Device and method for automatically controlling the elevation of underwater concrete pouring

Abstract

The application provides a device and method for automatically controlling the elevation of underwater concrete pouring, which comprises a frame provided with a power output mechanism, a hollow material collecting barrel connected with the frame and used for being placed in a pile hole with a controlled elevation, a feeding port provided at the bottom of the barrel for concrete to enter, the barrel being used for being installed at a designed top elevation position of the pile, a crank slider mechanism fixedly connected at the bottom of the barrel and having a top connected with an eccentric wheel mechanism, the top of the crank slider mechanism being lowered when the bottom of the crank slider mechanism is clamped with stones of the concrete, the eccentric wheel mechanism being connected at the input end with the power output mechanism and at the output end with the top of the crank slider mechanism through a connecting rope, the crank slider mechanism being reciprocatingly swung by the reciprocating movement of the connecting rope, and an alarm device used for sending an alarm signal. The application can improve the accuracy of the measurement result, increase the reliability of the measurement result and improve the efficiency of the measurement process.

Description

Technical Field

[0001] This invention belongs to the field of bored pile construction technology, specifically relating to a device and method for automatically controlling the underwater concrete pouring elevation. Background Technology

[0002] Drilled piles, as a hidden project in civil construction, typically have their top elevation located at the bottom of the foundation pit. When the pit is deep, especially exceeding 10 meters, deep voids appear at the top, resulting in low-elevation drilled piles. Currently, underwater concrete pouring construction relies primarily on manual measurement with measuring ropes, which is not only inaccurate but also time-consuming and labor-intensive. During the construction of low-elevation underwater drilled piles, under-pouring sometimes prevents reaching the design elevation, leading to serious quality issues. Furthermore, to ensure the quality of the pile top concrete, over-pouring of 0.8 to 1.0 meters is necessary. However, due to differences in measurement methods and skill levels, over-pouring can sometimes exceed 5.0 meters. This not only wastes concrete materials but also creates difficulties in excavation and incurs costs for pile head removal and transportation, significantly increasing project costs.

[0003] To address the aforementioned challenges related to controlling the underwater concrete pouring elevation, the main existing technologies include:

[0004] 1. Rope Measurement Technique: This method uses a measuring rope with a weight suspended at one end for measurement. When the rope can no longer descend, it is considered to have reached the concrete surface, and the concrete elevation is indirectly read. The main drawback of this method is that when the sediment returning from the bottom of the borehole is thick or the mud has a high specific gravity, the weight may not be able to contact the concrete, resulting in a large measurement error.

[0005] 2. Medium Sampling Technology: This method uses a straight rod with a ladle at one end, inserted to a specified depth to collect a sample. The medium in the ladle is then analyzed to comprehensively assess the concrete properties and determine whether the standard has been met. The main drawback of this measurement method is that when the top elevation of the cast-in-place pile is low, the ladle is easily covered by sediment, making it impossible to extract the concrete sample, resulting in low technical reliability.

[0006] 3. End Resistance Sensing Technology: This method utilizes a hollow straight rod with a fork at one end, inserted to a specified depth. The user judges whether the specified elevation has been reached by sensing the friction between the fork and the concrete aggregate. The main drawback of this method is that the fork is easily covered by sediment, preventing direct friction between the fork and the concrete aggregate, and the subjective perception may not match the actual situation.

[0007] In addition, the above technologies share a common drawback: they can only be implemented intermittently based on experience, the measurement results are uncontrollable, and the efficiency is low. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for automatically controlling the elevation of underwater concrete pouring, thereby improving the accuracy and reliability of measurement results and increasing the efficiency of the measurement process.

[0009] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0010] In a first aspect, the present invention provides a device for automatically controlling the elevation of underwater concrete pouring, comprising:

[0011] A frame, on which a power output mechanism is provided;

[0012] A hollow aggregate bin is connected to the frame and is used to be placed in the pile hole at the elevation to be controlled. The bottom of the aggregate bin is provided with an inlet for concrete to enter. The bottom plane of the aggregate bin base is used to be installed at the designed pile top elevation position.

