Construction process of ground shielding layer for multi-condition simulation test platform of power transmission and transformation equipment

Abstract

This invention discloses a ground shielding layer construction process for a multi-condition simulation test platform for power transmission and transformation equipment, belonging to the field of power transmission and transformation. The construction process is based on a ground shielding layer construction device, including a foundation and a steel mesh. A trench is excavated in the foundation, and the steel mesh is installed within the trench. A ground frame assembly is also included, located within the trench. The ground frame assembly includes a transition frame, a positioning structure, and a bottom frame. The bottom frame is located on the bottom wall of the trench, and the steel mesh is laid on the bottom frame. The transition frame is located on the inner side wall of the trench. The positioning structure is located at the connection between the transition frame and the bottom frame. The four sides of the steel mesh are embedded in the grooves on the four sides of the bottom frame, and the positioning structure is used to position the steel mesh. This invention has the advantage of using the positioning structure to embed the four sides of the ground shielding layer composed of multiple steel meshes into the grooves on the four sides of the bottom frame for rapid installation, avoiding multiple welding positioning points.

Description

Technical Field

[0001] This invention relates to the field of power transmission and transformation, and more specifically, to the construction process of the ground shielding layer for a multi-condition simulation test platform for power transmission and transformation equipment. Background Technology

[0002] The transmission of electric current often leads to losses due to heat generation in the lines. Therefore, during transmission, voltage is increased through substations to reduce the current and minimize heat loss. High-voltage electricity is highly dangerous, and the target electrical appliance does not require such high voltage, necessitating voltage reduction through substations. Because multiple substations are required during current transmission, the process is called power transmission and transformation. Power transmission and transformation equipment operates in complex environments. The multi-condition simulation test platform for power transmission and transformation equipment developed by Xi'an Jiaotong University can simulate the operating conditions of power transmission and transformation equipment under various environments, thereby obtaining usage data for the equipment in different conditions and enabling better improvements.

[0003] A ground shielding layer needs to be installed on the site where the multi-condition simulation test platform for power transmission and transformation equipment is installed to shield against potential interference from magnetic fields generated by other equipment. The ground shielding layer mainly consists of steel mesh, which is laid in trenches excavated in the ground. Multiple steel mesh sections are then welded together using transition frames to position the shielding layer. However, during construction, the steel mesh needs to be welded to the transition frames at multiple points for fixation. Because of the numerous welding points and their non-simultaneous locations, construction workers need to invest more time and effort. Therefore, we propose a construction process for the ground shielding layer of the multi-condition simulation test platform for power transmission and transformation equipment. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] The purpose of this invention is to provide a construction process for the ground shielding layer of a multi-condition simulation test platform for power transmission and transformation equipment, so as to solve the problems mentioned in the background art.

[0006] 2. Technical Solution

[0007] The construction process of the ground shielding layer of the multi-condition simulation test platform for power transmission and transformation equipment is based on a ground shielding layer construction device. The ground shielding layer construction device includes a foundation and a steel mesh. The foundation is excavated into a trench, and the steel mesh is installed in the trench. The device also includes a ground frame assembly, which is located in the trench.

[0008] The ground frame assembly includes a transition frame, a positioning structure, and a bottom frame;

[0009] The bottom frame is located on the bottom wall of the foundation trench, and a steel mesh is laid on the bottom frame;

[0010] The adapter frame is disposed on the inner side wall of the foundation trench;

[0011] The positioning structure is located at the connection between the adapter frame and the bottom frame;

[0012] The steel mesh is embedded in the grooves on the four sides of the bottom frame, and the positioning structure is used to position the steel mesh.

[0013] The construction process for the ground shielding layer is as follows:

[0014] Preparation process:

[0015] S1. Construction surveying and marking: Before the formal construction, the surveyors will measure the ground at the site of the multi-condition simulation test platform for power transmission and transformation equipment according to the grounding system plan. After the measurement is completed, the excavation position of the grounding trench will be marked with lime to cooperate with the excavator to excavate the trench.

