Drilling temporary protection device for geotechnical investigation

Abstract

The utility model relates to the technical field of geotechnical investigation, in particular to a temporary drill hole protection device for geotechnical investigation, which comprises a protection plate, a clamping device for clamping the inner wall of a drill hole is mounted below the protection plate, the clamping device comprises a shell, a plurality of telescopic rods are slidably connected in the shell, and the telescopic rods are movably connected with the protection plate. The end shell of the telescopic rod extends out of the shell and abuts against the inner wall of the drill hole. And a driving device for driving the telescopic rod to slide is arranged in the shell. Compared with the prior art, due to the fact that the telescopic rod is arranged, the technical problems that in the prior art, when a drilled hole is temporarily protected, universality is poor, the fixing effect is poor, and the maintenance rate is increased due to the fact that the device is prone to being damaged are solved.

Description

Technical Field

[0001] This utility model patent relates to the field of geotechnical exploration technology, specifically a temporary drilling protection device for geotechnical exploration. Background Art

[0002] The purpose of geotechnical engineering investigation is to use testing means and methods to investigate, study and analyze the construction site, study the geological conditions for the construction of various engineering buildings and the impact of construction on the natural geological environment; study the measures to ensure the strength and stability of the foundation and prevent it from unacceptable deformation when the foundation, base and superstructure work together; propose the bearing capacity of the foundation, provide the project address and geotechnical engineering data required for foundation design and construction, and, when necessary, foundation reinforcement.

[0003] At present, during the construction process of geotechnical engineering survey, it is usually necessary to place a temporary protective plate on the hole mouth of the completed drilled hole to prevent objects from blocking the hole position and making it inconvenient for later sampling work. The existing protective plate structure is described in a temporary protective device for drilling holes for geotechnical survey disclosed in patent number CN202320579311.2, which includes a protective plate body, a lifting rod is fixed at the center of the top of the protective plate body, a column is fixed at the center of the bottom of the protective plate body, and both sides of the column are provided with a movable plate with an arc structure, and the upper and lower ends of the column are movably sleeved with movable sleeves, and the two sides of the movable sleeve are connected to the inner wall of the movable plate with a linkage rod with a cross structure, and the two ends of the linkage rod are respectively hinged to the outer side of the movable sleeve and the inner wall of the movable plate, and the upper and lower ends of the movable sleeve are provided with a limit ring fixedly sleeved on the outside of the column, and the gap between the limit ring and the upper and lower ends of the movable sleeve is provided with a compression spring sleeved on the outside of the column.

[0004] This temporary protective device for drilling holes used in geotechnical investigations can be stably positioned and fixed at the hole mouth, solving the problem that the protective plate is easily displaced and the drill hole is exposed, and is convenient for actual use. However, this temporary protective device for drilling holes used in geotechnical investigations has the following defects during actual use: the movable space of the two movable plates is small (from the attached drawings and the recorded content, the movable space is only the elastic deformation space of the compression spring), and it cannot adapt to different drill holes with large differences in aperture. Therefore, the versatility of this device is not high.

[0005] The patent number CN202420267725.6 discloses a temporary protective device for drilling holes for geotechnical exploration, in which the movable plate is replaced with an airbag, which is used to clamp the inner wall of the borehole, and can adapt to boreholes of different apertures, solving the problem of poor versatility of the original temporary protective device for drilling holes for geotechnical exploration. However, this airbag-type protective device contacts the inner wall of the borehole through the airbag, and the airbag is easily deformed when subjected to force. The protective device is still easy to fall off when subjected to external force, and when the inner wall of the borehole is relatively rough, the airbag is easily scratched by the gravel on the inner wall of the borehole. Because the fixing effect of this airbag-type temporary protective device for drilling holes for geotechnical exploration is poor, the device is easily damaged and the maintenance rate is high. Utility Model Content

[0006] The utility model is intended to provide a temporary protection device for drilling holes for geotechnical exploration, which is mainly used to solve the technical problems existing in the prior art when temporarily protecting drilling holes, such as poor versatility, poor fixing effect and easy damage of the device, resulting in increased maintenance rate.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A temporary protective device for drilling holes used in geotechnical exploration includes a protective plate, a clamping device for clamping the inner wall of the drill hole is installed below the protective plate, the clamping device includes a shell, and a plurality of telescopic rods are slidably connected to the inside of the shell. The end shells of the telescopic rods extend out of the shell and abut against the inner wall of the drill hole; a driving device for driving the telescopic rods to slide is provided inside the shell.

