Building foundation pile detection device using piezoelectric sensor

Abstract

The utility model discloses a building foundation pile detection device applying a piezoelectric sensor, which relates to the technical field of foundation pile detection and comprises a movable base and a detection foundation pile, the detection foundation pile is arranged on the side of the movable base, a lifting column is arranged on the movable base, a mounting block is arranged at the telescopic end of the lifting column, and a piezoelectric sensor is arranged on the mounting block. A cross beam is mounted on one side of the mounting block, a mounting box is movably arranged at the bottom of the cross beam, a threaded driving part used for driving the mounting box to move is arranged on the cross beam, when the impact force of the knocking hammer needs to be adjusted, the balancing weights are arranged on the guide columns in a sleeving mode to prevent the balancing weights from moving left and right, and the more the balancing weights are or the weight is larger; and the impact force during knocking is larger. After the balancing weight is adjusted, a knob is rotated, the knob drives a second threaded rod to move downwards, and the second threaded rod drives a pressing disc to press the balancing weight, so that detection personnel can flexibly adjust impact force according to needs to meet the requirements of different detection foundation piles.

Description

Technical Field

[0001] This utility model relates to the field of foundation pile testing technology, specifically to a building foundation pile testing device that uses a piezoelectric sensor. Background Technology

[0002] Pile foundations are the foundation of buildings, supporting structures on the ground. If the foundation becomes unstable, it will inevitably lead to the destruction of the entire building. Therefore, the quality of the pile foundation is a prerequisite for the safety and reliability of a building, making pile foundation testing particularly important. However, traditional pile testing devices typically rely on manual tapping during the testing process. This results in significant data errors and a lack of flexibility in controlling the tapping force, leading to low testing efficiency and accuracy.

[0003] Chinese patent document CN211228627U discloses a foundation pile testing device for building engineering, including a device body, a supporting beam, a lifting column, and a lifting mechanism. The device uses a control panel to start a servo motor, which, in conjunction with a winch, lowers a cable and a hammer to strike the foundation pile. A piezoelectric sensor fixed to the top of the pile receives the stress wave signal generated by the impact and transmits the induced signal to a low-strain foundation pile detector for inversion analysis and actual measurement, thereby obtaining the detection results for the integrity of the foundation pile.

[0004] When the above-mentioned patent is used, the cable and hammer are lowered by the cooperation of the servo motor and the winch to strike the foundation pile. However, since the weight of the hammer is fixed, the overall weight of the hammer cannot be flexibly changed in actual operation. This results in the impact force generated when the hammer falls being consistent, which makes the hammer unable to adapt to the testing requirements of different foundation piles. Utility Model Content

[0005] To address the aforementioned issues, a building foundation pile testing device using a piezoelectric sensor is provided. By incorporating an impact force adjustment component for adjusting the weight of the hammer, the technical problem of being unable to flexibly adjust the overall mass of the hammer and thus being unable to adapt to different testing requirements is solved.

[0006] To address the problems of existing technologies, this utility model provides a building foundation pile detection device using a piezoelectric sensor, comprising a movable base and a detection pile. The detection pile is disposed beside the movable base. A lifting column is mounted on the movable base, and a mounting block is provided at the telescopic end of the lifting column. A crossbeam is mounted on one side of the mounting block, and a mounting box is movably disposed at the bottom of the crossbeam. A threaded drive component for driving the mounting box to move is provided on the crossbeam. A winch is disposed inside the mounting box, and a first motor is disposed on one side of the mounting box. The output end of the first motor is connected to the winch. Next, a cable is wound around the winch, and a guide ring is provided below the winch in the mounting box. A striking hammer is provided at one end of the cable, and an impact force adjustment component is provided on the striking hammer for adjusting the weight of the striking hammer. A rotation adjustment component for adjusting the position of the striking hammer is provided between the movable base and the lifting column. A low-strain pile detector is provided on the movable base on one side of the lifting column. A piezoelectric sensor body is connected to one side of the low-strain pile detector via a data cable. The bottom of the piezoelectric sensor body is in contact with the top of the pile being tested.

