Cast-in-place concrete pile sediment thickness detection device

Abstract

The invention discloses a cast-in-place concrete pile sediment thickness detection device, and relates to the field of pile foundation construction, the cast-in-place concrete pile sediment thickness detection device comprises a rack, a measuring rope, a measuring needle, a measuring cake, a winding and unwinding mechanism, a guide wheel, a limiting mechanism and a control mechanism; a cavity is formed in the measuring needle, the guide wheel is rotationally installed in the cavity through a rotating shaft, two first channels allowing the measuring rope to penetrate through are formed in the top end of the measuring needle, the cavity in the measuring needle is communicated with the outside through the channels, the measuring cake is arranged at the top end of the measuring needle, and a second channel allowing the measuring rope to penetrate through is formed in the measuring cake. According to the cast-in-place concrete pile sediment thickness detection device, the sediment thickness can be measured through one-time measurement by achieving synchronous falling and lifting of the measuring needle and the measuring disc, the detection steps are simplified, the detection efficiency is improved, the limiting mechanism is automatically switched to the limiting state when the measuring needle makes contact with the bottom of a cast-in-place pile hole, and the part, connected with the measuring disc, of the measuring rope is clamped; errors caused by multiple times of measurement are avoided, and the measurement precision is improved.

Description

Technical Field

[0001] The invention relates to a pile foundation construction technology, and in particular to a device for detecting the thickness of sediment of a concrete cast-in-place pile. Background Art

[0002] In the prior art, the detection of sediment thickness of cast-in-place concrete piles generally relies on a traditional combination of a measuring needle, a measuring rope and a measuring cake. During the detection process, the measuring needle is first connected to the end of the measuring rope and slowly inserted into the pile hole until it touches the bottom of the hole. At this time, the reading on the measuring rope is recorded, and this reading represents the depth of the bottom of the hole. Subsequently, the measuring cake is replaced and connected to the measuring rope, and also slowly inserted into the hole until the measuring cake contacts the top surface of the sediment and stops falling. At this time, the measuring rope reading is recorded again as the depth of the top surface of the sediment. Finally, the sediment thickness is calculated by the difference between the bottom depth of the hole and the depth of the top surface of the sediment.

[0003] Although the above method is widely used in practice, its inherent limitations cannot be ignored. The entire measurement process requires multiple lowering and recording, which is not only time-consuming and reduces the measurement efficiency, but also because this method relies on the difference between two independent measurements to determine the sediment thickness. There are some uncertain factors in this process, such as the elastic deformation of the measuring rope, which can easily interfere with the measurement results and lead to the accumulation of measurement errors, which affects the accuracy of the measurement results to a certain extent. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting the sediment thickness of a bored concrete pile, so as to solve the technical problems in the prior art that when detecting the sediment thickness of a bored concrete pile, the sediment thickness is determined by relying on the difference between two independent measurements, the detection efficiency is low, and the two measurements will lead to the accumulation of errors, thereby reducing the accuracy of the detection.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: a device for detecting the thickness of sediment in a concrete cast-in-place pile, comprising a frame, a measuring rope, a measuring needle, a measuring cake, a winding mechanism, a guide wheel, a limiting mechanism and a control mechanism;

[0006] A cavity is provided inside the measuring needle, and the guide wheel is rotatably installed in the cavity through a rotating shaft. Two first channels for the measuring rope to pass through are provided at the top of the measuring needle, and the channels connect the cavity in the measuring needle with the outside. A measuring cake is provided at the top of the measuring needle, and a second channel for the measuring rope to pass through is provided on the measuring cake.

