An easy-to-open manhole cover

Abstract

This utility model proposes an easy-to-open manhole cover, relating to the field of manhole cover technology. The manhole cover includes: a base with a mounting groove on its bearing surface; a cover body adaptedly disposed in the mounting groove; and a connecting structure including a hinged first connector and a second connector. The end of the first connector away from the second connector is connected to the cover body, and the end of the second connector away from the first connector is rotatably disposed on the base. When the first connector rotates relative to the second connector, the cover body follows the first connector and flips relative to the base, disengaging from the mounting groove. When the second connector rotates relative to the base, the cover body rotates with the second connector. This manhole cover significantly reduces the force required for manual opening, effectively solving the problem of traditional manhole covers being difficult to open due to their weight.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and more specifically, to a manhole cover that is easy to open. Background Technology

[0002] Manhole covers are protective devices that cover the openings of underground facilities (such as drainage wells, cable wells, inspection wells, etc.). They are mainly used to prevent people and vehicles from falling into the wells, while also blocking debris from entering the wells, ensuring the safety of underground facilities and road traffic safety. They are commonly found in urban roads, sidewalks, residential areas, and other places.

[0003] Manhole covers mainly consist of two parts: the cover body and the manhole base. The cover body is the main structure that directly covers the manhole opening, and it is usually made of materials such as cast iron, concrete, or composite materials, depending on the usage scenario. The manhole base is a supporting component that is fixed to the edge of the manhole opening to support the cover body. Its inner side is designed with grooves or steps to fit the cover body, so that the cover body can be stably placed on the manhole base.

[0004] Currently, most manhole covers are hinged to the cover body and the manhole base for flipping and opening. This connection method can prevent the cover body from moving or being lost after it is opened. However, because the cover body needs to meet requirements such as load-bearing capacity and durability, the material and thickness are usually large, resulting in a heavy weight. When relying entirely on manual flipping and opening, the operation is difficult, not only time-consuming and laborious, but also potentially increasing the risk of operation due to uneven force. Utility Model Content

[0005] The purpose of this utility model is to provide a manhole cover that is easy to open, in order to solve the technical problems mentioned in the background art.

[0006] The embodiments of this utility model are implemented as follows: This application provides an easy-to-open manhole cover, comprising: a manhole base with a mounting groove on its bearing surface; a cover body adaptedly disposed in the mounting groove; and a connecting structure including a first connector and a second connector hinged together, wherein the end of the first connector away from the second connector is connected to the cover body, and the end of the second connector away from the first connector is rotatably disposed on the manhole base; wherein, when the first connector rotates relative to the second connector, the cover body follows the first connector to flip relative to the manhole base and disengage from the mounting groove. When the second connector rotates relative to the well base, the cover rotates with the second connector. The well base is provided with a mounting hole, the top end of which extends into the mounting groove, and the bottom end of which extends into the bottom side of the well base. The second connector includes a connecting post that is inserted into the mounting hole. The top end of the connecting post extends into the mounting groove and is provided with a limiting piece. The bottom end of the connecting post extends into the bottom of the well base and is threaded with a limiting nut. The top side of the limiting piece is provided with a hinge seat for hinged engagement with the first connector.

[0007] Furthermore, based on the aforementioned scheme, a first drainage hole is provided on the cover and a second drainage hole is provided on the well base.

[0008] Furthermore, based on the aforementioned scheme, the cover is provided with a connection opening for insertion and engagement with the first connector, and a movable connection component is provided between the first connector and the connection opening for connecting or disconnecting the first connector and the cover.

[0009] Furthermore, based on the aforementioned scheme, the aforementioned movable connecting component includes a square rod that passes through the aforementioned first connecting member, and the aforementioned first connecting member is provided with a guide groove adapted to the sliding of the aforementioned square rod. The side wall of the connecting opening corresponding to any end of the aforementioned square rod is provided with an adjusting groove, wherein any of the aforementioned adjusting grooves includes a first adjusting groove and a second adjusting groove. The aforementioned first adjusting groove is adapted to the corresponding end of the aforementioned square rod, and the aforementioned second adjusting groove can accommodate the end of the corresponding aforementioned square rod to slide in. Moreover, the diameter of the aforementioned second adjusting groove is larger than the diameter of the aforementioned square rod.

