Gravel foundation bed flatness detection device

Abstract

The utility model discloses a gravel foundation bed flatness detection device which comprises a fixing frame, a main control module, a data processing module, a detection driver, a displacement detection module and a detection rod, the detection driver, the displacement detection module and the detection rod are arranged on the fixing frame, and the fixing frame is fixedly connected with a riprap pipe. The detection rod vertically descends to be in contact with the surface of the gravel foundation bed under the action of self weight or under the driving of the detection driver, displacement data of the detection rod every time the detection rod descends are obtained through the displacement detection module, the obtained displacement data are fed back to the main control module, and the main control module transmits the displacement data to the data processing module; the data is compared with a set value pre-stored by the data processing module; and if the displacement data exceed the pre-stored set value range, the master control module controls the riprap pipe to perform scraping action according to a signal fed back by the data processing module. Therefore, the influence of turbid nearby water areas is avoided, the environmental adaptability is higher, the flatness detection precision of the gravel foundation bed is further ensured, and the detection cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater measurement equipment, in particular to a device for detecting the flatness of a crushed stone bed. Background Art

[0002] During the construction of a submarine immersed tube tunnel, a "bow"-shaped crushed stone ridge needs to be laid on the crushed stone bed, and the flatness of the crushed stone ridge can ensure the stability and safety when the immersed tube is placed.

[0003] Currently, a multi-beam sounding instrument is usually arranged on the stone throwing pipe. Multiple sound waves are emitted by the multi-beam sounding instrument to form a fan shape, which is projected onto the surface of the crushed stone ridge and then reflected back. Moreover, the multi-beam sounding instrument can receive the signal, and based on the time when the signal is received, the distance traveled by the sound wave can be calculated, so as to judge the flatness of the crushed stone ridge.

[0004] Although the multi-beam sounding instrument arranged on the polishing pipe in the prior art can meet the basic requirements for judging the flatness of the crushed stone ridge, there are still the following defects: when the stone throwing pipe lays the crushed stone ridge underwater, the water in the nearby water area becomes turbid, which affects the sound waves emitted by the multi-beam sounding instrument, thereby reducing the detection accuracy of the multi-beam sounding instrument for the flatness of the crushed stone bed. Content of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a device for detecting the flatness of a crushed stone bed.

[0006] The purpose of the utility model is realized by adopting the following technical solution: a device for detecting the flatness of a crushed stone bed, including a fixing frame, a main control module, a data processing module, a detection driver, a displacement detection module and a detection rod arranged on the fixing frame. The fixing frame is fixedly connected with the stone throwing pipe. The main control module is electrically connected to the data processing module, the detection driver and the displacement detection module. The detection driver is connected to the detection rod;

[0007] The detection rod vertically descends to contact the surface of the crushed stone bed under its own weight or driven by the detection driver. The displacement data of each descent of the detection rod is obtained through the displacement detection module, and the obtained displacement data is fed back to the main control module. The main control module transmits the displacement data to the data processing module and compares it with the set value pre-stored in the data processing module;

[0008] If the displacement data is within the pre-stored set value range, the main control module controls the stone throwing pipe to perform a scraping action according to the signal fed back by the data processing module.

[0009] Further, the fixing frame has a first bracket and a second bracket. The first bracket is horizontally arranged and fixedly connected with the stone throwing pipe. The second bracket is vertically arranged and fixedly connected with the first bracket;

[0010] The detection driver is arranged on the first bracket, the displacement detection module is fixedly arranged on the second bracket, the detection rod is movably arranged on the second bracket, the detection driver is connected to the detection rod through a steel wire rope, and the displacement detection module is used to detect the displacement data of the detection rod descending vertically along the second bracket.

[0011] Furthermore, the second bracket is arranged as a hollow tube, the detection rod is movably arranged inside the second bracket and moves up and down along the vertical direction of the second bracket.

