Device for preventing spoil from sliding off during long spiral drilling

Abstract

The utility model discloses a long auger drilling spoil slip prevention device which comprises a connecting plate, one end of the connecting plate is connected with a drilling machine rack through a fastener, the other end of the connecting plate is fixedly connected with a hoop protection cylinder, the hoop protection cylinder is connected to the periphery of a drilling machine auger stem in a sleeved mode, and an auger tool is arranged on the periphery of the auger stem. The hoop protection cylinder comprises a detachable protection cylinder, the detachable protection cylinder is of a frustum structure with the upper portion narrow and the lower portion wide and the two ends penetrating through, the periphery of the spiral drilling tool is sleeved with the detachable protection cylinder, and the outer side wall of the detachable protection cylinder is fixedly connected with the connecting plate. According to the device for preventing spoil from sliding off in the long spiral drilling process, the detachable pile casing is arranged in the mode that the upper portion is narrow and the lower portion is wide, and the bottom plate is arranged at one end of the detachable pile casing, so that sandy soil is better conveyed out from an upper end opening of the detachable pile casing, spoil is prevented from falling into a drill hole in the drilling process, and operation efficiency is improved; the wing plates are connected in a bolt mode, thereby being convenient to disassemble and clean and suitable for desert areas.

Description

Technical Field

[0001] The utility model belongs to the technical field of long spiral drilling rig drilling, and in particular relates to a device for preventing abandoned soil from sliding off a long spiral drilling hole. Background Art

[0002] During the piling construction process in the desert area, it was found that the long spiral drill was prone to hole collapse when lifting the drill, which in turn affected the quality of the pile and the construction progress. Analysis showed that the collapse was caused by the poor cohesion of the sand layer and the failure to take wall protection measures in the drilling process. Utility Model Content

[0003] The utility model aims to provide a device for preventing abandoned soil from sliding off in long spiral drilling holes, which solves the problem in the prior art that the long spiral drill is prone to hole collapse when the drill is lifted, thereby affecting the pile quality and construction progress.

[0004] The technical solution adopted by the utility model is to include a connecting plate, one end of which is connected to a drilling rig frame through a fastener, and the other end of the connecting plate is fixedly connected with a clamping sleeve, the clamping sleeve is sleeved on the outer periphery of the drilling rig spiral drill rod, and the outer periphery of the spiral drill rod is provided with a spiral drill cutter;

[0005] The hoop casing includes a detachable casing, which is in the form of a conical structure that is narrow at the top and wide at the bottom and penetrates at both ends. The detachable casing is sleeved on the outer periphery of the spiral drill cutter, and the outer side wall of the detachable casing is fixedly connected to the connecting plate.

[0006] The utility model is also characterized in that:

[0007] The diameter of the upper circle of the removable casing cone is smaller than the diameter of the lower circle of the removable casing cone.

[0008] The detachable casing includes two fan-shaped guard plates, both straight ends of which are vertically fixed with wing plates. The two wing plates located at different ends of the fan-shaped guard plates are connected by wing plate bolts to form a frustum structure that is narrow at the top and wide at the bottom and penetrates at both ends; the inner periphery of the bottom of each fan-shaped guard plate is fixed with a bottom plate.

[0009] The bottom plate adopts a semi-circular bottom plate, the upper diameter of the detachable casing cone is larger than the inner diameter of the semi-circular bottom plate, and the inner diameter of the semi-circular bottom plate is larger than the drilling diameter of the spiral drill.

[0010] A plurality of pairs of bolt holes are provided on the wing plate.

[0011] A sealing ring is sleeved on the outer periphery of the upper end of the detachable casing.

[0012] The sealing ring adopts a U-shaped sealing ring, and the U-shaped groove of the U-shaped sealing ring is clamped with the outer periphery of the upper end of the detachable casing.

[0013] The fasteners are bolts and nuts, and a plurality of bolt holes are provided on the connecting plate.

[0014] The beneficial effects of the utility model are:

[0015] 1) The long spiral drilling anti-abandoned soil sliding device of the utility model, during the drilling process, the sand and soil brought out by the spiral drill cutter will fall on the bottom plate of the detachable casing, and when the detachable casing is full of sand and soil, the sand and soil will fall out of the borehole from the upper port of the detachable casing, which not only prevents the abandoned soil from falling into the borehole during drilling, so that the spiral drill rod maintains a good drilling ability, but also avoids multiple cleaning of the detachable casing, which is conducive to improving the on-site drilling quality and construction progress, effectively ensuring the safety of on-site construction, and is suitable for desert areas;

[0016] 2) By setting the removable casing to be narrow at the top and wide at the bottom, it is difficult for sand and soil to slide down the inner wall of the casing to the bottom plate repeatedly, and it is better to be transported out from the upper port of the removable casing. In addition, a large amount of waste soil is discharged to the outside of the borehole along the outer wall of the casing without splashing everywhere, thereby greatly improving the working efficiency;

