An adjustable diameter aperture detection device

Abstract

The utility model relates to the technical field of pile hole diameter detection technology, specifically discloses a diameter detection device of adjustable diameter, including variable diameter mechanism and lower mechanism. Variable diameter mechanism is composed of control rotary lever, support framework sleeve pipe and spring sleeve pipe, adjusts the extension length of spring sleeve pipe through rotary control rotary lever, further changes the unrolling diameter of adjustable crimped steel sheet connected with it, realizes one machine adapts to multiple hole diameters. Lower mechanism is placed to the hole through the measurement steel cable, and the number of turns of control rotary lever is recorded in combination with gear reading table, can accurately measure the hole diameter change at different depths. The device bottom is equipped with the visual transparent residue taking cylinder with scale, can collect and quantify the hole bottom residue simultaneously in the detection process. The present application solves the problem of low efficiency of traditional method needing to make special testing tool for different hole diameters, realizes that the hole diameter quantitative detection and the residue sampling are carried out simultaneously, improves the efficiency and accuracy of the hole quality detection under the soft geological condition.

Description

Technical Field

[0001] This utility model relates to the field of pile hole diameter detection technology, and in particular to an adjustable diameter hole diameter detection device. Background Technology

[0002] For bored piles or diaphragm walls that use mud slurry for wall protection, the diameter of the entire borehole section needs to be inspected after the hole and trench are formed.

[0003] Dredging and grouting piles in areas with weak geological conditions presents significant challenges in hole formation, resulting in poor quality and difficulty in monitoring. After the pile driver completes the drilling and before inspection, key technical indicators such as the hole diameter must be checked. Only after verification that these indicators meet the specifications and construction plan requirements can the next step proceed. However, the lack of simple, effective, easy-to-operate, and intuitive inspection tools hinders effective measurement and control of the hole diameter, significantly impacting pile quality, the proportion of Class I piles, and ultimately, project excellence.

[0004] During the inspection of the aperture, the detection accuracy is usually at the centimeter level, and the aperture size can be within ±50mm.

[0005] In existing technologies, the measuring tools for measuring borehole diameter are generally fabricated on-site according to the current borehole diameter: a ring is made of steel bars with a diameter of not less than 12mm, and the diameter of this ring is the same as the current borehole diameter. Then, a steel rope is used to connect the ring, and the ring is placed to the bottom of the borehole to check whether the borehole diameter of the entire depth section reaches the pile diameter designed in the drawings and whether there is any collapse or diameter reduction.

[0006] However, this measuring tool can only be used for holes of one diameter. To measure holes of different diameters, measuring tools of different sizes must be made, which reduces efficiency.

[0007] Therefore, an adjustable diameter aperture detection device is proposed. Summary of the Invention

[0008] The purpose of this invention is to provide an adjustable diameter aperture detection device to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides an adjustable diameter aperture detection device, comprising: The variable diameter mechanism includes a control screw and a support frame sleeve. The lower part of the control screw is rotatably connected to the upper inner cavity of the support frame sleeve. Spring sleeves are installed in the inner cavities on both sides of the lower part of the support frame sleeve. The spring sleeves are elastically connected to the bottom of the control screw. The length of the part of the spring sleeve outside the support frame sleeve is adjusted by the control screw. The lowering mechanism includes an adjustable coiled steel plate and a measuring steel rope. The adjustable coiled steel plate is installed at the end of the spring sleeve away from the supporting frame sleeve, and the bottom end of the measuring steel rope is connected to the top end of the supporting frame sleeve.

[0010] Furthermore, the number of adjustable coiled steel plates is one, and the inner walls of both ends of the adjustable coiled steel plates are respectively connected to the opposite ends of two spring sleeves, and the supporting frame sleeve is cross-shaped.

[0011] Furthermore, the bottom end of the measuring steel rope is welded and fixed to the top end of the supporting frame sleeve.

[0012] Furthermore, the measuring steel rope is used to record the hole depth position when the hole diameter changes, and a gear reading meter is installed on the top of the control lever to record the number of rotations of the control lever.

[0013] Furthermore, a control handle is also installed on the top of the control lever, and one end of the control handle is threadedly connected to the control lever.

[0014] Furthermore, the gear reading gauge is detachably mounted on the outer wall of the control lever by bolts, and the gear reading gauge and the meshing gear provided on the control lever are mechanically connected.

