A hole wall flatness detection device for collapsible loess pile hole

Abstract

The utility model discloses a kind of hole wall flatness detection devices for collapsible loess pile foundation hole, including support frame;The lower portion of support frame is equipped with several support piles, the upper portion of support pile is equipped with U-shaped frame, the inside rotation of support frame is equipped with linkage gear ring, linkage gear ring is connected with detection structure;The utility model, by opening multistage lifting cylinder, pulley and displacement sensor can be lowered into pile foundation hole, at this time, opening the electric push rod around can drive pulley to adhere to pile foundation hole inner wall, subsequently opening motor to control pulley along the circumferential motion of pile foundation hole wall in positive and negative direction, when pile foundation hole wall is uneven, it can make telescopic end of displacement sensor to retract and detect displacement change, it is convenient to detect base hole hole wall flatness, compared with single detection mode of simply vertical drop can improve the detection range and accuracy of pile foundation hole wall, so that more comprehensive detection of the flatness of pile foundation hole wall.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation hole detection technology, specifically a hole wall flatness detection device for collapsible loess pile foundation holes. Background Technology

[0002] Testing the flatness of the borehole walls in collapsible loess areas is an important technical means to ensure the quality of pile foundation construction. Because collapsible loess is prone to softening and disintegration when exposed to water, the borehole walls are prone to collapse, spalling, or local deformation after drilling. By testing the flatness of the borehole walls, the geometry and stability of the borehole walls can be assessed, providing a reliable basis for subsequent construction.

[0003] Chinese Patent Publication No. CN222188303U discloses a device for detecting the flatness of the pile foundation hole wall, including a support, a limiting frame, a limiting device, and a detection device. The support includes a bearing plate and legs. The legs are distributed on the lower surface of the bearing plate, and the limiting frame is provided on the upper surface of the bearing plate. The limiting device is provided on the limiting frame and passes through the limiting frame and the bearing plate. The detection device is provided at the lower end of the limiting device. This utility model is highly practical and very convenient to use. The bearing plate and the limiting tube are designed to allow the detection device to enter the pile foundation hole vertically, avoiding the detection device from shaking inside the pile foundation hole and affecting the detection results. By adjusting the angle of each support rod on the support plate, it can adapt to the detection of pile foundation holes of different diameters. By changing the angle of the detection rod, the pressure sensor on the support rod is squeezed, which facilitates the detection of the flatness of the pile foundation hole wall.

[0004] In the aforementioned prior art, the probe rod and roller can be controlled to move vertically along the inner wall of the pile hole. When encountering unevenness in the hole wall, the probe rod angle changes and squeezes the pressure sensor to detect the flatness of the hole wall. However, this device can only control the probe rod and pressure sensor to move vertically, and the detection position is relatively singular. It cannot fully cover the hole wall and is easy to miss defects in other directions of the hole wall. Therefore, a hole wall flatness detection device for collapsible loess pile foundation holes is needed to meet people's needs. Utility Model Content

[0005] The purpose of this invention is to provide a device for detecting the flatness of the borehole wall in collapsible loess pile foundations, in order to solve the problem in the background art that the device for detecting the flatness of the borehole wall can only control the vertical movement of the probe rod and the pressure sensor, the detection position is relatively simple, and it is easy to miss defects in other directions of the borehole wall.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for detecting the flatness of the hole wall in a pile foundation of collapsible loess, comprising a support frame; several support piles are installed below the support frame, a U-shaped frame is installed above the support piles, a linkage gear ring is rotatably installed inside the support frame, a detection structure is connected to the linkage gear ring, a multi-stage lifting cylinder is installed above the U-shaped frame, an adjustment structure is connected to the multi-stage lifting cylinder, and a splicing structure is connected to the adjustment structure.

[0007] Preferably, the detection structure includes a splicing rod, which is movably installed inside the linkage gear ring. One end of the splicing rod is detachably mounted with a connecting seat. Several electric push rods are mounted on the connecting seat. A connecting plate is mounted on the telescopic end of the electric push rod. Several guide rods are slidably mounted inside the connecting plate. One end of the guide rod is mounted with a mounting seat. A pulley is rotatably mounted on the mounting seat. A displacement sensor is mounted on one side of the connecting plate. The detection end of the displacement sensor passes through the connecting plate and is mounted on one side of the mounting seat.

