Stable lowering device for underground karst cave detection structure

Abstract

The utility model belongs to the technical field of underground karst cave detection, and particularly relates to a stable lowering device for an underground karst cave detection structure, which comprises a bottom plate, two oppositely arranged mounting plates fixedly connected onto the bottom plate, a guide wheel and a pinch roller arranged between the two mounting plates, and a driving motor fixedly mounted on one mounting plate and used for driving the guide wheel to rotate. A limiting ring groove allowing the lowering rope to sink is formed in the guide wheel in the circumferential direction, a pressing ring matched with the limiting ring groove is arranged on the pressing wheel in the circumferential direction, and the distance between the pressing ring and the bottom wall of the limiting ring groove is smaller than the outer diameter of the lowering rope. According to the utility model, the driving motor drives the guide wheel to rotate, and the lowering rope stably lowers the underground karst cave detection structure under the action of static friction force, so that the underground karst cave detection structure is prevented from being manually lowered after a worker stretches out the upper part of the body, and the operation safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground karst cave detection, and in particular relates to a device for smoothly lowering an underground karst cave detection structure. Background Art

[0002] In the geological and geomorphological environment where karst landforms are common, such as in Guizhou and other places, underground caves are common, which causes great trouble to the foundation construction of construction projects. It is necessary to treat the underground caves before carrying out foundation construction. However, the size of the caves, the development of cracks, and the filling materials inside are different, and the corresponding cave treatment methods are also different. Therefore, it is necessary to detect the caves before treating them to understand the development of the caves.

[0003] Geological exploration drilling is to drill a hole underground through a geological exploration drill, and use a drill rod and a corer to analyze the underground geological conditions. This method can only detect the location and depth of the cave at that point, but cannot find out the specific development of the cave. Therefore, the optimized cave detection method is: through the geological exploration hole or the pile foundation hole, the underground cave detection structure such as an underwater infrared camera, a sonar detector, etc. is lowered into the underground cave to detect the development of the underground cave, understand the lateral development of the cave, and preliminarily determine the type of groundwater. However, at the construction site, the underground cave detection structure is usually manually lowered by workers using a lowering rope, and the workers need to keep the lowering posture during the detection process, which will make the workers feel sore in their arms; moreover, when the diameter of the pile foundation hole is large, it is dangerous for the workers to stand next to the pile foundation hole, slightly stick out their upper body and stretch out their hands to lower the underground cave detection structure, which poses a safety hazard. Utility Model Content

[0004] The utility model aims to provide a device for smoothly lowering an underground cave detection structure, so as to solve the problem that workers manually lower the underground cave detection structure at a construction site.

[0005] In order to achieve the above-mentioned purpose, the scheme of the utility model is: a device for smoothly lowering an underground cave detection structure, comprising a base plate, two mounting plates arranged opposite to each other are fixedly connected to the base plate, a guide wheel and a pressure wheel are arranged between the two mounting plates, a driving motor for driving the guide wheel to rotate is fixedly installed on one mounting plate, a limiting ring groove for a lowering rope to sink into is provided on the circumference of the guide wheel, a pressure ring matching the limiting ring groove is provided on the circumference of the pressure wheel, and the spacing between the pressure ring and the bottom wall of the limiting ring groove is smaller than the outer diameter of the lowering rope.

[0006] The working principle and beneficial effects of this scheme are as follows: in this scheme, the lowering rope is pressed tightly in the limiting ring groove by the clamping ring, the guide wheel rotates under the drive of the driving motor, and the lowering rope smoothly lowers the underground cave detection structure under the action of static friction, avoiding the need for workers to lean over and manually lower the underground cave detection structure, thereby improving operation safety.

[0007] Optionally, at least two transverse through holes are formed in the bottom plate, and a cross bar passes through each transverse through hole.

