Drilling equipment for expanding construction of rotary excavating cast-in-place pile

Abstract

The invention relates to drilling equipment for diameter expansion construction of a rotary excavating cast-in-place pile, which comprises a drill rod, a drilling rod, a rotary excavating device and a rotary excavating device, wherein a drill bit is mounted at the bottom of the drill rod; the first connecting ring is fixedly arranged on the drill rod, and a first connecting rod is rotatably arranged at the end part of the first connecting ring; the fixing sleeve is fixedly arranged on the drill rod and located at the top of the first connecting ring, and a sliding groove is formed in the surface of the fixing sleeve; the second connecting ring can slide up and down along the sliding groove, a second connecting rod is rotatably arranged at the end of the second connecting ring, and a rotating shaft is arranged between the first connecting rod and the second connecting rod; the sliding groove is formed in the base, the shape-variable protruding blocks are arranged in the sliding groove, the protruding blocks are arranged at intervals along the height of the sliding groove, the structure is simple, and use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of construction, and particularly refers to a drilling device for the diameter-expanding construction of rotary drilled cast-in-place piles. Background Art

[0002] After the bored socketed pile reaches the required bearing stratum by drilling and then changes to a special drill bit at the pile end to expand the pile end diameter, the ultimate bearing capacity of the pile will increase significantly compared to that of the cast-in-place pile without an enlarged head. The bored socketed pile can finish the hole in the strongly weathered rock, which can make up for the deficiencies of other pile types and has remarkable economic benefits. By drilling into the ground through the drill pipe to obtain the required cast-in-place pile, and the diameter of the cast-in-place pile underground can be changed as needed;

[0003] However, the existing drill pipes for the diameter-expanding construction of cast-in-place piles have certain drawbacks. First, when the drill pipe drills the soil, the drill pipe is likely to encounter rocks or hard objects, and the unfolded connecting rod cannot be retracted, resulting in a collision between the connecting rod and the rock. The unfolded connecting rod will be subjected to a large load. When the loads on the connecting rod are different, the fixing sleeve on the connecting rod cannot move relatively, which will also cause damage to the components of the drill pipe and require the replacement of the entire drill pipe, which is rather troublesome. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a drilling device for the diameter-expanding construction of rotary drilled cast-in-place piles. When the connecting rod is subjected to a large load, the second connecting ring will be squeezed upward to break the convex block, so that the first connecting rod and the second connecting rod move away from the drill bit, making the first connecting rod and the second connecting rod fit against the rod body of the drill pipe to avoid damage to the first connecting rod and the second connecting rod.

[0005] The technical solution to achieve the above purpose is a drilling device for the diameter-expanding construction of rotary drilled cast-in-place piles, including:

[0006] A drill pipe, with a drill bit installed at the bottom of the drill pipe;

[0007] A first connecting ring fixedly arranged on the drill pipe, and a first connecting rod is rotatably arranged at the end of the first connecting ring;

[0008] A fixing sleeve fixedly arranged on the drill pipe and located above the first connecting ring, and a sliding groove is formed on the surface of the fixing sleeve;

[0009] A second connecting ring that can slide up and down along the sliding groove, and a second connecting rod is rotatably arranged at the end of the second connecting ring. A rotating shaft is arranged between the first connecting rod and the second connecting rod; and

[0010] A plurality of deformable bumps disposed in the sliding groove, and the bumps are arranged at intervals along the height of the sliding groove.

[0011] Further, a plurality of alloy blocks are provided on the surfaces of the first connecting rod and the second connecting rod.

[0012] Further, a fitting block is formed at the bottom of the bump, the size of the fitting block is smaller than the size of the bump, and a fitting groove is formed in the second connecting ring corresponding to the fitting block, and the size of the fitting block is adapted to the size of the fitting groove.

[0013] Further, a fixing ring is provided at the top of the fixing sleeve, and the diameter of the fixing ring is larger than the diameter of the fixing sleeve.

[0014] Further, a plurality of fitting strips are formed at the top of the second connecting ring, and fitting openings are formed at the bottom of the fixing ring corresponding to the fitting strips.