[0007] Preferably, the impact force adjusting component includes a guide post and a second threaded rod; the hammer has a rectangular groove, the guide post is vertically arranged in the rectangular groove, a counterweight is sleeved on the guide post, and a sealing cap is provided at the open end of the rectangular groove by bolts; the second threaded rod is threaded to the top of the hammer, a knob is provided at one end of the second threaded rod, and a pressure plate is provided at the other end of the second threaded rod.

[0008] Preferably, a guide tube is provided at the bottom of the mounting box.

[0009] Preferably, the rotation adjustment component includes a rotating disk and a mounting bracket; the rotating disk is rotatably mounted on the top of the movable base, the top of the rotating disk is connected to the bottom of the lifting column, and a worm gear is sleeved on the outer side of the rotating disk; the mounting bracket is mounted on the top of the movable base and located on one side of the rotating disk, a worm is provided on the inner side of the mounting bracket, one end of the worm extends outward through one side of the worm, and a turntable is provided at the extended end of the worm.

[0010] Preferably, the threaded drive component includes a first threaded rod and a second motor; a mounting groove is provided on the crossbeam, and the first threaded rod is horizontally disposed in the mounting groove; the second motor is disposed at one end of the crossbeam, and the output end of the second motor is connected to the first threaded rod; a movable block is disposed on the first threaded rod, and the bottom of the movable block is connected to the top of the mounting box.

[0011] Preferably, support frames are provided on both sides of the crossbeam, and a sliding rod is provided on the inner side of the support frame. A slider is slidably mounted on the sliding rod, and the bottom of the slider is connected to the top of the mounting box.

[0012] The advantages of this utility model compared to the prior art are:

[0013] 1. When adjusting the impact force of the hammer, first loosen the bolts on the sealing cover and remove the sealing cover. Adjust the number or weight of the counterweights according to the required impact force. The counterweights are fitted onto the guide post to prevent them from moving left or right. More or heavier counterweights result in a greater impact force. After adjusting the counterweights, rotate the knob. The knob drives the second threaded rod downwards, which in turn drives the pressure plate to press the counterweights firmly, preventing them from moving or falling off during hammering. This allows the testing personnel to flexibly adjust the impact force to meet the needs of different foundation piles being tested.

[0014] 2. When the direction of the striking hammer needs to be adjusted, the operator manually rotates the turntable. The turntable drives the worm gear to rotate, and since the worm gear meshes with the worm wheel, the rotation of the worm gear drives the worm wheel and the turntable to rotate together. The rotation of the turntable drives the lifting column to rotate, and the rotation of the lifting column drives the crossbeam to rotate, thus realizing the adjustment of the striking hammer's direction. This facilitates continuous testing of multiple foundation piles, greatly improving the efficiency of foundation pile testing. Attached Figure Description

[0015] Figure 1 A three-dimensional schematic diagram of a building foundation pile detection device that uses piezoelectric sensors. Figure 1 .

[0016] Figure 2 A three-dimensional schematic diagram of a building foundation pile detection device that uses piezoelectric sensors. Figure 2 .

[0017] Figure 3 A cross-sectional view of the beam and mounting box in a building foundation pile testing device that uses piezoelectric sensors, viewed from the front.

[0018] Figure 4 This is a three-dimensional diagram of a building foundation pile detection device that uses piezoelectric sensors, showing the installation box, sliding rod, and slider.

[0019] Figure 5 This is a three-dimensional view of a hammer and sealing cap in a building foundation pile testing device that uses a piezoelectric sensor.

[0020] Figure 6 This is a three-dimensional diagram of a building foundation pile detection device that uses piezoelectric sensors, comprising a movable base, rotating disk, worm gear, and worm.

[0021] The following components are labeled in the diagram: 1. Movable base; 2. Testing pile; 3. Lifting column; 4. Mounting block; 5. Crossbeam; 6. Mounting box; 61. First threaded rod; 62. Second motor; 63. Movable block; 64. Support frame; 65. Sliding rod; 66. Sliding block; 7. Winch; 71. Guide ring; 8. First motor; 9. Cable; 10. Striking hammer; 101. Guide column; 102. Counterweight; 103. Second threaded rod; 104. Knob; 105. Pressure plate; 106. Sealing cover; 11. Rotation adjustment component; 1101. Rotating disk; 1102. Worm gear; 1103. Mounting frame; 1104. Worm; 1105. Turntable; 12. Low strain gauge for pile; 13. Piezoelectric sensor body; 14. Guide tube. Detailed Implementation

