Prefabricated trench cover plate

Abstract

The utility model provides a prefabricated trench cover plate. The prefabricated trench cover plate comprises a frame, a grating plate and a screen, the frame is of a square annular structure, an opening in the top of the frame is larger than or equal to the size of the grating plate so that the grating plate can enter the frame, and an opening in the bottom of the frame is smaller than the size of the grating plate so that the grating plate can be supported; the grating plate is made of glass fiber reinforced plastics; the screen mesh is arranged at the bottom opening of the frame, and the size of screen holes of the screen mesh is smaller than that of the ventilation opening of the grating plate, so that animals are prevented from passing through the screen mesh. According to the utility model, the grating plate and the screen mesh are matched for use, and the grating plate is made of glass fiber reinforced plastics, so that the grating plate is convenient to install and maintain, has better anti-corrosion and moisture-proof performance and is not easy to crack; the prefabricated trench cover plate is simple in structure, facilitates observation of line conditions in the trench, can improve the air permeability of the prefabricated trench cover plate, prevents water vapor from being accumulated in the trench, and guarantees the normal work of a cable and a power system.

Description

Technical Field

[0001] The utility model relates to the technical field of cable trench accessories, in particular to a prefabricated trench cover. Background Art

[0002] In the power industry, trenches for laying cables outdoors in substations are usually equipped with trench covers. Most common trench covers on the market are grid templates customized with cement materials. The material is very heavy, and the condition of the lines in the trench cannot be observed. They are not breathable, anti-corrosive and moisture-proof, and are not easy to move, install and adjust the use position. Cement grids are prone to cracking in outdoor environments exposed to wind, sun and rain for a long time. Therefore, trench covers made of this material will cause the lines in the trench to age due to moisture, long-term corrosion, and the entry of harmful small animals, which will affect the normal operation of the power supply. The above problems need to be solved urgently. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the utility model provides a prefabricated trench cover.

[0004] A prefabricated trench cover comprises a frame, a grille plate and a screen; the frame is a square ring structure, and the top opening of the frame is greater than or equal to the size of the grille plate to allow the grille plate to enter, and the bottom opening of the frame is smaller than the size of the grille plate to support the grille plate; the grille plate is made of fiberglass; the screen is arranged at the bottom opening of the frame, and the mesh size of the screen is smaller than the size of the vent of the grille plate to prevent animals from passing through the screen.

[0005] The prefabricated trench cover of the utility model further includes a first reinforcing rib plate; the first reinforcing rib plate is arranged at the angle of the top opening of the frame and can limit the grating plate from detaching from the top opening of the frame.

[0006] In the prefabricated trench cover of the utility model, the first reinforcing rib plate is a triangular plate and is provided with a mounting hole.

[0007] The prefabricated trench cover of the utility model further includes a second reinforcing rib plate; the second reinforcing rib plate is arranged parallel to the short side of the frame and is fixed on the bottom opening of the frame.

[0008] In the prefabricated trench cover of the utility model, the frame includes a first frame and a second frame; the first frame and the second frame are stacked and fixedly connected, and the inner frame size of the first frame is larger than that of the second frame; the first frame is made by welding flat iron; and the second frame is made by welding square tubes.

[0009] In the prefabricated trench cover of the utility model, the second square frame is made by welding 20mm×40mm hot-dip galvanized square tubes; the first square frame is made by welding 30mm wide hot-dip galvanized flat irons.

[0010] In the prefabricated trench cover of the utility model, the frame is made by welding hot-dip galvanized angle irons.

[0011] In the prefabricated trench cover of the utility model, the ventilation opening size of the grille plate is 40mm×40mm-50mm×50mm.

[0012] In the prefabricated trench cover of the present invention, the screen is made of stainless steel, the screen hole diameter is 6 mm, and the wire diameter is 0.6 or 0.8 mm.