[0015] Further, an external thread is formed at the top of the fixing sleeve, an internal thread is formed on the inner wall of the fixing ring corresponding to the external thread, and the internal thread of the fixing ring is threadedly connected to the external thread of the fixing sleeve.

[0016] Further, a first connecting rotating shaft is provided at the end of the first connecting ring, and the first connecting rod is rotatably arranged on the first connecting rotating shaft.

[0017] Further, a second connecting rotating shaft is provided at the end of the second connecting ring, and the second connecting rod is rotatably arranged on the second connecting rotating shaft.

[0018] Further, there are two first connecting rods, and the two first connecting rods are oppositely arranged at opposite ends of the first connecting ring, and there are two second connecting rods corresponding to the two first connecting rods.

[0019] Further, the width of the second connecting ring is smaller than the distance between two adjacent bumps.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] When the connecting rod is subjected to a large load, the second connecting ring will be squeezed upward to break the bump, so that the first connecting rod and the second connecting rod move away from the drill bit, so that the first connecting rod and the second connecting rod are attached to the rod body of the drill pipe to avoid damage to the first connecting rod and the second connecting rod. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a drilling device for rotary drilling cast-in-place pile diameter expansion construction;

[0023] Figure 2 It is an effect diagram of the use of a drilling device for the diameter expansion construction of a rotary drilled cast-in-place pile;

[0024] Figure 3 It is a schematic structural diagram of the second connecting ring of a drilling device for the diameter expansion construction of a rotary drilled cast-in-place pile;

[0025] Figure 4 It is a schematic structural diagram of the limit ring of a drilling device for the diameter expansion construction of a rotary drilled cast-in-place pile;

[0026] Legend: 1. Drill pipe; 2. Second connecting rod; 3. First connecting ring; 4. Limit ring; 7. Second connecting ring; 8. First connecting rod; 501. Fixed sleeve; 502. Sliding groove; 503. Fitting block; 504. Convex block; 505. Fitting groove; 601. Fixed ring; 602. External thread; 603. Fitting strip; 604. Fitting port; 605. Internal thread. Specific implementation manners

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Refer to Figure 1 , a drilling device for the diameter expansion construction of a rotary drilled cast-in-place pile, comprising: a drill pipe 1, a drill bit is installed at the bottom of the drill pipe 1; a first connecting ring 3 fixedly arranged on the drill pipe 1, a first connecting rod 8 is rotatably arranged at the end of the first connecting ring 3; a fixed sleeve 501 fixedly arranged on the drill pipe 1 and located at the top of the first connecting ring 3, a sliding groove 502 is formed on the surface of the fixed sleeve 501; a second connecting ring 7 that can slide up and down along the sliding groove 502, a second connecting rod 2 is rotatably arranged at the end of the second connecting ring 7, a rotating shaft is arranged between the first connecting rod 8 and the second connecting rod 2; and a plurality of deformable convex blocks 504 arranged in the sliding groove 502, the convex blocks 504 are arranged at intervals along the height of the sliding groove 502.

[0029] In the present invention, a preferred embodiment is as follows: The drill pipe 1 is driven into the soil. When it is necessary to expand the diameter of the excavated hole, a first connecting ring 3 and a fixing sleeve 501 can be provided on the drill pipe 1. The distance between the first connecting ring 3 and the fixing sleeve 501 is adjusted so that the first connecting rod 8 and the second connecting rod 2 rotate and adjust in a direction away from or close to the drill pipe 1, so as to adjust the distance between the connection point of the first connecting rod 8 and the second connecting rod 2 and the drill pipe 1 to be adjustable, thereby adjusting the size of the expanded hole. When performing the expanded drilling, the first connecting rod 8 and the second connecting rod 2 dig towards the ground, and the second connecting rod 2 abuts against the second connecting ring 7, so that the second connecting ring 7 abuts against the convex block 504. When the first connecting rod 8 and the second connecting rod 2 encounter a hard object during the excavation process and the excavation cannot continue downward, the first connecting rod 8 and the second connecting rod 2 abut against the second connecting ring 7, so that the second connecting ring 7 continuously presses the convex block 504, resulting in the deformation and damage of the convex block 504, so that the second connecting ring 7 passes through the convex block 504, and the first connecting rod 8 and the second connecting rod 2 rotate towards the drill pipe 1, thereby reducing the expansion range until the first connecting rod 8 and the second connecting rod 2 are away from the hard object or all the convex blocks 504 arranged in the sliding groove 502 are damaged, and the first connecting rod 8 and the second connecting rod 2 are attached to the rod body of the drill pipe 1 to avoid damage to the drill pipe 1 due to the drill pipe 1 being subjected to a large load.

