A device for detecting quality of engineering foundation pit

Abstract

The invention discloses a device for detecting the quality of an engineering foundation pit, comprising a movable bracket arranged on the top surface of the foundation pit, a knocking mechanism movably arranged on the bracket, an adjusting mechanism for adjusting the height of the knocking mechanism arranged between the knocking mechanism and the bracket, and a driving mechanism for driving the knocking mechanism to reciprocately knock on the inner wall of the foundation pit by changing the center of gravity or the direction of the current. The invention does not require the staff to manually knock on the side wall of the foundation pit, thereby reducing the labor intensity and improving the detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit quality detection, and in particular to an engineering foundation pit quality detection device. Background Art

[0002] The construction pit is a temporary pit excavated for the building foundation. The function of the foundation pit is to provide a space for the foundation masonry work to be carried out according to the position specified by the design. At the same time, the foundation pit is the bearing space for the foundation, so there are strict requirements for the quality of the construction pit. The construction pit is mainly made by supporting the foundation pit to protect the surrounding soil structure and the environmental safety around the foundation pit. Then the foundation pit is excavated after drainage. After the foundation pit is excavated, a layer of concrete is laid on the inner wall of the foundation pit to protect the internal structure of the foundation pit and prevent the foundation pit from collapsing. Therefore, the concrete covering around the foundation pit is particularly important, and its quality also needs to be tested.

[0003] At present, when inspecting the construction quality of foundation pits, workers usually enter the foundation pits with hammers and continuously hammer the side walls of the foundation pits to determine whether the construction quality of the foundation pits meets the requirements.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there is a defect that the labor intensity of the workers is high during the process of hammering the side wall of the foundation pit. Summary of the invention

[0005] The purpose of the present invention is to provide a device for detecting the quality of an engineering foundation pit, which does not require workers to manually knock on the side walls of the foundation pit, thereby reducing manual labor intensity and improving detection efficiency.

[0006] In order to solve the above technical problems, the present invention adopts the following solutions:

[0007] A device for detecting the quality of an engineering foundation pit comprises a bracket arranged on the top surface of the foundation pit, a knocking mechanism is movably provided on the bracket, an adjusting mechanism for adjusting the height of the knocking mechanism is provided between the knocking mechanism and the bracket, and a driving mechanism is also included for driving the knocking mechanism to reciprocately knock on the inner wall of the foundation pit by changing the center of gravity or the direction of current.

[0008] Due to the adoption of the above technical solution, the bracket is arranged on the top surface of the foundation pit so as to perform detection at different positions of the foundation pit. The bracket needs to be stable enough to ensure that the knocking mechanism can work accurately and stably. The knocking mechanism is movably installed on the bracket and is used to knock on the inner wall of the foundation pit. The adjusting mechanism is arranged between the knocking mechanism and the bracket and is used to adjust the height of the knocking mechanism. Through the adjusting mechanism, it can be ensured that the knocking mechanism can accurately knock on different height positions of the inner wall of the foundation pit, so as to comprehensively evaluate the quality of the foundation pit. The driving mechanism drives the knocking mechanism to knock back and forth by changing the center of gravity or the direction of current. First, the bracket is placed on the top surface of the foundation pit, and its position is adjusted to ensure that the knocking mechanism can cover the area of ​​the inner wall of the foundation pit that needs to be inspected. Then, the height of the knocking mechanism is adjusted by the adjusting mechanism so that it can accurately knock on different height positions of the inner wall of the foundation pit. Finally, the driving mechanism is started to drive the knocking mechanism to knock back and forth by changing the center of gravity or the direction of current. This device has the advantages of simple operation, strong flexibility, and high detection accuracy. It can effectively improve the efficiency and accuracy of engineering foundation pit quality detection. The entire detection process does not require staff to manually knock on the side walls of the foundation pit, thereby reducing manual labor intensity and improving detection efficiency.

