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, the inner ring bearing platform sinks relative to the outer ring bearing platform to form a stepped structure, 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, the well lid is erected on the first screw hole bearing platforms through the second screw hole bearing platforms, and the area of the contact part between the well lid and the inner ring bearing platform accounts for 0%-20% of the total area of the top face part of the inner ring bearing platform. Due to the fact that the first screw hole bearing platform extends outwards relative to the inner ring edge of the inner ring bearing platform, and the load from the well lid is mainly borne by the first screw hole bearing platform, the contact proportion between the well lid and the inner ring bearing platform is reduced, the mutual collision effect between the well lid and the inner ring bearing platform is reduced, and the service life of the well lid is prolonged. And therefore, noise generated between the well lid and the inner ring bearing platform is reduced.

Description

Technical Field

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

[0002] In the city's power supply network, a large number of cables are laid through underground pipelines. As an important node for connection and maintenance, the management and monitoring of the cable well covers are particularly important. Traditional power grid well covers have many problems in practical applications, such as water accumulation in the well, abnormal conditions of the well cover such as being opened and displaced, which are difficult to monitor, and parameters such as water level, cable temperature, humidity, etc. in the well environment that are difficult to monitor in real time. These problems not only increase the operating and maintenance costs of power companies, but also bring hidden dangers to urban public safety.

[0003] In order to solve the above problems, smart grid manhole covers came into being. Smart grid manhole covers are equipped with smart boxes, which can realize real-time monitoring and management of the manhole covers and the environment inside the wells by embedding various sensors and communication modules. After the smart box collects various data in the well, it transmits the data to the monitoring center through wireless communication technology (such as NB-IoT, 4G, etc.) to facilitate remote monitoring and data analysis. Unlike ordinary manhole covers, power grid manhole covers do not need to have the function of draining water into the well, but have higher requirements for sealing and waterproofing. However, the current power grid manhole covers lack effective waterproof and anti-deformation measures, which can easily cause damage to the smart modules installed in the manhole covers and reduce the service life of the smart modules.

[0004] The invention patent with the authorization announcement number CN106638703B provides an anti-theft, waterproof, dustproof and noise-proof manhole cover, which is sealed and waterproof by arranging elastic steel rings and sealing rings around the base and the side wall of the upper manhole cover, and cushioning and noise reduction by arranging a V-shaped sealing ring between the top surface of the base and the bottom surface of the upper manhole cover. However, after a long period of pressure from the manhole cover and the upper dynamic load, the V-shaped sealing ring will experience vibration wear and plastic deformation, thus losing its cushioning effect and causing the manhole cover to collide with the base and generate noise. Utility Model Content

[0005] The purpose of the 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] A base, comprising 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 support are arranged along the circumferential direction on the inner ring edge of the top surface of the inner ring support;

[0008] Manhole cover, a plurality of second screw hole platforms corresponding to the first screw hole platforms are arranged on the bottom edge of the manhole cover, and the manhole cover is erected on the first screw hole platforms through the second screw hole platforms. The contact area between the manhole cover and the inner ring platform accounts for 0% - 20% of the total area of the top surface of the inner ring platform;

[0009] Sealing ring, the sealing ring is clamped between the outer ring platform, the inner ring platform and the manhole cover.

[0010] Further, the outer side wall of the outer ring of the manhole cover extends outward to form a cantilever plate, and the sealing ring covers the entire side wall range of the cantilever plate to form a reverse buckle groove. In addition to the function between the first screw hole platform and the second screw hole platform, the cantilever plate can transfer the lateral force and vertical force of the manhole cover to the sealing ring, and then to the outer ring platform and the inner ring platform through the sealing ring, which can play a buffering role and greatly reduce the noise generated by the direct collision of the manhole cover with the base. The sealing ring at the top of the cantilever plate plays a sealing role to prevent water from penetrating into the cable well.

[0011] Further, a plurality of cantilever bumps extend outward from the side wall of the cantilever plate, and the sealing ring fits with the cantilever plate. The cantilever bumps can improve the connection firmness between the cantilever plate and the sealing ring and form a labyrinth path between the two to improve the sealing effect.

