Well lid structure for power grid

Abstract

The utility model discloses a well lid structure for a power grid, which belongs to the technical field of well lids and comprises a base, a well lid and a sealing ring. The base comprises an outer ring bearing platform and an inner ring bearing platform, and a plurality of first screw hole bearing platforms are arranged on the inner ring edge of the top face of the inner ring bearing platform in the circumferential direction. A plurality of second screw hole bearing platforms corresponding to the first screw hole bearing platforms are arranged on the edge of the bottom face of the well lid and are in bolt connection with the first screw hole bearing platforms, and the side wall of the outer ring of the well lid extends outwards to form a cantilever plate. And the sealing ring is clamped among the outer ring bearing platform, the inner ring bearing platform and the well lid and wraps the whole side wall range of the cantilever plate. The gravity and load of the well lid are mainly transmitted to the sealing ring through the cantilever plate and then transmitted to the inner ring bearing platform through the sealing ring. The sealing ring not only has a waterproof sealing function, but also has a buffering function, so that no contact part exists between the well lid and the inner ring bearing platform or the proportion of the contact part is extremely small, and noise generated by collision between the well lid and the inner ring bearing platform is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of manhole covers, in particular to a manhole cover structure for power grids. Background Art

[0002] In urban power supply networks, numerous cables are laid through underground pipelines. As key nodes for connection and maintenance, the management and monitoring of cable manhole covers are particularly crucial. Traditional manhole covers present numerous practical challenges, including water accumulation, difficulty monitoring abnormalities such as covers being opened or displaced, and difficulty in real-time monitoring of well environmental parameters such as water level, cable temperature, and humidity. These issues not only increase operating and maintenance costs for power companies but also pose a threat to urban public safety.

[0003] To address these issues, smart grid manhole covers have emerged. These covers incorporate a smart box, embedded with various sensors and communication modules, enabling real-time monitoring and management of the cover and the environment within. The smart box collects data from within the well and transmits it to a monitoring center via wireless communication technologies (such as NB-IoT and 4G), facilitating remote monitoring and data analysis. Unlike ordinary manhole covers, grid manhole covers do not require drainage and instead require a high level of sealing and waterproofing. However, current grid manhole covers lack effective waterproofing and anti-deformation measures, which can easily damage the smart modules installed within, reducing their service life.

[0004] The invention patent, with authorization announcement number CN106638703B, provides a theft-proof, waterproof, dustproof, and noise-proof manhole cover. This design utilizes elastic steel rings and sealing rings around the base and sidewalls of the upper manhole cover for waterproofing. A V-shaped sealing ring is placed between the top surface of the base and the bottom surface of the upper manhole cover to provide cushioning and noise reduction. However, the V-shaped sealing ring, subjected to long-term pressure from the manhole cover and dynamic loads from above, can experience vibration wear and plastic deformation, thus losing its cushioning effect and causing the manhole cover to collide with the base, generating noise. Utility Model Content

[0005] The purpose of the present utility model is to provide a manhole cover structure for a power grid to solve the problems raised in the above-mentioned prior art.

[0006] Provided is a manhole cover structure for a power grid, comprising:

[0007] The base includes an outer ring support and an inner ring support, wherein the inner ring support is sunken relative to the outer ring support to form a stepped structure, and a plurality of first screw hole supports are provided along the circumferential direction on the inner ring edge of the top surface of the inner ring support;

[0008] A manhole cover, wherein a plurality of second screw hole caps are provided on the bottom edge of the manhole cover and are arranged corresponding to the first screw hole caps, the manhole cover is mounted on the first screw hole caps via the second screw hole caps, the contact area between the manhole cover and the inner ring caps accounts for 0% to 5% of the total area of the top surface of the inner ring caps, and the outer ring sidewall of the manhole cover extends outward to form a cantilever plate;

[0009] The sealing ring is clamped between the outer ring support platform, the inner ring support platform and the manhole cover. The sealing ring covers the entire side wall range of the cantilever plate to form an inverted groove. The manhole cover is provided with a sealing cover on the top of the second screw hole support platform.

[0010] Furthermore, the sealing cover is integrally formed by extending the sealing ring toward the second screw hole support. After being integrally formed with the sealing ring, the stability of the sealing cover can be improved, and the sealing cover can be prevented from being separated from the second screw hole support due to external forces, thereby losing the sealing effect.

[0011] Furthermore, the outer edge of the manhole cover extends vertically along the circumferential direction to form a protrusion. The protrusion extends along the top edge of the second screw hole support platform and is located on the side of the second screw hole support platform facing the axis of the manhole cover. The sealing cover abuts against the protrusion at the corresponding position. The sealing cover can be engaged with the protrusion so that the edge of the sealing cover is in close contact with the protrusion to improve the sealing effect.

