Manhole cover plate

Abstract

The utility model discloses a manhole cover plate, and relates to the field of bridge construction. A manhole cover plate comprises a mounting plate, and a combined cover plate is arranged on the mounting plate. Wherein the combined cover plate comprises a first cover plate, first locking pieces, a second cover plate and second locking pieces, and the first locking pieces are arranged at the two ends of the first cover plate and used for controlling opening and closing of the first cover plate; a second cover plate is arranged in the center of the first cover plate, and second locking pieces are arranged at the two ends of the second cover plate. The area of the first cover plate is larger than that of the second cover plate, and a worker can flexibly select to open the first cover plate or the second cover plate according to different sizes of tools carried by the worker in actual use. And after being locked and fixed, the first cover plate and the second cover plate cannot shake up and down, so that the sealing performance and the stability are improved, and meanwhile, the safety of workers is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction, in particular to a manhole cover plate. Background Art

[0002] A manhole is an opening structure used for personnel to enter and exit equipment for installation, maintenance and safety inspection. It has the advantages of flexible opening and closing, safe fire resistance, and compact structure. The cover plate, enclosure plate and seat ring of the manhole cover are usually made of hot-rolled carbon steel or the same material as the hull structure where the manhole cover is installed. When selecting and arranging manhole covers, in addition to complying with the provisions of relevant conventions, rules and specifications, strength, purpose and ease of use should also be considered. At present, when the manhole cover plate of the continuous beam is locked with a lock, there is a gap between the cover plate and the lock hole, and the cover plate will slide down and not fit tightly against the bottom surface of the beam, resulting in poor sealing of the cover plate and shortening the service life of the cover plate.

[0003] Therefore, we urgently need to design a manhole cover based on actual usage needs and referring to mechanical principles; we strive to make it labor-saving and convenient to use, so as to improve the work efficiency of staff, reduce workload, and increase the service life of the cover.

[0004] For example, in the Chinese patent number CN 207032313 U, a manhole cover is disclosed, including a cover, a handle and a limiting mechanism for fixing the cover, the lower part of the cover is provided with a lower edge that matches the manhole, the handle includes a handle body and a handle fixing frame, the handle fixing frame is arranged on the cover, the handle body and the handle fixing frame are arranged in a movable connection, and the limiting mechanism is arranged on the cover. By setting the handle to be detachable, the area of ​​the upper part of the cover can be reduced, the possibility of collision can be reduced, and at the same time, a detachable handle can be used for multiple cover plates.

[0005] However, the manhole cover in the above patent still has the following defects:

[0006] (1) There are no covers of different sizes for the staff to use. When the staff open and close the covers, they cannot choose to open covers of different sizes according to the actual situation, which is inconvenient for the staff to use.

[0007] (2) When fixing the cover plate, the hook at the bottom of the handle needs to be inserted into the lifting ring, and the handle is turned. The lifting ring rotates accordingly, driving the limiting rod at the bottom of the rotating shaft to rotate, and the rotating rod rotates into the limiting groove on the inner wall. The whole process is rather cumbersome, and it is inconvenient for the staff to observe the positional relationship between the rotating rod and the limiting rod. It is not conducive to saving the staff's physical strength and improving efficiency. Utility Model Content

[0008] In order to solve the problems that the cover in the prior art has poor sealing performance and cannot choose to open covers of different sizes according to actual conditions, the utility model improves the structure of the manhole cover for the continuous beam on the basis of the original technology, so that the locking operation of the manhole cover is more flexible and convenient to use, and covers of different sizes can be chosen to be opened according to specific circumstances. The design is more user-friendly and convenient for the staff to use and fix.

[0009] The technical idea of ​​the utility model is:

[0010] (1) The first cover plate and the second cover plate of different sizes and shapes are provided, and the first cover plate or the second cover plate can be opened according to various situations encountered in actual construction.

[0011] (2) A first locking assembly is provided for locking the first cover plate, and a second locking assembly is provided for locking the second cover plate. Both the first locking assembly and the second locking assembly are exposed to the outside, so that the staff can observe whether the locking is compact and reliable, and the operation is simple and convenient for the staff.

[0012] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model to solve its technical problems is:

[0013] A manhole cover comprises a mounting plate, on which a combined cover is arranged; wherein the combined cover comprises a first cover, a first locking member, a second cover and a second locking member, wherein the first locking member is arranged at both ends of the first cover for controlling the opening and closing of the first cover; a second cover is arranged at the center of the first cover, and second locking members are arranged at both ends of the second cover.

