On-site fast-assembly fence unit, system and method

Abstract

The invention discloses an on-site fast-assembly fence unit, system and method, and relates to the technical field of electric power engineering safety protection. Comprising a single fence body (1), a T-shaped support (2) capable of being movably stored and a pressing type connecting device (3). The T-shaped support (2) is a foldable connecting rod mechanism composed of a T-shaped support vertical plate (201), a plurality of sets of movable connecting plates and pin shafts, and the T-shaped support (2) can be pulled downwards to be unfolded into a T-shaped supporting structure perpendicular to the fence body or can be stored in a longitudinal groove in the side face of the fence body after being folded. The connecting device (3) is arranged at the end of the fence body and composed of a buckle plate (301), a clamping column (302), a spring guide column (303) and a rotary pin shaft (305), and the multiple fence bodies can be rapidly connected and unlocked by pressing the spring guide column. In addition, the invention further comprises a fence system formed by connecting a plurality of portable fence units end to end, and a corresponding use method (fence connection and T-shaped support unfolding / folding steps). The device does not need to be embedded or fixed through bolts, meets the temporary operation requirements of the pumped storage power station, and has portability, quick installation and reusability.

Description

Technical Field

[0001] This invention relates to the field of power engineering safety protection technology, specifically to a quick-installation fencing unit, system, and method for temporary operations such as temporary maintenance of pumped storage power station units, outdoor equipment maintenance, and emergency fault isolation. Background Technology

[0002] As a key component of the energy system, pumped storage power stations operate under highly temporary and mobile conditions, encompassing various needs such as temporary unit maintenance, outdoor equipment upkeep, and emergency fault isolation (e.g., oil leaks, construction area fencing). The core requirements for safety fencing in these scenarios focus on portability, rapid deployment capability, non-destructive ground treatment, and reusability. It must meet the demands of short-term setup and rapid evacuation while avoiding damage to the power station's epoxy flooring, concrete foundations, and other facilities, while also adapting to the stability requirements of different environments, including underground powerhouses and open outdoor areas.

[0003] In the prior art, Chinese Patent Publication No. CN115522811B discloses an invention that discloses a pre-embedded quick-plug fence for hydropower stations, including a pre-embedded box (1) pre-embedded in the ground, a vertical return spring (2) provided in the middle of the pre-embedded box (1), wedge-shaped self-locking devices (3) provided on both sides of the vertical return spring (2), and a cover (4) provided on the top of the pre-embedded box (1); it also includes plug-in posts (5) that cooperate with the wedge-shaped self-locking devices (3), and a fence (6) provided between adjacent plug-in posts (5). The invention has the characteristics of convenient installation and no damage to the ground.

[0004] Furthermore, pumped-storage power stations face specific challenges in certain operational scenarios: in densely populated areas such as underground powerhouses, it's crucial to prevent unauthorized personnel from accidentally unlocking the fence; in open outdoor areas, the fence must withstand certain wind loads to prevent it from toppling and damaging equipment; and in emergency situations, it must be operable by a single person without tools for rapid isolation. Existing fence products are not designed to accommodate these specific scenarios, leading to frequent issues in their practical application at pumped-storage power stations, including low deployment efficiency, ground damage, insufficient stability, and poor portability. This not only affects maintenance progress but also increases safety management risks. Therefore, developing a temporary fence that adapts to diverse temporary operational scenarios at pumped-storage power stations and possesses core advantages such as portability, rapid installation, non-damaging ground operation, and stable reliability is a key requirement for addressing current technical challenges. Summary of the Invention

[0005] The technical problem to be solved by this invention is to address the shortcomings of the prior art by disclosing a quick-installation fence unit, system and method, which solves the problems of poor portability, cumbersome installation and easy damage to the ground of traditional fences in the temporary isolation scenario of pumped storage power stations.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a field quick-installation fence unit, system and method, comprising: a single fence body, a T-shaped bracket that can be movably stored on the side of the fence body, and a press-type connecting device disposed at the end of the fence body;

[0007] The T-shaped bracket is movably connected to the main body of the fence and has an extended support state and a retracted storage state.

[0008] In the supported state, the T-shaped bracket is perpendicular to the fence body to provide support;

[0009] In the retracted state, the T-shaped bracket is pulled down and rotated to a position parallel to the side of the fence body, and is retracted into the side of the fence body;

[0010] The connecting device is used for the movable connection, locking, and release between multiple fence panels.