[0008] In this solution, the cross bar straddles the pile foundation hole, so that the bottom plate is erected on the pile foundation hole, avoiding the situation that the bottom plate cannot straddle the center of the pile foundation hole due to insufficient length. When lowering the underground karst cave detection structure through the geological exploration hole with a smaller aperture, the cross bar can be removed, and the bottom plate directly straddles the geological exploration hole. In addition, the cross bar forms a cross-shaped frame on the pile foundation hole, effectively preventing workers from falling into the hole and improving the safety of workers' operation beside the hole.

[0009] Optionally, the cross bar is axially provided with a thread section I, a smooth section and a thread section II. The smooth section is in clearance fit with the transverse through hole. The outer diameters of the thread section I and the thread section II are both smaller than that of the smooth section, and external locking nuts are threadedly connected to both the thread section I and the thread section II.

[0010] In this solution, the cross bar straddles the casing of the pile foundation hole. Rotate the external locking nuts so that both external locking nuts abut against the outer wall of the casing of the pile foundation hole, thereby fixing the cross bar at the top of the casing of the pile foundation hole and preventing the cross bar from moving.

[0011] Optionally, a sliding resistance sleeve is fixedly connected to the outer peripheral wall of the smooth section.

[0012] In this solution, the sliding resistance sleeve is used to increase the friction between the smooth section and the inner wall of the transverse through hole, thereby preventing the bottom plate from sliding randomly along the cross bar, ensuring that the radial position of the lowering rope in the hole remains unchanged, and thus avoiding the situation that the underground karst cave detection structure sways left and right in the cave due to the sliding of the bottom plate.

[0013] Optionally, a horizontally arranged push-pull rod is detachably connected to the bottom plate.

[0014] In this solution, workers can push the bottom plate to slide through the push-pull rod, so as to adjust the lowering position of the underground karst cave detection structure according to the internal situation of the karst cave.

[0015] Optionally, the push-pull rod is provided with a thread section III, and two clamping nuts are threadedly connected to the thread section III.

[0016] In this solution, after the bottom plate is slid in place through the push-pull rod, rotate the clamping nuts so that the two clamping nuts clamp the top of the casing of the pile foundation hole, thereby fixing the position of the push-pull rod and further fixing the position of the bottom plate.

[0017] Optionally, a threaded blind hole is formed in the bottom plate, and one end of the push-pull rod close to the bottom plate is provided with a thread section IV that is threadedly engaged with the threaded blind hole.

[0018] In this solution, the detachable connection between the push-pull rod and the bottom plate is realized through the threaded connection between the thread section IV and the threaded blind hole.

[0019] Optionally, the pressing ring is a rubber ring.

[0020] In this solution, the rubber ring has elasticity and applies elastic pressure to the lowering rope in the limiting ring groove, avoiding rigid extrusion of the lowering rope. Description of the Drawings

[0021] Figure 1 FIG. 1 is a three-dimensional structure diagram of the stable lowering device for the underground karst cave detection structure in the first embodiment of the present utility model;

[0022] Figure 2 FIG. 2 is a front view of the stable lowering device for the underground karst cave detection structure in the first embodiment of the present utility model;

[0023] Figure 3 is Figure 2 the top view of;

[0024] Figure 4 is Figure 2 the right view (with the lowering rope) of;

[0025] Figure 5 FIG. 5 is a top view of the stable lowering device for the underground karst cave detection structure in the second embodiment of the present utility model. Detailed Embodiment

[0026] The following is a further detailed description through specific embodiments:

[0027] The reference signs in the attached drawings of the specification include: bottom plate 1, mounting plate 2, guide wheel 3, limiting ring groove 301, pressing wheel 4, driving motor 5, pressing ring 6, cross bar 7, thread section I 701, smooth section 702, thread section II 703, outer locking nut 8, push rod 9, thread section IV 901, thread section III 902, clamping nut 10, pile foundation hole casing 11, lowering rope 12.