[0007] The top end of the measuring rope is connected to a winding mechanism for winding or unwinding the measuring rope, the end of the measuring rope away from the winding mechanism passes through the second channel and the two first channels in sequence, and the part of the measuring rope in the cavity bypasses the guide wheel, and the end of the measuring rope away from the winding mechanism is fixedly connected to the measuring cake;

[0008] The limiting mechanism is arranged on the measuring needle, and the limiting mechanism can be switched between a limiting state and a non-limiting state;

[0009] One side of the limiting mechanism is connected to a control mechanism for controlling the limiting mechanism to switch its state. When the limiting mechanism is in a limiting state, the limiting mechanism hinders the movement of the measuring rope relative to one of the first channels. When the limiting mechanism is in a non-limiting state, the limiting mechanism does not hinder the movement of the measuring rope relative to one of the first channels.

[0010] Furthermore, the unwinding mechanism includes a winding roller and a rotating driving member, the upper end of the measuring rope is wound on the winding roller, the two ends of the winding roller are respectively rotatably connected to the frame, the rotating driving member is fixedly installed on the frame, and the output shaft end of the rotating driving member is transmission-connected to one end of the winding roller through a transmission belt.

[0011] Furthermore, the limiting mechanism includes a clamping block, a swing arm, a limiting wheel, a support and an inclined rod. One side of the clamping block is fixedly connected to the inner wall of the cavity on the measuring needle. The part of the measuring rope located in the cavity is between the clamping block and the limiting wheel. The limiting wheel is fixedly installed on one end of the swing arm. The side of the swing arm close to the limiting wheel is rotatably connected to the inner wall of the cavity through a rotating shaft. The end of the swing arm away from the limiting wheel is hinged to the inclined rod, and the bottom end of the inclined rod is hinged to the support. The bottom end of the support is connected to the control mechanism, and the control mechanism can drive the support to move along the height direction of the measuring needle.

[0012] Furthermore, the control mechanism includes an A spring, a trigger head and a control component. A hole groove is opened on the trigger head, and the inner wall of the hole groove is slidably connected to the bottom end of the measuring needle. The A spring is arranged in the hole groove, the top end of the A spring is fixedly connected to the measuring needle, and the bottom end of the A spring is fixedly connected to the inner wall of the hole groove. When the trigger head moves upward along the height direction of the measuring needle relative to the measuring needle, the control component drives the support to move upward along the height direction of the measuring needle.

[0013] Furthermore, the bottom end of the trigger head is configured in a cone shape.

[0014] Furthermore, the control component includes a vertical rod and a limiting member, the top end of the vertical rod is fixedly connected to the support, the bottom end of the vertical rod passes through the measuring needle and is fixedly connected to the inner wall of the hole groove on the trigger head, the outer wall of the bottom end of the vertical rod is slidably connected to the measuring needle, and one side of the vertical rod is connected to the limiting member that can prevent the vertical rod from moving downward relative to the measuring needle along the height direction of the measuring needle.

[0015] Furthermore, the limiting member includes a limit bar, a pawl, a cross bar and a B spring. The length direction of the limit bar is parallel to the length direction of the vertical bar. One side of the limit bar is fixedly connected to the vertical bar, and the other side of the limit bar is provided with a plurality of ratchets matching the pawl at equal intervals along the length direction of the limit bar. The side of the pawl away from the ratchet is fixedly connected to the cross bar, one end of the cross bar away from the pawl passes through the measuring needle, and a boss is provided at the end of the cross bar away from the pawl. The B spring is sleeved on the outside of the cross bar, one end of the B spring is fixedly connected to the cross bar, and the other end of the B spring is fixedly connected to the measuring needle.

[0016] Furthermore, the control component includes a pressure sensor, a pressing member and a telescopic driving member. The pressure sensor is fixedly mounted on the bottom surface of the hole groove, the pressing member is arranged on the top of the pressure sensor, the top of the pressing member is fixedly connected to the measuring needle, the telescopic driving member is arranged inside the measuring needle cavity, the fixed end of the telescopic driving member is fixedly connected to the measuring needle, and the movable end of the telescopic driving member is fixedly connected to the support.

[0017] Furthermore, a sponge is provided on the inner wall of the upper end of the first channel, and a through hole is provided on the sponge for the measuring rope to pass through.