[0008] Preferably, a spring is slidably sleeved on the guide rod, with both ends of the spring installed between the connecting plate and the mounting base, and a stop block installed at one end of the guide rod.

[0009] Preferably, the adjustment structure includes a connecting sleeve, which is rotatably fitted onto the telescopic end of the multi-stage lifting cylinder. The connecting sleeve is detachably mounted on the splicing rod. A mounting frame is installed on one side of the U-shaped frame, and a motor is mounted on the mounting frame. A linkage gear is installed at the output end of the motor, and the linkage gear meshes with the linkage gear ring.

[0010] Preferably, the splicing rod has a vertical groove inside, and a guide slider is slidably installed in the vertical groove. The guide slider is installed on the inner wall of the linkage gear ring.

[0011] Preferably, the splicing structure includes two plug-in blocks, which are respectively installed on one side of the splicing rod and the connecting seat. The splicing rod and the connecting sleeve are both provided with plug-in grooves. The two plug-in blocks are respectively movably installed in the corresponding plug-in grooves. The splicing rod, the connecting sleeve and the two plug-in blocks are all provided with mounting holes. The same fixing bolt is inserted into the two mounting holes on the same side. One end of the fixing bolt is threaded with a nut.

[0012] Preferably, both sides of the U-shaped frame are equipped with adjusting cylinders, and the telescopic ends of the two adjusting cylinders are equipped with positioning frames. The two positioning frames are slidably installed inside the U-shaped frame, and positioning grooves are opened on both sides of the splicing rod. The two positioning frames are respectively adapted to the two positioning grooves.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In use, the support frame can be erected above the pile hole of collapsible loess. By opening the multi-stage lifting cylinder, the pulley and displacement sensor can be lowered into the pile hole. At this time, the electric push rods around the perimeter can drive the pulley to fit against the inner wall of the pile hole. Then, the motor is turned on to control the pulley to move in a forward and reverse circular motion along the pile hole wall. When the pile hole wall is uneven, the pulley and the mounting base will be squeezed, causing the telescopic end of the displacement sensor to extend and retract, thereby detecting the displacement change. This facilitates the detection of the flatness of the pile hole wall. Furthermore, by adopting a composite motion mode of lifting and rotating the displacement sensor in both directions, compared with the single detection method of simply vertical descent, the detection range and accuracy of the pile hole wall can be improved, so as to more comprehensively detect the flatness of the pile hole wall.

[0015] (2) By controlling the splicing rod to descend, the positioning frame can be inserted into the positioning slot to provide support for the splicing rod. Then, the fixing bolts inside the connecting sleeve and splicing rod are removed and the connecting sleeve is controlled to rise. Another splicing rod can then be inserted into the insertion block of the current splicing rod. Then, the connecting sleeve is placed on the insertion block where the splicing rod is installed. The two ends of the splicing rod are then fixed again with fixing bolts. This allows the splicing operation of the splicing rod to be realized. This process can be repeated to achieve the splicing of multiple splicing rods, allowing the displacement sensor to descend to a deeper position for detection. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a borehole wall flatness detection device for collapsible loess pile foundations proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the linkage gear ring structure of a hole wall flatness detection device for collapsible loess pile foundation holes proposed in this utility model.

[0018] Figure 3 This is a cross-sectional structural diagram of a borehole wall flatness detection device for collapsible loess pile foundations proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the connecting seat structure of a hole wall flatness detection device for collapsible loess pile foundation holes proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of the displacement sensor connection structure of a borehole wall flatness detection device for collapsible loess pile foundation holes proposed in this utility model.

[0021] Figure 6 This is an exploded view of the splicing rod structure of a borehole wall flatness detection device for collapsible loess pile foundations proposed in this utility model.

[0022] In the diagram: 100, support frame; 101, support stake; 102, U-shaped frame; 200, linkage gear ring; 201, splicing rod; 202, connecting seat; 203, electric push rod; 204, connecting plate; 205, guide rod; 206, mounting seat; 207, pulley; 208, displacement sensor; 209, spring; 210, stop block; 300, multi-stage lifting cylinder; 301, connecting sleeve; 302, mounting bracket; 303, motor; 304, linkage gear; 305, vertical slide; 306, guide slider; 400, plug-in block; 401, plug-in groove; 402, mounting hole; 403, fixing bolt; 404, nut; 405, adjusting cylinder; 406, positioning frame; 407, positioning groove. Detailed Implementation

[0023] 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.