[0009] Optionally, the driving mechanism includes a driving motor, a connecting rod and a driving rod. The driving motor is fixed on the bracket and the output end of the driving motor is connected to a turntable. One end of the connecting rod is eccentrically hinged to the turntable, and the other end is hinged to an end of the driving rod. A penetrating installation cavity is provided in the middle of the bracket, and the middle of the driving rod is movably connected to the side wall of the installation cavity. A sliding groove with a T-shaped cross-section is provided in the middle of the driving rod, and a slider is provided in the sliding groove. The bottom surface of the slider is connected to an adjusting mechanism, and a knocking mechanism is connected below the adjusting mechanism. The driving mechanism drives the turntable to drive the connecting rod to rotate eccentrically and reciprocately change the center of gravity position of the driving rod. The slider slides back and forth along the length direction of the driving rod as the center of gravity of the driving rod reciprocates and drives the knocking mechanism to reciprocately knock on the inner wall of the foundation pit.

[0010] Optionally, the knocking mechanism includes a knocking ball and a connecting piece, wherein the lower end of the connecting piece is connected to the knocking ball, and the upper end of the connecting piece is connected to the adjusting mechanism.

[0011] Optionally, the connecting member is a chain, a steel wire rope or a steel bar.

[0012] Optionally, the adjusting mechanism is an electric hoist.

[0013] Optionally, buffers are provided at both ends of the slide groove, and the buffers are springs, air bags or rubber pads.

[0014] Optionally, the driving mechanism includes a supporting sleeve, a driving electromagnet block, and a transmission magnet block. An adjustment mechanism is arranged between the supporting sleeve and the bracket. The driving electromagnet block is fixed in the supporting sleeve. The transmission magnet block is slidably arranged in the supporting sleeve. One end of the transmission magnet block is connected to the knocking mechanism, and the other end is spaced apart from the driving electromagnet block within the magnetic field range of the driving electromagnet block. The driving electromagnet block wire is connected to a pulse current transmitter.

[0015] Optionally, the knocking mechanism includes a knocking block and a connecting rod, one end of the connecting rod is connected to the knocking block, and the other end of the connecting rod is connected to the transmission magnet block.

[0016] Optionally, a first strip-shaped limit groove is provided on the top surface of the connecting rod, the first limit groove vertically passes through the connecting rod, a second strip-shaped limit groove is provided on the supporting sleeve, a limit rod is inserted into the second limit groove, and the lower end of the limit rod is inserted into the first limit groove.

[0017] Optionally, the adjustment mechanism includes an adjusting screw and an adjusting nut, the lower end of the adjusting screw is connected to the top of the supporting sleeve, the upper end of the adjusting screw passes through the bracket, and the adjusting nut is threadedly connected to the adjusting screw and is located above the bracket.

[0018] The present invention has the beneficial effects:

[0019] 1. In the present invention, the bracket is placed on the top surface of the foundation pit, and its position is adjusted to ensure that the knocking mechanism can cover the area of ​​the inner wall of the foundation pit that needs to be detected. Then, the height of the knocking mechanism is adjusted by the adjusting mechanism so that it can accurately knock on different height positions of the inner wall of the foundation pit. Finally, the driving mechanism is started to drive the knocking mechanism to perform reciprocating knocking by changing the center of gravity or the direction of the current. This device has the advantages of simple operation, strong flexibility, and high detection accuracy. It can effectively improve the efficiency and accuracy of engineering foundation pit quality detection. The entire detection process does not require the staff to manually knock on the side wall of the foundation pit, thereby reducing the labor intensity and improving the detection efficiency.

[0020] 2. The present application provides an adjustment mechanism to change the striking position of the striking mechanism so as to adapt to foundation pits of different depths, thereby improving the applicability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure when the striking ball strikes the inner wall of the foundation pit;

[0023] Figure 3 Schematic diagram of the top view of the bracket;

[0024] Figure 4 It is the assembly structure diagram of the driving rod and the slider;

[0025] Figure 5 It is a structural schematic diagram of Example 2;

[0026] Figure 6 The top view of the supporting sleeve;

[0027] Figure 7 This is a top view of the connecting rod.

