Laser type water level gauge floater for water level variable-amplitude large-depth well logging

Abstract

A floater body is of a hollow conical structure, the edge of the bottom of the cone is in arc transition, a hollow connecting rod is vertically fixed to the top of the conical floater, and the other end of the connecting rod is connected with a balance weight device. An annular abrasion-resistant guide structure is embedded in the inner side of the round edge of the bottom of the conical floater, and the pasting face of the reflector of the floater is of a round structure matched with the inner wall of the conical logging well. And the problem of easy rollover is solved, so that the overhaul and maintenance cost of the equipment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waterway water level measurement technology, specifically to a laser-type water level gauge float for deep well logging with large water level variation. Background Technology

[0002] With the development of the national economy and society, the demand for clean energy is increasing. Hydropower, as a major force in clean energy, plays a crucial role in economic development. Large hydropower stations are generally built on major rivers. The dams of hydropower stations separate the upstream and downstream water levels, creating a water level difference that prevents ships from passing. Currently, both domestically and internationally, dams with small water level differences can be navigated through locks. However, with the increasing number of high-head dams, navigation through locks requires multiple lock stages, severely impacting navigation efficiency. Therefore, equipping high-head power stations with ship lifts can greatly improve navigation efficiency. Accurate water level measurement is particularly important during navigation. Therefore, high-precision and reliable water level gauges are needed to accurately measure the upstream and downstream water levels.

[0003] Laser reflective water level gauges, with their non-contact, high-precision, and strong anti-interference characteristics, are particularly suitable for complex hydrological environments (such as rivers containing silt) and space-constrained areas. They have become a key tool in modern water level monitoring systems to overcome traditional technical bottlenecks. The laser reflective water level gauge is equipped with a float with a reflector attached in the well logging. Most existing floats are square in shape, which cannot be adapted to the operating environment of cylindrical well logging. Due to the large fluctuations in water level and frequent waves in the waterway, the oscillation amplitude of the float in the well logging increases accordingly, and the float often capsizes, increasing the cost of equipment inspection and maintenance and seriously affecting navigation efficiency.

[0004] Therefore, it is necessary to invent a laser-type water level gauge float for deep well logging with large water level variation, which optimizes the reflector adhesive surface from the traditional square to a circle, perfectly adapts to the use environment of cylindrical well logging, and solves the problem of easy tipping over, thereby reducing the inspection and maintenance costs of the equipment. Utility Model Content

[0005] The purpose of this utility model is to provide a laser-type water level gauge float for deep well logging with large water level fluctuation, which optimizes the reflector bonding surface from the traditional square to a circle, perfectly adapting to the usage environment of cylindrical well logging, and solving the problem of easy tipping over, thereby reducing the inspection and maintenance costs of the equipment.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model discloses a deep well logging laser-type water level gauge float. The main body of the float is a hollow conical structure with a rounded transition at the bottom edge of the cone. A hollow connecting rod is vertically fixed to the top of the conical float, and the other end of the connecting rod is connected to a counterweight device. An annular wear-resistant guide structure is embedded in the inner side of the bottom circular edge of the conical float. The reflector adhesive surface of the float is a circular structure adapted to the inner wall of the conical well logging.

[0008] The conical structure reduces water flow resistance, and the rounded edges prevent collision with the logging wall, making it perfectly suited for the use environment of cylindrical logging. The wear-resistant guide ring is embedded in the bottom inner side to prevent the float from tipping over. The circular reflector is adapted to the inner wall of the cylindrical logging to ensure consistent laser reflection path and improve measurement accuracy.

[0009] Furthermore, the conical float and the reflector bonding surface adopt an integrated molding structure. A rigid skeleton mesh is pre-embedded on the inner surface of the reflector bonding surface. The skeleton mesh is woven from crisscrossing metal wires. The integrated design eliminates the complex structure of traditional support columns and bonding plates, reducing failure points. The skeleton mesh prevents the reflector from deforming due to long-term immersion or external force, ensuring the stability of the laser reflection angle and improving measurement accuracy.

[0010] Furthermore, the wear-resistant guide structure includes an annular guide rail embedded in the inner side of the bottom of the conical float. The outer surface of the guide rail is provided with a ceramic coating, and the inner edge of the guide rail is provided with an annular sealing groove filled with elastic sealing material. The ceramic coating reduces the friction coefficient between the guide rail and the logging wall, extending its service life. The sealing groove is filled with elastic material to ensure the watertightness of the float and prevent internal corrosion.

[0011] Furthermore, the counterweight device includes a columnar counterweight block fixed to the connecting rod. The vertical distance from the bottom of the counterweight block to the center of the bottom surface of the float is less than the vertical distance from the outer edge of the wear-resistant guide ring to the center of the bottom surface of the float, ensuring that the movement trajectory of the counterweight block does not overlap with the guide ring and preventing entanglement or jamming. By limiting the distance, the center of gravity of the float is always within the support range of the guide ring, enhancing the anti-overturning ability.