[0010] Furthermore, based on the aforementioned scheme, the limiting structure includes a locking bolt disposed on the top of the square rod; wherein, the guide groove is provided with two threaded holes, when the locking bolt is screwed into the first threaded hole, the square rod is positioned in the first adjusting groove, and when the locking bolt is screwed into the second threaded hole, the square rod is positioned in the second adjusting groove.

[0011] Furthermore, based on the aforementioned solution, the top side of the first connector is provided with a disassembly port that communicates with the guide groove, and the disassembly port is detachably provided with a sealing plate by screws.

[0012] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects: This application presents an easy-to-open manhole cover that achieves effortless opening through a connecting structure. Its core principle utilizes the hinged connection between the first and second connecting parts, and the rotatable connection between the second connecting part and the manhole base, to decompose the opening action of the cover into two stages: First, the cover undergoes an initial flip by rotating the first connecting part relative to the second connecting part, disengaging from the mounting groove of the manhole base. Then, the second connecting part continues to rise by rotating relative to the manhole base. When the cover rotates to the side of the manhole base, the base provides effective support, distributing the cover's weight with this support. This design changes the traditional single-flip opening method. Through the combined effect of "segmented rotation + support and leverage," it significantly reduces the force required for manual opening, effectively solving the problem of traditional manhole covers being difficult to open due to their weight. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 An isometric view of an easy-to-open manhole cover according to an embodiment of this utility model. Figure 1 ; Figure 2 An isometric view of an easy-to-open manhole cover according to an embodiment of this utility model. Figure 2 ; Figure 3 This is an isometric view of a manhole cover after it has been flipped open, according to an embodiment of the present invention. Figure 4 This is an isometric view of a manhole cover after it has been flipped and rotated, which is easy to open, according to an embodiment of this utility model. Figure 5 for Figure 1 A magnified view of part A in the image; Figure 6 This is a partial schematic diagram showing the cooperation between the well base, the first connecting member, and the second connecting member in an embodiment of this utility model; Figure 7 This is a partial sectional view of the well base according to an embodiment of the present utility model; Figure 8This is an isometric view of the cover body of an embodiment of this utility model.

[0015] Icons: 1-Well base, 101-Mounting groove, 2-Cover, 3-First drainage hole, 4-Second drainage hole, 5-First connector, 6-Second connector, 7-Limit nut, 8-Sealing plate, 9-Square rod, 10-Locking bolt, 11-First threaded hole, 12-Guide groove, 13-Adjusting groove, 14-Second threaded hole, 15-Limit plate, 16-Hinge seat. Detailed Implementation

[0016] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0017] Please refer to Figures 1-8 This application provides an easy-to-open manhole cover, comprising: a manhole base 1 with a mounting groove 101 on its bearing surface; a cover body 2 adaptedly disposed in the mounting groove 101; and a connecting structure including a hinged first connector 5 and a second connector 6, wherein the end of the first connector 5 away from the second connector 6 is connected to the cover body 2, and the end of the second connector 6 away from the first connector 5 is rotatably disposed on the manhole base 1; wherein, when the first connector 5 rotates relative to the second connector 6, the cover body 2 follows the first connector 5 to flip relative to the manhole base 1 and disengage from the mounting groove 101. When the second connector 6 rotates relative to the well base 1, the cover 2 rotates with the second connector 6. The well base 1 is provided with a mounting hole, the top end of which extends into the mounting groove 101, and the bottom end of which extends into the bottom side of the well base 1. The second connector 6 includes a connecting post that is inserted into the mounting hole. The top end of the connecting post extends into the mounting groove 101 and is provided with a limiting piece 15. The bottom end of the connecting post extends into the bottom of the well base 1 and is threaded with a limiting nut 7. The top side of the limiting piece 15 is provided with a hinge seat 16 for hinged engagement with the first connector 5.

[0018] This application presents an easy-to-open manhole cover that achieves effortless opening through a connecting structure. Its core principle utilizes the hinged connection between the first connecting member 5 and the second connecting member 6, and the rotatable connection between the second connecting member 6 and the manhole base 1, to decompose the opening action of the cover 2 into two stages: First, the cover 2 undergoes an initial flip by rotating the first connecting member 5 relative to the second connecting member 6, disengaging from the mounting groove 101 of the manhole base 1. Then, the second connecting member 6 continues to rise by rotating relative to the manhole base 1. When the cover 2 rotates to the side of the manhole base 1, the manhole base 1 provides effective support, distributing the weight of the cover 2 with the support force. This design changes the traditional single-flip opening method. Through the combined effect of "segmented rotation + support and leverage," it significantly reduces the force required for manual opening, effectively solving the problem of difficulty in opening traditional manhole covers due to the weight of the cover 2.