[0022] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0023] See Figures 1 to 6 As shown, this utility model provides a building foundation pile detection device using a piezoelectric sensor, including a movable base 1 and a detection pile 2. The detection pile 2 is disposed beside the movable base 1. A lifting column 3 is disposed on the movable base 1. A mounting block 4 is disposed at the telescopic end of the lifting column 3. A crossbeam 5 is disposed on one side of the mounting block 4. A mounting box 6 is movably disposed at the bottom of the crossbeam 5. A threaded drive component for driving the movement of the mounting box 6 is disposed on the crossbeam 5. A winch 7 is disposed inside the mounting box 6. A first motor 8 is disposed on one side of the mounting box 6. The output end of the first motor 8 is connected to the winch 7. The winch 7 is wound with piezoelectric sensors. A guide ring 71 is installed below the winch 7 inside the cable 9 and the installation box 6. A hammer 10 is installed at one end of the cable 9. The hammer 10 is also equipped with an impact force adjustment component for adjusting the weight of the hammer 10. A rotation adjustment component 11 for adjusting the position of the hammer 10 is installed between the movable base 1 and the lifting column 3. A low strain tester 12 for the foundation pile is installed on one side of the lifting column 3 on the movable base 1. A piezoelectric sensor body 13 is connected to one side of the low strain tester 12 for the foundation pile via a data cable. The bottom of the piezoelectric sensor body 13 is in contact with the top of the foundation pile 2 being tested.

[0024] By moving the movable base 1 to the vicinity of the test pile 2, and activating the lifting column 3, the crossbeam 5 and the striking hammer 10 are positioned in a suitable testing location. Then, according to testing requirements, the weight of the striking hammer 10 is adjusted via the impact force adjustment component to change the striking force. The mounting box 6 is moved on the crossbeam 5 via a threaded drive component to further adjust the lateral position of the striking hammer 10. The bottom of the piezoelectric sensor body 13 is brought into close contact with the top of the test pile 2 to ensure accurate capture of stress wave signals. The first motor 8 is activated, driving the winch 7 to rotate and releasing the cable 9, allowing the striking hammer 10 to fall freely and impact the test pile 2. When the striking hammer 10 impacts the test pile 2, it generates stress waves, which are captured by the piezoelectric sensor body 13 and converted into electrical signals. The electrical signal is transmitted to the low-strain pile detector 12 via the data line. The low-strain pile detector 12 analyzes key information such as the integrity and bearing capacity of the pile 2. The adjustment component 11 can be rotated to facilitate continuous testing of multiple piles 2, which greatly improves the efficiency of pile testing.

[0025] See Figures 1 to 4 As shown, the impact force adjustment component includes a guide post 101 and a second threaded rod 103; a rectangular groove is provided on the hammer 10, the guide post 101 is vertically arranged in the rectangular groove, a counterweight 102 is sleeved on the guide post 101, and a sealing cap 106 is provided at the open end of the rectangular groove by bolts; the second threaded rod 103 is threaded to the top of the hammer 10, a knob 104 is provided at one end of the second threaded rod 103, and a pressure plate 105 is provided at the other end of the second threaded rod 103.

[0026] When adjusting the impact force of the hammer 10, first loosen the bolts on the sealing cover 106 and remove the sealing cover 106. Adjust the number or weight of the counterweights 102 according to the required impact force. The counterweights 102 are fitted onto the guide post 101 to prevent them from moving left or right. The impact force increases with the number or weight of the counterweights 102. After adjusting the counterweights 102, rotate the knob 104. The knob 104 drives the second threaded rod 103 downwards, and the second threaded rod 103 drives the pressure plate 105 to press the counterweights 102 firmly, preventing them from moving or falling off during hammering. This allows the testing personnel to flexibly adjust the impact force as needed to meet the requirements of different test piles 2.

[0027] See Figure 3 As shown, a guide tube 14 is provided at the bottom of the mounting box 6.

[0028] When the first motor 8 starts, driving the winch 7 to rotate and releasing the cable 9, the hammer 10 falls freely along the guide tube 14 under the action of gravity. The guide tube 14 ensures the stability of the hammer 10 during the falling process, preventing the hammer 10 from deviating from the predetermined path or from swinging unnecessarily.

