Protective fence for pit hole of nuclear power plant

Abstract

The utility model provides a nuclear power plant pit hole protective fence which comprises an inserting part and a fence body, the inserting part is in a sleeve shape, the fence body is vertically arranged at the upper end of the inserting part, and the fence body comprises vertical rods evenly arranged in the circumferential direction of the inserting part; wherein reinforcing ribs are arranged between the adjacent vertical rods, and at least one reinforcing rib is connected with the corresponding vertical rod through a locking piece. The inserting part is inserted around the hole opening of the pit hole, so that the whole protective fence is designed to be cylindrical, and the edge of the pit hole can be tightly and effectively protected. By means of the protective fence, a worker can deeply observe the interior of an underground well pit from the position above the well pit through the protective fence before entering the underground well pit, the site condition of the well pit is fully known, and the safety of entering of the worker is guaranteed. After a person enters an underground well pit, according to the field operation condition, when tools such as an aluminum ladder and a long-rod wrench need to be sent into or sent out of the well pit, the locking piece and the fence can be opened to provide enough space, and the tools such as the aluminum ladder and the long-rod wrench can be sent into or sent out of the well pit.

Description

Technical Field

[0001] This utility model relates to the technical field of pit protection, specifically to a pit protection fence for nuclear power plants. Background Technology

[0002] During routine and major overhaul operations in the nuclear power plant's control area, it is often necessary to open the REN system manhole cover to replace the water filter.

[0003] Because the water filters in the REN (Reactor Cooling and Fire Extinguishing) system of nuclear power plants have been in service for a long time, they have accumulated a high level of radioactivity. Therefore, the water filters need to be replaced regularly. The water filters are placed in underground boreholes 2 meters deep. The manhole cover needs to be opened so that personnel can enter the borehole to replace the filters, confirm that the installation is in place, and apply molybdenum grease to lubricate the bolts.

[0004] The specific replacement procedure is as follows: The manhole cover is lifted, personnel observe the interior of the manhole, and after confirming safety, personnel enter the underground manhole to replace the water filter. After replacement, the site is checked again. Before personnel enter the underground manhole, they need to observe the interior from above to fully understand the situation and ensure personnel safety. After personnel enter the underground manhole, tools such as aluminum ladders and long-handled wrenches need to be lowered or lowered into the manhole, depending on the work situation. Traditional guardrail construction cannot meet these requirements, and the predominantly square fences require a certain distance from the opening, making it difficult to observe the situation inside the manhole from all angles.

[0005] Therefore, it is necessary to design a protective fence for nuclear power plant pits that meets the actual usage requirements for circular protection areas and is easy to install and use. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a protective fence for nuclear power plant pits, which can solve the protection problem around nuclear power plant pits in the prior art.

[0007] To achieve the above and other related objectives, this utility model provides a protective fence for nuclear power plant pits, comprising:

[0008] The insertion part is sleeve-shaped;

[0009] A fence, which is erected on the upper end of the insertion part, and the fence includes uprights evenly arranged in the circumferential direction of the insertion part;

[0010] Among them, a reinforcing rib is provided between adjacent uprights, and at least one of the reinforcing ribs and the corresponding upright are connected by a locking device.

[0011] In one embodiment of the present invention, the insertion part is a stepped sleeve, and the small sleeve of the stepped sleeve is located below the large sleeve, and the small sleeve is provided with holes around its perimeter.

[0012] In one embodiment of this utility model, the small sleeve is a conical sleeve, and the diameter of the upper bottom surface of the small sleeve is larger than the diameter of the lower bottom surface.

[0013] In one embodiment of the present invention, the height of the large sleeve is at least 100 mm, and the thickness of its sleeve wall is at least 1.5 mm.

[0014] In one embodiment of this utility model, each of the uprights and reinforcing ribs is made of titanium alloy, and the uprights and the corresponding reinforcing ribs are welded together by full welding.

