A GIL field-installed shaft guidance system and its installation method

Abstract

A GIL (Gas Insulator) field installation shaft guidance system and its installation method belong to the field of high-voltage electrical technology. The system includes two operating platforms fixed to the edge of the shaft, with a crossbeam between the two platforms. Support rods are hinged to the outer sides of each platform, with the other end of the support rods overlapping the crossbeam. A vertical guide rail is fixed to the inner wall of the shaft, and a guide plate is slidably connected to the guide rail. The guide plate is connected to the bottom flange of the shaft busbar. During installation, the bottom flange of the first busbar section is fixed to the guide plate, the guide plate is inserted into the guide rail, and the support rod is closed so that the top flange of the busbar is engaged with the support rod. The second busbar section is lowered and connected to its bottom flange. The support rod is opened and lowered further, then closed again to support the top flange of the second busbar section. This operation is repeated to complete the installation of subsequent sections. This invention effectively suppresses busbar sway, avoids the risk of suspension during hoisting, and significantly improves the installation accuracy, operational safety, and construction efficiency of the GIL busbar in the shaft.

Description

Technical Field

[0001] This invention relates to the field of high-voltage electrical products in the power industry, and more specifically to a guiding and temporary support system for on-site installation of gas-insulated metal-enclosed transmission lines (GIL) in shafts. Background Technology

[0002] Gas-insulated metal-enclosed transmission lines (GILs) are widely used in critical applications such as large power plants, ultra-high voltage substations, and urban underground power transmission due to their advantages such as large transmission capacity, small footprint, high reliability, low maintenance, and low electromagnetic influence. The on-site installation of GILs is a crucial step in power transmission engineering construction, and its quality directly determines the long-term operational reliability of the line.

[0003] Installing GIL busbars within the confined space of a vertical shaft presents multiple challenges, including the weight of the busbar itself, space limitations, and vertical alignment, requiring strict coaxial alignment between multiple busbar sections, stress-free and uniform flange contact, and reliable airtight connections. Currently, the following technical shortcomings exist in GIL shaft installation operations:

[0004] Vertical alignment accuracy is difficult to control: Long sections of busbar cylinders are prone to swaying and twisting during hoisting, making it difficult to achieve precise coaxial alignment with the lower installed cylinders. Manual high-altitude repeated adjustments are often required, which is inefficient and difficult to guarantee accuracy. Lack of temporary support and stabilization measures: There are no reliable intermediate temporary support points in the shaft. The cylinder relies entirely on the hoisting equipment to be suspended before docking, which poses a risk of swaying and brings serious safety hazards to workers at height. The conflict between installation efficiency and safety is prominent: the limited working space and complex alignment requirements lead to long installation time and high risk, making it difficult to coordinate quality, safety and efficiency.

[0005] Therefore, there is an urgent need for a specialized device that can adapt to the characteristics of GIL shaft installation, provide reliable vertical guidance and temporary support, so as to improve installation accuracy, ensure operational safety and increase construction efficiency. Summary of the Invention

[0006] In view of this, the present invention provides a GIL field-installed shaft guidance system and its installation method, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A GIL field-installed shaft guidance system for operation on the edge platform of a shaft; comprising: The system includes two operating platforms, both of which are fixed to the edge platform, allowing them to extend radially into the shaft sidewall. A crossbeam is fixed between the two operating platforms, located on the side of each platform closest to the edge platform. Support rods are hinged to the sides of each platform away from the edge platform, with the other ends of the support rods resting on the crossbeam. The support rods can be rotated to adjust the distance between them, thereby enabling the support and release of the top flange of the shaft busbar. A vertical guide rail is fixed to the inner wall of the shaft, and a guide plate is slidably connected to the vertical guide rail. The guide plate is connected to the bottom flange of the shaft busbar, thereby realizing the guidance of the shaft busbar during lowering and conveying.

[0008] Through the above technical solution, this invention achieves precise guidance of the bottom flange of the GIL shaft busbar and reliable temporary support of the top flange by using two operating platforms fixed to the edge of the shaft and their hinged support rods, in conjunction with guide rails and guide plates on the vertical inner wall. This effectively suppresses the swaying and twisting of the busbar during vertical lowering, improves coaxial alignment accuracy, and provides an intermediate bearing point for the busbar to avoid the swaying risk and safety hazards caused by relying entirely on hoisting and hovering. At the same time, the rapid opening and closing adjustment of the support rods enables continuous operation of segmented installation, significantly improving the installation efficiency, construction safety, and installation quality of the GIL busbar in the shaft.