[0011] Furthermore:

[0012] The T-shaped bracket includes: a T-shaped bracket upright plate, a first T-shaped bracket upper movable connecting plate, a second T-shaped bracket upper movable connecting plate, a first T-shaped bracket lower movable connecting plate, a second T-shaped bracket lower movable connecting plate, a first upper connecting pin, a second upper connecting pin, a first connecting pin, and a second connecting pin;

[0013] The upper end of the movable connecting plate on the first T-shaped bracket is hinged to the lower end of the upright plate of the T-shaped bracket via the first upper connecting pin.

[0014] The upper end of the movable connecting plate on the second T-shaped bracket is hinged to the lower end of the upright plate of the T-shaped bracket via the second upper connecting pin.

[0015] The upper end of the lower movable connecting plate of the first T-shaped bracket is hinged to the lower end of the upper movable connecting plate of the first T-shaped bracket via the first connecting pin, and the upper end of the lower movable connecting plate of the second T-shaped bracket is hinged to the lower end of the upper movable connecting plate of the second T-shaped bracket via the second connecting pin.

[0016] The lower end of the lower movable connecting plate of the first T-shaped bracket is hinged to the lower end of the lower movable connecting plate of the second T-shaped bracket via a third connecting pin.

[0017] The movable connecting plate on the first T-shaped bracket, the movable connecting plate on the second T-shaped bracket, the movable connecting plate on the lower part of the first T-shaped bracket, and the movable connecting plate on the lower part of the second T-shaped bracket form a foldable linkage mechanism through the first connecting pin, the second connecting pin, and the third connecting pin, so as to realize the pull-down action of the T-shaped bracket and the switching between support / storage state.

[0018] Furthermore:

[0019] The connecting device is vertically inserted into the end of the fence main unit to connect the two fence main units, and the two fence main units are connected with their sides parallel and attached; the top of each fence main unit is provided with a vertical mounting groove with a top opening.

[0020] The connecting device includes: a buckle plate, a buckle post, a spring guide post, a spring, a rotary pin, and a positioning protrusion;

[0021] The locking post protrudes from the left end of the buckle plate on the side facing the main body of the fence.

[0022] The spring guide post is fixedly connected to the right end of the buckle plate facing the main body of the fence. The spring is sleeved on the outside of the spring guide post, and the upper end of the spring abuts against the buckle plate facing the main body of the fence.

[0023] The positioning protrusion is provided in the middle of the buckle plate;

[0024] The right side of the main body of the fence is provided with a positioning groove, and a horizontal locking hole is opened in the positioning groove for the locking post to be vertically locked in.

[0025] Furthermore:

[0026] The locking post is a cylindrical structure with its axis set in the horizontal direction;

[0027] The rotary pin is a cylindrical structure with its axis set vertically, and the axis of the locking pin is perpendicular to the axis of the rotary pin.

[0028] The rotary pin is used to pass through the middle of the positioning protrusion in the horizontal direction to realize the locking assembly of the connecting device and the two fence main units;

[0029] The positioning protrusion has a through hole in the middle to accommodate the through-hole of the rotary pin.

[0030] The slewing pin restricts the lateral displacement of the connecting device after passing through the through hole;

[0031] When the spring guide post is pressed down, the spring guide post causes the spring to compress, and simultaneously drives the locking post to tilt upwards along the vertical direction toward the side of the buckle plate, so that the locking post disengages from the horizontal locking hole of the corresponding fence main unit, thereby releasing the initial locking state.

[0032] Furthermore:

[0033] The outer wall of the extended part of the rotary pin is provided with anti-slip texture. When the rotary pin passes through the through hole of the positioning protrusion, the anti-slip texture can enhance the friction and prevent the rotary pin from loosening due to vibration during use.

[0034] The through-hole positioning of the rotary pin can directly fix the relative position of the connecting device and the two fence main units, ensuring that the two fence main units always maintain a parallel and close side position.

[0035] Furthermore:

[0036] The buckle plate is an integral structure and is fixedly connected to the upper end of the buckle post, the upper end of the spring, and the upper end of the spring guide post to ensure the structural stability of each component of the connecting device.

[0037] Furthermore:

[0038] The fence body has longitudinal grooves on both sides for accommodating the T-shaped bracket; when the T-shaped bracket is in the retracted state, the outer surface of the T-shaped bracket is flush with the outer surface of the fence body.

[0039] Furthermore:

[0040] The connecting device is provided on at least one side of the main body of the fence, and a detachable connection is achieved with another adjacent main body of the fence through the connecting device.