[0015] In one embodiment of the present invention, the reinforcing ribs include an upper reinforcing rib, a middle reinforcing rib, and a lower reinforcing rib arranged sequentially along the height direction of the fence, and the upper reinforcing rib is disposed at the top of the corresponding upright.

[0016] In one embodiment of this utility model, the middle reinforcing rib and the lower reinforcing rib are parallel to each other and are arranged adjacent to the upper reinforcing rib, and at least one of the middle reinforcing ribs is connected to the corresponding upright through a locking member.

[0017] In one embodiment of this utility model, the locking component is a cam pin lock, one end of the central reinforcing rib is rotatably connected to the upright through a first mounting plate, the other end of the central reinforcing rib is provided with a second mounting plate corresponding to the upright, and the other end of the central reinforcing rib is connected to the second mounting plate through the cam pin lock.

[0018] In one embodiment of this utility model, the first mounting plate is provided with a damping disc for limiting the rotation angle of the middle reinforcing rib.

[0019] In one embodiment of this utility model, both the first mounting plate and the second mounting plate are inverted U-shaped plates, and the bottom plate of the U-shaped plate is connected to the corresponding pole body.

[0020] The beneficial technical effects of this utility model include at least the following:

[0021] This utility model discloses a protective fence for nuclear power plant pits. The uprights are evenly arranged around the circumference of the insertion joint to form the fence. The insertion joint is inserted around the pit opening, giving the overall protective fence a cylindrical design that effectively protects the pit's edges. Before personnel enter the underground pit, this utility model allows them to observe the pit's interior from above, gaining a full understanding of the site conditions and ensuring personnel safety. After personnel enter the underground pit, depending on the on-site work situation, when it is necessary to send aluminum ladders, long-handled wrenches, or other tools into or out of the pit, the locking mechanism can be opened, providing sufficient space for these tools to be moved in or out.

[0022] The fence of this utility model has a hollow design, which reduces the overall weight of the protective fence while ensuring its strength, and also makes it easy to observe the situation inside the pit.

[0023] The connector of this utility model is a stepped sleeve. The small sleeve of the stepped sleeve is inserted underground to fix the fence. The large sleeve is located above ground, ensuring that it effectively covers the bottom of the protective fence, forming an effective barrier to prevent foreign objects from rolling into the pit from below. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a protective fence for a nuclear power plant pit, according to one embodiment of the present invention.

[0026] Figure 2 for Figure 1 Enlarged view of point A;

[0027] Component labeling: 1-Plug-in part; 11-Small sleeve; 12-Large sleeve; 2-Fence; 21-Upright post; 22-Reinforcing rib; 221-Upper reinforcing rib; 222-Middle reinforcing rib; 223-Lower reinforcing rib; 224-First mounting plate; 225-Second mounting plate; 226-Damping disc; 23-Lock. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0029] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] Please see Figures 1-2 As shown, in order to achieve the above-mentioned objectives and other related objectives, this utility model proposes a protective fence for a nuclear power plant pit, including a plug-in part 1 and a fence 2. The plug-in part 1 is sleeve-shaped, and the fence 2 is erected on the upper end of the plug-in part 1. The fence 2 includes uprights 21 evenly arranged in the circumferential direction of the plug-in part 1. Reinforcing ribs 22 are provided between adjacent uprights 21, and at least one reinforcing rib 22 is connected to the corresponding upright 21 by a locking member 23.

[0031] It should be noted that the uprights 21 of the protective fence are evenly arranged on the circumference of the insertion part 1 to form the fence 2. The insertion part 1 is inserted around the opening of the pit, making the overall protective fence cylindrical in shape, which can tightly and effectively protect the edge of the pit. Moreover, the fence 2 has a hollow design, which reduces the overall weight of the protective fence while ensuring its strength. Before personnel enter the underground pit, they can use the protective fence of this utility model to observe the inside of the pit from above, fully understand the situation on site, and ensure the safety of personnel entering. After personnel enter the underground pit, depending on the on-site work, when it is necessary to send aluminum ladders, long-handled wrenches, and other tools into or out of the pit, the locking part 23 can be opened, and the fence 2 provides sufficient space to allow aluminum ladders, long-handled wrenches, and other tools to be sent into or out of the pit.