[0012] Furthermore, the detection driver is arranged as a speed reducer, a fixed pulley is arranged at the corner connection position between the first bracket and the second bracket, the output end of the speed reducer is connected with a reel around which the steel wire rope is wound, and the steel wire rope is turned by the fixed pulley and connected to the detection rod.

[0013] Furthermore, the displacement detection module is arranged as a magnetic linear encoder, which has a magnetic head and a magnetic scale. The magnetic head is arranged on the second bracket and electrically connected to the main control module. One end of the magnetic scale is connected to the magnetic head, and the other end is connected to the detection rod. The magnetic head acquires the displacement data of the magnetic scale following the movement of the detection rod and feeds the displacement data back to the main control module.

[0014] Furthermore, the displacement detection module is arranged as a wire-pulling displacement sensor, which has a sensor element and a wire. The sensor element is arranged on the second bracket and electrically connected to the main control module. One end of the wire is connected to the sensor element, and the other end is connected to the detection rod. The sensor element acquires the displacement data of the wire following the movement of the detection rod and feeds the displacement data back to the main control module.

[0015] Furthermore, the detection rod is connected with a horizontally arranged contact plate. The upper surface of the contact plate is fixedly connected to the lower end of the detection rod, and the lower surface of the contact plate is used to contact the crushed stone bed.

[0016] Furthermore, the detection rod is connected with a contact ball. The contact ball is arranged as a hemispherical shape. The cross-sectional part of the contact ball is fixedly connected to the lower end of the detection rod, and the spherical part of the contact ball is used to contact the crushed stone bed.

[0017] Furthermore, the detection driver drives the detection rod to descend at a displacement interval of 1 meter along the laying direction of the stone throwing pipe to detect the flatness of the crushed stone bed.

[0018] Furthermore, the stone throwing pipe is connected with a stone throwing driver. The stone throwing driver is electrically connected to the main control module. An inclined angle scraping part is arranged at the lower end of the stone throwing pipe. The stone throwing driver receives the feedback signal from the main control module and drives the stone throwing pipe to scrape the crushed stone bed along the laying direction through the inclined angle scraping part.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: The detection device provided in the embodiment of the present application is arranged on the stone throwing pipe, so it can move along with the stone throwing pipe in the laying direction, achieving the purpose of detecting the flatness of the crushed stone bed in the laying direction; under the drive of the detection driver, the detection rod of the detection device descends vertically and directly touches the surface of the crushed stone bed, and the displacement detection module detects the displacement data of the detection rod along the laying direction each time, so as to obtain the flatness conditions of different positions of the crushed stone bed. After the displacement data is compared and analyzed by the data processing module, the main control module sends an instruction to control the stone throwing pipe to level the part of the crushed stone bed with non-compliant flatness.

[0020] Compared with the prior implementation means of setting a multi-beam sounder on the stone throwing pipe to emit sound waves to detect the flatness of the crushed stone bed, the detection means of driving the detection rod to descend vertically and touch the crushed stone bed in the embodiment of the present application can eliminate the influence of the turbidity of the nearby water area, has stronger environmental adaptability, and further ensures the detection accuracy of the flatness of the crushed stone bed and reduces the detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the connection between the detection device and the stone throwing pipe in the first embodiment of the present utility model;

[0022] Figure 2 It is a front view of the detection device in the first embodiment of the present utility model;

[0023] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0024] Figure 4 is Figure 2 an enlarged schematic view of part B in

[0025] Figure 5 It is a perspective view of the detection device in the first embodiment of the present utility model;

[0026] Figure 6 is Figure 5 an enlarged schematic view of part C in

[0027] Figure 7 It is a block diagram of the working principle in the first embodiment of the present utility model.

