A fastening device for high voltage switchgear

Abstract

The application belongs to the technical field of high-voltage power distribution cabinet fastening, and discloses a fastening device for a high-voltage power distribution cabinet, which comprises a base, an I-steel rectangular frame installed on the top surface of the base, and a high-voltage power distribution cabinet body placed on the top of the I-steel rectangular frame, and further comprises: fasteners, which are provided in multiple sets, each set comprising two fasteners and being connected through a connecting clamp; the fasteners are used for fastening the high-voltage power distribution cabinet body and the I-steel rectangular frame; wherein the connecting clamp comprises a top-bottom abutting piece placed inside the I-steel rectangular frame; the fastening device is provided with the top-bottom abutting piece, the fasteners, a hydraulic linkage pressing structure, and a gear-and-rack transmission structure, which are matched together, and compared with the traditional single-bolt fastening mode, the fastening device effectively solves the technical defects of the outdoor high-voltage power distribution cabinet and the I-steel rectangular frame, such as easy loosening, uneven stress, poor stability, and weak anti-seismic performance, and has the advantages of multiple fastening, self-adaptive pressing, anti-loosening and anti-vibration, high installation precision, and adaptation to the long-term stable operation requirements of outdoor complex working conditions.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage switchgear fastening technology, specifically a fastening device for high-voltage switchgear. Background Technology

[0002] Outdoor high-voltage switchgear is widely used in outdoor substations, photovoltaic and wind power systems, and urban and rural outdoor power distribution networks. The equipment is installed on a rectangular steel channel frame embedded in the base. The reliability of the fastening between the switchgear and the channel steel directly affects the operational stability and safety performance of the high-voltage equipment. Currently, the installation and fixing of outdoor high-voltage switchgear to the channel steel frame generally uses a single ordinary bolt with flat washers and spring washers for locking. There is no dedicated fastening structure adapted to outdoor working conditions. The structure is rudimentary, and its drawbacks become prominent under long-term exposure to the complex outdoor environment, failing to meet the fastening requirements for long-term stable operation of the equipment.

[0003] The outdoor environment is subject to multiple influences such as alternating temperature differences, strong wind impacts, equipment closing vibrations, and slight foundation settlement. The structural stability relying solely on bolt preload and spring washers to prevent loosening is insufficient. After long-term operation, bolt preload is prone to decay, leading to loosening, stripping, or even detachment. This results in an increased gap between the cabinet and the channel steel, causing problems such as cabinet offset, shaking, and tilting.

[0004] Meanwhile, the bolts are tightened at a single point, resulting in a small contact area and extremely uneven stress. Long-term load-bearing can easily cause deformation of the channel steel flanges and wear on the cabinet base plate, leading to problems such as cabinet settlement and levelness deviation. Therefore, improvements are needed. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a fastening device for high-voltage switchgear.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fastening device for a high-voltage distribution cabinet, comprising a base, a concrete-cast rectangular steel channel frame installed on the top surface of the base, and a high-voltage distribution cabinet body placed on top of the rectangular steel channel frame, and further comprising: Fasteners, which are provided in multiples, in pairs and connected by connecting clips; used to fasten the high-voltage distribution cabinet body and the channel steel rectangular frame; The connecting clip includes top and bottom abutments placed inside the rectangular frame of the channel steel. The top and bottom abutments specifically include a housing. Both the upper and lower ends of the housing cavity are movably connected to rubber abutments. The adjacent ends of the two rubber abutments are connected to a screw abutment rod. The fastener includes a pressure block fixed to the top surface of the housing, an extension component is movably sleeved inside the pressure block, and a pressure plate is rotatably connected to the end of the extension component away from the pressure block; The extension component specifically includes an extension plate, and a locking block is movably connected inside the extension plate. One end of the locking block is engaged with the rotating end of the pressure plate component.

[0007] Preferably, the two screw rods are threaded together with a sleeve at their middle parts, and the upper and lower sides of the ends of the screw rods that abut against the rubber abutment are provided with bevels; Both sides of the rubber abutment are elastically connected to the housing via a first spring.