[0013] The crank-slider mechanism is fixedly connected to the inside of the collection bucket at its bottom and connected to the eccentric wheel mechanism at its top. When the bottom of the crank-slider mechanism gets stuck with the concrete stones, the top limit position of the crank-slider mechanism will be lowered.

[0014] An eccentric wheel mechanism is provided, with its input end connected to a power output mechanism and its output end connected to the top of a crank-slider mechanism via a connecting rope. The reciprocating movement of the connecting rope pulls the crank-slider mechanism to oscillate back and forth.

[0015] An alarm device includes a tension spring, a tension sensor, and an alarm. The tension spring is connected between the connecting ropes. The tension sensor is located at both ends of the tension spring and is used to collect the tension of the tension spring. The alarm is connected to the tension sensor and is used to issue an alarm signal when the tension value collected by the tension sensor exceeds a preset value.

[0016] Furthermore, the power output mechanism is a roller chain transmission mechanism, including a motor, a roller chain, and an output wheel connected to the output gear of the motor via the roller chain.

[0017] Furthermore, the connecting rope is a steel wire rope.

[0018] Furthermore, the crank-slider mechanism includes a slider, a connecting rod, and a crank, which are installed in the inner cavity of the collection bucket;

[0019] The upper end of the slider is fixedly connected to the connecting rope, and the lower end is hinged to the connecting rod.

[0020] The other end of the connecting rod is hinged to one end of the crank, and the other end of the crank is hinged to the base of the collection bucket.

[0021] The crank-slider mechanism has four sets of connecting rods and four sets of cranks, which are evenly distributed in a horizontal circle.

[0022] Furthermore, the eccentric wheel mechanism includes:

[0023] The synchronous eccentric wheel is rotatably connected to the output wheel of the roller chain drive mechanism;

[0024] A damping spring is mounted on the frame;

[0025] The push rod has a groove on its left side, which is in tangential contact with the eccentric wheel to form a movable connection. The push rod also has a boss on its right side, which is embedded in the inner hole of the damping spring.

[0026] Furthermore, the connecting rope includes connecting rope A and connecting rope B;

[0027] One end of the tension spring is connected to the push rod via connecting rope A, and the other end is connected to the slider via connecting rope B and the guide wheel. The upper side of the push rod is fixedly connected to connecting rope A, the other end of connecting rope A is fixedly connected to one end of the tension spring, the other end of the tension spring is fixedly connected to connecting rope B, and the other end of connecting rope B is connected to the crank-slider mechanism.

[0028] Furthermore, the frame is provided with guide wheels; the connecting rope B horizontally passes over the aforementioned guide wheels and then vertically downwards at a 90° angle to connect to the crank-slider mechanism.

[0029] Furthermore, the alarm is installed on the upper part of the frame.

[0030] Furthermore, the collection bucket is connected to the frame via a conduit; the crank-slider mechanism and the eccentric wheel mechanism are connected to the tension spring via a connecting rope B disposed in the conduit.

[0031] The conduit is a hollow tube, and the connecting rope B passes vertically downward through the inner hole of the conduit and the collection bucket in sequence, reaching the inner cavity of the collection bucket.

[0032] Furthermore, the upper end of the conduit is nested in the horizontal seat hole of the aforementioned frame, and the lower end of the conduit has an internal thread; the upper end of the collection bucket has an inner hole and an external thread that is provided in the inner hole and mates with the internal thread, and the collection bucket can form a detachable threaded connection with the conduit.

[0033] Furthermore, the base of the aggregate bucket is provided with a cross-shaped aggregate inlet for collecting concrete, slurry and sediment.

[0034] The upper end of the aggregate bucket is provided with circumferentially distributed discharge holes for discharging and lifting mud during the concrete pouring process.

[0035] The aggregate bucket has two symmetrical discharge ports on its side for discharging sediment during concrete pouring.