[0028] In the figure:

[0029] 1. Detection device;

[0030] 10. Fixed frame; 101. First bracket; 102. Second bracket;

[0031] 20. Main control module; 21. Data processing module; 22. Power supply module;

[0032] 30. Detection driver; 31. Steel wire rope; 32. Fixed pulley;

[0033] 40. Displacement detection module; 41. Detection rod; 42. Contact plate; 43. Contact ball; 401. Magnetic linear encoder; 402. Magnetic head; 403. Magnetic scale;

[0034] 50. Stone throwing pipe; 501. Oblique angle scraping part; 51. Stone throwing driver; 52. Multi-wave velocity sounder. Specific implementation mode

[0035] Next, in combination with the accompanying drawings and specific implementation modes, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0036] First embodiment

[0037] As Figure 1-7 shown, a gravel bed flatness detection device 1 is installed on the stone throwing pipe 50 and is used for detecting the flatness of the gravel ridge laid on the gravel bed. More specifically, the gravel bed flatness detection device 1 includes a fixed frame 10, a main control module 20, a data processing module 21, and a detection driver 30, a displacement detection module 40, and a detection rod 41 arranged on the fixed frame 10. The main control module 20 is electrically connected to the data processing module 21, the detection driver 30, and the displacement detection module 40. In addition, the main control module 20 is electrically connected to a power supply module 22.

[0038] An oblique angle scraping part 501 with an end oblique angle set outward is arranged at the lower end of the stone throwing pipe 50. The stone throwing pipe 50 is connected to a stone throwing driver 51. The stone throwing driver 51 is electrically connected to the main control module 20. The stone throwing driver 51 receives the feedback signal of the main control module 20 and drives the stone throwing pipe 50 to move along the laying direction on the gravel bed, and scrapes the convex part or fills the concave part of the gravel ridge on the gravel bed through the oblique angle scraping part 501. The detection device 1 can move along the laying direction following the stone throwing pipe 50 to detect the flatness of the construction section after the gravel bed construction, achieving the purpose of detecting the flatness of the gravel bed in the laying direction.

[0039] The fixing bracket 10 has a first bracket 101 and a second bracket 102. The first bracket 101 is horizontally arranged and fixedly connected to the pipe wall of the stone-throwing pipe 50. The second bracket 102 is vertically arranged, and the upper end of the second bracket 102 is fixedly connected to the first bracket 101, so that a right-angle connection relationship is formed between the first bracket 101 and the second bracket 102. Moreover, a fixing plate is connected between the first bracket 101 and the second bracket 102, so that a triangular connection structure is formed among the first bracket 101, the second bracket 102 and the fixing plate, improving the structural stability of the first bracket 101 and the second bracket 102.

[0040] The second bracket 102 is arranged as a hollow pipe, and the detection rod 41 is vertically and movably arranged inside the bottom of the second bracket 102, so as to better avoid the detection rod 41 being affected by the external environment. In addition, the second bracket 102 can also be arranged as a solid rod or a solid plate. At this time, the detection rod 41 needs to be movably arranged outside the second bracket 102.

[0041] The detection driver 30 is installed on the first bracket 101. A winding drum is connected to the output end of the detection driver 30. The winding drum is used for winding the steel wire rope 31. One end of the first bracket 101 away from the stone-throwing pipe 50 is fixedly connected to the upper end of the second bracket 102. Moreover, a fixed pulley 32 is arranged at the corner position where the first bracket 101 and the second bracket 102 are connected to each other. The steel wire rope 31 is stretched out from the winding drum and is vertically downward connected to the upper end of the detection rod 41 after being turned by the fixed pulley 32.

[0042] Therefore, by starting the detection driver 30 to drive the winding drum to rotate, the steel wire rope 31 is wound and unwound. For example, when the detection driver 30 drives the winding drum to rotate forward to release the steel wire rope 31, the detection rod 41 vertically descends under its own gravity. If the self-gravity of the detection rod 41 is not enough to cause it to descend, an appropriate amount of sand can be poured on the detection rod for counterweight.

[0043] When the detection driver 30 drives the winding drum to rotate in reverse to wind up the steel wire rope 31, the detection rod 41 can be vertically pulled up. The detection rod 41 is lowered for the next detection, so that the detection rod 41 can freely lift and lower in the vertical direction of the second bracket 102. The detection driver 30 provided in the embodiment of the present application preferably selects a speed reducer and can also be a motor.

