A lifting fence for orifice isolation

Abstract

A lifting fence for orifice isolation, comprising a base member, a sector fence and a fence door; the sector fence is composed of an upper horizontal transverse plate, a fence belt locking vertical rod, a fence vertical rod, a lower horizontal connecting plate and a handle; the upper horizontal transverse plate and the lower horizontal connecting plate are arranged in parallel and are spaced apart, and the fence belt locking vertical rod and the fence vertical rod are fixedly connected between the two; the handle is installed on the upper horizontal transverse plate through a pin shaft and is used for driving the sector fence and the fence door to be lifted up and down as a whole; the fence door is assembled with the sector fence to form a personnel access channel of the orifice. The sector fence is an integrated welded member capable of being independently lifted, without the need of preparing materials such as pipe materials and connecting pieces on site like a traditional temporary fence, and only a single person can realize lifting operation through the handle; meanwhile, the fence door is assembled with the sector fence, which not only meets the orifice isolation and protection requirements, but also realizes convenient personnel access, greatly reduces the labor and time consumption of fence disassembly and assembly when the orifice cover plate is frequently opened, and can be adapted to orifice protection scenes requiring frequent operation.

Description

Technical Field

[0001] This utility model belongs to the field of orifice safety isolation and protection technology, and specifically relates to a lifting fence for orifice isolation. Background Technology

[0002] In industrial production, building maintenance, and power engineering, openings (such as equipment maintenance holes, cable well holes, and personnel access holes) are crucial for ensuring the normal operation of facilities and personnel work. These openings are typically equipped with covers for normal closure. When equipment maintenance or personnel access is required, the covers must be opened and safety barriers installed to prevent falls and accidents. Currently, the application of safety barriers for openings has the following shortcomings: 1. Existing fences are mostly temporary or fixed structures. Temporary fences require on-site preparation of materials such as pipes and connectors, and both assembly and dismantling consume a lot of manpower and time, making them particularly unsuitable for scenarios where manhole covers are frequently opened and fences need to be repeatedly disassembled and reassembled. Fixed fences, although they do not require repeated assembly, occupy the space around the manhole, affecting normal passage and other maintenance work, and are difficult to align with the foundation surface when the manhole cover is closed, posing a tripping hazard.

[0003] 2. Insufficient human-centered design: due to the lack of consideration for operator safety during the initial and final operation of the device, there is a risk of hand injury during operation.

[0004] Based on the actual pain points in the application of the above-mentioned orifice fences, there is an urgent need to develop an isolation fence that can be independently raised and lowered, is safe and convenient to operate, can ensure the flatness of the base surface, and is adaptable to various orifice shapes, so as to meet the safety protection needs in scenarios where orifice covers are frequently opened and closed, while taking into account both work efficiency and environmental safety. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a lifting fence for orifice isolation. The fan-shaped fence of this utility model is an integrated welded component that can be lifted independently. Unlike traditional temporary fences, it does not require the preparation of pipes, connectors and other materials on site. The lifting operation can be achieved by a single person using only the handle. At the same time, the fence gate and the fan-shaped fence are compatible and assembled, which not only meets the orifice isolation and protection requirements, but also allows for convenient personnel access. It greatly reduces the manpower and time consumption of fence disassembly and assembly when the orifice cover is frequently opened, and can be adapted to orifice protection scenarios that require frequent operation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A lifting fence for isolating orifices includes a slatted fence and a fence gate; the slatted fence consists of an upper horizontal plate, a fence post with a lock, a fence post, a lower horizontal connecting plate, and a handle; The upper horizontal plate and the lower horizontal connecting plate are parallel and spaced apart, and the two are fixedly connected to the fence with locking posts and fence posts; The handle is installed on the upper horizontal plate via a pin and is used to drive the entire fan-shaped fence to move up and down. The fence gate and the slatted fence are fitted and assembled to form an access passage for personnel. The basic component is installed on the inner wall of the opening, and the fan-shaped fence and fence gate are located inside the basic component and can be raised and lowered.

[0007] Preferably, the upper horizontal plate has three installation and welding clearance holes and one handle installation rectangular clearance hole; the three installation and welding clearance holes correspond to the installation and welding of two fence posts with locks and one fence post, respectively, and are used to avoid welding operations; the two handle installation rectangular clearance holes are adapted to the pin installation of the handle, so that the handle can rotate around the pin.

