Geothermal well pipeline monitoring equipment
By using a vibration assembly to vibrate the geothermal well pipes and monitoring frequency changes to determine scale buildup, the problem of blockage and scaling in geothermal well pipes is solved. This achieves efficient and accurate monitoring and cleaning assessment, adapts to different pipe diameters, and reduces maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN COMM SURVEYING & DESIGN INST CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-24
AI Technical Summary
Geothermal well pipes are prone to blockage, and scaling problems affect the stability and economic utilization of geothermal resources. Traditional methods of judging water quality by visual inspection of water color or detection of water flow are not accurate enough.
A vibration excitation assembly is used to vibrate the geothermal well pipeline. The scale condition is determined by monitoring the changes in the vibration frequency of the pipeline. An AC control coil is used to generate a magnetic field to vibrate the pipeline, and the frequency change is detected by a probe.
It improves the accuracy of scaling judgment and the versatility of the equipment, reduces operating costs, avoids instrument corrosion, adapts to pipes of different diameters, and is simple and portable to operate.
Smart Images
Figure CN224162446U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pipeline monitoring technology, specifically to a geothermal well pipeline monitoring device. Background Technology
[0002] In the development and utilization of geothermal resources, traditional hydrothermal geothermal resources are typically extracted from underground hot water through drilling. After utilizing its thermal energy, the tailwater is reinjected into the underground reservoir to achieve water resource recycling. However, geothermal water generally contains dissolved calcium and magnesium ions. When groundwater is extracted from the high-temperature underground layer to the surface, the sudden drop in temperature leads to a decrease in solubility, thereby accelerating scaling. Especially in the utilization of medium- and high-temperature geothermal fluids, scaling has become one of the obstacles affecting its stability, economy, and sustainable development.
[0003] The general construction steps for geothermal resource utilization are as follows: first, drill a geothermal well, then run casing and insulation pipes. During geothermal resource utilization, a submersible pump is activated to pump underground hot water along the insulated pipes into the heating station. However, geothermal pipes are prone to blockages, the main hazards of which are: first, reduced geothermal utilization efficiency and increased maintenance costs; second, ineffective extraction and utilization of geothermal energy; and third, potential damage to the internal structure of the geothermal well, shortening its lifespan.
[0004] In addition, geothermal water can accelerate the corrosion and aging of the electronic components inside the flow meter, and scale can easily form on the sensor surface, resulting in a failure rate of the flow meter that is about 3 to 5 times higher than in a normal environment.
[0005] To address these issues, regular cleaning and maintenance of the pipes are necessary. High-pressure water is typically used to flush away impurities and scale, restoring the pipes' smooth flow. In practice, the need for cleaning is currently determined primarily by visually inspecting water color and monitoring water flow. However, this method is subjective due to varying human sensitivities to color intensity, leading to inaccurate judgments. Utility Model Content
[0006] The main purpose of this application is to provide a geothermal well pipeline monitoring device, which aims to solve the problem that traditional methods such as visually inspecting water color or detecting water flow can easily affect the accuracy of judging pipeline scaling.
[0007] The technical solution adopted in this application is as follows:
[0008] A geothermal well pipeline monitoring device, comprising:
[0009] The excitation assembly is used to induce periodic vibration in the pipe under test. The excitation assembly includes multiple coil assemblies, which are configured to encircle the pipe under test and are connected by a movable connection that locks their relative positions to each other.
[0010] A probe, configured to monitor the vibration frequency of the pipe under test;
[0011] The monitoring instrument body is connected to the probe and is used to process and display the vibration frequency of the pipe being tested.
[0012] Optionally, the coil assemblies are rotatably connected to each other, and the rotation axes around which each coil assembly is wound are parallel to each other.
[0013] Optionally, the coil assembly includes:
[0014] coil;
[0015] A shaft passes through the coil, and the coil rotates about the shaft;
[0016] An insulating sleeve is provided, which covers the surface of the coil.
[0017] Optionally, the two ends of the coil are provided with teeth, and adjacent coil assemblies mesh with each other through the teeth.