[0016] S2. Trench Excavation: Before trench excavation, the construction personnel confirm that the site elevation is -0.8m. If the site elevation meets the requirements, then according to the position of the lime, excavate 20 cm down, and the trench width is 30 cm, with a trench width error of ±1 cm.

[0017] S3. Flat steel laying and exothermic welding: After the trench is excavated on site, the construction personnel lay flat steel and steel pipes according to the trench direction. Professional technicians weld each welding part. For the welded joint, there should be no detachment, no false weld, and no porosity.

[0018] Ground shielding layer construction process:

[0019] S1. Install a bottom frame in the trench on site. The bottom end of the bottom frame contacts the bottom wall of the trench, and the four sides of the bottom frame contact the inner side wall of the trench.

[0020] S2. Lay multiple steel meshes on the bottom frame, with the steel meshes overlapping each other. The overlap width is not less than 100mm. The overlaps between the steel meshes are connected by spot welding with carbon dioxide shielded welding. The spot welding spacing is less than 50mm, forming a ground shielding layer. The four sides of the spot-welded ground shielding layer are embedded into the grooves on the four sides of the bottom frame.

[0021] S3. Weld the top of the positioning structure to the bottom of the adapter frame;

[0022] S4. Place the adapter frame on the bottom frame, and fit the positioning structure into the grooves on the four sides of the bottom frame. Position the four sides of the spot-welded ground shielding layer in the grooves on the four sides of the bottom frame, thereby laying the ground shielding layer flat and positioning it on the bottom frame.

[0023] S5. Pass the grounding electrode through the ground shielding layer composed of multiple steel mesh plates and weld it fully to the ground shielding layer.

[0024] S6. Clean up the construction site. No metal debris is allowed on the construction site.

[0025] Preferably, the positioning structure includes an insert block, a telescopic rod, a spring piece, a connecting strip, and a positioning block;

[0026] The top of the insert block is fixed to the bottom of the adapter frame, and a groove is provided on the inner side of the insert block;

[0027] The positioning block is slidably disposed within the groove;

[0028] The connecting strip is fixed to the vertical plane side of the positioning block;

[0029] The spring piece is fixedly disposed within the groove;

[0030] At least one of the telescopic rods is disposed between the inner sidewall of the groove and the sidewall of the connecting strip, and the extended end of the telescopic rod passes through the spring piece and is connected to the sidewall of the connecting strip;

[0031] The spring sheet adopts an arc-shaped structure design, with the arc-shaped end of the spring sheet facing the positioning block.

[0032] Preferably, the grooves on the four sides of the bottom frame are divided into insertion grooves and positioning grooves;

[0033] The positioning groove is located on the inner side of the four sides of the bottom frame, the insertion groove is located on the outer side of the four sides of the bottom frame, and the insertion groove is connected to the positioning groove; the insertion block is inserted into the insertion groove, and the positioning block is inserted into the positioning groove.

[0034] Preferably, the positioning block insertion end adopts an obtuse angle structure design, and the positioning block insertion end is adapted to the positioning groove.

[0035] Preferably, the excavated trench under the foundation is filled with backfill concrete.

[0036] 3. Beneficial effects

[0037] Compared with the prior art, the advantages of this invention are:

[0038] 1. This invention utilizes a positioning structure to connect the transition frame and the base frame. The positioning structure embeds the four sides of the ground shielding layer, composed of multiple steel mesh panels, into the grooves on the four sides of the base frame, enabling rapid installation and avoiding multiple welding points. This solves the problem of requiring multiple welding points between the steel mesh and the transition frame during construction, which, due to the numerous welding points and their non-simultaneous locations, necessitates more time and labor-intensive work for construction personnel.

[0039] 2. This invention incorporates a spring with an arc-shaped structure, where the arc-shaped end of the spring faces the positioning block. The elastic force of the arc-shaped spring is concentrated at the arc-shaped end, which faces the center of the vertical plane of the positioning block, thus providing a more stable elastic force and preventing the positioning block from becoming unstable.

