A hole collapse prevention device

Abstract

The application discloses a hole collapse preventing device, and relates to the technical field of vertical drilling, which comprises a base, sector plates, arc plates and a driving mechanism. The base can be fixed at the orifice of a drilling hole. The sector plates are horizontally arranged and slidably arranged on the base. A plurality of sector plates are arranged in a circumferential distribution. The driving mechanism is connected with the sector plates and can drive the plurality of sector plates to fold or unfold. The bottom of any sector plate is connected with a vertically arranged arc plate. When the plurality of sector plates unfold, the plurality of arc plates can enclose a circular sleeve to support the hole wall of the drilling hole. When the plurality of sector plates fold, the arc plates can be separated from the hole wall of the drilling hole. The hole collapse preventing device can be conveniently taken and placed while effectively supporting the hole wall of the drilling hole.

Description

Technical Field

[0001] This invention relates to the field of vertical drilling technology, and in particular to a device for preventing hole collapse. Background Technology

[0002] During the drilling process of vertical boreholes, the soil or rock mass at a depth of 0-2 meters underground is relatively loose and broken. Therefore, during the drilling process of vertical boreholes, it is necessary to install casing on the inner wall of the borehole in the near-surface section to maintain the stability of the borehole and prevent the borehole from collapsing during the drilling process, which would hinder normal construction.

[0003] Currently, the casing used in vertical drilling is mainly a metal cylinder with a diameter matching the inner diameter of the borehole. During casing placement, external force is primarily used to press the metal cylinder into the ground. Similarly, when removing the casing after drilling is complete, external force is needed to pull the metal cylinder out of the ground. Since the external force used for casing placement on the construction site mainly comes from the drilling rig, this frequent pressing and pulling process can damage the drilling rig and waste a significant amount of time.

[0004] Therefore, an anti-collapse hole device is provided to solve the above-mentioned problems existing in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a hole-prevention device to solve the problems existing in the prior art, which can effectively support the borehole wall while facilitating removal and placement.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides an anti-collapse hole device, comprising a base, a sector plate, an arc plate, and a driving mechanism. The base is fixed to the opening of a drilled hole. The sector plates are horizontally arranged and slidably mounted on the base. Multiple sector plates are arranged in a circular pattern. The driving mechanism is connected to the sector plates and can drive them to close or unfold. Each sector plate has a vertically arranged arc plate connected to its bottom. When the sector plates unfold, they form a circular sleeve to support the hole wall. When the sector plates close, the arc plate detaches from the hole wall.

[0008] Preferably, the two sides of the sector plate are a first arc-shaped side and a second arc-shaped side, the length of the first arc-shaped side is less than the length of the second arc-shaped side, the bottom of the first arc-shaped side is connected to the arc-shaped plate, and the top of the arc-shaped plate is flush with the first arc-shaped side.

[0009] Preferably, the driving mechanism comprises a positioning plate and a connecting rod mechanism, the positioning plate is horizontally arranged above the base, and a plurality of sliding grooves are uniformly distributed on the circumference of the positioning plate, the sliding grooves, the connecting rod mechanism and the sector plates are arranged in one-to-one correspondence, one end of the connecting rod mechanism is connected with the corresponding sector plate, and the other end is slidingly arranged in the corresponding sliding groove, and the connecting rod mechanism can drive the plurality of sector plates to fold or unfold by sliding in the sliding groove.

[0010] Preferably, the sliding groove comprises a straight segment and an arc segment which are connected, the straight segment is arranged close to the sector plate and extends along the radial direction of the drill hole, when the connecting rod mechanism moves outward along the straight segment, the arc-shaped plate can be in contact with the hole wall of the drill hole, when the connecting rod mechanism moves along the arc segment, the arc-shaped plate can rotate around the position where it is in contact with the hole wall of the drill hole, and when the connecting rod mechanism moves to the tail end of the sliding groove, the plurality of arc-shaped plates can surround the circular sleeve.

[0011] Preferably, the head end and the tail end of the sliding groove are further respectively provided with a first limiting groove and a second limiting groove, and the depths of the first limiting groove and the second limiting groove are greater than the depth of the sliding groove.

[0012] Preferably, any one of the connecting rod mechanisms comprises a connecting rod and a fixing rod, the connecting rod is vertically arranged, and the bottom end of the connecting rod is fixedly connected to the top end of the sector plate, the fixing rod is an inverted L-shaped rod comprising a horizontal rod and a vertical rod, the bottom end of the vertical rod is slidingly arranged in the sliding groove, one end of the horizontal rod is connected to the top end of the vertical rod, and the other end is provided with a sleeve ring, the sleeve ring is sleeved on the connecting rod, so that the fixing rod can move up and down relative to the connecting rod, and the connecting rod can rotate relative to the fixing rod.

