Manhole cover capable of being leveled, fastened, jacked and unsealed

Abstract

The utility model belongs to the technical field of manhole covers, and particularly relates to a manhole cover capable of being leveled, fastened, jacked and unblocked. The technical problems that an existing manhole cover is unstable in cover buckling and difficult to adjust to be horizontal are solved. An inspection well lid capable of being leveled, fastened and jacked to be unblocked comprises a well base and a well lid body. The well seat is annular, a plurality of well seat counter bores are formed in the annular surface of the well seat, and well cover counter bores corresponding to the well seat counter bores are also formed in the well cover; the well seat counter bore is provided with an internal thread, the lower part of the stud is provided with an external thread and is screwed into the well seat counter bore, the middle part of the stud is fixedly provided with a cylindrical table, the upper half part of the stud extends into the well cover counter bore, and the cylindrical table is in contact with the bottom surface of the well cover; the top end of the double-end bolt is downwards provided with an inner hexagon, and the double-end bolt is provided with a nut. The well cover and the upper edge of the well seat ring can be adjusted to be located on the same plane, the well cover and the well seat can be fastened into a whole, and bumping impact of vehicles can be effectively relieved.

Description

Technical Field

[0001] This utility model belongs to the field of manhole cover technology, specifically a manhole cover that can be leveled, tightened, and lifted for release. Background Technology

[0002] Manhole covers are primarily installed on top of manholes in green belts, sidewalks, and motor vehicle lanes to prevent people or objects from falling in. Manhole covers are generally round and mostly connected to the manhole base by a hinge. When the upper edges of the manhole cover and the manhole base are not on the same plane, the manhole cover often breaks at the hinge after being impacted and run over by vehicles, the manhole base loosens, and the manhole opening collapses. Because the gap between the manhole cover and the manhole base is often clogged with dust, opening the manhole cover is often difficult, and resealing it often results in a loose fit. The patented technology "A Noise-Reducing Manhole Cover" (CN212388611U) has two or more fastening components between the manhole base and the cover, as well as pressure plates and ear plates, requiring a high level of installation skill. The "Adjustable Anti-Settlement Ductile Iron Manhole Cover" (CN212001279U) has a complex structure with two layers of pressure-bearing structure on the inner side, making its manufacturing and installation very difficult. Utility Model Content

[0003] This utility model addresses the technical problems of unstable sealing and difficulty in leveling existing manhole covers by providing a manhole cover that can be leveled, tightened, and lifted for release.

[0004] This utility model is achieved using the following technical solution: a manhole cover that can be leveled, tightened, and lifted for unsealing, comprising a manhole base and a manhole cover; the manhole base is annular, with multiple countersunk holes on the annular surface of the manhole base, and the manhole cover also has countersunk holes that correspond one-to-one with the countersunk holes of the manhole base and penetrate the manhole cover vertically; it also includes a double-ended bolt, with internal threads in the countersunk holes of the manhole base, external threads on the lower part of the double-ended bolt and screwed into the countersunk holes of the manhole base, a cylindrical platform fixed in the middle of the double-ended bolt, the upper half of the double-ended bolt extending into the countersunk holes of the manhole cover and the cylindrical platform contacting the bottom surface of the manhole cover; the top of the double-ended bolt has an internal hexagonal opening pointing downwards, and external threads and a nut are provided near the top of the double-ended bolt.

[0005] Furthermore, the outer side of the manhole base has an upward-convex, truncated cone structure with a larger top and a smaller bottom, while the middle section of the ring is horizontal. The countersunk hole of the manhole base is located on the middle section of the ring, and the inner side of the ring has a vertically convex frustum structure. The outer side of the manhole cover has a truncated cone structure (that mates with the manhole base) with a larger top and a smaller bottom. The outer perimeter of the bottom surface of the manhole cover has a horizontal section corresponding to the middle section of the ring of the manhole base. The inner side of the horizontal section has a vertical section, and the top of the vertical section extends inward and upward, while the top of the extended section becomes horizontal again. The countersunk hole of the manhole cover is located on the horizontal section of the manhole cover and extends upward through the manhole cover.

