One end of the pull rope is fixedly connected to the pull ring, and the other end movably passes through the inner cavity of the retaining ring and extends to the bottom of the outer sleeve through the pulley assembly. The pulley assembly is tumblingly connected to the pull rope.

[0007] Furthermore, the lifting assembly includes a shackle and a wire rope. The upper middle part of the n-shaped lifting ring has a lifting hole that runs through the front and back. The shackle is a D-shaped shackle. The pin of the shackle passes through one side of the lower end of the n-shaped shackle body and the lifting hole and is threaded to the other side of the lower end of the n-shaped shackle body. The wire rope is fixedly connected to the n-shaped shackle body.

[0008] Furthermore, the pin hole and the inner pin are in clearance fit.

[0009] Furthermore, when the right end of the limiting flange contacts the outer wall of the left end of the n-shaped lifting ring, the right end of the inner pin slides through the pin hole on the right side and extends to the outer side of the right end of the n-shaped lifting ring.

[0010] Furthermore, the retaining ring is circular, and the inner diameter of the retaining ring is smaller than the diameter of the inner pin. The pull ring can move laterally through the inner cavity of the retaining ring. When the left end of the inner pin contacts the right end of the retaining ring, the right end of the inner pin is completely retracted into the pin hole on the left side and does not slide out of the pin hole.

[0011] Furthermore, the pulley assembly includes: a bracket, a pulley shaft, and a pulley. Two brackets are provided, and the two brackets are symmetrically fixedly connected to the front and rear sides of the left end of the outer tube. The pulley is rotatably installed in the lower part between the two brackets through the pulley shaft. A semi-circular annular rope groove is opened in the middle of the outer wall of the pulley, and the pulling rope cooperates with the annular rope groove.

[0012] Furthermore, the pulley assembly also includes: a bearing, the pulley being annular, the inner wall of the pulley being fixedly connected to the outer ring of the bearing, the inner ring of the bearing being fixedly connected to the middle of the outer wall of the pulley shaft, and the front and rear ends of the pulley shaft being fixedly connected to the lower parts of two supports respectively.

[0013] Furthermore, it also includes: a rope pressing assembly, which includes: a rope pressing wheel, a rope pressing wheel shaft, a connecting rod, a hinge shaft, and a torsion spring. There are two connecting rods. The outer wall of the rope pressing wheel has a second annular rope groove with a semi-circular cross-section. The pull rope cooperates with the second annular rope groove and passes between the first and second annular rope grooves. The rope pressing wheel is rotatably mounted on the lower part between the two connecting rods via the rope pressing wheel shaft. The upper part of the connecting rod is rotatably connected to the hinge shaft. The front and rear ends of the hinge shaft are symmetrically fixed to the upper parts of the two supports. A torsion spring is sleeved in the middle of the hinge shaft. One end of the torsion spring is fixedly connected to the rear connecting rod, and the other end of the torsion spring is fixedly connected to the upper left end of the outer sleeve.

[0014] Furthermore, the rope pressing assembly also includes: a second bearing, the rope pressing wheel is annular, the inner wall of the rope pressing wheel is fixedly connected to the outer ring of the second bearing, and the inner ring of the second bearing is fixedly connected to the middle part of the outer wall of the rope pressing wheel shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] When hoisting a steel casing, simply insert the casing into the N-shaped lifting ring, then pass the inner pin through the lifting hole on the casing, and finally hoist the casing using hoisting equipment, wire rope, and shackles. When the casing is hoisted to the designated position, simply pull the traction rope to fully retract the inner pin into the left pin hole of the N-shaped lifting ring, allowing for quick unhooking. Because the spring is always compressed, the casing is less prone to unhooking. The pulley assembly reduces friction during the pulling process, making it easier for the inner pin to disengage from the pin hole. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention when the inner pin is fully extended;

[0019] Figure 3 This is a cross-sectional view of the present invention when the inner tube is fully retracted.

