An easy-to-open ductile iron manhole cover

Abstract

This utility model discloses an easy-to-open ductile iron manhole cover, including a manhole base and a cover plate. The cover plate is movably connected to the top of the manhole base, and a support ring is fixedly connected to the inner cavity of the manhole base. The bottom of the cover plate and the top of the support ring are fitted together. A handle hole is provided on the top of the cover plate near the left side. Two fixing plates are fixedly connected to the bottom of the cover plate near the left side. A movable rod is provided between the two fixing plates, and the two ends of the movable rod movably pass through the fixing plates. This utility model discloses an easy-to-open ductile iron manhole cover. By flipping down the cover plate, the cover plate causes a limiting block to touch the support ring. The limiting block moves to the right, and at the same time, the spring is compressed until the limiting block is below the support ring. Under the elastic action of the spring, the limiting block moves to the left. The limiting block moves until it is fitted together with the bottom of the support ring. At this time, the limiting block fixes the cover plate, preventing unauthorized personnel from accidentally opening it, thereby avoiding unnecessary safety hazards.

Description

Technical Field

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

[0002] Ductile iron manhole covers, with their excellent load-bearing strength, impact resistance, and durability, have become an indispensable infrastructure component in urban roads, highways, squares, and other areas, covering underground pipelines, cables, and drainage systems to ensure their safety and stability.

[0003] A search revealed that Chinese utility model patent CN201820319546.7 discloses a municipal manhole cover that is easy to open and close. It includes a manhole cover, a cover base, a hinge, a handle, a reinforcing rib, a drain outlet, an arc-shaped expansion, and a ring. The manhole cover is mounted on the cover base and connected to the cover base via a hinge. The surface of the manhole cover is provided with a handle. The cover base is provided with a ring of appropriate size to the manhole cover and a drain outlet is provided on the manhole cover. There are reinforcing ribs between the outer periphery of the cover base and the ring. The inner side of the handle is provided with an arc-shaped expansion.

[0004] The aforementioned patents lack a device for securing the manhole cover, allowing non-staff members or mischievous children to easily open it, thus creating unnecessary safety hazards. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a ductile iron manhole cover that is easy to open.

[0006] One of the objectives of this utility model is achieved through the following technical solution: An easy-to-open ductile iron manhole cover includes a manhole base and a cover plate. The cover plate is movably connected to the top of the manhole base. A support ring is fixedly connected to the inner cavity of the manhole base. The bottom of the cover plate is in contact with the top of the support ring. A handle hole is provided on the top of the cover plate near the left side. Two fixing plates are fixedly connected to the bottom of the cover plate near the left side. A movable rod is provided between the two fixing plates. Both ends of the movable rod movably pass through the fixing plates. A limit plate is fixedly connected to the right end of the movable rod. A spring is movably sleeved on the outer left end of the movable rod. A connecting plate is connected to the left end of the movable rod. A limit block is fixedly connected to the left side of the connecting plate. The limit block has a right-angled triangle cross-section and is in contact with the bottom of the support ring.

[0007] Preferably, a fixed seat is fixedly intercepted on the right side of the well base, and a connecting seat is fixedly connected to the right side of the cover plate. A connecting shaft is fixedly provided through the connecting seat, and the connecting shaft is fixedly connected to the inner cavity of the fixed seat.

[0008] Preferably, a through groove is provided on the top right side of the well seat, and the through groove matches the connecting seat.

[0009] Preferably, the connecting plate has an L-shaped cross-section, and a diagonal brace is fixedly connected to the inner side of the connecting plate. The connecting plate is located near the bottom right side of the handle hole.

[0010] Preferably, the left end of the spring is fixedly connected to the connecting plate, and the right end of the spring is fixedly connected to the adjacent fixing plate.

[0011] Preferably, a fixing ring is fixedly sleeved at the bottom outer side of the well base, and a plurality of first support seats are fixedly connected to the top of the fixing ring. The first support seats are fixedly connected to the outer side wall of the well base.

[0012] Preferably, the bottom of the support ring is fixedly connected to a plurality of second support seats, which are fixedly connected to the inner wall of the well base.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model provides an easy-to-open ductile iron manhole cover. By flipping down the cover plate, the cover plate causes the limiting block to touch the support ring. The limiting block then moves to the right while the spring is compressed until the limiting block is below the support ring. Under the elastic action of the spring, the limiting block moves to the left until it is in contact with the bottom of the support ring. At this point, the limiting block fixes the cover plate, preventing unauthorized personnel from accidentally opening it and thus avoiding unnecessary safety hazards. 2. This utility model provides an easy-to-open ductile iron manhole cover. Through the handle hole, the cover plate can be flipped over, and fingers can be pushed through the handle hole to move the connecting plate and the limiting block, achieving two goals at once. The limiting block can be moved to release the cover plate from its fixation, making it easy to open the cover plate for maintenance of underground pipelines, cables, etc. 3. This utility model provides an easy-to-open ductile iron manhole cover. By setting up a diagonal brace, the rigidity of the connecting plate can be increased, preventing the connecting plate from breaking and being damaged when the limit block flips down and touches the support ring, thereby improving the service life of the component.