[0030] Furthermore, a limiting ring 4 is provided on the drill pipe 1. The limiting ring 4 is arranged above the fixing sleeve 501. A telescopic push rod is provided on the limiting ring 4. The telescopic push rod is driven by a motor, and the end of the telescopic push rod abuts against the second connecting ring 7 to make the second connecting ring 7 slide to a suitable position.

[0031] Furthermore, a number of alloy blocks are provided on the surfaces of the first connecting rod 8 and the second connecting rod 2. By providing alloy blocks on the surfaces of the first connecting rod 8 and the second connecting rod 2, the first connecting rod 8 and the second connecting rod 2 can dig the ground more conveniently and increase the hardness of the first connecting rod 8 and the second connecting rod 2.

[0032] Furthermore, a fitting block 503 is formed at the bottom of the convex block 504. The size of the fitting block 503 is smaller than the size of the convex block 504. The second connecting ring 7 is correspondingly formed with a fitting groove 505 for the fitting block 503. The size of the fitting block 503 is adapted to the size of the fitting groove 505. When the alloy block at the second connecting rod 2 bears a large load, the fitting groove 505 of the second connecting ring 7 contacts the fitting block 503 in sequence, so as to cut off the convex block 504 at the top of the fitting block 503, so that the second connecting rod 2 deforms and changes the unfolding amplitude to protect the drill pipe 1 from damage, and the load received by the drill pipe 1 is gradually reduced by the convex block 504.

[0033] Furthermore, the size of the bump 504 increases successively from bottom to top.

[0034] Furthermore, a fixing ring 601 is provided at the top of the fixing sleeve 501, and the diameter of the fixing ring 601 is greater than the diameter of the fixing sleeve 501.

[0035] Furthermore, a plurality of fitting strips 603 are formed at the top of the second connecting ring 7, and fitting ports 604 are formed at the bottom of the fixing ring 601 corresponding to the fitting strips 603. When the second connecting ring 7 is abutted against the top of the fixing sleeve 501, the fitting strips 603 are clamped in the fitting ports 604 at the bottom of the fixing ring 601 to limit the second connecting ring 7.

[0036] Furthermore, an external thread 602 is formed at the top of the fixing sleeve 501, an internal thread 605 is formed on the inner wall of the fixing ring 601 corresponding to the external thread 602, and the internal thread 605 of the fixing ring 601 is threadedly connected to the external thread 602 of the fixing sleeve 501.

[0037] Furthermore, a first connecting rotating shaft is provided at the end of the first connecting ring 3, and the first connecting rod 8 is rotatably arranged on the first connecting rotating shaft.

[0038] Furthermore, a second connecting rotating shaft is provided at the end of the second connecting ring 7, and the second connecting rod 2 is rotatably arranged on the second connecting rotating shaft.

[0039] Furthermore, there are two first connecting rods 8, and the two first connecting rods 8 are oppositely arranged at opposite ends of the first connecting ring 3, and there are two second connecting rods 2 corresponding to the two first connecting rods 8.

[0040] Furthermore, the width of the second connecting ring 7 is smaller than the distance between two adjacent bumps 504.

[0041] The following describes the use process of a drilling device for the diameter expansion construction of a rotary drilled cast-in-place pile according to the present invention.