[0018] Furthermore, the transverse cross-section of the second channel is circular, and a plurality of balls are arranged in a circular array around the central axis of the second channel, and the balls are embedded on the inner wall of the second channel.

[0019] Compared with the prior art, the device for detecting the sediment thickness of a concrete bored pile provided by the present invention can measure the sediment thickness in one measurement by realizing the synchronous falling and lifting of the measuring needle and the measuring plate, thereby simplifying the detection steps and improving the detection efficiency. When the measuring needle contacts the bottom of the bored pile hole, the limiting mechanism automatically switches to the limiting state, clamps the part of the measuring rope connected to the measuring plate, avoids the error caused by multiple measurements, and improves the measurement accuracy.

[0020] By setting up the limiting mechanism and the control mechanism, precise control of the clamping timing of the measuring rope is achieved, thereby ensuring that the measuring rope can be effectively clamped during each measurement, improving the measurement accuracy, and by setting up a trigger head, it is ensured that when the trigger head contacts the bottom of the hole, the control mechanism can effectively control the clamping of the measuring rope by the limiting mechanism, further improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall external structure provided by an embodiment of the present invention;

[0023] Figure 2 A first partial cross-sectional structural schematic diagram provided by an embodiment of the present invention;

[0024] Figure 3 The embodiment of the present invention provides Figure 2 A is an enlarged schematic diagram;

[0025] Figure 4 A second partial cross-sectional structural schematic diagram provided by an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the combination of a guide wheel, a limiting mechanism and a measuring rope provided in an embodiment of the present invention;

[0027] Figure 6 The embodiment of the present invention provides Figure 2 The enlarged structural diagram at B in FIG.

[0028] Description of reference numerals:

[0029] 1. Frame; 2. Measuring rope; 3. Measuring needle; 4. Measuring cake; 5. Winding and unwinding mechanism; 51. Winding roller; 52. Rotating drive member; 6. Guide wheel; 7. Limiting mechanism; 71. Clamping block; 72. Swing arm; 73. Limiting wheel; 74. Support; 75. Diagonal rod; 8. Control mechanism; 81. A spring; 82. Trigger head; 83. Vertical rod; 84. Limiting member; 841. Limiting strip; 842. Ratchet; 843. Crossbar; 844. B spring; 85. Pressure sensor; 86. Pressing member; 87. Telescopic drive member; 9. Sponge; 10. Ball bearing. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 , Figure 2 and Figure 4 , a device for detecting the thickness of sediment in a concrete bored pile, comprising a frame 1, a measuring rope 2, a measuring needle 3, a measuring cake 4, a winding mechanism 5, a guide wheel 6, a limiting mechanism 7 and a control mechanism 8;

[0032] A cavity is provided inside the measuring needle 3, and the guide wheel 6 is rotatably installed in the cavity through a rotating shaft. Two first channels for the measuring rope 2 to pass through are provided at the top of the measuring needle 3, and the channels connect the cavity in the measuring needle 3 with the outside. A measuring cake 4 is provided at the top of the measuring needle 3, and a second channel for the measuring rope 2 to pass through is provided on the measuring cake 4;

[0033] The top end of the measuring rope 2 is connected to a winding mechanism 5 for winding or unwinding the measuring rope 2, and the end of the measuring rope 2 away from the winding mechanism 5 passes through the second channel and the two first channels in sequence, and the part of the measuring rope 2 in the cavity bypasses the guide wheel 6, and the end of the measuring rope 2 away from the winding mechanism 5 is fixedly connected to the measuring cake 4;

[0034] The limiting mechanism 7 is arranged on the measuring needle 3, and the limiting mechanism 7 can be switched between a limiting state and a non-limiting state;

[0035] One side of the limiting mechanism 7 is connected to a control mechanism 8 for controlling the limiting mechanism 7 to switch its state. When the limiting mechanism 7 is in a limiting state, the limiting mechanism 7 hinders the movement of the measuring rope 2 relative to one of the first channels. When the limiting mechanism 7 is in a non-limiting state, the limiting mechanism 7 does not hinder the movement of the measuring rope 2 relative to one of the first channels.