[0009] Preferably, in the above-mentioned GIL field installation shaft guidance system, the first end of the support rod is hinged to the top of the operating platform via a rotating shaft, and the second end of the support rod rests on the crossbeam.

[0010] Preferably, in the above-mentioned GIL field installation shaft guide system, the second end of the support rod is provided with a through hole, and the crossbeam is provided with a positioning pin hole. The positioning pin passes through the through hole and is inserted into the positioning pin hole, so that the two support rods are close to each other, which can satisfy the support of the top flange of the shaft busbar.

[0011] Preferably, in the above-mentioned GIL field installation shaft guide system, a nylon pad is fixed on the upper surface of the support rod.

[0012] Preferably, in the above-mentioned GIL field installation shaft guiding system, the vertical guide rail is an I-beam, and the guide plate is provided with a groove that slides in connection with the flange of the I-beam.

[0013] Preferably, in the above-mentioned GIL field installation shaft guidance system, the guide plate is composed of two symmetrical plates, which are joined from both sides of the I-beam and slidably connected to the I-beam.

[0014] Preferably, in the above-mentioned GIL field installation shaft guidance system, the guide plate is fastened to the flange hole on the bottom flange of the shaft busbar by bolts.

[0015] Preferably, in the above-mentioned GIL field installation shaft guidance system, the operating platform has an opening on the side facing the edge platform.

[0016] This invention also provides a method for installing a shaft busbar using a GIL field-installed shaft guidance system, comprising the following steps: Step 1: Fix the bottom flange of the first section of the vertical shaft busbar to the guide plate, and put the two support rods in the open state; Step 2: Insert the guide plate into the vertical guide rail, then bring the two support rods close to each other, and lower the first section of the vertical shaft busbar until its top flange is engaged with the two support rods; Step 3: Lower the second section of the vertical shaft busbar, so that the bottom flange of the second section of the vertical shaft busbar is connected to the top flange of the first section of the vertical shaft busbar and the connection is tightened. Step 4: After the connection is completed, open the two support rods and continue to lower the connected first and second shaft busbars. Then, bring the two support rods closer together again until the top flange of the second shaft busbar is engaged with the two support rods to connect the third shaft busbar.

[0017] Through the above technical solution, this invention achieves vertical guidance of the bottom flange by sliding cooperation between the guide plate and the vertical guide rail, and uses the opening and closing of two support rods to alternately support the top flanges of each busbar segment, forming a cyclical operation process of "lowering-supporting-connecting-lowering again". This avoids the swaying and shaking of the busbar during long-distance lowering, ensuring that the flanges of adjacent busbar segments can be accurately aligned and reliably fastened. At the same time, the weight of each busbar segment is temporarily borne by the support rods, freeing the hoisting equipment from continuous suspension and significantly reducing the safety risks of high-altitude operations. In addition, the method has clear operation steps and compact connections, and can continuously complete the installation of multiple busbar segments, significantly improving the construction efficiency and installation quality of GIL busbars in the shaft.

[0018] Preferably, in the above method, steps three to four are repeated to complete the installation of each subsequent section of the vertical shaft busbar in sequence.

[0019] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a GIL field-installed shaft guidance system and its installation method, which has the following beneficial effects: 1. Precise guidance to ensure centering accuracy: Through the sliding cooperation between the vertical guide rail and the guide plate, the lateral sway and torsion of the busbar during the vertical lowering process are effectively suppressed, ensuring the coaxial centering accuracy between multiple busbar sections and improving the installation quality.

[0020] 2. Reliable support and improved operational safety: The operating platform, crossbeams, and openable support rods provide stable temporary support points for the top flange of the busbar, eliminating the need for the hoisting equipment to be suspended for extended periods to bear weight, avoiding the risk of swaying, and significantly reducing safety hazards in high-altitude operations.

[0021] 3. Convenient operation and improved installation efficiency: The support rod can be quickly opened and closed and fixed through the rotating shaft and positioning pin. With the segmented lowering-connection-lowering method, multiple busbar sections can be installed continuously, reducing manual adjustment time and greatly improving construction efficiency.

[0022] 4. Stable structure and strong adaptability: The dual operating platforms and crossbeams form a stable support frame. The modular design can be adapted to different sizes of shaft edge platforms. The guide plates adopt a symmetrical mating structure, which makes installation and disassembly convenient and the overall system has high reliability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 The attached figure is a structural schematic diagram of the GIL field installation shaft guidance system provided by the present invention in use. Figure 2 The attached figure is a schematic diagram of the operating platform provided by the present invention; Figure 3 The attached figure is a schematic diagram of the structure of the vertical guide rail and guide plate provided by the present invention. Figure 4 The attached figure is a schematic diagram of the structure of the vertical shaft busbar provided by the present invention; Figure 5 The attached figure is a structural schematic diagram of the first and second steps of the method provided by the present invention; Figure 6 The attached figure is a structural schematic diagram of the third step of the method provided by the present invention.