[0029] See Figure 5 and Figure 6 As shown, the rotating adjustment component 11 includes a rotating disk 1101 and a mounting bracket 1103; the rotating disk 1101 is rotatably mounted on the top of the movable base 1, and the top of the rotating disk 1101 is connected to the bottom of the lifting column 3. A worm gear 1102 is sleeved on the outer side of the rotating disk 1101; the mounting bracket 1103 is mounted on the top of the movable base 1 and located on one side of the rotating disk 1101. A worm gear 1104 is provided on the inner side of the mounting bracket 1103. One end of the worm gear 1104 extends outward through one side of the worm gear 1104, and a turntable 1105 is provided at the extended end of the worm gear 1104.

[0030] When the direction of the striking hammer 10 needs to be adjusted, the operator manually rotates the turntable 1105. The turntable 1105 drives the worm gear 1104 to rotate. Since the worm gear 1104 meshes with the worm wheel 1102, the rotation of the worm gear 1104 drives the worm wheel 1102 and the turntable 1101 to rotate together. The rotation of the turntable 1101 drives the lifting column 3 to rotate, and the rotation of the lifting column 3 drives the crossbeam 5 to rotate, thus realizing the adjustment of the direction of the striking hammer 10. This facilitates continuous testing of multiple piles 2, greatly improving the efficiency of pile testing.

[0031] See Figure 1 As shown, the thread drive component includes a first threaded rod 61 and a second motor 62; a mounting groove is provided on the crossbeam 5, and the first threaded rod 61 is horizontally arranged in the mounting groove; the second motor 62 is arranged at one end of the crossbeam 5, and the output end of the second motor 62 is connected to the first threaded rod 61; a moving block 63 is provided on the first threaded rod 61, and the bottom of the moving block 63 is connected to the top of the mounting box 6.

[0032] When it is necessary to adjust the lateral position of the hammer 10, the second motor 62 is started, which drives the first threaded rod 61 to rotate. The rotation of the first threaded rod 61 drives the moving block 63 to move, and the movement of the moving block 63 drives the mounting box 6 to move, thereby adjusting the lateral position of the hammer 10.

[0033] See Figure 1 As shown, support frames 64 are provided on both sides of the crossbeam 5, and a slide rod 65 is provided on the inner side of the support frame 64. A slider 66 is slidably mounted on the slide rod 65, and the bottom of the slider 66 is connected to the top of the mounting box 6.

[0034] When the movement of the moving block 63 causes the mounting box 6 to move, the slider 66 on the mounting box 6 slides on the slide rod 65, thereby improving the smoothness and accuracy of the movement of the mounting box 6.

[0035] By moving the movable base 1 to the vicinity of the pile 2 to be tested, the lifting column 3 is activated, positioning the crossbeam 5 and the striking hammer 10 in a suitable testing position. Then, the weight of the striking hammer 10 is adjusted according to the testing requirements. First, the bolts on the sealing cover 106 are loosened, and the sealing cover 106 is removed. The number or weight of the counterweights 102 is increased or decreased according to the required impact force. The counterweights 102 are fitted onto the guide column 101 to prevent them from moving left or right. The more counterweights 102 or the greater their weight, the greater the impact force during striking. After adjusting the counterweights 102, the knob 104 is rotated, driving the second threaded rod 103 downwards. The second threaded rod 103 then drives the pressure plate 105 to press the counterweights 102 firmly, preventing them from moving or falling off during striking. This allows the testing personnel to flexibly adjust the impact force as needed to adapt to the requirements of different piles 2 being tested. Then, the mounting box 6 is moved on the crossbeam 5 by the threaded drive component to further adjust the lateral position of the hammer 10. The bottom of the piezoelectric sensor body 13 is brought into close contact with the top of the pile 2 to ensure accurate capture of stress wave signals. The first motor 8 is started, driving the winch 7 to rotate and releasing the cable 9, allowing the hammer 10 to fall freely and impact the pile 2. When the hammer 10 impacts the pile 2, stress waves are generated, which are captured by the piezoelectric sensor body 13 and converted into electrical signals. The electrical signals are transmitted to the pile low-strain detector 12 via a data line. The pile low-strain detector 12 analyzes key information such as the integrity and bearing capacity of the pile 2, and the operator can manually rotate the turntable 1105. The turntable 1105 drives the worm gear 1104 to rotate. Since the worm gear 1104 meshes with the worm wheel 1102, the rotation of the worm gear 1104 drives the worm wheel 1102 and the turntable 1101 to rotate together. The rotation of the rotating disk 1101 drives the lifting column 3 to rotate, which in turn drives the crossbeam 5 to rotate, thus adjusting the direction of the striking hammer 10. This facilitates continuous testing of multiple foundation piles 2, greatly improving the efficiency of foundation pile testing.