[0019] Specifically, the mounting hole of the well base 1 is inserted into the connecting post of the second connecting member 6. With the help of the top limiting piece 15 and the bottom limiting nut 7, the second connecting member 6 can be quickly assembled and firmly fixed on the well base 1, preventing it from loosening or shifting during the flipping of the cover 2. At the same time, the hinge seat 16 at the top of the connecting post can provide a stable hinge fulcrum for the first connecting member 5, ensuring a smooth connection between the two rotational movements. This structure simplifies the installation process and ensures the stability of the opening process through reliable connection, further improving the practicality and durability of the device.

[0020] In a preferred embodiment, the cover 2 is provided with a first drainage hole 3 and the well base 1 is provided with a second drainage hole 4.

[0021] In the above embodiment, the first drainage hole 3 on the cover 2 cooperates with the second drainage hole 4 on the well base 1 to quickly drain the water accumulated on the surface of the cover 2 into the well, avoid water stagnation on the cover 2 and affect passage safety, and at the same time reduce the long-term immersion damage of water on the cover 2 and the well base 1.

[0022] In a preferred embodiment, the cover 2 is provided with a connection opening for insertion and engagement with the first connector 5. A movable connection component is provided between the first connector 5 and the connection opening to enable the first connector 5 and the cover 2 to form a connection relationship or a disconnection relationship.

[0023] In the above embodiments, when the two are connected, the first connector 5 can stably drive the cover 2 to complete the two-stage rotation opening action, ensuring the smooth realization of the labor-saving opening function; when the two are disconnected, the cover 2 is separated from the first connector 5. At this time, if the cover 2 is subjected to external force (such as being run over by a vehicle or being moved by people), the force will not be transmitted to the hinge structure of the first connector 5 and the second connector 6, which can prevent the hinge part from being worn or deformed due to the force on the cover 2, effectively protecting the hinge structure and extending the service life of the connection structure.

[0024] In a preferred embodiment, the movable connection assembly includes a square rod 9 that passes through the first connector 5, and the first connector 5 is provided with a guide groove 12 adapted to the sliding of the square rod 9. An adjustment groove 13 is provided on the side wall of the connection opening corresponding to any end of the square rod 9. Each of the adjustment grooves 13 includes a first adjustment groove and a second adjustment groove. The first adjustment groove is adapted to the corresponding end of the square rod 9, and the second adjustment groove can accommodate the end of the square rod 9 to slide in. The diameter of the second adjustment groove is larger than the diameter of the square rod 9.

[0025] In the above embodiment, when the end of the square rod 9 slides into the first adjustment groove, its compatibility with the groove body enables a stable connection between the first connector 5 and the cover 2, ensuring that the two move synchronously when the cover 2 is opened. When the end of the square rod 9 slides into the second adjustment groove with a larger inlet diameter, a space for movement is formed between the square rod 9 and the groove body, which can easily separate the first connector 5 from the cover 2, completing the disconnection action. This structure achieves the switching of the connection state through mechanical sliding, which is simple and intuitive to operate. The cooperation between the square rod 9 and the guide groove 12 ensures the stability of the sliding process and avoids jamming when connecting or disconnecting. At the same time, the groove design of the adjustment groove 13 makes the switching boundary between the two states clear, which not only meets the connection requirements when the cover 2 is opened, but also completely cuts off the force transmission when disconnecting, effectively protecting the hinge structure.

[0026] In a preferred embodiment, the limiting structure includes a locking bolt 10 disposed on the top of the square rod 9; wherein the guide groove 12 is provided with two threaded holes, when the locking bolt 10 is screwed into the first threaded hole 11, the square rod 9 is positioned in the first adjusting groove, and when the locking bolt 10 is screwed into the second threaded hole 14, the square rod 9 is positioned in the second adjusting groove.