[0041] A fencing system, consisting of on-site quick-installation fencing units connected end to end.

[0042] A method for using a quick-installation fencing unit, device, and method includes the following steps:

[0043] S1: Fence connection steps: Press the spring guide post of the connection device to make the locking post retract vertically towards the buckle plate side;

[0044] Align the connecting device with the mounting slots at the ends of the two fence main units and insert it until the sides of the two fence main units are completely parallel and fit together, and the positioning protrusion under the buckle plate is adapted to the mounting slot at the end of one of the fence main units.

[0045] Release the spring guide post, and the spring resets, driving the locking post to vertically engage with the horizontal locking hole of the corresponding fence main unit positioning slot, thus forming a preliminary lock;

[0046] Insert the slewing pin horizontally from front to back into the through hole of the positioning protrusion to form a secondary lock and complete the connection of the two fence main units; repeat the above operation if multiple fence main units need to be connected.

[0047] S2: T-shaped bracket deployment steps: Remove the T-shaped bracket from the longitudinal groove on the side of the fence body, and pull down the upper movable plate of the first T-shaped bracket, the upper movable plate of the second T-shaped bracket, the lower movable plate of the first T-shaped bracket, and the lower movable plate of the second T-shaped bracket in the direction away from the upright plate of the T-shaped bracket, so that each movable plate rotates around the corresponding pin until it is perpendicular to the upright plate of the T-shaped bracket, forming a T-shaped support structure; S3: T-shaped bracket storage steps: Push each movable plate of the T-shaped bracket upwards so that it rotates around the corresponding pin until it is parallel to the upright plate of the T-shaped bracket, and then push the entire T-shaped bracket into the longitudinal groove on the side of the fence body to complete the storage.

[0048] Compared with the prior art, the present invention has the following advantages:

[0049] This invention, the "retractable T-shaped bracket," replaces the traditional pre-embedded / bolt-fixed structure. After unfolding, the T-shaped bracket directly contacts and supports the ground, eliminating the need for any drilling or pre-embedding operations on the pumped storage power station ground, thus completely avoiding ground damage. At the same time, each fence panel can be moved independently without relying on pre-set fixed points, flexibly adapting to the mobile isolation needs of temporary unit maintenance and temporary hazardous areas (such as oil leak points and temporary construction areas).

[0050] The integrated storage structure significantly improves portability. The T-shaped bracket adopts a folding linkage mechanism of "upper / lower movable connecting plate + pin shaft". When storing, it can be rotated upward to be parallel to the side of the fence body, and then pushed into the longitudinal groove on the side of the fence as a whole. Finally, the outer surface of the T-shaped bracket is flush with the fence body. The volume of a single fence after storage is reduced by more than 40% compared with traditional fences with brackets, which is convenient for batch stacking and transportation (such as transporting 10-15 pieces at a time by power station inspection vehicle), reducing on-site handling costs.

[0051] The push-button quick connection simplifies operation and improves efficiency. The connection device adopts a self-resetting structure of "spring guide post + locking post": when splicing, simply press the spring guide post to retract the locking post, align it with the locking hole of the adjacent fence, and release it. The spring will reset to complete the locking. When disassembling, press the spring guide post again to unlock. No tools are required throughout the process. A single person can complete the splicing / disassembly of a single fence piece in 10-15 seconds, which is 3-5 times more efficient than traditional bolt connections. It is especially suitable for emergency temporary isolation scenarios in pumped storage power stations. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the overall structure of the portable fence for pumped storage power stations according to the present invention;

[0053] Figure 2 This is a side view of the overall structure of the portable fence for pumped storage power stations according to the present invention;

[0054] Figure 3 This is an open side view of the portable T-shaped fence structure for pumped storage power stations of the present invention.

[0055] Figure 4 This is a schematic diagram of the portable T-shaped fence structure for pumped storage power stations according to the present invention;

[0056] Figure 5 This is a structural diagram of the portable fence connector device for pumped storage power stations according to the present invention.

