Excavating drill bit for foundation pit reverse construction method

Abstract

The utility model relates to the technical field of adjusting mechanisms, and provides an excavating drill bit for foundation pit reverse construction, which comprises an excavating drill bit, a fixing mechanism sleeved on the excavating drill bit and a drill rod arranged at the top of the excavating drill bit, and the excavating drill bit is composed of an upper connecting mechanism and a lower excavating mechanism. The lower excavating mechanism and the upper connecting mechanism are integrally formed, the upper connecting mechanism comprises a conical rod and an external thread groove, and the lower excavating mechanism comprises a drill body, an L-shaped cutting board, an L-shaped inserting groove, a clamping groove, an inserting hole, an inserting rod, a tooth hole, drill teeth, an inner groove and a clamping block. An internal thread cylinder is rotated manually by using a tool, so that the internal thread cylinder is screwed off from an arc-shaped external thread plate, an L-shaped slot and an L-shaped chopping board are loosened, an inserting rod and an inserting hole are loosened, the L-shaped chopping board is pressed downwards after loosening, a linkage clamping block slides in a clamping groove, the L-shaped chopping board slides out of the L-shaped slot, and the L-shaped chopping board is effectively detached and replaced; and the cost is effectively saved, so that the use efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bits, and in particular relates to an excavation drill bit used for reverse construction of foundation pits. Background Art

[0002] In recent years, with the continuous improvement and enhancement of PDC (polycrystalline diamond composite) technology, the scope of use of PDC drill bits has gradually expanded from only soft formations and medium-hard formations to hard formations, complex formations containing interlayers and gravel. In the near future, the scope of application of PDC drill bits will be further expanded to more fields.

[0003] Known China Public Authorized Utility Model: (Publication No.: CN214118089U) discloses a new type of PDC drill bit, including a PDC drill bit crown and a polycrystalline diamond composite sheet arranged on the crown for cutting rocks, wherein the polycrystalline diamond composite sheet is welded in the composite sheet groove of the PDC drill bit crown, and a cemented carbide block is arranged at the blade gauge protection part of the PDC drill bit crown. Since the new type of PDC drill bit adopts a large piece of cemented carbide block as the gauge protection tooth, the friction between the gauge protection part and the well wall can be significantly reduced, and the drill bit torque can be reduced, which has a certain auxiliary effect on the smooth drilling of the PDC drill bit and the reduction of the phenomenon of chipped and broken teeth.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned new type of PDC drill bit has the following problems: in the use of the prior art, it is not convenient to disassemble and replace the L-shaped anvil plate, which causes the drill bit to be worn and damaged and directly discarded, which is relatively wasteful. If it continues to be used, it will lead to poor efficiency. Therefore, an excavation drill bit for reverse construction of foundation pit is proposed. Utility Model Content

[0005] The utility model provides an excavation drill bit for foundation pit reverse construction, which solves the problem in the related art that it is inconvenient to disassemble and replace the L-shaped anvil, resulting in the drill bit being worn and damaged and directly discarded, which is quite wasteful, and leads to poor efficiency if it is continued to be used.

[0006] The technical solution of the utility model is as follows: an excavation drill bit for foundation pit reverse construction, comprising: an excavation drill bit, a fixing mechanism sleeved on the excavation drill bit and a drill rod arranged on the top of the excavation drill bit;

[0007] The excavation drill bit is composed of an upper connecting mechanism and a lower excavation mechanism, and the lower excavation mechanism and the upper connecting mechanism are formed in one piece;

[0008] The upper connecting mechanism includes a tapered rod and an external thread groove;

[0009] The lower excavation mechanism comprises a drill body, an L-shaped anvil, an L-shaped slot, a card slot, a plug hole, an insertion rod, a tooth hole, a drill tooth, an inner groove and a card block;

[0010] The fixing mechanism comprises an internal threaded cylinder, a sealing ring and an arc-shaped external threaded plate.

[0011] Preferably, the tapered rod and the drill body are integrally formed, the external thread groove starts at the outer side wall of the tapered rod, and the bottom end of the drill rod is fixedly connected to the top end of the tapered rod via the external thread groove.