[0028] Figure markings: 1-foundation pit, 2-knocking ball, 3-connecting piece, 4-electric hoist, 5-installing cavity, 6-driving rod, 7-buffer, 8-bracket, 9-slide groove, 10-slider, 11-turntable, 12-driving motor, 13-connecting rod, 14-universal wheel, 15-second limiting groove, 16-first limiting groove, 17-driving electromagnet block, 18-transmission magnet block, 19-support sleeve, 20-guide strip, 21-connecting rod, 22-adjusting screw, 23-adjusting nut, 24-limiting rod, 25-knocking block, 26-hemispherical protrusion. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example 1

[0033] A quality inspection device for an engineering foundation pit 1 includes a bracket 8 arranged on the top surface of the foundation pit 1, a knocking mechanism is movably provided on the bracket 8, an adjustment mechanism for adjusting the height of the knocking mechanism is provided between the knocking mechanism and the bracket 8, and also includes a driving mechanism for driving the knocking mechanism to reciprocately knock on the inner wall of the foundation pit 1 by changing the center of gravity or the direction of current.

[0034] In this embodiment, Figure 1 As shown, the bracket 8 is arranged on the top surface of the foundation pit 1 so as to carry out detection at different positions of the foundation pit 1. The bracket 8 needs to be stable enough to ensure that the knocking mechanism can work accurately and stably. The knocking mechanism is movably mounted on the bracket 8 and is used to knock on the inner wall of the foundation pit 1. The adjusting mechanism is arranged between the knocking mechanism and the bracket 8 and is used to adjust the height of the knocking mechanism. Through the adjusting mechanism, it can be ensured that the knocking mechanism can accurately knock on different height positions of the inner wall of the foundation pit 1, so as to comprehensively evaluate the quality of the foundation pit 1. The driving mechanism drives the knocking mechanism to perform reciprocating knocking by changing the center of gravity or the direction of the current. First, the bracket 8 is placed on the top surface of the foundation pit 1 and its position is adjusted to ensure that the knocking mechanism can cover the area of ​​the inner wall of the foundation pit 1 that needs to be detected. Then, the height of the knocking mechanism is adjusted through the adjusting mechanism so that it can accurately knock on different height positions of the inner wall of the foundation pit 1. Finally, as shown in FIG. Figure 2 As shown, the driving mechanism is started to drive the knocking mechanism to perform reciprocating knocking by changing the center of gravity or the direction of the current. This device has the advantages of simple operation, strong flexibility, and high detection accuracy. It can effectively improve the efficiency and accuracy of the quality detection of the engineering foundation pit 1. The entire detection process does not require the staff to manually knock on the side wall of the foundation pit 1, thereby reducing the labor intensity and improving the detection efficiency.

[0035] Furthermore, the driving mechanism includes a driving motor 12, a connecting rod 13 and a driving rod 6. The driving motor 12 is fixed on the bracket 8 and the output end of the driving motor 12 is connected to a turntable 11. One end of the connecting rod 13 is eccentrically hinged to the turntable 11, and the other end is hinged to the end of the driving rod 6. A penetrating installation cavity 5 is provided in the middle of the bracket 8. The middle of the driving rod 6 is movably connected to the side wall of the installation cavity 5. A slide groove 9 with a T-shaped cross-section is provided in the middle of the driving rod 6. A slider 10 is provided in the slide groove 9. The bottom surface of the slider 10 is connected to an adjusting mechanism, and a knocking mechanism is connected below the adjusting mechanism. The driving mechanism drives the turntable 11 to drive the connecting rod 13 to rotate eccentrically and reciprocately change the center of gravity position of the driving rod 6. The slider 10 slides reciprocatingly along the length direction of the driving rod 6 as the center of gravity of the driving rod 6 reciprocates and drives the knocking mechanism to reciprocately knock on the inner wall of the foundation pit 1.