[0042] The drill pipe 1 is driven into the soil body. When it is necessary to expand the diameter of the excavated hole, a first connecting ring 3 and a fixing sleeve 501 can be arranged on the drill pipe 1. The distance between the first connecting ring 3 and the fixing sleeve 501 is adjusted, so that the first connecting rod 8 and the second connecting rod 2 rotate and adjust in the direction away from or close to the drill pipe 1, so as to adjust the distance between the connection point of the first connecting rod 8 and the second connecting rod 2 and the drill pipe 1 to be adjustable, thereby adjusting the size of the expanded hole. When expanding the diameter of the hole, the first connecting rod 8 and the second connecting rod 2 dig towards the ground, and the second connecting rod 2 abuts against the second connecting ring 7, so that the second connecting ring 7 abuts against the convex block 504. When the first connecting rod 8 and the second connecting rod 2 encounter a hard object during the excavation process and the excavation cannot continue downward, the first connecting rod 8 and the second connecting rod 2 abut against the second connecting ring 7, so that the second connecting ring 7 continuously presses the convex block 504, resulting in the deformation and damage of the convex block 504, so that the second connecting ring 7 passes through the convex block 504. The first connecting rod 8 and the second connecting rod 2 rotate towards the drill pipe 1, thereby reducing the expansion range until the first connecting rod 8 and the second connecting rod 2 are away from the hard object or all the convex blocks 504 arranged in the sliding groove 502 are damaged, and the first connecting rod 8 and the second connecting rod 2 are attached to the rod body of the drill pipe 1, so as to avoid damage to the drill pipe 1 caused by the drill pipe 1 being subjected to a large load.

[0043] The present invention has been described in detail in combination with the embodiments with reference to the accompanying drawings. Those of ordinary skill in the art can make various variations to the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation to the present invention, and the protection scope of the present invention will be defined by the scope defined in the appended claims.

Claims

1. A drilling device for the construction of rotary bored pile expansion, characterized in that: include: A drill rod, a drill bit is installed at the bottom of the drill rod; A first connecting ring fixedly arranged on the drill pipe, wherein a first connecting rod is rotatably arranged at an end of the first connecting ring; A fixing sleeve fixedly arranged on the drill rod and located on the top of the first connecting ring, wherein a sliding groove is formed on the surface of the fixing sleeve; a second connecting ring that can slide up and down along the sliding groove, a second connecting rod being rotatably provided at an end of the second connecting ring, and a rotating shaft being provided between the first connecting rod and the second connecting rod; and A plurality of convex blocks with variable shapes are arranged in the sliding groove, and the convex blocks are arranged at intervals along the height of the sliding groove.

2. A drilling device for the expansion of rotary bored piles according to claim 1, characterized in that: A plurality of alloy blocks are arranged on the surfaces of the first connecting rod and the second connecting rod.

3. The drilling equipment for the construction of rotary bored pile expansion according to claim 1 is characterized by: A matching block is formed at the bottom of the protrusion, the size of the matching block is smaller than the size of the protrusion, and a matching groove is formed on the second connecting ring corresponding to the matching block, and the size of the matching block is matched with the size of the matching groove.

4. The drilling equipment for the expansion of rotary bored piles according to claim 1 is characterized by: A fixing ring is arranged on the top of the fixing sleeve, and the diameter of the fixing ring is larger than the diameter of the fixing sleeve.

5. The drilling equipment for the expansion of rotary bored piles according to claim 4 is characterized by: A plurality of matching strips are formed on the top of the second connecting ring, and a matching opening is formed on the bottom of the fixing ring corresponding to the matching strips.

6. The drilling equipment for the expansion of rotary bored piles according to claim 4 is characterized by: The top of the fixing sleeve is formed with an external thread, the inner wall of the fixing ring is formed with an internal thread corresponding to the external thread, and the internal thread of the fixing ring is threadedly connected to the external thread of the fixing sleeve.

7. The drilling equipment for the construction of rotary bored pile expansion according to claim 1 is characterized by: A first connecting shaft is disposed at the end of the first connecting ring, and the first connecting rod is rotatably disposed on the first connecting shaft.

8. The drilling equipment for the construction of rotary bored pile expansion according to claim 1 is characterized by: A second connecting shaft is disposed at the end of the second connecting ring, and the second connecting rod is rotatably disposed on the second connecting shaft.

9. The drilling equipment for the construction of rotary bored pile expansion according to claim 1, characterized in that: Two first connecting rods are provided, and the two first connecting rods are oppositely arranged at two opposite ends of the first connecting ring, and two second connecting rods are provided corresponding to the two first connecting rods.

10. The drilling equipment for the construction of rotary bored pile expansion according to claim 1, characterized in that: The width of the second connecting ring is smaller than the distance between two adjacent protrusions.

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