[0044] The detection rod 41 vertically descends until it contacts the surface of the gravel ridge of the gravel bed.

[0045] Specifically, such as Figure 2 、 4As shown, the lower end of the detection rod 41 is provided with a contact plate 42. The contact plate 42 is horizontally arranged. The upper surface of the contact plate 42 is fixedly connected to the lower end of the detection rod 41, and the lower surface of the contact plate 42 is used to contact the crushed stone ridge. When the detection rod 41 descends vertically, the lower surface of the contact plate 42 can contact the surface of the crushed stone ridge, enabling the detection rod 41 to contact the surface of the crushed stone ridge more smoothly, avoiding detection errors, and improving the detection accuracy of the detection rod 41.

[0046] In the case of relatively high requirements for the flatness detection of the crushed stone ridge, such as Figure 5 、 6 As shown, a contact ball 43 is provided at the lower end of the detection rod 41. The contact ball 43 is set to be hemispherical. The cross-sectional part of the contact ball 43 is fixedly connected to the lower end of the detection rod 41, and the spherical part of the contact ball 43 is used to contact the surface of the crushed stone ridge. Moreover, the diameter of the contact ball 43 is smaller than the diameter or width of the detection rod 41. By providing the contact ball 43 at the lower end of the detection rod 41, the detection rod 41 can be lowered to any position, thereby increasing the detection range of the detection rod 41, having a wider application range, and enabling deeper detection.

[0047] The detection driver 30 drives the detection rod 41 to descend once every 1-meter displacement along the laying direction of the stone throwing pipe 50 to detect the flatness of the crushed stone ridge, and then detects several flatness data of the crushed stone ridge along the laying direction of the stone throwing pipe 50. Through the comparison and analysis of several data, the accuracy of the detection rod 41 in detecting the flatness of the surface of the crushed stone ridge is improved.

[0048] The main control module 20 sends an instruction to control the displacement detection module 40 to obtain the displacement data of the descending height of the detection rod 41 during each descending detection. The displacement data reflects the height of the protruding part or the depth of the sunken part on the surface of the crushed stone ridge, and the obtained displacement data is fed back to the main control module 20. The main control module 20 transmits the displacement data to the data processing module 21. The displacement data is converted by the data processing module 21 and compared with the set value pre-stored in the data processing module 21. Moreover, the comparison situation is displayed on the display in the control center, and the user can intuitively observe the current detection data situation. The set value pre-stored in the data processing module 21 can be set according to the actual application situation and will not be elaborated here.

[0049] If, after the comparison and analysis by the data processing module 21, the comparison result exceeds the set value range, the main control module 20 controls the stone throwing pipe 50 to perform a scraping action according to the feedback signal.

[0050] The displacement detection module 40 is installed on the second support 102. In the embodiment of the present application, the displacement detection module 40 preferably selects a magnetic linear encoder 401. The magnetic linear encoder 401 has a magnetic head 402 and a magnetic scale 403. The magnetic head 402 is arranged on the second support 102 and electrically connected to the main control module 20. One end of the magnetic scale 403 is connected to the magnetic head 402, and the other end is connected to the detection rod 41. The magnetic scale 403 can vertically lift and lower along with the detection rod 41.

[0051] When the magnetic head 402 approaches the magnetic scale 403, the magnetic head 402 will sense the change in the magnetic field because the magnetic stripes on the magnetic scale 403 have different magnetic polarities at different positions. The magnetic sensor inside the magnetic head 402 can sense this magnetic field change and convert it into an electrical signal. By processing and decoding these electrical signals, accurate displacement data can be obtained. The magnetic head 402 acquires the displacement data of the magnetic scale 403 moving along with the detection rod 41 and feeds the displacement data back to the main control module 20. The displacement data of the magnetic scale 403 acquired by the magnetic head 402 is the displacement data of the detection rod 41, thereby obtaining the flatness of the crushed stone ridge.