[0036] Specifically, Figure 1As shown, the drive motor 12 is the power source of the entire drive mechanism, which is fixed on the bracket 8 and is used to provide stable rotational power. The output end of the drive motor 12 is connected to a turntable 11, which is used to convert the rotational motion of the motor into the reciprocating motion of the connecting rod 13. A universal wheel 14 is provided under the bracket 8, which can have a self-locking structure. The universal wheel 14 can drive the entire device to move, and then the side walls of the foundation pit 1 at different positions can be detected. The turntable 11 is connected to the output end of the drive motor 12. When the motor is working, the turntable 11 will rotate accordingly. The design of the turntable 11 is eccentric, that is, the center of mass of the turntable 11 is not at its geometric center. In this way, when the turntable 11 rotates, the connecting rod 13 connected thereto will reciprocate due to the existence of eccentricity. One end of the connecting rod 13 is hinged to the eccentric position of the turntable 11, and the other end is hinged to one end of the driving rod 6. Due to the eccentric design of the turntable 11, when the turntable 11 rotates, the connecting rod 13 will swing back and forth, thereby driving the driving rod 6 to move. Figure 3 As shown, the middle part of the driving rod 6 is movably connected to the side wall of the mounting cavity 5 on the bracket 8, allowing the driving rod 6 to swing up and down in the mounting cavity 5, as shown in FIG. Figure 4 As shown, a slide groove 9 with a T-shaped cross-section is provided in the middle of the driving rod 6. The slide groove 9 is designed to cooperate with the slider 10 to realize the reciprocating sliding of the slider 10. A slider 10 is provided in the slide groove 9. The slider 10 can slide freely in the slide groove 9. The bottom surface of the slider 10 is connected to the adjusting mechanism. When the slider 10 slides back and forth in the slide groove 9, it will drive the adjusting mechanism and the knocking mechanism to perform corresponding movements. The adjusting mechanism is located below the slider 10 and is connected to the knocking mechanism. The adjusting mechanism can adjust the height position of the knocking mechanism as needed to ensure that the knocking mechanism can accurately knock on different positions of the inner wall of the foundation pit 1. When the driving motor 12 is working, it will drive the turntable 11 to rotate. Due to the eccentric design of the turntable 11, the connecting rod 13 connected thereto will swing back and forth. This reciprocating swing will drive the driving rod 6 to swing back and forth and change the center of gravity position of the driving rod 6. Since a T-shaped slide groove 9 and a slider 10 are provided in the middle of the driving rod 6, when the center of gravity position of the driving rod 6 changes, the slider 10 will slide back and forth in the slide groove 9 as the center of gravity of the driving rod 6 changes. When the slider 10 slides obliquely downward, the movement of the slider 10 will drive the knocking mechanism to move accordingly, thereby realizing reciprocating knocking on the inner wall of the foundation pit 1. Through this design, the knocking mechanism can realize automatic, continuous and accurate knocking detection on the inner wall of the foundation pit 1, thereby improving the efficiency and accuracy of the detection.

[0037] Furthermore, the knocking mechanism includes a knocking ball 2 and a connecting member 3, wherein the lower end of the connecting member 3 is connected to the knocking ball 2, and the upper end of the connecting member 3 is connected to the adjusting mechanism.

[0038] Specifically, the knocking ball 2 is the component that actually contacts the inner wall of the foundation pit 1, and the selection of its shape and material is usually based on the detection requirements. For example, in order to ensure the uniformity of knocking and reduce the errors caused by different materials, the knocking ball 2 may choose metal or plastic materials with moderate hardness and uniform density. The diameter and weight of the knocking ball 2 also need to be determined according to specific detection requirements so that sufficient force can be generated when knocking without causing excessive damage to the inner wall of the foundation pit 1. The connecting member 3 is the bridge between the knocking ball 2 and the adjusting mechanism, which is responsible for accurately transmitting the movement of the adjusting mechanism to the knocking ball 2. The upper end of the connecting member 3 is connected to the adjusting mechanism, and the position of the knocking ball 2 can be adjusted as needed to adapt to the inner wall of the foundation pit 1 of different positions and shapes. When the driving mechanism is working, it will change the position of the knocking mechanism (especially the knocking ball 2) through the adjusting mechanism. Once the position is adjusted, the driving mechanism will drive the knocking ball 2 to knock on the inner wall of the foundation pit 1. The knocking force and frequency can be precisely controlled by adjusting the speed of the driving motor 12 and the setting of the adjusting mechanism. The sound, vibration and other signals generated by the knocking can be used to evaluate the quality of the inner wall of the foundation pit 1, such as whether there are cracks, voids, looseness and other problems. This design can realize comprehensive, continuous and accurate detection of the inner wall of the foundation pit 1, thereby improving the efficiency and accuracy of quality detection of the engineering foundation pit 1.

[0039] Furthermore, the connecting member 3 is a chain, a steel wire rope or a steel bar.