[0006] Furthermore, the double-ended bolts are fitted with washers above the cylindrical platform.

[0007] Furthermore, the manhole base has three countersunk holes, arranged at equal intervals around the center of the manhole base; the manhole cover also has three countersunk holes, arranged at equal intervals around the center of the manhole cover.

[0008] Furthermore, the structural gaps between the manhole cover and the manhole base, as well as between the manhole cover countersunk hole and the nut, are filled with foam rubber.

[0009] Most manhole covers currently use a hinged connection to the manhole base, which often results in broken hinge arms, unstable cover fastening, and easy deviation. This invention uses a specially designed double-ended bolt to firmly secure the manhole cover to the base, and can adjust the manhole cover's level to align with the upper edge of the base, providing shock absorption when vehicles drive over it. This invention uses foam rubber to fill all gaps between the manhole cover and the base, automatically filling and leveling from all directions. Compared to the old-fashioned cushioning pad, it has a stronger shock absorption function and can seal against moisture and dust intrusion, effectively protecting the double-ended bolt from corrosion. The double-ended bolt used in this invention is both a fastener and a lifting device, eliminating the need for prying or lifting when opening the manhole cover, thus eliminating damage to the cover and seat ring.

[0010] The beneficial effects of this utility model are as follows: The specially designed double-headed bolt can be used to adjust the manhole cover so that it is on the same plane as the upper edge of the manhole seat ring, and can fasten the manhole cover and the manhole seat together, which can effectively reduce the impact of vehicle bumps; the structure of the manhole cover and the manhole seat is changed to a frustum shape, and the support surface is further expanded. The gap between the two is filled with foam rubber, which can both reduce shock and prevent water vapor corrosion and dust from clogging the gap; the top of the double-headed bolt adopts an outer round threaded thread and an internal hexagonal structure. When it is necessary to open the manhole cover, the double-headed bolt is unscrewed with a hexagonal wrench, which is equivalent to the set screw immediately lifting the manhole cover, so that the manhole cover can be opened easily. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the utility model.

[0012] Figure 2 A top-view diagram of the manhole cover.

[0013] Figure 3 Side view of the double-ended bolt structure.

[0014] Figure 4 Top view of the double-ended bolt structure.

[0015] 1- Manhole base, 2- Manhole base countersunk hole, 3- Double-ended bolt, 4- Manhole cover;

[0016] 31- Bolt bottom thread, 32- Cylindrical platform, 33- Washer, 34- Hex socket, 35- Nut;