[0020] The labels in the attached diagram are as follows: 1-n-shaped lifting ring, 101-pin hole, 2-outer sleeve, 3-inner pin, 4-limiting flange, 5-retaining ring, 6-spring, 7-pull ring, 8-pull rope, 9-bracket, 10-pulley shaft, 11-bearing one, 12-pulley, 13-rope pressing wheel, 14-bearing two, 15-rope pressing wheel shaft, 16-connecting rod, 17-hinged shaft, 18-torsion spring, 19-shackle, 20-wire rope. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] See Figures 1-3 As shown, a quick-release device for hoisting interlocking pile steel casing includes: an n-shaped lifting ring 1, an outer sleeve 2, an inner pin 3, a limiting flange 4, a retaining ring 5, a spring 6, a pull ring 7, and a pulling rope 8. The n-shaped lifting ring 1 has its opening facing downwards and is detachably fixed to the middle of its upper part with a hoisting assembly. The outer sleeve 2 is vertically fixed to the lower left side of the outer end face of the n-shaped lifting ring 1. Two transverse through pin holes 101 are symmetrically opened at the lower left and right ends of the n-shaped lifting ring 1. The inner pin 3 is slidably connected to the two pin holes 101 respectively, and the pin holes 101 and the inner pin 3 are clearance-fitted. The left end of the inner pin 3 is movably disposed in the inner cavity of the outer sleeve 2. A limiting flange 4 is coaxially fixedly connected to the left side of the outer wall. The outer diameter of the limiting flange 4 is smaller than the inner diameter of the outer tube 2. A retaining ring 5 is coaxially fixedly connected to the left side of the inner cavity of the outer tube 2. A spring 6 is set in the inner cavity of the outer tube 2 and sleeved on the inner pin 3. The two ends of the spring 6 press against the right end of the retaining ring 5 and the left end of the limiting flange 4, respectively. A pull ring 7 is fixedly connected to the left end of the inner pin 3. A pulley assembly is set at the lower left end of the outer tube 2. One end of the pull rope 8 is fixedly connected to the pull ring 7, and the other end moves through the inner cavity of the retaining ring 5 and extends to the bottom of the outer tube 2 through the pulley assembly. The pulley assembly is tumblingly connected to the pull rope 8.

[0023] In this embodiment, the hoisting assembly includes: a shackle 19 and a wire rope 20. The upper middle part of the n-shaped lifting ring 1 has a through-hole. The shackle 19 is a D-shaped shackle. The pin of the shackle 19 passes through one side of the lower end of the n-shaped shackle body and the lifting hole and is threaded to the other side of the lower end of the n-shaped shackle body. The wire rope 20 is fixedly connected to the n-shaped shackle body of the shackle 19.

[0024] When the right end of the limiting flange 4 contacts the outer wall of the left end of the n-shaped lifting ring 1, the right end of the inner pin 3 slides through the right pin hole 101 and extends to the outer side of the right end of the n-shaped lifting ring 1, thereby improving the safety of the steel casing hoisting.

[0025] In this embodiment, the retaining ring 5 is annular, and the inner diameter of the retaining ring 5 is smaller than the diameter of the inner pin 3. The pull ring 7 can move laterally through the inner cavity of the retaining ring 5. When the left end of the inner pin 3 contacts the right end of the retaining ring 5, the right end of the inner pin 3 is completely retracted into the pin hole 101 on the left side and does not slide out of the pin hole 101, so that the steel casing can be completely unhooked after hoisting.

[0026] In this embodiment, the pulley assembly includes: a bracket 9, a pulley shaft 10, and a pulley 12. Two brackets 9 are provided, and the two brackets 9 are symmetrically fixedly connected to the front and rear sides of the left end of the outer sleeve 2. The pulley 12 is rotatably installed in the lower part between the two brackets 9 through the pulley shaft 10. A semi-circular annular rope groove is opened in the middle of the outer wall of the pulley 12, and the pulling rope 8 cooperates with the annular rope groove. The pulley assembly also includes: a bearing 11. The pulley 12 is annular. The outer ring of the bearing 11 is fixedly connected to the inner wall of the pulley 12. The inner ring of the bearing 11 is fixedly connected to the middle of the outer wall of the pulley shaft 10. The front and rear ends of the pulley shaft 10 are respectively fixedly connected to the lower parts of the two brackets 9.