[0040] Specifically, the chain has a certain flexibility, which can adapt to the shape and angle changes of the inner wall of the foundation pit 1 to a certain extent, so that the knocking ball 2 can more easily contact the detection point. In addition, the chain has a high strength and can withstand a large tensile force and impact force. The flexibility of the chain may also cause a certain shaking when knocking, affecting the accuracy of the knocking. The steel wire rope has high strength and flexibility, can withstand a large tensile force and impact force, and has good wear resistance and corrosion resistance. The diameter and length of the steel wire rope can be adjusted as needed to adapt to different detection requirements. The flexibility of the steel wire rope may also cause shaking when knocking, affecting the accuracy of the knocking. The steel bar has high strength and rigidity, which can ensure the stability and accuracy of the knocking. The diameter and length of the steel bar can be adjusted as needed to adapt to different detection requirements. In addition, the price of the steel bar is relatively low and the cost-effectiveness is high. The rigidity of the steel bar may make it difficult to adapt to the shape and angle changes of the inner wall of the foundation pit 1, making it difficult for the knocking ball 2 to contact certain detection points. When selecting the connector 3, it is necessary to comprehensively consider factors such as the specific detection requirements, the shape and angle changes of the inner wall of the foundation pit 1, and cost-effectiveness. If higher flexibility is required to adapt to different detection points, chains or wire ropes can be selected; if higher stability and accuracy are required, steel bars can be selected. At the same time, attention should also be paid to the strength and wear resistance of the connector 3 to ensure that it can work stably for a long time.

[0041] Furthermore, the adjusting mechanism is an electric hoist 4 .

[0042] Specifically, the electric hoist 4 can accurately adjust the height and position of the knocking ball 2 to adapt to the inner wall of the foundation pit 1 of different depths and shapes. This accuracy is crucial to ensuring that the knocking point is accurate and the detection data is reliable. The lifting and hovering functions of the electric hoist 4 enable the knocking mechanism to be easily moved to the position that needs to be detected and maintain a stable knocking state during the detection process. The electric hoist 4 is usually equipped with safety devices, such as overload protection, limit switches, etc., to ensure the safety of personnel and equipment during operation. The electric hoist 4 can be combined with a control system to achieve automatic control. For example, through programming or remote control, the position of the knocking point and the knocking frequency can be preset to improve the detection efficiency. The electric hoist 4 is fixed on the bracket 8, and its chain or wire rope is connected to the connecting piece 3. When the position of the knocking ball 2 needs to be adjusted, the connecting piece 3 and the knocking ball 2 are driven to move to the predetermined position by controlling the lifting and lowering of the electric hoist 4. Once the position adjustment is completed, the driving mechanism (such as the driving motor 12) starts to work, and drives the knocking ball 2 to knock on the inner wall of the foundation pit 1 through the connecting rod 13 and the driving rod 6. The sound, vibration and other signals generated by the knocking can be used to evaluate the quality of the inner wall of the foundation pit 1.

[0043] Furthermore, buffer components 7 are provided at both ends of the slide groove 9, and the buffer components 7 are springs, air bags or rubber pads.

[0044] Specifically, a spring is a commonly used buffer element. When the slider 10 slides to both ends of the slide groove 9, the spring will be compressed to absorb and reduce the impact force. The restoring force of the spring can ensure that the slider 10 quickly returns to the center position after the impact force disappears, ready for the next knock; an airbag or a pneumatic buffer can provide a smooth and uniform buffering effect. When the slider 10 hits the airbag, the gas in the airbag is compressed and released, which can dissipate most of the impact force while reducing vibration and noise; a rubber pad is a simple and effective buffer element. Its elasticity can absorb the impact force, and the rubber material can also reduce the friction and wear between the slider 10 and the slide groove 9. Choose a suitable buffer 7: According to the specific application scenario and requirements, choose the appropriate type and specification of the buffer 7. For example, for scenarios that require precise control, you can choose a spring or an airbag; for scenarios that need to withstand greater impact, a rubber pad may be more suitable. Installation position: The buffer 7 should be installed at both ends of the slide groove 9 to ensure that the slider 10 can contact the buffer 7 when it slides to both ends. At the same time, the installation position of the buffer 7 also needs to take into account the stroke and sliding speed of the slider 10. Providing buffers 7 at both ends of the slide slot 9 of the striking mechanism is an important design improvement, which can improve the stability and service life of the striking mechanism while reducing vibration and noise. By selecting the appropriate type and specification of buffers 7 and properly installing and maintaining them, it can be ensured that the striking mechanism can maintain good performance under various working conditions.