[0012] Furthermore, the protrusion on the edge of the second screw hole support is provided with a through slot, and the sealing cover extends toward and through the through slot, so that the through slot portion facilitates the operator to remove the sealing cover and operate the bolt in the second screw hole support.

[0013] Furthermore, the bottom of the inner ring platform extends downwardly in the circumferential direction to form a first rib, and the circumferential extension path of the first rib passes through the plurality of first screw hole platforms. The first rib can improve the structural strength and stability of the inner ring platform and the first screw hole platforms, and reduce the probability of deformation of the inner ring platform and the first screw hole platforms.

[0014] Furthermore, the bottom of the outer ring support extends circumferentially downward to form a second rib, with a reserved box for the intelligent system positioned between the first and second ribs. The first and second ribs increase the box's moment of inertia, thereby enhancing its strength and deformation resistance, protecting the intelligent module within.

[0015] Furthermore, the sealing cover extends into the interior of the second screw hole support to form a stopper, which can improve the connection stability between the sealing cover and the second screw hole support and completely eliminate the freedom of movement of the sealing cover in the radial direction of the second screw hole support.

[0016] Furthermore, the first screw hole support is sunken relative to the inner ring support to form a positioning groove, and the second screw hole support can be interlocked with the positioning groove. The positioning groove allows the second screw hole support to be accurately assembled with the first screw hole support, avoiding the difficulty in aligning the holes due to obstruction of vision during assembly.

[0017] Furthermore, a plurality of sub-cover platforms are provided on the inner side of the bottom of the inner ring platform along the circumferential direction. The sub-cover platforms are reserved parts and can be used to carry additional anti-fall nets and other structures.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The gravity and load of the manhole cover are mainly transmitted to the sealing ring through the cantilever plate, and then to the inner ring pedestal. In addition to its waterproof sealing function, the sealing ring also acts as a buffer, ensuring that there is no contact or minimal contact between the manhole cover and the inner ring pedestal, thereby greatly reducing the noise generated by the collision between the manhole cover and the inner ring pedestal.

[0020] 2. The first and second screw hole caps are bolted together and limited in position, which can prevent the manhole cover from moving within the inner ring cap and improve the stability of the manhole cover. The upper part of the second screw hole cap is sealed with a sealing cap to prevent the ingress of external water, dust, sand and gravel, thereby improving the sealing effect of the manhole cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of a manhole cover structure for a power grid;

[0023] Figure 2 A is a schematic diagram of the cross-section structure of the manhole cover structure;

[0024] Figure 3 A is a partial structural diagram of a manhole cover structure;

[0025] Figure 4 Schematic diagram B of the cross-section structure of the manhole cover structure;

[0026] Figure 5 Schematic diagram B of the partial structure of the manhole cover structure.

[0027] In the figure: 1. Base; 11. Outer ring support; 111. Second stiffener; 12. Inner ring support; 121. First stiffener; 13. First screw hole support; 2. Manhole cover; 21. Second screw hole support; 22. Cantilever plate; 23. Bump; 24. Through groove; 3. Sealing ring; 31. Sealing cover; 311. Limit block; 32. Inverted groove; 4. Reserved box for intelligent system; 5. Positioning groove; 6. Sub-cover support. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0029] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can apply the present application to other similar scenarios based on these drawings without inventive effort. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0030] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repetitive descriptions of substantially identical structures may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Furthermore, the drawings and the following description are provided to facilitate a thorough understanding of this application by those skilled in the art and are not intended to limit the subject matter recited in the claims.

[0031] See also Figure 1-5As shown, in an embodiment of the present invention, a manhole cover structure for a power grid includes a base 1, a manhole cover 2, and a sealing ring 3. The base 1 includes an outer ring support 11 and an inner ring support 12. The inner ring support 12 is sunken relative to the outer ring support 11 to form a stepped structure. The inner edge of the top surface of the inner ring support 12 is circumferentially provided with a plurality of first screw hole supports 13. The bottom edge of the manhole cover 2 is provided with a plurality of second screw hole supports 21 arranged corresponding to the first screw hole supports 13. The plurality of second screw hole supports 21 are bolted to the corresponding first screw hole supports 13. The contact area between the manhole cover 2 and the inner ring support 12 accounts for 0% to 5% of the total area of the top surface of the inner ring support 12. The outer sidewall of the manhole cover 2 extends outward to form a cantilever plate 22. The sealing ring 3 is clamped between the outer ring base 11, the inner ring base 12 and the manhole cover 2. The sealing ring 3 covers the entire side wall range of the cantilever plate 22 to form a reverse buckle groove 32. The manhole cover 2 is located on the top of the second screw hole base 21 and is provided with a sealing cover 31.

[0032] It should be noted that the area of the top portion of the inner ring support 12 referred to herein does not include the area of the second screw hole support 21 .

