Anti-sloughing device for rotary drilling

Abstract

The utility model belongs to the field of rotary excavating drill bits, and relates to a hole collapse prevention device for rotary excavating hole forming, which can reduce the condition that sludge in a drilling bucket slides out and improve the working efficiency of a single-bottom drill bit. According to the technical scheme, a rotary excavating drill bit and baffles are included. The rotary excavating drill bit comprises a drilling bucket and a bottom plate, the drilling bucket is a barrel with an opening in the lower end, the bottom plate is a plate and hinged to the side wall of the drilling bucket, and when the bottom plate is closed to the lower end of the drilling bucket, a feeding gap exists between the bottom plate and the opening in the lower end of the drilling bucket. The baffle is hinged to the bottom plate, and when the baffle is parallel to the bottom plate, the baffle is located within the range of the feeding gap. And the baffle plate is fixed on the bottom plate, the baffle plate is arranged on the outer side of a space formed by the baffle plate and the drilling bucket, and the baffle plate is supported by the baffle plate, so that the baffle plate rotates in the drilling bucket.

Description

Technical Field

[0001] The utility model belongs to the field of rotary drilling bits and relates to a rotary drilling hole-forming and anti-collapse device. Background Art

[0002] With the promotion and application of rotary drilling rigs in my country in recent years, they have been increasingly recognized and applied by construction workers in pile foundation construction. Among them, rotary drilling rigs can be selected according to different situations in both wet and dry drilling of concrete bored piles. Rotary drilling rigs are generally suitable for clay, silt, sand, silty soil, artificial backfill soil and strata containing some pebbles and gravel.

[0003] Drilling rigs with high-torque power heads and automatically interlocking telescopic drill rods are suitable for drilling holes in slightly weathered rock formations. For reinforced concrete cast-in-place pile foundations, the quality of the cast-in-place pile hole is particularly important. Different drilling tools should be selected according to the different strata. Drilling rig bits are available in single-bottom, double-bottom, spiral, and barrel drills. Single-bottom and double-bottom drill bits are often used during construction. Single-bottom drill bits are more capable of cutting soil than double-bottom drill bits when drilling. When encountering silty formations during construction, double-bottom drills can experience drill suction, damaging the hole wall and affecting the wall protection. Single-bottom drills can easily penetrate silty formations. However, when a single-bottom drill bit is withdrawn, the silt in the drill bucket will exit through the inlet between the baseplate and the drill bucket, making it difficult for the single-bottom drill bit to remove the soil from the hole. This causes the single-bottom drill bit to agitate the silty formation for a long time, affecting the soil structure and causing the hole to collapse. Utility Model Content

[0004] In order to overcome the defects in the above-mentioned related technologies, the utility model proposes a rotary drilling hole collapse prevention device, which can reduce the situation of silt sliding out of the drill bucket and improve the working efficiency of the single-bottom drill bit.

[0005] In order to achieve the above technical objectives, the present invention provides a device for preventing hole collapse in rotary drilling, and the device comprises: a rotary drilling bit, a baffle and a baffle. The rotary drilling bit comprises a drill bucket and a base plate, the drill bucket is a cylinder with an opening at the lower end, the base plate is a plate, the base plate is hinged to the side wall of the drill bucket, and when the base plate is closed to the lower end of the drill bucket, a feed gap exists between the base plate and the opening at the lower end of the drill bucket. The baffle is hinged to the base plate, and when the baffle is parallel to the base plate, the baffle is within the range of the feed gap. The baffle is fixed to the base plate, and the baffle is arranged outside the space formed by the baffle and the drill bucket. The baffle is configured to support the baffle so that the baffle rotates in the drill bucket.

[0006] Preferably, the baffle is a plate, the shape of the baffle is adapted to the shape of the feed gap, the baffle blocks the feed gap, or there is a gap between the baffle and the feed gap.

[0007] Preferably, the width of the gap is less than 2 cm.

[0008] Preferably, a pressure control component is installed within the drill bucket, comprising an oil pipe, a hydraulic oil pipe, and a rotary cylinder. The oil pipe is fixed to the side wall of the drill bucket from top to bottom. The hydraulic oil pipe is installed within the oil pipe and is connected to the hydraulic oil pump. The housing of the rotary cylinder is fixedly connected to the drill bit, the piston of the rotary cylinder is fixedly connected to the baffle, and the rotary cylinder is connected to the hydraulic oil pipe.

[0009] The beneficial effects of the present invention are:

[0010] The utility model adopts a baffle hinged on the rotary drill bit. When the drill bucket rotates downward, the soil pushes the baffle to open the feed gap, facilitating the entry of soil. The utility model also adopts a stopper. When the drill bucket is lifted upward, the soil slides outward, driving the baffle to rotate outward until the block supports the baffle in place, so that the baffle blocks the feed gap, preventing a large amount of soil from sliding out of the drill bucket, thereby improving the working efficiency of the drill bucket. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a bottom view of the utility model;

[0014] Figure 3 It is a top view of the baffle and bottom plate of the utility model. DETAILED DESCRIPTION

[0015] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0018] like Figures 1 to 3 As shown, some embodiments of the present invention provide a device for preventing hole collapse in a rotary drilling hole, the device comprising: a rotary drilling bit 1, a baffle 2, and a block 3. The rotary drilling bit 1 comprises a drilling bucket 11 and a bottom plate 12, the drilling bucket 11 being a cylinder with an opening at the lower end, the bottom plate 12 being a plate, the bottom plate 12 being hinged to the side wall of the drilling bucket 11, and when the bottom plate 12 is closed to the lower end of the drilling bucket 11, a feed gap exists between the bottom plate 12 and the opening at the lower end of the drilling bucket 11. The baffle 2 is hinged to the bottom plate 12, and when the baffle 2 is parallel to the bottom plate 12, the baffle 2 is within the range of the feed gap 21. The block 3 is fixed to the bottom plate 12, and the block 3 is disposed outside the space formed by the baffle 2 and the drilling bucket 11, and the block 3 is configured to support the baffle 2 so that the baffle 2 rotates within the drilling bucket 11.