[0036] In the existing method of detecting the thickness of the sediment of the concrete bored pile by combining the measuring rope 2 with the measuring needle 3 and the measuring cake 4, the measuring process needs to carry out multiple steps of measuring the bottom depth of the hole, measuring the top depth of the sediment and calculating the sediment thickness. The measuring efficiency is not high, and in the measuring process, since the sediment thickness is obtained by using the difference between the two measurements, the measuring error is increased to a certain extent.

[0037] To this end, the present application connects the measuring rope 2 to the measuring needle 3 and the measuring cake 4. When testing, the measuring rope 2 is unwound by the winding mechanism 5. Under the support of the guide wheel 6, the measuring cake 4 and the measuring needle 3 fall synchronously. The measuring needle 3 first contacts the sediment and is inserted into the sediment. After the measuring cake 4 contacts the sediment at the top, the measuring cake 4 no longer moves downward under the support of the sediment. Under the continuous unwinding of the measuring rope 2, the measuring needle 3 continues to move downward in the sediment until the measuring needle 3 moves down to the bottom of the bored pile hole. The control mechanism 8 controls the limiting mechanism 7. When switched to the restricted state, the restricting mechanism 7 prevents the measuring rope 2 from moving relative to one of the first channels. At this time, the portion of the measuring rope 2 that passes through the measuring needle 3 and connects to the measuring cake 4 can no longer move relative to the measuring needle 3. The measuring rope 2 is then reeled in by the reeling mechanism 5, and the measuring needle 3 and the measuring cake 4 are moved up. The length of the measuring rope 2 between the measuring cake 4 and the measuring needle 3 and the length of the measuring needle 3 are measured and read to obtain the thickness of the sediment. The sediment thickness can be measured at one time, which effectively improves the detection efficiency, reduces the detection error, and improves the detection accuracy.

[0038] See also Figure 1 In one embodiment of the present invention, the unwinding mechanism 5 includes a winding roller 51 and a rotating driving member 52. The upper end of the measuring rope 2 is wound on the winding roller 51. The two ends of the winding roller 51 are respectively connected to the frame 1 for rotation. The rotating driving member 52 is fixedly installed on the frame 1. The output shaft end of the rotating driving member 52 is connected to one end of the winding roller 51 through a transmission belt. The rotating driving member 52 adopts a motor or a rotating cylinder. The output shaft of the rotating driving member 52 and the end of the winding roller 51 are both provided with transmission wheels. The two transmission wheels are provided with the same transmission belt.

[0039] The winding roller 51 is driven to rotate by the rotating driving member 52, and one end of the measuring rope 2 is wound on the winding roller 51. The winding roller 51 can effectively wind up and unwind the measuring rope 2 when rotating forward and reverse, thereby improving the efficiency of lowering and lifting the measuring needle 3 and the measuring cake 4 during detection.

[0040] See also Figure 2 , Figure 4and Figure 5 In one embodiment of the present invention, the limiting mechanism 7 includes a clamping block 71, a swing arm 72, a limiting wheel 73, a support 74 and an inclined rod 75, and the clamping block 71 is arranged near the bottom end of one of the first channels;

[0041] One side of the clamping block 71 is fixedly connected to the inner wall of the cavity on the measuring needle 3, and the part of the measuring rope 2 located in the cavity is between the clamping block 71 and the limiting wheel 73. The limiting wheel 73 is fixedly installed on one end of the swing arm 72. The side of the swing arm 72 close to the limiting wheel 73 is rotatably connected to the inner wall of the cavity through a rotating shaft. The end of the swing arm 72 away from the limiting wheel 73 is hinged to the inclined rod 75. The bottom end of the inclined rod 75 is hinged to the support 74. The bottom end of the support 74 is connected to the control mechanism 8. The control mechanism 8 can drive the support 74 to move along the height direction of the measuring needle 3.