[0014] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This utility model Figure 1 Exploded view; Figure 3 This is a front perspective view of the well base component of this utility model; Figure 4 This is a bottom perspective view of the cover plate of the component of this utility model; Figure 5 This is a frontal sectional perspective view of the present invention; Figure 6 This is a frontal perspective view of the limiting block of this utility model.

[0016] The following are the labels in the diagram: 1. Well base; 2. Fixing ring; 3. First support base; 4. Cover plate; 5. Connecting seat; 6. Connecting shaft; 7. Fixing seat; 8. Through groove; 9. Support ring; 10. Second support base; 11. Fixing plate; 12. Movable rod; 13. Limiting plate; 14. Spring; 15. Connecting plate; 16. Limiting block; 17. Diagonal brace plate; 18. Handle hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0018] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6A type of easy-to-open ductile iron manhole cover includes a manhole base 1 and a cover plate 4. A fixing ring 2 is fixedly fitted at the bottom outer side of the manhole base 1. Several first support seats 3 are fixedly connected to the top of the fixing ring 2. The first support seats 3 are fixedly connected to the outer side wall of the manhole base 1. The cover plate 4 is movably connected to the top of the manhole base 1. A fixing seat 7 is fixedly intercepted on the right side of the manhole base 1. A connecting seat 5 is fixedly connected to the right side of the cover plate 4. A connecting shaft 6 is fixedly passed through the connecting seat 5. The connecting shaft 6 is fixedly connected to the inner cavity of the fixing seat 7. A through groove 8 is opened at the top of the manhole base 1 near the right side. The through groove 8 matches the connecting seat 5. A support ring 9 is fixedly connected to the inner cavity of the manhole base 1. Several second support seats 10 are fixedly connected to the bottom of the support ring 9. The second support seats 10 are fixedly connected to the inner wall of the manhole base 1. The bottom of the cover plate 4 fits against the top of the support ring 9.

[0021] A handle hole 18 is provided on the top of the cover plate 4 near the left side. Two fixed plates 11 are fixedly connected to the bottom of the cover plate 4 near the left side. A movable rod 12 is provided between the two fixed plates 11. Both ends of the movable rod 12 movably pass through the fixed plates 11. A limit plate 13 is fixedly connected to the right end of the movable rod 12. A spring 14 is movably sleeved on the outer left end of the movable rod 12. A connecting plate 15 is connected to the left end of the movable rod 12. The left end of the spring 14 is fixedly connected to the connecting plate 15. The right end of the spring 14 is fixedly connected to the adjacent fixed plate 11. The bottom right side of the connecting plate 15 is near the handle hole 18. A limit block 16 is fixedly connected to the left side of the connecting plate 15. The cross-section of the limit block 16 is a right triangle. The limit block 16 fits against the bottom of the support ring 9.

[0022] In the above embodiment, during use, the manhole base 1 is sunk into the manhole platform, and the outer perimeter of the manhole base 1 is filled with materials such as asphalt and concrete. The top of the manhole base 1 is level with the road surface. Then, the cover plate 4 is flipped down, and the cover plate 4 flips downward with the connecting shaft 6 as the center. The cover plate 4 flips downward into the inner cavity of the manhole base 1. The cover plate 4 drives the limiting block 16 to flip together. After the limiting block 16 touches the support ring 9, the limiting block 16 moves to the right. The limiting block 16 drives the connecting plate 15 and the movable rod 12 to move to the left. At the same time, the spring 14 is compressed until the bottom of the cover plate 4 and the top of the support ring 9 are in contact with each other. At this time, the limiting block 16 is located below the support ring 9. Under the elastic action of the spring 14, the limiting block 16 moves to the left until the bottom of the support ring 9 is in contact with each other. At this time, the limiting block 16 fixes the cover plate 4 to prevent unauthorized personnel from accidentally opening it, thereby avoiding unnecessary safety hazards.

[0023] When opening the cover plate 4, the palm passes through the handle hole 18, and the fingers push the connecting plate 15 to the right. The connecting plate 15 drives the limiting block 16 and the movable rod 12 to move. At the same time, the spring 14 is compressed. After the limiting block 16 moves away from the bottom of the support ring 9, the cover plate 4 is released from its fixation. Then, the force on the connecting plate 15 is maintained, and the cover plate 4 is flipped up through the handle hole 18, making it easy to open the cover plate 4, thereby maintaining underground pipelines, cables, etc. Example

[0024] Please see Figure 6 The connecting plate 15 has an L-shaped cross-section, and a diagonal bracing plate 17 is fixedly connected to the inner side of the connecting plate 15.

