Sliding contact electrode integrated complete device for GIL three-post insulator and GIL assembly thereof

Abstract

The invention relates to the technical field of power transmission and distribution equipment manufacturing, in particular to a GIL three-post insulator sliding contact pole integrated complete device and a GIL assembly thereof, which comprise a metal closed shell, a three-post insulator, a particle capturing device and an integrated complete device, the sliding contact electrode integrated complete device is composed of a sliding contact electrode, a contact electrode spring, a nylon lining and a fixed base and is fixed through a limiting bolt and a fastening nut to form a pre-press-fit state, after the device is installed, the sliding contact electrode keeps stable contact with the metal closed shell under the action of the spring, the conductivity is ensured, the nylon lining is provided with a particle collecting groove, and the particle collecting groove is used for collecting particles. The metal particles are effectively captured and prevented from permeating to the surface of epoxy resin by combining the particle collection sinking table of the three-post insulator end insert, the surface discharge risk is reduced, the device recovers to a pre-compressed state under the resilience force effect of the spring during disassembly, assembly scattering or bouncing is avoided, and safe and convenient operation is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing of power transmission and distribution equipment, and particularly to an integrated complete set of sliding contact poles for a GIL three-pillar insulator and its GIL components. Background Art

[0002] As a high-voltage power transmission equipment, a Gas Insulated Transmission Line (GIL) has the advantages of high reliability, large transmission capacity, and uniform electric field, and is widely used in power transmission projects. The grounding conduction component of a GIL device is a core component thereof, responsible for maintaining the electrical grounding conduction of the device and ensuring the stability and safety of the device operation. However, the existing grounding conduction components have the following technical defects and risks during the assembly and disassembly processes:

[0003] (1) Problem of part dispersion before assembly: Each part of the existing grounding conduction component is usually in a scattered state, and multiple parts need to be temporarily assembled onto the end inserts of the three-pillar insulator during assembly. This assembly method places high requirements on the preparation of part batching, the number and proficiency of assembly personnel. Especially in a complex on-site environment, problems such as part scattering or loss and low assembly efficiency are likely to occur;

[0004] (2) Safety hazards during assembly: In the existing technology, when assembling the sliding contact pole component, an auxiliary tool (such as a nylon arc plate) needs to be used for vertical pressing to place the sliding contact pole and the nylon bushing within the spring compression stroke, ensuring that the component can be pushed into the metal enclosed housing together with the central conductor. However, this assembly method has the following deficiencies, including: risk of tool offset, part scattering and loss, and personnel safety risk;

[0005] (3) Risks during disassembly: During the disassembly process of the existing grounding conduction component, after losing the restraint of the inner wall of the metal enclosed housing, the spring will instantly return from the compressed state to the free state, and the sliding contact pole and the nylon bushing are prone to the following problems due to the action of the resilience force: such as part bouncing and scattering, injury to operating personnel, and metal foreign matter contamination.

[0006] Based on the above problems, the existing grounding conduction components have poor stability and safety during the pre-assembly, in-assembly, and disassembly processes, and problems such as component scattering, personnel injury, low assembly efficiency, and operation hazards exist. Therefore, there is an urgent need for an integrally designed grounding conduction component that can effectively solve the problems of part scattering, bouncing risk, and assembly complexity, simplify the operation steps, improve the assembly and disassembly efficiency, and ensure the reliability and safety of the device operation. Summary of the Invention

[0007] The purpose of the present invention is to provide an integrated complete set of sliding contact poles for a GIL three-pillar insulator and its GIL components to solve the problems raised in the above background art.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: A sliding contact integrated complete set for a GIL three-pillar insulator and its GIL assembly, including a metal enclosed housing, three-pillar insulators, a particle capture device, and a sliding contact integrated complete set. The sliding contact integrated complete set includes a sliding contact, a contact spring, a nylon bushing, and a fixed base. The nylon bushing is provided with a sliding contact limit hole and a guiding hole for accommodating the sub-assembly composed of the sliding contact and the contact spring.