[0032] Meanwhile, the plug-in part 1 of this utility model can be inserted around the opening, making the installation of the protective fence more stable and the disassembly and assembly more convenient and quick.

[0033] In one embodiment of the present invention, the insertion part 1 is a stepped sleeve, and the small sleeve 11 of the stepped sleeve is located below the large sleeve 12, and holes are provided around the small sleeve 11.

[0034] It should be noted that the holes around the small sleeve 11 not only reduce weight, but also reduce pressure and save effort when the insertion part 1 is inserted around the opening of the pit. The connection between the small sleeve 11 and the large sleeve 12 is also evenly provided with weight-reducing holes.

[0035] In one embodiment of the present invention, the small sleeve 11 is a conical sleeve, and the diameter of the upper bottom surface of the small sleeve 11 is larger than the diameter of the lower bottom surface.

[0036] It should be noted that when the connector 1 is inserted around the opening of the pit, the small sleeve 11 is inserted underground. The small sleeve 11 is a conical sleeve. This design effectively disperses the pressure and increases the contact area with the surrounding soil or rock. This form helps to increase the friction between the connector 1 and the surrounding environment of the pit, enhancing its stability. The large sleeve 12 is located above ground. The main function of the large sleeve 12 is to form a barrier to prevent smaller objects (such as stones, branches, and garbage) from sliding into the pit, ensuring that the area around the pit remains clean and reducing the occurrence of accidents.

[0037] In one embodiment of the present invention, the height of the large sleeve 12 is at least 100 mm, and the thickness of its sleeve wall is at least 1.5 mm.

[0038] It should be noted that the height and width of the large sleeve 12 are rationally designed to fit the overall structure of the fence 2, ensuring that it effectively covers the bottom of the fence 1 and forms an effective blocking effect. In practical use, the large sleeve 12 can be referred to as a kick plate.

[0039] In one embodiment of the present invention, each upright 21 and reinforcing rib 22 is made of titanium alloy, and the upright 21 and the corresponding reinforcing rib 22 are welded together by full welding.

[0040] It should be noted that the titanium alloy material significantly reduces the weight of the fence while ensuring strength, making it easier for personnel to move. By using full welding to connect the uprights 21 and reinforcing ribs 22 and other components, the strength of the entire structure is significantly enhanced. Thorough polishing ensures a smooth surface, preventing sharp edges from scratching people and reducing the adhesion of contaminants.

[0041] In one embodiment of this utility model, the reinforcing rib 22 includes an upper reinforcing rib 221, a middle reinforcing rib 222, and a lower reinforcing rib 223 arranged sequentially along the height direction of the fence 2, with the upper reinforcing rib 221 disposed at the top of the corresponding upright rib 21. The middle reinforcing rib 222 and the lower reinforcing rib 223 are parallel to each other vertically and are disposed adjacent to the upper reinforcing rib 21, and at least one middle reinforcing rib 222 is connected to the corresponding upright rib 21 by a locking member.

[0042] It should be noted that the upper reinforcing rib 221 is connected to the adjacent upright rib 21, which enables the fence 2 to achieve a certain strength, while the middle reinforcing rib 222 and the lower reinforcing rib 223 further enhance the strength of the fence 2.

[0043] In one embodiment of this utility model, the locking component 23 is a cam-pin lock. One end of the central reinforcing rib 222 is rotatably connected to the upright 21 via a first mounting plate 224. The other end of the central reinforcing rib 222 is provided with a second mounting plate 225 on the upright 21, and the other end of the central reinforcing rib 222 is connected to the second mounting plate 225 via a cam-pin lock. A damping disc 226 is provided on the first mounting plate 224 to limit the rotation angle of the central reinforcing rib 222. Both the first mounting plate 224 and the second mounting plate 225 are inverted U-shaped plates, and the bottom plate of the U-shaped plate is connected to the body of the corresponding upright 21.