[0040] 3. By setting a positioning block, after the obtuse-angled structure of the positioning block is inserted into the positioning groove, the two inclined sides of the obtuse-angled structure contact the inclined side of the inner sidewall of the positioning groove respectively, and the force is dispersed, so that the positioning effect of the positioning block is better. Attached Figure Description

[0041] Figure 1 This is a top view of the structure of the present invention;

[0042] Figure 2 This is a schematic diagram of the connection structure of the ground frame component of the present invention;

[0043] Figure 3 This is a schematic diagram of the bottom frame connection structure of the present invention;

[0044] Figure 4 For the present invention Figure 3 Enlarged view of point A;

[0045] Figure 5 This is a schematic diagram of the positioning structure of the present invention;

[0046] Explanation of the labels in the diagram:

[0047] 1. Foundation; 2. Backfill concrete; 3. Ground frame components; 4. Steel mesh;

[0048] 301. Adapter frame; 302. Positioning structure; 303. Base frame;

[0049] 3021, Insert block; 3022, Groove; 3023, Telescopic rod; 3024, Spring piece; 3025, Connecting strip; 3026, Positioning block;

[0050] 3031, Insertion slot; 3032, Positioning slot. Detailed Implementation

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] Please see Figures 1-5 The present invention provides a technical solution:

[0054] The construction process of the ground shielding layer of the multi-condition simulation test platform for power transmission and transformation equipment is based on a ground shielding layer construction device. The ground shielding layer construction device includes a foundation 1 and a steel mesh 4. The foundation 1 is excavated and a trench is dug. The steel mesh 4 is installed in the trench of the foundation 1. It also includes a ground frame component 3, which is set in the trench of the foundation 1.

[0055] The ground frame assembly 3 includes a transition frame 301, a positioning structure 302, and a bottom frame 303;

[0056] The bottom frame 303 is located on the bottom wall of the groove in the foundation 1. The four sides of the bottom frame 303 are formed by welding two long and two short horizontal steel plates in pairs. A steel mesh 4 is laid on the bottom frame 303, and multiple steel meshes 4 are welded together to form a ground shielding layer.

[0057] The adapter frame 301 is located on the inner side wall of the slot in the foundation 1. The four sides of the adapter frame 301 are formed by welding two long and two short vertical steel plates in pairs. The adapter frame 301 is in contact with the inner side wall of the slot in the foundation 1.

[0058] The positioning structure 302 is located at the connection between the adapter frame 301 and the bottom frame 303;

[0059] In this invention, the steel mesh 4 is embedded in the grooves on the four sides of the base frame 303, and the positioning structure 302 is used to position the steel mesh 4. Through the connection of the adapter frame 301 and the base frame 303, the positioning structure 302 is used to embed the four sides of the ground shielding layer composed of multiple steel meshes 4 into the grooves on the four sides of the base frame 303 for quick installation, avoiding multiple welding points for positioning. This solves the problem that during construction, multiple welding points are required between the steel mesh and the transition frame for fixation, resulting in numerous welding points and inconsistent welding locations, leading to increased construction time and labor intensity for workers.

[0060] The construction process for the ground shielding layer is as follows:

[0061] Preparation process:

[0062] S1. Construction surveying and marking: Before the formal construction, the surveyors will measure the ground at the site of the multi-condition simulation test platform for power transmission and transformation equipment according to the grounding system plan. After the measurement is completed, the excavation position of the grounding trench will be marked with lime to cooperate with the excavator to excavate the trench.

[0063] S2. Trench Excavation: Before trench excavation, the construction personnel confirm that the site elevation is -0.8m. If the site elevation meets the requirements, then according to the position of the lime, excavate 20 cm down, and the trench width is 30 cm. The trench width error is ±1 cm to facilitate the construction needs of the welding personnel.

[0064] S3. Flat steel laying and exothermic welding: After the trench is excavated on site, the construction personnel lay flat steel and steel pipes according to the trench direction. Professional technicians weld each welding part. For the welded joint, there should be no detachment, no false weld, and no porosity.