[0045] Example 2

[0046] Furthermore, the driving mechanism includes a supporting sleeve 19, a driving electromagnet block 17, and a transmission magnet block 18. An adjustment mechanism is arranged between the supporting sleeve 19 and the bracket 8. The driving electromagnet block 17 is fixed in the supporting sleeve 19. The transmission magnet block 18 is slidably arranged in the supporting sleeve 19. One end of the transmission magnet block 18 is connected to the knocking mechanism, and the distance between the other end and the driving electromagnet block 17 is located within the magnetic field range of the driving electromagnet block 17. The driving electromagnet block 17 wire is connected to a pulse current transmitter.

[0047] In this embodiment, Figure 5As shown, the support sleeve 19 serves as the main frame of the entire driving mechanism, is fixed on the bracket 8, and the height is adjusted by an adjusting mechanism. The interior of the support sleeve 19 provides a sliding track for the transmission magnet block 18, and a guide strip 20 can be provided on the inner wall of the support sleeve 19 to ensure the linearity of the movement of the transmission magnet block 18. The driving electromagnet block 17 is fixed in the support sleeve 19. When power is turned on, a magnetic field is generated, and this magnetic field interacts with the transmission magnet block 18, thereby driving the transmission magnet block 18 to reciprocate. The transmission magnet block 18 is slidably arranged in the support sleeve 19, one end of which is connected to the knocking mechanism, and the other end maintains a certain distance from the driving electromagnet block 17, and this distance needs to be within the magnetic field range of the driving electromagnet block 17. When the driving electromagnet block 17 is energized, the transmission magnet block 18 will move under the action of the magnetic field force. The pulse current transmitter (not shown in the figure) is connected to the driving electromagnet block 17 through a wire, and is used to send a pulse current to the driving electromagnet block 17. Parameters such as the frequency and intensity of the pulse current can control the magnetic field changes of the driving electromagnet block 17, and then control the movement speed and knocking frequency of the transmission magnet block 18. When the pulse current transmitter sends a pulse current to the driving electromagnet block 17, the driving electromagnet block 17 will generate a changing magnetic field, and this changing magnetic field will interact with the transmission magnet block 18, so that the transmission magnet block 18 reciprocates in the support sleeve 19. One end of the transmission magnet block 18 is connected to the knocking mechanism. Therefore, when the transmission magnet block 18 moves, it will drive the knocking mechanism to reciprocate and knock on the inner wall of the foundation pit 1. By adjusting the parameters such as the frequency and intensity of the pulse current, the knocking frequency and intensity of the knocking mechanism can be controlled to meet different detection requirements. The electromagnetic drive method has the advantages of fast response speed and high control accuracy, and can realize precise control of the knocking mechanism. The pulse current transmitter can easily adjust the parameters of the pulse current, thereby realizing flexible adjustment of the knocking frequency and intensity. The entire drive mechanism has a compact structure and stable and reliable operation, which is suitable for various engineering foundation pit 1 quality detection scenarios.

[0048] Furthermore, the knocking mechanism includes a knocking block 25 and a connecting rod 21 , one end of the connecting rod 21 is connected to the knocking block 25 , and the other end of the connecting rod 21 is connected to the transmission magnet block 18 .

