Ultrasonic guided wave underground water level detection device

Abstract

The invention relates to the technical field of hydrogeological detection, and discloses an ultrasonic guided wave underground water level detection device which comprises an ultrasonic probe shell, a radio frequency assembly is arranged in the ultrasonic probe shell, and a probe rod assembly is arranged at the bottom of the ultrasonic probe shell. The probe rod assembly comprises a longitudinal wave coupling solid rod, a hollow connecting rod, a guided wave propagation hollow rod and a blade foot, the radio frequency assembly comprises an inner layer sleeve, a plurality of wire bundles are arranged in the inner layer sleeve, and the bottom of each wire bundle is fixedly connected with a phased array infinitesimal element. Ultrasonic longitudinal waves are transmitted through a phased array infinitesimal in an ultrasonic probe shell, so that the longitudinal waves repeatedly interfere in a longitudinal wave coupling solid rod to form cylindrical guided waves propagating along the inner wall of a guided wave propagation hollow rod, the cylindrical guided waves propagate to the deep part of a stratum and are reflected by underground water, and the infinitesimal receives and analyzes the propagation time of the reflected waves to calculate the water level depth. The problem that traditional drilling measurement and an electromagnetic method are low in detection efficiency is solved, and the water level detection accuracy and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogeological exploration, in particular to an ultrasonic guided wave underground water level detection device. BACKGROUND

[0002] Underground water level detection is a key link in hydrogeological research, water resource management and engineering construction, and its data accuracy and efficiency directly affect agricultural irrigation planning, urban water supply scheduling and geological disaster warning. Traditional detection methods are limited by technology and often face problems such as insufficient accuracy and cumbersome operation in complex strata (such as multi-fractured rock strata and soft sand layers). Therefore, an underground water level detection device based on ultrasonic guided wave technology has emerged, which forms a directional cylindrical guided wave through phased array control and combines a modular splicing structure to achieve efficient and accurate detection of different depths and complex strata, providing technical support for the development and protection of underground water resources.

[0003] Existing underground water level detection technologies mainly fall into three categories: first, a drilling invasive device that requires a drilling machine to pre-construct a drill hole, places a scale measuring rope, a pressure sensor and other elements into the hole, directly contacts the aquifer to measure the water level, and relies on the rigid connection of mechanical structures and manual reading; second, an electromagnetic induction device that emits low-frequency electromagnetic signals through a metal probe inserted into the ground, uses the difference in dielectric constant caused by changes in soil moisture content to invert the water level, and the core is the correlation model between electromagnetic parameters and moisture content; and third, an ordinary ultrasonic detection device that installs a single probe on the ground to emit spherical waves, calculates the depth based on the travel time of the reflected water level wave, and relies on the propagation characteristics of sound waves in air.

[0004] The existing technology has obvious deficiencies. The drilling invasive device requires a large amount of time and cost to construct a drill hole, and the single-hole detection period often takes several hours, and the drill hole is prone to collapse, resulting in secondary operations. The electromagnetic induction device is disturbed by soil salt and surface metal objects, and needs to be calibrated multiple times, with a single detection time of more than 30 minutes. The ordinary ultrasonic device has low efficiency due to the rapid attenuation of spherical waves, and needs to repeatedly emit signals at a depth of more than 10 meters. These problems make it difficult for existing technology to meet the needs of large-area and rapid underground water level survey. SUMMARY

[0005] In view of the deficiencies of the existing technology, the present application provides an ultrasonic guided wave underground water level detection device, which solves the problem of low efficiency of traditional drilling measurement and electromagnetic detection.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: an ultrasonic guided wave underground water level detection device, comprising an ultrasonic probe shell, a radio frequency assembly is arranged inside the ultrasonic probe shell, the radio frequency assembly is used to emit ultrasonic waves to detect the underground water level, a probe rod assembly is arranged at the bottom of the ultrasonic probe shell, and the probe rod assembly is used to provide a propagation channel for ultrasonic waves.