[0036] In a second aspect, the present invention provides a method for automatically controlling the underwater concrete pouring elevation, based on the apparatus for automatically controlling the underwater concrete pouring elevation described in the first aspect, comprising:

[0037] The tensile limit X was set through on-site testing;

[0038] Install the frame, collection bucket, crank-slider mechanism, eccentric wheel mechanism and alarm device, and ensure that the bottom of the collection bucket is located at the designed pile top elevation;

[0039] When the power output mechanism is started, it drives the eccentric wheel mechanism to move back and forth. The connecting rope fixed to the eccentric wheel mechanism moves, which in turn causes the crank-slider mechanism to change.

[0040] When no concrete, i.e. only slurry, enters the movement area of ​​the crank and connecting rod, the deformation of the tension spring of the alarm device is only the initial deformation. At this time, the tension value of the tension sensor fixedly connected to both ends of the tension spring does not exceed the preset value X, and the alarm device is not activated. When concrete enters the movement area of ​​the alarm device, the entry and retention of large geometrically sized and incompressible stone particles will prevent the crank and connecting rod from reaching their limit positions, and the deformation of the tension spring will increase. At this time, when the tension value sensed by the tension sensor fixedly connected to the tension spring exceeds the preset value X, an alarm signal is issued, indicating that the concrete elevation has reached the design requirements, and reminding the user to stop pouring.

[0041] Furthermore, the tensile limit X is set through on-site testing, including:

[0042] When the power output mechanism is started, it drives the eccentric wheel mechanism to move back and forth. The connecting rope fixed to the eccentric wheel mechanism moves, which in turn causes the crank-slider mechanism to change.

[0043] Multiple sets of sediment and concrete were added to the aggregate bin, and the above steps were repeated to obtain the peak values ​​of the output signals of the tensile sensors for the multiple sets of sediment and concrete. The alarm condition of the alarm was set as follows: the input signal value is greater than X. X is the average of the median of the peak values ​​of the output signals of the tensile sensors for the multiple sets of sediment and the median of the peak values ​​of the output signals of the tensile sensors for the multiple sets of concrete.

[0044] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0045] 1. This invention uses the difference in hardness between gravel and sediment / mud as a judgment standard, effectively improving measurement accuracy and reliability. It uses the geometric shape characteristics of gravel, the core medium in concrete, as a prominent basis for identifying concrete. The detection device is quick to perceive and has obvious characterization, representing a qualitative leap in the control device and method for pile top elevation in underwater concrete pouring.

[0046] 2. The device of this invention has a simple overall structure and low cost. The aggregate bucket and the guide pipe are connected by a threaded connection, which is convenient for assembly and disassembly. When used to control concrete at different pile top elevations, only the installation height of the guide pipe needs to be adjusted or different guide pipes need to be replaced, without the need for a separate aggregate bucket, thus having wide adaptability.

[0047] 3. This invention can achieve automatic dynamic control: after installation, it can be started with one button without midway intervention. When the concrete reaches the design elevation, the device will automatically alarm, and the detection efficiency is greatly improved. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the underwater concrete elevation automatic control device of the present invention;

[0049] Figure 2 This application is Figure 1 AA section view in the middle;

[0050] Figure 3 This is a top view of this application.

[0051] In the diagram: 1. Frame; 2. Roller chain drive mechanism; 3. Push rod; 4. Damping spring; 5. Wire rope; 6. Tension spring; 7. Tension sensor; 8. Alarm; 9. Eccentric wheel; 10. Guide wheel; 11. Guide tube; 12. Collection bucket; 13. Slider; 14. Connecting rod; 15. Crank;

[0052] 1201, Cross-shaped material collection port; 1202, Material discharge port; 1203, Discharge and lifting hole. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0054] In the description of this embodiment, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. Example

[0055] like Figure 1 As shown, this embodiment provides a device for automatically controlling the underwater concrete pouring elevation, used during bored pile construction to achieve automatic control of the underwater concrete pouring elevation, including:

[0056] A frame 1 is provided, on which a roller chain drive mechanism 2 is mounted. A seat hole is provided on the right side of the frame 1, and a damping spring 4 is installed in the seat hole. An alarm 8 is installed on the upper part of the frame 1, and a guide wheel 10 is installed on the left side of the frame 1. A synchronous eccentric wheel 9 is connected to the output wheel of the roller chain drive mechanism 2.