[0027] In this embodiment, it also includes a rope pressing assembly, which includes a rope pressing wheel 13, a rope pressing wheel shaft 15, a connecting rod 16, a hinge shaft 17, and a torsion spring 18. Two connecting rods 16 are provided. A semi-circular annular rope groove 2 is formed in the middle of the outer wall of the rope pressing wheel 13. A pull rope 8 cooperates with the annular rope groove 2 and passes between the annular rope groove 1 and the annular rope groove 2. The rope pressing wheel 13 is rotatably mounted on the lower part between the two connecting rods 16 via the rope pressing wheel shaft 15. The upper part of the connecting rod 16 is rotatably connected to the hinge shaft 17, and the front and rear ends of the hinge shaft 17 are respectively connected to… The hinge shaft 17 is fixedly connected to the upper part of the two supports 9. A torsion spring 18 is sleeved in the middle of the hinge shaft 17. One end of the torsion spring 18 is fixedly connected to the connecting rod 16 on the rear side, and the other end of the torsion spring 18 is fixedly connected to the upper left end of the outer sleeve 2. The rope pressing assembly also includes: a second bearing 14, a rope pressing wheel 13 is annular, the inner wall of the rope pressing wheel 13 is fixedly connected to the outer ring of the second bearing 14, and the inner ring of the second bearing 14 is fixedly connected to the middle of the outer wall of the rope pressing wheel shaft 15. The rope pressing assembly can restrict the pulling rope 8 to the pulley 12 and prevent the pulling rope 8 from detaching from the pulley 12.

[0028] Working principle: When hoisting the steel casing, first pull the inner pin 3 with the pull rope 8, so that the inner pin 3 is fully retracted into the pin hole 101 on the left side. Then, the steel casing is inserted into the n-shaped lifting ring 1. Next, release the pull rope 8. Under the action of the spring 6, the inner pin 3 automatically passes through the lifting hole opened on the steel casing and through the pin hole 101 on the right side, thus hooking the steel casing. Then, the steel casing is hoisted with the hoisting equipment, wire rope 20 and shackle 19. When the steel casing is hoisted to the designated position, simply pull the pull rope 8 to make the inner pin 3 fully retract into the pin hole 101 on the left side of the n-shaped lifting ring 1, so that the steel casing can be quickly unhooked. Since the spring is always in a compressed state, the steel casing is not easy to unhook during the hoisting process. The pulley assembly reduces the friction of the pull rope 8 during the pulling process, making it easier for the inner pin 3 to come out of the pin hole 101.

[0029] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the present utility model's technical solution and based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A rapid unhooking device for hoisting interlocking pile steel casing, characterized in that, include: The components include an n-shaped lifting ring (1), an outer tube (2), an inner pin (3), a limiting flange (4), a retaining ring (5), a spring (6), a pull ring (7), and a pulling rope (8). The n-shaped lifting ring (1) has its opening facing downwards and is detachably fixed to a lifting assembly at its upper middle position. The outer tube (2) is vertically fixed to the lower left side of the outer end face of the n-shaped lifting ring (1). Two transverse through pin holes (101) are symmetrically opened at the lower left and right ends of the n-shaped lifting ring (1). The inner pin (3) is slidably connected to the two pin holes (101). The left end of the inner pin (3) is movably disposed in the inner cavity of the outer tube (2). The limiting flange (4) is coaxially fixed to the left side of the outer wall of the inner pin (3). The outer diameter of the limiting flange (4) is smaller than the inner diameter of the outer sleeve (2); a retaining ring (5) is coaxially fixedly connected to the left side of the inner cavity of the outer sleeve (2); the spring (6) is set in the inner cavity of the outer sleeve (2) and sleeved on the inner pin (3); the two ends of the spring (6) press against the right end of the retaining ring (5) and the left end of the limiting flange (4) respectively; a pull ring (7) is fixedly connected to the left end of the inner pin (3); a pulley assembly is provided at the lower left end of the outer sleeve (2); one end of the pulling rope (8) is fixedly connected to the pull ring (7); the other end moves through the inner cavity of the retaining ring (5) and extends to the bottom of the outer sleeve (2) through the pulley assembly; the pulley assembly is tumblingly connected to the pulling rope (8).