[0008] Preferably, a second spring is fixedly connected to the middle end of the screw rod near the side wall of the rubber abutment, and the end of the second spring away from the screw rod is fixedly connected to the inner wall of the housing; The second spring is located in the middle area between the upper and lower rubber plates.

[0009] Preferably, the screw rod is connected to the housing on both sides near the housing side by bolts.

[0010] Preferably, a beveled block is slidably connected inside the pressure block, and one end of the beveled block movably passes through the pressure block and extends to the outside of the pressure block; A third spring is movably sleeved at one end of the beveled block extending to the outside of the pressure block, and the beveled block is elastically connected to the pressure block through the third spring.

[0011] Preferably, the angled end of the angled block abuts against the bottom end of the high-voltage distribution cabinet body, and the inside of the pressure block is filled with hydraulic oil; When the angled block moves toward the third spring, it pushes the hydraulic oil to flow toward the upper part of the inner cavity of the pressure block and pushes the extension plate to move from the inside of the pressure block outward.

[0012] Preferably, the extension plate is slidably connected to the upper end of the inner cavity of the pressure block, and a fourth spring is fixedly connected to the middle end of the side wall of the extension plate away from the pressure plate, and the end of the fourth spring away from the extension assembly is fixedly connected to the pressure block. The outer side of the fourth spring is movably sleeved with a bellows for protecting the fourth spring, and the two ends of the bellows are fixedly connected to the extension plate and the pressure block, respectively.

[0013] Preferably, a horizontal plate slides on the upper end of the extension plate, the bottom end of the horizontal plate is elastically connected to the extension plate by a fifth spring, and a stop block is connected to one end of the horizontal plate, with an angled end between the stop block and the horizontal plate. The bottom end of the abutment block abuts against the locking block, and a sixth spring is fixedly connected to the bottom of the abutment block. The sixth spring is fixedly connected to the extension plate.

[0014] Preferably, one end of the card block is elastically connected to the extension plate via a tension spring; A toothed rack is fixed to one end of the card block that extends beyond the extension plate; the contact end between the card block and the abutment block is provided with an angle.

[0015] Preferably, the pressure plate includes a pressure plate rotatably connected to the extension plate via a rotating shaft, and the bottom end of the pressure plate abuts against the body of the high-voltage distribution cabinet; A spring plate for resetting the pressure plate is sleeved on the contact end between the rotating shaft and the extension plate, and a spur gear that meshes with the rack is fixed to the outer wall of the middle end of the rotating shaft.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the combination of top and bottom abutments, fasteners, hydraulic linkage clamping structure, and gear and rack transmission structure, effectively solves the technical defects of outdoor high-voltage distribution cabinets and channel steel rectangular frames, such as easy loosening, uneven stress, poor stability, and weak seismic performance, compared with the traditional single bolt fastening method. It has the advantages of multiple fastening, self-adaptive clamping, anti-loosening and vibration resistance, and high installation accuracy, and is suitable for the long-term stable operation requirements of complex outdoor working conditions.

[0017] This invention features top and bottom abutments at the four corners of a rectangular channel steel frame. A rotating sleeve drives a screw rod to push rubber abutments outwards, ensuring the upper and lower rubber abutments tightly fit against the upper and lower inner walls of the rectangular channel steel frame. This achieves pre-tightening and limiting of the channel steel frame, and rigid fixation is completed using locking bolts. This structure effectively adapts to different types of rectangular channel steel frames, effectively preventing displacement and swaying during operation, and significantly improving overall installation accuracy and assembly stability.

[0018] This invention utilizes the cabinet's own weight to trigger a hydraulic linkage transmission structure. During the downward pressing of the high-voltage distribution cabinet body, the angled block is squeezed, pushing the hydraulic oil inside the pressure block to achieve pressure transmission. This drives the extension plate and horizontal plate to move in linkage, thereby pushing the abutment block downward to press against the locking block. In conjunction with the meshing transmission of the rack and pinion gears, the pressure plate is driven to flip downward to press against the bottom surface of the inner cavity of the high-voltage distribution cabinet body. Through the adaptive pressing structure of hydraulic and gear combination, the traditional single-point bolt concentrated pressing method is replaced, achieving large-area, uniform, and gapless pressing of the cabinet body. This effectively solves the problem of uneven force distribution in traditional bolt tightening and effectively ensures a tight fit between the cabinet body and the channel steel frame.