[0028] Embodiment 1

[0029] This embodiment is basically as Figures 1 - 4 shown: The stable lowering device for the underground karst cave detection structure includes a bottom plate 1, two oppositely arranged mounting plates 2 are connected to the bottom plate 1 by bolts, a guide wheel 3 and a pressing wheel 4 are arranged between the two mounting plates 2, a driving motor 5 for driving the guide wheel 3 to rotate is mounted on one mounting plate 2 by bolts, one end of the guide wheel 3 and the pressing wheel 4 is rotatably connected to one mounting plate 2, and the other end of the guide wheel 3 and the pressing wheel 4 is rotatably connected to the other mounting plate 2. A limiting ring groove 301 for the lowering rope 12 to sink into is formed in the circumferential direction of the guide wheel 3, a pressing ring 6 matched with the limiting ring groove 301 is adhered to the circumferential direction of the pressing wheel 4, and the distance between the pressing ring 6 and the bottom wall of the limiting ring groove 301 is smaller than the outer diameter of the lowering rope 12 (the "outer diameter" refers to the outer diameter); in this embodiment, the pressing ring 6 is a rubber ring.

[0030] There are two transverse through-holes formed on the bottom plate 1, and each transverse through-hole is penetrated by a cross bar 7. The cross bar 7 is provided with a threaded section I 701, a smooth section 702 and a threaded section II 703 along the axial direction. The smooth section 702 is in clearance fit with the transverse through-hole on the bottom plate 1. A sliding resistance sleeve (not shown in the figure) is fixedly connected to the outer peripheral wall of the smooth section 702. In this embodiment, the sliding resistance sleeve is a rubber sleeve to prevent the bottom plate 1 from sliding randomly along the smooth section 702. The outer diameters of the threaded section I 701 and the threaded section II 703 are both smaller than that of the smooth section 702, and external locking nuts 8 are threadedly connected to both the threaded section I 701 and the threaded section II 703. A horizontally arranged push-pull rod 9 is detachably connected to the bottom plate 1. Specifically, a threaded blind hole is formed on the bottom plate 1, and a threaded section IV 901 that is threadedly engaged with the threaded blind hole is provided at one end of the push-pull rod 9 close to the bottom plate 1.

[0031] During actual use, the cross bar 7 is spanned across the top end of the pile foundation hole casing 11, and the two cross bars 7 are arranged as axially symmetrically as possible along the radial direction of the pile foundation hole casing 11. Subsequently, the worker rotates the external locking nut 8, and the external locking nuts 8 at both ends of the cross bar 7 move towards the pile foundation hole casing 11 until the external locking nuts 8 are abutted against the outer wall of the pile foundation hole casing 11, thereby fixing the cross bar 7 on the pile foundation hole casing 11. Then, the worker pulls the bottom plate 1 to slide along the axial direction of the cross bar 7 through the push-pull rod 9, so that the part of the lowering rope 12 in the pile foundation hole is as coincident with the central axis of the pile foundation hole as possible. Then, the driving motor 5 is started, and the driving motor 5 drives the guide wheel 3 to rotate clockwise. Since the pressing ring 6 presses the lowering rope 12 in the limiting ring groove 301, Figure 4 the horizontal part of the lowering rope 12 in the figure is pushed to the right under the action of friction, and the underground karst cave detection structure starts to be lowered smoothly.

[0032] When the underground karst cave detection structure is lowered to a suitable position, the driving motor 5 stops working, the lowering rope 12 is stationary, and the underground karst cave detection structure is stationary in the underground karst cave. When it is necessary to translate the underground karst cave detection structure, the worker pushes and pulls the bottom plate 1 through the push-pull rod 9, and the underground karst cave detection structure can be translated together with the bottom plate 1.

[0033] After the detection work is completed, the driving motor 5 is started again, and the driving motor 5 drives the guide wheel 3 to rotate counterclockwise. The horizontal part of the lowering rope 12 in the figure is pushed to the left under the action of friction, so as to lift and recover the underground karst cave detection structure. Finally, the external locking nut 8 is rotated in the reverse direction to release the fixation of the cross bar 7, and the bottom plate 1 and the cross bar 7 are removed from the pile foundation hole casing 11. In addition, during the lowering, detection and lifting processes of the underground karst cave detection structure, the worker can hold the lowering rope 12 to the left of the guide wheel 3 ( Figure 4 in the figure) so as to quickly grasp the lowering rope 12 when the lowering rope 12 slips in the limiting ring groove 301.