[0065] Ground shielding layer construction process:

[0066] S1. Based on the dimensions of the ground trench at the site of the multi-condition simulation test platform for power transmission and transformation equipment, two long and two short horizontal steel plates are welded together to form a bottom frame 303. The bottom frame 303 is installed in the trench, with the bottom end of the bottom frame 303 contacting the bottom wall of the trench and the four sides of the bottom frame 303 contacting the inner sidewall of the trench.

[0067] S2. Lay multiple steel mesh 4s on the bottom frame 303. The steel mesh 4s overlap each other with an overlap width of not less than 100mm. The overlaps of the steel mesh 4s are connected by spot welding with carbon dioxide shielded welding with a spot welding spacing of less than 50mm to form a ground shielding layer. The four sides of the spot-welded ground shielding layer are embedded into the grooves on the four sides of the bottom frame 303, and the steel mesh 4s are laid flat.

[0068] S3. Weld the top of the positioning structure 302 to the bottom of the adapter frame 301, and symmetrically weld two positioning structures 302 to the bottom of the two long and two short vertical steel plates respectively.

[0069] S4. The adapter frame 301 is mounted on the base frame 303. The positioning structure 302 is fitted into the slots on the four sides of the base frame 303. The four sides of the spot-welded ground shielding layer are respectively positioned in the slots on the four sides of the base frame 303, so as to lay the ground shielding layer flat and position it on the base frame 303.

[0070] S5. Pass the grounding electrode through the ground shielding layer composed of multiple steel mesh 4 and fully weld it to the ground shielding layer to ensure the overall shielding performance and reliable electrical connection.

[0071] S6. Clean up the construction site. No metal debris is allowed on the construction site.

[0072] Specifically, the positioning structure 302 includes an insert block 3021, a telescopic rod 3023, a spring piece 3024, a connecting strip 3025, and a positioning block 3026;

[0073] The top of the insert 3021 is fixed to the bottom of the adapter frame 301, and a groove 3022 is provided on the inner side of the insert 3021.

[0074] The positioning block 3026 is slidably disposed within the groove 3022;

[0075] Connecting strip 3025 is fixed to the vertical plane side of positioning block 3026;

[0076] Spring 3024 is fixed in groove 3022;

[0077] At least one telescopic rod 3023 is disposed between the inner wall of the groove 3022 and the side wall of the connecting strip 3025, and the extended end of the telescopic rod 3023 passes through the spring piece 3024 and connects to the side wall of the connecting strip 3025; when the positioning structure 302 is inserted into the slots on the four sides of the bottom frame 303, the bottom end of the insert block 3021 first enters the insertion slot 3031, and as the insert block 3021 moves down, the positioning block 3026 is squeezed, and the positioning block 3026 moves into the groove 3022. At this time, the spring piece 3024 is squeezed, and the telescopic rod 3023... 23 retracts until the positioning block 3026 moves down to the corresponding position of the positioning groove 3032. The positioning block 3026 loses its compression. Under the action of the spring piece 3024, the positioning block 3026 pops out, and the telescopic rod 3023 extends until the positioning block 3026 is fully inserted into the positioning groove 3032. At this time, the insertion block 3021 is fully inserted into the insertion groove 3031. The transition frame 301 and the bottom frame 303 form a complete transition ground frame, which positions the ground shielding layer composed of multiple steel mesh 4, avoiding multiple welding positioning.

[0078] The spring 3024 adopts an arc-shaped structure design, with the arc-shaped end of the spring 3024 facing the positioning block 3026. The elastic force of the arc-shaped spring 3024 is concentrated at the arc-shaped end of the spring 3024, which faces the middle of the vertical plane end of the positioning block 3026, thus providing a more stable elastic force.