[0008] Preferably, the fence with locking uprights is a hollow column structure, with an unlocking connecting rod clearance groove on the upper side wall for the unlocking component to move; a U-shaped unlocking plate clearance groove on the lower side wall, and a lower horizontal connecting plate mounting hole at the bottom, which is fixedly connected to the lower horizontal connecting plate by bolts to achieve a stable assembly with the lower horizontal connecting plate.

[0009] Preferably, the fence post is a solid column structure, with the upper end fixedly connected to the upper horizontal plate by welding to ensure connection strength; the lower end has a mounting hole and can be detachably connected to the lower horizontal connecting plate by bolts.

[0010] Preferably, the handle is a semi-ring metal structure, made by one-piece molding process; the handle has a pin hole in the middle, which is adapted to the rectangular clearance hole for the handle of the upper horizontal plate; in the natural state, the handle fits against the surface of the upper horizontal plate under its own weight; when pulled, it can unfold around the pin for the hand to grip and apply force.

[0011] Preferably, the fence gate includes a frame body and a movable gate; the movable gate is mounted on a locking post of the fence and can rotate around it to realize the opening and closing operation; The movable door includes an upper horizontal plate, a central upright post, a reinforcing rib, an end lock, and a central lock. One end of the upper horizontal plate is rotatably connected to the end horizontal plate, and the middle is fixedly connected to the upper end of the central upright post. The central upright post is hollow, with a locking clearance slot at the upper end and a connection through the reinforcing rib at the lower end. The reinforcing rib is fixed below the movable door to enhance its structural strength. The end lock is installed at one end of the reinforcing rib. The movable door is mounted on the locking upright post and can rotate around the post to open and close.

[0012] Preferably, the main frame includes an upper horizontal plate at the end, a reinforcing rib plate for the fence gate frame, a central upright post for the fence gate frame, a locking upright post for the fence, and a lower horizontal connecting plate; the upper horizontal plate at the end is adapted and fixedly connected to the locking upright post for the fence; the reinforcing rib plate for the fence gate frame is fixed between the two locking upright posts for the fence, and its specific height is adapted to the height of the movable door, and its end position is provided with a stepped locking hole adapted to the locking of the end of the movable door; when the movable door is closed, the locking at the end of the movable door is adapted and engaged with the reinforcing rib plate for the fence gate frame, and the locking in the middle of the movable door is adapted and engaged with the central upright post for the fence gate frame, together realizing the locking of the movable door.

[0013] Preferably, the fan-shaped fence and the fence gate further include a kick plate drive rod; the kick plate drive rod is a strip-shaped metal rod, welded to the outer wall of the fence with lock post and the fence post; the welding height is 180mm from the ground when the fan-shaped fence is fully open.

[0014] Preferably, the fan-shaped fence and fence gate are designed to fit the shape of the opening; when the opening is square, the fan-shaped fence and fence gate are rectangular fan-shaped structures; when the opening is round or polygonal, the fan-shaped fence and fence gate are designed as arc-shaped or polygonal fan-shaped structures to ensure a fit and fit with the edge of the opening.

[0015] Preferably, the fence panels and the fence gate have locking posts or the posts have reserved external driving force interfaces; the external driving force interfaces can be adapted to connect to a hydraulic drive mechanism or a motor drive mechanism to drive the fence panels and the fence gate to automatically lift and lower.

[0016] Preferably, the foundation component includes an upper support and a lower support; the upper support is installed on the borehole foundation by fasteners, and the lower support is installed at a suitable height inside the borehole foundation.

[0017] The present invention can achieve the following beneficial effects: The fan-shaped fence of this utility model is an integrated welded component that can be independently raised and lowered. Unlike traditional temporary fences, it does not require the preparation of pipes, connectors and other materials on site. The raising and lowering operation can be achieved by a single person using only the handle. At the same time, the fence gate and the fan-shaped fence are compatible and assembled, which not only meets the needs of orifice isolation and protection, but also allows personnel to enter and exit easily. It greatly reduces the manpower and time consumption of fence disassembly and assembly when the orifice cover is frequently opened, and can be adapted to orifice protection scenarios that require frequent operation.