[0057] The push rod 3 has a groove on its left side, which is in tangential contact with the eccentric wheel 9 to form a movable connection. The push rod 3 has a boss on its right side, which is embedded in the inner hole of the aforementioned damping spring 4.

[0058] A steel wire rope 5A is fixedly connected to the upper side of the push rod 3. A tension spring 6 is fixedly connected to the other end of the steel wire rope 5A. Tension sensors 7 are fixedly connected to both ends of the tension spring 6. The tension sensors 7 are connected to the aforementioned alarm 8. The left side of the tension spring 6 is fixedly connected to the steel wire rope 5B. After the steel wire rope 5B horizontally passes over the aforementioned guide wheel 10, it reverses direction vertically downwards at a 90° angle.

[0059] The conduit 11 is a hollow tube. The upper end of the conduit 11 is nested in the horizontal seat hole of the aforementioned frame 1, and the lower end of the conduit 11 has internal threads.

[0060] The collection bucket 12 is cylindrical with an external threaded interface at the upper end, forming a detachable threaded connection with the aforementioned conduit 11. A cross-shaped collection port 1201 is arranged at the lower end of the collection bucket 12 for collecting concrete, slurry, and sediment. The upper end of the collection bucket 12 has circumferentially distributed discharge holes 1203 for discharging slurry during concrete pouring. Two symmetrical discharge ports 1202 are arranged on the side of the collection bucket 12, serving as discharge outlets for sediment during concrete pouring.

[0061] The aforementioned steel wire rope 5B passes vertically downward through the inner hole of the aforementioned guide tube 11 and the collection bucket 12, and reaches the inner cavity of the collection bucket 12.

[0062] A crank-slider mechanism, comprising a slider 13, a connecting rod 14, and a crank 15, is installed inside the aforementioned collection bucket 12. The slider 13 is fixedly connected to the aforementioned wire rope 5B and hinged to the connecting rod 14, which in turn is hinged to the crank 15, which is then hinged to the base of the aforementioned collection bucket 12.

[0063] The crank-slider mechanism has four sets of connecting rods 14 and four sets of cranks 15, which are evenly distributed in a horizontal circle.

[0064] The device includes a frame 1 on which a roller chain drive mechanism 2 is mounted. An eccentric wheel 9 is fixedly connected to the output wheel of the roller chain drive mechanism 2. Part of the rim of the eccentric wheel 9 is embedded in the groove of a push rod 3. A damping spring 4 is fixedly connected to the push rod 3 and is installed in the seat hole of the frame 1.

[0065] One end of the wire rope 5 is fixedly connected to the push rod 3, and the other end first passes over the guide wheel 10, then through the guide tube 11 and is fixedly connected to a crank-slider mechanism (including slider 13, connecting rod 14, and crank 15). A tension spring 6 is used to replace the connection in the middle section of the wire rope 5. A tension sensor 7 is fixedly connected to both ends of the tension spring 6, and the output signal of the tension sensor 7 is connected to an alarm 8.

[0066] The upper end of the conduit 11 is fixedly connected to the frame 1, and the lower end is threadedly connected to the collection bucket 12.

[0067] The slider 13 is hinged to the connecting rod 14, the connecting rod 14 is hinged to the crank 15, and the crank 15 is hinged to the base at the bottom of the collection bucket 12. There are four sets of connecting rods 14 and cranks 15, which are evenly distributed in a circle.

[0068] The roller chain drive mechanism 2 is the power input end of this device, and the crank 15 is the power output end of this device.