[0042] The support 74 is controlled to move upward by the control mechanism 8, and the support 74 drives the bottom end of the inclined rod 75 to move upward. The inclined rod 75 pushes the end of the swing arm 72, and the swing arm 72 rotates to drive the limiting wheel 73 to move to the side of the measuring rope 2. The limiting wheel 73 cooperates with the clamping block 71 to clamp the measuring rope 2, so that the clamped part of the measuring rope 2 cannot move. Since the clamping block 71 is set close to the bottom end of one of the first channels, it is possible to prevent the measuring rope 2 from moving relative to one of the first channels, that is, the part of the measuring rope 2 that passes through the measuring needle 3 and connects to the measuring cake 4 can no longer move relative to the measuring needle 3.

[0043] See also Figure 2 and Figure 4 In one embodiment of the present invention, the control mechanism 8 includes an A spring 81, a trigger head 82 and a control assembly. A hole groove is provided on the trigger head 82, and the inner wall of the hole groove is slidably connected to the bottom end of the measuring needle 3. The A spring 81 is arranged in the hole groove, and the top end of the A spring 81 is fixedly connected to the measuring needle 3, and the bottom end of the A spring 81 is fixedly connected to the inner wall of the hole groove. When the trigger head 82 moves upward along the height direction of the measuring needle 3 relative to the measuring needle 3, the control assembly drives the support 74 to move upward along the height direction of the measuring needle 3;

[0044] Since the trigger head 82 is arranged at the bottom end of the measuring needle 3, when the measuring needle 3 moves downward in the sediment, the trigger head 82 will first contact the bottom of the bored pile hole. When the trigger head 82 contacts the bottom of the hole, the trigger head 82 no longer moves, and the measuring needle 3 continues to move downward. The A spring 81 is compressed. At this time, the control component drives the support 74 to move upward along the height direction of the measuring needle 3. When the support 74 moves upward, the limit wheel 73 cooperates with the clamping block 71 to clamp the measuring rope 2. The part of the measuring rope 2 that passes through the measuring needle 3 and connects to the measuring cake 4 can no longer move relative to the measuring needle 3, so that the sediment depth can be measured without multiple measurements.

[0045] See also Figure 4In one embodiment of the present invention, the control assembly includes a pressure sensor 85, a pressing member 86 and a telescopic driving member 87. The pressure sensor 85 is fixedly mounted on the bottom surface of the hole groove, the pressing member 86 is arranged on the top of the pressure sensor 85, the top of the pressing member 86 is fixedly connected to the measuring needle 3, the telescopic driving member 87 is arranged inside the cavity of the measuring needle 3, the fixed end of the telescopic driving member 87 is fixedly connected to the measuring needle 3, and the movable end of the telescopic driving member 87 is fixedly connected to the support 74;

[0046] After the bottom end of the pressing member 86 contacts the pressure sensor 85, the pressure sensor 85 sends an electrical signal to the telescopic driving member 87. The moving end of the telescopic driving member 87 moves upward to drive the support 74 to move, so that the limit wheel 73 cooperates with the clamping block 71 to clamp the measuring rope 2. The part of the measuring rope 2 that passes through the measuring needle 3 and connects to the measuring cake 4 can no longer move relative to the measuring needle 3. Definition: The length of the measuring rope 2 between the measuring cake 4 and the measuring needle 3 is L. When the top end of the pressure sensor 85 contacts the bottom end of the measuring needle 3, the distance between the top end of the measuring needle 3 and the bottom end of the trigger head 82 is M. L+M is the depth of the sediment. Before measuring, the distance between the top of the measuring needle 3 and the bottom of the trigger head 82 when the top of the pressure sensor 85 contacts the bottom of the measuring needle 3 can be measured in advance. Therefore, in subsequent measurements, it is only necessary to measure the length of the measuring rope 2 between the measuring cake 4 and the measuring needle 3 when the part of the measuring rope 2 that passes through the measuring needle 3 and connects to the measuring cake 4 can no longer move relative to the measuring needle 3, so as to effectively obtain the depth of the sediment. The detection method is simple and efficient, and the sediment depth can be measured only once, thus avoiding the measurement error caused by multiple measurements and improving the detection accuracy.