[0012] Preferably, the inner groove is formed at a corner of one side of the L-shaped anvil, the tooth hole is formed at the other side of the L-shaped anvil, and the drill teeth are embedded in the interior of the L-shaped anvil.

[0013] Preferably, the card block is fixedly mounted on both sides of the L-shaped chopping board, the two sides of the L-shaped chopping board are embedded and connected with the L-shaped slot, the card block is slidably connected with the slot, and the slot is opened on both sides inside the L-shaped slot.

[0014] Preferably, the insertion rod is fixedly mounted on the cross section of the L-shaped chopping board, the insertion rod is plugged into the insertion hole, and the insertion hole is provided on the cross section of the L-shaped slot of the dormitory.

[0015] Preferably, the internal threaded barrel and the sealing ring are jointly sleeved on the outer wall of the drill body, the sealing ring is located below the internal threaded barrel, the arc-shaped external threaded plate is fixedly mounted on the top of the L-shaped anvil of the L-shaped anvil, and the arc-shaped external threaded plate is threadedly connected to the internal threaded barrel.

[0016] The working principle and beneficial effects of the utility model are:

[0017] By manually using a tool to rotate the internal threaded barrel, the internal threaded barrel is unscrewed from the arc-shaped external threaded plate, thereby loosening the L-shaped slot and the L-shaped anvil, as well as the insertion rod and the insertion hole. After loosening, the L-shaped anvil is pressed downward, and the linkage card block slides inside the card slot, so that the L-shaped anvil slides out from the L-shaped slot, thereby effectively disassembling and replacing the L-shaped anvil, effectively saving costs, thereby improving usage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the explosion three-dimensional structure proposed by the utility model;

[0021] Figure 3 This is a partial three-dimensional structural diagram of an L-shaped cutting board proposed by the utility model;

[0022] Figure 4 This is a partial three-dimensional structural diagram of the internal threaded barrel proposed by the utility model;

[0023] In the figure: 1. excavation drill bit; 2. fixing mechanism; 3. drill rod; 101. upper connecting mechanism; 102. lower excavation mechanism; 1011. tapered rod; 1012. external thread groove; 1021. drill body; 1022. L-shaped anvil block; 1023. L-shaped slot; 1024. card slot; 1025. plug hole; 1026. plug rod; 1027. tooth hole; 1028. drill tooth; 1029. inner groove; 1020. card block; 21. internal thread barrel; 22. sealing ring; 23. arc-shaped external thread plate. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 - Figure 4 , an excavation drill bit for foundation pit reverse construction, comprising: an excavation drill bit 1, a fixing mechanism 2 sleeved on the excavation drill bit 1 and a drill rod 3 arranged on the top of the excavation drill bit 1;

[0026] The excavation drill bit 1 is composed of an upper connecting mechanism 101 and a lower excavation mechanism 102, and the lower excavation mechanism 102 and the upper connecting mechanism 101 are formed in one piece;

[0027] The upper connecting mechanism 101 includes a tapered rod 1011 and an external thread groove 1012;

[0028] The lower excavation mechanism 102 includes a drill body 1021, an L-shaped anvil 1022, an L-shaped slot 1023, a clamping slot 1024, a plug hole 1025, an insert rod 1026, a tooth hole 1027, a drill tooth 1028, an inner groove 1029 and a clamping block 1020;

[0029] The fixing mechanism 2 includes an internal threaded cylinder 21, a sealing ring 22 and an arc-shaped external threaded plate 23;

[0030] Preferably, the tapered rod 1011 and the drill body 1021 are integrally formed, the external thread groove 1012 starts at the outer wall of the tapered rod 1011, the bottom end of the drill rod 3 is fixedly connected to the top end of the tapered rod 1011 through the external thread groove 1012, the inner groove 1029 is provided at the corner of one side of the L-shaped anvil 1022, the tooth hole 1027 is provided on the other side of the L-shaped anvil 1022, the drill tooth 1028 is embedded in the inside of the L-shaped anvil 1022, the clamping block 1020 is fixedly installed on both sides of the L-shaped anvil 1022, the two sides of the L-shaped anvil 1022 are embedded and connected with the L-shaped slot 1023, and the clamping block 1020 is fixedly installed on both sides of the L-shaped anvil 1022. The inner threaded barrel 21 and the sealing ring 22 are sleeved together on the outer wall of the drill body 1021, and the sealing ring 22 is located below the inner threaded barrel 21; the sealing ring 22 is used to prevent the inner threaded barrel 21 and the arc-shaped outer threaded plate 23 from slipping after being connected, thereby improving the stability between the two;

[0031] The arc-shaped external thread plate 23 is fixedly mounted on the top of the L-shaped anvil plate 1022 , and the arc-shaped external thread plate 23 and the internal thread tube 21 are threadedly connected to the clamping block 1020 .