[0013] Preferably, the top end of the connecting rod is detachably provided with a baffle, which can prevent the sleeve ring from separating from the connecting rod.

[0014] Preferably, the sector plates and the arc-shaped plates are provided with seven groups.

[0015] Preferably, a plurality of lightening holes are further formed in any one of the arc-shaped plates.

[0016] Preferably, the lightening holes are irregular elliptical holes.

[0017] The present application has the following technical effects compared with the prior art:

[0018] The anti-collapse hole device of this invention mainly includes a base, a sector plate, an arc plate, and a driving mechanism. The base can be fixed at the opening of the drilled hole. The sector plate is horizontally arranged and slidably mounted on the base. Multiple sector plates are arranged in a circular pattern. The driving mechanism is connected to the sector plates and can drive the multiple sector plates to close or unfold. A vertically arranged arc plate is connected to the bottom of each sector plate. When the multiple sector plates unfold, the multiple arc plates can form a circular sleeve to support the hole wall. When the multiple sector plates close, the arc plate can detach from the hole wall.

[0019] In this invention, when the anti-collapse hole device is inserted into a vertical borehole, a driving mechanism drives multiple fan-shaped plates to close together, making the maximum size of the underground structure composed of multiple arc-shaped plates smaller than the diameter of the vertical borehole. This allows it to be easily inserted into the ground without relying on external force. After being inserted into the vertical borehole, the driving mechanism drives multiple fan-shaped plates to unfold, forming a circular sleeve. The diameter of this circular sleeve matches the inner diameter of the borehole, effectively supporting the borehole wall and preventing collapse. When the anti-collapse hole device needs to be removed, the driving mechanism drives multiple fan-shaped plates to close together, making it easy to remove without relying on a drilling rig or other forms of external force to pull out the sleeve.

[0020] This invention provides effective support for the borehole wall, facilitates placement and removal of casing, and avoids the need for external force to press or pull the casing, thus extending the service life of the drilling rig and saving construction time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top view of the anti-collapse hole device in an embodiment of the present invention;

[0023] Figure 2 This is a bottom view of the anti-collapse hole device in an embodiment of the present invention;

[0024] Figure 3 This is a side view of the anti-collapse hole device in an embodiment of the present invention;

[0025] Figure 4 This is a top view of the anti-collapse hole device after the translation stage is completed in an embodiment of the present invention;

[0026] Figure 5 This is a top view showing the final arrangement of the anti-collapse hole device in an embodiment of the present invention;

[0027] Figure 6 This is a side view showing the final arrangement effect of the anti-collapse hole device in an embodiment of the present invention.

[0028] In the diagram: 1-fan-shaped plate, 2-slide groove, 3-connecting rod, 4-positioning plate, 5-second limiting groove, 6-base, 7-arc plate, 8-fixing rod, 9-weight reduction hole, 10-first limiting groove, 11-baffle. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide a hole-prevention device to solve the problems existing in the prior art, which can effectively support the borehole wall while facilitating removal and placement.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] like Figures 1-6 As shown, this embodiment provides an anti-collapse hole device, mainly including a base 6, a sector plate 1, an arc plate 7, and a driving mechanism. The base 6 can be fixed at the opening of the drilled hole. The sector plate 1 is horizontally arranged and slidably arranged on the base 6. There are multiple sector plates 1, which are distributed circumferentially. The driving mechanism is connected to the sector plates 1 and can drive the multiple sector plates 1 to close or unfold. The bottom of any sector plate 1 is connected to a vertically arranged arc plate 7. When the multiple sector plates 1 are unfolded, the multiple arc plates 7 can form a circular sleeve to support the hole wall of the drilled hole. When the multiple sector plates 1 are closed, the arc plate 7 can detach from the hole wall of the drilled hole.

[0034] In this embodiment, when the anti-collapse hole device is inserted into the vertical borehole, the drive mechanism drives multiple fan-shaped plates 1 to close, making the maximum size of the underground structure composed of multiple arc-shaped plates 7 smaller than the diameter of the vertical borehole. This allows for easy insertion into the ground without the need for external force. After insertion, the drive mechanism drives the multiple fan-shaped plates 1 to unfold, forming a circular sleeve. The diameter of this sleeve matches the inner diameter of the borehole, effectively supporting the borehole wall and preventing collapse. When the anti-collapse hole device needs to be removed, the drive mechanism drives the multiple fan-shaped plates 1 to close, facilitating easy removal without relying on the drilling rig or other forms of external force to pull out the sleeve. This embodiment effectively supports the borehole wall, facilitates insertion and removal, and avoids the need for external force to press or pull the casing, extending the drilling rig's service life and saving construction time.