[0047] See also Figure 2 and Figure 3 In one embodiment of the present invention, the control assembly includes a vertical rod 83 and a limiting member 84, the top of the vertical rod 83 is fixedly connected to the support 74, the bottom of the vertical rod 83 passes through the measuring needle 3 and is fixedly connected to the inner wall of the hole groove on the trigger head 82, the outer wall of the bottom end of the vertical rod 83 is slidably connected to the measuring needle 3, and one side of the vertical rod 83 is connected to the limiting member 84 that can prevent the vertical rod 83 from moving downward relative to the measuring needle 3 along the height direction of the measuring needle 3;

[0048] When the trigger head 82 contacts the bottom of the hole, the trigger head 82 no longer moves, the measuring needle 3 continues to move downward, the vertical rod 83 moves upward relative to the measuring needle 3, the vertical rod 83 drives the support 74 to move upward relative to the measuring needle 3, the limiting wheel 73 moves and cooperates with the clamping block 71 to clamp the measuring rope 2. At this time, the limiting member 84 prevents the vertical rod 83 from moving downward relative to the measuring needle 3 along the height direction of the measuring needle 3. After the limiting wheel 73 cooperates with the clamping block 71 to clamp the measuring rope 2, the vertical rod 83 can no longer move upward relative to the measuring needle 3. At this time, the distance between the top of the measuring needle 3 and the bottom of the trigger head 82 plus the length of the measuring rope 2 between the measuring cake 4 and the measuring needle 3 is the depth of the sediment;

[0049] In one embodiment of the present invention, the limiting member 84 includes a limiting strip 841, a pawl 842, a cross bar 843 and a B spring 844. The length direction of the limiting strip 841 is parallel to the length direction of the vertical rod 83. One side of the limiting strip 841 is fixedly connected to the vertical rod 83. The other side of the limiting strip 841 is provided with a plurality of ratchets that match the pawl 842 at equal intervals along the length direction of the limiting strip 841. The side of the pawl 842 away from the ratchet teeth is fixedly connected to the cross bar 843. One end of the cross bar 843 away from the pawl 842 passes through the measuring needle 3, and a boss is provided at one end of the cross bar 843 away from the pawl 842. The B spring 844 is sleeved on the outside of the cross bar 843. One end of the B spring 844 is fixedly connected to the cross bar 843, and the other end of the B spring 844 is fixedly connected to the measuring needle 3.

[0050] After the vertical rod 83 moves upward relative to the measuring needle 3 until the limiting wheel 73 cooperates with the clamping block 71 to clamp the measuring rope 2, under the action of the B spring 844, the end of the pawl 842 is inserted into the ratchet on the limiting bar 841. Under the action of the pawl 842 and the ratchet, the limiting bar 841 cannot move downward relative to the measuring needle 3, that is, the vertical rod 83 cannot move downward relative to the measuring needle 3. When it is necessary to remove the obstruction to the vertical rod 83, the boss at the end of the cross bar 843 is pulled, the B spring 844 is compressed, and the pawl 842 disengages from the ratchet, thereby contacting the obstruction to the movement of the limiting bar 841, that is, contacting the obstruction to the movement of the vertical rod 83.

[0051] In one embodiment of the present invention, the bottom end of the trigger head 82 is conical, which facilitates the insertion of the trigger head 82 into the sediment.

[0052] See also Figure 2 and Figure 6 In one embodiment of the present invention, a sponge 9 is provided on the inner wall of the upper end of the first channel, and a through hole is provided on the sponge 9 for the measuring rope 2 to pass through, so as to prevent impurities from entering the cavity on the measuring needle 3 through the first channel.