[0013] The beneficial effects of the present invention are as follows: the prefabricated trench cover of the present invention is based on the use of a grille plate and a screen, wherein the grille plate is made of fiberglass, which can effectively reduce the overall weight of the prefabricated trench cover, is easy to install and maintain, and has better anti-corrosion and moisture-proof properties and is not easy to crack; a small-aperture screen is used to limit the entry of foreign objects (such as small animals), which can make the aperture of the grille plate larger, facilitate observation of the line conditions in the trench, and improve the air permeability of the prefabricated trench cover to avoid accumulation of water vapor in the trench, thereby ensuring the normal operation of the cable and power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the prefabricated trench cover of the utility model;

[0015] Figure 2 It is a schematic diagram of the main structure of the frame in a preferred embodiment of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of a frame in a preferred embodiment of the utility model when viewed from above.

[0017] Legend: 1. Frame; 11. First square frame; 12. Second square frame; 2. Grille plate; 3. Screen; 4. First reinforcing rib plate; 41. Mounting hole; 5. Second reinforcing rib plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The term "plurality" in the specification and claims of this application or the above-mentioned drawings refers to more than two (including two).

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The prefabricated trench cover of the present application is described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, a prefabricated trench cover comprises a frame 1, a grille plate 2 and a screen 3; the frame 1 is a square ring structure, and the top opening of the frame 1 is greater than or equal to the size of the grille plate 2 for the grille plate 2 to enter, that is, the grille plate 2 is located in the area surrounded by the frame 1, preferably with a clearance fit; the bottom opening of the frame 1 is smaller than the size of the grille plate 2 to support the grille plate 2; the grille plate 2 is made of fiberglass, preferably, the fiberglass is a composite fiberglass formed by resin fiberglass fiber filaments and calcium powder curing agent, of course, other composite fiberglass materials on the market can also be selected; the screen 3 is arranged at the bottom opening of the frame 1, and the mesh size of the screen 3 is smaller than the size of the vent of the grille plate 2 (that is, the structure surrounded by adjacent plates of the grille plate 2) to prevent animals from passing through the screen 3; specifically, the thickness of the frame 1 is determined according to needs, such as being set to 50mm.

[0023] The prefabricated trench cover of the utility model is based on the use of a grille plate and a screen. The grille plate is made of fiberglass, which can effectively reduce the overall weight of the prefabricated trench cover, facilitate installation and maintenance, and has better anti-corrosion and moisture-proof properties and is not easy to crack. The small-aperture screen is used to limit the entry of foreign objects (such as small animals), which can make the aperture of the grille plate larger, facilitate observation of the line conditions in the trench, and improve the air permeability of the prefabricated trench cover to avoid the accumulation of water vapor in the trench, thereby ensuring the normal operation of the cable and the power system.

[0024] In some preferred embodiments, the prefabricated trench cover also includes a first reinforcing rib plate 4; the first reinforcing rib plate 4 is arranged at the angle of the top opening of the frame 1, and can limit the grating plate 2 from detaching from the top opening of the frame 1; based on the setting of the first reinforcing rib plate 4, the structural strength of the frame 1 can be improved; preferably, the first reinforcing rib plate 4 is hot-dip galvanized flat iron.

[0025] In some preferred embodiments, the first reinforcing rib plate 4 is a triangular plate, preferably made by laser cutting; a mounting hole 41 is opened; the mounting hole 41 is provided to facilitate the later cleaning and maintenance of the groove of the trench cover plate, and the prefabricated trench cover plate can be easily removed.

[0026] In some preferred embodiments, the prefabricated trench cover also includes a second reinforcing rib plate 5; the second reinforcing rib plate 5 is arranged parallel to the short side of the frame 1 and fixed to the bottom opening of the frame 1; for example, the frame 1 is a rectangular structure, and the second reinforcing rib plate 5 is arranged parallel to the short side of the rectangle. Preferably, a plurality of second reinforcing rib plates 5 are provided and are spaced apart along the long side of the rectangle; the second reinforcing rib plate 5 can be selected as hot-dip galvanized flat iron, such as 3 mm thick flat iron.