[0009] According to the above technical solution, a bushing spring limit hole is provided in the middle of the nylon bushing, and a bushing spring is installed inside and fixed by passing a limit bolt through.

[0010] According to the above technical solution, a positioning groove is provided on the fixed base, which corresponds to the contact spring and the bushing spring, so that a pre-pressed state is formed between the fixed base and the bottom surface of the nylon bushing.

[0011] According to the above technical solution, the limit bolt is fixed by threadedly mating with a preset threaded hole on the fixed base, and a fastening nut is provided at the end of the limit bolt to prevent the limit bolt from loosening.

[0012] According to the above technical solution, the initial height between the bottom edge of the nylon bushing and the fixed base before assembly is T0, and in the pre-pressed state, the distance between the bottom edge of the nylon bushing and the fixed base is T1, satisfying 0 ≤ T1 < T0.

[0013] According to the above technical solution, the assembly method of the GIL unit includes the following steps:

[0014] S11: First install the particle capture device on the three-pillar insulator and adjust the position of its grid holes to align with the bottom area of the sliding contact integrated complete set;

[0015] S12: Install the nylon roller assemblies for the lower three-pillar insulators respectively;

[0016] S13: Use an L-shaped hex key to tighten the upper fixing bolts of the particle capture device;

[0017] S14: Install the sliding contact integrated complete set on the grounding insert at the end of the three-pillar insulator.

[0018] According to the above technical solution, by applying a manual pressing force to the top of the nylon bushing, that is, the force application area, the sliding contact integrated complete set enters the pre-compressed assembly state. At this time:

[0019] The distance between the bottom edge of the nylon bushing and the fixed base is T1;

[0020] The sliding contact pole moves downward under the reaction force of the contact pole spring, and meanwhile, it maintains a protruding distance of S0 on the nylon bushing;

[0021] The distance from the top end of the nylon bushing to the inner wall of the metal enclosure is H1, and H1 > S0 is satisfied to prevent interference when the sliding contact pole enters the metal enclosure.

[0022] According to the above technical solution, during the process of slowly pushing the conductor and the three - pillar insulator into the interior of the metal enclosure, the gap δ between the outer circle of the particle capture device and the inner wall of the metal enclosure is adjusted so that 0 < δ ≤ 10 mm.

[0023] According to the above technical solution, when the sliding contact pole integrated complete set of devices approaches the flange opening, the pressing force on the force - applying area at the top of the nylon bushing is released, so that the device enters the compression limit assembly operation state. In this state:

[0024] The sliding contact pole moves upward under the combined resilience of the contact pole spring and the bushing spring until it is in close contact with the inner wall of the metal enclosure;

[0025] Meanwhile, the following distance relationships are maintained: the descending distance of the sliding contact pole is S1 (0 ≤ S1 ≤ S0 is satisfied), the distance from the nylon bushing to the inner wall of the metal enclosure is H2 (0 ≤ H2 ≤ H1 is satisfied), and the distance from the bottom edge of the nylon bushing to the fixed base is T2 (T1 ≤ T2 < T0 is satisfied).

[0026] According to the above technical solution, during the disassembly process of the GIL unit, when the conductor and the three - pillar insulator are slowly removed from the metal enclosure, during the process of the sliding contact pole integrated complete set of devices detaching from the inner wall of the metal enclosure, due to the resilience of the contact pole spring and the bushing spring and the restraint of the limit bolt, the device only rebounds to the pre - compressed state, thereby preventing the sliding contact pole or the nylon bushing from bouncing or flying out due to excessive spring resilience, ensuring the stability of the overall structure of the device and facilitating safe disassembly.