[0053] In one embodiment of the present invention, the transverse cross-section of the second channel is circular, and a plurality of balls 10 are arranged in a circular array with the central axis of the second channel as the center. The balls 10 are embedded in the inner wall of the second channel. The balls 10 can rotate in any direction relative to the inside of the second channel about the center of the balls 10 themselves, so as to reduce the friction between the measuring rope 2 and the second channel and reduce the wear of the measuring rope 2.

[0054] In one embodiment of the present invention, a corresponding control unit can be set for use. The control unit can select any controller to be connected to the electrical parts in the present application, so as to control the opening and closing operation of each electrical part. This part is the prior art. Here, a single-chip microcomputer can be provided as a control unit for display. The single-chip microcomputer in this embodiment is a typical embedded microcontroller (Microcontroller Unit), which is composed of an arithmetic unit, a controller, a memory, an input and output device, etc., which is equivalent to a microcomputer. Compared with the general-purpose microprocessor used in personal computers, it emphasizes self-supply (no external hardware) and cost saving. Its biggest advantage is that it is small in size and can be placed inside the instrument, but it has a small storage capacity, a simple input and output interface, and low functional consumption.

[0055] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for detecting the thickness of sediment in a concrete bored pile, comprising a frame (1), characterized in that: It also includes a measuring rope (2), a measuring needle (3), a measuring cake (4), a winding and unwinding mechanism (5), a guide wheel (6), a limiting mechanism (7) and a control mechanism (8); A cavity is provided inside the measuring needle (3), and a guide wheel (6) is rotatably installed in the cavity via a rotating shaft. Two first channels for the measuring rope (2) to pass through are provided at the top of the measuring needle (3), and the channels connect the cavity in the measuring needle (3) with the outside. A measuring cake (4) is arranged at the top of the measuring needle (3), and a second channel for the measuring rope (2) to pass through is provided on the measuring cake (4); The top end of the measuring rope (2) is connected to a reeling mechanism (5) for reeling in or unreeling the measuring rope (2); the end of the measuring rope (2) away from the reeling mechanism (5) passes through the second channel and the two first channels in sequence, and the portion of the measuring rope (2) in the cavity passes around the guide wheel (6); the end of the measuring rope (2) away from the reeling mechanism (5) is fixedly connected to the measuring cake (4); The limiting mechanism (7) is arranged on the measuring needle (3), and the limiting mechanism (7) can be switched between a limiting state and a non-limiting state; One side of the limiting mechanism (7) is connected to a control mechanism (8) for controlling the limiting mechanism (7) to switch its state. When the limiting mechanism (7) is in a limiting state, the limiting mechanism (7) blocks the movement of the measuring rope (2) relative to one of the first channels. When the limiting mechanism (7) is in a non-limiting state, the limiting mechanism (7) does not block the movement of the measuring rope (2) relative to one of the first channels.

2. A device for detecting the thickness of sediment in a concrete bored pile according to claim 1, characterized in that: The unwinding mechanism (5) comprises a winding roller (51) and a rotating driving member (52); the upper end of the measuring rope (2) is wound on the winding roller (51); the two ends of the winding roller (51) are respectively rotatably connected to the frame (1); the rotating driving member (52) is fixedly mounted on the frame (1); and the output shaft end of the rotating driving member (52) is transmission-connected to one end of the winding roller (51) via a transmission belt.

3. A device for detecting the thickness of sediment of a concrete bored pile according to claim 1, characterized in that: The limiting mechanism (7) comprises a pressing block (71), a swing arm (72), a limiting wheel (73), a support (74) and an inclined rod (75); One side of the clamping block (71) is fixedly connected to the inner wall of the cavity on the measuring needle (3); the part of the measuring rope (2) located in the cavity is between the clamping block (71) and the limiting wheel (73); the limiting wheel (73) is fixedly mounted on one end of the swing arm (72); the side of the swing arm (72) close to the limiting wheel (73) is rotatably connected to the inner wall of the cavity via a rotating shaft; the end of the swing arm (72) away from the limiting wheel (73) is hinged to the inclined rod (75); the bottom end of the inclined rod (75) is hinged to the support (74); the bottom end of the support (74) is connected to the control mechanism (8); and the control mechanism (8) can drive the support (74) to move along the height direction of the measuring needle (3).