[0025] In the above embodiment, the rigidity of the connecting plate 15 can be increased by setting the diagonal brace 17, which can prevent the connecting plate 15 from breaking and being damaged when the limit block 16 flips down and touches the support ring 9, thereby improving the service life of the component.

[0026] Working Principle: This utility model discloses an easy-to-open ductile iron manhole cover. During use, the manhole base 1 is sunk into the manhole platform, and the outer perimeter of the manhole base 1 is filled with materials such as asphalt and concrete. The top of the manhole base 1 is level with the road surface. Then, the cover plate 4 is flipped down, and the cover plate 4 flips downward around the connecting shaft 6. The cover plate 4 flips downward into the inner cavity of the manhole base 1. The cover plate 4 drives the limiting block 16 to flip together. After the limiting block 16 touches the support ring 9, the limiting block 16 moves to the right. The limiting block 16 drives the connecting plate 15 and the movable rod 12 to move to the left. At the same time, the spring 14 is compressed until the bottom of the cover plate 4 is in contact with the top of the support ring 9. At this time, the limiting block 16 is located below the support ring 9. Under the elastic action of the spring 14, the limiting block 16 moves to the left until it is in contact with the bottom of the support ring 9. At this time, the limiting block 16 fixes the cover plate 4, preventing unauthorized personnel from accidentally opening it, thereby avoiding unnecessary safety hazards.

[0027] When opening the cover plate 4, the palm passes through the handle hole 18, and the fingers push the connecting plate 15 to the right. The connecting plate 15 drives the limiting block 16 and the movable rod 12 to move. At the same time, the spring 14 is compressed. After the limiting block 16 moves away from the bottom of the support ring 9, the cover plate 4 is released from its fixation. Then, the force on the connecting plate 15 is maintained, and the cover plate 4 is flipped up through the handle hole 18, making it easy to open the cover plate 4, thereby maintaining underground pipelines, cables, etc.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A spheroidal graphite cast iron well lid convenient to open, comprising a well seat (1) and a cover plate (4), the cover plate (4) being movably connected on the top of the well seat (1), characterized in that: The well base (1) has a fixed ring (9) in its inner cavity. The bottom of the cover plate (4) is in contact with the top of the ring (9). The top of the cover plate (4) is provided with a handle hole (18) near the left side. The bottom of the cover plate (4) is fixedly connected with two fixed plates (11) near the left side. A movable rod (12) is provided between the two fixed plates (11). The two ends of the movable rod (12) can move through the fixed plates (11). The right end of the movable rod (12) is fixedly connected with a limiting plate (13). The left side of the movable rod (12) is movably sleeved with a spring (14). The left end of the movable rod (12) is connected with a connecting plate (15). The left side of the connecting plate (15) is fixedly connected with a limiting block (16). The cross-section of the limiting block (16) is a right triangle. The limiting block (16) is in contact with the bottom of the ring (9).

2. The ductile iron manhole cover that is easy to open according to claim 1, characterized in that: The right side of the well base (1) is fixedly intercepted by a fixed seat (7), and the right side of the cover plate (4) is fixedly connected to a connecting seat (5). A connecting shaft (6) is fixedly passed through the connecting seat (5), and the connecting shaft (6) is fixedly connected to the inner cavity of the fixed seat (7).

3. The ductile iron manhole cover that is easy to open according to claim 2, characterized in that: The top of the well seat (1) is provided with a through groove (8) near the right side, and the through groove (8) matches the connecting seat (5).

4. The ductile iron manhole cover that is easy to open according to claim 1, characterized in that: The connecting plate (15) has an L-shaped cross section. A diagonal brace (17) is fixedly connected to the inner side of the connecting plate (15). The connecting plate (15) is located near the bottom right side of the handle hole (18).

5. The ductile iron manhole cover that is easy to open according to claim 1, characterized in that: The left end of the spring (14) is fixedly connected to the connecting plate (15), and the right end of the spring (14) is fixedly connected to the adjacent fixing plate (11).

6. The easy-to-open ductile iron manhole cover according to claim 1, characterized in that: A fixing ring (2) is fixedly fitted at the bottom outer side of the well base (1). Several first support seats (3) are fixedly connected to the top of the fixing ring (2). The first support seats (3) are fixedly connected to the outer side wall of the well base (1).

7. The ductile iron manhole cover that is easy to open according to claim 1, characterized in that: The bottom of the support ring (9) is fixedly connected to several second support seats (10), which are fixedly connected to the inner wall of the well base (1).

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