[0012] Further, the contact area between the manhole cover and the inner ring platform accounts for 0.5% - 5% of the total area of the top surface of the inner ring platform. Since the sealing ring, as a transition structure, transfers part of the load of the manhole cover to the inner ring platform, reducing the load on the first screw hole platform, the contact area between the manhole cover and the inner ring platform can be significantly reduced.

[0013] Further, the first screw hole platform sinks relative to the inner ring platform to form a positioning groove, and the second screw hole platform can be fitted with the positioning groove. The positioning groove can enable the second screw hole platform to be accurately assembled with the first screw hole platform, avoiding eccentric local loads between the two due to offset.

[0014] Further, the first screw hole platform and the second screw hole platform are connected by bolts. After being connected by bolts, the manhole cover and the base are in a stable state, ensuring that the manhole cover does not shake or move too much and reducing the collision between the manhole cover and the base.

[0015] Further, a plurality of sub-cover platforms are arranged along the circumference on the inner side of the bottom of the inner ring platform. The sub-cover platforms are reserved parts and can be used to carry additional structures such as anti-falling nets.

[0016] Further, a triangular bump extends outward from the inner edge of the top of the base, and the triangular bump is located between two adjacent sealing rings.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] Since the first screw hole bearing platform extends outwards relative to the inner edge of the inner ring bearing platform, and the load from the manhole cover is mainly borne by the first screw hole bearing platform, the contact ratio between the manhole cover and the inner ring bearing platform is reduced, the mutual collision effect between the manhole cover and the inner ring bearing platform is reduced, and thus the noise generated between the manhole cover and the inner ring bearing platform is reduced. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present drawings or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present drawings. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of a manhole cover structure for a power grid;

[0021] Figure 2 It is a partial structure schematic diagram A of the manhole cover structure;

[0022] Figure 3 It is a partial structure schematic diagram B of the manhole cover structure;

[0023] Figure 4 It is a partial structure schematic diagram C of the manhole cover structure.

[0024] In the figure: 1, base; 11, outer ring bearing platform; 12, inner ring bearing platform; 13, first screw hole bearing platform; 2, manhole cover; 21, second screw hole bearing platform; 22, cantilever plate; 221, cantilever bump; 3, sealing ring; 31, reverse buckle groove; 4, positioning groove; 5, sub-cover bearing platform; 6, triangular bump. Detailed Description of the Embodiments

[0025] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will describe and explain the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in such a development process may be complex and time-consuming, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing, or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0027] However, there will be cases where unnecessary detailed descriptions are omitted. For example, there are cases where detailed descriptions of well-known matters are omitted and repeated descriptions of actually identical structures are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present application and are not intended to limit the subject matter recited in the claims.

[0028] Please refer to Figures 1-4 As shown, in the embodiment of the present utility model, 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 bearing platform 11 and an inner ring bearing platform 12. The inner ring bearing platform 12 sinks relative to the outer ring bearing platform 11 to form a stepped structure. A plurality of first screw hole bearing platforms 13 are arranged along the circumferential direction on the inner circumferential edge of the top surface of the inner ring bearing platform 12. A plurality of second screw hole bearing platforms 21 corresponding to the first screw hole bearing platforms 13 are arranged on the bottom edge of the manhole cover 2. The manhole cover 2 is mounted on the first screw hole bearing platform 13 through the second screw hole bearing platforms 21. The area of the contact part between the manhole cover 2 and the inner ring bearing platform 12 accounts for 0% - 20% of the total area of the top surface part of the inner ring bearing platform 12. The sealing ring 3 is clamped between the outer ring bearing platform 11, the inner ring bearing platform 12, and the manhole cover 2.

[0029] It should be noted here that the area of the top part of the inner ring bearing platform 12 referred to in this article does not include the area of the second screw hole bearing platform 21 part.

[0030] The outer ring bearing platform 11 is usually combined with the concrete at the bottom to transfer the acting force of the entire 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 bearing platform 12 is used to place the sealing ring 3 and the manhole cover 2, so that the top elevation of the manhole cover 2 after assembly is flush with the top elevation of the outer ring bearing platform 11. The sealing ring 3 plays a role in sealing and buffering, preventing external water from seeping into the cable well through the edge of the manhole cover 2, and protecting the equipment and intelligent box inside the cable well. When the manhole cover 2 moves laterally, the sealing ring 3 can also prevent the manhole cover 2 from directly colliding with the outer ring bearing platform 11. The first screw hole bearing platform 13 is formed by a structure extending outward from the inner ring edge of the inner ring bearing platform 12. After the second screw hole bearing platform 21 of the manhole cover 2 is placed on the top surface of the first screw hole bearing platform 13, the manhole cover 2 and the upper load of the manhole cover 2 are transferred to the first screw hole bearing platform 13, and the manhole cover is prevented from falling through the limiting effect of the first screw hole bearing platform 13, reducing the contact area between the manhole cover 2 and the inner ring bearing platform 12.