[0057] Figure Labels

[0058] 1-Fence body, 2-T-shaped bracket, 3-Connecting device;

[0059] 201-T-shaped bracket upright plate, 202-First upper connecting pin, 203-Second upper connecting pin, 204-First T-shaped bracket upper movable connecting plate, 205-Second T-shaped bracket upper movable connecting plate, 206-First connecting pin, 207-Second connecting pin, 208-First T-shaped bracket lower movable connecting plate, 209-Second T-shaped bracket lower movable connecting plate, 210-Third connecting pin;

[0060] 301-Snap plate, 302-Snap post, 303-Spring guide post, 304-Spring, 305-Rotation pin, 306-Positioning protrusion, 307-Positioning groove. Detailed Implementation

[0061] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0062] Example 1

[0063] like Figure 1 The invention illustrates the overall structure of the portable fence for pumped storage power stations, including: a single fence body 1, a T-shaped bracket 2 that can be movably stored on the side of the fence body 1, and a press-type connecting device 3 disposed at the end of the fence body 1.

[0064] The T-shaped bracket 2 is movably connected to the fence body 1 and has an extended support state and a retracted storage state.

[0065] In the supported state, the T-shaped bracket 2 is perpendicular to the fence body 1 to provide support;

[0066] In the retracted state, the T-shaped bracket 2 is pulled down and rotated to a position parallel to the side of the fence body 1, and is retracted into the side of the fence body 1;

[0067] The connecting device 3 is used for the movable connection, locking and releasing of multiple fence bodies 1.

[0068] The T-shaped bracket 2 includes: a T-shaped bracket upright plate 201, a first T-shaped bracket upper movable connecting plate 204, a second T-shaped bracket upper movable connecting plate 205, a first T-shaped bracket lower movable connecting plate 208, a second T-shaped bracket lower movable connecting plate 209, a first upper connecting pin 202, a second upper connecting pin 203, a first connecting pin 206, and a second connecting pin 207;

[0069] The upper end of the movable connecting plate 204 on the first T-shaped bracket is hinged to the lower end of the upright plate 201 of the T-shaped bracket via the first upper connecting pin 202.

[0070] The upper end of the movable connecting plate 205 on the second T-shaped bracket is hinged to the lower end of the upright plate 201 of the T-shaped bracket via the second upper connecting pin 203;

[0071] The upper end of the lower movable connecting plate 208 of the first T-shaped bracket is hinged to the lower end of the upper movable connecting plate 204 of the first T-shaped bracket via the first connecting pin 206, and the upper end of the lower movable connecting plate 209 of the second T-shaped bracket is hinged to the lower end of the upper movable connecting plate 205 of the second T-shaped bracket via the second connecting pin 207.

[0072] The lower end of the first T-shaped bracket lower movable connecting plate 208 is hinged to the lower end of the second T-shaped bracket lower movable connecting plate 209 via a third connecting pin 210;

[0073] The movable connecting plate 204 on the first T-shaped bracket, the movable connecting plate 205 on the second T-shaped bracket, the movable connecting plate 208 on the first T-shaped bracket, and the movable connecting plate 209 on the second T-shaped bracket form a foldable linkage mechanism through the first connecting pin 206, the second connecting pin 207, and the third connecting pin 210, so as to realize the pull-down action of the T-shaped bracket 2 and the switching between support / storage state.

[0074] Specifically, the connecting device 3 is vertically inserted into the end of the fence main unit 1 to connect the two fence main units, and the two fence main units are connected with their sides parallel and attached. The top of each fence main unit is provided with a vertical mounting groove with a top opening.

[0075] The connecting device 3 includes: a buckle plate 301, a buckle post 302, a spring guide post 303, a spring 304, a rotary pin 305, and a positioning protrusion 306;

[0076] The locking post 302 protrudes from the left end of the buckle plate 301 on the side facing the fence body 1.

[0077] The spring guide post 303 is fixedly connected to the right end of the buckle plate 301 facing the fence body 1. The spring 304 is sleeved on the outside of the spring guide post 303, and the upper end of the spring 304 abuts against the buckle plate 301 facing the fence body 1.

[0078] The locking post 302 is a cylindrical structure with its axis set in the horizontal direction;

[0079] The rotary pin 305 has a cylindrical structure with its axis set in the vertical direction, and the axis of the locking pin 302 is perpendicular to the axis of the rotary pin 305.

[0080] The rotary pin 305 is used to pass through the middle of the positioning protrusion 306 in the horizontal direction to realize the locking assembly of the connecting device 3 and the two fence main units.

[0081] The positioning protrusion 306 has a through hole in the middle for the rotary pin 305 to pass through;

[0082] The slewing pin 305 restricts the lateral displacement of the connecting device 3 after passing through the hole;

[0083] When the spring guide post 303 is pressed down, the spring guide post 303 drives the spring 304 to compress, and simultaneously drives the locking post 302 to tilt upwards along the vertical direction toward the side of the buckle plate 301, so that the locking post 302 disengages from the horizontal locking hole of the corresponding fence main unit to release the initial locking state.