[0012] Furthermore, the hollow connecting rod is a thin-walled tubular structure with openings at both ends. Filter screens are provided at both ends of the connecting rod. The hollow design reduces the overall mass of the float and minimizes interference with the water flow in the well. The filter screens prevent mud or impurities from entering the interior of the connecting rod, thus avoiding air stagnation or center of gravity shift within the tube.

[0013] Furthermore, the outer surface of the conical float is provided with an anti-corrosion coating, the coating structure of which includes: an epoxy primer layer, a polyurethane intermediate layer and a fluorocarbon topcoat layer. The epoxy primer provides strong adhesion and rust prevention performance, the polyurethane layer enhances impact resistance, and the fluorocarbon topcoat is resistant to ultraviolet rays and chemical corrosion, adapting to the hydropower station environment containing silt or corrosive water quality, and reducing the frequency of maintenance.

[0014] Furthermore, the reflector's adhesive surface is provided with a concentric circle positioning structure, which includes a central positioning ring and at least three equidistant radial positioning strips. The positioning ring and positioning strips ensure that the reflector is centered and without skew, avoiding deviation of the laser reflection signal; and mechanical positioning replaces manual calibration, improving production efficiency.

[0015] Furthermore, the inner edge of the wear-resistant guide ring is provided with an annular buffer groove, in which an O-ring is embedded. After the O-ring is compressed, it fills the gap in the groove to prevent water from seeping into the float. The buffer groove provides deformation space for the sealing ring to adapt to the dynamic load when the float moves.

[0016] Furthermore, the counterweight device includes a detachable counterweight assembly, comprising: a basic counterweight block and at least two stacked counterweight rings. The inner wall of the counterweight rings is provided with a threaded connection structure, which allows the float's draft to be adjusted by adding or removing counterweight rings to adapt to different logging conditions. The threaded connection structure allows for quick assembly and disassembly without tools, reducing the difficulty of on-site debugging.

[0017] Additionally, the outer wall of the float is provided with at least three adjustable auxiliary guide devices in the circumferential direction. Each auxiliary guide device includes a support arm hinged to the outer wall of the float. The end of the support arm is provided with a guide wheel that rolls to contact the inner wall of the well. An elastic adjustment element is provided between the support arm and the outer wall of the float. The elastic adjustment element achieves radial extension and retraction adjustment through a spring or a rubber buffer block to adapt to well walls of different diameters and maintain the vertical rise and fall of the float.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] 1. The present invention relates to a deep well logging laser level gauge float, which optimizes the reflector bonding surface into a circular structure to form a uniform gap with the inner wall of the well. Combined with the conical body bottom arc transition design, it reduces water flow resistance, eliminates measurement errors caused by structural mismatch, and ensures stable reception of laser reflection signals.

[0020] 2. This utility model achieves a breakthrough improvement in dynamic stability through the coordinated design of the bottom counterweight device and the wear-resistant guide ring.

[0021] 3. The guide ring of this utility model has a ceramic coating on its outer surface and the float is coated with a composite coating of epoxy primer, polyurethane intermediate layer and fluorocarbon topcoat. This design greatly extends the service life of the equipment. Attached Figure Description

[0022] Figure 1 This is a front view of a deep well logging laser level gauge float according to this utility model;

[0023] Figure 2 This is a perspective view of the present invention.

[0024] Reference numerals: 1-Float, 2-Connecting rod, 3-Counterweight, 4-Wear-resistant guide ring, 5-Skeleton mesh. Detailed Implementation

[0025] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0027] like Figure 1 and Figure 2 As shown, this utility model achieves reliable operation under complex deep logging conditions through systematic structural optimization. Specific implementation features are as follows:

[0028] I. Corrosion resistance:

[0029] The main body of float 1 is integrally formed from high-quality stainless steel. The reflector support structure has a built-in rigid skeleton mesh 5, which is bonded to the float 1 body through a vacuum adsorption process to form a load-bearing base that combines lightweight and high strength. The anti-corrosion coating adopts a multi-layer composite structure, with a high-adhesion epoxy resin as the bottom layer, an elastic polyurethane material as the middle layer, and a weather-resistant fluorocarbon coating as the top layer. This triple protection system effectively resists the erosion of underwater humid environments and corrosive substances.

[0030] II. Design based on fluid mechanics:

[0031] The float 1 has a hollow conical body with a large rounded transition at the bottom edge. This design, optimized for fluid dynamics, significantly disperses water flow impact and reduces motion resistance. The hollow connecting rod 2, vertically mounted at the top, uses a thin-walled tubular structure with permeable channels at both ends. This ensures the smooth expulsion of air from the tube and improves the stability of the float 1 by lowering the overall center of gravity. The counterweight 3 assembly is rigidly connected to the end of the connecting rod 2, forming a vertical force-bearing system that ensures the float 1 maintains a vertical lifting posture.