[0031] In one embodiment, since the contact area between the first screw hole bearing platform 13 and the second screw hole bearing platform 21 is small, when assembling the manhole cover 2 and the base 1, there is a risk that the manhole cover 2 will fall into the cable well; when the manhole cover 2 and the base 1 are assembled, there is also a risk of falling if the manhole cover 2 rotates. Therefore, in addition to the cooperation between the first screw hole bearing platform 13 and the second screw hole bearing platform 21, a certain contact area needs to be retained between the manhole cover 2 and the inner ring bearing platform 12 to prevent the manhole cover 2 from falling. And in order to avoid an increase in the collision rate and noise due to too large a contact area between the manhole cover 2 and the inner ring bearing platform 12, it is necessary to control the proportion of the contact area between the manhole cover 2 and the inner ring bearing platform 12 in the total area of the top part of the inner ring bearing platform 12. Therefore, the proportion is controlled between 0% and 20%.

[0032] In one embodiment, the first screw hole bearing platform 13 and the second screw hole bearing platform 21 are connected by bolts. After being connected by bolts, there will be no lateral movement between the first screw hole bearing platform 13 and the second screw hole bearing platform 21, restricting the rotational freedom of the manhole cover 2, and there will be no risk of rotational drop during the use of the manhole cover 2. Therefore, there may be no contact area between the manhole cover 2 and the inner ring bearing platform 12, and the gravity and top load of the manhole cover 2 are borne by the first screw hole bearing platform 13. Therefore, the proportion of the contact area between the manhole cover 2 and the inner ring bearing platform 12 to the total area of the top part of the inner ring bearing platform 12 can be 0%.

[0033] As a further solution of the present invention, the outer side wall of the manhole cover 2 extends outward to form a cantilever plate 22. The cantilever plate 22 has side wall regions in three directions. The sealing ring 3 is coated on the entire side wall range of the cantilever plate 22 to form a reverse buckle groove 31. The sealing ring 3 is located between the manhole cover 2 and the base 1 to play a role in sealing and waterproofing. In addition, the entire cantilever plate 22 is located inside the reverse buckle groove 31. The sealing ring 3 serves as a buffer structure between the manhole cover 2 and the base 1, and can play a buffering role in all directions, preventing the manhole cover 2 from directly colliding with the base 1, and greatly reducing the noise generated by the vibration and displacement of the manhole cover 2.

[0034] The matching structure of the cantilever plate 22 and the sealing ring 3 is used as a cantilever structure, which is integrally mounted on the top of the inner ring bearing platform 12. It can be used as a limiting structure to prevent the manhole cover 2 from falling into the cable well, and as a force transmission structure to transfer the load of the manhole cover 2 to the top surface of the inner ring bearing platform 12 through the sealing ring 3. Therefore, the contact area between the manhole cover 2 and the inner ring bearing platform 12 can be greatly reduced. In this embodiment, the proportion of the contact area between the manhole cover 2 and the inner ring bearing platform 12 in the total area of the top surface of the inner ring bearing platform 12 can be reduced to 0% - 5%.

[0035] The manhole cover 2 and the inner ring bearing platform 12 can be in a completely non-contact state, and thus the noise caused by the collision and contact between the manhole cover 2 and the inner ring bearing platform 12 can be almost completely eliminated. There may also be a partial contact area between the manhole cover 2 and the inner ring bearing platform 12 to prevent the sealing ring 3 from undergoing plastic deformation under long-term compression, resulting in a reduction in the load-bearing ratio, so that most of the load of the manhole cover 2 is applied to the first screw hole bearing platform 13, which may cause damage and deformation of the first screw hole bearing platform 13. When the first screw hole bearing platform 13 and the second screw hole bearing platform 21 are connected by bolts, applying most of the load of the manhole cover 2 to the first screw hole bearing platform 13 may also cause damage and deformation of the bolts.