[0015] Furthermore, the bottom end of the control lever is welded or bolted to one end of the control steel rope. An adjusting spring is provided inside the spring sleeve. One end of the adjusting spring is welded and fixed to the fixing steel plate in the middle inner cavity of the support frame sleeve. One end of the spring sleeve is welded and fixed to the adjustable coiled steel plate through the connecting plate. The other end of the control steel rope and the other end of the adjusting spring are both welded and fixed to the connecting plate.

[0016] Furthermore, a rotary brake valve is installed on the top of the support frame sleeve, and the rotary brake valve is configured as two valves symmetrically distributed about the support frame sleeve.

[0017] Furthermore, a graduated, transparent slag-removing cylinder is welded and fixedly connected to the bottom end of the supporting frame sleeve, and a one-way movable flap is movably connected to the bottom of the graduated, transparent slag-removing cylinder.

[0018] Compared with the prior art, the beneficial effects of this utility model are: This device achieves continuous and precise control over the unfolding diameter of the adjustable coiled steel plate through the precise cooperation of the control rod and spring sleeve. This allows a single device to quickly adapt to the testing requirements of different designed hole diameters, completely overcoming the inefficiency of traditional methods that require the re-fabrication of special steel rings for each different hole diameter. This greatly improves the flexibility and adaptability of the testing work. Simultaneously, the gear reading meter integrated into the device accurately records the number of rotations of the control rod and converts it into the radial displacement of the adjustable coiled steel plate. Combined with the hole depth position recorded by the measuring steel rope, it can intuitively and quantitatively reflect the hole diameter value at any position within the hole depth range. The testing accuracy fully meets the engineering requirement of ±50mm, effectively solving the drawbacks of traditional methods that rely on manual judgment and cannot quantify testing data.

[0019] Furthermore, the addition of a graduated, transparent slag-collecting cylinder at the bottom of the device allows for simultaneous collection of sediment from the bottom of the borehole during the testing process. The thickness of the sediment can be visually assessed through the graduations, enabling simultaneous borehole diameter testing and sediment sampling. This simplifies the process and provides direct evidence for determining whether borehole collapse or diameter reduction has occurred. The device is simple in structure, easy to operate, and highly integrated, significantly improving the efficiency and reliability of borehole quality monitoring under soft geological conditions. It has significant practical value in ensuring the final quality of drilled cast-in-place piles and achieving project excellence. Attached Figure Description

[0020] Figure 1 This is a front view of the overall internal structure of this utility model; Figure 2 for Figure 1 Enlarged diagram of part A in the diagram; Figure 3 for Figure 1 Enlarged diagram of part B in the diagram; Figure 4 for Figure 1 Enlarged diagram of part C in the diagram; Figure 5 for Figure 1 Enlarged schematic diagram of part D in the diagram.

[0021] In the diagram: 1. Control lever; 2. Gear reading gauge; 3. Control handle; 4. Lever brake valve; 5. Support frame sleeve; 6. Spring sleeve; 7. Adjusting spring; 8. Control steel rope; 9. Fixed steel plate; 10. Adjustable coiled steel plate; 11. Connecting plate; 12. Measuring steel rope; 13. Transparent slag removal cylinder with graduations; 14. One-way movable flap. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 5 In this embodiment of the invention, an adjustable diameter aperture detection device includes a diameter-changing mechanism and a lowering mechanism. The diameter-changing mechanism includes a control rod 1 and a support frame sleeve 5. The lower part of the control rod 1 is rotatably connected to the upper inner cavity of the support frame sleeve 5 via a bearing. The control rod 1 and the support frame sleeve 5 can be made of 45# steel or stainless steel to ensure strength and corrosion resistance. Spring sleeves 6 are installed in the inner cavities on both sides of the lower part of the support frame sleeve 5. The spring sleeves 6 are elastically connected to the bottom of the control rod 1. The length of the portion of the spring sleeve 6 outside the support frame sleeve 5 is adjusted by the control rod 1. The lowering mechanism includes an adjustable coiled steel plate 10 and a measuring steel rope 12. The adjustable coiled steel plate 10 is installed at the end of the spring sleeve 6 away from the supporting frame sleeve 5. The adjustable coiled steel plate 10 is made of spring steel (such as 65Mn) with good elasticity and memory to ensure that it can be repeatedly bent and deformed and recover, and can maintain the set unfolded diameter after the external force is removed. The bottom end of the measuring steel rope 12 is connected to the top end of the supporting frame sleeve 5.