[0018] Optionally, a connecting piece is provided between adjacent coil assemblies, the connecting piece being located at both ends of the coil assembly and sleeved on the shaft.
[0019] Optionally, the shaft is provided with an anti-loosening nut for assembling the connecting piece and the coil onto the shaft.
[0020] Optionally, any of the coil assemblies described herein is coaxially provided with a U-shaped connecting frame, and the U-shaped connecting frame is integrally formed with a handle.
[0021] Optionally, the main body of the monitoring instrument is connected to the handle via a ball joint.
[0022] Optionally, the probe is equipped with multiple control buttons.
[0023] Optionally, the main body of the monitoring instrument is connected to an external power source via a power cord.
[0024] Compared with the prior art, the beneficial effects of this application are:
[0025] Since scale growth increases the local mass of geothermal well steel pipes, leading to a decrease in the natural frequency of vibration, the geothermal well pipeline monitoring device proposed in this application uses an AC control coil to generate a magnetic field that causes the geothermal well steel pipe to vibrate. The device judges the scale condition by detecting changes in the vibration frequency. Compared with traditional methods such as visually inspecting water color and detecting water flow, this device has the advantages of simple operation, low cost, and high monitoring accuracy. Attached Figure Description
[0026] Figure 1 A three-dimensional structural schematic diagram of the geothermal well pipeline monitoring equipment provided in the embodiments of this application;
[0027] Figure 2 A schematic diagram of the plan structure of the geothermal well pipeline monitoring equipment provided in the embodiments of this application.
[0028] Figure 3 This is a schematic diagram of the coil assembly.
[0029] Figure 4 This is a schematic diagram of the probe's structure;
[0030] Figure 5 A schematic diagram illustrating the usage status of the geothermal well pipeline monitoring equipment provided in this application embodiment.
[0031] Explanation of the labels in the attached drawings:
[0032] 1-Vibration assembly, 100-Coil assembly, 101-Coil, 102-Shaft, 103-Gear tooth, 104-Insulating sleeve, 105-Connecting piece, 106-Anti-loosening nut, 2-Probe, 201-On / Off switch, 202-Increase key, 203-Decrease key, 3-Monitor body, 4-U-shaped connecting frame, 5-Handle, 6-Ball joint connecting rod, 7-Power cord, 8-Signal cord. Detailed Implementation
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0035] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0037] See attached document Figure 1 As shown in the figure, this application provides a geothermal well pipeline monitoring device, including a vibration excitation component 1, a probe 2, and a monitoring instrument body 3. The vibration excitation component 1 is used to induce periodic vibration in the pipeline under test, the probe 2 is used to monitor the vibration frequency of the pipeline under test, and the monitoring instrument body 3 is electrically connected to the vibration excitation component 1 and the probe 2. The monitoring instrument body 3 adopts the Kunshan Qimai KMbalancerII+ vibration analyzer, which can perform simple signal processing to remove noise and interference components, improve the quality and accuracy of the signal, enhance the strength of the useful signal, and store the monitoring signal over time for later comparison and analysis. It is equipped with a touch screen display to show the vibration frequency of the pipeline under test. Understandably, geothermal well pipelines are made of steel pipes. As a metal material, steel pipes are a good vibration propagation medium. This application uses the excitation component 1 to vibrate the steel pipe, which can achieve a long propagation distance. The vibration frequency of the steel pipe at different locations is detected by the probe 2 and compared with the natural frequency of the steel pipe. Since the growth of scale increases the local mass of the geothermal well steel pipe, it leads to a decrease in the natural frequency of vibration. Therefore, if the monitored vibration frequency of the steel pipe is lower than the natural frequency, it indicates that scale has grown inside the steel pipe. If the vibration frequency is lower than the limit threshold, the inside of the geothermal well pipeline needs to be cleaned.