[0079] Furthermore, the slots on the four sides of the bottom frame 303 are divided into insertion slots 3031 and positioning slots 3032;

[0080] The positioning groove 3032 is located on the inner side of the four sides of the bottom frame 303, and the insertion groove 3031 is located on the outer side of the four sides of the bottom frame 303. The insertion groove 3031 is connected to the positioning groove 3032. The insertion block 3021 is inserted into the insertion groove 3031, and the positioning block 3026 is inserted into the positioning groove 3032. The positioning block 3026 is fully inserted into the positioning groove 3032, and the insertion block 3021 is fully inserted into the insertion groove 3031. The transition frame 301 and the bottom frame 303 form a complete transition ground frame, which positions the ground shielding layer composed of multiple steel mesh 4, avoiding multiple welding positioning.

[0081] Furthermore, the insertion end of the positioning block 3026 adopts an obtuse angle structure design, which is adapted to the positioning groove 3032. After the obtuse angle structure of the positioning block 3026 is inserted into the positioning groove 3032, the two inclined sides of the obtuse angle structure contact the inclined sides of the inner sidewall of the positioning groove 3032 respectively, and the force is dispersed, resulting in a better positioning effect of the positioning block 3026.

[0082] Furthermore, the foundation 1 is excavated and the trench is filled with backfill concrete 2, and a grounding steel plate and a galvanized plate are installed on the surface of the backfill concrete 2.

[0083] Working Principle: Based on the dimensions of the ground trench at the site of the multi-condition simulation test platform for power transmission and transformation equipment, a base frame 303 is constructed by welding two long and two short horizontal steel plates in pairs. The base frame 303 is installed inside the trench, with its bottom end contacting the bottom wall of the trench and its four sides contacting the inner sidewalls of the trench. Multiple steel mesh 4 are laid on the base frame 303, with the steel mesh 4 overlapping each other with an overlap width of not less than 100mm. The overlaps of the steel mesh 4 are spot-welded using CO2 shielded welding with a spot weld spacing of less than 50mm, forming a ground shielding layer. The four sides of the spot-welded ground shielding layer are embedded into the grooves on the four sides of the base frame 303, and the steel mesh 4 are laid flat. The top of the positioning structure 302 is welded to the bottom of the transition frame 301. The transition frame 301 is then erected on the base frame 303, and the insertion block 302... 1. The bottom end first enters the insertion slot 3031. As the insertion block 3021 moves down, the positioning block 3026 is squeezed and moves into the groove 3022. At this time, the spring piece 3024 is squeezed and the telescopic rod 3023 retracts until the positioning block 3026 moves down to the corresponding position in the positioning groove 3032. The positioning block 3026 is no longer squeezed. Under the action of the spring piece 3024, the positioning block 3026 pops out and the telescopic rod 3023 extends until the positioning block 3026 is fully inserted into the positioning groove 3032. At this time, the insertion block 3021 is fully inserted into the insertion slot 3031. The transition frame 301 and the bottom frame 303 form a complete transition ground frame, positioning the ground shielding layer composed of multiple steel mesh 4; the grounding electrode passes through the ground shielding layer composed of multiple steel mesh 4 and is fully welded to the ground shielding layer; the construction site is cleaned.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction process for a ground shielding layer of a multi-condition simulation test platform for power transmission and transformation equipment, wherein the construction process is based on a ground shielding layer construction device, the ground shielding layer construction device comprising a foundation (1) and a steel mesh (4), wherein a trench is excavated in the foundation (1), and the steel mesh (4) is installed in the trench of the foundation (1), characterized in that: It also includes a ground frame component (3), which is disposed in the groove of the foundation (1); The ground frame assembly (3) includes a transition frame (301), a positioning structure (302), and a bottom frame (303); The bottom frame (303) is located on the bottom wall of the groove in the foundation (1), and a steel mesh (4) is laid on the bottom frame (303); The adapter frame (301) is located on the inner side wall of the groove in the foundation (1); The positioning structure (302) is located at the connection between the adapter frame (301) and the bottom frame (303); The steel mesh (4) is embedded in the grooves on the four sides of the bottom frame (303), and the positioning structure (302) is used to position the steel mesh (4). The construction process for the ground shielding layer is as follows: Preparation process: S1. Construction surveying and marking: Before the formal construction, the surveyors will measure the ground at the site of the multi-condition simulation test platform for power transmission and transformation equipment according to the grounding system plan. After the measurement is completed, the excavation position of the grounding trench will be marked with lime to cooperate with the excavator to excavate the trench. S2. Trench Excavation: Before trench excavation, the construction personnel confirm that the site elevation is -0.8m. If the site elevation meets the requirements, then according to the position of the lime, excavate 20 cm down, and the trench width is 30 cm, with a trench width error of ±1 cm. S3. Flat steel laying and exothermic welding: After the trench is excavated on site, the construction personnel lay flat steel and steel pipes according to the trench direction. Professional technicians weld each welding part. For the welded joint, there should be no detachment, no false weld, and no porosity. Ground shielding layer construction process: S1. Install a bottom frame (303) in the trench on the ground. The bottom end of the bottom frame (303) contacts the bottom wall of the trench, and the four sides of the bottom frame (303) contact the inner side wall of the trench. S2. Lay multiple steel mesh (4) on the bottom frame (303). The steel mesh (4) overlaps with each other, with an overlap width of not less than 100mm. The overlap of the steel mesh (4) is connected by carbon dioxide shielded spot welding, with a spot welding spacing of less than 50mm, forming a ground shielding layer. The four sides of the spot-welded ground shielding layer are embedded in the grooves on the four sides of the bottom frame (303). S3. Weld the top of the positioning structure (302) to the bottom of the adapter frame (301); S4. The adapter frame (301) is mounted on the base frame (303). The positioning structure (302) is fitted into the grooves on the four sides of the base frame (303). The four sides of the spot-welded ground shielding layer are respectively positioned in the grooves on the four sides of the base frame (303), so that the ground shielding layer is laid flat and positioned on the base frame (303). S5. Pass the grounding electrode through the ground shielding layer composed of multiple steel mesh (4) and fully weld it to the ground shielding layer. S6. Clean up the construction site. No metal debris is allowed on the construction site.