[0033] The outer ring support 11 is usually combined with the concrete on the bottom surface to transfer the force of the overall structure of the manhole cover 2 and the base 1 to the ground foundation. The stepped structure formed by the sinking of the inner ring support 12 is used to place the sealing ring 3 and the manhole cover 2, so that the top surface elevation of the manhole cover 2 after assembly is flush with the top surface elevation of the outer ring support 11. The sealing ring 3 plays a sealing and buffering role, preventing external water from seeping into the cable well through the edge of the manhole cover 2, thereby protecting the equipment and smart boxes inside the cable well. The gravity of the manhole cover 2 and the load borne on the upper part are transmitted to the reverse buckle groove 32 of the sealing ring 3 through the cantilever plate 22, and then transmitted to the inner ring support 12 through the sealing ring 3, which can avoid contact and collision between the manhole cover 2 and the inner ring support 12 when moving, thereby reducing the noise generated by the collision.

[0034] Due to the presence of the first screw hole support 13, the sealing ring 3 needs to be arranged around the first screw hole support 13. Therefore, the portion of the inner ring support 12 surrounding the first screw hole support 13 will leave some area due to the avoidance of the sealing ring 3. This area can be used to accommodate the manhole cover 2 to ensure a tight fit between the sealing ring 3 and the manhole cover 2 to ensure a sealing effect. Alternatively, the sealing ring 3 can be directly formed into a shape that surrounds the entire space around the first screw hole support 13, which can also achieve a tight fit between the sealing ring 3 and the manhole cover 2. Therefore, a certain contact area can be left between the manhole cover 2 and the inner ring support 12, or it can be completely avoided. The contact area between the manhole cover 2 and the inner ring support 12 accounts for 0% to 5% of the total area of the top surface of the inner ring support 12.

[0035] When the second screw-hole support 21 is bolted to the first screw-hole support 13, the bolts restrict the freedom of manhole cover 2 in all directions, reducing vibration and displacement of manhole cover 2. This stabilization of manhole cover 2 also reduces disturbances to sealing ring 3, preventing excessive disturbances that could reduce the sealing effectiveness of sealing ring 3. A sealing cap 31, located on top of the second screw-hole support 21, prevents external water, dust, sand, and gravel from entering the second screw-hole support 21 and causing problems such as infiltration and clogging.

[0036] Further, see Figure 2 and Figure 3 As shown, the sealing cover 31 is integrally formed by extending from the sealing ring 3 toward the second screw hole support 21. Made of the same material as the sealing ring 3, the sealing cover 31 exhibits elastic deformation, allowing the bolts inside to be easily accessed by removing the sealing cover 31. Restricted by the sealing ring 3, the sealing cover 31 prevents movement, enhancing its stability and maintaining the seal strength between the sealing cover 31 and the manhole cover 2, ensuring a secure seal.

[0037] The outer edge of the manhole cover 2 extends in the vertical direction along the circumference to form a protrusion 23. The protrusion 23 can be set along the entire circumference of the outer edge of the manhole cover 2, or it can be set only around the second screw hole base 21. The extension path of the protrusion 23 on the top edge of the second screw hole base 21 is located on the side of the second screw hole base 21 facing the axis of the manhole cover 2, and the sealing cover 31 abuts against the protrusion 23 at the corresponding position. The protrusion 23 can limit the sealing cover 31 in the lateral direction to ensure that the sealing cover 31 does not move. At the same time, the protrusion 23 bears part of the external load for the sealing cover 31, reducing the damage to the sealing cover 31 caused by the external load. Through the restriction of the protrusion 23, the sealing cover 31 can be engaged with the protrusion 23, so that the edge of the sealing cover 31 is close to the protrusion 23 to improve the sealing effect.

[0038] A through slot 24 is defined on the edge of the protrusion 23 on the second screw hole support 21. The through slot 24 extends across the entire width of the protrusion 23. A sealing cover 31 extends toward and through the through slot 24. The portion of the sealing cover 31 that extends through the through slot 24 serves as a support structure for opening the sealing cover 31, providing a foothold for the operator.

[0039] See also Figure 4 and Figure 5As shown, the bottom of the inner ring support 12 extends downward in the circumferential direction to form a first rib 121. The circumferential extension path of the first rib 121 passes through multiple first screw hole supports 13. When the bottom of the sealing ring 3 undergoes partial plastic deformation due to the gravity and load of the manhole cover 2, part of the force applied by the manhole cover 2 will be transmitted to the first screw hole support 13 through the bolts, and the first screw hole support 13 will play a partial load-bearing role. The first rib 121 can increase the cross-sectional moment of inertia of the first screw hole support 13 and the entire base 1, thereby improving the structural stability of the first screw hole support 13 and the base 1, and preventing the first screw hole support 13 from being deformed due to the force of the bolts.