[0027] In some preferred embodiments, Figure 2 and Figure 3 As shown, the frame 1 includes a first frame 11 and a second frame 12; the first frame 11 and the second frame 12 are stacked and fixedly connected, and the inner frame size of the first frame 11 is larger than that of the second frame 12; the first frame 11 is made of flat iron welding, preferably hot-dip galvanized flat iron; the second frame 12 is made of square tube welding, preferably hot-dip galvanized square tube; based on the setting of the frame 1 to include the first frame 11 and the second frame 12, the thickness of the grille plate 2 can be reduced, thereby further reducing the overall weight of the prefabricated trench cover; specifically, the first frame 11 is arranged along the edge of the second frame 12 and is perpendicular to the top surface of the second frame 12, the grille plate 2 is arranged in the area enclosed by the first frame 11, and the second frame 12 is used to support the bottom surface of the grille plate 2.

[0028] In some preferred embodiments, the second square frame 12 is made of 20 mm×40 mm square tubes welded together; the first square frame 11 is made of 30 mm wide flat iron bars, and the grid plate 2 can be 30 mm thick.

[0029] In some preferred embodiments, the frame 1 is made of hot-dip galvanized angle irons welded together; the use of hot-dip galvanized angle irons can improve the corrosion resistance of the prefabricated trench cover and meet the requirements of long-term outdoor use, such as selecting hot-dip galvanized angle irons of national standard 30mm×30mm-50mm×50mm.

[0030] In some preferred embodiments, the vent size of the grille plate 2 is 40mm×40mm-50mm×50mm; the vent size should not be too large, as it will affect the load-bearing performance, nor should it be too small, as it will affect the air permeability and make it inconvenient to observe the situation in the groove; the thickness of the grille plate 2 can be selected to be 30mm-50mm.

[0031] In some preferred embodiments, the screen 3 is made of stainless steel, the screen hole diameter is 6 mm, and the wire diameter is 0.6 or 0.8 mm. The screen 3 under this specification can not only ensure air permeability, but also effectively prevent small animals such as mice, snakes, etc. from entering.

[0032] In some preferred embodiments, each welding position of the prefabricated trench cover is ground and polished to prevent rust.

Claims

1. A prefabricated trench cover, characterized in that: It comprises a frame (1), a grid plate (2) and a screen (3); The frame (1) is a square ring structure, and the top opening of the frame (1) is greater than or equal to the size of the grid plate (2) so that the grid plate (2) can enter, and the bottom opening of the frame (1) is smaller than the size of the grid plate (2) so as to support the grid plate (2); The grille plate (2) is made of glass fiber reinforced plastic; The screen (3) is arranged at the bottom opening of the frame (1), and the mesh size of the screen (3) is smaller than the size of the vent of the grille plate (2) to prevent animals from passing through the screen (3).

2. The prefabricated trench cover according to claim 1, characterized in that: It also includes a first reinforcing rib plate (4); The first reinforcing rib plate (4) is arranged at the angle of the top opening of the frame (1) and is capable of limiting the grating plate (2) from detaching from the top opening of the frame (1).

3. The prefabricated trench cover according to claim 2, characterized in that: The first reinforcing rib plate (4) is a triangular plate and is provided with a mounting hole (41).

4. The prefabricated trench cover according to claim 1, characterized in that: Also includes a second reinforcing rib plate (5); The second reinforcing rib plate (5) is arranged parallel to the short side of the frame (1) and is fixed on the bottom opening of the frame (1).

5. The prefabricated trench cover according to claim 1, characterized in that: The framework (1) comprises a first frame (11) and a second frame (12); The first square frame (11) and the second square frame (12) are stacked and fixedly connected, and the inner frame size of the first square frame (11) is larger than that of the second square frame (12); the first square frame (11) is made by welding flat iron; and the second square frame (12) is made by welding square tubes.

6. The prefabricated trench cover according to claim 5, characterized in that: The second square frame (12) is made by welding a 20mm×40mm hot-dip galvanized square tube; the first square frame (11) is made by welding a 30mm wide hot-dip galvanized flat iron.

7. The prefabricated trench cover according to claim 1, characterized in that: The frame (1) is made by welding hot-dip galvanized angle irons.

8. The prefabricated trench cover according to claim 1, characterized in that: The size of the vent opening of the grid plate (2) is 40 mm×40 mm-50 mm×50 mm.

9. The prefabricated trench cover according to claim 1, characterized in that: The sieve (3) is made of stainless steel, the sieve hole diameter is 6 mm, and the wire diameter is 0.6 or 0.8 mm.

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