[0019] This invention employs a multi-layered fastening and protection system, featuring four-corner clamping positioning, central adaptive compression, and end bolt locking, abandoning the rudimentary structure of traditional single bolts relying solely on preload for loosening prevention. Addressing harsh operating conditions such as alternating outdoor temperature differences, strong wind impacts, equipment closing vibrations, and slight foundation settlement, it effectively prevents bolt preload attenuation, loosening, stripping, and even detachment that can occur during long-term operation. This significantly enhances the device's anti-loosening, vibration resistance, and anti-distortion capabilities. Simultaneously, it avoids the maintenance difficulties caused by traditional bolt thread corrosion and jamming, reducing the maintenance costs of equipment inspection, relocation, and modification. It significantly improves the overall installation stability and operational safety of outdoor high-voltage switchgear, extends equipment lifespan, and adapts to the long-term stable operation requirements of various outdoor high-voltage power distribution scenarios. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the high-voltage distribution cabinet body and connecting card structure of the present invention; Figure 3 This is a schematic diagram of the structure of the connecting card and fastener of the present invention; Figure 4 This is a structural schematic diagram of the channel steel rectangular frame and the high-voltage distribution cabinet body of the present invention; Figure 5 This is a detailed structural diagram of the connecting card component of the present invention; Figure 6 for Figure 5 A magnified view of the structure at point A in the middle; Figure 7 This is a schematic diagram showing the detailed structure of the fastener of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point B in the middle; Figure 9 for Figure 8 A magnified schematic diagram of the structure at point C in the middle; Figure 10 This is a detailed structural diagram of the pressure plate component of the present invention.

[0021] In the picture: 100. Base; 200. Channel steel rectangular frame; 300. High-voltage distribution cabinet body; 400. Connecting clip; 410. Sleeve; 420. Screw abutment; 430. Bolt; 440. Top and bottom abutments; 441. Housing; 442. Rubber abutment plate; 443. First spring; 450. Second spring; 500. Fastener; 510. Pressure block; 520. Angled block; 530. Third spring; 540. Bellows; 550. Fourth spring; 560. Extension assembly; 561. Extension plate; 562. Horizontal plate; 563. Fifth spring; 564. Abutment block; 565. Sixth spring; 566. Locking block; 567. Tension spring; 568. Rack; 570. Pressure plate; 571. Pressure plate; 572. Shaft; 573. Spring sheet; 574. Spur gear. Detailed Implementation

[0022] 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.

[0023] like Figures 1 to 10 As shown, the present invention provides a fastening device for a high-voltage distribution cabinet, including a base 100, a channel steel rectangular frame 200 cast in concrete and installed on the top surface of the base 100, and a high-voltage distribution cabinet body 300 placed on top of the channel steel rectangular frame 200, and further including: Fasteners 500, which are provided in multiples, are connected in pairs by connecting clips 400; used to fasten the high-voltage distribution cabinet body 300 and the channel steel rectangular frame 200. Among them, the connecting clip 400 includes top and bottom abutments 440 placed inside the channel steel rectangular frame 200. The top and bottom abutments 440 specifically include a housing 441. Both the upper and lower ends of the inner cavity of the housing 441 are movably connected to rubber abutments 442. The adjacent ends of the two rubber abutments 442 are connected to a screw abutment 420. The fastener 500 includes a pressure block 510 fixed to the top surface of the housing 441. An extension component 560 is movably sleeved inside the pressure block 510. A pressure plate 570 is rotatably connected to one end of the extension component 560 away from the pressure block 510. The extension assembly 560 specifically includes an extension plate 561, and a locking block 566 is movably connected inside the extension plate 561. One end of the locking block 566 is engaged with the rotating end of the pressure plate 570.