[0025] in: 1-Edge countertop; 2-Operating platform; 21-Crossbeam; 22-Support rod; 23-Rotating shaft; 24-Positioning pin; 25-Nylon pad; 3-Vertical guide rail; 31-Guide plate; 311-Slide groove; 4-Shaft busbar; 41-Top flange; 42-Bottom flange. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] See appendix Figure 1 To be continued Figure 4 This invention discloses a GIL field-installed shaft guidance system and its installation method: As attached Figure 1 As shown, the GIL field installation shaft guidance system provided in this embodiment of the invention is used for operation on the edge platform 1 of the shaft. The system includes two operating platforms 2 and vertical guide rails 3.

[0028] Both operating platforms 2 are fixed to the edge platform 1, allowing them to extend radially into the shaft from the side wall. A crossbeam 21 is fixed between the two operating platforms 2, located on the side of each platform 2 closest to the edge platform 1. Support rods 22 are hinged to the sides of each operating platform 2 away from the edge platform 1, with the other ends of the two support rods 22 resting on the crossbeam 21. The two support rods 22 can be rotated to adjust the distance between them, thereby supporting and releasing the top flange 41 of the shaft busbar 4.

[0029] As attached Figure 2 As shown, the first end of the support rod 22 is hinged to the top of the operating platform 2 via a rotating shaft 23, and the second end of the support rod 22 overlaps the crossbeam 21. A through hole is provided at the second end of the support rod 22, and a positioning pin hole is provided on the crossbeam 21. A positioning pin 24 passes through the through hole and is inserted into the positioning pin hole, bringing the two support rods 22 close to each other to support the top flange 41 of the vertical shaft busbar 4. To prevent the support rods 22 from scratching or making hard contact with the top flange 41 of the vertical shaft busbar 4, a nylon pad 25 is fixed to the upper surface of the support rods 22. Furthermore, the operating platform 2 has an opening on the side facing the edge of the platform 1 for easy access and operation by personnel.

[0030] As attached Figure 3As shown, the vertical guide rail 3 is fixed to the inner wall of the shaft, and a guide plate 31 is slidably connected to the vertical guide rail 3. In this embodiment, the vertical guide rail 3 is made of I-beam, and the guide plate 31 has a groove 311 that is slidably connected to the flange plate of the I-beam. The guide plate 31 is composed of two symmetrical plates, which are joined from both sides of the I-beam and slidably connected to the I-beam. The guide plate 31 is fastened to the flange hole on the bottom flange 42 of the shaft busbar 4 by bolts, thereby realizing the guidance of the shaft busbar 4 during lowering and conveying.

[0031] As attached Figure 4 As shown, the two ends of the vertical shaft busbar 4 have a top flange 41 and a bottom flange 42, respectively, and multiple sections of the vertical shaft busbar 4 are connected sequentially by flange docking and fastening.

[0032] The following is in conjunction with the appendix Figure 5 and attached Figure 6 The installation method of the GIL field installation shaft guidance system provided in the embodiments of the present invention will be described in detail: Step 1: Connect the bottom flange 42 of the first section of the vertical shaft busbar 4 to the guide plate 31 with bolts, and put the two support rods 22 in the open position.

[0033] Step 2: Insert the guide plate 31 into the vertical guide rail 3, allowing the slide groove 311 to slide against the I-beam flange. Then, bring the two support rods 22 closer together and fix the second end of the support rods 22 to the crossbeam 21 using the locating pins 24. Slowly lower the first section of the vertical shaft busbar 4 until its top flange 41 engages with the nylon pads 25 of the two support rods 22, as shown in the attached diagram. Figure 5 As shown.

[0034] Step 3: Lower the second section of the vertical shaft busbar 4, so that the bottom flange 42 of the second section of the vertical shaft busbar 4 aligns with the top flange 41 of the first section of the vertical shaft busbar 4, as shown in the attached diagram. Figure 6 As shown, it is connected by bolts.

[0035] Step 4: After connection, pull out the positioning pin 24 and open the two support rods 22. Continue to lower the connected first and second shaft busbar sections 4. Then, bring the two support rods 22 closer together again and fix them with the positioning pin 24 until the top flange 41 of the second shaft busbar section 4 is engaged with the nylon pads 25 of the two support rods 22, so as to connect the third shaft busbar section 4.

[0036] Repeat steps three and four above to complete the installation of each subsequent section of the vertical shaft busbar 4 until the entire vertical shaft transmission line is installed.

