Block type steel lining magnetic type joint meter

Abstract

The utility model discloses a block type steel lining magnetic type joint meter, which belongs to the technical field of energy storage engineering and comprises a main body sensor, an optical cable is connected onto the main body sensor, sliding measuring rods are arranged at two ends of the main body sensor, the two sliding measuring rods are respectively connected with two magnetic fixing devices, and each magnetic fixing device comprises a fixing shell. A magnet mounting frame is arranged in the fixed shell, the fixed shell is connected with the magnet mounting frame through a fixed rod, a magnet is arranged in the magnet mounting frame, a rotary switch is arranged on the outer side of the shell, and the rotary switch drives the magnet to rotate in the magnet mounting frame through a rotating shaft. Drilling or welding on the surface of the steel lining can be avoided, so that the integrity of the sealing steel lining is effectively protected, installation is convenient, and the construction period is greatly shortened.

Description

Technical Field

[0001] This utility model relates to a segmented steel-lined magnetically attached gap meter, belonging to the field of energy storage engineering technology. Background Technology

[0002] Expansion joint gauges are common monitoring devices in geotechnical engineering safety, primarily used to measure changes in expansion joints or cracks in different structures. The underground gas storage facility with a rock-lined cavity uses an integral steel plate as the material for the high-pressure gas sealing layer. To ensure the safety of the segmented sealed steel lining structure of the gas storage facility, safety monitoring of various items is required during the construction of the sealing structure. Monitoring the opening and closing degree at the joints of the segmented steel lining is essential and of paramount importance, serving as a crucial guarantee for the safety and reliability of the segmented steel lining under long-term operating conditions of the gas storage facility.

[0003] Existing gap gauges are generally installed on structural surfaces using methods such as bolting, welding, or gluing. These methods require significant time and manpower, especially in environments like underground gas storage facilities where confined spaces and complex conditions make installation even more difficult. Furthermore, when placing gap gauges on steel-lined sealing structures, bolting requires pre-drilling, which is not only time-consuming but can also damage the steel lining, affecting its integrity. In addition, since the chamber shape is typically circular, the sealing structure often includes curved surfaces. When using gluing to fix the gap gauges, the gauges may lack adaptability and fail to fit well to structures with different curvatures or surface conditions, leading to weak adhesion, gauge detachment, or inaccurate measurement data. Finally, conventional gap gauge installation methods require multiple people working together and specialized tools and equipment, which is clearly disadvantageous for rapid deployment.

[0004] Currently, the existing patent CN 19638838 describes a structural design for the gap gauge, which involves installing the gap gauge by creating oblique mounting holes in the segment body. However, this installation method alters the overall structural integrity, and the thickness of the sealing steel lining in underground gas storage facilities is typically on the order of millimeters to centimeters, making this gap gauge arrangement difficult to adopt. Furthermore, the conventional method of welding the gap gauges to the surface also carries the risk of damaging the sealing structure of the steel lining.

[0005] Patent CN 209147915 U proposes a magnetically attached three-dimensional mechanical gap gauge that uses a magnetically attached device to fix a digital dial gauge. However, in the high-pressure and high-humidity environment during the operation of underground gas storage facilities, the digital dial gauge suffers from problems such as rusting and inaccurate readings. Furthermore, the installation of this gap gauge device is essentially still fixed by drilling holes in the structural components, which still poses a risk of damaging the sealing structure for thin sealing steel liners. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a segmented steel-lined magnetic joint gauge that can avoid drilling or welding on the surface of the steel lining, thereby effectively protecting the integrity of the sealed steel lining, and is easy to install, greatly reducing the construction cycle.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A segmented steel-lined magnetically attached seam gauge includes a main sensor connected to an optical cable. Sliding probes are located at both ends of the main sensor, and each sliding probe is connected to a magnetically attached fixing device. Each magnetically attached fixing device includes a fixed housing containing a magnet mounting frame. The fixed housing and the magnet mounting frame are connected by a fixing rod. A magnet is located within the magnet mounting frame. A rotary switch is located on the outside of the housing, and the rotary switch drives the magnet to rotate within the magnet mounting frame via a rotating shaft.

[0009] The main sensor is wrapped with a silicon-based phase change material layer, and the optical cable passes through the silicon-based phase change material layer.

[0010] The fixed housing includes an outer housing, and an inner sealed cavity is provided inside the outer housing.

[0011] The outer shell is made of TC4 titanium alloy.

[0012] The inner sealing cavity is made of carbon steel.

[0013] The sliding probe and the magnetic fixing device are connected by welding.

[0014] The main sensor and the outer shell are fitted with a filler layer at the fixing point.