[0009] The working principle and beneficial effects of this utility model:

[0010] The existing technology clamps the inner wall of the drill hole through a movable plate, but the versatility is not high, or clamps the inner wall of the drill hole through an airbag, but the stability is not strong and the airbag is easy to rupture. The design of this solution drives the telescopic rod to extend out of the inner wall of the shell to press against the inner wall of the drill hole. On the one hand, the telescopic rod can be telescoped relative to the shell, and can adapt to different sizes of drill holes, and has high versatility. Secondly, this device mainly uses the telescopic rod to make hard contact with the inner wall of the drill hole, which has high stability and is less likely to be damaged by the rough inner wall of the drill hole than the airbag. In summary, compared with the existing technology, the technical problems of the existing technology in temporary protection of the drill hole, such as poor versatility, poor fixing effect and easy damage of the device, which leads to increased maintenance rate are solved.

[0011] Preferably, the engaging device includes a rotating shaft rotatably connected to the protective plate, the end of the rotating shaft passing through the center of the protective plate and extending into the interior of the housing. The end of the rotating shaft extending into the interior of the housing is coaxially fixedly connected to a drive disk. The drive disk is provided with a plurality of curved slots arranged equidistantly around the circumference. The telescopic rod is positioned between the drive disk and the protective plate. A slide bar is fixedly connected to the lower surface of the telescopic rod, which is inserted into and slidable within the slots. The housing is provided with a plurality of through slots matching the telescopic rod. The end of the telescopic rod distal to the slide bar passes through the through slots and extends out of the housing. In this embodiment, rotating the rotating shaft drives the drive disk to rotate, thereby causing the slide bar below the telescopic rod to slide within the slot, thereby causing the telescopic rod to slide within the slot, and the end of the telescopic rod to approach or move away from the inner wall of the drilled hole.

[0012] Preferably, a limit plate is coaxially fixed on the rotating shaft, and the limit plate is located above the protective plate and contacts the protective plate. In this solution, the protective plate prevents the rotating shaft from separating from the protective plate. At the same time, the limit plate and the drive disc sandwich the protective plate and the telescopic rod.

[0013] Preferably, a cross slot is provided at the upper end of the rotating shaft, and a cross slider is slidably connected in the cross slot. In this solution, rotating the cross slider can drive the rotating shaft to rotate.

[0014] Preferably, a circular ring coaxially arranged with the rotating shaft is fixed to the upper surface of the protective plate, and a plurality of equally spaced tooth grooves are formed on the inner surface of the circular ring. The edge of the cross slide is fixed with protruding teeth that can be inserted into the tooth grooves; when the cross slide slides in the cross slide, the protruding teeth can be inserted into or removed from the tooth grooves. In this solution, rotating the cross slide can drive the rotating shaft to rotate. When the end of the telescopic rod has abutted the inner wall of the drill hole, pressing the cross slide downward causes the protruding teeth on the cross slide to insert into the tooth groove of the circular ring. The cross slide can no longer rotate, and thus the rotating shaft cannot rotate either. Ultimately, the position of the telescopic rod is locked, preventing the entire device from loosening during the drill hole protection process and causing the entire device to fall out of the drill hole.

[0015] Preferably, a fixing plate is secured to the end of the telescopic rod extending from the housing, and the side of the fixing plate facing away from the telescopic rod is machined to have an arcuate surface that conforms to the inner wall of the drilled hole. In this embodiment, when the telescopic rod moves toward the inner wall of the drilled hole, it drives the fixing plate against the inner wall of the drilled hole, thereby increasing the contact area between the device and the inner wall of the drilled hole. The arcuate surface enhances the adaptability of the fixing plate to the inner wall of the drilled hole.