[0032] III. Guidance System:

[0033] A wear-resistant annular guide ring 4 is embedded on the inner bottom of float 1, and its outer surface is covered with a high-hardness ceramic coating, forming a low-friction sliding contact with the well wall. The inner edge of the wear-resistant guide ring 4 is equipped with an elastic sealing structure to prevent water infiltration while maintaining reliable contact with the well wall. An auxiliary guiding device is arranged circumferentially along the outer wall of float 1. Each guiding unit includes an adjustable support arm and a rolling guide wheel. The support arm is connected to the float 1 body through an elastic buffer assembly, adapting to different well diameter changes and maintaining a vertical movement trajectory.

[0034] IV. Assembly:

[0035] The rigid frame mesh 5 is pre-embedded on the back of the reflector's adhesive surface using a three-dimensional weaving process, and is integrally formed with the float 1 body through a molding process. The reflector positioning structure features a concentric circular reference ring and radial positioning strips to ensure precise alignment of the reflective elements. The wear-resistant guide ring 4 is installed using an interference fit process, and the joints are filled with high-performance sealing material to form a double waterproof barrier. The counterweight 3 system adopts a modular design; the basic counterweight block and the stacked counterweight rings are quickly assembled and disassembled via a threaded structure to adapt to the buoyancy adjustment needs of different measurement scenarios.

[0036] V. Performance Verification:

[0037] The device underwent long-term operation testing in a simulated logging environment, verifying its adaptability under complex conditions such as water flow impact, corrosive media, and well diameter variations. Test results showed that the wear of the wear-resistant guide ring 4 was controllable, the reflector maintained excellent flatness, and the permeable channels of the connecting rod 2 showed no blockage. During on-site installation, a laser alignment device ensured high-precision alignment of the float 1 axis with the logging centerline. The modular design of the counterweight 3 component supported rapid adjustment, meeting the measurement requirements of liquid environments with different densities.

[0038] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A laser-type water level gauge float for deep well logging with large water level amplitude, characterized in that: The float (1) has a hollow conical structure with a rounded transition at the bottom edge of the cone. A hollow connecting rod (2) is vertically fixed at the top of the float (1), and a counterweight (3) is connected to the other end of the connecting rod. An annular wear-resistant guide ring (4) is embedded on the inner side of the bottom circular edge of the float (1). The float also includes a reflector adhesive surface (11), which is a circular structure adapted to the inner wall of the conical logging well.

2. The float according to claim 1, characterized in that: The float (1) and the reflector bonding surface adopt an integrated molding structure. A rigid skeleton mesh (5) is pre-embedded on the inner surface of the reflector bonding surface. The skeleton mesh (5) is woven from interlaced metal wires.

3. The float according to claim 1, characterized in that: The wear-resistant guide ring (4) is an annular guide rail embedded in the inner side of the bottom of the float (1), and the outer surface of the wear-resistant guide ring (4) is provided with a ceramic coating.

4. The float according to claim 1, characterized in that: The counterweight (3) is a columnar counterweight block fixed to the connecting rod. The vertical distance from the bottom of the counterweight (3) to the center of the bottom surface of the float is less than the vertical distance from the outer edge of the wear-resistant guide ring (4) to the center of the bottom surface of the float (1).

5. The float according to claim 1, characterized in that: The connecting rod (2) is a thin-walled tubular structure with openings at both ends, and filter screens are provided at both ends of the connecting rod (2).

6. The float according to claim 1, characterized in that: The outer surface of the float (1) is provided with an anti-corrosion coating, the coating structure of which includes an epoxy primer layer, a polyurethane intermediate layer and a fluorocarbon topcoat layer.

7. The float according to claim 1, characterized in that: The reflector adhesive surface (11) is provided with a concentric circle positioning structure, which includes a central positioning ring and at least three equidistant radial positioning strips.

8. The float according to claim 1, characterized in that: The wear-resistant guide ring (4) has an annular buffer groove on its inner edge, and an O-ring is embedded in the groove.

9. The float according to any one of claims 1-8, characterized in that: The counterweight (3) includes a detachable counterweight assembly, which includes a basic counterweight block and at least two stacked counterweight rings, with a threaded connection structure on the inner wall of the counterweight rings.

10. The float according to claim 1, characterized in that: The float (1) is provided with at least three adjustable auxiliary guide devices circumferentially on its outer wall. The auxiliary guide device includes a support arm hinged to the outer wall of the float, and a guide wheel that rolls to contact the inner wall of the well logging at the end of the support arm. An elastic adjustment element is provided between the support arm and the outer wall of the float.

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