[0036] In addition, under the pressing action of the cantilever plate 22 on the manhole cover 2, the cantilever plate 22 and the sealing ring 3 can be fully and tightly combined, which can significantly improve the sealing and waterproof effect of the sealing ring 3.

[0037] Specifically, please refer to Figure 2 As shown, a plurality of cantilever bumps 221 extend outward from the side wall of the cantilever plate 22, and the sealing ring 3 and the cantilever plate 22 are mutually attached. The internal structure of the sealing ring 3 and the cantilever plate 22 can be mutually fitted, so that a labyrinth path is formed between the sealing ring 3 and the cantilever plate 22 through the cantilever bumps 221, increasing the difficulty of water penetration. In addition, the formation of the cantilever bumps 221 provides a limiting structure, increasing the structural complexity between the sealing ring 3 and the cantilever plate 22, and thus improving the bonding strength to prevent the two from separating.

[0038] Please refer to Figure 1 、 Figure 3 and Figure 4As shown, the first screw hole support 13 is sunken relative to the inner ring support 12 to form a positioning groove 4, and the second screw hole support 21 can be interlocked with the positioning groove 4. The positioning groove 4 can enable the second screw hole support 21 to be accurately assembled with the first screw hole support 13, so that the first screw hole support 13 and the second screw hole support 21 can be accurately positioned when being bolted, thereby improving the user experience when assembling the manhole cover 2.

[0039] See also Figure 2 As shown, a plurality of sub-cover platforms 5 are provided along the circumferential direction on the inner side of the bottom of the inner ring platform 12. The sub-cover platforms 5 are reserved parts and can be used to carry additional anti-falling nets and other structures.

[0040] See also Figure 1 and Figure 4 As shown, the top inner ring edge of the base 1 extends outward to form a triangular protrusion 6, and the triangular protrusion 6 is located between two adjacent sealing rings 3. The triangular protrusion 6 serves as a limiting structure, which can prevent the two adjacent sealing rings 3 from moving relative to each other, thereby preventing the two adjacent manhole covers 2 from moving relative to each other, and isolating each manhole cover 2 area to form an independent area.

[0041] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and the same effect as the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining 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 arranged 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 arranged on the bottom edge of the manhole cover (2), the manhole cover (2) is mounted on the first screw hole supports (13) through the second screw hole supports (21), and the contact area between the manhole cover (2) and the inner ring support (12) accounts for 0% to 20% of the total area of ​​the top surface of the inner ring support (12); A sealing ring (3), wherein the sealing ring (3) is clamped between the outer ring support platform (11), the inner ring support platform (12) and the manhole cover (2).

2. A manhole cover structure for a power grid according to claim 1, characterized in that: The outer ring side wall of the manhole cover (2) extends outward to form a cantilever plate (22), and the sealing ring (3) covers the entire side wall range of the cantilever plate (22) to form a reverse buckle groove (31).

3. A manhole cover structure for a power grid according to claim 2, characterized in that: A plurality of cantilever protrusions (221) extend outward from the side wall of the cantilever plate (22), and the sealing ring (3) and the cantilever plate (22) are in contact with each other.

4. A manhole cover structure for a power grid according to claim 2, characterized in that: The contact area between the manhole cover (2) and the inner ring support platform (12) accounts for 0% to 5% of the total area of ​​the top surface of the inner ring support platform (12).

5. The manhole cover structure for a power grid according to claim 1, 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 (4), and the second screw hole support platform (21) can be interlocked with the positioning groove (4).

6. A manhole cover structure for a power grid according to any one of claims 1 to 5, characterized in that: The first screw hole support platform (13) and the second screw hole support platform (21) are connected via bolts.

7. A manhole cover structure for a power grid according to any one of claims 1 to 5, characterized in that: A plurality of sub-cover platforms (5) are arranged along the circumferential direction on the inner side of the bottom of the inner ring platform (12).

8. A manhole cover structure for a power grid according to any one of claims 1 to 5, characterized in that: The top inner ring edge of the base (1) extends outward to form a triangular convex block (6), and the triangular convex block (6) is located between two adjacent sealing rings (3).

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