Ladder type reverse circulation percussion hammer suitable for drilling into super deep bridge piles on water platform

Abstract

This utility model relates to the technical field of bridge pile construction, and discloses a stepped reverse circulation impact hammer suitable for drilling ultra-deep bridge piles on water platforms. It includes a gravity cylinder with a hollow cavity through which a slag discharge pipe passes. Multiple annular gravity rings are formed at the lower part of the gravity cylinder, with diameters decreasing, arranged in a stepped manner from top to bottom along the cylinder. Multiple hammer teeth are provided at the bottom of the annular gravity rings. The reverse circulation impact hammer is driven by a drilling rig to drill in a pile hole with a steel casing. The reverse circulation impact hammer drills through the multiple annular gravity rings against the rock or strata in the pile hole. The annular gravity rings utilize multiple hammer teeth in a stepped manner to cut the strata at multiple levels, increasing the impact hammer's counterweight, increasing the impact force, and increasing drilling efficiency. An air-lift reverse circulation structure is used to discharge slag through the slag discharge pipe in the cavity, further improving drilling efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge pile construction, and more specifically, to a stepped reverse circulation impact hammer suitable for drilling ultra-deep bridge piles on water platforms. Background Technology

[0002] In large-scale bridge construction projects, the construction of bridge pile holes is a crucial step, requiring the penetration of complex geological structures, including water bodies, mud layers, and rock layers.

[0003] At the construction site, temporary water-based construction platforms are set up to allow heavy machinery such as concrete mixer trucks, steel bar transport vehicles, and equipment transport vehicles to pass through. Therefore, having a stable water-based construction platform is a necessary prerequisite for carrying out bridge pile construction operations.

[0004] In traditional construction methods, air-lift reverse circulation drilling rigs or percussion drilling rigs are often used for bridge pile hole operations. However, air-lift reverse circulation drilling rigs have low drilling efficiency due to long rock grinding time, and the bolt connections on the drill rod are prone to wear and breakage, increasing the risk of drill bit loss and retrieval during construction. Utility Model Content

[0005] The purpose of this invention is to provide a stepped reverse circulation impact hammer suitable for drilling ultra-deep bridge piles on water platforms, aiming to solve the problem of low drilling efficiency in the drilling process of ultra-deep bridge piles in the prior art.

[0006] This utility model is implemented as follows: a stepped reverse circulation impact hammer suitable for drilling ultra-deep bridge piles on a floating platform includes a gravity cylinder. The gravity cylinder has a hollow cavity through which a slag discharge pipe passes and runs vertically. The hollow cavity runs vertically through the gravity cylinder. Multiple annular gravity rings are formed at the lower part of the gravity cylinder. The diameters of the multiple annular gravity rings decrease from large to small and are arranged in a stepped manner from top to bottom along the gravity cylinder. The multiple annular gravity rings are arranged sequentially at intervals and nested sequentially at intervals. Multiple hammer teeth are provided at the bottom of the annular gravity rings.

[0007] Furthermore, a hollow area extending vertically is formed between adjacent annular gravity rings.

[0008] Furthermore, multiple connecting strips are provided between adjacent annular gravity rings. The connecting strips are arranged at an angle, and each end of the connecting strip is connected to two adjacent annular gravity rings respectively. The multiple connecting strips are arranged around the annular gravity rings at intervals along their circumference, and the hollow area is formed between adjacent connecting strips.

[0009] Furthermore, multiple triangular gravity plates are provided on the outer periphery of the gravity cylinder. The multiple triangular gravity plates are arranged vertically around the outer periphery of the gravity cylinder at intervals. The annular gravity rings are connected to the gravity cylinder through the triangular gravity plates. The multiple annular gravity rings are fixedly connected along the direction from the middle of the triangular gravity plates to the bottom of the triangular gravity plates.

[0010] Furthermore, the triangular gravity plate is provided with a hanging plate, and multiple hanging plates are connected through a retrieval ring. The retrieval ring is arranged around the circumference of the gravity cylinder, and the retrieval ring is spaced apart from the outer wall of the gravity cylinder.

[0011] Furthermore, the salvage ring is located above the annular gravity ring, and the salvage ring and the annular gravity ring are arranged vertically.

[0012] Furthermore, a plurality of fixed impact teeth are welded to the bottom of the gravity cylinder, and the plurality of fixed impact teeth are arranged at intervals around the bottom of the gravity cylinder in a circumferential manner.