[0069] Implementation Principle: During use, install the aggregate bin 12 and the crank-slider mechanism, ensuring the bottom of the aggregate bin 12 is at the designed pile top elevation. Then, assemble the entire device and start the roller chain drive mechanism 2. The rotation of the eccentric wheel 9 drives the push rod 3 to move left and right reciprocally. The steel wire rope 5 and tension spring 6, fixedly connected to the push rod 3, move left and right as a whole. The slider 13, fixedly connected to the steel wire rope 5, moves up and down reciprocally. When the radial direction of the eccentric wheel 9 at the contact point with the push rod 3 gradually increases, the slider 13 rises under the traction of the steel wire rope 5. At this time, the connecting rod 14 and crank 15 tend to close, acting as a gripper. When the radial direction of the eccentric wheel 9 at the contact point with the push rod 3 gradually decreases, the slider 13 will descend due to its own weight, at which point the connecting rod 14 and crank 15 will release. When concrete enters the aggregate bin 12, due to the influx of coarse aggregate, the connecting rod 14 and crank 15 will not be able to close to their original limit position. At this point, the stroke of slider 13 will decrease, while the stroke of push rod 3, determined by eccentric wheel 9, remains unchanged. Under this condition, to ensure the normal operation of the entire device, the reduction in the stroke of slider 13 will be compensated by the extension of tension spring 6. The most significant characteristic of this is that the deformation of tension spring 6 will increase significantly, and the peak output of tension sensor 7 will also increase and exceed the X value, thereby triggering alarm 8 to issue an alarm signal. This alerts the operator that the designed pile top elevation has been reached. Example

[0070] like Figure 1 As shown, this embodiment provides an automatic control method for the underwater concrete pouring elevation during underwater concrete pouring construction of bored piles. Based on the automatic control device for underwater concrete pouring elevation described in Embodiment 1, it includes the following steps:

[0071] Commissioning Phase. First, install the collection bucket 12 and the crank-slider mechanism, ensuring the bottom of the collection bucket 12 is at the designed pile top elevation. Next, assemble the entire device and start the roller chain drive mechanism 2. The rotation of the eccentric wheel 9 drives the push rod 3 to move left and right reciprocally. The steel wire rope 5 and tension spring 6, fixedly connected to the push rod 3, move left and right as a whole. The slider 13, fixedly connected to the steel wire rope 5, moves up and down reciprocally. When the radial direction of the eccentric wheel 9 at the contact point with the push rod 3 gradually increases, the slider 13 rises under the traction of the steel wire rope 5. At this time, the connecting rod 14 and crank 15 tend to close, performing a gripping function. When the radial direction of the eccentric wheel 9 at the contact point with the push rod 3 gradually decreases, the slider 13 will descend due to its own weight, at which point the connecting rod 14 and crank 15 will release. Simultaneously, record the peak value of the output signal of the tension sensor 7.

[0072] Multiple sets of sediment and concrete were added to the aggregate bin, and the above steps were repeated to obtain the peak values ​​of the output signals of the tensile sensors 7 for multiple sets of sediment and concrete. The alarm condition of the alarm 8 was set as follows: the input signal value is greater than X. X is the average of the median of the peak values ​​of the output signals of the tensile sensors 7 for multiple sets of sediment and the median of the peak values ​​of the output signals of the tensile sensors 7 for multiple sets of concrete.

[0073] Taking advantage of the fact that the hardness of sediment is lower than that of the aggregate in concrete, the peak value of the output signal of the sediment tension sensor 7 is lower than that of the concrete tension sensor 7. This X value is set to prevent the sediment from increasing the resistance of the aggregate bucket and causing false triggering. At the same time, since the size of the aggregate or the position of it stuck on the connecting rod may vary, the peak value of the output signal of the concrete tension sensor 7 will also vary. Therefore, the average value of the midpoint of the peak values ​​of the output signals of multiple sets of sediment tension sensors 7 and the midpoint of the peak values ​​of the output signals of multiple sets of concrete tension sensors 7 is taken as the X value to prevent the detection device from not being triggered due to the difference in the aggregate in the concrete.