[0049] Specifically, the knocking block 25 is the component that actually contacts the inner wall of the foundation pit 1. It is responsible for generating a knocking action to evaluate the quality of the inner wall of the foundation pit 1. The knocking block 25 is usually made of hard material to ensure that sufficient force and clear feedback can be generated when knocking. In order to better knock on the inner wall of the foundation pit 1, a plurality of hemispherical protrusions 26 can be provided on the side of the knocking block 25; the connecting rod 21 is a connecting component between the knocking block 25 and the transmission magnet block 18, one end of which is fixedly connected to the knocking block 25, and the other end is connected to the transmission magnet block 18. The function of the connecting rod 21 is to transmit the movement of the transmission magnet block 18 to the knocking block 25, so that the knocking block 25 can knock according to a predetermined trajectory and frequency. When the pulse current transmitter sends a pulse current to the driving electromagnet block 17, the driving electromagnet block 17 will generate a changing magnetic field, and this changing magnetic field will interact with the transmission magnet block 18, causing the transmission magnet block 18 to reciprocate in the support sleeve 19. Since one end of the connecting rod 21 is connected to the transmission magnet block 18 and the other end is connected to the knocking block 25, the movement of the transmission magnet block 18 will drive the connecting rod 21 and the knocking block 25 to move together. When the transmission magnet block 18 reciprocates in the support sleeve 19, the connecting rod 21 and the knocking block 25 will also perform corresponding reciprocating motion, so that the knocking block 25 reciprocates on the inner wall of the foundation pit 1. By adjusting parameters such as the frequency and intensity of the pulse current, the movement speed and knocking frequency of the transmission magnet block 18 can be controlled, and then the knocking frequency and strength of the knocking block 25 can be controlled. The knocking mechanism consists of the knocking block 25 and the connecting rod 21, and has a simple structure and is easy to install and maintain.

[0050] Furthermore, a first strip-shaped limiting groove 16 is provided on the top surface of the connecting rod 21 , and the first limiting groove 16 vertically penetrates the connecting rod 21 . A second strip-shaped limiting groove 15 is provided on the supporting sleeve 19 , and a limiting rod 24 is inserted into the second limiting groove 15 , and the lower end of the limiting rod 24 is inserted into the first limiting groove 16 .

[0051] Specifically, Figure 7 As shown, one end of the connecting rod 21 is connected to the knocking block 25, and the other end is connected to the transmission magnet block 18. On the top surface of the connecting rod 21, a first limiting groove 16 is designed. This first limiting groove 16 is vertically through-through, and both ends of the first limiting groove 16 are arc-shaped. The main function of the first limiting groove 16 is to limit the lateral movement of the connecting rod 21 in the supporting sleeve 19 to ensure that the connecting rod 21 always remains on a predetermined track during the reciprocating motion. At the same time, since it is vertically through-through, it also allows the connecting rod 21 to move freely in the vertical direction to adapt to slight position changes during the knocking process. The supporting sleeve 19 provides a sliding track for the transmission magnet block 18 and is fixed on the bracket 8, as shown in FIG. Figure 6As shown, a second limiting groove 15 is designed on the support sleeve 19. The second limiting groove 15 corresponds to the first limiting groove 16 and is used to insert the limiting rod 24. The second limiting groove 15 is a long strip opening on the support sleeve 19, with arc shapes at both ends. Its size and position need to match the first limiting groove 16 to ensure that the limiting rod 24 can be smoothly inserted and play a limiting role. The limiting rod 24 is a long rod-shaped component, the lower end of which is inserted into the first limiting groove 16, and the upper end is inserted into the second limiting groove 15. The function of the limiting rod 24 is to ensure that the connecting rod 21 moves along a predetermined track in the support sleeve 19 to prevent it from deflecting or shaking during the knocking process. When the transmission magnet block 18 reciprocates in the support sleeve 19, the connecting rod 21 will drive the knocking block 25 to move accordingly. Since the connecting rod 21 is provided with a first limiting groove 16, and the supporting sleeve 19 is provided with a second limiting groove 15 and a limiting rod 24, the movement trajectory of the connecting rod 21 will be strictly limited within a predetermined range, which can not only ensure that the knocking block 25 can accurately knock to the predetermined position of the inner wall of the foundation pit 1, but also improve the stability and accuracy of the knocking. By limiting the movement trajectory of the connecting rod 21, it can be ensured that the knocking block 25 will not deviate or shake during the knocking process, thereby improving the stability of the knocking. Since the movement trajectory of the connecting rod 21 is strictly limited within a predetermined range, it is possible to achieve accurate control of the knocking position and force to meet different detection requirements. This design structure is simple and clear, easy to install and maintain, and at the same time, due to the use of a standardized limiting groove and limiting rod 24 structure, it can also be easily replaced and repaired.