[0013] Furthermore, a double-hole hanging plate is welded to the top of the gravity cylinder.

[0014] Furthermore, a wall brush is detachably installed on the annular gravity ring, and the wall brush is arranged around the circumference of the annular gravity ring.

[0015] Furthermore, the wall brush includes a fixing ring, which is arranged in a ring shape and is horizontally arranged along the radial direction of the annular gravity ring. The fixing ring is provided with a plurality of flexible bristles, which are arranged at intervals around the circumference of the fixing ring. A stiffening plate is protruding from the fixing ring, and the fixing ring and the annular gravity ring are connected by the stiffening plate.

[0016] Compared with existing technologies, the stepped reverse circulation impact hammer provided by this utility model is suitable for drilling ultra-deep bridge piles on water platforms. The reverse circulation impact hammer is driven by a drilling rig to drill in the pile hole with a steel casing. The reverse circulation impact hammer drills into the rock or strata in the pile hole through multiple annular gravity rings. The annular gravity rings use multiple hammer teeth to drill in a stepped manner for multi-level cutting of the strata, improving the counterweight of the impact hammer, increasing the impact force, and increasing the drilling efficiency. Furthermore, an air-lift reverse circulation structure is used to remove slag through a slag discharge pipe in the cavity to improve drilling efficiency. This solves the problem of low drilling efficiency in the drilling process of ultra-deep bridge piles. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a stepped reverse circulation impact hammer suitable for drilling ultra-deep bridge piles on a floating platform, provided by this utility model.

[0018] Figure 2This is a top view of the stepped reverse circulation impact hammer, which is suitable for drilling ultra-deep bridge piles on a water platform, provided by this utility model.

[0019] Figure 3 This is a three-dimensional schematic diagram of the connection between the reverse circulation impact hammer and the wall brush provided by this utility model;

[0020] Figure 4 This is a partial three-dimensional schematic diagram of the wall brush provided by this utility model.

[0021] In the diagram: Gravity cylinder 10, triangular gravity plate 20, annular gravity ring 30, retrieval ring 40, wall brush 50, fixed impact tooth 11, double-hole hanging plate 12, hollow cavity 13, hanging plate 21, hammer tooth 31, connecting strip 32, hollow area 33, fixing ring 51, brush body 52, stiffening plate 53. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Reference Figure 1-4 The image shown is a preferred embodiment of the present invention.

[0026] A stepped reverse circulation impact hammer suitable for drilling ultra-deep bridge piles on water platforms includes a gravity cylinder 10. The gravity cylinder 10 has a hollow cavity 13 through which a slag discharge pipe passes and runs vertically through the cylinder. The hollow cavity 13 runs vertically through the gravity cylinder 10. Multiple annular gravity rings 30 are formed at the lower part of the gravity cylinder 10. The diameters of the multiple annular gravity rings 30 decrease from large to small. They are arranged in a stepped manner from top to bottom along the gravity cylinder 10. The multiple annular gravity rings 30 are arranged sequentially at intervals and nested sequentially at intervals. Multiple hammer teeth 31 are provided at the bottom of the annular gravity rings 30.

[0027] The aforementioned stepped reverse circulation impact hammer, suitable for drilling ultra-deep bridge piles on water platforms, is driven by a drilling rig to drill in pile holes with steel casings. The reverse circulation impact hammer drills into the rock or strata in the pile hole through multiple annular gravity rings 30. The annular gravity rings 30 use multiple hammer teeth 31 to drill in a stepped manner, which is used for multi-level cutting of strata, improving the counterweight of the impact hammer, increasing the impact force, and increasing the drilling efficiency. It also adopts an air-lift reverse circulation structure to remove slag through a slag discharge pipe in the cavity, so as to improve the drilling efficiency and solve the problem of low drilling efficiency in the drilling process of ultra-deep bridge piles.

[0028] A slag discharge pipe is connected to the gravity cylinder 10. The slag discharge pipe passes through the hollow cavity 13. The bottom of the slag discharge pipe has a slag discharge inlet, and the top of the slag discharge pipe has a slag discharge outlet. A vent pipe is installed in the slag discharge pipe. The outer end of the vent pipe extends to the outside of the slag discharge pipe and is connected to the air compressor. The inner end of the vent pipe is placed in the slag discharge pipe and has an air outlet.