[0017] 3) By setting the length between the connecting plate and the frame to be adjustable, it is convenient to adapt to long spiral drilling rigs of different specifications, thereby improving the applicability of the hoop casing;

[0018] 4) The wing plates of the detachable casing are connected by bolts, which is convenient for cleaning the sand accumulated in the casing to ensure better use of the auger rod;

[0019] 5) By flexibly connecting the U-shaped sealing ring to the upper end of the casing, collision between the auger rod and the hoop casing can be prevented, thereby protecting the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation structure of the long spiral drilling device for preventing abandoned soil from sliding off;

[0021] Figure 2 It is a structural schematic diagram of a detachable casing in a long spiral drilling device for preventing abandoned soil from sliding off;

[0022] Figure 3 It is a side view of the long spiral drilling device for preventing abandoned soil from sliding off of the utility model;

[0023] Figure 4 It is a top view of a device for preventing abandoned soil from sliding off a long spiral drilling hole according to the utility model.

[0024] In the figure, 1. clamp casing, 11. detachable casing; 111. wing plate, 12. bottom plate, 13. wing plate bolts, 2. connecting plate, 21. fastener, 3. sealing ring, 4. auger rod, 41. auger cutter, 5. drilling rig frame. DETAILED DESCRIPTION

[0025] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0026] Example 1

[0027] The utility model discloses a long spiral drilling device for preventing abandoned soil from sliding off, the structure of which is as follows: Figure 1 As shown, it comprises a hoop casing 1, a connecting plate 2 and a sealing ring 3. The outer periphery of the auger rod 4 is provided with an auger cutter 41, and the hoop casing 1 is sleeved on the outer periphery of the auger cutter 41.

[0028] like Figure 1 and Figure 2 As shown, the hoop casing 1 includes a detachable casing 11, which includes two fan-shaped guard plates, and the two straight ends of the fan-shaped guard plates are vertically fixed with wing plates 111. The wing plates 111 are provided with two pairs of bolt holes. The wing plate bolts 13 are inserted into the bolt holes to bolt the two wing plates 111 located on different fan-shaped guard plates to form a frustum structure that is narrow at the top and wide at the bottom and through at both ends. The diameter of the upper circle of the frustum of the detachable casing 11 is smaller than the diameter of the lower circle of the frustum of the detachable casing 11, so that the hoop casing 1 can be split in half, and there is a gap between the inner wall of the detachable casing 11 and the auger 4. The detachable casing 11 is sleeved on the outer periphery of the auger 4 of the drilling rig to prevent the waste soil from falling into the borehole.

[0029] The detachable casing 11 has a cone-shaped structure as a whole, which is narrow at the top and wide at the bottom, and is penetrated at both ends, so that sand and soil are not easy to slide down the inner wall of the detachable casing 11 to the bottom plate 12 repeatedly, and are better transported out from the upper port of the detachable casing 11. A large amount of waste soil is also discharged to the outside of the borehole along the outer wall of the detachable casing 11 without splashing everywhere, thereby greatly improving the working efficiency.

[0030] A bottom plate 12 is welded to the inner side of the bottom of each sector-shaped guard plate, and there is a gap between the inner side of the bottom plate 12 and the spiral drill cutter 41, so that the spiral drill cutter 41 can be lifted smoothly. Figure 2 and Figure 3 As shown, the diameter of the upper circle of the frustum of the detachable casing 11 is between the diameter of the lower circle of the frustum and the inner diameter of the bottom plate 12 .

[0031] The detachable casing 11 is detachably connected to the frame 5 of the drilling rig through the connecting plate 2. The connecting plate 2 is detachably arranged on one side of the outer wall of the detachable casing 11 and is located between the two wing plates 111. The connecting plate 2 is locked and connected to the frame 5 of the drilling rig through fasteners. The fasteners are common bolts and nuts. A plurality of bolt holes are provided on the connecting plate 2. The distance between the detachable casing 11 and the frame 5 can be adjusted and set through the connecting plate 2, which is convenient for adapting to long spiral drilling rigs of different specifications and improves the applicability of the clamp casing 1.

[0032] The wing plate 111 of the detachable casing 11 is connected by bolts. When the waste soil in the detachable casing 11 needs to be cleaned during the drilling process, the free end of the hoop casing 1 is removed to quickly complete the cleaning. When the drilling work is completed and the hoop casing 1 needs to be cleaned, the hoop casing 1 is removed from the drilling rig frame 5 for cleaning.

[0033] Example 2

[0034] On the basis of Example 1, Figure 2 As shown, the bottom plate 12 is a semi-circular bottom plate, the upper diameter of the cone of the detachable casing 11 is larger than the inner diameter of the semi-circular bottom plate, and the inner diameter of the semi-circular bottom plate is larger than the drilling diameter of the spiral drill 41.