4. A device for detecting the thickness of sediment in a concrete bored pile according to claim 3, characterized in that: The control mechanism (8) comprises an A spring (81), a trigger head (82) and a control assembly; A hole groove is formed on the trigger head (82), the inner wall of the hole groove is slidably connected to the bottom end of the measuring needle (3), an A spring (81) is arranged in the hole groove, the top end of the A spring (81) is fixedly connected to the measuring needle (3), and the bottom end of the A spring (81) is fixedly connected to the inner wall of the hole groove. When the trigger head (82) moves upward along the height direction of the measuring needle (3) relative to the measuring needle (3), the control component drives the support (74) to move upward along the height direction of the measuring needle (3).

5. A device for detecting the thickness of sediment in a concrete bored pile according to claim 4, characterized in that: The bottom end of the trigger head (82) is arranged in a conical shape.

6. A device for detecting the thickness of sediment in a concrete bored pile according to claim 4, characterized in that: The control assembly comprises a vertical rod (83) and a limiting member (84), wherein the top end of the vertical rod (83) is fixedly connected to the support (74), the bottom end of the vertical rod (83) passes through the measuring needle (3) and is fixedly connected to the inner wall of the hole groove on the trigger head (82), the outer wall of the bottom end of the vertical rod (83) is slidably connected to the measuring needle (3), and one side of the vertical rod (83) is connected to the limiting member (84) capable of preventing the vertical rod (83) from moving downward relative to the measuring needle (3) along the height direction of the measuring needle (3).

7. A device for detecting the thickness of sediment in a concrete bored pile according to claim 6, characterized in that: The limiting member (84) includes a limiting strip (841), a ratchet (842), a crossbar (843) and a B spring (844); The length direction of the limit bar (841) is parallel to the length direction of the vertical rod (83); one side of the limit bar (841) is fixedly connected to the vertical rod (83); the other side of the limit bar (841) is provided with a plurality of ratchet teeth matching with the pawl (842) at equal intervals along the length direction of the limit bar (841); the side of the pawl (842) away from the ratchet teeth is fixedly connected to the cross bar (843); one end of the cross bar (843) away from the pawl (842) passes through the measuring needle (3); and a boss is provided at one end of the cross bar (843) away from the pawl (842); a B spring (844) is sleeved outside the cross bar (843); one end of the B spring (844) is fixedly connected to the cross bar (843); and the other end of the B spring (844) is fixedly connected to the measuring needle (3).

8. A device for detecting the thickness of sediment in a concrete bored pile according to claim 4, characterized in that: The control component comprises a pressure sensor (85), a pressing member (86) and a telescopic driving member (87); the pressure sensor (85) is fixedly mounted on the bottom surface of the hole groove; the pressing member (86) is arranged on the top of the pressure sensor (85); the top end of the pressing member (86) is fixedly connected to the measuring needle (3); the telescopic driving member (87) is arranged inside the cavity of the measuring needle (3); the fixed end of the telescopic driving member (87) is fixedly connected to the measuring needle (3); and the movable end of the telescopic driving member (87) is fixedly connected to the support (74).

9. A device for detecting sediment thickness of a concrete bored pile according to claim 1, characterized in that: A sponge (9) is arranged on the inner wall of the upper end of the first channel, and a through hole is opened on the sponge (9) for the measuring rope (2) to pass through.

10. The device for detecting sediment thickness of a concrete bored pile according to claim 1, characterized in that: The transverse cross section of the second channel is circular, and a plurality of balls (10) are arranged in a circular array around the central axis of the second channel, and the balls (10) are embedded on the inner wall of the second channel.

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