[0007] The probe rod assembly comprises a longitudinal wave coupling solid rod, a hollow connecting rod, a waveguide propagation hollow rod and a blade foot, a connecting assembly is arranged between the longitudinal wave coupling solid rod, the hollow connecting rod and the waveguide propagation hollow rod, and a disassembly assembly is arranged in the blade foot;

[0008] The radio frequency assembly comprises an inner sleeve, the inner sleeve is located inside the ultrasonic probe shell, a plurality of wire bundles are arranged inside the inner sleeve, the plurality of wire bundles are distributed in a circular array, a wire bundle shielding layer is fixedly connected to the top of each wire bundle, and a phased array microelement is fixedly connected to the bottom of each wire bundle.

[0009] Preferably, a matching layer is fixedly connected to the bottom of the ultrasonic probe shell, a microelement fixing seat is fixedly connected to the top of the matching layer, the microelement fixing seat is located below the wire bundle, the cable assembly comprises a wire fixing seat, a multi-conductor coaxial cable is fixedly connected to the bottom outer wall of the wire fixing seat, a probe sealing cover is fixedly connected to the bottom of the multi-conductor coaxial cable, and the probe sealing cover is fixedly connected to the top center position of the ultrasonic probe shell.

[0010] Preferably, the longitudinal wave coupling solid rod is fixedly connected to the bottom of the ultrasonic probe shell at the top center position, the longitudinal wave coupling solid rod is a solid section, the hollow connecting rod is located below the longitudinal wave coupling solid rod, the waveguide propagation hollow rod is located below the hollow connecting rod, and the hollow connecting rod and the waveguide propagation hollow rod are both hollow sections.

[0011] Preferably, the connecting assembly comprises a connecting ring, the connecting ring is fixedly connected to the bottom of the longitudinal wave coupling solid rod and the hollow connecting rod at the top, the top inner walls of the hollow connecting rod and the waveguide propagation hollow rod are both provided with a second embedded groove, and the outer wall of the connecting ring is slidably connected inside the second embedded groove.

[0012] Preferably, a plurality of protruding blocks are fixedly connected to the inner wall of the second embedded groove, the plurality of protruding blocks are distributed in a circular manner, a plurality of limiting holes are arranged on the outer walls of the two sides of the protruding blocks, the plurality of limiting holes are distributed in a straight line array, a plurality of first embedded grooves are arranged inside the connecting ring, the positions of the first embedded grooves are consistent with the positions of the protruding blocks, and the outer walls of the protruding blocks are slidably connected inside the first embedded grooves.

[0013] Preferably, the inner wall of the chimeric slot is provided with a plurality of clamping balls on both sides, the positions of the clamping balls are consistent with the positions of the limiting holes, the side walls of the plurality of clamping balls are fixedly connected with connecting plates, the connecting plates are slidably connected to the inside of the connecting ring, the side edges of the connecting plates are provided with return springs, the return springs are located in the inside of the connecting ring, one end of the return spring is fixedly connected to the side wall of the connecting plate, and the other end of the return spring is fixedly connected to the inside of the connecting ring.

[0014] Preferably, the bottom of the waveguide propagation hollow rod is fixedly connected with a connecting bottom plate, the connecting bottom plate is located above the blade foot, a connecting column is fixedly connected to the bottom center position of the connecting bottom plate, a plurality of locking holes are formed in the inside of the connecting column, and the locking holes are distributed in a circular manner.

[0015] Preferably, a connecting groove is formed in the top center position of the blade foot, the outer wall of the connecting column is slidably connected to the inner wall of the connecting groove, a spiral soil removal guide pattern and a plurality of guide holes are formed in the outer wall of the blade foot, the spiral soil removal guide pattern is located below the guide hole, the plurality of guide holes are distributed in a circular manner, and a sliding groove is formed in the inside of each guide hole.