[0024] The above solution is adopted: the internal bidirectional clamping and limiting of the channel steel rectangular frame 200 is achieved by the built-in top and bottom abutments 440 of the connecting clip 400. In conjunction with multiple sets of fasteners 500, extension components 560 and pressure plate components 570, an overall linkage fastening structure is formed, which can simultaneously achieve vertical clamping and lateral limiting of the high-voltage distribution cabinet body 300 and the channel steel rectangular frame 200, solving the problems of single-point fixing, easy loosening and poor overall integrity of traditional fastening methods; the interlocking linkage structure of the clip block 566 realizes the angle adaptive locking of the pressure plate component 570, adapting to the installation deviation of the distribution cabinet, and improving the overall assembly stability and structural adaptability.

[0025] The two screw rods 420 are threaded together with a sleeve 410 in the middle. The upper and lower sides of the screw rods 420 that are used to abut against the rubber abutment plate 442 are provided with bevels. Both sides of the rubber abutment plate 442 are elastically connected to the housing 441 through the first spring 443.

[0026] The above solution is adopted: the screw rods 420 on both sides move synchronously in opposite directions through the threaded transmission of the sleeve 410. With the beveled structure at the end of the screw rods 420, the horizontal pushing force is converted into a vertical component force, and the upper and lower rubber plates 442 are squeezed in both directions to achieve bidirectional clamping. The first spring 443 can realize the elastic reset and adaptive fit of the rubber plate 442, effectively eliminating the assembly gap inside the channel steel frame, avoiding loosening of the fasteners caused by equipment operation vibration. At the same time, the rubber plate 442 has the effects of buffering vibration reduction, noise reduction and anti-slip, improving the stability of high-voltage equipment operation.

[0027] A second spring 450 is fixedly connected to the middle end of the screw rod 420 near the side wall of the rubber abutment plate 442. The end of the second spring 450 away from the screw rod 420 is fixedly connected to the inner wall of the housing 441. The second spring 450 is located in the middle area between the upper and lower rubber abutment plates 442.

[0028] The above solution is adopted: the second spring 450 forms a central elastic limit on the screw rod 420, so that the screw rod 420 is normally kept in a centered state, avoiding long-term force deviation and jamming, and ensuring uniform and stable pushing force on both sides; at the same time, it can offset the slight displacement caused by equipment vibration, prevent the screw rod 420 from hitting the rubber plate 442 hard, and improve the vibration resistance and transmission stability of the overall structure of the top and bottom abutments 440.

[0029] The screw rod 420 is connected to the housing 441 on both sides near the housing 441 by bolts 430.

[0030] The above solution is adopted: the screw rod 420 and the housing 441 are detachably limited by bolts 430, which ensures that the screw rod 420 only performs directional telescopic movement and does not shift or fall off, and facilitates disassembly, maintenance and replacement of parts in the later stage, reducing equipment operation and maintenance costs and improving the overall ease of disassembly and assembly and structural reliability of the device.

[0031] An angled block 520 is slidably connected inside the pressure block 510. One end of the angled block 520 moves through the pressure block 510 and extends to the outside of the pressure block 510. A third spring 530 is movably sleeved on the outside of the end of the angled block 520 extending to the outside of the pressure block 510. The angled block 520 is elastically connected to the pressure block 510 through the third spring 530.

[0032] The above solution is adopted: the beveled block 520 can adaptively fit the bottom contour of the high-voltage distribution cabinet body 300, and the third spring 530 provides elastic pre-tightening force for the beveled block 520 to achieve adaptive buffering and avoid damage to the cabinet paint and stress concentration caused by hard compression; at the same time, it can automatically adjust the position according to the flatness of the cabinet installation to adapt to different assembly errors and improve the fastening and fitting accuracy.

[0033] The angled end of the angled block 520 abuts against the bottom end of the high-voltage distribution cabinet body 300. The inside of the pressure block 510 is filled with hydraulic oil. When the angled block 520 moves toward the third spring 530, it will push the hydraulic oil to flow toward the upper part of the inner cavity of the pressure block 510 and push the extension plate 561 to move outward from the inside of the pressure block 510.