[0015] The magnet is a samarium cobalt magnet.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a segmented steel-lined magnetic joint gauge, in which two sliding measuring rods are respectively connected to two magnetic fixing devices. The magnetic fixing device includes a fixed housing, and a magnet mounting frame is set inside the fixed housing. The fixed housing and the magnet mounting frame are connected by a fixing rod. A magnet is set inside the magnet mounting frame. A rotary switch is set on the outside of the housing. The rotary switch drives the magnet to rotate inside the magnet mounting frame through a rotating shaft. By using magnetic fixing, it is possible to effectively avoid drilling holes or welding the joint gauge base on the steel lining surface, protecting the integrity of the sealed steel lining body, protective layer and anti-corrosion coating, and improving sealing reliability. In addition, it can adapt to complex curved steel linings, and the magnetic fixing device is equipped with a magnetic switch, which facilitates installation and disassembly during construction. This utility model can reduce the single-point installation time from 15 minutes of traditional joint gauge installation to about 2 minutes, thereby reducing the construction cycle and reducing construction costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a segmented steel-lined magnetic joint gauge according to the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0019] Figure 3 This is a structural schematic diagram illustrating a specific application of the present invention;

[0020] The reference numerals in the figure are as follows: 1-Main sensor; 2-Optical cable; 3-Sliding probe; 4-Silicon-based phase change material layer; 5-Magnet mounting frame; 6-Outer shell; 7-Filling layer; 8-Inner sealed cavity; 9-Magnet; 10-Rotary switch; 11-Fixing rod; 12-Block steel liner; 13-Seam structure. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the protection scope of the present invention.

[0022] Example 1

[0023] like Figure 1 and Figure 2As shown, this utility model discloses a segmented steel-lined magnetically attracted joint gauge, including a main sensor 1, an optical cable 2 connected to the main sensor 1, and sliding measuring rods 3 at both ends of the main sensor 1. The two sliding measuring rods 3 are respectively connected to two magnetically attracted fixing devices. The magnetically attracted fixing device includes a fixed housing, a magnet mounting frame 5 inside the fixed housing, and a fixed rod 11 connecting the fixed housing and the magnet mounting frame 5. A magnet 9 is installed inside the magnet mounting frame 5, and a rotary switch 10 is installed on the outside of the housing. The rotary switch 10 drives the magnet 9 to rotate within the magnet mounting frame 5 via a rotating shaft. This utility model achieves the attraction or release of the magnet 9 to the segmented steel lining by changing the magnetic field direction of the magnet 9 through the operation of the rotary switch 10, thereby realizing the closing (attracting) and opening (releasing) of the magnetically attracted fixing device. Figure 3 As shown, this utility model fixes the gap gauge by placing two magnetic fixing devices on two adjacent block steel liners 12 with a slit structure 13 between them, and then rotating the rotary switch 10 to make the magnetic fixing devices adhere to the block steel liners 12. During monitoring, the optical cable 2 of the main sensor 1 is connected to the data transmission system. Before the formal inflation stage of the gas storage tank, it is necessary to check whether the monitoring data of the main sensor is accurate.

[0024] like Figure 3 As shown, the specific use of this utility model of a segmented steel-lined magnetic joint gauge includes the following steps:

[0025] Step 1: Before installing the joint gauge, position it by using an integrated laser on the segmented steel lining and then precisely attach the joint gauge to the target position (positioning accuracy ±1mm).

[0026] Step 2: Install joint gauges at the structural joint locations of the sealing layer at 45°, 135°, 180°, 225°, 315°, and 360° (0° at the top of the hole) to monitor the real-time changes in the opening of the structural joints.

[0027] Step 3: Fix the magnetic joint gauge base to the steel plate and adjust the angle so that the direction of the joint gauge is orthogonal to the direction of the structural joint.

[0028] Step four: Plate the surface of the magnetic gap gauge with nickel or apply anti-corrosion paint (0.2mm thick) to improve the overall corrosion resistance of the structure.

[0029] Example 2

[0030] like Figure 1 and Figure 2 As shown, this utility model discloses a segmented steel-lined magnetically attached seam gauge, including a main sensor 1, an optical cable 2 connected to the main sensor 1, and sliding measuring rods 3 at both ends of the main sensor 1. The two sliding measuring rods 3 are respectively welded to two magnetically attached fixing devices, which are then fixed by drilling holes in the outer shell of the magnetically attached fixing devices. Figure 3 As shown, two magnetic fixing devices are magnetically attached to the segmented steel lining 12 to monitor the deformation of the joint structure 13 between the segmented steel lining 12 during the operation of the gas storage tank.