[0027] In the above embodiment, the limiting structure uses two threaded holes at the top of the square rod 9, each containing a locking bolt 10 and a guide groove 12. This design has significant advantages: when the locking bolt 10 is screwed into the first threaded hole 11, the square rod 9 is stably confined within the first adjustment groove, ensuring a secure connection between the first connector 5 and the cover 2, preventing accidental separation during the opening of the cover 2; when switching to the disconnected state, simply screwing the locking bolt 10 into the second threaded hole 14 reliably positions the square rod 9 in the second adjustment groove, ensuring stability in the disconnected state. This design, through the strong fixation of the threaded connection, precisely locks the two working states, preventing accidental slippage of the square rod 9 under force. Simultaneously, the threaded connection is simple and convenient to operate, allowing for quick switching between connected and disconnected states, thus balancing structural stability and operational flexibility.

[0028] In a preferred embodiment, the top side of the first connector 5 is provided with a disassembly port that communicates with the guide groove 12, and the disassembly port is detachably provided with a sealing plate 8 by means of screws.

[0029] In the above embodiments, during daily use, the sealing plate 8 can seal the guide groove 12 to prevent dust, debris, or rainwater from entering the groove and affecting the smooth sliding of the square rod 9, thus ensuring the stable operation of the movable connecting assembly. When it is necessary to inspect or replace the inside of the guide groove 12 or the square rod 9, simply remove the screws and take off the sealing plate 8, and the operation can be conveniently performed through the disassembly port without disassembling the entire structure of the first connecting member 5. This design provides convenience for later maintenance while achieving the protective function, ensuring the sealing and durability of the structure, and reducing maintenance costs.

[0030] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0031] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A manhole cover which is easy to open, characterized in that, include: The well base (1) has an installation groove (101) on its bearing surface; Cover (2), adaptedly disposed in the mounting groove (101); and The connection structure includes a first connector (5) and a second connector (6) that are hinged together. The end of the first connector (5) away from the second connector (6) is connected to the cover (2). The end of the second connector (6) away from the first connector (5) is rotatably mounted on the well base (1). When the first connector (5) rotates relative to the second connector (6), the cover (2) follows the first connector (5) and flips relative to the well base (1) and disengages from the mounting groove (101). When the second connector (6) rotates relative to the well base (1), the cover (2) follows the second connector (6) and rotates. The well base (1) is provided with a mounting hole. The top end of the mounting hole extends into the mounting groove (101), and the bottom end of the mounting hole extends into the bottom side of the well base (1). The second connecting member (6) includes a connecting post that is inserted into the mounting hole. The top end of the connecting post extends into the mounting groove (101) and is provided with a limiting piece (15). The bottom end of the connecting post extends into the bottom of the well base (1) and is threaded with a limiting nut (7). The top side of the limiting piece (15) is provided with a hinge seat (16) for hinged engagement with the first connecting member (5).

2. A manhole cover according to claim 1, wherein The cover (2) has a first drainage hole (3), and the well base (1) has a second drainage hole (4).

3. A manhole cover according to claim 1, wherein The cover (2) is provided with a connection opening for insertion and engagement with the first connector (5). A movable connection component is provided between the first connector (5) and the connection opening for connecting or disconnecting the first connector (5) and the cover (2).

4. A cover according to claim 3, wherein, The movable connecting assembly includes a square rod (9) that passes through the first connecting member (5), and the first connecting member (5) is provided with a guide groove (12) adapted to the sliding of the square rod (9). An adjusting groove (13) is provided on the side wall of the connecting opening corresponding to either end of the square rod (9). Each of the aforementioned adjustment grooves (13) includes a first adjustment groove and a second adjustment groove. The first adjustment groove is adapted to the end of the corresponding square rod (9), and the second adjustment groove is capable of accommodating the end of the corresponding square rod (9) to slide in. The diameter of the second adjustment groove is larger than the diameter of the square rod (9).

5. A cover according to claim 4, wherein, A locking bolt (10) is provided at the top of the square rod (9); The guide groove (12) is provided with two threaded holes. When the locking bolt (10) is screwed into the first threaded hole (11), the square rod (9) is positioned in the first adjustment groove. When the locking bolt (10) is screwed into the second threaded hole (14), the square rod (9) is positioned in the second adjustment groove.

6. A cover according to claim 5, wherein, The top side of the first connector (5) is provided with a disassembly port that communicates with the guide groove (12), and the disassembly port is detachably provided with a sealing plate (8) by screws.

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