[0016] Preferably, the disassembly assembly comprises a fixed column, the outer wall of the fixed column is fixedly connected to the inner wall of the guide hole, a plurality of limiting balls are slidably connected to one side of the inside of the fixed column, a pull handle is fixedly connected to one end of the fixed column, the limiting balls are distributed in a circular manner, a movable column is slidably connected to the inner wall of the fixed column, a receiving groove is formed in one side of the outer wall of the movable column, a limiting plate is fixedly connected to the outer wall of the movable column, the outer wall of the limiting plate is slidably connected to the inner wall of the fixed column, a limiting spring one is arranged on the side edge of the limiting plate, one end of the limiting spring one is fixedly connected to the inner wall of the fixed column, and the other end of the limiting spring one is fixedly connected to the side wall of the limiting plate.

[0017] Preferably, the outer wall of the hollow connecting rod and the waveguide propagation hollow rod is sleeved with a protective sleeve, the protective sleeve is used for accommodating a protection device, the outer wall of the protective sleeve is fixedly connected with fixed rings which are symmetrically distributed up and down, and the side walls of the fixed rings on both sides are fixedly connected with hanging rings.

[0018] The application provides an ultrasonic waveguide underground water level detection device.

[0019] 1. This invention involves workers using hoisting tools to lift the device into a pre-drilled hole and place it in a suitable position. The phased array micro-element inside the ultrasonic probe housing emits ultrasonic longitudinal waves. The phase interval of the micro-element is adjusted by the wire bundle, causing the longitudinal waves to repeatedly interfere within the longitudinal wave coupling solid rod, forming a cylindrical guided wave that propagates along the hollow connecting rod and the inner wall of the hollow rod. This wave propagates deep into the strata and is reflected by groundwater. The micro-element receives and analyzes the propagation time of the reflected wave to calculate the water level depth. By leveraging the advantages of ultrasonic waves, such as low attenuation and long propagation distance, it can quickly detect water levels, solving the problem of low efficiency in traditional borehole measurement and electromagnetic detection methods, and improving the accuracy and efficiency of water level detection.

[0020] 2. This invention allows workers to select the appropriate number of hollow connecting rods according to the task, align the top fitting groove of each rod with the bottom connecting ring of the longitudinal wave coupling solid rod, so that the fitting groove of the connecting ring is embedded into the protruding block of the fitting groove of the hollow connecting rod. The ball is squeezed, causing the connecting plate to retract and the spring to compress. After complete fitting, the spring pushes the ball into the limiting hole to complete the limiting. Multiple hollow connecting rods and the connection with the wave guide hollow rod are spliced ​​in sequence to achieve rapid splicing, solve the problem of tedious and time-consuming probe splicing, improve the efficiency of probe assembly and compatibility with drilling at different depths.

[0021] 3. This invention allows workers to use a long-handled push rod to penetrate the guide hole of the cutting edge, pushing the movable column inward, which in turn moves the limiting plate and the receiving groove. This causes the limiting ball to disengage from the locking hole and slide into the receiving groove, compressing the first limiting spring. With the help of the second limiting spring, the fixed column can be removed for disassembly. During installation, the connecting column is inserted into the connecting groove, and the second limiting spring inserts the fixed column into the guide hole. The movable column is then released, and the first limiting spring resets, pushing the movable column to make the limiting ball engage with the locking hole. This achieves the effect of quick disassembly and assembly of the cutting edge, solving the problem of traditional fixed cutting edge positions, which requires replacing the entire bottom of the device during maintenance, resulting in high costs and improving the maintenance efficiency of the device. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is an exploded view of the longitudinal wave coupling solid rod structure of the present invention;

[0024] Figure 3 This is an exploded view of the ultrasonic probe housing of the present invention;

[0025] Figure 4 This is a cross-sectional view of the ultrasonic probe housing of the present invention;

[0026] Figure 5 This is a schematic diagram of the phased array micro-element of the present invention;

[0027] Figure 6 This is a cross-sectional view of the hollow connecting rod of the present invention;

[0028] Figure 7 For the present inventionFigure 6 Enlarged view of point A;

[0029] Figure 8 This is a cross-sectional view of the cutting edge of the present invention;

[0030] Figure 9 For the present invention Figure 8 Enlarged view of point B;

[0031] Figure 10 This is a cross-sectional view of the fixed column of the present invention.

