Hole collapse prevention device for loose interlayer drilling

Abstract

The invention discloses a hole collapse prevention device for loose interlayer drilling, and relates to the technical field of hole collapse prevention. The device comprises a supporting mechanism which extends into a hole during use, and the peripheral side wall of the supporting mechanism abuts against the inner wall of the hole; the supporting mechanism comprises four fan-shaped plates which are annularly distributed, and a flexible connecting belt is connected between the edge sides of every two adjacent fan-shaped plates; the inner wall of the fan-shaped plate is provided with a rectangular rib along the length direction of the fan-shaped plate; the distraction structure A and the distraction structure B are supported between the two adjacent sector plates, and each of the distraction structure A and the distraction structure B comprises a sector strip. When the device is used, the supporting mechanism composed of the four fan-shaped plates distributed annularly, the opening structure A and the opening structure B extends into a hole, and the fan-shaped plates abut against the inner wall of the hole, so that the phenomenon of hole collapse in operation is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of hole collapse prevention, and in particular relates to a hole collapse prevention device for drilling holes in loose interlayers. Background Art

[0002] During the construction or related construction process, it is often necessary to open holes on the ground. The soil structure in some areas is soft soil and rock. The thickness of the soft soil can reach 1m-5m. When the rotary drilling rig is digging holes, the soft soil is excavated first, and then the rock can be excavated. Due to the particularity of the soft soil, when excavating the rock, the vibration and impact generated by the operation of the equipment can easily fluidize the soft soil and flow into the excavated hole like a fluid, resulting in the problem of "hole collapse".

[0003] There is currently no unified solution to the problem of "hole collapse" in soft soil layers. The temporary methods of pouring concrete annular guards and expanding the excavation aperture in soft soil layers have problems of large construction volume and long construction period. Summary of the invention

[0004] The purpose of the present invention is to provide a hole-collapse prevention device for drilling holes in loose interlayers. When in use, a supporting mechanism consisting of four annular fan-shaped plates and a support structure A and a support structure B is extended into the hole, and the fan-shaped plates are used to support the inner wall of the hole to prevent the hole from collapsing during operation, thereby solving the problems raised by the existing background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a hole-collapse prevention device for drilling holes in loose interlayers, comprising a support mechanism that extends into the hole when in use, and whose peripheral side walls abut against the inner wall of the hole; the support mechanism comprises four circularly distributed fan-shaped plates, and a flexible connecting belt is connected between the edge sides of two adjacent fan-shaped plates; the inner wall of the fan-shaped plate is provided with rectangular convex ridges along its length direction; and a support structure A and a support structure B are provided between the two adjacent fan-shaped plates, and the support structure A and the support structure B are provided. Each comprises a fan-shaped strip; after installation, the two ends of the fan-shaped strip respectively abut against the side walls of the rectangular ridges on the two adjacent fan-shaped plates, and the outer side wall of the fan-shaped strip abuts against the inner side of the fan-shaped plate; a bulge A is provided on the inner wall of the end of the fan-shaped plate, which abuts against one side of the support structure A; a fan-shaped protrusion is also provided on the outer side wall of the support structure B, and a bulge B is provided on both side end faces of the fan-shaped plate, which abuts against one side of the fan-shaped protrusion, and the two ends of the fan-shaped protrusion abut against the corresponding side end faces of the two adjacent fan-shaped plates.

[0007] Furthermore, the flexible connecting belt includes a mesh, gauze, cotton cloth, and nylon woven cloth, and the outer side wall of the fan-shaped plate is provided with a plurality of protrusions.

[0008] Furthermore, it also includes an expansion mechanism that extends into the interior of the supporting mechanism and controls the four fan-shaped plates to unfold; the expansion mechanism includes a vertical rod located at the center, and the outer peripheral side walls of the vertical rod are each provided with three telescopic rods along its length direction, and the ends of the telescopic rods are provided with plugs; three sockets for plug insertion are provided on the side walls of the rectangular ridge along its length direction; the top of the vertical rod is connected to a traction rope.

[0009] Furthermore, positioning holes are respectively provided on the opposite side walls of the socket, a through hole is provided at the end of the plug, a convex ring is provided on the inner wall of the through hole, and movable columns sliding along the inner wall of the through hole are respectively connected on both sides of the convex ring through springs A, and a positioning block inserted into the positioning hole is provided at the end of the movable column.