[0037] It should be noted that the length of the vertical shaft busbar 4 in this embodiment is commonly 12 meters, 18 meters and 4 meters. The length shown in the attached figure is shorter, mainly to highlight the structural connection relationship.

[0038] The GIL (Gas Infrared) on-site installation shaft guidance system and its installation method provided in this invention, through the coordinated operation of the operating platform 2, support rod 22, vertical guide rail 3, and guide plate 31, achieves precise guidance and segmented temporary support for the shaft busbar 4 during vertical lowering. This effectively solves problems such as easy swaying of the busbar cylinder, low alignment accuracy, and safety hazards due to reliance on hoisting equipment for suspension, which are inherent in traditional installation methods. The system is compact in structure and easy to operate, significantly improving the installation efficiency, safety, and quality of the GIL busbar within the shaft.

[0039] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A GIL field installation shaft guidance system for operation on the edge platform (1) of a shaft; characterized in that, include: The number of operating platforms (2) is two, and both operating platforms (2) are fixed to the edge platform (1), so that the operating platforms (2) extend radially into the shaft sidewall. A crossbeam (21) is fixed between the two operating platforms (2). The crossbeam (21) is located on the side of the two operating platforms (2) close to the edge platform (1). Support rods (22) are respectively hinged on the side of the two operating platforms (2) away from the edge platform (1). The other end of the two support rods (22) is attached to the crossbeam (21). The two support rods (22) can rotate to adjust the distance between them, thereby realizing the support and release of the top flange (41) of the shaft busbar (4). A vertical guide rail (3) is fixed on the inner wall of the shaft, and a guide plate (31) is slidably connected to the vertical guide rail (3). The guide plate (31) is connected to the bottom flange (42) of the shaft busbar (4), thereby realizing the guidance of the shaft busbar (4) during lowering and conveying.

2. The GIL field installation shaft guidance system according to claim 1, characterized in that, The first end of the support rod (22) is hinged to the top of the operating platform (2) via a rotating shaft (23), and the second end of the support rod (22) rests on the crossbeam (21).

3. A GIL field-installed shaft guidance system according to claim 2, characterized in that, The second end of the support rod (22) is provided with a through hole, and the crossbeam (21) is provided with a positioning pin hole. The positioning pin (24) passes through the through hole and is inserted into the positioning pin hole, so that the two support rods (22) are close to each other, which can satisfy the support of the top flange (41) of the vertical shaft busbar (4).

4. A GIL field-installed shaft guidance system according to claim 1, characterized in that, A nylon pad (25) is fixed to the upper surface of the support rod (22).

5. A GIL field-installed shaft guidance system according to claim 1, characterized in that, The vertical guide rail (3) is an I-beam, and the guide plate (31) is provided with a groove that is slidably connected to the flange of the I-beam.

6. A GIL field-installed shaft guidance system according to claim 5, characterized in that, The guide plate (31) is composed of two symmetrical plates, which are joined from both sides of the I-beam and slidably connected to the I-beam.

7. A GIL field-installed shaft guidance system according to claim 5 or 6, characterized in that, The guide plate (31) is fastened to the flange hole on the bottom flange (42) of the vertical shaft busbar (4) by bolts.

8. A GIL field-installed shaft guidance system according to claim 1, characterized in that, The operating platform (2) has an opening on the side facing the edge platform (1).

9. A method for installing a shaft busbar using the GIL field installation shaft guidance system according to any one of claims 1 to 8, characterized in that, Includes the following steps: Step 1: Fix the bottom flange (42) of the first section of the vertical shaft busbar (4) to the guide plate (31) and put the two support rods (22) in the open state; Step 2: Insert the guide plate (31) into the vertical guide rail (3), then bring the two support rods (22) close to each other and lower the first section of the vertical shaft busbar (4) until its top flange (41) is snapped onto the two support rods (22); Step 3: Lower the second section of the vertical shaft busbar (4) so ​​that the bottom flange (42) of the second section of the vertical shaft busbar (4) is connected to the top flange (41) of the first section of the vertical shaft busbar (4) and tightened. Step 4: After the connection is completed, open the two support rods (22), continue to lower the connected first section of the vertical shaft busbar (4) and the second section of the vertical shaft busbar (4), and then bring the two support rods (22) closer to each other again until the top flange (41) of the second section of the vertical shaft busbar (4) is snapped onto the two support rods (22) so as to connect the third section of the vertical shaft busbar (4).

10. The method according to claim 9, characterized in that, Repeat steps three to four to complete the installation of each subsequent section of the vertical shaft busbar (4).

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