[0032] The components include: 1. Ultrasonic probe housing; 101. Inner sleeve; 102. Wire harness; 103. Wire harness shielding layer; 104. Phased array micro-element; 105. Matching layer; 106. Micro-element mounting base; 107. Probe sealing cover; 108. Wire harness mounting base; 109. Multi-conductor coaxial cable; 2. Longitudinal wave coupling solid rod; 3. Hollow connecting rod; 4. Waveguide hollow rod; 5. Cutting edge; 501. Spiral soil discharge guide pattern; 502. Connecting groove; 503. Guide hole; 504. Fixed post; 505. Limiting ball; 506. Movable post; 507. Limiting plate; 508. Receiving groove; 509. Limiting spring one; 510. Pull handle; 6. Connecting ring; 601. Fitting groove one; 602. Return spring; 603. Connecting plate; 604. Locking ball; 7. Fitting groove two; 701. Protrusion; 702. Limiting hole; 8. Connecting base plate; 801. Connecting post; 802. Locking hole; 9. Protective sleeve; 10. Fixed ring; 11. Hanging ring. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see the appendix Figure 1 - Appendix Figure 5This invention provides an ultrasonic guided wave groundwater level detection device, including an ultrasonic probe housing 1 made of 316L stainless steel. An internal radio frequency (RF) component is used to emit ultrasonic waves to detect the groundwater level. An inner sleeve 101, made of polytetrafluoroethylene (PTFE), is installed inside the RF component to fix and insulate the wire bundles 102. Multiple wire bundles 102, each consisting of multi-strand copper core wires with an insulating layer, are arranged in a circular array of 16 wires for transmitting electrical signals to a phased array micro-element 104. A wire bundle shielding layer 103, made of copper mesh braid, is welded to the top of each wire bundle 102 to shield against external electromagnetic interference and ensure stable signal transmission. A phased array micro-element 104, a piezoelectric ceramic plate, is welded to the bottom of each wire bundle 102 to convert the electrical signal into an ultrasonic longitudinal wave. This is existing technology and will not be described in detail here.

[0035] The cable assembly at the top of the ultrasonic probe housing 1 is used to transmit control signals and reflected wave signals. It includes a wire holder 108, which is made of nylon. A 7-core shielded multi-conductor coaxial cable 109, fixed to the bottom outer wall with sealant, is used to transmit multiple signals; this is existing technology and will not be described in detail here. A probe sealing cover 107, made of 316L stainless steel, is threaded to the bottom of the multi-conductor coaxial cable 109 and bolted to the center of the top of the ultrasonic probe housing 1 to seal the internal components of the probe.

[0036] The matching layer 105, which is made of epoxy resin, is fixed to the bottom of the ultrasonic probe housing 1 by adhesive bonding. It is used to match the acoustic impedance and reduce ultrasonic reflection loss. The micro-element fixing base 106, which is made of aluminum alloy and is fixed to the top of the matching layer 105 by adhesive bonding, is located below the wire bundle 102 and is used to fix the position of the phased array micro-element 104.