[0034] The above solution utilizes the principle of hydraulic transmission to convert the vertical pressure of the cabinet on the angled block 520 into hydraulic driving force, which automatically pushes the extension plate 561 outward, achieving a linkage effect of automatic extension under pressure and self-adaptive fastening, without the need for manual adjustment of the stretching length; the hydraulic transmission has uniform force distribution and strong buffering capacity, and can achieve pressure self-locking and stabilization, effectively avoiding fastening loosening caused by vibration and temperature deformation during the operation of the high-voltage distribution cabinet, and greatly improving fastening stability.

[0035] The extension plate 561 is slidably connected to the upper end of the inner cavity of the pressure block 510, and a fourth spring 550 is fixedly connected to the middle end of the side wall of the extension plate 561 away from the pressure plate 570. The end of the fourth spring 550 away from the extension assembly 560 is fixedly connected to the pressure block 510. A bellows 540 for protecting the fourth spring 550 is movably sleeved on the outside of the fourth spring 550. The two ends of the bellows 540 are fixedly connected to the extension plate 561 and the pressure block 510 respectively.

[0036] Using the above scheme: the fourth spring 550 can provide a reset preload force for the extension plate 561, so that the device can automatically retract and reset after disassembly, which is convenient for repeated assembly and use.

[0037] A horizontal plate 562 slides on the upper end of the extension plate 561. The bottom end of the horizontal plate 562 is elastically connected to the extension plate 561 via a fifth spring 563. One end of the horizontal plate 562 is connected to a stop block 564, and the contact end between the stop block 564 and the horizontal plate 562 is provided with an angle. The bottom end of the stop block 564 abuts against the locking block 566. A sixth spring 565 is fixedly connected to the bottom of the stop block 564, and the sixth spring 565 is fixedly connected to the extension plate 561.

[0038] The above scheme is adopted: the horizontal plate 562, the fifth spring 563, the stop block 564 and the sixth spring 565 form an oblique elastic linkage structure, which can adaptively trigger the pressing action according to the extension displacement of the extension plate 561, and accurately push the displacement adjustment of the locking block 566 to realize mechanical self-locking triggering automation without the need for manual locking; multiple sets of springs cooperate with oblique angle transmission, which is sensitive and has a high fault tolerance, effectively improving the locking accuracy and linkage reliability of the device.

[0039] One end of the locking block 566 is elastically connected to the extension plate 561 via a tension spring 567; a rack 568 is fixedly connected to the end of the locking block 566 that extends outside the extension plate 561; the contact end between the locking block 566 and the abutment block 564 is provided with an angle.

[0040] The above solution is adopted: the tension spring 567 realizes the elastic reset of the locking block 566, and the rack 568 structure achieves precise meshing transmission. The angled contact surface ensures that the force is smooth and there is no jamming when the block 564 is pressed down. The meshing position of the rack 568 can be adaptively adjusted according to the fastening stroke to achieve stroke locking, which meets the fastening requirements of high voltage distribution cabinets of different specifications and has strong versatility.

[0041] The pressure plate component 570 includes a pressure plate 571 rotatably connected to the extension plate 561 via a rotating shaft 572. The bottom end of the pressure plate 571 abuts against the high-voltage distribution cabinet body 300. A spring plate 573 for resetting the pressure plate 571 is sleeved on the contact end between the rotating shaft 572 and the extension plate 561. A spur gear 574 that meshes with a rack 568 is fixedly connected to the outer wall of the middle end of the rotating shaft 572.

[0042] The above solution is adopted: through the meshing transmission of rack 568 and spur gear 574, the linear displacement of the locking block 566 is converted into the rotation angle of the rotating shaft 572, which drives the pressure plate 571 to adaptively rotate and fit against the cabinet surface for pressing and adaptation; the spring plate 573 can realize the automatic reset and pre-tightening of the pressure plate 571, forming a multi-fastening structure of hydraulic automatic extension + gear and rack angle self-adaptation + elastic self-locking anti-loosening, effectively solving the industry pain points of traditional distribution cabinet fastening such as skewed fastening, uneven force, and vibration loosening, and greatly improving the installation stability, safety and seismic performance of high voltage distribution cabinet.