[0018] The fan-shaped fence has a locking post or a pre-reserved external drive interface at the top of the post, which can be adapted to a hydraulic drive mechanism or a motor drive mechanism to realize automatic lifting and lowering of the fan-shaped fence. It is suitable for scenarios with large opening size, heavy fence weight or high frequency of lifting and lowering. Moreover, the interface design does not affect the manual lifting function, and it can still be operated manually when there is no external power. The two operation modes can be flexibly switched to meet the opening protection needs under different working conditions. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural diagram of the fan-shaped fence of this utility model. Figure 3 This is a structural diagram of the fan-shaped fence of this utility model; Figure 4 This is a structural diagram of the fence gate of this utility model when it is open; Figure 5 This is a diagram showing the closed structure of the fence gate of this utility model; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a diagram of the locking structure in the movable door of this utility model. Figure 8 This is a structural diagram of the locking mechanism in the movable door of this utility model. Figure 9 This is an application diagram of the present utility model.

[0020] In the diagram: 0. Orifice foundation, 1. Upper bracket, 2. Lower bracket, 4. Fan-shaped fence, 41. Upper horizontal plate, 41-1. Installation welding clearance hole, 41-2. Rectangular clearance hole for handle installation, 42. Fence with lockable upright, 42. Unlocking connecting rod clearance slot, 42-1. Unlocking plate clearance slot, 42-2. Mounting hole, 42-3. Fence upright, 43. Mounting hole, 43-1. Lower horizontal connecting plate, 44. Handle, 45.

[0021] 6-Fence gate; 6-A-Frame main body; 6-B-Moving gate; 61-Horizontal plate on the end; 62-Horizontal plate on the top of the moving gate; 63-Central upright of the fence gate; 64-Reinforcing rib plate of the moving gate; 65-End lock of the moving gate; 66-Reinforcing rib plate of the fence gate frame; 67-Central upright of the fence gate frame; 68-Central lock of the moving gate; Kickboard drive rod 70. Detailed Implementation

[0022] Preferred solutions include Figures 1 to 9 As shown, a lifting fence for isolating openings includes a fan-shaped fence 4 and a fence gate 6; the fan-shaped fence 4 is composed of an upper horizontal plate 41, a fence with locking uprights 42, a fence uprights 43, a lower horizontal connecting plate 44, and a handle 45. The upper horizontal plate 41 and the lower horizontal connecting plate 44 are parallel and spaced apart, and the two are fixedly connected to the fence lockable upright 42 and the fence upright 43. The handle 45 is installed on the upper horizontal plate 41 via a pin and is used to drive the fan-shaped fence 4 to move up and down as a whole. The fence gate 6 and the fan-shaped fence 4 are adapted and assembled to form an opening for personnel to enter and exit. The basic component is installed on the inner wall of the opening, and the fan-shaped fence 4 and the fence gate 6 are located inside the basic component and can be raised and lowered.

[0023] The fan-shaped fence 4 is a lifting protective body. It forms a frame structure with the upper horizontal plate 41 and the lower horizontal connecting plate 44 and the uprights. The handle 45 provides the lifting driving force. The fence gate 6 is compatible with the fan-shaped fence 4, which can not destroy the integrity of the isolation and meet the needs of personnel passage.

[0024] Furthermore, the upper horizontal plate 41 is provided with installation and welding clearance holes 41-1 and handle installation rectangular clearance holes 41-2; there are 3 installation and welding clearance holes 41-1, which correspond to the installation and welding of 2 fence posts with locks 42 and 1 fence post 43, respectively, and are used to avoid welding operations; there are 2 handle installation rectangular clearance holes 41-2, which are adapted to the pin installation of the handle 45, so that the handle 45 can rotate around the pin.

[0025] Installing welding clearance holes 41-1 avoids interference between the welding torch and the horizontal plate during welding, ensuring a firm weld between the upright and the horizontal plate; installing rectangular clearance holes 41-2 on the handle provides rotation space for the handle 45 without taking up extra space.

[0026] Furthermore, the fence with locking upright 42 is a hollow column structure, with an unlocking connecting rod avoidance groove 42-1 on its upper side wall for the unlocking component to move; a U-shaped unlocking plate avoidance groove 42-2 is provided on the lower side wall, and a lower horizontal connecting plate mounting hole 42-3 is provided at the bottom, which is fixedly connected to the lower horizontal connecting plate 44 by bolts to achieve a stable assembly with the lower horizontal connecting plate 44.