[0016] Preferably, the protective plate is also fixedly connected to a protective shell, and the circular ring, rotating shaft, and cross slider are all located inside the protective shell. A circular hole is opened in the middle of the protective shell, and the upper end of the cross slider extends out of the protective shell through the circular hole, and the convex tooth is located inside the protective shell; the thickness between the upper and lower surfaces of the convex tooth is less than the distance between the upper surface of the circular ring and the inner top surface of the protective shell. In this solution, the protective shell is used to protect the circular ring, rotating shaft, cross slider and other parts from external damage on the one hand, and on the other hand, the protective shell can limit the upward movement position of the convex tooth. During use, the operator can pull the cross slider upward so that the convex tooth presses against the upper surface of the protective shell and cannot be pulled out further, thus ensuring that the convex tooth has disengaged from the tooth groove. Then, the operator rotates the cross slider to drive the rotating shaft to rotate until the rotating shaft cannot rotate anymore. Then, the operator tries to gently pull the entire device. After confirming that the entire device cannot easily fall out of the drilled hole, the operator presses down the cross slider so that the convex tooth is inserted into the tooth groove, thereby limiting the cross slider from rotating further, thereby locking the position of the telescopic rod.

[0017] Preferably, a handle for facilitating the rotation of the cross slide is fixed to the upper end of the cross slide. In this solution, the handle can facilitate the operator to rotate the cross slide.

[0018] Preferably, the curved surface of the fixing plate is also covered with a rubber layer. In this solution, the rubber layer can increase the friction between the fixing plate and the inner wall of the drill hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of a temporary protection device for drilling holes used in geotechnical investigations according to the utility model patent;

[0020] Figure 2 This is an exploded view of a temporary protection device for drilling holes used in geotechnical investigations according to the utility model patent;

[0021] Figure 3 This utility model patent is a temporary protection device for drilling holes used in geotechnical exploration Figure 2 A magnified view of point A;

[0022] Figure 4 This is a partial three-dimensional structure of a temporary protection device for drilling holes used in geotechnical exploration. Figure 1 (without protective plate, shell or protective case);

[0023] Figure 5 This is a partial three-dimensional structure of a temporary protection device for drilling holes used in geotechnical exploration. Figure 2 (Without protective plate, shell or protective case).

[0024] The figure marks in the drawings of the specification include: protective plate 1, warning sign 11, shell 2, through slot 21, rotating shaft 31, drive disc 32, slide slot 321, limit plate 33, cross slide slot 331, telescopic rod 41, slide rod 42, fixed plate 43, cross slider body 51, cylinder 52, protruding teeth 53, handle 54, ring 6, tooth groove 61, protective shell 7. DETAILED DESCRIPTION

[0025] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, a temporary protective device for drilling holes used in geotechnical exploration includes a protective plate 1. The protective plate 1 is disc-shaped. A clamping device for clamping the inner wall of the drill hole is installed below the protective plate 1. The clamping device includes a shell 2. The top surface of the shell 2 is open and fixed to the bottom surface of the protective plate 1. The clamping device also includes a rotating shaft 31 rotatably connected to the protective plate 1. The upper end of the rotating shaft 31 is coaxially fixed with a limit plate 33. The limit plate 33 is located above the protective plate 1 and contacts the protective plate 1.

[0027] like Figure 2 As shown, the lower end of the rotating shaft 31 passes through the center of the protective plate 1 and extends into the interior of the housing 2. The lower end is coaxially fixedly connected to the driving disk 32. The driving disk 32 is provided with four curved and arc-shaped sliding grooves 321 arranged in an equidistant circle. One end of the sliding groove 321 is close to the center of the protective plate 1, and the other end is close to the edge of the protective plate 1. Four telescopic rods 41 are provided between the driving disk 32 and the protective plate 1. The lower surfaces of the four telescopic rods 41 are fixedly connected to sliding rods 42. The sliding rods 42 correspond to the sliding grooves 321 one by one and are inserted into the sliding grooves 321 and can slide within the sliding grooves 321.

[0028] The shell 2 is provided with several through slots 21 that match the telescopic rod 41. The end of the telescopic rod 41 away from the sliding rod 42 passes through the through slot 21 and extends out of the shell 2. A fixing plate 43 is fixed to the end of the telescopic rod 41 extending out of the shell 2. The side of the fixing plate 43 away from the telescopic rod 41 is processed into an arc surface that fits the inner wall of the drilled hole, and the arc surface is also covered with a rubber layer.