[0027] Compared with the prior art, the present invention includes a metal enclosure, a three - pillar insulator, a particle capture device, and a sliding contact pole integrated complete set of devices. The sliding contact pole integrated complete set of devices is composed of a sliding contact pole, a contact pole spring, a nylon bushing, a bushing spring, and a fixed base. Through a unique sliding contact pole groove and boss design and pre - compression structure, it maintains efficient sliding contact with the inner wall of the metal enclosure to ensure continuous grounding conduction. The particle capture device is provided with grid holes and particle collection sinks to effectively capture metal particles generated by the friction between the sliding contact pole and the inner wall of the shell during operation, avoiding the risk of surface discharge caused by particle accumulation. The present invention realizes the stable assembly, convenient disassembly, and long - term reliable operation of the device through multiple designs of pre - compression, manual pressing, and limit bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0029] In the accompanying drawings:

[0030] Figure 1 is a schematic cross-sectional view of the integrated sliding contact pole device proposed by the present invention;

[0031] Figure 2 is a schematic front view structure diagram of the integrated sliding contact pole device proposed by the present invention;

[0032] Figure 3 is a schematic assembly diagram of the integrated sliding contact pole complete set for a GIL three-pillar insulator and its GIL components;

[0033] Figure 4 is a schematic diagram of the state during the manual pressing and compression assembly of the integrated sliding contact pole device;

[0034] Figure 5 is a schematic structure diagram of the particle capture device in the present invention;

[0035] Figure 6 is an operating state diagram of the integrated sliding contact pole complete set during compression and limit assembly;

[0036] Figure 7 is a schematic cross-sectional view of the operating state of the integrated sliding contact pole complete set during compression and limit assembly.

[0037] In the figures: 1 metal enclosed housing, 2 three-pillar insulator, 3 particle capture device, 4 sliding contact pole, 5 contact pole spring, 6 nylon bushing, 7 bushing spring, 8 fixed base, 9 limit bolt, 10 fastening nut, 11 particle capture device fixing bolt, 12 integrated sliding contact pole complete set, 13 top force application area, 14 flange opening, 15 grid hole, 21 three-pillar insulator end grounding insert, 22 epoxy resin surface area, 23 particle collection sink, 61 particle collection groove;

[0038] δ is the clearance distance between the outer circle of the particle capture device and the inner wall circle of the metal enclosed housing;

[0039] S0 is the distance from the highest point of the sliding contact pole to the highest point of the nylon bushing in the pre-compressed integrated state of the integrated sliding contact pole complete set (abbreviated as the device);

[0040] S1 is the distance that the sliding contact pole descends with the spring compression in the operating state of the device during compression and limit assembly;

[0041] T0 is the distance from the bottom edge of the nylon bushing to the fixed base in the pre-compressed integrated state of the device;

[0042] T1 is the distance from the bottom edge of the nylon bushing to the fixed base in the state of manual pressing and compressing assembly of the device;

[0043] T2 is the distance from the bottom edge of the nylon bushing to the fixed base when the nylon bushing rebounds and is limited during the operation of the compression limit assembly of the device;

[0044] H1 is the distance from the nylon bushing to the inner wall of the metal enclosure in the state of manual pressing and compressing assembly of the device;

[0045] H2 is the distance from the nylon bushing to the inner wall of the metal enclosure during the operation of the compression limit assembly of the device. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] As Figure 1 shown: A sliding contact electrode integrated complete set of devices for GIL three-pillar insulators and its GIL components, including a metal enclosure 1, three-pillar insulators 2, a particle capture device 3, and a sliding contact electrode integrated complete set of devices 12. The sliding contact electrode integrated complete set of devices 12 includes a sliding contact electrode 4, a contact electrode spring 5, a nylon bushing 6, and a fixed base 8. Each group of sub-components is composed of a sliding contact electrode 4 and a contact electrode spring 5; the nylon bushing 6 is provided with a sliding contact electrode limit hole and a guiding hole for accommodating the above-mentioned sub-components; a bushing spring limit hole is provided in the middle of the nylon bushing 6, and a bushing spring 7 is arranged therein and passes through a limit bolt 9; a positioning groove is provided on the fixed base 8, and the positioning groove corresponds to the contact electrode spring 5 and the bushing spring 7, so that a pre-pressed state is formed between the bottom surface of the fixed base 8 and the nylon bushing 6; the limit bolt 9 is fixed by the thread fit with the threaded hole for the limit bolt on the fixed base 8, and a fastening nut 10 is provided at its end to prevent the limit bolt from loosening. Finally, these components cooperate to form a sliding contact electrode integrated complete set of devices 12 (as Figure 2 shown), in the sliding contact electrode integrated complete set of devices 12, the initial height between the bottom edge of the nylon bushing 6 and the fixed base 8 is T0;