[0084] The outer wall of the extended portion of the rotary pin 305 is provided with anti-slip texture. When the rotary pin 305 passes through the through hole of the positioning protrusion 306, the anti-slip texture can enhance the friction and prevent the rotary pin 305 from loosening due to vibration during use of the connecting device 3.

[0085] The through-hole positioning of the rotary pin 305 can directly fix the relative position of the connecting device 3 and the two fence main units, ensuring that the two fence main units always maintain a parallel and close side position.

[0086] The buckle plate 301 is an integral structure and is fixedly connected to the upper end of the buckle post 302, the upper end of the spring 304 and the upper end of the spring guide post 303 to ensure the structural stability of each component of the connecting device 3.

[0087] The fence body 1 has longitudinal grooves on both sides for accommodating the T-shaped bracket 2; when the T-shaped bracket 2 is in the retracted state, the outer surface of the T-shaped bracket 2 is flush with the outer surface of the fence body 1.

[0088] The connecting device 3 is provided on at least one side of the fence body 1, and the connecting device 3 enables a detachable connection with another adjacent fence body 1.

[0089] When the two fence main units are connected, pressing the spring guide post 303 compresses the spring 304, which simultaneously drives the locking post 302 to tilt towards the side of the buckle plate 301.

[0090] The connecting device 3 is vertically placed into the end of the fence main unit 1, aligned with the mounting grooves at the ends of the two fence main units, until the sides of the two fence main units are completely parallel and fit together, and the buckle plate 301 fits into the mounting groove; the spring guide post 303 is released, and the spring 304 resets and drives the buckle post 302 to vertically engage with the horizontal buckle hole of the corresponding fence main unit, forming a preliminary lock.

[0091] Insert the slewing pin 305 horizontally from front to back into the middle of the positioning protrusion 306 to form a secondary lock, providing double protection for the stable connection state of the parallel fit of the two fence main units.

[0092] To unlock, first pull out the rotary pin 305 horizontally to release the secondary lock, then press the spring guide post 303 to make the locking post 302 disengage from the corresponding fence main unit's locking hole, and finally take out the connecting device 3 vertically upwards to separate the two fence main units.

[0093] Example 2

[0094] This embodiment is the basic configuration for the conventional temporary isolation requirements of pumped storage power stations. The main body of the fence 1 is made of Q235 low carbon steel plate and is bent into shape. The overall dimensions are 1200mm (height) × 800mm (width) × 2mm (plate thickness). The two sides have longitudinal grooves with a depth of 50mm and a width of 30mm (adapted to claim 7). The inner wall of the groove is pasted with a 3mm thick neoprene rubber buffer pad to avoid collision and wear when the T-shaped bracket is stored. The end is welded with a 5mm thick steel plate connecting base and has a vertical hinge hole adapted to the rotary pin shaft. At the same time, the end of the fence main body 1 has a vertical mounting groove with a top opening. The right side has a positioning groove 307 with a horizontal locking hole for use when assembling the connecting device 3 and connecting the two fences.

[0095] The T-shaped bracket 2 adopts a linkage mechanism design. The upright plate 201 of the T-shaped bracket is made of 6061 aluminum alloy plate (300mm×30mm×4mm). The upper movable connecting plate (204, 205) and the lower movable connecting plate (208, 209) are both made of aluminum alloy (upper connecting plate 200mm×25mm×3mm, lower connecting plate 180mm×25mm×3mm). The pins 202, 203, 206, and 207 are made of 304 stainless steel (diameter 8mm, length 40mm). The hinge is achieved through interference fit and the rotation is smooth. When pulled down, it can form a T-shaped support structure perpendicular to the fence body 1. When stored, it can be rotated to be parallel to the upright plate and pushed into the groove on the side of the fence. The outer surface is flush with the fence body 1.