[0029] The rotating shaft 31 is rotated to drive the driving disk 32 to rotate together, so that the sliding rod 42 under the telescopic rod 41 slides in the sliding groove 321, thereby prompting the telescopic rod 41 to slide in the through groove 21, and the end of the telescopic rod 41 approaches or moves away from the inner wall of the drilled hole. When the telescopic rod 41 moves toward the inner wall of the drilled hole, it can drive the fixing plate 43 to press against the inner wall of the drilled hole, thereby increasing the contact area between the device and the inner wall of the drilled hole. The curved surface increases the adaptability of the fixing plate 43 to the inner wall of the drilled hole, and the rubber layer increases the friction.

[0030] like Figure 3 、 Figure 4 、 Figure 5 As shown, a cross slot 331 is provided at the upper end of the rotating shaft 31, and the cross slot 331 passes through the limit plate 33, and a cross slider is slidably connected in the cross slot 331. The cross slider includes a cross slider body 51 and a cylinder 52 fixed to the upper end of the cross slider body 51, and the cross slider body 51 can be inserted into the cross slot 331 and slide; at the same time, a ring 6 coaxially arranged with the rotating shaft 31 is fixed on the upper surface of the protective plate 1, and the upper surface of the ring 6 is higher than the upper surface of the rotating shaft 31, and a plurality of equidistantly distributed tooth grooves 61 are provided on the inner surface of the ring 6, and an insertable tooth groove 61 is fixed on the edge of the cylinder 52 of the cross slider. The convex tooth 53 is inserted into the tooth groove 61, and there is only one convex tooth 53; when the cross slider body 51 slides in the cross slide groove 331, the convex tooth 53 on the cylinder 52 can be inserted into or disengaged from the tooth groove 61; the rotating cylinder 52 drives the cross slider body 51 to rotate, which can drive the rotating shaft 31 to rotate. When the end of the telescopic rod 41 has rested against the inner wall of the drilled hole, the cross slider is pressed down as a whole, so that the convex tooth 53 on the cylinder 52 of the cross slider is inserted into the tooth groove 61 of the ring 6, and the cross slider body 51 can no longer rotate, thereby making the rotating shaft 31 unable to rotate, and finally locking the position of the telescopic rod 41.

[0031] like Figure 2 As shown, the protective plate 1 is further fixedly connected to a protective shell 7, the bottom of the protective shell 7 is opened and the opening is fixed to the upper surface of the protective plate 1, the circular ring 6, the rotating shaft 31, and the cross slider are all located in the protective shell 7. In some embodiments, the protective shell 7 and the protective plate 1 can be threadedly connected, which is convenient for disassembling the protective shell 7 and loading and unloading internal parts; a circular hole is opened in the middle of the protective shell 7, and the upper end of the cylinder 52 extends out of the protective shell 7 through the circular hole, and a handle 54 for rotating the cylinder 52 is fixed to the upper end of the cross slider, which is convenient for the operator to rotate the cylinder 52 and thus rotate the cross slider body 51; the convex tooth 53 is located in the protective shell 7, and the thickness between the upper and lower surfaces of the convex tooth 53 is less than the distance between the upper surface of the circular ring 6 and the inner top surface of the protective shell 7;

[0032] In actual use, the protective shell 7 is used to protect the ring 6, the rotating shaft 31, the cross slider and other parts from external damage on the one hand, and on the other hand, the protective shell 7 can limit the upward movement of the convex tooth 53. During use, the operator can pull the handle 54 to pull the cylinder 52 upward so that the convex tooth 53 presses against the upper surface of the protective shell 7 and cannot be pulled out further, that is, to ensure that the convex tooth 53 has disengaged from the tooth groove 61, and then rotate the handle 54 to drive the rotating shaft 31 to rotate until the rotating shaft 31 cannot rotate. Try to gently pull the entire device to make sure that the entire device cannot be easily removed from the drilled hole, then press down the handle 54 to drive the convex tooth 53 on the cylinder 52 of the cross slider to insert into the tooth groove 61, thereby limiting the cross slider body 51 from rotating, and then locking the position of the telescopic rod 41.

