Device for replacing tensioning ring

Abstract

The utility model relates to the field of disassembly, in particular to a device for replacing a tensioning ring. Comprising a pull rod, a disc bullet side positioning block, an aluminum strip, an end plate and a backing ring, the two ends of the pull rod are respectively connected with a group of aluminum strips, one group of aluminum strips are connected through a disc spring side positioning block, the other group of aluminum strips are connected through an end plate, and the end plate is further provided with a backing ring used for being connected with a hydraulic device. According to the utility model, through the combination of the pull rod, the aluminum strip, the end plate, the backing ring and the disc spring side positioning block, the rapid positioning and replacement of the tensioning ring in the thyristor assembly or the similar electrical assembly are realized, the aluminum strip is connected with the pull rod bolt, the assembly process is simplified, and an operator can complete the replacement of the tensioning ring without completely disassembling the assembly.

Description

Technical Field

[0001] This utility model relates to the field of disassembly, specifically to a device for replacing a tension ring. Background Technology

[0002] With the rapid development of the modern power industry, high-voltage direct current (HVDC) transmission technology has become an important means of long-distance, large-capacity power transmission, playing an irreplaceable role in improving grid flexibility, enhancing grid interconnection capabilities, and promoting the efficient utilization of renewable energy.

[0003] As the "heart" of DC power transmission projects, the converter valve functions to convert between alternating current (AC) and direct current (DC), ensuring efficient and stable power transmission. Structurally, the converter valve is composed of numerous thyristor assemblies. These assemblies internally use press-fit technology to tightly connect several high-performance thyristor devices to heat sinks, ensuring good heat dissipation and electrical connection. However, under the long-term influence of high voltage, high current, and complex environmental factors, the thyristor assemblies in the converter valve inevitably experience aging, wear, and even damage. This is especially true for critical components such as the tension rings of the thyristor assemblies, whose integrity directly affects the stability and operational safety of the entire valve tower structure.

[0004] Damage to the tension ring of the thyristor assembly directly threatens the normal operation of the converter valve. Since converter valve towers are typically designed as multi-layered suspended structures, suspended from the high steel beams of the converter valve hall after assembly, this restricts the operating space for maintenance personnel and increases the difficulty of replacement work. In practice, the method for replacing the tension ring mainly involves disassembling the assembly from the valve tower, breaking down the thyristor assembly, and reassembling it using a new insulated tension ring. Improper handling of this process can easily lead to the disintegration of the thyristor assembly structure, causing more extensive equipment damage and potentially resulting in a prolonged shutdown of the DC transmission system.

[0005] Therefore, there is an urgent need to develop a device for replacing the tension ring. Utility Model Content

[0006] The purpose of this invention is to provide a device for replacing tension rings. This device is simple and convenient, easy to install and use on site, safe and low in cost, and easy to maintain later.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model discloses a device for replacing a tension ring, comprising a pull rod, a disc spring side positioning block, an aluminum strip, an end plate, and a washer ring;

[0009] The two ends of the pull rod are connected by a set of aluminum strips. One set of aluminum strips is connected by a disc spring side positioning block, and the other set of aluminum strips is connected by an end plate. The end plate is also provided with a washer ring for connecting the hydraulic device.

[0010] As a further improvement, the disc spring side positioning block coincides with the central axis of the end plate, and the disc spring side positioning block and the end plate are respectively fixedly connected to the aluminum strip.

[0011] As a further improvement, the tie rod is a plurality of rods arranged in parallel to each other.

[0012] As a further improvement, the aluminum strip is provided with a through hole for connecting to the pull rod, and the pull rod and the aluminum strip are locked together by a nut.

[0013] As a further improvement, the pull rod is made of insulating material.

[0014] As a further improvement, the aluminum strip is arranged vertically.

[0015] As a further improvement, the end plate has a protrusion in the middle, a central hole for mounting a washer ring on the protrusion, and grooves at both ends of the protrusion.

[0016] As a further improvement, a hydraulic device is also included, comprising a connected hydraulic head and a hydraulic pump, the hydraulic head being adapted to a groove.

[0017] As a further improvement, a locking wrench for adjusting the tightness is also included.

[0018] Application of a tension ring replacement device for replacing tension rings in thyristor assemblies, IGCT assemblies, and diode assemblies.

[0019] Compared with the prior art, this utility model achieves the following technical effects:

[0020] This invention achieves rapid positioning and replacement of the internal tension ring of a thyristor assembly or similar electrical component through a combination of a pull rod, aluminum strip, end plate, and disc spring side positioning block. The aluminum strip is bolted to the pull rod, simplifying the assembly process, allowing operators to replace the tension ring without completely disassembling the component. Furthermore, the hydraulic device, designed to fit the groove on the end plate, allows for precise force control via a hydraulic pump, preventing component disassembly due to improper operation using traditional mechanical tools, thus improving the convenience and controllability of on-site operation.

