A GIL Expansion Joint Status Monitoring Simulation Device

Abstract

The present invention discloses a GIL expansion joint state monitoring simulation device, which includes a GIL expansion joint simulation structure, a GIL pipeline housing, a fixed clamp, a support rod, a strain rod, a strain gauge sensor, and a data acquisition device. The fixed clamp is clamped on the GIL pipeline housing on both sides of the GIL expansion joint simulation structure. One end of the support rod is fixed on the fixed clamp, and the other end is fixedly connected to the strain rod. The strain gauge sensor is attached to the strain rod, and the data acquisition device is connected to the strain gauge sensor. The present invention can realize the real-time monitoring and long-term monitoring of the state of the GIL expansion joint.

Description

Technical Field

[0001] The present invention relates to the field of GIL operation and maintenance detection, and particularly to a GIL expansion joint state monitoring simulation device. Background Art

[0002] Gas-insulated metal-enclosed transmission line (GIL) is an underground power transmission method, which has the advantages of safety, reliability, high efficiency, intensiveness, intelligence, large transmission capacity, low unit loss, flexible layout, high operation reliability, long service life, and being unaffected by external environmental factors. However, long-distance GIL is buried deep underground, and settlement, mechanical construction, etc. will cause mechanical deformation of GIL, which has a great impact on the mechanical and electrical reliability of GIL. The expansion joint is a key component of GIL, which is used to compensate for the length adjustment during the installation of GIL equipment and the thermal expansion and contraction caused by environmental temperature, thermal effect of operating equipment, etc. after GIL is put into operation, as well as the lateral, axial and angular displacements caused by factors such as foundation settlement and earthquake.

[0003] However, at present, only the settlement of the GIL pipe gallery is monitored by the method of laser ranging. However, due to the long distance of GIL and the large difference in mechanical states at different positions, it is difficult to effectively monitor the mechanical state of GIL. Monitoring the deformation state of the GIL expansion joint can effectively evaluate the mechanical state of GIL. However, there is currently no effective method for monitoring the state of the GIL expansion joint, and it is impossible to evaluate the mechanical hidden dangers of GIL caused by the long-term working deterioration of the expansion joint. Summary of the Invention

[0004] Object of the Invention: Aiming at the problems existing in the prior art, the present invention provides a GIL expansion joint state monitoring simulation device that can evaluate the hidden dangers caused by long-term deformation.

[0005] Technical Solution: The GIL expansion joint state monitoring simulation device described in the present invention is characterized by including a GIL expansion joint simulation structure, a GIL pipeline shell, a fixed clamp, a support rod, a strain rod, a strain gauge sensor, and a data acquisition device. The fixed clamp is clamped on the GIL pipeline shells on both sides of the GIL expansion joint simulation structure. One end of the support rod is fixed on the fixed clamp, and the other end is fixedly connected to the strain rod. The strain gauge sensor is attached to the strain rod, and the data acquisition device is connected to the strain gauge sensor.

[0006] Further, the GIL expansion joint simulation structure is specifically a corrugated pipe. The GIL pipe housing is specifically an aluminum pipe. The fixed clamp is specifically an annular clamp structure. A total of 4 connection ports are provided on the fixed clamp, and the distance between every two adjacent connection ports is 90 degrees. A support rod is fixed on each connection port of the fixed clamp, and a strain rod is fixed by every two support rods. The strain rod is an elastic steel rod. The strain rod is parallel to the GIL expansion joint simulation structure, and the spacing distance is fixed. The strain gauge sensor is a weld-free strain gauge, which is closely attached to the upper part of the strain rod. The data acquisition device includes a multi-channel acquisition module and a wired / wireless data transmission module.

[0007] Beneficial effects: Compared with the prior art, the significant advantages of the present invention are as follows: The present invention can convert the deformation state of the expansion joint into the deformation of the strain rod, effectively monitor the deformation state of the expansion joint, evaluate the influence of long-term changes on the expansion joint, guide the operation and maintenance of the GIL expansion joint, and can avoid the occurrence of power transmission system accidents caused by mechanical failures. Description of the Drawings

[0008] Figure 1 is a schematic radial structure diagram of the GIL expansion joint state monitoring simulation device provided by the present invention;

[0009] Figure 2 is Figure 1 the axial structure diagram of;

[0010] In the figure, 1 is the GIL expansion joint simulation structure, 2 is the GIL pipe housing, 3 is the support rod, 4 is the strain rod, 5 is the strain gauge sensor, 6 is the data acquisition device, and 7 is the fixed clamp. Specific Embodiments