[0033] A warning sign 11 is also attached to the surface of the protective plate 1 .

[0034] From the above, it can be seen that the technical principles of the present utility model are as follows:

[0035] During use, the operator can pull the handle 54 to pull the cylinder 52 upwards so that the protruding teeth 53 press against the upper surface of the protective shell 7 and cannot be pulled out further, thus ensuring that the protruding teeth 53 have disengaged from the tooth groove 61, and then rotate the handle 54 to drive the rotating shaft 31 to rotate until the rotating shaft 31 cannot rotate. Then try to gently pull the entire device to make sure that the entire device cannot be easily removed from the drill hole, then press down the handle 54 to drive the protruding teeth 53 on the cylinder 52 of the cross slider to insert into the tooth groove 61, thereby limiting the cross slider body 51 from rotating any further, and then locking the position of the telescopic rod 41, so that the device can be firmly fixed on the drill hole to protect the drill hole.

[0036] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A temporary protection device for drilling holes for geotechnical investigation, comprising a protection plate, characterized in that: A clamping device for clamping the inner wall of the drill hole is installed under the protective plate. The clamping device includes a shell, and several telescopic rods are slidably connected inside the shell. The end shells of the telescopic rods extend out of the shell and rest against the inner wall of the drill hole; a driving device for driving the telescopic rods to slide is provided inside the shell.

2. A temporary protection device for drilling holes for geotechnical investigation according to claim 1, characterized in that: The clamping device includes a rotating shaft rotatably connected to the protective plate, the end of the rotating shaft passes through the center of the protective plate and extends into the interior of the shell, the end of the rotating shaft extending into the interior of the shell is coaxially fixedly connected to the driving disk, and a plurality of curved sliding grooves are arranged in an equidistant circle on the driving disk. The telescopic rod is located between the driving disk and the protective plate, and a sliding rod is fixedly connected to the lower surface of the telescopic rod, which is inserted into the sliding groove and can slide in the sliding groove; a plurality of through grooves matching the telescopic rod are provided on the shell, and the end of the telescopic rod away from the sliding rod passes through the through groove and extends out of the shell.

3. A temporary protection device for drilling holes for geotechnical investigation according to claim 2, characterized in that: A limit plate is coaxially fixed on the rotating shaft, and the limit plate is located above the protective plate and contacts the protective plate.

4. A temporary protection device for drilling holes for geotechnical investigation according to claim 3, characterized in that: A cross slide is provided at the upper end of the rotating shaft, and a cross slider is slidably connected in the cross slide.

5. A temporary protection device for drilling holes for geotechnical investigation according to claim 4, characterized in that: A circular ring coaxially arranged with the rotating shaft is fixed on the upper surface of the protective plate, and a plurality of equally spaced tooth grooves are opened on the inner surface of the circular ring. A convex tooth that can be inserted into the tooth groove is fixed on the edge of the cross slider; when the cross slider slides in the cross slide groove, the convex tooth can be inserted into or out of the tooth groove.

6. A temporary protection device for drilling holes for geotechnical investigation according to claim 5, characterized in that: A fixing plate is fixed to one end of the telescopic rod extending out of the housing, and a side of the fixing plate away from the telescopic rod is processed into a curved surface that fits the inner wall of the drill hole.

7. A temporary protection device for drilling holes for geotechnical investigation according to claim 6, characterized in that: A protective shell is also fixedly connected to the protective plate, and the circular ring, rotating shaft, and cross slider are all located inside the protective shell. A circular hole is opened in the middle of the protective shell, and the upper end of the cross slider extends out of the protective shell through the circular hole. The convex teeth are located inside the protective shell; the thickness between the upper and lower surfaces of the convex teeth is less than the distance between the upper surface of the circular ring and the top surface inside the protective shell.

8. A temporary protection device for drilling holes for geotechnical investigation according to claim 7, characterized in that: A handle for facilitating the rotation of the cross slider is fixed to the upper end of the cross slider.

9. A temporary protection device for drilling holes for geotechnical investigation according to claim 8, characterized in that: The curved surface of the fixing plate is also covered with a rubber layer.

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