[0024] Please see Figure 1 The adjustable coiled steel plate 10 is set in a number of one. The inner walls of both ends of the adjustable coiled steel plate 10 are respectively connected to the opposite ends of two spring sleeves 6. The supporting frame sleeve 5 is cross-shaped, and the spring sleeves 6 are set on the same horizontal straight line.

[0025] Please see Figure 1 , Figure 2 The bottom end of the measuring steel rope 12 is welded and fixed to the top end of the supporting frame sleeve 5.

[0026] The measuring steel rope 12 is used to record the hole depth position when the hole diameter changes. A gear reading meter 2 is installed on the top of the control rod 1, and the gear reading meter 2 is used to record the number of rotations of the control rod 1. The correspondence between the reading of the gear reading meter 2 and the unfolded diameter of the adjustable coiled steel plate 10 is pre-calibrated experimentally. A control handle 3 is also installed on the top of the control rod 1, and one end of the control handle 3 is threadedly connected to the control rod 1.

[0027] Preferably, the gear reading meter 2 is detachably mounted on the outer wall of the control lever 1 by bolts, and the gear reading meter 2 and the meshing gear provided on the control lever 1 are mechanically connected.

[0028] Please see Figure 1 , Figure 3 , Figure 4 The bottom end of the control lever 1 is welded or bolted to one end of the control steel rope 8. An adjusting spring 7 is installed inside the spring sleeve 6. The control steel rope 8 is positioned within the adjusting spring 7. One end of the adjusting spring 7 is welded to a fixed steel plate 9 located in the middle cavity of the supporting frame sleeve 5. One end of the spring sleeve 6 is welded to an adjustable coiled steel plate 10 via a connecting plate 11. The other ends of the control steel rope 8 and the adjusting spring 7 are both welded to the connecting plate 11. A through hole is provided in the middle of the fixed steel plate 9 for the control steel rope 8 to pass through. Rotating the control lever 1 causes the control steel rope 8 to extend or retract, which in turn, in conjunction with the adjusting spring 7, controls the extension or retraction of the spring sleeve 6, thereby adjusting the diameter of the adjustable coiled steel plate 10.

[0029] Please see Figure 1 The top of the support frame sleeve 5 is equipped with a rotary rod brake valve 4. The rotary rod brake valve 4 is configured as two valves symmetrically distributed about the support frame sleeve 5. When the adjustable coiled steel plate 10 is adjusted to the required diameter, the rotary rod brake valve 4 is used to brake and keep the diameter unchanged.

[0030] Please see Figure 1 , Figure 5 The bottom end of the supporting frame sleeve 5 is welded and fixedly connected to a graduated transparent slag sampling tube 13. The graduated transparent slag sampling tube 13 is made of high-strength transparent engineering plastic (such as polycarbonate PC) or tempered glass. The bottom of the graduated transparent slag sampling tube 13 is movably connected to a one-way movable flap 14. The one-way movable flap 14 is made of wear-resistant rubber or hinged metal flap (such as stainless steel). It can open and close in one direction through a rotating shaft or its own elasticity to facilitate sampling.

[0031] The working principle of this utility model is as follows: The operator first drives the control rod 1 to rotate by rotating the control handle 3. The control rod 1 pulls the connecting plate inside the spring sleeve 6 through the control steel rope 8 connected to the bottom, overcoming the elastic force of the adjusting spring 7 and causing the spring sleeve 6 to extend from the support frame sleeve 5. This telescopic movement is directly transmitted to the adjustable coiled steel plate 10 connected to the end of the spring sleeve 6, causing it to deform radially and unfold. The number of rotations of the control rod is accurately recorded by the gear reading meter 2 installed on the top of the control rod 1, and the real-time unfolded diameter of the adjustable coiled steel plate 10 can be calculated. When adjusted to the designed aperture value, the control rod 1 is locked by two symmetrically arranged rod brake valves 4 to keep the detected diameter stable. Then, the device is lowered into the hole by measuring steel rope 12. During the lowering process, if the aperture at a certain depth is smaller than the set value, the adjustable coiled steel plate 10 will be squeezed and contracted; if the aperture is larger than the set value, it will remain unfolded under the action of the adjusting spring 7. By measuring the depth mark on the steel rope 12, the location and range of the abnormal aperture section can be accurately located.