[0019] In some examples, the rotary drilling hole collapse prevention device includes a rotary drilling bit 1, the drill bucket 11 of the rotary drilling bit 1 is hinged to the base plate 12, and a hydraulic drive component is provided between the drill bucket 11 and the base plate 12, so that the operator of the rotary drilling rig can operate the base plate 12 to close to the lower end of the drill bucket 11 or open the base plate 12 in the operating room.

[0020] During use, when the bottom plate 12 is closed to the lower end of the drill bucket 11, the drill bucket 11 is rotated and pressed downward by the rotary drilling rig, filling the soft soil or silt into the drill bucket 11 through the gap between the bottom plate 12 and the drill bucket 11. After the drill bucket 11 is lifted upward, the rotary drilling rig moves the drill bucket 11 to a suitable position and opens the bottom plate 12 through the hydraulic drive to discharge the soil in the drill bucket 11.

[0021] A baffle 2 is hingedly connected to the base plate 12. The baffle 2 is hingedly connected to the base plate 12 via a hinge, which is fixedly connected to the base plate 12 and the baffle 2 by welding. When the base plate 12 is closed from the opening of the drill bucket 11, the baffle 2 can rotate freely within the drill bucket 11. When the baffle 2 is parallel to the base plate 12 (the base plate 12 can be a plate), the baffle 2 blocks the corresponding feed gap.

[0022] The present invention further includes a stopper 3, which can be fixed to the bottom plate 12 outside the drill bucket 11 and can be positioned within the feed gap. When the baffle 2 rotates to be parallel to the bottom plate 12, the stopper 3 supports the baffle 2, preventing it from rotating outside the drill bucket 11.

[0023] During use, the drill bucket 11 is rotated downward to dig, and the baffle 2 rotates inward under the action of the soil, thereby opening the feed gap and allowing the soil to smoothly enter the drill bucket 11. When the drill bucket 11 is lifted, the baffle 2 rotates outward under the action of the soil until the block 3 supports the baffle 2, which blocks the feed gap and prevents the soil from slipping out when the drill bucket 11 is lifted.

[0024] Afterwards, the drill bucket 11 is moved to a suitable position, and the operator of the rotary drilling rig controls the hydraulic drive member to open the bottom plate 12 to allow the soil to be discharged from the drill bucket 11.

[0025] In some embodiments, the baffle 2 is a plate, and the shape of the baffle 2 is adapted to the shape of the feed gap. The baffle 2 blocks the feed gap, or there is a gap between the baffle 2 and the feed gap.

[0026] In some embodiments, the width of the gap is less than 2 cm.

[0027] In some embodiments, the drill bucket 11 is internally provided with a pressure control component, which includes an oil pipe, a hydraulic oil pipe, and a rotary cylinder. The oil pipe is fixed to the side wall of the drill bucket 11 from top to bottom. The hydraulic oil pipe is disposed within the oil pipe and is in communication with the hydraulic oil pump. The rotary cylinder's housing is fixedly connected to the drill bit, its piston is fixedly connected to the baffle 2, and the rotary cylinder is in communication with the hydraulic oil pipe.

[0028] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0029] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A device for preventing hole collapse during rotary drilling, characterized in that: include: A rotary drilling bit, comprising a drilling bucket and a bottom plate, wherein the drilling bucket is a cylindrical body with an opening at the lower end, and the bottom plate is a plate member, which is hinged to the side wall of the drilling bucket. When the bottom plate is closed to the lower end of the drilling bucket, a feeding gap exists between the bottom plate and the opening at the lower end of the drilling bucket. a baffle, wherein the baffle is hinged to the bottom plate, and when the baffle is parallel to the bottom plate, the baffle is within the range of the feeding gap; A stopper is fixed to the base plate and is arranged outside a space formed by the baffle and the drill bucket. The stopper is configured to support the baffle so that the baffle rotates in the drill bucket.

2. The hole-collapse prevention device for rotary drilling according to claim 1, characterized in that: The baffle is a plate member, and the shape of the baffle is adapted to the shape of the feed gap. The baffle blocks the feed gap, or there is a gap between the baffle and the feed gap.

3. The hole-collapse prevention device for rotary drilling according to claim 2, characterized in that: The width of the gap is less than 2 cm.

4. The hole-collapse prevention device for rotary drilling according to claim 3, characterized in that: A pressure control component is provided inside the drill bucket, and the pressure control component further comprises: An oil pipe, the oil pipe being fixed on the side wall of the drill bucket from top to bottom; A hydraulic oil pipe, the hydraulic oil pipe is arranged in the oil pipe and is connected to the hydraulic oil pump; A rotating oil cylinder, a shell of which is fixedly connected to the drill bit, a piston of which is fixedly connected to the baffle, and the rotating oil cylinder is communicated with the hydraulic oil pipe.

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