[0040] The bottom of the outer ring support 11 extends circumferentially downward to form a second rib 111. A reserve box 4 for the intelligent system is located between the first and second ribs 121, 111. This box is used to store intelligent modules and embed various sensors and communication modules to enable real-time monitoring and management of the manhole cover 2 and the environment within the manhole. The gap between the first and second ribs 121, 111 provides installation space and a mounting structure for the reserve box 4. The first and second ribs 121, 111 also enhance the structural stability of the reserve box 4, preventing deformation of the reserve box 4 and damage to the internal intelligent modules.

[0041] See also Figure 3 and Figure 4 As shown, the sealing cover 31 extends into the interior of the second screw hole support 21 to form a stopper 311. The stopper 311 is integrally formed with the sealing cover 31, which can improve the connection stability between the sealing cover 31 and the second screw hole support 21 and completely eliminate the radial movement freedom of the sealing cover 31 in the second screw hole support 21.

[0042] See also Figure 3 and Figure 4 As shown, the first screw hole support 13 is sunken relative to the inner ring support 12 to form a positioning groove 5, and the second screw hole support 21 can be interlocked with the positioning groove 5. The positioning groove 5 allows the second screw hole support 21 to be accurately assembled with the first screw hole support 13, avoiding the difficulty in aligning the hole positions due to obstruction of vision during assembly of the second screw hole support 21 and the first screw hole support 13, thereby improving the user experience when assembling the manhole cover 2.

[0043] See also Figure 4 As shown, a plurality of sub-cover platforms 6 are provided on the inner side of the bottom of the inner ring platform 12 along the circumferential direction. The sub-cover platforms 6 are reserved parts and can be used to carry additional anti-fall nets and other structures.

[0044] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A manhole cover structure for a power grid, characterized in that: include: A base (1) comprising an outer ring support (11) and an inner ring support (12), wherein the inner ring support (12) is sunken relative to the outer ring support (11) to form a stepped structure, and a plurality of first screw hole support platforms (13) are provided along the circumferential direction on the inner ring edge of the top surface of the inner ring support (12); A manhole cover (2), wherein a plurality of second screw hole supports (21) arranged corresponding to the first screw hole supports (13) are provided on the bottom edge of the manhole cover (2), the plurality of second screw hole supports (21) are bolted to the corresponding first screw hole supports (13), the contact area between the manhole cover (2) and the inner ring support (12) accounts for 0% to 5% of the total area of the top surface of the inner ring support (12), and the outer ring side wall of the manhole cover (2) extends outward to form a cantilever plate (22); A sealing ring (3) is clamped between the outer ring support (11), the inner ring support (12) and the manhole cover (2), and the sealing ring (3) covers the entire side wall range of the cantilever plate (22) to form a reverse buckle groove (32). The manhole cover (2) is provided with a sealing cover (31) on the top of the second screw hole support (21).

2. A manhole cover structure for a power grid according to claim 1, characterized in that: The sealing cover (31) is formed integrally with the sealing ring (3) and extends toward the second screw hole support platform (21).

3. A manhole cover structure for a power grid according to claim 2, characterized in that: The outer edge of the manhole cover (2) extends in the circumferential direction toward the vertical direction to form a protrusion (23); the extension path of the protrusion (23) at the top edge of the second screw hole support (21) is located on the side of the second screw hole support (21) facing the axis of the manhole cover (2); and the sealing cover (31) abuts against the protrusion (23) at the corresponding position.

4. A manhole cover structure for a power grid according to claim 3, characterized in that: A through slot (24) is formed on the protrusion (23) located at the edge of the second screw hole support platform (21), and the sealing cover (31) extends toward the through slot (24) and passes through the through slot (24).

5. The manhole cover structure for a power grid according to claim 1, characterized in that: The bottom of the inner ring support (12) extends downward in the circumferential direction to form a first rib (121), and the extension path of the first rib (121) in the circumferential direction passes through a plurality of first screw hole supports (13).

6. A manhole cover structure for a power grid according to claim 5, characterized in that: The bottom of the outer ring support (11) extends downward in the circumferential direction to form a second rib (111), and an intelligent system reserved box (4) is provided between the first rib (121) and the second rib (111).

7. A manhole cover structure for a power grid according to any one of claims 1 to 6, characterized in that: The sealing cover (31) extends toward the interior of the second screw hole support platform (21) to form a limiting block (311).

8. A manhole cover structure for a power grid according to any one of claims 1 to 6, characterized in that: The first screw hole support platform (13) is sunken relative to the inner ring support platform (12) to form a positioning groove (5), and the second screw hole support platform (21) can be interlocked with the positioning groove (5).

9. A manhole cover structure for a power grid according to any one of claims 1 to 6, characterized in that: A plurality of sub-cover supports (6) are arranged on the inner side of the bottom of the inner ring support (12) along the circumferential direction.

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