[0074] Additionally, it should be noted that the tension spring 6 in this application needs to be a spring with greater damping to at least ensure that the connecting rod can be driven to crush the sediment, that is, it can lift the slider containing sediment in the aggregate bucket to the top within the elastic force of the deformation range, but it cannot drive the connecting rod to crush the stones in the concrete, that is, it cannot lift the slider containing concrete (stones) in the aggregate bucket to the top within the deformation range, thus making the elastic force generated when in contact with concrete and sediment significantly different.

[0075] No alarm status. If the vertical stroke of the slider 13 inside the collection bucket 12 is large, and the crank 15 and connecting rod 14 can reach their extreme positions, then the tension on the wire rope 5 is small, the deformation of the tension spring 6 is small, and the output peak value of the tension sensor 7 is X, which cannot trigger the alarm 8 to issue an alarm signal. It can be determined that the material entering and exiting the collection bucket at this time is only sludge and mud, and the concrete has not yet entered the collection bucket 12. Concrete can continue to be poured.

[0076] Alarm status. When concrete enters the aggregate bin 12, due to the influx of coarse aggregate, connecting rod 14 and crank 15 will be unable to close to their original limit positions. At this time, the stroke of slider 13 will decrease, while the stroke of push rod 3, determined by eccentric wheel 9, will remain unchanged. Under this condition, to ensure the normal operation of the entire device, the reduction in the stroke of slider 13 will be compensated by the elongation of tension spring 6. The most significant characteristic of this is that the deformation of tension spring 6 will increase significantly, and the output peak value of tension sensor 7 will also increase and exceed the X value, thereby triggering alarm 8 to issue an alarm signal. This reminds the operator that the designed pile top elevation has been reached.

[0077] The key technical points of this application are:

[0078] When push rod 3 is in the rightmost position, that is, when slider 13 is at its highest point, the device is in its initial position. In the initial position of the device, the peak value of the output signal of tension sensor 7 is measured, which is the alarm threshold of alarm 8. In addition, it is recommended to measure multiple times by material group and take appropriate values, such as the minimum or median value of concrete and the maximum value of other materials (which can be used to distinguish concrete from other materials, or a fixed value can be set).

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A device for automatically controlling the elevation of underwater concrete pouring, characterized in that, include: A frame, on which a power output mechanism is provided; A hollow aggregate bin is connected to the frame and is used to be placed in the pile hole at the elevation to be controlled. The bottom of the aggregate bin is provided with an inlet for concrete to enter. The bottom plane of the aggregate bin base is used to be installed at the designed pile top elevation position. The crank-slider mechanism is fixedly connected to the inside of the collection bucket at its bottom and connected to the eccentric wheel mechanism at its top. When the bottom of the crank-slider mechanism gets stuck with the concrete stones, the top limit position of the crank-slider mechanism will be lowered. An eccentric wheel mechanism is provided, with its input end connected to a power output mechanism and its output end connected to the top of a crank-slider mechanism via a connecting rope. The reciprocating movement of the connecting rope pulls the crank-slider mechanism to oscillate back and forth. An alarm device includes a tension spring, a tension sensor, and an alarm. The tension spring is connected between the connecting ropes. The tension sensor is located at both ends of the tension spring and is used to collect the tension of the tension spring. The alarm is connected to the tension sensor and is used to issue an alarm signal when the tension value collected by the tension sensor exceeds a preset value. The crank-slider mechanism includes a slider, a connecting rod, and a crank, and is installed in the inner cavity of the collection bucket; The upper end of the slider is fixedly connected to the connecting rope, and the lower end is hinged to the connecting rod. The other end of the connecting rod is hinged to one end of the crank, and the other end of the crank is hinged to the base of the collection bucket. The crank-slider mechanism has four sets of connecting rods and four sets of cranks, which are evenly distributed in a horizontal circle. The eccentric wheel mechanism includes: The synchronous eccentric wheel is rotatably connected to the output wheel of the roller chain drive mechanism; A damping spring is mounted on the frame; The push rod has a groove on its left side, which is in tangential contact with the eccentric wheel to form a movable connection. The push rod also has a boss on its right side, which is embedded in the inner hole of the damping spring. The connecting rope includes connecting rope A and connecting rope B; One end of the tension spring is connected to the push rod via connecting rope A, and the other end is connected to the slider via connecting rope B and guide wheel; the upper side of the push rod is fixedly connected to the connecting rope A, the other end of the connecting rope A is fixedly connected to one end of the tension spring, the other end of the tension spring is fixedly connected to the connecting rope B, and the other end of the connecting rope B is connected to the crank-slider mechanism. The frame is equipped with guide wheels; the connecting rope B horizontally passes over the aforementioned guide wheels and then vertically downwards at a 90° angle to connect to the crank-slider mechanism.