[0024] Example 1: Please refer to Figure 1-6 This utility model provides a technical solution: a device for detecting the flatness of the borehole wall in collapsible loess pile foundations, including a support frame 100; several support piles 101 are installed below the support frame 100, and a U-shaped frame 102 is installed above the support piles 101; a linkage gear ring 200 is rotatably installed inside the support frame 100, and a detection structure is connected to the linkage gear ring 200. The detection structure is used to detect the flatness of the inner wall of the pile foundation borehole; a multi-stage lifting cylinder 300 is installed above the U-shaped frame 102, and an adjustment structure is connected to the multi-stage lifting cylinder 300. The adjustment structure can be used to adjust the descent depth of the detection structure and control the rotation detection of the detection structure; a splicing structure is connected to the adjustment structure, which can be used to allow the detection structure to descend to a deeper position in the pile foundation borehole.

[0025] Furthermore, the detection structure includes a splicing rod 201, which is movably installed inside the linkage gear ring 200. A connecting seat 202 is detachably installed at one end of the splicing rod 201. Several electric push rods 203 are mounted on the connecting seat 202. A connecting plate 204 is installed at the telescopic end of each electric push rod 203. Several guide rods 205 are slidably installed inside the connecting plate 204. A mounting base 206 is installed at one end of each guide rod 205. A pulley 207 is rotatably mounted on the mounting base 206. A displacement sensor 2 is installed on one side of the connecting plate 204. 08. The detection end of the displacement sensor 208 passes through the connecting plate 204 and is installed on one side of the mounting base 206. The electric push rods 203 around the perimeter are opened, causing their extension and retraction ends to drive the pulley 207 to contact the inner wall of the pile hole. If the pile hole wall is not flat, the pulley 207 will be squeezed by the protrusion of the hole wall and drive the mounting base 206 to move. When the mounting base 206 moves, it will drive the detection end of the displacement sensor 208 to extend and retract, so that the displacement sensor 208 can detect the displacement change and transmit the change signal to the external receiver to facilitate the detection of the flatness of the pile hole wall.

[0026] Furthermore, a spring 209 is slidably sleeved on the guide rod 205. The two ends of the spring 209 are respectively installed between the connecting plate 204 and the mounting base 206. A stop block 210 is installed on one end of the guide rod 205. When the mounting base 206 moves, it will squeeze the spring 209. Under the elastic force of the spring 209, the fit between the pulley 207 and the pile hole wall can be improved. The stop block 210 can prevent the guide rod 205 from coming loose from the connecting plate 204.

[0027] Furthermore, the adjustment structure includes a connecting sleeve 301, which is rotatably mounted on the telescopic end of the multi-stage lifting cylinder 300. The connecting sleeve 301 is detachably mounted on the splicing rod 201. A mounting bracket 302 is installed on one side of the U-shaped frame 102, and a motor 303 is installed on the mounting bracket 302. A linkage gear 304 is installed at the output end of the motor 303. The linkage gear 304 meshes with the linkage gear ring 200. When the motor 303 is turned on, it drives the linkage gear 304 to rotate. When the linkage gear 304 rotates, it can drive the linkage gear ring 200 to rotate within the support frame 100 through meshing with it. This causes the linkage gear ring 200 to drive the splicing rod 201 to rotate through the guide slider 306 and the vertical slide groove 305.

[0028] Furthermore, a vertical groove 305 is provided inside the splicing rod 201, and a guide slider 306 is slidably installed in the vertical groove 305. The guide slider 306 is installed on the inner wall of the linkage gear ring 200. When the linkage gear ring 200 rotates, it can drive the splicing rod 201 to rotate through the guide slider 306 and the vertical groove 305. When the splicing rod 201 descends, it will slide on the guide slider 306 through the vertical groove 305.