[0052] Furthermore, the adjustment mechanism includes an adjusting screw 22 and an adjusting nut 23. The lower end of the adjusting screw 22 is connected to the top of the supporting sleeve 19, the upper end of the adjusting screw 22 passes through the bracket 8, and the adjusting nut 23 is threadedly connected to the adjusting screw 22 and is located above the bracket 8.

[0053] Specifically, Figure 5As shown, the adjusting screw 22 is a long rod-shaped component, and its lower end is connected to the top of the supporting sleeve 19. The main function of the adjusting screw 22 is to serve as the main driving part of the adjusting mechanism. Through its rotation, it drives the supporting sleeve 19 and the entire knocking mechanism to move up and down. The adjusting nut 23 is a component with an internal thread, which is located above the adjusting screw 22 and is threadedly connected to the adjusting screw 22. The adjusting nut 23 is located above the bracket 8, and its position on the adjusting screw 22 can be changed by rotating the adjusting nut 23, thereby adjusting the height of the supporting sleeve 19 and the knocking mechanism. The bracket 8 is the fixed part of the entire adjusting mechanism, which is usually connected to the main part of the detection equipment. The adjusting screw 22 passes through the bracket 8, so that the adjusting nut 23 can rotate and move freely above the bracket 8. When the height of the knocking mechanism needs to be adjusted, it can be achieved by rotating the adjusting nut 23. Rotating the adjusting nut 23 will cause it to move up and down on the adjusting screw 22. Since the lower end of the adjusting screw 22 is connected to the supporting sleeve 19, the supporting sleeve 19 and the entire knocking mechanism will also move up and down accordingly. By adjusting the position of the adjusting nut 23 on the adjusting screw 22, the height of the knocking mechanism can be accurately controlled to adapt to the inner wall of the foundation pit 1 of different depths and shapes.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A quality inspection device for an engineering foundation pit (1), characterized in that: It comprises a bracket (8) arranged on the top surface of the foundation pit (1), a striking mechanism movably provided on the bracket (8), an adjusting mechanism for adjusting the height of the striking mechanism provided between the striking mechanism and the bracket (8), and a driving mechanism for driving the striking mechanism to reciprocately strike the inner wall of the foundation pit (1) by changing the center of gravity; The driving mechanism comprises a driving motor (12), a connecting rod (13) and a driving rod (6). The driving motor (12) is fixed on the bracket (8) and the output end of the driving motor (12) is connected to a rotating disk (11). One end of the connecting rod (13) is eccentrically hinged to the rotating disk (11), and the other end is hinged to the end of the driving rod (6). A penetrating installation cavity (5) is provided in the middle of the bracket (8). The middle of the driving rod (6) is movably connected to the side wall of the installation cavity (5). A sliding groove (9) with a T-shaped cross section is provided in the middle of the driving rod (6). A slider (10) is provided in the sliding groove (9). The bottom surface of the slider (10) is connected to an adjusting mechanism. The bottom of the adjusting mechanism is connected to a knocking mechanism. The driving mechanism drives the rotating disk (11) to drive the connecting rod (13) to rotate eccentrically and reciprocate to change the center of gravity position of the driving rod (6). The slider (10) slides reciprocatingly along the length direction of the driving rod (6) as the center of gravity of the driving rod (6) reciprocates and drives the knocking mechanism to reciprocately knock on the inner wall of the foundation pit (1).

2. A construction foundation pit (1) quality inspection device according to claim 1, characterized in that: The knocking mechanism comprises a knocking ball (2) and a connecting piece (3), wherein the lower end of the connecting piece (3) is connected to the knocking ball (2), and the upper end of the connecting piece (3) is connected to the adjusting mechanism.

3. A construction foundation pit (1) quality inspection device according to claim 2, characterized in that: The connecting piece (3) is a chain, a steel wire rope or a steel bar.

4. A construction foundation pit (1) quality inspection device according to claim 2, characterized in that: The regulating mechanism is an electric hoist (4).

5. The engineering foundation pit (1) quality detection device according to claim 1, characterized in that: Buffer components (7) are provided at both ends of the slide groove (9), and the buffer components (7) are springs, air bags or rubber pads.

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