[0037] The probe assembly provides a propagation path for ultrasonic waves and includes a longitudinal wave coupling solid rod 2, a hollow connecting rod 3, a wave-guiding hollow rod 4, and a cutting edge 5. The longitudinal wave coupling solid rod 2 is a solid structure made of 45# steel, and its top center is fixedly connected to the bottom of the ultrasonic probe housing 1 by threads, which is used to efficiently couple the ultrasonic longitudinal wave to the subsequent rod components. The hollow connecting rod 3 is made of 304 stainless steel and is located below the longitudinal wave coupling solid rod 2. The waveguide hollow rod 4 is made of the same material and is located below the hollow connecting rod 3. Both are hollow sections used to guide the propagation of cylindrical guided waves. A connecting component is provided between the hollow connecting rod 3 and the waveguide hollow rod 4 to enable quick assembly, disassembly, and sealing between them. The cutting edge 5 has a disassembly component inside for easy replacement of worn cutting edge 5. The outer walls of the hollow connecting rod 3 and the waveguide hollow rod 4 are fitted with protective sleeves 9 made of high-density polyethylene to house and protect the components and prevent damage during transportation. The outer walls of the protective sleeve 9 are fixedly connected by injection molding with symmetrically distributed upper and lower fixing rings 10 made of ABS material. The side walls of the two fixing rings 10 are fixedly connected by adhesive with hanging rings 11 made of stainless steel to cooperate with the protective sleeve 9 to fix the equipment.

[0038] Please see the appendix Figure 6 - Appendix Figure 7 In a preferred embodiment of the present invention, a connecting assembly is used to achieve rapid connection and positioning between the longitudinal wave coupling solid rod 2, the hollow connecting rod 3, and the waveguide hollow rod 4. The connecting ring 6 is made of 304 stainless steel and its top is welded to the bottom of the longitudinal wave coupling solid rod 2 and the hollow connecting rod 3, for engagement with the fitting groove of the lower rod to achieve connection. The fitting groove 601 on the inner wall of the top of both the hollow connecting rod 3 and the waveguide hollow rod 4 is a U-shaped groove. Multiple circumferentially distributed protrusions 701, made of 45# steel, are fixedly connected to the inner wall by welding. These protrusions are used to embed into the fitting groove 601 of the connecting ring 6 for circumferential positioning, preventing relative rotation of the rods after connection. Multiple linearly arrayed limiting holes 702, circular holes, are opened on the outer walls of both sides of the protrusions 701 for axial locking with a retaining ball 604. The multiple fitting grooves 601 inside the connecting ring 6 are rectangular grooves, the number of which is the same as the protrusions 701, and their positions correspond one-to-one. The outer wall of the protrusion 701 is in clearance fit with the inner wall of the fitting groove 601, and it is slidably connected inside the fitting groove 601 to accommodate the protrusions 701 and guide the connection process.

[0039] Multiple retaining balls 604, made of bearing steel, are arranged on both sides of the inner wall of the fitting groove 601. Their positions correspond to the limiting holes 702, and they are used to engage with the limiting holes 702 to axially fix the connecting ring 6 and the rod. A connecting plate 603, made of 304 stainless steel, is welded to the sidewalls of the multiple retaining balls 604. The outer wall of the connecting plate 604 slides in fit with the groove inside the connecting ring 6, ensuring smooth movement of the retaining balls 604. A return spring 602, made of spring steel, is located on the side of the connecting plate 603 inside the connecting ring 6. One end is welded to the sidewall of the connecting plate 603, and the other end is welded to a spring seat inside the connecting ring 6. This provides continuous radial thrust to the retaining balls 604, ensuring a tight fit with the limiting holes 702.

[0040] Please see the appendix Figure 8 - Appendix Figure 10 In a preferred embodiment of the present invention, a connecting base plate 8 is fixedly connected to the bottom of the waveguide hollow rod 4 by welding. The connecting base plate 8 is made of 304 stainless steel plate and is located above the cutting edge 5, used to connect the waveguide hollow rod 4 and the cutting edge 5. The connecting post 801 integrally formed at the bottom center of the connecting base plate 8 is made of the same material and has multiple circumferentially distributed locking holes 802 inside, which are used to cooperate with the limiting ball 505 to fix the cutting edge 5.