[0029] During the impact drilling process of the impact hammer in the steel casing, the air compressor injects high-pressure gas into the pile hole through the air pipe. The high-pressure gas impacts the bottom of the pile hole, and the mud in the pile hole carries the slag and is discharged from the pile hole from bottom to top through the slag discharge pipe.

[0030] In this embodiment, a through-hole area 33 is formed between adjacent annular gravity rings 30. This facilitates the reduction of obstruction to the impact hammer by rock fragments through the through-hole area 33, thereby increasing the drilling efficiency of the impact hammer.

[0031] In this embodiment, multiple connecting strips 32 are provided between adjacent annular gravity rings 30. The connecting strips 32 are arranged at an angle, and the two ends of the connecting strips 32 are respectively connected to two adjacent annular gravity rings 30. The multiple connecting strips 32 are arranged around the annular gravity rings 30 at intervals in the circumference, and a hollow area 33 is formed between adjacent connecting strips 32.

[0032] The design of the inclined connecting strip 32 and the hollow area 33 enhances the stability and slag discharge capacity of the impact hammer; the connecting strip 32 can also enhance the connection between adjacent annular gravity rings 30.

[0033] In this embodiment, a plurality of triangular gravity plates 20 are provided on the outer periphery of the gravity cylinder 10. The plurality of triangular gravity plates 20 are arranged vertically around the outer periphery of the gravity cylinder 10 at intervals. The annular gravity ring 30 is connected to the gravity cylinder 10 through the triangular gravity plates 20. The plurality of annular gravity rings 30 are fixedly connected along the direction from the middle part of the triangular gravity plate 20 to the bottom of the triangular gravity plate 20.

[0034] The triangular gravity plate 20 increases the counterweight of the gravity cylinder 10, thereby increasing the impact force of the impact hammer. The triangular gravity plate 20 can also be used to connect and fix multiple annular gravity rings 30.

[0035] In this embodiment, a hanging plate 21 is provided on the triangular gravity plate 20, and multiple hanging plates 21 are connected through a retrieval ring 40. The retrieval ring 40 is arranged around the circumference of the gravity cylinder 10, and the retrieval ring 40 is spaced apart from the outer wall of the gravity cylinder 10.

[0036] The hanging plate 21 is used to guide the retrieval ring 40, which facilitates retrieval when the impact hammer falls; the retrieval ring 40 can be made by winding multiple steel wire ropes together.

[0037] In this embodiment, the retrieval ring 40 is located above the annular gravity ring 30, and the retrieval ring 40 and the annular gravity ring 30 are arranged vertically. This facilitates retrieval when the impact hammer falls and prevents the annular gravity ring 30 from obstructing the retrieval process.

[0038] In this embodiment, a plurality of fixed impact teeth 11 are welded to the bottom of the gravity cylinder 10, and the plurality of fixed impact teeth 11 are arranged at intervals around the bottom of the gravity cylinder 10. In this way, the gravity cylinder 10 can be driven into the pile hole with steel casing by the plurality of fixed impact teeth 11, thereby increasing the counterweight of the impact hammer, increasing the impact force, and increasing the drilling efficiency.

[0039] In this embodiment, a double-hole hanging plate 12 is welded to the top of the gravity cylinder 10.

[0040] The double-hole lifting plate 12 is used to connect two steel wire ropes on the winch of the drilling rig. The two steel wire ropes synchronously pull the reverse circulation impact hammer, so that the reverse circulation impact hammer always maintains balance during the drilling process. In this way, the impact hammer can achieve the synergistic effect of circumferential directional impact, active multi-directional impact and radial directional impact during the drilling process. This not only improves the drilling speed, but also ensures the verticality and overall quality of the pile hole, thereby achieving efficient and precise drilling operations under complex geological conditions.

[0041] In this embodiment, after drilling, a wall brush 50 is installed on the annular gravity ring 30, and the wall brush 50 is arranged around the circumference of the annular gravity ring 30.

[0042] The reverse circulation impact hammer is operated by the drilling rig moving up and down. The reverse circulation impact hammer uses the wall brush 50 to clean the inner wall of the steel casing, removing the mud attached to the inner wall of the steel casing, so that the steel casing can be recycled later.