[0048] An assembly method for a sliding contact electrode integrated complete set of devices for GIL three-pillar insulators and its GIL components, which is applied to the installation of the sliding contact electrode integrated complete set of devices and its GIL components, includes the following content:

[0049] The specific assembly steps are as follows: Before assembling the GIL unit, first assemble the integrated sliding contact pole device 12. Assemble the sliding contact pole 4 and the contact pole spring 5 to form two sub-assemblies. Subsequently, insert the assembled sub-assemblies into the corresponding sliding contact pole limit and guiding holes on the nylon bushing 6 in sequence. Then, install the bushing spring 7 from the bottom of the nylon bushing 6 into the bushing spring limit hole in the middle and pass it through the limit bolt 9. Through adjustment, ensure that the spring is centered and fits well with the limit hole. Then, align the positioning groove of the fixed base 8 with the positions of the contact pole spring 5 and the bushing spring 7. Manually snap and press the fixed base 8 to pre-compress the spring to a state where the fixed base 8 is close to fitting with the bottom surface of the nylon bushing 6. Then use an L-shaped hex wrench to rotate the limit bolt 9, pass it through the bushing spring and align it with the threaded hole on the fixed base 8 and tighten it. Finally, install the fastening nut 10 at the end of the limit bolt 9 to further ensure the stability and reliability of the device.

[0050] As Figure 1 and Figure 4 shown, when assembling the GIL unit, first set the particulate capture device 3 on the three-pillar insulator 2 and adjust the position of the grid holes 15 of the particulate capture device 3 to align it with the bottom area of the integrated sliding contact pole device 12. Then install two groups of nylon roller assemblies for the lower three-pillar insulator 2. Use an L-shaped hex key to tighten the upper particulate capture device fixing bolt 11 of the particulate capture device 3 to ensure its stable fixation. Finally, install the integrated sliding contact pole device 12 and install it on the grounding insert 21 at the end of the three-pillar insulator. By manually pressing the top force application area 13 of the nylon bushing 6, the device enters the manual pressing and compression assembly state (as Figure 4 shown). At this time, the distance between the bottom edge of the nylon bushing 6 and the fixed base 8 is T1, and 0 ≤ T1 < T0, and the distance from the top of the nylon bushing 6 to the inner wall of the metal-enclosed housing 1 is H1. During the pressing process, the sliding contact pole 4 moves downward synchronously under the reaction force of the contact pole spring 5, and at the same time, keep the distance that the sliding contact pole 4 protrudes from the surface of the nylon bushing 6 as S0, and make H1 > S0 to ensure that the sliding contact pole 4 will not interfere when entering the metal-enclosed housing 1. Finally, the sliding contact pole 4 smoothly enters the metal-enclosed housing 1;

[0051] Subsequently, slowly push the conductor (the core component for transmitting current in the GIL system) and its three-pillar insulator 2 into the interior of the metal-enclosed housing 1. During this process, adjust the clearance distance δ between the outer circle of the particulate capture device 3 and the inner wall circle of the metal-enclosed housing 1, and it is required to satisfy 0 < δ ≤ 10 mm to achieve an ideal metal particulate capture effect. When the integrated sliding contact pole device 12 approaches the flange opening 14, release the pressing force on the top force application area 13 of the nylon bushing 6, and the device enters the compression limit assembly operation state (as Figure 1 ,Figure 6 , Figure 7 as shown). In this state, the sliding contact pole 4 rebounds upward under the combined restoring force of the contact pole spring 5 and the bushing spring 7 until it is in close contact with the inner wall of the metal enclosed housing 1. Since the sliding contact pole 4 is made of self-lubricating and highly wear-resistant graphite copper alloy material, it has excellent electrical conductivity, low friction coefficient, and long service life. Even during the initial assembly, the influence of metal particles and surface scratches generated when the sliding contact pole 4 slides along the inner wall of the metal enclosed housing 1 to the designated position can be ignored, and at the same time, the sliding contact pole 4 and the inner wall of the metal enclosed housing 1 always maintain an efficient grounding conduction state.