[0096] In the connecting device 3, the buckle plate 301 is a glass fiber reinforced integrated injection molded part (80mm×50mm×10mm), the buckle post 302 is a 304 stainless steel cylinder (diameter 10mm, length 25mm, axis along the horizontal direction), the spring guide post 303 is 304 stainless steel (diameter 8mm, length 40mm), fitted with a 65Mn cylindrical helical spring (diameter 12mm, free length 25mm), and the rotary pin 305 is 304 stainless steel (diameter 12mm, length 70mm, axis along the vertical direction, with a protective outer wall). The positioning protrusion 306 and the buckle plate 301 are integrally formed (8mm×8mm×5mm, with a through hole in the middle). During assembly, the spring 304 is first fitted onto the spring guide post 303, and then the spring guide post 303 and the buckle post 302 are fixed to the buckle plate 301 to form a complete connecting device 3. When connecting two fences, follow the steps: first press the guide post to retract the buckle post, insert it vertically into the connecting device, release the guide post to achieve initial locking, and finally insert the rotary pin to complete the secondary locking. The operation time for a single person is ≤20 seconds. Unlocking is done in reverse, which is convenient and efficient.

[0097] In actual use, the T-shaped bracket 2 can be adapted to outdoor wind speeds ≤5m / s after unfolding. After being stored, the fence can be stacked and transported conveniently. 10-15 pieces can be transported at a time by a power station inspection vehicle to meet the needs of rapid deployment for temporary isolation.

[0098] Example 3

[0099] This embodiment demonstrates the use of a fence in a pumped-storage power station unit maintenance area with a scenario of "slight ground protrusions / indentations." Based on Embodiment 1, the lower movable connecting plate of the T-shaped bracket is optimized to improve adaptability to complex terrain. The core improvement is that the lower movable connecting plates 208 and 209 adopt a "fixed section + telescopic section" structure. The fixed section is made of 6061 aluminum alloy (150mm×25mm×3mm), with a pin hole at the hinge end with the upper movable connecting plate. The telescopic section is also made of 6061 aluminum alloy (50mm×25mm×3mm), inserted into the fixed section (overlapping 30mm), with three 10mm-spaced adjustment holes (5mm diameter) on the side. The length is locked (adjustable range 0-30mm) by M5×10 hexagonal socket head cap screws passing through the positioning holes of the fixed section and the adjustment holes of the telescopic section.

[0100] Meanwhile, a 5mm thick nitrile rubber anti-slip pad (25mm×25mm) with a friction coefficient ≥0.6 is attached to the end of the lower movable connecting plate to enhance grip.

[0101] When in use, in the pump turbine maintenance area of ​​the pumped storage power station (where the ground depression is ≤20mm), the lower connecting plate extension length can be adjusted by hand by tightening the locking bolts without tools, so that the ends of the four connecting plates of the T-shaped bracket are all in contact with the ground. The support stability is improved by 40% compared with Example 1. A single person can complete the adjustment within 30 seconds, which meets the needs of rapid deployment for temporary maintenance.

[0102] Example 4

[0103] This embodiment demonstrates the application of fencing in scenarios with high personnel traffic at pumped-storage power stations (such as around the central control room). An anti-accidental-touch design is added to the connecting device 3 to prevent unauthorized personnel from accidentally unlocking it. Specifically, a 15mm diameter circular anti-accidental-touch button made of PA66 material is added to the top of the spring guide post 303. A 5mm gap is reserved between the lower surface of the button and the upper surface of the buckle plate 301. Two anti-slip grooves (1mm deep) are provided on the side. A pressing force of ≥5N is required to compress the spring 304, which facilitates operation by maintenance personnel and reduces the probability of unintentional triggering. The outer surface of the buckle post 302 is knurled with a module of 0.5, reducing the mating gap after insertion into adjacent fence buckle holes from 0.5mm to 0.2mm to prevent loosening due to minor collisions.

[0104] Meanwhile, connecting devices 3 are installed on both sides of the main body 1 of the fence, which can be spliced ​​in multiple directions to form a rectangular isolation area; the T-shaped bracket 2 has the same structure as in embodiment 1, providing stable support when unfolded, and not affecting the stacking and transportation of the fence when stored. In actual use, the anti-accidental touch button can effectively prevent inspection personnel from accidentally touching the unlocking mechanism, and the knurled locking post increases the pull-out resistance of the fence after splicing from 100N to 180N, meeting the needs of personnel for slight leaning, and the anti-accidental touch button can be pressed smoothly to unlock the fence during normal disassembly without affecting the ease of operation.

[0105] Example 5

[0106] This embodiment is a design for the enclosure scene during the stator maintenance of Unit 1 of a pumped storage power station. The basic portable fence unit of Embodiment 1 is connected end to end to form a fence system.