[0017] 41- Manhole cover countersunk hole. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-4 The present invention is further described below. This invention relates to a manhole cover that can be leveled, tightened, and lifted for release. Its innovation lies in the use of an improved special double-ended bolt. This bolt serves several purposes: first, it allows adjustment of the manhole cover 4 to align with the upper edge of the manhole base 1; second, it secures the manhole cover 4 and the manhole base 1 together; and third, to open the manhole cover 4, a hex wrench can be used to unscrew the bolt upwards, thus lifting and releasing the manhole cover 4. In this case, the double-ended bolt 3 acts as a set screw. Furthermore, the support structure between the manhole cover 4 and the manhole base 1 has been improved from a simple circular platform to a combination of a truncated cone and a circular platform, further expanding the support surface. Additionally, the structural gap between the manhole cover 4 and the manhole base 1 is filled with foam rubber for shock absorption and cushioning. Specifically, the inner ring support platform of the manhole base 1 has three countersunk holes 2 evenly distributed at 120° intervals; the countersunk holes contain threaded wires; prefabricated double-ended bolts 3; the bottom threads 31 of the bolts match the threads of the threaded wires in the countersunk holes 2; the middle of the double-ended bolts has a cylindrical platform 32 and a washer 33, which match the countersunk holes 2; when installing the manhole cover 4, first screw the double-ended bolts 3 into the countersunk holes 2, keeping the upper surface of the washer 33 flush with the support surface of the manhole base 1; the manhole cover 4 has three countersunk holes 41 at corresponding positions to the manhole base 1, and the manhole cover 4 is threaded through the double-ended bolts 3 and fastened onto the manhole base 1, according to the manhole cover... 4. For on-site matching with the manhole cover 1, adjust the lower-side double-ended bolt 3 so that the plane of the manhole cover 4 is flush with the upper edge of the manhole cover 1. This is done by tightening the hexagonal 34 at the top of the double-ended bolt 3 to lift and level the manhole cover 4. Then, use the nut 35, which matches the thread on the top of the double-ended bolt 3, to lock the manhole cover. The top of the nut 35 should be slightly lower than the surface of the manhole cover 4. Finally, fill the structural gaps between the manhole cover 4 and the manhole cover 1, as well as at the countersunk nut of the manhole cover, with foam rubber. This ensures a tight seal to prevent water vapor and dust intrusion, and also enhances the shock absorption and buffering performance of the integrated manhole cover and base. When it is necessary to open the manhole cover, first scrape off the foam rubber around the nut 35, then loosen and remove the nut 35. Use an Allen wrench to tighten the double-ended bolt 3 sequentially upwards to pull it out. Because the support structure of the manhole cover 4 and the manhole base 1 is a frustum-shaped structure, there is no obstruction from debris or debris in the gaps, so the manhole cover can be easily and evenly lifted and opened.

Claims

1. A manhole cover that can be leveled, tightened, and lifted for release, comprising a manhole base (1) and a manhole cover (4); characterized in that, The well seat (1) is annular, and multiple well seat countersunk holes (2) are opened on the annular surface of the well seat (1). The well cover (4) is also opened with well cover countersunk holes (41) that correspond one-to-one with the well seat countersunk holes (2) and penetrate the well cover (4) vertically. It also includes a double-ended bolt (3). The well seat countersunk hole (2) has an internal thread. The lower part of the double-ended bolt (3) has an external thread and is screwed into the well seat countersunk hole (2). A cylindrical platform (32) is fixed in the middle of the double-ended bolt (3). The upper part of the double-ended bolt (3) extends into the well cover countersunk hole (41) and the cylindrical platform (32) contacts the bottom surface of the well cover (4). The top of the double-ended bolt (3) has an internal hexagon (34) facing downward. The double-ended bolt (3) has an external thread and a nut (35) near the top.

2. The manhole cover as described in claim 1, characterized in that, The outer side of the ring surface of the well seat (1) is a convex cone structure with a larger upper part and a smaller lower part. The middle section of the ring surface is a horizontal structure. The countersunk hole (2) of the well seat is opened on the middle section of the ring surface. The inner side of the ring surface is a vertically convex truncated cone structure. The outer side of the well cover (4) is a convex cone structure with a larger upper part and a smaller lower part. The outer perimeter of the bottom surface of the well cover (4) is a horizontal section corresponding to the middle section of the ring surface of the well seat (1). The inner side of the horizontal section is a vertical section. The top of the vertical section extends inward and upward. The top of the extended section becomes horizontal again. The countersunk hole (41) of the well cover is opened on the horizontal section of the well cover (4) and penetrates the well cover (4) upward.

3. A manhole cover that can be leveled, tightened, and lifted for release as described in claim 2, characterized in that, The double-ended bolt (3) is fitted with a washer (33) above the cylindrical platform (32).

4. A manhole cover that can be leveled, tightened, and lifted for release, as described in any one of claims 1-3, characterized in that... There are three countersunk holes (2) around the center of the well seat (1) at equal intervals; there are also three countersunk holes (41) around the center of the well cover (4) at equal intervals.

5. A manhole cover that can be leveled, tightened, and lifted for release, as described in any one of claims 1-3, characterized in that... Foam rubber is filled in the structural gaps between the manhole cover (4) and the manhole seat (1) and between the manhole cover countersunk hole (41) and the nut (35).

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