[0052] The nylon bushing 6 rebounds under the restoring force of the springs 5 and 7, and its surface maintains a sliding contact with the inner wall of the metal enclosed housing 1. In the compressed limit assembly operation state:

[0053] The distance that the sliding contact pole descends with the spring compression is S1 (satisfying 0 ≤ S1 ≤ S0).

[0054] The distance from the nylon bushing to the inner wall of the metal enclosed housing is H2 (satisfying 0 ≤ H2 ≤ H1).

[0055] The distance from the bottom edge of the nylon bushing to the fixed base is T2 (satisfying T1 ≤ T2 < T0).

[0056] During the operation of the sliding contact pole integrated complete set 12, the particle collection groove 61 on the surface of the nylon bushing 6 can continuously collect the metal particles generated by the friction between the sliding contact pole 4 and the inner wall of the metal enclosed housing 1. At the same time, the particle collection sink 23 designed on the end grounding insert 21 of the three-pillar insulator further captures the metal particles falling from the surface of the nylon bushing 6, preventing them from penetrating into the epoxy resin surface area 22 along the gap of the connection surface between the insert and the particle capture device 3. This design effectively avoids the risk of surface discharge that may be caused by the accumulation of metal particles, thereby improving the operation reliability and safety of the device.

[0057] When the GIL unit is disassembled, as the inner conductor of the GIL unit and the GIL three-pillar insulator 2 are slowly removed, when the sliding contact integrated complete set 12 is separated from the inner wall of the metal enclosed housing 1, it rebounds instantaneously under the action of the return spring force of the contact spring 5 and the bushing spring 7. However, due to the restraint of the limit bolt 9, the rebound range of the sliding contact integrated complete set 12 is limited, and it only rebounds to the pre-compressed integrated state of the sliding contact integrated complete set 12. This design effectively avoids the risk that when the contact spring 5 and the bushing spring 7 rebound instantaneously from the compressed state to the free state, the sliding contact 4 and the nylon bushing 6 may bounce or fly out due to excessive return spring force. After the sliding contact integrated complete set 12 is completely separated from the inner wall of the metal enclosed housing 1, it maintains a stable integrated structure as a whole and can be directly taken out manually without additional fixation. This design significantly improves the convenience of disassembly operation, ensures that parts are not easily scattered or lost, and at the same time avoids potential safety hazards caused by bouncing.

[0058] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0059] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated complete set of sliding contact poles for a GIL three-pillar insulator and its GIL assembly, comprising a metal enclosed housing (1), a three-pillar insulator (2), a particle capture device (3) and an integrated complete set of sliding contact poles (12), characterized in that, The integrated sliding contact pole device (12) includes a sliding contact pole (4), a contact pole spring (5), a nylon bushing (6), and a fixed base (8). The nylon bushing (6) is provided with a sliding contact pole limiting hole and a guiding hole for accommodating the sub-assembly composed of the sliding contact pole (4) and the contact pole spring (5).

2. The integrated complete set of sliding contact poles for a GIL three-pillar insulator and its GIL components according to claim 1, characterized in that: The middle part of the nylon bushing (6) is provided with a bushing spring limiting hole, and a bushing spring (7) is installed inside and fixed by passing a limit bolt (9).

3. The integrated complete set of sliding contact poles for a GIL three-pillar insulator and its GIL components according to claim 1, characterized in that: The fixed base (8) is provided with a positioning groove, which corresponds to the contact pole spring (5) and the bushing spring (7), so that a pre-pressed state is formed between the fixed base (8) and the bottom surface of the nylon bushing (6).