[0014] In order to facilitate the staff to select cover plates of different sizes according to actual conditions, a further optimization scheme of the utility model is as follows: the first cover plate has a cylindrical front end and a rectangular parallelepiped structure at the rear end, and the cylinder and the rectangular parallelepiped are formed as one piece.

[0015] On the basis of the above solution, the first locking component is a connecting block and a locking block arranged at the front end of the first cover plate and a hinge arranged at the rear end of the first cover plate.

[0016] Furthermore, clamping plates for fixing the clamping blocks are symmetrically arranged on the mounting plate.

[0017] In order to enable the staff to fix the first cover plate conveniently and quickly, locking pieces are provided on the clamping plate and the clamping block.

[0018] The most preferred solution of the utility model is: the second locking component includes a column, a connecting column, a fixed column and a positioning screw, the front end of the connecting column is rotatably connected to the column, the middle end of the connecting column is fixedly connected to the top surface of the second cover plate, and the rear end of the connecting column is threadedly connected to the fixed column through the positioning screw.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) When in use, the worker is located under the manhole cover, whether closing or opening the manhole cover. The worker needs to raise his hand to open or fix the first locking member or the second locking member, so the first locking member and the second locking member are exposed to the outside, which is convenient for the worker to observe and easy to operate, thereby reducing the physical burden on the worker and improving work efficiency.

[0021] (2) A first cover plate and a second cover plate are provided. The area and weight of the second cover plate are smaller than those of the first cover plate. Therefore, the structures adopted by the corresponding first locking member and the second locking member are different, thereby ensuring that both the first cover plate and the second cover plate have a good fixing effect. In actual work, the staff can flexibly choose to open the first cover plate or the second cover plate according to different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of a manhole cover plate of the utility model;

[0024] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0025] Figure 3 yes Figure 1 Left view of

[0026] Figure 4 This is a structural diagram of a locking member installed on a manhole cover of the utility model;

[0027] Figure 5 yes Figure 4 main view.

[0028] In the figure: 1. mounting plate; 101. mounting hole; 2. first cover plate; 3. hinge; 4. connecting block; 401. clamping plate; 402. clamping block; 403. through hole; 404. positioning pin; 5. column; 501. rotating shaft; 6. connecting column; 7. fixing column; 701. positioning screw; 8. second cover plate. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning. Example 1

[0033] like Figures 1 to 5 As shown, the utility model discloses a manhole cover, including a mounting plate 1, the mounting plate 1 is a cylindrical structure, and mounting holes 101 are arranged on the mounting plate 1 at equal angular intervals along the radial direction, and the angular interval between two adjacent mounting holes 101 is 60°. In this embodiment, the number of mounting holes 101 is set to 6, and the number thereof in actual use can be flexibly set, and mounting bolts are arranged in the mounting holes 101 for fixing the mounting plate 1 to the manhole flange.

[0034] A combined cover is provided on the mounting plate 1; the combined cover comprises a first cover 2, a first locking member, a second cover 8 and a second locking member, wherein the first locking member is provided at both ends of the first cover 2 for controlling the opening and closing of the first cover 2; a second cover 8 is provided at the center of the first cover 2, and second locking members are provided at both ends of the second cover 8, and the second locking members are used to lock the second cover 8.

[0035] Specifically, the first cover plate 2 is a structure with a cylindrical front end and a rectangular parallelepiped at the rear end, and the cylindrical and rectangular parallelepiped are designed as an integral whole. The second cover plate 8 is a cylindrical top surface protruding upward to form a round head shape, and its shape is similar to a pot cover, and is located at the center of the first cover plate 2. The area of ​​the first cover plate 2 is larger than that of the second cover plate 8, so the weight of the first cover plate 2 is greater than that of the second cover plate 8. Therefore, in the design of controlling the opening and closing of the first cover plate 2 and the second cover plate 8, the designs of the first locking member and the second locking member used are different.