[0043] In this embodiment, the wall brush 50 includes a fixing ring 51, which is arranged in a ring shape and is horizontally arranged along the radial direction of the annular gravity ring 30. The fixing ring 51 is provided with a plurality of flexible bristle bodies 52, which are arranged around the fixing ring 51 at intervals in the circumference. A stiffening plate 53 is protruding on the fixing ring 51, and the fixing ring 51 and the annular gravity ring 30 are connected by the stiffening plate 53.

[0044] The fixing ring 51 can be welded and fixed to the first annular gravity ring 30 on the upper part of the gravity cylinder 10 by the stiffening plate 53. The fixing ring 51 uses multiple flexible brushes 52 to brush away the mud attached to the inner wall of the steel casing. The brushes 52 can be made from the end of a steel wire rope, which not only has suitable rigidity to brush away the mud, but also has a certain degree of elastic deformation.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stepped reverse circulation percussion hammer suitable for drilling into piles of super deep bridges on water platforms, characterized in that, The device includes a gravity cylinder with a hollow cavity through which a slag discharge pipe passes and extends vertically. The hollow cavity extends vertically through the gravity cylinder. Multiple annular gravity rings are formed at the lower part of the gravity cylinder. The diameters of the multiple annular gravity rings decrease from large to small and are arranged in a stepped manner from top to bottom along the gravity cylinder. The multiple annular gravity rings are arranged sequentially at intervals and nested sequentially at intervals. Multiple hammer teeth are provided at the bottom of the annular gravity rings.

2. The stepped reverse circulation percussion hammer suitable for drilling into ultra-deep bridge piles from a platform over water as claimed in claim 1, wherein, A hollow area running vertically through the adjacent annular gravity rings is formed between them.

3. The stepped reverse circulation percussion hammer suitable for drilling into ultra-deep bridge piles from a platform over water as claimed in claim 2, wherein, Multiple connecting strips are arranged between adjacent annular gravity rings. The connecting strips are arranged at an angle, and each end of the connecting strip is connected to two adjacent annular gravity rings respectively. The multiple connecting strips are arranged around the annular gravity rings at intervals along the circumference, and the hollow area is formed between adjacent connecting strips.

4. The stepped reverse circulation impact hammer for drilling ultra-deep bridge piles on water platforms as described in claim 1, characterized in that, Multiple triangular gravity plates are provided on the outer periphery of the gravity cylinder. The multiple triangular gravity plates are arranged vertically around the outer periphery of the gravity cylinder at intervals. The annular gravity rings are connected to the gravity cylinder through the triangular gravity plates. The multiple annular gravity rings are fixedly connected along the direction from the middle of the triangular gravity plates to the bottom of the triangular gravity plates.

5. The stepped reverse circulation percussion hammer suitable for drilling into super deep bridge piles from a platform over water as claimed in claim 4 wherein, The triangular gravity plate is equipped with a hanging plate, and multiple hanging plates are connected by a retrieval ring. The retrieval ring is arranged around the circumference of the gravity cylinder, and the retrieval ring is spaced apart from the outer wall of the gravity cylinder.

6. The stepped reverse circulation percussion hammer suitable for drilling into super deep bridge piles from a platform over water as claimed in claim 5 wherein, The salvage ring is located above the annular gravity ring, and the salvage ring and the annular gravity ring are arranged vertically.

7. The stepped reverse circulation percussion hammer suitable for drilling into super deep bridge piles from a platform over water as claimed in claim 1, wherein, The bottom of the gravity cylinder is welded with a plurality of fixed impact teeth, which are arranged at intervals around the bottom of the gravity cylinder in a circumferential manner.

8. The stepped reverse circulation percussion hammer suitable for drilling into ultra-deep bridge piles from a platform over water as claimed in claim 1, wherein, The top of the gravity cylinder is welded with a double-hole hanging plate.

9. The stepped reverse circulation percussion hammer suitable for drilling into super deep bridge piles from a platform over water according to any one of claims 1 to 8, wherein, A wall brush is detachably mounted on the annular gravity ring, and the wall brush is arranged around the circumference of the annular gravity ring.

10. The stepped reverse circulation percussion hammer suitable for drilling into ultra-deep bridge piles from a platform over water as claimed in claim 9, wherein, The wall brush includes a fixing ring arranged in a ring shape and horizontally arranged along the radial direction of the annular gravity ring. The fixing ring is provided with a plurality of flexible bristles, which are arranged at intervals around the circumference of the fixing ring. A stiffening plate is protruding from the fixing ring, and the fixing ring and the annular gravity ring are connected by the stiffening plate.

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