[0107] The specific configuration is as follows: 12 basic fence units are selected, and each unit is spliced ​​end to end through the end connecting device 3 according to the operation steps to form a rectangular enclosure area with a size of 6m×4m (covering the operating space required for stator maintenance); to improve the warning effect, two 50mm wide reflective strips are pasted on the surface of each fence body 1 (one 100mm from the top and one 200mm from the bottom), and the reflective strips comply with GB / T18833-2012 standard; at the same time, an extension bracket with a warning light is added at each of the two diagonal positions of the rectangular enclosure area (it can be detachably connected to the fence body 1 through the connecting device 3, and the warning light is a 12V DC LED light with a battery life of ≥8 hours).

[0108] During assembly, the location of each fence unit is first determined according to the boundary of the maintenance area. One maintenance personnel and one assistant personnel work together to complete the splicing of the first and last units by pressing the connecting device 3. The entire system can be installed within 20 minutes. During use, the T-shaped bracket 2 unfolds to provide stable support without relying on the ground pre-embedded structure. After maintenance, the operation is carried out in the order of "T-shaped bracket storage → unlocking the connecting device → separating the fence unit → stacking and transporting". The volume of a single unit after folding is only 1 / 3 of the unfolded state, which is convenient for centralized transportation to the warehouse for storage.

[0109] 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 kind of on-site fast-assembly fence unit, Characterized in that, It includes: Single block fence body (1), T-shaped support (2) that can be movably stored in the side of the fence body (1), and press type connecting device (3) arranged at the end of the fence body (1); The T-shaped support (2) is movably connected with the fence body (1), and has an unfolded supporting state and a folded storage state; In the supporting state, the T-shaped support (2) is perpendicular to the fence body (1) to provide support; In the storage state, the T-shaped support (2) is pulled down and rotated to a position parallel to the side of the fence body (1), and is stored in the side of the fence body (1); The connecting device (3) is used for the movable connection, locking and release between multiple fence body (1).

2. According to claim 1, a kind of on-site fast-assembly fence unit, Characterized in that, The T-shaped support (2) includes: T-shaped support vertical plate (201), first T-shaped support upper movable connecting plate (204), second T-shaped support upper movable connecting plate (205), first T-shaped support lower movable connecting plate (208), second T-shaped support lower movable connecting plate (209), first upper connecting pin shaft (202), second upper connecting pin shaft (203), first connecting pin shaft (206) and second connecting pin shaft (207); The upper end of the first T-shaped support upper movable connecting plate (204) is hinged to the lower end of the T-shaped support vertical plate (201) through the first upper connecting pin shaft (202); The upper end of the second T-shaped support upper movable connecting plate (205) is hinged to the lower end of the T-shaped support vertical plate (201) through the second upper connecting pin shaft (203); The upper end of the first T-shaped support lower movable connecting plate (208) is hinged to the lower end of the first T-shaped support upper movable connecting plate (204) through the first connecting pin shaft (206), and the upper end of the second T-shaped support lower movable connecting plate (209) is hinged to the lower end of the second T-shaped support upper movable connecting plate (205) through the second connecting pin shaft (207); The lower end of the first T-shaped support lower movable connecting plate (208) is hinged to the lower end of the second T-shaped support lower movable connecting plate (209) through the third connecting pin shaft (210); The first T-shaped support upper movable connecting plate (204), the second T-shaped support upper movable connecting plate (205), the first T-shaped support lower movable connecting plate (208) and the second T-shaped support lower movable connecting plate (209) form a foldable connecting rod mechanism through the first connecting pin shaft (206), the second connecting pin shaft (207) and the third connecting pin shaft (210), to realize the pulling action of the T-shaped support (2) and the support / storage state conversion.

3. According to claim 1, a kind of on-site fast-assembly fence unit, Characterized in that, The connecting device (3) is vertically placed into the end of the fence body unit (1) to connect two fence body units, and makes the side edges of the two fence body units parallel after connection. The top of the two fence body units is provided with a vertical installation slot with a top opening. The connecting device (3) comprises a buckle plate (301), a buckle column (302), a spring guide column (303), a spring (304), a rotary pin shaft (305) and a positioning protrusion (306); The buckle column (302) is protruded on the left end of the side of the buckle plate (301) facing the fence body (1), The spring guide column (303) is fixedly connected with the right end of the side of the buckle plate (301) facing the fence body (1), the spring (304) is sleeved outside the spring guide column (303), and the upper end of the spring (304) abuts against the side of the buckle plate (301) facing the fence body (1); The positioning protrusion (306) is protruded on the middle part of the buckle plate (301); The right side of the fence body (1) is provided with a positioning groove (307), and a horizontal buckle hole is formed in the positioning groove (307) for vertically clamping the buckle column (302).