2. The quick-release device for hoisting interlocking pile steel casing according to claim 1, characterized in that: The hoisting assembly includes a shackle (19) and a wire rope (20). The upper middle part of the n-shaped lifting ring (1) has a through-hole. The shackle (19) is a D-shaped shackle. The pin of the shackle (19) passes through one side of the lower end of the n-shaped buckle body and the lifting hole and is threaded to the other side of the lower end of the n-shaped buckle body. The wire rope (20) is fixedly connected to the n-shaped buckle body of the shackle (19).

3. The quick-release device for hoisting interlocking pile steel casing according to claim 1, characterized in that: The pin hole (101) and the inner pin (3) are fitted with a clearance.

4. The quick-release device for hoisting interlocking pile steel casing according to claim 1, characterized in that: When the right end of the limiting flange (4) contacts the outer wall of the left end of the n-shaped lifting ring (1), the right end of the inner pin (3) slides through the right pin hole (101) and extends to the outer side of the right end of the n-shaped lifting ring (1).

5. The quick-release device for hoisting interlocking pile steel casing according to claim 1, characterized in that: The retaining ring (5) is circular, and the inner diameter of the retaining ring (5) is smaller than the diameter of the inner pin (3). The pull ring (7) can move laterally through the inner cavity of the retaining ring (5). When the left end of the inner pin (3) contacts the right end of the retaining ring (5), the right end of the inner pin (3) is completely retracted into the pin hole (101) on the left side and does not slide out of the pin hole (101).

6. The quick-release device for hoisting interlocking pile steel casing according to claim 1, characterized in that: The pulley assembly includes: a bracket (9), a pulley shaft (10), and a pulley (12). There are two brackets (9), which are symmetrically fixedly connected to the front and rear sides of the left end of the outer tube (2). The pulley (12) is rotatably installed between the two brackets (9) through the pulley shaft (10). A semi-circular annular rope groove is provided in the middle of the outer wall of the pulley (12), and the pulling rope (8) cooperates with the annular rope groove.

7. A quick-release device for hoisting interlocking pile steel casing according to claim 6, characterized in that: The pulley assembly further includes: a bearing (11), the pulley (12) is annular, the inner wall of the pulley (12) is fixedly connected to the outer ring of the bearing (11), the inner ring of the bearing (11) is fixedly connected to the middle part of the outer wall of the pulley shaft (10), and the front and rear ends of the pulley shaft (10) are respectively fixedly connected to the lower part of two brackets (9).

8. A quick-release device for hoisting interlocking pile steel casing according to claim 6, characterized in that: Also includes: The rope pressing assembly includes: a rope pressing wheel (13), a rope pressing wheel shaft (15), a connecting rod (16), a hinge shaft (17), and a torsion spring (18). Two connecting rods (16) are provided. A semi-circular annular groove (2) is formed in the center of the outer wall of the rope pressing wheel (13). The pulling rope (8) cooperates with the annular groove (2) and passes between the annular groove (11) and the annular groove (2). The rope pressing wheel (13) is connected to the rope pressing wheel shaft. (15) Rotatably installed between two connecting rods (16) at the lower part, the upper part of the connecting rod (16) is rotatably connected to a hinge shaft (17), the front and rear ends of the hinge shaft (17) are respectively symmetrically fixed to the upper parts of two supports (9), a torsion spring (18) is sleeved in the middle of the hinge shaft (17), one end of the torsion spring (18) is fixedly connected to the rear connecting rod (16), and the other end of the torsion spring (18) is fixedly connected to the upper left end of the outer sleeve (2).

9. A quick-release device for hoisting interlocking pile steel casing according to claim 8, characterized in that: The rope pressing assembly further includes: a second bearing (14), the rope pressing wheel (13) is annular, the inner wall of the rope pressing wheel (13) is fixedly connected to the outer ring of the second bearing (14), and the inner ring of the second bearing (14) is fixedly connected to the middle part of the outer wall of the rope pressing wheel shaft (15).

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