[0043] Working principle and usage process of this invention: First, two sets of four top and bottom abutments 440 and matching fasteners 500 are positioned at the four corners of the channel steel rectangular frame 200 to complete the overall positioning. The operator manually rotates the sleeve 410, driving two sets of symmetrically arranged screw abutments 420 to move outwards synchronously. This causes the ends of the screw abutments 420 to push against the corresponding rubber abutments 442, allowing the rubber abutments 442 to extend smoothly outwards along the internal guide structure of the housing 441. By adjusting the rotation stroke of the sleeve 410, the upper and lower sets of rubber abutments 442 are tightly pressed against the upper and lower inner walls of the channel steel rectangular frame 200, completely conforming to the channel steel wall surface, eliminating assembly gaps, and achieving the limiting and clamping of the four corner top and bottom abutments 440 with the channel steel rectangular frame 200. Finally, tighten the locking bolts 430 to rigidly fix the relative position of the screw rod 420 and the housing 441, lock the overall adjustment structure, and avoid displacement or loosening during subsequent assembly and equipment operation. This completes the pre-installation and fixing of the four corner auxiliary positioning structure of the channel steel rectangular frame 200.

[0044] Secondly, the high-voltage distribution cabinet body 300 is smoothly hoisted and placed on the top surface of the rectangular steel frame 200. During the downward pressure of the cabinet body, the bottom of the distribution cabinet body will abut against the inclined end face of the beveled block 520 on the outside of the pressure block 510. Utilizing the gravitational potential energy of the downward pressure of the cabinet body, the beveled block 520 is continuously squeezed, causing it to contract and displace inward, simultaneously pushing the hydraulic oil in the sealed cavity inside the pressure block 510. Under the transmission of hydraulic pressure, the hydraulic oil in the cavity flows upward in a directional direction, pushing the extension plate 561 to extend smoothly outward along the internal track of the pressure block 510. During the extension of the extension plate 561, the horizontal plate 562, which is slidably mounted with it, moves synchronously, gradually and vertically abutting the bottom block 564, forcing the bottom block 564 to move downward along the vertical track.

[0045] During the downward movement of the abutment block 564, the end of the clamping block 566 is continuously pressed, causing the clamping block 566 to slide horizontally away from the abutment block 564. Simultaneously, the rack 568 at the bottom of the clamping block 566 moves synchronously, engaging with the spur gear 574 on the outer side to form a gear transmission, driving the spur gear 574 to rotate in a specific direction. The rotational torque of the spur gear 574 causes the hinged pressure plate 571 to flip downwards synchronously, ultimately causing the pressing end of the pressure plate 571 to tightly press against the bottom surface of the inner cavity of the high-voltage distribution cabinet body 300. Utilizing the hydraulic transmission and gear linkage structure, the cabinet achieves self-adaptive, gapless pressing and limiting, significantly improving the cabinet's fit and fastening effect, and effectively avoiding problems such as gap loosening and uneven force distribution found in traditional assembly methods.

[0046] Finally, based on the above adaptive clamping and limiting, the channel steel rectangular frame 200 and the high-voltage distribution cabinet body 300 are finally locked and fixed by matching fastening bolts, realizing the dual fixation of the cabinet and the channel steel base. Combined with the previous four-corner clamping positioning and the central adaptive clamping structure, a multi-layer fastening and protection system is constructed.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fastening device for a high-voltage distribution cabinet, comprising a base (100), a channel steel rectangular frame (200) cast in concrete and installed on the top surface of the base (100), and a high-voltage distribution cabinet body (300) placed on top of the channel steel rectangular frame (200), characterized in that: Also includes: Fasteners (500) are provided in multiples, in pairs and connected by connecting clips (400); Used to fasten the high-voltage distribution cabinet body (300) and the channel steel rectangular frame (200); The connecting clip (400) includes a top and bottom abutment (440) placed inside the rectangular frame (200) of the channel steel. The top and bottom abutment (440) specifically includes a housing (441). Both the upper and lower ends of the inner cavity of the housing (441) are movably connected to rubber abutment plates (442). The adjacent ends of the two rubber abutment plates (442) are connected to a screw abutment rod (420). The fastener (500) includes a pressure block (510) fixed to the top surface of the housing (441), an extension component (560) is movably sleeved inside the pressure block (510), and a pressure plate (570) is rotatably connected to one end of the extension component (560) away from the pressure block (510). The extension component (560) specifically includes an extension plate (561), and a locking block (566) is movably connected inside the extension plate (561). One end of the locking block (566) is engaged with the rotating end of the pressure plate (570).