[0041] The cutting edge 5 is forged from alloy structural steel and heat-treated. A cylindrical groove 502 is formed at the center of the top. The outer wall of the connecting column 801 is clearance-fitted with the inner wall of the groove 502, slidingly connected to the inner wall of the groove 502 to accommodate the connecting column 801 and achieve initial positioning. A spiral soil-discharging guide pattern 501 machined on the outer wall of the cutting edge 5 is located below the guide hole 503, used to cut and discharge surrounding soil during device lowering, reducing lowering resistance. Two guide holes 503 are symmetrically distributed on both sides of the outer wall of the cutting edge 5, used to install the fixing column 504 of the disassembly assembly. The disassembly assembly includes the fixing column 504, a 45# steel round rod. Its outer wall slides against the inner wall of the guide hole 503, slidingly connected to the inner wall of the guide hole 503, connecting the cutting edge 5 and the connecting column 801. A pull handle 510, made of the same material round steel, is welded to one end of the fixing column 504 for easy gripping and operation by the operator. Multiple circumferentially distributed limiting balls 505 are slidably connected to one side of the fixed post 504. Guide grooves for the sliding of the limiting balls 505 are formed inside the fixed post 504, with an outlet diameter slightly smaller than the diameter of the limiting balls 505. These grooves limit the range of movement of the limiting balls 505, preventing them from detaching from the fixed post 504. The limiting balls 505 are made of bearing steel and are primarily used to engage with the slots inside the locking holes 802 for locking. The movable post 506, slidably connected to the inner wall of the fixed post 504, is a No. 45 steel round rod. A receiving groove 508 is formed on one side of its outer wall; this groove is open, and its curvature is greater than the rolling curvature of the limiting balls 505, preventing the limiting balls 505 from getting stuck inside. This groove is used to accommodate the limiting balls 505 during disassembly. The limiting plate 507, made of Q235B steel, is welded and fixed to the outer wall of the movable column 506. Its outer wall slides in fit with the guide groove on the inner wall of the fixed column 504, thereby limiting the sliding distance of the movable column 506 and transmitting the spring force. The limiting spring 509 on the side of the limiting plate 507 is made of spring steel. One end of its spring is welded to the spring seat on the inner wall of the fixed column 504, and the other end is welded to the side wall of the limiting plate 507. It is used to provide a restoring force for the movable column 506 and ensure that the limiting ball 505 extends reliably.

[0042] Working Principle: Before using this ultrasonic guided wave groundwater level detection device, the device needs to be assembled. First, the operator selects an appropriate number of hollow connecting rods 3 according to the task requirements. Then, the fitting groove 7 at the top of the uppermost hollow connecting rod 3 is aligned with the connecting ring 6 at the bottom of the longitudinal wave coupling solid rod 2, so that the fitting groove 601 inside the connecting ring 6 is embedded into the protrusion 701 inside the fitting groove 7. At this time, the retaining balls 604 on both sides of the fitting groove 601 are squeezed by the outer wall of the protrusion 701, thereby bringing... The moving connecting plate 603 retracts, causing the return spring 602 to be compressed. After the fitting groove 601 and the protrusion 701 are fully fitted, the return spring 602 pushes the locking ball 604 into the limiting hole 702 on the side wall of the protrusion 701 to complete the limiting. In this way, multiple hollow connecting rods 3 and the connection between the bottom hollow connecting rod 3 and the wave guide hollow rod 4 can be spliced, thereby achieving the effect of quickly splicing multiple hollow connecting rods 3 and longitudinal wave coupling solid rod 2 and wave guide hollow rod 4.

[0043] After the ultrasonic guided wave groundwater level detection device is assembled, the staff uses hoisting tools to lift the device into a pre-drilled hole. After the device is placed in a suitable position, the phased array micro-element 104 inside the ultrasonic probe shell 1 begins to emit ultrasonic longitudinal waves. The phase interval of the phased array micro-element 104 is adjusted by the wire bundle 102, so that the ultrasonic longitudinal waves repeatedly interfere inside the longitudinal wave coupling solid rod 2, thereby forming cylindrical guided waves that propagate along the hollow connecting rod 3 and the inner wall of the wave-guided hollow rod 4. The cylindrical guided waves propagate along the hollow connecting rod 3 and the wave-guided hollow rod 4 into the deep strata. When they encounter groundwater, the cylindrical guided waves are reflected. The phased array micro-element 104 receives and analyzes the propagation time of the reflected waves, and then calculates the depth of the groundwater level. This achieves the effect of quickly detecting the depth of the groundwater level by utilizing the advantages of ultrasonic waves, such as low attenuation rate, long propagation distance, and large detection range.