2. The construction process of the ground shielding layer for the multi-condition simulation test platform for power transmission and transformation equipment according to claim 1, characterized in that: The positioning structure (302) includes an insert (3021), a telescopic rod (3023), a spring piece (3024), a connecting strip (3025), and a positioning block (3026); The top end of the insert (3021) is fixed to the bottom end of the adapter frame (301), and a groove (3022) is provided on the inner side of the insert (3021); The positioning block (3026) is slidably disposed within the groove (3022); The connecting strip (3025) is fixed to the vertical plane side of the positioning block (3026); The spring piece (3024) is fixedly disposed in the groove (3022); At least one of the telescopic rods (3023) is disposed between the inner sidewall of the groove (3022) and the sidewall of the connecting strip (3025), and the extended end of the telescopic rod (3023) passes through the spring piece (3024) and is connected to the sidewall of the connecting strip (3025); The spring piece (3024) adopts an arc-shaped structure design, with the starting end of the arc facing the positioning block (3026).

3. The construction process of the ground shielding layer for the multi-condition simulation test platform for power transmission and transformation equipment according to claim 2, characterized in that: The grooves on the four sides of the bottom frame (303) are divided into insertion grooves (3031) and positioning grooves (3032); The positioning groove (3032) is located on the inner side of the four sides of the bottom frame (303), the insertion groove (3031) is located on the outer side of the four sides of the bottom frame (303), and the insertion groove (3031) is connected to the positioning groove (3032); the insertion block (3021) is inserted into the insertion groove (3031), and the positioning block (3026) is inserted into the positioning groove (3032).

4. The construction process of the ground shielding layer for the multi-condition simulation test platform for power transmission and transformation equipment according to claim 3, characterized in that: The positioning block (3026) has an obtuse angle structure at the insertion end, and the insertion end of the positioning block (3026) is adapted to the positioning groove (3032).

5. The construction process of the ground shielding layer for the multi-condition simulation test platform for power transmission and transformation equipment according to claim 1, characterized in that: The foundation (1) is excavated and trenched, and then backfilled with concrete (2).

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