[0038] In this embodiment, as Figure 1As shown, the excitation assembly 1 includes multiple coil assemblies 100. The coil assemblies 100 are configured to surround the pipe under test, and the coil assemblies 100 form a movable connection that locks their relative positions. It can be imagined that the excitation assembly 1 consists of multiple coil assemblies 100 that can be opened and closed in a regular pattern. During monitoring, the coil assemblies 100 are first opened and then slowly closed to surround the pipe under test. The closed loop formed by the coil assemblies 100 is a regular polygon, so that the pipe under test located at the center of the excitation assembly 1 is uniformly stressed relative to each coil 101. The magnetic field generated by energizing the coil assemblies 100 causes the pipe under test to vibrate, and the probe 2 monitors the vibration frequency of the pipe under test.
[0039] In the above, the coil assemblies 100 are rotatably connected to each other, and the rotation axes around which each coil assembly 100 is wound are parallel to each other. Specifically, as shown... Figure 3 As shown, each coil assembly 100 includes a coil 101, a shaft 102, and an insulating sleeve 104. The shaft 102 passes through the central axis of the coil 101, and the coil 101 rotates around the shaft 102. The insulating sleeve 104 covers the surface of the coil 101 to ensure insulation safety. Additionally, gear teeth 103 are provided at both ends of each coil 101, and adjacent coil assemblies 100 mesh with each other through the gear teeth 103. Furthermore, connecting pieces 105 are provided between adjacent coil assemblies 100. One connecting piece 105 is provided at each end of the coil 101. The connecting pieces 105 have through holes, allowing them to be fitted onto the shaft 102. The shaft 102 is a headed screw, and an anti-loosening nut 106 is provided at one end of the shaft 102, which secures the connecting pieces 105 and the coil 101 to the shaft 102. As can be imagined, during monitoring, simply rotating any coil assembly 100 will allow the interaction between the gear teeth 103 to open and close the coil assemblies 100 in a regular manner, thereby surrounding and releasing the pipe under test. Since the coils 101 have the same number of turns and multiple sets surround the pipe, the electromagnetic induction of the pipe is more uniform, significantly increasing the output induced electromotive force and enhancing the anti-interference capability.
[0040] Of course, it's not hard to imagine that the excitation assembly 1 can adapt to pipes of different diameters by increasing or decreasing the number of coil assemblies 100. Specifically, by unscrewing the anti-loosening nut 106, two connecting pieces 105 can be added, increasing the interface of the coil assembly 100.
[0041] In addition, to facilitate the operation of excitation component 1, such as Figure 1 As shown, a U-shaped connecting frame 4 is provided on any coil assembly 100. The two ends of the U-shaped connector are also sleeved on the shaft 102 and are coaxially arranged with the coil assembly 100. A handle 5 is integrally formed on the U-shaped connecting frame 4.
[0042] At the same time, such as Figure 2 and Figure 4 As shown, the main body 3 of the monitor is equipped with a mounting bushing, and a ball joint rod 6 is also provided on the main body 3. The ball joint rod 6 is fixedly connected to the handle rod 5. The main body 3 can rotate in all directions through the ball joint rod 6, which facilitates the use of the main body 3. The main body 3 is connected to an external AC power supply through a power cord 7, and the main body 3 is connected to the probe 2 through a signal line 8. The probe 2 is equipped with multiple control buttons, including an on / off switch 201, an increase button 202, and a decrease button 203, for signal detection. Of course, the coil assembly 100 is connected to the AC power supply through multiple sets of wiring groups (not shown in the figure) so that AC current can be applied to the coil 101 to generate a magnetic field, causing the measured pipe to vibrate.
[0043] Based on the above, the monitoring method of the geothermal well pipeline monitoring equipment provided in this application embodiment is as follows:
[0044] S1: Obtain the natural frequency of the geothermal well pipeline (in a scale-free state);
[0045] When a new geothermal well pipeline is first installed, a monitoring test should be conducted to record the initial vibration frequency as a baseline. Subsequent periodic testing and comparison of vibration frequency changes will allow for accurate assessment of scale growth. However, since water flow and pump vibrations may interfere with the vibration frequency, during the initial test, a specific frequency that effectively distinguishes the geothermal well pipeline's own vibration frequency should be selected as a baseline by adjusting the voltage. Specifically, if the pump speed is low, a typical vibration frequency higher than that of the pump and water flow can be selected; if the pump speed is high, a typical vibration frequency between these frequencies should be chosen. If a distinction cannot be made, the pump can be turned off for testing to improve accuracy.