2. The device for automatically controlling the underwater concrete pouring elevation according to claim 1, characterized in that, The power output mechanism is a roller chain drive mechanism, including a motor, a roller chain, and an output wheel connected to the output gear of the motor via the roller chain.

3. The device for automatically controlling the underwater concrete pouring elevation according to claim 1, characterized in that, The alarm is installed on the upper part of the frame; The collection bucket is connected to the frame via a conduit; the crank-slider mechanism and the eccentric wheel mechanism are connected to the tension spring via a connecting rope B disposed in the conduit; The conduit is a hollow tube, and the connecting rope B passes vertically downward through the inner hole of the conduit and the collection bucket in sequence, reaching the inner cavity of the collection bucket.

4. The device for automatically controlling the underwater concrete pouring elevation according to claim 3, characterized in that, The upper end of the conduit is nested in the horizontal seat hole of the aforementioned frame, and the lower end of the conduit has an internal thread; the upper end of the collection bucket has an inner hole and an external thread that is provided in the inner hole and mates with the internal thread, and the collection bucket can form a detachable threaded connection with the conduit.

5. The device for automatically controlling the underwater concrete pouring elevation according to claim 1, characterized in that, The base of the collection bucket is provided with a cross-shaped collection port for collecting concrete, slurry and sediment. The upper end of the aggregate bucket is provided with circumferentially distributed discharge holes for discharging and lifting mud during the concrete pouring process. The aggregate bucket has two symmetrical discharge ports on its side for discharging sediment during concrete pouring.

6. A method for automatically controlling the elevation of underwater concrete pouring, characterized in that, The device for automatically controlling the underwater concrete pouring elevation according to any one of claims 1-5 includes: The tensile limit X was set through on-site testing; Install the frame, collection bucket, crank-slider mechanism, eccentric wheel mechanism and alarm device, and ensure that the bottom of the collection bucket is located at the designed pile top elevation; When the power output mechanism is started, it drives the eccentric wheel mechanism to move back and forth. The connecting rope fixed to the eccentric wheel mechanism moves, which in turn causes the crank-slider mechanism to change. When no concrete, i.e. only slurry, enters the movement area of ​​the crank and connecting rod, the deformation of the tension spring of the alarm device is only the initial deformation. At this time, the tension value of the tension sensor fixedly connected to both ends of the tension spring does not exceed the preset value X, and the alarm device is not activated. When concrete enters the movement area of ​​the alarm device, the entry and retention of large geometrically sized and incompressible stone particles will prevent the movement of the crank and connecting rod from reaching the limit position, and the deformation of the tension spring will increase. At this time, when the tension value sensed by the tension sensor fixedly connected to the tension spring exceeds the preset value X, an alarm signal is issued, indicating that the concrete elevation has reached the design requirements, and reminding to stop pouring. The tensile limit X is set through on-site testing, including: When the power output mechanism is started, it drives the eccentric wheel mechanism to move back and forth. The connecting rope fixed to the eccentric wheel mechanism moves, which in turn causes the crank-slider mechanism to change. Multiple sets of sediment and concrete were added to the aggregate bucket, and the above steps were repeated to obtain the peak values ​​of the output signals of the tensile sensors for multiple sets of sediment and concrete. The alarm condition of the alarm was set as follows: the input signal value is greater than X; X is the average value of the median of the peak values ​​of the output signals of the tensile sensors for multiple sets of sediment and the median of the peak values ​​of the output signals of the tensile sensors for multiple sets of concrete.

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