[0029] Example 2: As Figure 1-6 To allow the pulley 207 and displacement sensor 208 to descend deeper into the pile hole, a splicing structure is arranged. This splicing structure includes two insertion blocks 400, which are respectively installed on one side of the splicing rod 201 and the connecting seat 202. Both the splicing rod 201 and the connecting sleeve 301 have insertion slots 401 inside. The two insertion blocks 400 are movably installed in their respective insertion slots 401. The splicing rod 201, the connecting sleeve 301, and the two insertion blocks 400 all have mounting holes 402 inside. The same fixing bolt 403 is inserted into the two mounting holes 402 on the same side. One end of the fixing bolt 403 is threaded with a nut 404. Adjusting cylinders 405 are installed on both sides of the U-shaped frame 102. Positioning frames 406 are installed on the telescopic ends of both adjusting cylinders 405. All 06 are slidably installed inside the U-shaped frame 102. Positioning slots 407 are provided on both sides of the splicing rod 201. The two positioning frames 406 are respectively adapted to the two positioning slots 407. First, control the splicing rod 201 to continue to descend so that the positioning slots 407 correspond to the positioning frames 406. At this time, the adjusting cylinder 405 is turned on to drive the positioning frames 406 to be inserted into the positioning slots 407. Then, the nut 404 in the connecting sleeve 301 can be unscrewed and the fixing bolt 403 can be pulled out. Then, control the connecting sleeve 301 to rise. Take another splicing rod 201 and put its insertion slot 401 on the insertion block 400 of the lower splicing rod 201. Then, insert the fixing bolt 403 into the corresponding mounting hole 402 and tighten the nut 404. Repeat this process to realize the splicing of multiple splicing rods 201. The other features are the same as in embodiment 1.

[0030] The working principle is as follows: During use, the support frame 100 is erected above the pile hole in the collapsible loess, and the multi-stage lifting cylinder 300 is positioned at the center of the pile hole. The support pile 101 is inserted into the ground for support. By activating the multi-stage lifting cylinder 300, its telescopic end can lower the connecting sleeve 301, which in turn lowers the splicing rod 201 and the connecting seat 202. During the descent of the splicing rod 201, it slides on the guide slider 306 via the vertical slide groove 305, which can lower the electric push rod 20... 3. The pulley 207 descends into the pile hole, and then the electric push rods 203 around the perimeter are simultaneously activated, causing their extension ends to drive the pulley 207 to contact the inner wall of the pile hole. By controlling the extension and retraction of the electric push rods 203, it can be adapted to pile holes of different sizes. At this time, the motor 303 can be turned on to drive the linkage gear 304 to rotate forward and backward, so that the linkage gear 304, through meshing with the linkage gear ring 200, drives it to rotate forward and backward within the support frame 100, so that the linkage gear ring 200 passes through the guide... The slider 306 and the vertical slide 305 drive the splicing rod 201 to rotate. When the splicing rod 201 rotates, it can drive the connecting sleeve 301 to rotate at the telescopic end of the multi-stage lifting cylinder 300. At the same time, the splicing rod 201 will drive the connecting seat 202 to rotate, so that the pulley 207 will move in a circle along the inner wall of the pile hole. If the pile hole wall is uneven during the process, the moving pulley 207 will be squeezed by the protrusion of the hole wall, which will drive the mounting seat 206 to move. The mounting seat 206 will squeeze the spring 209 and drive the guide rod 205 to slide horizontally in the connecting plate 204. When the mounting seat 206 moves, it will drive the detection end of the displacement sensor 208 to extend and retract, so that the displacement sensor 208 can detect the displacement change and transmit the change signal to the external receiver, so that the staff can judge the flatness of the pile hole wall based on the displacement. After the current position is detected, the height of the pulley 207 can be controlled by the multi-stage lifting cylinder 300 and the operation can be repeated to more comprehensively detect the inner wall of the pile hole.

[0031] When the descent depth of pulley 207 is insufficient, the splicing rod 201 can be continuously lowered until the positioning groove 407 aligns with the positioning frame 406. At this point, the adjusting cylinder 405 is activated to drive the positioning frame 406 into the positioning groove 407. The positioning frame 406 can then support the splicing rod 201. The nut 404 inside the connecting sleeve 301 can then be unscrewed, and the fixing bolt 403 can be removed to release the connection restriction between the connecting sleeve 301 and the splicing rod 201. Subsequently, the connecting sleeve... 301 rises, and another splicing rod 201 is taken. The insertion slot 401 on the other splicing rod 201 is fitted onto the insertion block 400 of the lower splicing rod 201. Then, a fixing bolt 403 is inserted into the corresponding mounting hole 402 and the nut 404 is tightened. When the two splicing rods 201 are spliced, their vertical sliding grooves 305 will be connected to each other so that they can be spliced ​​repeatedly. In this way, multiple splicing rods 201 can be spliced ​​and used, so that the pulley 207 can descend to a deeper position.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. The circuits, electronic components and modules involved in the present invention are all prior art and can be fully implemented by those skilled in the art, so there is no need to elaborate. The content protected by the present invention does not involve improvements to software and methods.