[0027] The hollow structure of the locking post 42 of the fence is used to accommodate unlocking components such as unlocking rods and unlocking plates. The unlocking rod avoids the slot 42-1 and the U-shaped unlocking plate avoids the slot 42-2 to provide space for the movement and rotation of the unlocking components, ensuring smooth unlocking action. The bottom mounting hole is connected to the lower horizontal connecting plate 44 by bolts, which takes into account both connection strength and convenience of later maintenance.

[0028] Furthermore, the fence post 43 is a solid column structure, with its upper end fixedly connected to the upper horizontal plate 41 by welding to ensure connection strength; the lower end has a mounting hole 43-1, which can be detachably connected to the lower horizontal connecting plate 44 by bolts.

[0029] The solid structure of the fence post 43 enhances the load-bearing capacity and resistance to deformation, adapting to the force requirements of the fan-shaped fence 4 during lifting and lowering; the upper end is welded and fixed to ensure the reliability of the connection with the upper horizontal plate 41, and the lower end is bolted for detachable connection, making it easy to replace the post individually when it is damaged without disassembling the entire fan-shaped fence 4.

[0030] Furthermore, the handle 45 is a semi-ring metal structure, manufactured using an integral molding process; the handle 45 has a pin hole in the middle, which is adapted to the handle mounting rectangular clearance hole 41-2 of the upper horizontal plate 41; in its natural state, the handle 45 fits against the surface of the upper horizontal plate 41 under its own weight; when pulled, it can unfold around the pin, allowing the hand to grip and apply force.

[0031] The handle is made of one piece without welding joints, which improves the overall strength of the handle; the semi-circular structure fits the curvature of the hand; it fits the surface of the horizontal plate in its natural state to avoid protrusion and jamming, and can be flexibly unfolded when lifted, so that a single person can drive the fan-shaped fence 4 to rise and fall.

[0032] Furthermore, the fence gate 6 includes a frame body 6-A and a movable gate 6-B; the movable gate 6-B is mounted on the fence with a locking upright 42 and can rotate around it to realize the opening and closing operation; The movable door 6-B includes an upper horizontal plate 62, a central upright post 63, a reinforcing rib 64, an end lock 65, and a central lock 68. One end of the upper horizontal plate 62 is rotatably connected to the end upper horizontal plate 61, and the middle part is fixedly connected to the upper end of the central upright post 63. The central upright post 63 is hollow, with a locking clearance slot 63-1 at the upper end and a connection through the reinforcing rib 64 at the lower end. The reinforcing rib 64 is fixed below the movable door 6-B to enhance its structural strength. The end lock 65 is installed at one end of the reinforcing rib 64. The movable door 6-B is mounted on the locking upright post 42 and can rotate around the locking upright post 42 to open and close.

[0033] The main frame 6-A provides the installation base for the movable door 6-B. The movable door 6-B rotates around the locking upright 42 of the fence to realize opening and closing. The horizontal plate 62 on the upper part of the movable door and the upright 63 of the fence door form the frame of the movable door. The hollow upright 63 of the fence door and the locking clearance slot 63-1 are adapted to the action of the locking 68 in the movable door. The reinforcing rib 64 of the movable door enhances the structural strength of the movable door. The end lock 65 of the movable door ensures that the end of the movable door is fixed when it is closed.

[0034] Furthermore, the main frame 6-A includes an upper horizontal plate 61 at the end, a fence gate frame reinforcing rib plate 66, a fence gate frame central upright post 67, a fence lockable upright post 42, and a lower horizontal connecting plate 44; the upper horizontal plate 61 at the end is adapted and fixedly connected to the fence lockable upright post 42; the fence gate frame reinforcing rib plate 66 is fixed between the two fence lockable upright posts 42, and its specific height is adapted to the height of the movable door 6-B, and its end position is provided with a stepped locking hole 66-1 adapted to the movable door end lock 65; when the movable door 6-B is closed, the movable door end lock 65 is adapted and engaged with the fence gate frame reinforcing rib plate 66, and the movable door central lock 68 is adapted and engaged with the fence gate frame central upright post 67, together realizing the locking of the movable door 6-B.

[0035] The horizontal plate 61 at the end is fixed to the fence with locking upright 42 to form the top support of the frame; the stepped locking hole 66-1 of the fence gate frame reinforcing rib plate 66 is engaged with the end lock 65 of the movable door, and the upright 67 in the fence gate frame is engaged with the middle lock 68 of the movable door. The double locking structure ensures that the movable door 6-B will not be opened accidentally after it is closed, thus improving the safety of protection.