[0035] In this embodiment, the two sides of the fan-shaped plate 1 are a first arc-shaped side and a second arc-shaped side, respectively. The length of the first arc-shaped side is less than the length of the second arc-shaped side. The bottom of the first arc-shaped side is connected to the arc-shaped plate 7, and the top of the arc-shaped plate 7 is flush with the first arc-shaped side.

[0036] In this embodiment, the driving mechanism includes a positioning plate 4 and a linkage mechanism. The positioning plate 4 is horizontally disposed above the base 6, and multiple sliding grooves 2 are evenly distributed along the circumference of the positioning plate 4. The sliding grooves 2, the linkage mechanism, and the sector plates 1 are arranged in a one-to-one correspondence. One end of the linkage mechanism is connected to the corresponding sector plate 1, and the other end is slidably disposed in the corresponding sliding groove 2. By sliding the linkage mechanism in the sliding groove 2, the multiple sector plates 1 can be driven to close or unfold.

[0037] It should be noted that the base 6 and the positioning plate 4 both have a circular opening in the middle that matches the diameter of the drill hole, so that the multiple arc plates 7 can move within them.

[0038] In this embodiment, the sector plate 1, the arc plate 7, and the positioning plate 4 are all preferably steel plates to improve the overall strength; the number of sector plates 1 and arc plates 7 can be selected according to specific work needs, preferably seven sets.

[0039] In this embodiment, the slide groove 2 includes a connected straight section and an arc section. The straight section is located close to the sector plate 1 and extends radially along the borehole. When the linkage mechanism moves outward along the straight section, the arc plate 7 can contact the borehole wall. When the linkage mechanism moves along the arc section, the arc plate 7 can rotate around the position where it contacts the borehole wall. When the linkage mechanism moves to the tail end of the slide groove 2 (the end away from the sector plate 1), the multiple arc plates 7 can form a circular sleeve to support the borehole wall and prevent the borehole from collapsing.

[0040] It should be noted that when the linkage mechanism moves outward along the straight segment, it can separate the multiple sector plates 1, so that there is enough space between adjacent sector plates 1 to facilitate subsequent rotation.

[0041] Furthermore, the first and second ends of the slide 2 are respectively provided with a first limiting groove 10 and a second limiting groove 5. The depth of the first limiting groove 10 and the second limiting groove 5 is greater than the depth of the slide 2. When the linkage mechanism moves to the first end of the slide 2, one end of it can be engaged in the first limiting groove 10 to achieve limiting, thereby fixing the fan-shaped plate 1 and the arc-shaped plate 7, facilitating the placement of the anti-collapse hole device underground. In addition, when the linkage mechanism moves to the tail end of the slide 2, one end of it can be engaged in the second limiting groove 5 to achieve limiting, thereby effectively supporting the borehole wall.

[0042] In this embodiment, each of the linkage mechanisms includes a connecting rod 3 and a fixing rod 8. The connecting rod 3 is vertically arranged, and its bottom end is fixedly connected to the top end of the corresponding sector plate 1. The fixing rod 8 is an inverted L-shaped rod, including a horizontal rod and a vertical rod. The bottom end of the vertical rod is slidably disposed in the sliding groove 2. One end of the horizontal rod is connected to the top end of the vertical rod, and the other end is provided with a collar. The collar is sleeved on the connecting rod 3 so that the fixing rod 8 can move up and down relative to the connecting rod 3, and the connecting rod 3 can rotate relative to the fixing rod 8, so that the bottom end of the vertical rod of the fixing rod 8 can be inserted into the second limiting groove 5 and the first limiting groove 10.

[0043] In this embodiment, a collar is provided at one end of the transverse rod near the connecting rod 3. The collar is fitted onto the connecting rod 3, enabling a detachable connection between the connecting rod 3 and the fixing rod 8. This allows the entire anti-collapse hole device to be disassembled into seven structures including the connecting rod 3, the fan-shaped plate 1, and the arc-shaped plate 7, and one structure including the fixing rod 8, the positioning plate 4, and the base 6. This facilitates disassembly, maintenance, and replacement, and increases portability for easy transportation. Furthermore, a baffle 11 can be detachably provided at the top of the connecting rod 3 to prevent the collar from detaching from the connecting rod 3 at will.