Claims

1. A device for detecting the flatness of the borehole wall in collapsible loess pile foundations, comprising a support frame (100); characterized in that: Several support stakes (101) are installed below the support frame (100), and a U-shaped frame (102) is installed above the support stakes (101). A linkage gear ring (200) is rotatably installed inside the support frame (100), and a detection structure is connected to the linkage gear ring (200). A multi-stage lifting cylinder (300) is installed above the U-shaped frame (102), and an adjustment structure is connected to the multi-stage lifting cylinder (300). A splicing structure is connected to the adjustment structure.

2. The device for detecting the flatness of the borehole wall in collapsible loess pile foundations according to claim 1, characterized in that: The detection structure includes a splicing rod (201), which is movably installed inside the linkage gear ring (200). One end of the splicing rod (201) is detachably installed with a connecting seat (202). Several electric push rods (203) are installed on the connecting seat (202). A connecting plate (204) is installed on the telescopic end of the electric push rod (203). Several guide rods (205) are slidably installed inside the connecting plate (204). A mounting seat (206) is installed on one end of the guide rod (205). A pulley (207) is rotatably installed on the mounting seat (206). A displacement sensor (208) is installed on one side of the connecting plate (204). The detection end of the displacement sensor (208) passes through the connecting plate (204) and is installed on one side of the mounting seat (206).

3. The device for detecting the flatness of the borehole wall in collapsible loess pile foundations according to claim 2, characterized in that: A spring (209) is slidably sleeved on the guide rod (205). The two ends of the spring (209) are respectively installed between the connecting plate (204) and the mounting base (206). A stop block (210) is installed on one end of the guide rod (205).

4. The device for detecting the flatness of the borehole wall in collapsible loess pile foundations according to claim 1, characterized in that: The adjustment structure includes a connecting sleeve (301), which is rotatably sleeved on the telescopic end of the multi-stage lifting cylinder (300). The connecting sleeve (301) is detachably installed on the splicing rod (201). A mounting bracket (302) is installed on one side of the U-shaped frame (102). A motor (303) is installed on the mounting bracket (302). A linkage gear (304) is installed at the output end of the motor (303). The linkage gear (304) meshes with the linkage gear ring (200).

5. The device for detecting the flatness of the borehole wall in collapsible loess pile foundations according to claim 2, characterized in that: The splicing rod (201) has a vertical groove (305) inside, and a guide slider (306) is slidably installed in the vertical groove (305). The guide slider (306) is installed on the inner wall of the linkage gear ring (200).

6. The device for detecting the flatness of the borehole wall in collapsible loess pile foundations according to claim 1, characterized in that: The splicing structure includes two plug-in blocks (400), which are respectively installed on one side of the splicing rod (201) and the connecting seat (202). The splicing rod (201) and the connecting sleeve (301) are both provided with plug-in grooves (401). The two plug-in blocks (400) are respectively movably installed in the corresponding plug-in grooves (401). The splicing rod (201), the connecting sleeve (301) and the two plug-in blocks (400) are all provided with mounting holes (402). The same fixing bolt (403) is inserted into the two mounting holes (402) on the same side. A nut (404) is threaded onto one end of the fixing bolt (403).

7. The device for detecting the flatness of the borehole wall in collapsible loess pile foundations according to claim 1, characterized in that: Adjusting cylinders (405) are installed on both sides of the U-shaped frame (102). Positioning frames (406) are installed on the telescopic ends of the two adjusting cylinders (405). The two positioning frames (406) are slidably installed inside the U-shaped frame (102). Positioning grooves (407) are opened on both sides of the splicing rod (201). The two positioning frames (406) are respectively adapted to the two positioning grooves (407).

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