[0044] During routine maintenance of the device, when the operator finds that the cutting foot 5 needs to be replaced, the operator uses a long-handled push rod to reach into the guide holes 503 on both sides of the cutting foot 5, pushing the movable column 506 inward. The movable column 506 drives the limiting plate 507 to move, which in turn causes the receiving groove 508 to move as well. The displacement of the receiving groove 508 causes the limiting ball 505, which was originally pressed into the locking hole 802 by the movable column 506, to lose its compression and slide into the receiving groove 508. At the same time, the displacement of the limiting plate 507 also causes the limiting spring 509 to be compressed. Personnel can use the pull handle 510 to remove the fixing post 504, and then the cutting foot 5 can be disassembled. During installation, the worker first inserts the connecting post 801 into the connecting groove 502, and then inserts the fixing post 504 into the guide hole 503 through the pull handle 510, so that one end of the fixing post 504 is inserted into the locking hole 802. Then, the movable post 506 is no longer squeezed, and the limit spring 509 returns to its original position and pushes the movable post 506 back to its original position, so that the limit ball 505 inside the receiving groove 508 extends out and gets into the groove inside the locking hole 802 to complete the locking, thereby achieving the effect of quick disassembly and assembly of the cutting foot 5.

Claims

1. An ultrasonic guided wave groundwater level detection device, comprising an ultrasonic probe housing (1), characterized in that, The ultrasonic probe housing (1) is equipped with a radio frequency component inside, which is used to emit ultrasonic waves to detect the groundwater level. The ultrasonic probe housing (1) is equipped with a probe rod assembly at the bottom, which is used to provide a propagation channel for ultrasonic waves. The probe assembly includes a longitudinal wave coupling solid rod (2), a hollow connecting rod (3), a waveguide propagation hollow rod (4), and a cutting edge (5). A connecting component is provided between the longitudinal wave coupling solid rod (2), the hollow connecting rod (3), and the waveguide propagation hollow rod (4). A disassembly component is provided inside the cutting edge (5). The radio frequency component includes an inner sleeve (101) located inside the ultrasonic probe housing (1). The inner sleeve (101) contains a plurality of wire bundles (102) arranged in a circular array. Each wire bundle (102) has a wire bundle shielding layer (103) fixedly connected to its top. Each wire bundle (102) has a phased array micro-element (104) fixedly connected to its bottom. The top of the ultrasonic probe housing (1) is provided with a cable assembly for transmitting control signals and reflected wave signals.

2. The ultrasonic guided wave groundwater level detection device according to claim 1, characterized in that, The ultrasonic probe housing (1) has a matching layer (105) fixedly connected to its bottom, and a micro-element fixing seat (106) fixedly connected to its top. The micro-element fixing seat (106) is located below the wire bundle (102). The cable assembly includes a wire fixing seat (108). A multi-conductor coaxial cable (109) is fixedly connected to the bottom outer wall of the wire fixing seat (108). A probe sealing cover (107) is fixedly connected to the bottom of the multi-conductor coaxial cable (109). The bottom of the probe sealing cover (107) is fixedly connected to the center of the top of the ultrasonic probe housing (1).

3. The ultrasonic guided wave groundwater level detection device according to claim 1, characterized in that, The longitudinal wave coupling solid rod (2) is fixedly connected to the bottom of the ultrasonic probe housing (1) at the top center position. The longitudinal wave coupling solid rod (2) is a solid section. The hollow connecting rod (3) is located below the longitudinal wave coupling solid rod (2). The waveguide hollow rod (4) is located below the hollow connecting rod (3). Both the hollow connecting rod (3) and the waveguide hollow rod (4) are hollow sections.