[0036] The first locking member is a connecting block 4 and a snap-fit ​​block 402 arranged at the front end of the first cover plate 2, and a hinge 3 arranged at the rear end of the first cover plate 2. The connecting block 1 is fixedly connected to the snap-fit ​​block 402. The hinge 3 is arranged at the rectangular structure at the rear end of the first cover plate 2, and two hinges are arranged at equal intervals, which are used to rotatably connect the mounting plate 1 and the first cover plate 2. Two card plates 401 for fixing the snap-fit ​​block 402 are symmetrically arranged on the mounting plate 1. When the first cover plate 2 needs to be closed, when the first cover plate 2 is close to the mounting plate 1, the snap-fit ​​block 402 will be placed in the middle of the two card plates 401, and through holes 403 are arranged on both the snap-fit ​​block 402 and the card plate 401.

[0037] In order to make it convenient and quick for the staff to fix the first cover plate 2, the first cover plate 2 can be closely fitted to the mounting plate 1 without any gaps and the first cover plate 2 shaking up and down, provided that the through hole 403 provided on the clamping block 402 and the clamping plate 401 remain coaxial. Therefore, locking pieces are provided on the clamping plate 401 and the clamping block 402.

[0038] In this embodiment, the locking member adopts a positioning pin 404, and the positioning pin 404 is inserted into the through hole 403, passing through the card plate 401 and the locking block 402, so that the through hole 403 remains coaxial, which can not only ensure the sealing of the first cover plate 2, but also make it very convenient for the staff to remove the positioning pin 404 when it is necessary to open the first cover plate 2, thereby saving time.

[0039] The technical solutions of the locking parts include but are not limited to locks, latch-type fixing buckles, etc. It only needs to ensure that when locked, the locking block 402 and the through hole 403 on the card plate 401 remain coaxial.

[0040] The most preferred solution of the utility model is: the second locking member includes a column 5, a connecting column 6, a fixing column 7 and a positioning screw 701, the front end of the connecting column 6 is rotatably connected to the column 5 through a rotating shaft 501, the middle end of the connecting column 6 is fixedly connected to the top surface of the second cover plate 8, and the rear end of the connecting column 6 is threadedly connected to the fixing column 7 through the positioning screw 701. When the positioning screw 701 is rotated and the threaded connection with the fixing column 7 is kept tight, the second cover plate 8 is tightly fitted with the first cover plate 2, and when the second cover plate 8 needs to be opened, the positioning screw 701 can be loosened.

[0041] Example 2 Application Case

[0042] This embodiment describes the application of the utility model in the field of bridge construction. When the staff needs to carry a smaller tool through the manhole, they only need to loosen the positioning screw 701 so that the positioning screw 701 is separated from the fixing column 7, and the second cover plate 8 can be opened through the connecting column 6. When the staff needs to carry a larger tool through the manhole, the positioning pin 404 is removed from one end of the through hole 403, and the locking block 402 is pulled open to open the first cover plate 2. Since the first cover plate 2 and the second cover plate 8 are of different sizes, in actual use, the staff can make a specific analysis on a case-by-case basis to choose whether to open the first cover plate 2 or the second cover plate 8.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A manhole cover, comprising a mounting plate (1), characterized in that: A combined cover plate is arranged on the mounting plate (1); The combined cover plate comprises a first cover plate (2), a first locking member, a second cover plate (8) and a second locking member, wherein the first locking member is arranged at both ends of the first cover plate (2) and is used to control the opening and closing of the first cover plate (2); the second cover plate (8) is arranged at the center of the first cover plate (2), and the second locking members are arranged at both ends of the second cover plate (8).

2. A manhole cover according to claim 1, characterized in that: The first cover plate (2) has a cylindrical front end and a rectangular parallelepiped structure at the rear end, and the cylinder and the rectangular parallelepiped are formed as one piece.

3. A manhole cover according to claim 2, characterized in that: The first locking component comprises a connecting block (4) and a locking block (402) arranged at the front end of the first cover plate (2), and a hinge (3) arranged at the rear end of the first cover plate (2).

4. A manhole cover according to claim 3, characterized in that: A clamping plate (401) for fixing the clamping block (402) is symmetrically arranged on the mounting plate (1).

5. A manhole cover according to claim 4, characterized in that: Locking pieces are provided on the clamping plate (401) and the clamping block (402).

6. The manhole cover according to claim 1, characterized in that: The second locking component comprises a column (5), a connecting column (6), a fixing column (7) and a positioning screw (701); the front end of the connecting column (6) is rotatably connected to the column (5); the middle end of the connecting column (6) is fixedly connected to the top surface of the second cover plate (8); and the rear end of the connecting column (6) is threadedly connected to the fixing column (7) via the positioning screw (701).

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