[0036] Furthermore, the fan-shaped fence 4 and the fence gate 6 also include a kick plate drive rod 70; the kick plate drive rod 70 is a strip-shaped metal rod, welded to the outer wall of the fence with lock post 42 and fence post 43; the welding height is 180mm from the ground when the fan-shaped fence 4 is fully open.

[0037] The kick plate drive rod 70 is a strip-shaped metal rod that is welded to the upright and moves synchronously with the lifting and lowering of the fan-shaped fence 4 and the fence gate 6. The 180mm welding height ensures that when the fan-shaped fence 4 is fully open, the drive rod can drive the hidden kick plate at the opening to extend to the normal protection height, forming bottom protection at the opening and preventing tools from falling into the opening.

[0038] Furthermore, the fan-shaped fence 4 and fence gate 6 are designed to fit the shape of the opening; when the opening is square, the fan-shaped fence 4 and fence gate 6 are rectangular fan-shaped structures; when the opening is round or polygonal, the fan-shaped fence 4 and fence gate 6 are designed as arc-shaped or polygonal fan-shaped structures to ensure that they fit and conform to the edge of the opening.

[0039] The fan-shaped design of the fan-shaped fence 4 and the fence gate 6 allows them to cover different openings such as square, round, and polygonal, eliminating the need to redesign the overall structure for specific openings and improving the versatility of the device. At the same time, the fit with the edge of the opening can avoid protective gaps.

[0040] Furthermore, the fence panel fence 4 and the fence gate 6 have a reserved external driving force interface on the fence locking post 42 or fence post 43; the external driving force interface can be adapted to connect a hydraulic drive mechanism or a motor drive mechanism to drive the fence panel fence 4 and the fence gate 6 to automatically rise and fall.

[0041] An external drive force interface is reserved at the top of the pole, which can be adapted to hydraulic or electric drive mechanisms to realize the automatic lifting and lowering of the fan-shaped fence 4 and the fence gate 6. It is suitable for scenarios with large opening size, heavy fence weight or frequent lifting and lowering. Moreover, the interface design does not affect the manual operation of the handle 45. The two drive methods can be flexibly switched to adapt to different working conditions.

[0042] Furthermore, the basic components include an upper support 1 and a lower support 2; the upper support 1 is installed on the borehole foundation 0 by fasteners, and the lower support 2 is installed at a suitable height inside the borehole foundation 0.

[0043] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A lifting fence for isolating openings, characterized in that: It includes basic components, fan-shaped fence (4) and fence gate (6); the fan-shaped fence (4) consists of an upper horizontal horizontal plate (41), a fence with lockable upright (42), a fence upright (43), a lower horizontal connecting plate (44) and a handle (45); The upper horizontal plate (41) and the lower horizontal connecting plate (44) are parallel and spaced apart, and the two are fixedly connected to the fence with locking post (42) and fence post (43). The handle (45) is installed on the upper horizontal plate (41) by a pin and is used to drive the fan-shaped fence (4) to move up and down as a whole; The fence gate (6) and the fan-shaped fence (4) are adapted and assembled to form an access passage for personnel to enter and exit; The basic component is installed on the inner wall of the opening, and the fan-shaped fence (4) and the fence gate (6) are located inside the basic component and can be raised and lowered.

2. A lifting fence for isolating openings according to claim 1, characterized in that: The upper horizontal plate (41) is provided with installation welding clearance holes (41-1) and handle installation rectangular clearance holes (41-2); there are 3 installation welding clearance holes (41-1), which correspond to the installation welding of 2 fence lockable uprights (42) and 1 fence upright (43) respectively, and are used to avoid welding operations; there are 2 handle installation rectangular clearance holes (41-2), which are adapted to the pin installation of the handle (45) so that the handle (45) can rotate around the pin.

3. A lifting fence for isolating openings according to claim 1, characterized in that: The fence with locking upright (42) is a hollow column structure. The upper side wall is provided with an unlocking connecting rod clearance groove (42-1) for the unlocking component to move. The lower side wall is provided with a U-shaped unlocking plate clearance groove (42-2) and the bottom is provided with a lower horizontal connecting plate mounting hole (42-3). It is fixedly connected to the lower horizontal connecting plate (44) by bolts to achieve a stable assembly with the lower horizontal connecting plate (44).