4. The on-site fast-assembly fence unit according to claim 3, Characterized in that, The buckle column (302) is a cylindrical structure, and the axis thereof is arranged in a horizontal direction; The rotary pin shaft (305) is a cylindrical structure, and the axis thereof is arranged in a vertical direction, and the axis of the buckle column (302) is perpendicular to the axis of the rotary pin shaft (305); The rotary pin shaft (305) is used for penetrating through the middle part of the positioning protrusion (306) in a horizontal direction, so as to realize the locking assembly of the connecting device (3) and two fence body units; The middle part of the positioning protrusion (306) is provided with a perforation adapted to the penetration of the rotary pin shaft (305); After the rotary pin shaft (305) penetrates through the perforation, the transverse displacement of the connecting device (3) is limited; When the spring guide column (303) is pressed downward, the spring guide column (303) drives the spring (304) to be compressed, synchronously drives the buckle column (302) to be tilted upward in a vertical direction to the side of the buckle plate (301), and makes the buckle column (302) separate from the horizontal buckle hole of the corresponding fence body unit, so as to release the preliminary locking state.

5. The on-site fast-assembly fence unit according to claim 4, Characterized in that, The outer wall of the protruding part of the rotary pin shaft (305) is provided with an anti-skid pattern, when the rotary pin shaft (305) penetrates through the perforation of the positioning protrusion (306), the anti-skid pattern can enhance the friction force, so as to avoid the loosening of the rotary pin shaft (305) due to vibration in the use process of the connecting device (3); Through the penetration positioning of the rotary pin shaft (305), the relative positions of the connecting device (3) and the two fence body units can be directly fixed, so as to ensure that the two fence body units always maintain the state of parallel and close-fitting side edges.

6. The on-site fast-assembly fence unit according to claim 3, Characterized in that, The buckle plate (301) is an integral structure, and is fixedly connected with the upper end of the buckle column (302), the upper end of the spring (304) and the upper end of the spring guide column (303), so as to ensure the structural stability of the connecting device (3).

7. The on-site fast-assembly fence unit according to claim 1, Characterized in that, The two side faces of the fence body (1) are provided with longitudinal grooves for accommodating the T-shaped supports (2); when the T-shaped supports (2) are in the storage state, the outer surfaces of the T-shaped supports (2) are flush with the outer side faces of the fence body (1).

8. The field fast-assembly fence unit according to claim 1, characterized in that At least one side of the fence body (1) is provided with the connecting device (3) for detachable connection with another fence body (1) adjacent thereto.

9. A fence system, characterized in that The fence system is composed of a plurality of field fast-assembly fence units according to any one of claims 1-8.

10. A field fast-assembly fence method, The use method of the field fast-assembly fence unit and system according to any one of claims 1-9, characterized in that The method comprises the following steps: S1: fence connecting step: press the spring guide column (303) of the connecting device (3) to make the clamping column (302) retract to one side of the buckle plate (301) in the vertical direction; Put the connecting device (3) into the mounting groove at the end of the two fence body units in alignment until the side edges of the two fence body units are completely parallel and fit, and the positioning protrusion (306) below the buckle plate (301) is adapted to the end mounting groove of one of the fence body units; Loosen the spring guide column (303), and the spring (304) resets to drive the clamping column (302) to vertically clamp into the horizontal clamping hole of the positioning groove (307) of the corresponding fence body unit, forming preliminary locking; Insert the rotary pin shaft (305) into the perforation of the positioning protrusion (306) from front to back in the horizontal direction to form secondary locking, completing the connection of the two fence body units; if multiple fence body units need to be connected, repeat the above operation; S2: T-shaped support unfolding step: take out the T-shaped support (2) from the longitudinal groove on the side face of the fence body (1), and pull down the first T-shaped support upper movable web (204), the second T-shaped support upper movable web (205), the first T-shaped support lower movable web (208), and the second T-shaped support lower movable web (209) in the direction away from the T-shaped support upright plate (201), so that each movable web rotates around the corresponding pin shaft to be perpendicular to the T-shaped support upright plate (201), forming a T-shaped support structure; S3: T-shaped support storage step: pull down each movable web of the T-shaped support (2) to rotate around the corresponding pin shaft to be parallel to the T-shaped support upright plate (201), and then push the T-shaped support (2) into the longitudinal groove on the side face of the fence body (1) as a whole, completing the storage.

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