[0010] Furthermore, the cross-sections of the positioning block and the positioning hole are both isosceles trapezoids, and the bottom angle of the positioning block is larger than the bottom angle of the positioning hole.

[0011] Furthermore, the telescopic rod comprises an inner sleeve and an outer sleeve which are sealed and matched with each other, and a spring B is connected between the inner sleeve and the outer sleeve.

[0012] Furthermore, a cavity connected to the telescopic rod is provided in the vertical rod along its axial direction, and a pipe joint connected to the cavity is provided on the top of the vertical rod; a hose is connected to the pipe joint, an air intake and exhaust structure is provided at the end of the hose, and the end of the hose is connected to an air pump; the air intake and exhaust structure includes a ring body provided at the end of the hose, a piston that slides along the hose seal is connected to one side of the ring body through a spring C, and an opening is provided on the piston along the cross-section away from the ring body; a limiting ring is provided on the inner wall of the hose, and an exhaust hole is provided on the side wall of the hose between the limiting ring and the ring body; when the air pump is started, the piston abuts against the limiting ring and blocks the exhaust hole; when the air pump is turned off, the piston detaches from the exhaust hole.

[0013] The present invention has the following beneficial effects:

[0014] The present invention prevents the hole from collapsing during operation by extending a supporting mechanism consisting of four circularly distributed fan-shaped plates and a supporting structure A and a supporting structure B into the hole, and using the fan-shaped plates to abut against the inner wall of the hole. The anti-hole collapse device provided by the present invention has a simple structure and is convenient for installation and disassembly of the anti-hole collapse device when in use.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the supporting mechanism structure of the present invention;

[0018] Figure 2 It is a cross-sectional view of the support mechanism of the present invention;

[0019] Figure 3 It is a schematic diagram of the coordination structure of the supporting mechanism and the spreading mechanism of the present invention;

[0020] Figure 4 for Figure 3 Top view;

[0021] Figure 5 This is a schematic diagram of the matching structure of the plug and the socket of the present invention;

[0022] Figure 6 for Figure 5 A partial enlarged view of the middle part;

[0023] Figure 7 It is a schematic diagram of the intake and exhaust structure of the present invention. DETAILED DESCRIPTION

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

[0025] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] See also Figure 1As shown, the present invention is a hole-collapse prevention device for drilling loose interlayers, including a supporting mechanism that extends into the hole when in use, the supporting mechanism includes four circularly distributed fan-shaped plates 1, and a flexible connecting belt 18 is connected between the edge sides of two adjacent fan-shaped plates 1. When in use, after the supporting mechanism is controlled to extend into the hole, the four fan-shaped plates 1 are controlled to move outwardly away from each other, so that the outer walls of the four fan-shaped plates 1 are all against the inner wall of the hole; and through the provision of the flexible connecting belt 18, the hole inner wall collapse phenomenon at the position between two adjacent fan-shaped plates 1 is avoided.

[0027] Based on the above, in order to facilitate the control of the four sector plates 1 to move outward to support the opening for fixing the state during use, as shown in FIG. Figure 2 The inner wall of the fan-shaped plate 1 is provided with a rectangular ridge 11 along its length direction; it also includes a support structure A15 and a support structure B16 supported between two adjacent fan-shaped plates 1, and the support structure A15 and the support structure B16 each include a fan-shaped bar; after installation, the two ends of the fan-shaped bar respectively abut against the side walls of the rectangular ridge 11 on the two adjacent fan-shaped plates 1, and the outer side wall of the fan-shaped bar abuts against the inner side of the fan-shaped plate 1; the inner wall of the end of the fan-shaped plate 1 is provided with a support A protrusion A13 is provided on one side of the support structure A15; a fan-shaped protrusion 17 is also provided on the outer side wall of the support structure B16, and protrusions B14 are provided on both side end faces of the fan-shaped plate 1 to abut against one side of the fan-shaped protrusion 17, and the two ends of the fan-shaped protrusion 17 abut against the corresponding side end faces of the two adjacent fan-shaped plates 1; and then when in use; after controlling the four fan-shaped plates 1 to unfold, the four support structures A15 are installed first, and then the four support structures B16 are installed.