4. A lifting fence for isolating openings according to claim 1, characterized in that: The fence post (43) is a solid column structure. The upper end is fixedly connected to the upper horizontal plate (41) by welding to ensure the connection strength. The lower end is provided with an installation hole (43-1) and can be detachably connected to the lower horizontal connecting plate (44) by bolts.

5. A lifting fence for isolating openings according to claim 1, characterized in that: The handle (45) is a semi-ring metal structure and is made by one-piece molding process; the handle (45) has a pin hole in the middle, which is adapted to the handle mounting rectangular clearance hole (41-2) of the upper horizontal plate (41); in the natural state, the handle (45) fits against the surface of the upper horizontal plate (41) under its own weight; when pulled, it can be unfolded around the pin for the hand to grip and apply force.

6. A lifting fence for isolating openings according to claim 1, characterized in that: The fence gate (6) includes a frame body (6-A) and a movable gate (6-B); the movable gate (6-B) is mounted on the fence with a locking post (42) and can rotate around it to realize the opening and closing operation; The movable door (6-B) includes an upper horizontal plate (62), a central upright post (63), a reinforcing rib (64), an end lock (65), and a central lock (68). One end of the upper horizontal plate (62) is rotatably connected to the end upper horizontal plate (61), and the middle part is fixedly connected to the upper end of the central upright post (63). The central upright post (63) is hollow, with a locking clearance groove (63-1) at the upper end and the lower end passing through the reinforcing rib (64). The reinforcing rib (64) is fixed below the movable door (6-B) to enhance the structural strength of the movable door (6-B). The end lock (65) is installed at one end of the reinforcing rib (64). The movable door (6-B) is mounted on the locking upright post (42) of the fence and can rotate around the locking upright post (42) to open and close.

7. A lifting fence for isolating openings according to claim 6, characterized in that: The main frame (6-A) includes an upper horizontal plate (61) at the end, a reinforcing rib plate (66) for the fence gate frame, a central upright post (67) for the fence gate frame, a locking upright post (42) for the fence, and a lower horizontal connecting plate (44). The upper horizontal plate (61) at the end is adapted to and fixedly connected to the locking upright post (42) for the fence. The reinforcing rib plate (66) for the fence gate frame is fixed between the two locking upright posts (42) for the fence. Its specific height is adapted to the height of the movable door (6-B). Its end position is provided with a stepped locking hole (66-1) adapted to the end lock (65) of the movable door. When the movable door (6-B) is closed, the end lock (65) of the movable door is adapted to and engaged with the reinforcing rib plate (66) for the fence gate frame, and the central lock (68) of the movable door is adapted to and engaged with the central upright post (67) for the fence gate frame, so as to lock the movable door (6-B).

8. A lifting fence for isolating openings according to claim 1, characterized in that: The fan-shaped fence (4) and the fence gate (6) also include a kick plate drive rod (70); the kick plate drive rod (70) is a strip-shaped metal rod, welded to the outer wall of the fence with lock post (42) and fence post (43); the welding height is 180mm from the ground when the fan-shaped fence (4) is fully open.

9. A lifting fence for isolating openings according to claim 1, characterized in that: The fan-shaped fence (4) and fence gate (6) are designed to fit the shape of the opening. When the opening is square, the fan-shaped fence (4) and fence gate (6) are rectangular fan-shaped structures. When the opening is round or polygonal, the fan-shaped fence (4) and fence gate (6) are designed to be arc-shaped or polygonal fan-shaped structures to ensure that they fit and conform to the edge of the opening.

10. A lifting fence for isolating openings according to claim 1, characterized in that: The fence railing (4) and fence gate (6) have a reserved external driving force interface on the fence railing lock post (42) or fence post (43); the external driving force interface can be adapted to connect a hydraulic drive mechanism or a motor drive mechanism to drive the fence railing (4) and fence gate (6) to automatically rise and fall.

11. A lifting fence for isolating openings according to claim 1, characterized in that: The basic components include an upper bracket (1) and a lower bracket (2); the upper bracket (1) is installed on the borehole foundation (0) by fasteners, and the lower bracket (2) is installed at a suitable height inside the borehole foundation (0).

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