[0021] The pull rods of this device are made of insulating material, effectively isolating the electrical components from direct contact with external metal parts and preventing safety hazards caused by leakage or short circuits. Multiple parallel pull rods distribute the internal pressure of the components, evenly transmitting the load applied by the hydraulic device and avoiding component deformation or breakage caused by localized stress concentration. The disc spring-side positioning blocks ensure positioning accuracy and prevent displacement during replacement.

[0022] This device requires only minor adjustments to replace the tension ring, significantly reducing equipment downtime and maintenance costs. The included aluminum strips and tie rods facilitate future maintenance or component replacement, allowing for quick disassembly without specialized tools, further simplifying long-term maintenance. This device is not only suitable for thyristor assemblies but also adaptable to the tension ring replacement needs of high-voltage electrical equipment such as IGCT assemblies and diode assemblies. By adjusting the length of the aluminum strips, the number of tie rods, the length of the tie rods, or the end plate size, it can accommodate assemblies of different specifications, demonstrating strong versatility and expandability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the depressurization process of this utility model;

[0025] Figure 3 This is a schematic diagram of the installation of the device of this utility model;

[0026] Figure 4 This is another installation diagram of the device of this utility model;

[0027] Figure 5 This is a diagram showing how to replace the tension ring.

[0028] Reference numerals: 1. Disc spring side positioning block; 2. Pull rod; 3. Aluminum strip; 4. End plate; 5. Washer ring; 6. Hydraulic device; 7. Locking wrench. Detailed Implementation

[0029] The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Rather, the embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0030] It should be noted that any equipment will experience component failures over time, requiring replacement of the failed components. A ring-shaped structure that maintains pressure for an extended period is called a tension ring. Normally, the tension ring is under stress and cannot be disassembled for replacement when damaged. How to conveniently and efficiently replace tension rings has become a pressing problem. This embodiment uses the tension ring on a thyristor assembly as an example to illustrate the structure of this device. This device can quickly and conveniently replace the insulating tension ring of a thyristor assembly without disassembling the thyristor assembly when the tension ring is damaged and needs replacement.

[0031] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0032] like Figure 1 As shown, this utility model provides a device for replacing a tension ring, including a pull rod 2, a disc spring side positioning block 1, an aluminum strip 3, an end plate 4, and a washer 5; the two ends of the pull rod 2 are respectively connected by a set of aluminum strips 3, one set of aluminum strips 3 is connected to each other through the disc spring side positioning block 1, and the other set of aluminum strips 3 is connected to each other through the end plate 4. The end plate 4 is also provided with a washer 5 for connecting a hydraulic device 6.

[0033] This implementation example Figure 1 As shown, a disc spring side positioning block 1 is provided at the left end, and an end block is provided at the right end. The disc spring side positioning block 1 and the end block are connected by an aluminum strip 3 and a pull rod 2. In this embodiment, each end is provided with a set of aluminum strips 3, and each set of aluminum strips 3 consists of two strips. The two sets of aluminum strips 3 are connected by a pull rod 2. In this embodiment, there are four pull rods 2, but it is not limited to this. The number of pull rods 2 can be increased or decreased according to different usage scenarios and requirements.

[0034] In the embodiment, the connection between the pull rod 2 and the two sets of aluminum strips 3 is fixed by the disc spring side positioning block 1 and the end plate 4, which can form a stable frame. The frame improves the rigidity and stability of the overall structure and can withstand a large external force from the hydraulic device 6 without easily deforming or being damaged.

[0035] In this embodiment, the disc spring-side positioning block 1 is used to insert into the slot of the right yoke of the thyristor assembly, and the end plate 4 is used to fit tightly against the left yoke of the thyristor assembly. The disc spring-side positioning block 1 can accurately position the installation position of the device and the thyristor assembly, ensuring that the device can not only be accurately installed in the thyristor assembly, but also without modifying the structure of the assembly itself, thus avoiding damage to the assembly. In addition, the central axis of the disc spring-side positioning block 1 and the end plate 4 coincide, ensuring the symmetry and balance of the entire structure, which helps to reduce structural twisting or deformation caused by installation deviation or uneven force.

[0036] In this embodiment, the pull rod 2 is made of insulating material. The insulating material is preferably glass fiber reinforced epoxy resin, which has the characteristics of high strength and good elasticity and can withstand the force provided by the hydraulic device. However, it is not limited to this and other insulating materials can also be selected.

[0037] like Figure 1 As shown, in this embodiment, the end plate 4 provides an installation position for the washer ring 5 through the protrusion and groove in the middle. On the other hand, the structure of the protrusion and groove facilitates connection with the hydraulic head, making it easy for the hydraulic head to be connected to the end plate 4.