[0028] Specifically, in order to facilitate the control of the four fan-shaped panels 1 to unfold during use, Figure 3-4 , and also includes an expansion mechanism that extends into the interior of the supporting mechanism and controls the four fan-shaped plates 1 to unfold, the expansion mechanism includes a vertical rod 2 located at the center, and the outer peripheral side walls of the vertical rod 2 are provided with three telescopic rods 23 along its length direction, and the ends of the telescopic rods 23 are provided with plugs 24; three sockets 12 for inserting the plugs 24 are provided on the side walls of the rectangular convex ridge 11 along its length direction; the top of the vertical rod 2 is connected to the traction rope 22; and then when in use, the four fan-shaped plates 1 are controlled to be assembled at the ends of the telescopic rods 23 through the cooperation of the sockets 12 and the plugs 24; then the whole is controlled to extend into the hole, and then the telescopic rods 23 are controlled to extend, and then the fan-shaped plates 1 are controlled to unfold.

[0029] In order to avoid the phenomenon that the spreading mechanism and the supporting mechanism are easy to fall off after assembly under the cooperation of the jack 12 and the plug 24, as shown in FIG. Figure 5-6In the present invention, positioning holes 121 are respectively provided on the opposite side walls of the socket 12, a through hole 241 is provided at the end of the plug 24, a convex ring 242 is provided on the inner wall of the through hole 241, and the two sides of the convex ring 242 are respectively connected with movable columns 244 sliding along the inner wall of the through hole 241 through springs A243, and the ends of the movable columns 244 are provided with positioning blocks 245 inserted into the positioning holes 121, and then when in use, the positioning holes 121 and the positioning blocks 245 are used to cooperate to control the assembly to have a relatively firm connection, and the cross-sections of the positioning blocks 245 and the positioning holes 121 are both isosceles trapezoids, and the bottom angle of the positioning blocks 245 is larger than the bottom angle of the positioning holes 121; and after the control support mechanism is unfolded and the support structure A15 and the support structure B16 are arranged, the telescopic rod 23 is controlled to retract, and at this time, the plug 24 is pulled out of the socket 12 under the action of the isosceles trapezoidal inclined surface.

[0030] Based on the above, in order to utilize the flexible connecting belt 18 to prevent the inner wall of the hole from collapsing, the flexible connecting belt 18 of the present invention can be made of but not limited to mesh, gauze, cotton cloth, and nylon woven cloth, etc., and a plurality of protrusions 19 are provided on the outer wall of the fan-shaped plate 1.

[0031] Specifically, the telescopic rod 23 includes an inner sleeve and an outer sleeve that are sealed and matched with each other, and a spring B is connected between the inner sleeve and the outer sleeve.

[0032] It can be known that in order to facilitate the use of the expansion mechanism to control the expansion and storage of the support mechanism during use; a cavity connected to the telescopic rod 23 is provided in the vertical rod 2 along its axial direction, such as Figure 7 A pipe joint 21 connected to the cavity is provided at the top of the vertical rod 2; a hose 20 is connected to the pipe joint 21, an air intake and exhaust structure is provided at the end of the hose 20, and the end of the hose 20 is connected to the air pump; the air intake and exhaust structure includes a ring body 201 provided at the end of the hose 20, one side of the ring body 201 is connected to a piston 203 that slides along the hose 20 in a sealing manner through a spring C202, and the piston 203 is provided with an opening 204 in a direction away from the ring body 201; a limiting ring 205 is provided on the inner wall of the hose 20, and an exhaust hole 206 is provided on the side wall of the hose 20 between the limiting ring 205 and the ring body 201; when the air pump is started, the piston 203 abuts against the limiting ring 205 and blocks the exhaust hole 206; when the air pump is turned off, the piston 203 is detached from the exhaust hole 206.