[0052] In this way, the detection device 1 provided in the embodiment of the present application is arranged on the stone throwing pipe 50. The detection rod 41 is driven by the detection driver 30 to vertically descend and directly contact the surface of the crushed stone ridge of the crushed stone foundation bed. The displacement detection module 40 detects the displacement data of the detection rod 41 each time along the laying direction, so as to obtain the flatness conditions of different positions of the crushed stone foundation bed. After the displacement data is compared and analyzed by the data processing module 21, the main control module 20 sends an instruction to control the stone throwing pipe 50 to scrape the part of the crushed stone foundation bed with non-compliant flatness; compared with the previous implementation method of setting a multi-beam sounder on the stone throwing pipe 50 to emit sound waves to detect the flatness of the crushed stone foundation bed, the detection method of driving the detection rod 41 to vertically descend and contact the crushed stone foundation bed in the embodiment of the present application can avoid the influence of the turbidity of the nearby water area, has stronger environmental adaptability, and further ensures the flatness detection accuracy of the crushed stone foundation bed and reduces the detection cost.

[0053] For the lifting control of the detection rod 41 on the fixing frame 10, in addition to the implementation means of using a reducer to drive the drum to wind and unwind the steel wire rope 31, allowing the detection rod 41 to descend under its own gravity, and pulling up the detection rod 41 through the steel wire rope 31.

[0054] The detection driver 30 can also actively drive the detection rod 41 to vertically lift and lower. For example, a motor and a gear set can also be selected to be arranged on the fixing frame 10. A rack is arranged at the upper end of the detection rod 41, and the rack is in transmission engagement with the output end of the gear set. When the motor drives the gear set, the gear set drives the rack, and then drives the detection rod 41, and the lifting action of the detection rod 41 can also be realized.

[0055] Moreover, a cylinder is provided on the fixing frame 10, and the output rod of the cylinder is connected to the upper end of the detection rod 41 to drive the lifting action of the detection rod 41 through the cylinder.

[0056] For the above two ways of controlling the lifting action of the detection rod 41, a sensor can be provided at the lower end of the detection rod 41. When the lower end of the detection rod 41 touches the surface of the crushed stone ridge, the sensor feeds back a signal to the main control module 20, so that the main control module 20 sends an instruction to control the motor or the cylinder to drive the detection rod 41 to rise and reset, completing a detection work.

[0057] When the detection rod 41 is used in the embodiment of the present application to detect the flatness of the surface of the crushed stone ridge, the multi-wave velocity detector 52 provided on the stone throwing pipe 50 can still emit sound waves to synchronously detect the flatness of the surface of the crushed stone ridge. The detection work of the two will not cause conflicts. Instead, through the comparison and analysis of the detection results of the two, the detection effect of the flatness of the crushed stone ridge can be further improved.

[0058] Second Embodiment

[0059] The difference between the embodiment of the present application and the first embodiment is that the displacement detection module 40 uses a wire-type displacement sensor, and the rest are the same, so details will not be described here. Specifically, the wire-type displacement sensor has a sensor element and a wire. The sensor element is arranged on the second bracket 102 and is electrically connected to the main control module 20. One end of the wire is connected to the sensor element, and the other end is connected to the detection rod 41.

[0060] The sensor element can convert the displacement of the wire into an electrical signal for measurement. The working principle of the sensor element is usually based on principles such as electromagnetic induction, resistance, capacitance, or optics. When the wire follows the movement of the detection rod 41, the sensor element will correspondingly generate an electrical signal. By measuring the changes in these signals, the displacement information of the detection rod 41 can be accurately obtained.

[0061] The sensor element obtains the displacement data of the wire following the movement of the detection rod 41 and feeds the displacement data back to the main control module 20. The displacement data of the wire obtained by the sensor element is the displacement data of the detection rod 41, thereby obtaining the flatness of the crushed stone ridge.

[0062] The above embodiments are only the preferred embodiments of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention belong to the protection scope required by the present invention.