2. The fastening device for a high-voltage switchgear according to claim 1, characterized in that: The two screw rods (420) are threaded together with a sleeve (410) at their middle parts. The upper and lower sides of the screw rods (420) that are used to abut against the rubber abutment (442) are provided with bevels. Both sides of the rubber abutment (442) are elastically connected to the housing (441) by a first spring (443).

3. The fastening device for a high-voltage distribution cabinet according to claim 2, characterized in that: A second spring (450) is fixedly connected to the middle end of the screw rod (420) near the side wall of the rubber abutment plate (442), and the end of the second spring (450) away from the screw rod (420) is fixedly connected to the inner wall of the housing (441); The second spring (450) is located in the middle area between the upper and lower rubber abutments (442).

4. The fastening device for a high-voltage distribution cabinet according to claim 3, characterized in that: The screw rod (420) is connected to the housing (441) on both sides near the housing (441) by bolts (430).

5. The fastening device for a high-voltage distribution cabinet according to claim 1, characterized in that: An angled block (520) is slidably connected inside the pressure block (510), and one end of the angled block (520) moves through the pressure block (510) and extends to the outside of the pressure block (510). The beveled block (520) extends to the outside of the pressure block (510) and is externally fitted with a third spring (530). The beveled block (520) is elastically connected to the pressure block (510) through the third spring (530).

6. The fastening device for a high-voltage distribution cabinet according to claim 5, characterized in that: The angled end of the beveled block (520) abuts against the bottom end of the high-voltage distribution cabinet body (300), and the inside of the pressure block (510) is filled with hydraulic oil. When the chamfered block (520) moves toward the third spring (530), it pushes the hydraulic oil to flow toward the upper region of the inner cavity of the pressure block (510) and pushes the extension plate (561) to move outward from the inside of the pressure block (510).

7. The fastening device for a high-voltage distribution cabinet according to claim 6, characterized in that: The extension plate (561) is slidably connected to the upper end of the inner cavity of the pressure block (510), and a fourth spring (550) is fixedly connected to the middle end of the side wall of the extension plate (561) away from the pressure plate (570). The end of the fourth spring (550) away from the extension assembly (560) is fixedly connected to the pressure block (510). The fourth spring (550) is movably sleeved with a bellows (540) for protecting the fourth spring (550), and the two ends of the bellows (540) are fixedly connected to the extension plate (561) and the pressure block (510) respectively.

8. The fastening device for a high-voltage switchgear according to claim 1, characterized in that: A horizontal plate (562) slides on the upper end of the extension plate (561). The bottom end of the horizontal plate (562) is elastically connected to the extension plate (561) through a fifth spring (563). One end of the horizontal plate (562) is connected to a stop block (564). The contact end between the stop block (564) and the horizontal plate (562) is provided with an angle. The bottom end of the abutment block (564) abuts against the locking block (566), and a sixth spring (565) is fixedly connected to the bottom of the abutment block (564), and the sixth spring (565) is fixedly connected to the extension plate (561).

9. The fastening device for a high-voltage distribution cabinet according to claim 8, characterized in that: One end of the card block (566) is elastically connected to the extension plate (561) via a tension spring (567); A rack (568) is fixed to one end of the locking block (566) extending outside the extension plate (561); the contact end between the locking block (566) and the abutment block (564) is provided with an angle.

10. The fastening device for a high-voltage distribution cabinet according to claim 1, characterized in that: The pressure plate (570) includes a pressure plate (571) rotatably connected to an extension plate (561) via a pivot (572), and the bottom end of the pressure plate (571) abuts against the high-voltage distribution cabinet body (300). A spring plate (573) for resetting the pressure plate (571) is sleeved on the contact end of the rotating shaft (572) and the extension plate (561). A spur gear (574) that meshes with the rack (568) is fixed to the outer wall of the middle end of the rotating shaft (572).

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