[0011] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0012] This embodiment provides a GIL expansion joint state monitoring simulation device, as shown in Figure 1 and Figure 2 , including a GIL expansion joint simulation structure 1, a GIL pipe housing 2, a support rod 3, a strain rod 4, a strain gauge sensor 5, a data acquisition device 6, and a fixed clamp 7. The fixed clamp 7 is clamped on the GIL pipe housing 2 on both sides of the GIL expansion joint simulation structure 1. One end of the support rod 3 is fixed on the fixed clamp 7, and the other end is fixedly connected to the strain rod 4. The strain gauge sensor 5 is attached to the strain rod 4, and the data acquisition device 6 is connected to the strain gauge sensor 5.

[0013] Among them, the GIL expansion joint simulation structure 1 is specifically a corrugated pipe, which can achieve axial expansion and radial bending, etc. The length of the deformation area is 1 m, and the maximum deformation amount can reach 10 cm, and it is used to simulate the structure of the GIL expansion joint in actual engineering.

[0014] The GIL pipeline shell 2 is connected through the GIL expansion joint simulation structure 1, and can simulate the actual GIL gas chamber structure. It adopts an aluminum structure with a diameter of 88 cm and a thickness of 8 mm.

[0015] The fixed clamp 7 is a circular clamp structure, and its diameter ranges from 80 cm to 100 cm, and its size matches that of the GIL pipeline shell, and it can be fastened on the GIL pipeline shell 2. It has four connection ports, and the adjacent connection ports are separated by 90 degrees.

[0016] The support rod 3 is made of high-strength steel, and its elastic modulus is above 200 GPa. It is connected to the connection port on the fixed clamp 7 to ensure its vertical relationship with the GIL pipeline shell and no displacement will occur. One support rod 3 is fixed on each connection port of the fixed clamp 7.

[0017] The strain rod 4 is made of elastic steel, and its carbon content is in the range of 0.6%-0.9%. Its elastic modulus is low and it is easy to deform. It is connected to the GIL pipeline shell 2 through two support rods, is parallel to the GIL expansion joint simulation structure 1, and the spacing distance is fixed, so that it can generate the same deformation as the GIL expansion joint simulation structure 1.

[0018] The strain gauge sensor 5 adopts a solderless strain gauge 120-3AA, which is closely attached to the upper part of the strain rod. Using multiple strain gauge sensors can realize the detection of multiple positions of the strain rod.

[0019] The data acquisition device 6 adopts the Ankerui AF-HK100 / 4G data acquisition and transmission module, which is connected to the strain gauge sensor, and uses multi-channel data acquisition to simultaneously acquire the data of multiple strain gauge sensors.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly specified or limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

Claims

1. A GIL expansion joint state monitoring simulation device, characterized in that It includes a GIL expansion joint simulation structure, a GIL pipeline shell, a fixed clamp, a support rod, a strain rod, a strain gauge sensor, and a data acquisition device. The fixed clamp is clamped on the GIL pipeline shells located on both sides of the GIL expansion joint simulation structure. One end of the support rod is fixed on the fixed clamp, and the other end is fixedly connected to the strain rod. The strain gauge sensor is attached to the strain rod, and the data acquisition device is connected to the strain gauge sensor. There are a total of 4 connection ports on the fixed clamp, and the distance between every two adjacent connection ports is 90 degrees. One support rod is fixed on each connection port of the fixed clamp, and one strain rod is fixed by every two support rods. The strain rod is parallel to the GIL expansion joint simulation structure, and the spacing distance is fixed.

2. The GIL expansion joint status monitoring and simulation device according to claim 1, characterized in that: The GIL expansion joint simulation structure is specifically a corrugated pipe.

3. The GIL expansion joint state monitoring and simulation device according to claim 1, wherein: The GIL pipeline shell is specifically an aluminum pipeline.

4. The GIL expansion joint status monitoring and simulation device according to claim 1, characterized in that: The fixed clamp is specifically an annular clamp structure.

5. The state monitoring and simulation device for GIL expansion joints according to claim 1, wherein: The strain rod is an elastic steel rod.

6. A GIL expansion joint state monitoring simulation device according to claim 1, characterized in that: The strain gauge sensor is a weld-free strain gauge, which is closely attached to the upper part of the strain rod.

7. The GIL expansion joint status monitoring and simulation device according to claim 1, wherein: The data acquisition device includes a multi-channel acquisition module and a wired / wireless data transmission module.

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