Claims

1. A gravel bed flatness detection device, characterized in that, It includes a fixing frame, a main control module, a data processing module, a detection driver, a displacement detection module and a detection rod arranged on the fixing frame. The fixing frame is fixedly connected to a stone-throwing pipe. The main control module is electrically connected to the data processing module, the detection driver and the displacement detection module. The detection driver is connected to the detection rod. The detection rod vertically descends under its own weight or driven by the detection driver to contact the surface of the crushed stone bed. The displacement detection module obtains the displacement data of the detection rod each time it descends, and feeds the obtained displacement data back to the main control module. The main control module transmits the displacement data to the data processing module and compares it with the set value pre-stored in the data processing module. If the displacement data is within the range of the pre-stored set value, the main control module controls the stone-throwing pipe to perform a leveling action according to the signal fed back by the data processing module.

2. The gravel bed flatness detection device according to claim 1, wherein, The fixing frame has a first bracket and a second bracket. The first bracket is horizontally arranged and fixedly connected to the stone-throwing pipe. The second bracket is vertically arranged and fixedly connected to the first bracket. The detection driver is arranged on the first bracket. The displacement detection module is fixedly arranged on the second bracket. The detection rod is movably arranged on the second bracket. The detection driver is connected to the detection rod through a steel wire rope. The displacement detection module is used to detect the displacement data of the detection rod vertically descending along the second bracket.

3. The flatness detection device for the crushed stone bed as described in claim 2, wherein, The second bracket is arranged as a hollow pipe. The detection rod is movably arranged inside the second bracket and moves up and down along the vertical direction of the second bracket.

4. The gravel bed flatness detection device according to claim 2, wherein, The detection driver is arranged as a reducer. A fixed pulley is arranged at the corner connection position of the first bracket and the second bracket. The output end of the reducer is connected to a reel around which a steel wire rope is wound. The steel wire rope is deflected by the fixed pulley and connected to the detection rod.

5. The gravel bed flatness detection device according to claim 2, characterized in that, The displacement detection module is arranged as a magnetic linear encoder. The magnetic linear encoder has a magnetic head and a magnetic scale. The magnetic head is arranged on the second bracket and electrically connected to the main control module. One end of the magnetic scale is connected to the magnetic head, and the other end is connected to the detection rod. The magnetic head obtains the displacement data of the magnetic scale following the movement of the detection rod and feeds the displacement data back to the main control module.

6. The flatness detection device for the crushed stone bed as described in claim 2, characterized in that, The displacement detection module is arranged as a wire-pulling type displacement sensor. The wire-pulling type displacement sensor has a sensor element and a wire. The sensor element is arranged on the second bracket and electrically connected to the main control module. One end of the wire is connected to the sensor element, and the other end is connected to the detection rod. The sensor element obtains the displacement data of the wire following the movement of the detection rod and feeds the displacement data back to the main control module.

7. The flatness detection device for the crushed stone bed as described in any one of claims 1-6, characterized in that, The detection rod is connected to a horizontally arranged contact plate. The upper surface of the contact plate is fixedly connected to the lower end of the detection rod. The lower surface of the contact plate is used to contact the crushed stone bed.

8. The gravel bed flatness detection device according to any one of claims 1-6, characterized in that, The detection rod is connected to a contact ball. The contact ball is arranged as a hemispherical shape. The cross-sectional part of the contact ball is fixedly connected to the lower end of the detection rod. The spherical part of the contact ball is used to contact the crushed stone bed.

9. The flatness detection device for the crushed stone bed as described in any one of claims 1-6, characterized in that, The detection driver drives the detection rod to descend at a displacement interval of 1 meter along the laying direction of the stone-throwing pipe to detect the flatness of the crushed stone bed.

10. The flatness detection device for the crushed stone bed as described in any one of claims 1-6, characterized in that, The stone throwing pipe is connected to a stone throwing driver, and the stone throwing driver is electrically connected to the main control module. An inclined angle leveling member is provided at the lower end of the stone throwing pipe. The stone throwing driver receives the feedback signal from the main control module and drives the stone throwing pipe to level the crushed stone bed along the laying direction through the inclined angle leveling member.

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