4. The integrated complete set of sliding contact poles for a GIL three-pillar insulator and its GIL components according to claim 2, characterized in that: The limit bolt (9) is fixed by being in threaded fit with a threaded hole preset on the fixed base (8), and a fastening nut (10) is arranged at the end of the limit bolt (9) to prevent the limit bolt (9) from loosening.

5. An integrated complete set of sliding contact poles for a GIL three-pillar insulator and its GIL components according to claim 1, characterized in that: Before assembly, the initial height between the bottom edge of the nylon bushing (6) and the fixed base (8) is T0. In the pre-pressed state, the distance between the bottom edge of the nylon bushing (6) and the fixed base (8) is T1, and 0 ≤ T1 < T0 is satisfied.

6. A sliding contact electrode integrated complete set of devices for GIL three-pillar insulators and its GIL components according to any one of claims 1-5, characterized in that: Its assembly method includes the following steps: S11: First install the particle capture device (3) on the three-pillar insulator (2), and adjust the position of its grid holes (15) so that they are aligned with the bottom area of the integrated sliding contact pole device (12). S12: Install the nylon roller assemblies for the lower three-pillar insulators respectively. S13: Use an L-shaped hexagon socket wrench to tighten the upper fixing bolts (11) of the particle capture device (3). S14: Install the integrated sliding contact pole device (12) on the grounding insert (21) at the end of the three-pillar insulator.

7. An integrated complete set of sliding contact poles for a GIL three-pillar insulator and an assembly method for its GIL components, characterized in that: By applying a manual pressing force to the top of the nylon bushing (6), that is, the force application area (13), the integrated sliding contact pole device (12) enters the pre-compressed assembly state. At this time: The distance between the bottom edge of the nylon bushing (6) and the fixed base (8) is T1; The sliding contact pole (4) moves downward under the reaction force of the contact pole spring (5), and at the same time, its protruding distance on the nylon bushing (6) is S0; The distance from the top end of the nylon bushing (6) to the inner wall of the metal enclosed housing (1) is H1, and H1 > S0 is satisfied to prevent interference when the sliding contact pole (4) enters the metal enclosed housing (1).

8. An integrated complete set of sliding contact electrodes for a GIL three-pillar insulator and an assembly method for its GIL components, characterized in that: During the process of slowly pushing the conductor and the three-pillar insulator (2) into the interior of the metal enclosed housing (1), adjust the gap δ between the outer circle of the particle capture device (3) and the inner wall of the metal enclosed housing (1) so that 0 < δ ≤ 10 mm.

9. An integrated sliding contact pole complete set device for a GIL three-pillar insulator and an assembly method for its GIL components, characterized in that: When the integrated sliding contact pole device (12) approaches the flange opening (14), release the pressing force on the force application area (13) at the top of the nylon bushing (6) so that the device enters the compression limit assembly operation state. In this state: The sliding contact pole (4) moves upward under the combined resilience of the contact pole spring (5) and the bushing spring (7) until it is in close contact with the inner wall of the metal enclosed housing (1). Meanwhile, the following distance relationships are maintained: the descending distance of the sliding contact pole is S1 and satisfies 0 ≤ S1 ≤ S0, the distance from the nylon bushing (6) to the inner wall of the metal enclosed housing (1) is H2 and satisfies 0 ≤ H2 ≤ H1, and the distance from the bottom edge of the nylon bushing (6) to the fixed base (8) is T2 and satisfies T1 ≤ T2 < T0.

10. The integrated complete set of sliding contact poles for a GIL three-pillar insulator and the assembly method of its GIL components according to claim 6, characterized in that: During the disassembly process of the GIL unit, when the conductor and the three-pillar insulator (2) are slowly removed from the metal enclosed housing (1), during the process of the sliding contact pole integrated device (12) detaching from the inner wall of the metal enclosed housing (1), due to the resilience of the contact pole spring (5) and the bushing spring (7) and the restraint of the limit bolt (9), the device only rebounds to the pre-compressed state, thereby preventing the sliding contact pole (4) and the nylon bushing (6) from bouncing or flying out due to excessive spring resilience, ensuring the stability of the overall structure of the device and facilitating safe disassembly.

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