4. The ultrasonic guided wave groundwater level detection device according to claim 3, characterized in that, The connecting assembly includes a connecting ring (6), the top of which is fixedly connected to the bottom of the longitudinal wave coupling solid rod (2) and the hollow connecting rod (3). The inner walls of the top of the hollow connecting rod (3) and the wave guide hollow rod (4) are both provided with a fitting groove (7), and the outer wall of the connecting ring (6) is slidably connected to the inside of the fitting groove (7).

5. The ultrasonic guided wave groundwater level detection device according to claim 4, characterized in that, The inner wall of the fitting groove 2 (7) is fixedly connected with a plurality of protrusions (701), which are distributed in a circumferential shape. The outer walls of both sides of the protrusions (701) are provided with a plurality of limiting holes (702), which are distributed in a linear array. The connecting ring (6) is provided with a plurality of fitting grooves 1 (601), which are located at the same position as the protrusions (701). The outer wall of the protrusions (701) is slidably connected to the inside of the fitting grooves 1 (601).

6. The ultrasonic guided wave groundwater level detection device according to claim 5, characterized in that, Multiple retaining balls (604) are provided on both sides of the inner wall of the fitting groove (601). The positions of the retaining balls (604) are consistent with the positions of the limiting holes (702). A connecting plate (603) is fixedly connected to the side wall of each retaining ball (604). The outer wall of the connecting plate (603) is slidably connected to the inside of the connecting ring (6). A return spring (602) is provided on the side of the connecting plate (603). The return spring (602) is located inside the connecting ring (6). One end of the return spring (602) is fixedly connected to the side wall of the connecting plate (603), and the other end of the return spring (602) is fixedly connected to the inside of the connecting ring (6).

7. The ultrasonic guided wave groundwater level detection device according to claim 1, characterized in that, The bottom of the waveguide hollow rod (4) is fixedly connected to a connecting base plate (8), which is located above the cutting foot (5). A connecting column (801) is fixedly connected to the center of the bottom of the connecting base plate (8). Multiple locking holes (802) are opened inside the connecting column (801), and the locking holes (802) are distributed in a circular shape.

8. The ultrasonic guided wave groundwater level detection device according to claim 7, characterized in that, A connecting groove (502) is provided at the center of the top of the cutting edge (5). The outer wall of the connecting column (801) is slidably connected to the inner wall of the connecting groove (502). The outer wall of the cutting edge (5) is provided with a spiral soil discharge guide pattern (501) and two guide holes (503). The spiral soil discharge guide pattern (501) is located below the guide holes (503), and the two guide holes (503) are located on both sides of the outer wall of the cutting edge (5).

9. The ultrasonic guided wave groundwater level detection device according to claim 8, characterized in that, The disassembly assembly includes a fixed post (504), the outer wall of which is slidably connected to the inner wall of the guide hole (503). A pull handle (510) is fixedly connected to one end of the fixed post (504). Multiple limiting balls (505) are slidably connected to one side of the inner wall of the fixed post (504), and these limiting balls (505) are circumferentially distributed. A movable post (506) is slidably connected to the inner wall of the fixed post (504). One side of the outer wall of the movable post (506)... A receiving groove (508) is provided. A limiting plate (507) is fixedly connected to the outer wall of the movable column (506). The outer wall of the limiting plate (507) is slidably connected to the inner wall of the fixed column (504). A limiting spring (509) is provided on the side of the limiting plate (507). One end of the limiting spring (509) is fixedly connected to the inner wall of the fixed column (504), and the other end of the limiting spring (509) is fixedly connected to the side wall of the limiting plate (507).

10. The ultrasonic guided wave groundwater level detection device according to claim 1, characterized in that, The hollow connecting rod (3) and the waveguide hollow rod (4) are fitted with protective sleeves (9). The protective sleeves (9) are used to store the protective device. The outer wall of the protective sleeves (9) is fixedly connected with symmetrically distributed fixing rings (10). The side walls of the fixing rings (10) on both sides are fixedly connected with hanging rings (11).

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