[0035] When the auger rod 4 is drilling, the sand and soil brought out by the auger cutter 41 will fall onto the bottom plate 12. When the removable casing 11 is full of sand and soil, the sand and soil will fall out of the borehole from the upper end of the removable casing 11. This not only prevents waste soil from falling into the borehole during drilling, allowing the auger rod 4 to maintain a good drilling ability, but also avoids multiple cleanings of the removable casing 11, which is beneficial to improving the on-site drilling quality and construction progress, and effectively ensuring on-site construction safety.

[0036] Example 3

[0037] On the basis of Example 2, the outer periphery of the upper end of the detachable casing 11 is flexibly connected to the sealing ring 3, and the sealing ring 3 is a U-shaped sealing ring, and the U-shaped groove of the U-shaped sealing ring is stuck in the edge of the upper end of the detachable casing 11. It can prevent the auger rod 4 and the hoop casing 1 from colliding, thereby protecting the equipment.

[0038] The long spiral drilling anti-abandoned soil sliding device of the utility model has the following working principle: during the drilling process of the spiral drill rod 4, the sand and soil brought out by the spiral drill cutter 41 will fall on the bottom plate 12. When the detachable casing 11 is full of sand and soil, the sand and soil will fall from the upper end of the detachable casing 11 to the outside of the borehole, thereby preventing the abandoned soil from falling into the borehole during drilling, and avoiding multiple cleanings of the detachable casing 11, thereby improving the on-site drilling quality and construction progress; when the abandoned soil in the detachable casing 11 needs to be cleaned during the drilling process, the wing plate bolts 13 on the wing plate 111 are unscrewed, so that the detachable casing 11 is split in half, and the cleaning can be completed quickly. When the drilling work is completed and the clamp casing 1 needs to be cleaned, the clamp casing 1 can be removed from the drilling rig frame 5 for cleaning.

[0039] The long spiral drilling device for preventing abandoned soil from sliding off has the following advantages: the detachable casing is arranged to be narrow at the top and wide at the bottom, and a bottom plate is arranged at one end of the detachable casing, so that sand and soil can be better transported out from the upper port of the detachable casing, and abandoned soil can be prevented from falling into the drill hole during drilling, thereby improving working efficiency; the wing plates are connected by bolts, which is convenient for disassembly and cleaning, and is suitable for desert areas.

Claims

1. Long spiral drilling device to prevent soil from sliding off, characterized in that: It comprises a connecting plate (2), one end of the connecting plate (2) is connected to a drilling rig frame (5) via a fastener, the other end of the connecting plate (2) is fixedly connected to a clamping sleeve (1), the clamping sleeve (1) is sleeved on the outer periphery of a drilling rig spiral drill rod (4), and the outer periphery of the spiral drill rod (4) is provided with a spiral drill cutter (41); The hoop casing (1) comprises a detachable casing (11), the detachable casing (11) is a cone-shaped structure which is narrow at the top and wide at the bottom and has two ends passing through, the detachable casing (11) is sleeved on the outer periphery of the spiral drill cutter (41), and the outer side wall of the detachable casing (11) is fixedly connected to the connecting plate (2); The diameter of the upper circle of the cone of the detachable casing (11) is smaller than the diameter of the lower circle of the cone of the detachable casing (11); the detachable casing (11) comprises two fan-shaped guard plates, both straight ends of which are vertically fixed with wing plates (111), and the two wing plates (111) located at different ends of the fan-shaped guard plates are connected by wing plate bolts (13) to form a cone body structure that is narrow at the top and wide at the bottom and penetrates at both ends; the inner circumference of the bottom of each fan-shaped guard plate is fixed with a bottom plate (12).

2. The device for preventing spoil from sliding off in long spiral drilling according to claim 1 is characterized in that: The bottom plate (12) is a semi-annular bottom plate, the upper diameter of the cone of the detachable casing (11) is larger than the inner diameter of the semi-annular bottom plate, and the inner diameter of the semi-annular bottom plate is larger than the drilling diameter of the spiral drill (41).

3. The device for preventing spoil from sliding off in long spiral drilling according to claim 1 is characterized in that: The wing plate (111) is provided with a plurality of pairs of bolt holes.

4. The device for preventing spoil from sliding off in long spiral drilling according to claim 1 is characterized in that: A sealing ring (3) is sleeved on the outer periphery of the upper end of the detachable casing (11).

5. The device for preventing spoil from sliding off in long spiral drilling according to claim 4 is characterized in that: The sealing ring (3) is a U-shaped sealing ring, and the U-shaped groove of the U-shaped sealing ring is clamped with the outer circumference of the upper end of the detachable casing (11).

6. The device for preventing spoil from sliding off in long spiral drilling according to claim 1, characterized in that: The fasteners are bolts and nuts, and the connecting plate (2) is provided with a plurality of bolt holes.

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