[0033] Based on the above, when controlling the support mechanism to be stored, it is necessary to first use the expansion mechanism to control the support mechanism to expand to the maximum extent, then take out the expansion structure A15 and the expansion structure B16, and then control the telescopic rod 23 to contract and drive the four fan-shaped plates 1 to be stored.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A hole-collapse prevention device for drilling holes in loose interlayers, characterized in that: It includes a support mechanism that extends into the hole when in use, and the peripheral side wall abuts against the inner wall of the hole; The support mechanism comprises four sector plates (1) distributed in an annular shape, and a flexible connecting belt (18) is connected between the edge sides of two adjacent sector plates (1); The inner wall of the sector plate (1) is provided with rectangular ridges (11) along its length direction; It also includes a support structure A (15) and a support structure B (16) supported between two adjacent sector plates (1), wherein the support structure A (15) and the support structure B (16) each include a sector bar; After installation, the two ends of the fan-shaped strip respectively abut against the side walls of the rectangular ridges (11) on the two adjacent fan-shaped plates (1), and the outer side wall of the fan-shaped strip abuts against the inner side of the fan-shaped plate (1); A protrusion A (13) is provided on the inner wall of the end of the sector plate (1) and abuts against one side of the support structure A (15); The outer side wall of the expansion structure B (16) is also provided with a fan-shaped protrusion (17), and the two side end surfaces of the fan-shaped plate (1) are provided with a protrusion B (14) which abuts against one side of the fan-shaped protrusion (17), and the two ends of the fan-shaped protrusion (17) abut against the corresponding side end surfaces of two adjacent fan-shaped plates (1).

2. The anti-collapse device for loose interlayer drilling according to claim 1, characterized in that: The flexible connecting belt (18) comprises gauze, gauze, cotton cloth, and nylon woven cloth.

3. The anti-hole collapse device for loose interlayer drilling according to claim 1, characterized in that: The outer side wall of the sector plate (1) is provided with a plurality of protrusions (19).

4. The anti-hole collapse device for loose interlayer drilling according to any one of claims 1 to 3, characterized in that: It also includes an expansion mechanism that extends into the interior of the support mechanism and controls the four fan-shaped plates (1) to expand; the expansion mechanism includes a vertical rod (2) located at the center, the outer peripheral side walls of the vertical rod (2) are each provided with three telescopic rods (23) along the length direction thereof, and the ends of the telescopic rods (23) are provided with plugs (24); and the side walls of the rectangular convex ridge (11) are provided with three insertion holes (12) for inserting the plugs (24) along the length direction thereof.

5. The anti-collapse device for loose interlayer drilling according to claim 4, characterized in that: Positioning holes (121) are respectively arranged on the opposite side walls of the plug hole (12), a through hole (241) is arranged at the end of the plug (24), a convex ring (242) is arranged on the inner wall of the through hole (241), both sides of the convex ring (242) are connected to movable columns (244) sliding along the inner wall of the through hole (241) through springs A (243), and a positioning block (245) inserted into the positioning hole (121) is arranged at the end of the movable column (244).

6. The anti-hole collapse device for loose interlayer drilling according to claim 5, characterized in that: The cross-sections of the positioning block (245) and the positioning hole (121) are both isosceles trapezoids, and the bottom angle of the positioning block (245) is larger than the bottom angle of the positioning hole (121).

7. The anti-hole collapse device for loose interlayer drilling according to claim 4, characterized in that: The telescopic rod (23) comprises an inner sleeve and an outer sleeve which are sealed and matched with each other, and a spring B is connected between the inner sleeve and the outer sleeve.

8. The hole collapse prevention device for loose interlayer drilling according to claim 7, characterized in that: A cavity communicating with the telescopic rod (23) is arranged inside the vertical rod (2) along its axial direction, and a pipe joint (21) communicating with the cavity is arranged at the top of the vertical rod (2).

9. The anti-hole collapse device for loose interlayer drilling according to claim 4, characterized in that: The pipe joint (21) is connected to a hose (20), an air inlet and outlet structure is arranged at the end of the hose (20), and the end of the hose (20) is connected to an air pump; The air intake and exhaust structure comprises a ring body (201) arranged at the end of a hose (20); one side of the ring body (201) is connected to a piston (203) that slides along the hose (20) in a sealed manner via a spring C (202); and an opening (204) is arranged on the piston (203) with a cross section arranged in a direction away from the ring body (201); A limiting ring (205) is provided on the inner wall of the hose (20), and an exhaust hole (206) is provided on the side wall of the hose (20) between the limiting ring (205) and the ring body (201); When the air pump is started, the piston (203) abuts against the limiting ring (205) and blocks the exhaust hole (206); when the air pump is turned off, the piston (203) is separated from the exhaust hole (206).

10. The hole collapse prevention device for loose interlayer drilling according to claim 4, characterized in that: The top of the vertical rod (2) is connected to a traction rope (22).

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