[0031] The main sensor 1 has a cylindrical titanium alloy housing (Φ80mm×60mm), which internally contains a vibrating wire unit, an FBG demodulation module, an MCU, and a power supply. The vibrating wire unit is a vibrating wire displacement gauge (range ±15mm, resolution 0.005mm), and the vibrating wire material is Invar (coefficient of thermal expansion 1.2×10⁻⁻⁻⁶). 6 / °C). The main sensor 1 is wrapped with a silicon-based phase change material layer 4, and the optical cable 2 passes through the silicon-based phase change material layer 4. Specifically, a paraffin-based PCM (phase change point 50°C) is embedded in the inner wall of the sensor housing to absorb heat during high-temperature periods and prevent thermal expansion of the main sensor 1.

[0032] The magnetic attraction fixing device includes a fixed housing, within which a magnet mounting frame 5 is disposed. The fixed housing and the magnet mounting frame 5 are connected by a fixing rod 11. A magnet 9 is disposed within the magnet mounting frame 5. A rotary switch 10 is disposed on the outside of the housing. The rotary switch 10 drives the magnet 9 to rotate within the magnet mounting frame 5 via a rotating shaft. This invention achieves the attraction or release of the magnet 9 to the segmented steel liner by operating the rotary switch 10 to change the direction of the magnetic field of the magnet 9, thereby realizing the closing (attraction) and opening (release) of the magnetic attraction fixing device. Figure 3 As shown, when the gap measuring device of this utility model is used, the two magnetic fixing devices are placed on two adjacent block steel liners 12 with gap structures 13 between them. Then, the rotary switch 10 is rotated to make the magnetic fixing devices attract onto the block steel liners 12, thereby fixing the gap measuring device.

[0033] Among them, magnet 9 uses samarium cobalt magnet (Sm2Co) 17 It can withstand temperatures up to 350°C and has a remanence temperature coefficient of -0.03% / °C (better than NdFeB's -0.12% / °C), avoiding demagnetization at high temperatures. At the same time, a Halbach array is designed to concentrate the magnetic field to the steel liner side, with a single-point magnetic attraction force ≥500N (still ≥300N at 80°C).

[0034] The fixed housing includes an outer housing 6, which is made of TC4 titanium alloy (tensile strength ≥900MPa) and has a wall thickness of 5mm. An inner sealed cavity 8 is provided inside the outer housing 6. The inner sealed cavity 8 is made of carbon steel and is used to protect the magnet 9 and conduct the magnetic field.

[0035] The inner sealed cavity 8 is provided with a filling layer 7, which is a buffer layer made of flexible polymer material. The filling layer 7 located at the fixing point between the main sensor 1 and the outer shell 6 can balance the pressure borne by the outer shell 6, thereby protecting the inner magnet material.

[0036] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A split steel lined magnetic joint meter characterized by: The application relates to a block type steel lining magnetic type joint meter, which comprises a main body sensor (1), an optical cable (2) connected to the main body sensor (1), two sliding measuring rods (3) arranged at two ends of the main body sensor (1), two magnetic attraction fixing devices connected with the two sliding measuring rods (3) respectively, a fixing shell, a magnet mounting frame (5) arranged in the fixing shell, a fixing rod (11) connecting the fixing shell and the magnet mounting frame (5), a magnet (9) arranged in the magnet mounting frame (5), and a rotary switch (10) arranged outside the shell, wherein the rotary switch (10) drives the magnet (9) to rotate in the magnet mounting frame (5) through a rotating shaft.

2. The split steel lined magnetic joint meter according to claim 1, wherein: The main body sensor (1) is wrapped with a silicon-based phase change material layer (4), and the optical cable (2) penetrates through the silicon-based phase change material layer (4).

3. The block type steel lining magnetic type joint meter according to claim 1, characterized in that: The fixing shell comprises an outer shell (6), and an inner sealing cavity (8) is arranged in the outer shell (6).

4. The split steel lined magnetic gap joint meter of claim 3, wherein: The material of the outer shell (6) is TC4 titanium alloy.

5. The segmented steel-backed magnetic gap strip of claim 3, wherein: The material of the inner sealing cavity (8) is carbon steel.

6. The segmented steel-backed magnetic gap strip of claim 1, wherein: The sliding measuring rod (3) and the magnetic attraction fixing device are welded.

7. The segmented steel-backed magnetic gap strip of claim 3, wherein: The main body sensor (1) and the outer shell (6) are provided with a filler layer (7) at the fixed position.

8. The segmented steel-backed magnetic gap strip of claim 1, wherein: The magnet (9) is a samarium-cobalt magnet.

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