[0044] In this embodiment, each of the arc-shaped plates 7 is also provided with multiple weight-reducing holes 9, which can reduce the overall weight of the structure including the connecting rod 3, the fan-shaped plate 1, and the arc-shaped plate 7, making it easier to transport. Moreover, the hole wall of the vertical drill is not smooth, and there are many protrusions on the drill hole wall. When the structure composed of the connecting rod 3, the fan-shaped plate 1, and the arc-shaped plate 7 is installed, it can bypass these protrusions through the weight-reducing holes 9 on the arc-shaped plate 7, so that the circular sleeve composed of multiple arc-shaped plates 7 has a tighter contact with the hole wall of the vertical drill, enhancing the anti-collapse effect.

[0045] It should be further explained that the weight reduction hole 9 can be an irregular elliptical hole of varying sizes, or other shapes of holes can be selected according to specific working needs.

[0046] The working principle of the anti-collapse hole device in this embodiment is as follows:

[0047] During the burial process, such as Figure 4 As shown, the connecting rod 3, the sector plate 1, and the arc plate 7 are moved by the translational sliding of the fixed rod 8 within the straight section of the slide groove 2, allowing the seven arc plates 7, originally located in the center, to contact the vertical borehole wall. Then, the connecting rod 3, the sector plate 1, and the arc plate 7 are moved by the sliding of the fixed rod 8 within the arc section of the slide groove 2, causing the seven arc plates 7 from the previous stage to rotate around their contact point with the vertical borehole wall, thus forming a circular sleeve through rotation. At this point, the fixed rod 8 is above the second limiting groove 5. Moving the fixed rod 8 vertically downwards into the second limiting groove 5 fixes the entire structure, thus achieving the anti-collapse effect during the vertical borehole drilling process. The final arrangement is as follows. Figure 5 , Figure 6 As shown. When the vertical drilling process is completed and this device needs to be removed, simply reverse the operation.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A device for preventing hole collapse, characterized in that: The device includes a base, sector plates, arc plates, and a drive mechanism. The base is fixed to the borehole opening. The sector plates are horizontally positioned and slidably mounted on the base. Multiple sector plates are arranged circumferentially. The drive mechanism includes a positioning plate and a linkage mechanism. The positioning plate is horizontally positioned above the base and has multiple circumferentially distributed grooves. Each groove, linkage mechanism, and sector plate corresponds to a sector plate. One end of the linkage mechanism is connected to the corresponding sector plate, and the other end slides within the corresponding groove. The linkage mechanism slides within the groove, causing the multiple sector plates to close or unfold. Each sector plate has a vertically positioned arc plate connected to its bottom. When the multiple sector plates unfold, they form a circular sleeve to support the borehole wall. When the multiple sector plates close, the arc plate detaches from the borehole wall. The chute includes a connected straight section and an arc section. The straight section is located close to the sector plate and extends radially along the borehole. When the linkage mechanism moves outward along the straight section, the arc plate can contact the borehole wall. When the linkage mechanism moves along the arc section, the arc plate can rotate around the position where it contacts the borehole wall. When the linkage mechanism moves to the tail end of the chute, the multiple arc plates can form the circular sleeve.

2. The anti-collapse hole device according to claim 1, characterized in that: The two sides of the sector plate are a first arc edge and a second arc edge, respectively. The length of the first arc edge is less than the length of the second arc edge. The bottom of the first arc edge is connected to the arc plate, and the top of the arc plate is flush with the first arc edge.

3. The anti-collapse hole device according to claim 1, characterized in that: The first and second limiting grooves are respectively provided at the first and second ends of the slide, and the depths of the first and second limiting grooves are both greater than the depth of the slide.

4. The anti-collapse hole device according to claim 3, characterized in that: All of the linkage mechanisms include a connecting rod and a fixed rod. The connecting rod is vertically arranged and its bottom end is fixedly connected to the top end of the sector plate. The fixed rod is an inverted L-shaped rod, including a horizontal rod and a vertical rod. The bottom end of the vertical rod is slidably disposed in the groove. One end of the horizontal rod is connected to the top end of the vertical rod, and the other end is provided with a collar. The collar is sleeved on the connecting rod so that the fixed rod can move up and down relative to the connecting rod, and the connecting rod can rotate relative to the fixed rod.

5. The anti-collapse hole device according to claim 4, characterized in that: The top end of the connecting rod is detachably equipped with a baffle to prevent the collar from detaching from the connecting rod.

6. The anti-collapse hole device according to claim 1, characterized in that: Both the fan-shaped plate and the arc-shaped plate are provided in seven sets.

7. The anti-collapse hole device according to claim 1, characterized in that: Each of the aforementioned arc-shaped plates is also provided with multiple weight-reducing holes.

8. The anti-collapse hole device according to claim 7, characterized in that: The weight-reducing hole is an irregular elliptical hole.

Images