[0044] It should be noted that a cam-lock is a common type of mechanical lock. When the lock is operated with a key, knob, or handle, the cam rotates, changing the position of the pin. The angle and direction of rotation determine whether the pin is pushed into the keyhole, thus achieving the locking or unlocking function.

[0045] The damping disc 226 is a component used to mitigate mechanical vibrations and shocks, commonly employed in engineering and mechanical design to improve equipment stability, extend service life, and enhance performance. It works by consuming and dissipating energy through internal friction or resistance, thereby reducing vibration. When energy is consumed and dissipated through internal friction, the friction within the material absorbs the energy generated by motion. When energy is consumed and dissipated through resistance, the restoring force converts some of the energy into heat as the disc deforms during motion, thus reducing the amplitude of system vibration.

[0046] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0047] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0048] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention shown herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0049] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0050] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0051] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0052] The above description of the embodiments shown in this utility model (including the content in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments of the utility model, and such modifications will be within the spirit and scope of the utility model.

[0053] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0054] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A containment pit guard fence for a nuclear power plant, characterized in that The utility model relates to a kind of fence, including: Plug-in part (1), the plug-in part (1) is sleeve-like; Fence (2), the fence (2) is vertically arranged in the upper end of the plug-in part (1), and the fence (2) includes vertical rod (21) evenly arranged in the circumferential direction of the plug-in part (1); Wherein, reinforcing rib (22) is provided between adjacent vertical rod (21), and at least one reinforcing rib (22) and corresponding vertical rod (21) are connected by lock piece (23).

2. The containment pen for a nuclear power plant according to claim 1, characterized in that, The plug-in part (1) is a stepped sleeve, and the small sleeve (11) of the stepped sleeve is located below the large sleeve (12), and a hole is formed around the small sleeve (11).

3. The containment pen for a nuclear power plant according to claim 2, characterized in that, The small sleeve (11) is a conical sleeve, and the upper bottom diameter of the small sleeve (11) is greater than the lower bottom diameter.

4. The containment pen for a nuclear power plant according to claim 3, characterized in that, The height of the large sleeve (12) is at least 100mm, and the sleeve wall thickness is at least 1.5mm.

5. The containment pen for a nuclear power plant according to claim 4, characterized in that, Each vertical rod (21) and each reinforcing rib (22) are made of titanium alloy, and the vertical rod (21) and the corresponding reinforcing rib (22) are welded in full welding form.

6. The containment pen for a nuclear power plant according to claim 5, characterized in that, The reinforcing rib (22) includes upper reinforcing rib (221), middle reinforcing rib (222) and lower reinforcing rib (223) arranged in the height direction of the fence (2) in sequence, and the upper reinforcing rib (221) is arranged at the top end of the corresponding vertical rod (21).

7. The containment pen for a nuclear power plant according to claim 6, characterized in that The middle reinforcing rib (222) and the lower reinforcing rib (223) are parallel and arranged adjacent to the upper reinforcing rib (221), and at least one middle reinforcing rib (222) is connected to the corresponding vertical rod (21) by lock piece (23).

8. The containment pen for a nuclear power plant according to claim 7, characterized in that, The lock piece (23) is a cam latch, one end of the middle reinforcing rib (222) is rotatably connected to the vertical rod (21) by a first mounting plate (224), the other end of the middle reinforcing rib (222) is provided with a second mounting plate (225) corresponding to the vertical rod (21), and the other end of the middle reinforcing rib (222) is connected to the second mounting plate (225) by the cam latch.

9. The containment pen for a nuclear power plant according to claim 8, characterized in that, The first mounting plate (224) is provided with a damping disc (226) for limiting the rotation angle of the middle reinforcing rib (222).

10. The containment pen for a nuclear power plant according to claim 9, characterized in that, The first mounting plate (224) and the second mounting plate (225) are both inverted U-shaped plates, and the bottom plate of the U-shaped plate is connected to the rod body of the corresponding vertical rod (21).

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