[0032] The utility model provides an excavation drill bit for reverse construction of foundation pits. The internal threaded barrel 21 is manually rotated using a tool to unscrew the internal threaded barrel 21 from the arc-shaped external threaded plate 23, thereby loosening the L-shaped slot 1023 and the L-shaped anvil 1022, as well as the insertion rod 1026 and the insertion hole 1025. After loosening, the L-shaped anvil 1022 is pressed downward, and the linkage block 1020 slides inside the slot 1024, so that the L-shaped anvil 1022 slides out from the L-shaped slot 1023, thereby effectively disassembling and replacing the L-shaped anvil 1022, effectively saving costs, thereby improving usage efficiency, and installation only requires reverse operation.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An excavation drill bit for reverse construction of foundation pit, characterized in that: include: An excavation drill bit (1), a fixing mechanism (2) sleeved on the excavation drill bit (1), and a drill rod (3) arranged on the top of the excavation drill bit (1); The excavation drill bit (1) is composed of an upper connecting mechanism (101) and a lower excavation mechanism (102), and the lower excavation mechanism (102) and the upper connecting mechanism (101) are integrally formed; The upper connection mechanism (101) comprises a tapered rod (1011) and an external thread groove (1012); The lower excavation mechanism (102) comprises a drill body (1021), an L-shaped anvil (1022), an L-shaped slot (1023), a clamping slot (1024), an insertion hole (1025), an insertion rod (1026), a tooth hole (1027), a drill tooth (1028), an inner groove (1029) and a clamping block (1020); The fixing mechanism (2) comprises an internal threaded cylinder (21), a sealing ring (22) and an arc-shaped external threaded plate (23).

2. The excavation drill bit for foundation pit reverse construction according to claim 1, characterized in that: The tapered rod (1011) and the drill body (1021) are integrally formed, the external thread groove (1012) starts at the outer side wall of the tapered rod (1011), and the bottom end of the drill rod (3) is fixedly connected to the top end of the tapered rod (1011) via the external thread groove (1012).

3. The excavation drill bit for foundation pit reverse construction according to claim 2, characterized in that: The inner groove (1029) is provided at a corner of one side of the L-shaped anvil (1022), the tooth hole (1027) is provided on the other side of the L-shaped anvil (1022), and the drill tooth (1028) is embedded in the interior of the L-shaped anvil (1022).

4. The excavation drill bit for foundation pit reverse construction according to claim 3, characterized in that: The clamping block (1020) is fixedly mounted on both sides of the L-shaped chopping board (1022), the two sides of the L-shaped chopping board (1022) are embedded and clamped with the L-shaped slot (1023), the clamping block (1020) is slidably clamped with the slot (1024), and the slot (1024) is opened on both sides inside the L-shaped slot (1023).

5. The excavation drill bit for foundation pit reverse construction according to claim 4, characterized in that: The insertion rod (1026) is fixedly mounted on the cross section of the L-shaped chopping board (1022), the insertion rod (1026) is plugged into the insertion hole (1025), and the insertion hole (1025) is provided on the cross section of the dormitory L-shaped slot (1023).

6. The excavation drill bit for foundation pit reverse construction according to claim 1, characterized in that: The internal threaded barrel (21) and the sealing ring (22) are jointly sleeved on the outer wall of the drill body (1021), the sealing ring (22) is located below the internal threaded barrel (21), the arc-shaped external threaded plate (23) is fixedly mounted on the top of the L-shaped anvil plate (1022), and the arc-shaped external threaded plate (23) is threadedly connected to the internal threaded barrel (21).

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