[0036] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A building foundation pile detection device using a piezoelectric sensor, characterized in that, The device includes a movable base (1) and a detection pile (2). The detection pile (2) is located beside the movable base (1). A lifting column (3) is provided on the movable base (1). An installation block (4) is provided at the telescopic end of the lifting column (3). A crossbeam (5) is installed on one side of the installation block (4). An installation box (6) is movably provided at the bottom of the crossbeam (5). A threaded drive component for driving the installation box (6) is provided on the crossbeam (5). A winch (7) is provided inside the installation box (6). A first motor (8) is provided on one side of the installation box (6). The output end of the first motor (8) is connected to the winch (7). A cable (9) is wound on the winch (7). Inside the box (6), a guide ring (71) is provided below the winch (7). One end of the cable (9) is provided with a hammer (10). The hammer (10) is also provided with an impact force adjustment component for adjusting the weight of the hammer (10). A rotation adjustment component (11) for adjusting the position of the hammer (10) is provided between the movable base (1) and the lifting column (3). A low strain tester (12) for foundation piles is provided on one side of the movable base (1) and the lifting column (3). A piezoelectric sensor body (13) is connected to one side of the low strain tester (12) for foundation piles via a data cable. The bottom of the piezoelectric sensor body (13) is in contact with the top of the test pile (2).

2. The building foundation pile detection device using a piezoelectric sensor according to claim 1, characterized in that, The impact force adjustment component includes a guide post (101) and a second threaded rod (103). The hammer (10) has a rectangular groove, the guide post (101) is vertically installed in the rectangular groove, the guide post (101) is fitted with a counterweight (102), and the opening end of the rectangular groove is fitted with a sealing cap (106) by bolts. The second threaded rod (103) is threaded to the top of the hammer (10), and a knob (104) is provided at one end of the second threaded rod (103), and a pressure plate (105) is provided at the other end of the second threaded rod (103).

3. The building foundation pile detection device using a piezoelectric sensor according to claim 1, characterized in that, The bottom of the mounting box (6) is provided with a guide tube (14).

4. The building foundation pile detection device using a piezoelectric sensor according to claim 1, characterized in that, The rotation adjustment component (11) includes a rotating disk (1101) and a mounting bracket (1103). The rotating disk (1101) is rotatably mounted on the top of the movable base (1). The top of the rotating disk (1101) is connected to the bottom of the lifting column (3). A worm gear (1102) is sleeved on the outer side of the rotating disk (1101). The mounting bracket (1103) is located on the top of the movable base (1) and on one side of the rotating disk (1101). A worm gear (1104) is provided on the inner side of the mounting bracket (1103). One end of the worm gear (1104) extends outward through one side of the worm gear (1104). A turntable (1105) is provided at the extended end of the worm gear (1104).

5. A building foundation pile detection device using a piezoelectric sensor according to claim 1, characterized in that, The threaded drive component includes a first threaded rod (61) and a second motor (62); The crossbeam (5) has an installation groove, and the first threaded rod (61) is horizontally installed in the installation groove; the second motor (62) is installed at one end of the crossbeam (5), and the output end of the second motor (62) is connected to the first threaded rod (61). The first threaded rod (61) is provided with a moving block (63), and the bottom of the moving block (63) is connected to the top of the mounting box (6).

6. The building foundation pile detection device using a piezoelectric sensor according to claim 1, characterized in that, Support frames (64) are provided on both sides of the crossbeam (5). A slide rod (65) is provided on the inner side of the support frame (64). A slider (66) is slidably provided on the slide rod (65). The bottom of the slider (66) is connected to the top of the mounting box (6).

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