[0046] S2: Unpack the excitation assembly 1, place the pipe to be tested into the center of the coil assembly 100, install the connecting piece 105 to assemble the excitation assembly 1, and operate the handle 5 with one hand to tighten the coil assembly 100 to hold the pipe to be tested, while holding the probe 2 close to the pipe to be tested. The magnetic field generated by the alternating current in the coil 101 causes the pipe to vibrate, and the vibration frequency of the pipe to be tested is measured by the probe 2.
[0047] It is important to note that during monitoring, probe 2 should be kept at a certain distance from excitation assembly 1 to prevent coil assembly 100 from interfering with probe 2. Figure 5 As shown.
[0048] S3: Based on the comparison between the vibration frequency obtained from monitoring and the natural frequency, if the vibration frequency is lower than the fixed frequency and exceeds the preset threshold, it proves that the scale inside the pipe is thick and needs to be cleaned in time.
[0049] In summary, the geothermal well pipeline monitoring device proposed in this application has at least the following advantages:
[0050] First: This equipment uses AC power to control the coil to generate a magnetic field that causes the geothermal well steel pipe to vibrate. It then detects changes in the vibration frequency to determine the scale level. Compared to traditional methods that rely on visual inspection of water color or water flow, this method offers higher accuracy.
[0051] Secondly, this equipment can adapt to pipes of different diameters by increasing or decreasing the number of coil assemblies, exhibiting good versatility and flexibility. It can meet the actual needs of various geothermal well pipelines, thus broadening the equipment's application range.
[0052] Third: This device is designed as a handheld component, which is simple to operate and portable, making it convenient for operators to monitor different geothermal well pipeline locations. It is easy to promote and apply, and at the same time, it can avoid contact between the instrument and water during the monitoring process, thus avoiding the corrosive effects of water on the instrument.
[0053] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A geothermal well pipeline monitoring device, characterized in that, include: The excitation assembly is used to induce periodic vibration in the pipe under test. The excitation assembly includes multiple coil assemblies, which are configured to encircle the pipe under test and are connected by a movable connection that locks their relative positions to each other. A probe, configured to monitor the vibration frequency of the pipe under test; The monitoring instrument body is connected to the probe and is used to process and display the vibration frequency of the pipe being tested.
2. The geothermal well pipeline monitoring equipment according to claim 1, characterized in that, The coil assemblies are rotatably connected to each other, and the rotation axes around which each coil assembly revolves are parallel to each other.
3. The geothermal well pipeline monitoring equipment according to claim 1 or 2, characterized in that, The coil assembly includes: coil; A shaft passes through the coil, and the coil rotates about the shaft; An insulating sleeve is provided, which covers the surface of the coil.
4. The geothermal well pipeline monitoring equipment according to claim 3, characterized in that, The coil has teeth at both ends, and adjacent coil assemblies mesh with each other through the teeth.
5. The geothermal well pipeline monitoring equipment according to claim 3, characterized in that, A connecting piece is provided between adjacent coil assemblies, the connecting piece being located at both ends of the coil assembly and sleeved on the shaft.
6. The geothermal well pipeline monitoring equipment according to claim 5, characterized in that, The shaft is provided with an anti-loosening nut for assembling the connecting piece and the coil onto the shaft.
7. The geothermal well pipeline monitoring equipment according to claim 1, characterized in that, Each of the coil assemblies is coaxially provided with a U-shaped connecting frame, and a handle is integrally formed on the U-shaped connecting frame.
8. The geothermal well pipeline monitoring equipment according to claim 7, characterized in that, The main body of the monitoring instrument is connected to the handle via a ball joint.
9. The geothermal well pipeline monitoring equipment according to claim 1, characterized in that, The probe is equipped with multiple control buttons.
10. The geothermal well pipeline monitoring equipment according to claim 1, characterized in that, The main body of the monitoring instrument is connected to an external power source via a power cord.