[0034] In summary, the device in this embodiment can be fixed at the top of the pile foundation hole casing 11. The lowering rope 12 can be lowered and lifted without workers having to stretch out their upper bodies. The lowering and lifting processes are stable. Moreover, a cross-shaped frame is formed on the pile foundation hole casing 11, which can prevent people from falling into the hole and improve the operation safety. In addition, workers can adjust the position of the underground karst cave detection structure according to the situation in the underground karst cave to obtain better underground karst cave data.

[0035] Embodiment 2

[0036] The difference between this embodiment and Embodiment 1 is that, as Figure 5 shown, in this embodiment, a sliding resistance sleeve is not provided on the outer peripheral wall of the smooth section 702, while a threaded section III 902 is provided on the push rod 9, and two clamping nuts 10 are threadedly connected to the threaded section III 902. Since there is no sliding resistance member between the smooth section 702 and the transverse through hole of the bottom plate 1, the bottom plate 1 can slide easily along the axial direction of the cross bar 7. Workers can make the bottom plate 1 slide by applying a small force to the bottom plate 1 through the push rod 9. After sliding the bottom plate 1 to a suitable position, rotate the clamping nuts 10 so that both clamping nuts 10 are close to the top of the pile foundation hole casing 11, and the two clamping nuts 10 clamp the top of the pile foundation hole casing 11, thereby fixing the position of the push rod 9 and further fixing the position of the bottom plate 1 to facilitate the stable lowering of the underground karst cave detection.

[0037] The above are only the embodiments of the present invention. Specific structures and common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the present invention. The specific implementation manners and the like in the specification can be used to explain the content of the claims.

Claims

1. A device for smoothly lowering an underground cave detection structure, characterized in that: It includes a base plate, on which two mounting plates arranged opposite to each other are fixedly connected, a guide wheel and a clamping wheel are arranged between the two mounting plates, a driving motor for driving the guide wheel to rotate is fixedly installed on one mounting plate, a limiting ring groove for a lowering rope to sink into is provided on the circumference of the guide wheel, a clamping ring matching the limiting ring groove is provided on the circumference of the clamping wheel, and the distance between the clamping ring and the bottom wall of the limiting ring groove is smaller than the outer diameter of the lowering rope.

2. The device for smoothly lowering an underground cave detection structure according to claim 1, characterized in that: At least two transverse through holes are formed on the bottom plate, and a cross bar passes through each transverse through hole.

3. The device for smoothly lowering an underground cave detection structure according to claim 2, characterized in that: The crossbar is axially provided with a threaded section I, a smooth section and a threaded section II. The smooth section is clearance-matched with the transverse through hole. The outer diameters of the threaded section I and the threaded section II are both smaller than the smooth section. The threaded section I and the threaded section II are both threadedly connected with an external locking nut.

4. The device for smoothly lowering an underground cave detection structure according to claim 3 is characterized in that: The outer peripheral wall of the smooth section is fixedly connected with a sliding resistance sleeve.

5. The device for smoothly lowering an underground cave detection structure according to claim 3 or 4, characterized in that: The bottom plate is detachably connected with a push-pull rod arranged horizontally.

6. The device for smoothly lowering an underground cave detection structure according to claim 5, characterized in that: The push-pull rod is provided with a threaded section III, and two clamping nuts are threadedly connected on the threaded section III.

7. The device for smoothly lowering an underground cave detection structure according to claim 5, characterized in that: A threaded blind hole is provided on the bottom plate, and a threaded section IV is provided at one end of the push-pull rod close to the bottom plate to match the threaded blind hole.

8. The device for smoothly lowering an underground cave detection structure according to claim 1, characterized in that: The clamping ring is a rubber ring.

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