[0032] During the lowering of the device, the graduated and transparent slag-collecting cylinder 13 at the bottom descends accordingly. When the bottom of the slag-collecting cylinder contacts the sediment at the bottom of the borehole, the one-way movable flap 14 at the bottom of the cylinder opens under its own weight, allowing the sediment to enter the cylinder. When the device is raised, the one-way movable flap 14 automatically closes under external medium pressure, retaining the collected sediment sample inside the cylinder. Through the transparent wall and graduated markings on the slag-collecting cylinder, operators can directly observe and read the thickness and properties of the sediment sample, providing a direct basis for judging the condition of the sediment at the bottom of the borehole.

[0033] The entire device utilizes the coordinated action of the adjusting spring 7 and the control steel rope 8 to give the adjustable coiled steel plate 10 a certain degree of radial flexibility. When encountering local borehole diameter changes during the testing process, this structure can adaptively make slight adjustments, ensuring testing accuracy while preventing device jamming. This design is particularly suitable for borehole testing scenarios in soft geological conditions prone to diameter reduction and borehole collapse, enabling simultaneous quantitative borehole diameter detection and sediment condition assessment.

Claims

1. An adjustable diameter aperture detection device, characterized in that, include: The variable diameter mechanism includes a control rod (1) and a support frame sleeve (5). The lower part of the control rod (1) is rotatably connected to the upper inner cavity of the support frame sleeve (5). Spring sleeves (6) are installed in the inner cavities on both sides of the lower part of the support frame sleeve (5). The spring sleeves (6) are elastically connected to the bottom of the control rod (1). The length of the part of the spring sleeve (6) placed outside the support frame sleeve (5) is adjusted by the control rod (1). The lowering mechanism includes an adjustable coiled steel plate (10) and a measuring steel rope (12), wherein the adjustable coiled steel plate (10) is installed at one end of the spring sleeve (6) away from the supporting frame sleeve (5), and the bottom end of the measuring steel rope (12) is connected to the top end of the supporting frame sleeve (5).

2. The adjustable diameter aperture detection device according to claim 1, characterized in that, The adjustable coiled steel plate (10) is set in a number of one. The inner walls of both ends of the adjustable coiled steel plate (10) are respectively connected to the far ends of two spring sleeves (6). The supporting frame sleeve (5) is cross-shaped.

3. The adjustable diameter aperture detection device according to claim 1, characterized in that, The bottom end of the measuring steel rope (12) is welded and fixed to the top end of the supporting frame sleeve (5).

4. The adjustable diameter aperture detection device according to claim 3, characterized in that, The measuring steel rope (12) is used to record the hole depth position when the hole diameter changes. A gear reading meter (2) is installed on the top of the control lever (1). The gear reading meter (2) is used to record the number of rotations of the control lever (1).

5. The adjustable diameter aperture detection device according to claim 4, characterized in that, The top of the control lever (1) is also equipped with a control handle (3), one end of which is threadedly connected to the control lever (1).

6. The adjustable diameter aperture detection device according to claim 4, characterized in that, The gear reading gauge (2) is detachably mounted on the outer wall of the control lever (1) by bolts, and the gear reading gauge (2) and the meshing gear provided on the control lever (1) are mechanically connected.

7. The adjustable diameter aperture detection device according to claim 4, characterized in that, The bottom end of the control lever (1) is welded or bolted to one end of the control steel rope (8). An adjusting spring (7) is provided inside the spring sleeve (6). One end of the adjusting spring (7) is welded to the fixing steel plate (9) provided in the middle inner cavity of the support frame sleeve (5). One end of the spring sleeve (6) is welded to the adjustable coiled steel plate (10) through the connecting plate (11). The other end of the control steel rope (8) and the other end of the adjusting spring (7) are both welded to the connecting plate (11).

8. The adjustable diameter aperture detection device according to claim 4, characterized in that, A rotary brake valve (4) is installed on the top of the support frame sleeve (5), and the rotary brake valve (4) is configured as two valves symmetrically distributed about the support frame sleeve (5).

9. The adjustable diameter aperture detection device according to claim 1, characterized in that, The bottom end of the support frame sleeve (5) is welded and fixedly connected to a scaled transparent slag removal cylinder (13), and the bottom of the scaled transparent slag removal cylinder (13) is movably connected to a one-way movable flap (14).

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