[0038] The hydraulic device 6 in the embodiment includes a hydraulic head, a hydraulic pump, and a release valve. The hydraulic head can provide pressure, and the hydraulic head and hydraulic pump can apply pressure to the gasket 5 and transmit the pressure to the thyristor assembly. The release valve is used to relieve pressure.

[0039] Figure 1 As shown, the embodiment also provides a locking wrench 7, which is used to adjust the tightness of the locking nut in the thyristor assembly during depressurization and pressurization to maintain the clamping force of the thyristor assembly.

[0040] The components of this device are connected by bolts, which makes it easy to disassemble and assemble each part, thus facilitating the maintenance and upkeep of the device. When a component malfunctions or is damaged, it can be quickly replaced or repaired.

[0041] This device is applicable to other similar components such as thyristor modules, IGCT modules, and diode modules. The structural dimensions and quantity of each component of this device can be flexibly adjusted according to the different specifications of the modules to meet the needs of different application scenarios.

[0042] When using this device, the upper and lower insulating tension rings of the thyristor assembly are replaced to meet the requirements for replacing the insulating tension rings of the small component converter valve.

[0043] like Figure 2 As shown, the hydraulic head of the hydraulic device 6 is inserted into the right yoke slot of the thyristor assembly. The hydraulic device 6 is used to apply a specified pressure to the silicon stack inside the thyristor assembly. The locking nut is loosened by two turns using the locking wrench 7. The release valve on the hydraulic device 6 is opened to reduce the pressure applied to the silicon stack to the specified level. Then, the locking nut is tightened using a special locking nut wrench.

[0044] Insert the disc spring side positioning block 1 into the right yoke end face, then press the end plate 4 tightly into the left yoke groove, and then connect the disc spring side positioning block 1 and the end plate 4 to the aluminum strip 3. The aluminum strip 3 is connected to the pull rod 2, and the nut at the end of the insulating pull rod 2 is tightened. Figure 3 As shown.

[0045] Insert the washer 5 into the center hole on the end plate 4, and insert the hydraulic head of the hydraulic device 6 into the groove on the end plate 4. Use the hydraulic device 6 to apply the specified pressure to the silicon stack, thereby relieving the pressure on the upper and lower insulating tension rings of the thyristor assembly. Figure 4 As shown.

[0046] Remove the aluminum plates from the upper and lower insulating tension ring ends of the thyristor assembly, take out the old tension ring, replace it with a new one, and reinstall the aluminum plates. Then release the pressure of hydraulic device 6 and remove the tooling, such as... Figure 5 As shown; reinsert the hydraulic head of hydraulic device 6 into the right yoke slot, apply the specified pressure to the silicon stack using hydraulic device 6, tighten the lock nut, remove hydraulic device 6, and complete the replacement of the insulating tension ring.

[0047] The device for replacing the tension ring in this embodiment can be used to replace the tension ring in similar structures such as thyristor assemblies, IGCT assemblies, and diode assemblies, so this device has strong applicability.

[0048] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0049] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A device for replacing a tension ring, characterized in that, Includes pull rod, disc spring side positioning block, aluminum strip, end plate and washer ring; The two ends of the pull rod are connected by a set of aluminum strips. One set of aluminum strips is connected by a disc spring side positioning block, and the other set of aluminum strips is connected by an end plate. The end plate is also provided with a washer ring for connecting the hydraulic device.

2. The device for replacing a tension ring according to claim 1, characterized in that, The disc spring side positioning block coincides with the central axis of the end plate, and the disc spring side positioning block and the end plate are respectively fixedly connected to the aluminum strip.

3. The device for replacing a tension ring according to claim 1, characterized in that, The tie rod consists of several rods arranged in parallel to each other.

4. The device for replacing a tension ring according to claim 1, characterized in that, The aluminum strip has a through hole for connecting to the pull rod, and the pull rod and the aluminum strip are locked together by a nut.

5. The device for replacing a tension ring according to claim 4, characterized in that, The pull rod is made of insulating material.

6. The device for replacing a tension ring according to claim 1, characterized in that, The aluminum strip is arranged vertically.

7. The device for replacing a tension ring according to claim 1, characterized in that, The end plate has a protrusion in the middle, a central hole for installing a washer ring on the protrusion, and grooves at both ends of the protrusion.

8. The device for replacing a tension ring according to claim 7, characterized in that, It also includes a hydraulic device, which includes a connected hydraulic head and a hydraulic pump, the hydraulic head being adapted to the groove.

9. The device for replacing a tension ring according to claim 1, characterized in that, It also includes a locking wrench for adjusting the tightness.

10. A device for replacing a tension ring according to any one of claims 1 to 9, characterized in that, Used for replacing tension rings in thyristor assemblies, IGCT assemblies, and diode assemblies.

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