Pre-buried manhole cover

Abstract

The utility model is suitable for building equipment technical field provides a kind of pre -buried manhole cover, it includes: the cylinder of pre -buried in predetermined position;Cylinder cover is rotatably connected on the lateral wall of the cylinder, auxiliary support assembly is equipped between the cylinder cover and the cylinder, the auxiliary support assembly includes the active support rod and auxiliary support rod rotatably connected each other, one end of active support rod is rotatably connected in the inside of the cylinder, one end of the auxiliary support rod is rotatably connected in the bottom of the cylinder cover, the auxiliary support assembly assists cylinder cover to open and close on the cylinder, by this, the utility model is provided with a kind of pre -buried cylinder cover structure, reduce the complicated situation of engineering in the process of formwork and formwork dismantling, auxiliary structure is provided simultaneously, it is convenient to open and close and post-maintenance to cylinder cover.

Description

Technical Field

[0001] This utility model relates to the field of building equipment technology, and in particular to a pre-embedded manhole cover. Background Technology

[0002] Manholes are perforations constructed during building construction, often pre-installed during the building's construction phase. Important structures typically include roof manholes. Roof manholes allow personnel to access the upper part of the building's roof for maintenance work, facilitating inspection, cleaning, repair, and replacement. This design not only facilitates routine inspection and maintenance but also serves as a passageway in emergencies.

[0003] Extensive engineering practice shows that the current construction method for manholes on roofs generally involves setting up formwork and pre-drilling holes during the main construction phase. After removing the formwork, a manhole cover is installed for maintenance. During construction and maintenance, workers use scaffolding or ladders to push open the cover from bottom to top to enter the manhole for inspection. This current construction method mainly causes the following problems: 1) The formwork erection and dismantling process is cumbersome, and the quality of the formwork reinforcement is difficult to guarantee, often resulting in deformation and grout leakage; 2) Without reliable reinforcement measures after the template is positioned, the reserved hole position is prone to displacement; 3) The height of the maintenance access manholes from the ground is generally high. When workers enter the chamber from the bottom up, they often encounter situations where the cylinder cover is heavy and difficult to open, or where it is inconvenient for maintenance personnel to enter after it is opened.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this utility model is to provide a pre-embedded manhole cover, which reduces the complexity of engineering work during formwork erection and dismantling by setting a pre-embedded cover structure. At the same time, an auxiliary structure is provided to facilitate the opening and closing of the cover and subsequent maintenance.

[0006] To achieve the above objectives, this utility model provides a pre-embedded manhole cover, comprising: A cylindrical body pre-embedded in a predetermined location; A cylinder cover is rotatably connected to the side wall of the cylinder body. An auxiliary support assembly is provided between the cylinder cover and the cylinder body. The auxiliary support assembly includes an active support rod and an auxiliary support rod that are rotatably connected to each other. One end of the active support rod is rotatably connected to the inside of the cylinder body, and one end of the auxiliary support rod is rotatably connected to the bottom of the cylinder cover. The auxiliary support assembly assists the cylinder cover in opening and closing on the cylinder body.

[0007] In one embodiment, a mounting seat is provided on one side of the cylinder body, and a mounting rod is provided on one side of the cylinder cover opposite to the mounting seat, the mounting rod being rotatably connected to the mounting seat.

[0008] In one embodiment, a driving component is provided inside the cylinder, and the output end of the driving component is fixed to one end of the active support rod. The driving component drives the active support rod to rotate, further assisting in the opening and closing of the cylinder cover.

[0009] In one embodiment, the driving component is a gas spring or a torsion bar spring. The driving component includes a housing and a sliding shaft slidably connected within the housing. A rack is provided on the sliding shaft. The output shaft of the driving component is rotatably connected to the housing. A gear that meshes with the rack is provided on the output shaft. The gas spring or torsion bar spring drives the sliding shaft to slide.

[0010] In one embodiment, the auxiliary support rod includes: A support sleeve is rotatably connected to the active support rod, and an adjusting nut is rotatably connected to the front end of the support sleeve; Rotate the threaded rod connected to the inner side of the cylinder cover. The threaded rod is inserted into the inside of the support sleeve and screwed to the adjusting nut. Adjust the adjusting nut to adjust the position of the support sleeve and the threaded rod.

[0011] In one embodiment, the adjusting nut has a rotating protrusion on one side, and the support sleeve has a rotating hole corresponding to the rotating protrusion.

[0012] In one embodiment, the cylinder is embedded in a predetermined position. The cylinder includes a column and upper and lower limit positions disposed at the upper and lower ends of the column. The lower limit position is welded or flanged to the predetermined position.

[0013] In one embodiment, the top of the upper limit position is provided with a mating groove, the cylinder cover fits into the mating groove, and the bottom of the cylinder cover is provided with a chamfer.

[0014] This utility model provides a pre-embedded manhole cover, comprising: The pre-embedded cylinder at a predetermined position ensures that the cylinder and concrete can be formed simultaneously during the later pouring process, reducing secondary construction and achieving rapid forming of the cylinder and fixed position of the manhole. A cylinder cover is rotatably connected to the side wall of the cylinder body, sealing the hole at the top of the cylinder body. An auxiliary support assembly is provided between the cylinder cover and the cylinder body, providing support for the cylinder cover and enabling support and control when the cylinder cover is opened and closed. The auxiliary support assembly includes an active support rod and an auxiliary support rod rotatably connected to each other, achieving the support effect for the cylinder cover. One end of the active support rod is rotatably connected to the inside of the cylinder body, and one end of the auxiliary support rod is rotatably connected to the bottom of the cylinder cover. The auxiliary support assembly assists the cylinder cover in opening and closing on the cylinder body, reducing the difficulty of manual opening and ensuring the effectiveness of the cylinder cover opening and closing.

[0015] In summary, the technical effects achieved by this utility model are: 1. It can be pre-embedded in one piece before concrete pouring, and the inspection and access manhole cylinder can be used instead of formwork. The process is simple, the construction efficiency is improved, no secondary construction is required, the integrity of the structure is increased, and the construction quality is guaranteed. 2. By installing a foldable auxiliary support device, it is easy for maintenance personnel to open the cylinder cover. The opening angle of the cylinder cover can also be fixed to facilitate the safe entry of maintenance personnel. After the maintenance personnel exit the cylinder, the cylinder cover can be pulled down by the support rod, which greatly facilitates the entry and exit of personnel. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the open state of this utility model; Figure 2 This is a three-dimensional structural diagram of the closed state of this utility model; Figure 3 This is a three-dimensional structural diagram of the cap of this utility model; Figure 4 This is a schematic diagram of the three-dimensional structure of the cylindrical body of this utility model; Figure 5 This is a three-dimensional structural diagram of the auxiliary support rod of this utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the auxiliary support rod of this utility model; In the diagram, 1-cylinder cover, 11-hinge seat, 12-mounting rod, 13-handrail, 2-cylinder body, 21-lower limit, 22-column, 23-upper limit, 24-mounting groove, 25-mounting seat, 26-output shaft, 27-drive component, 3-active support rod, 4-auxiliary support rod, 41-threaded rod, 42-threaded part, 43-adjusting nut, 44-support sleeve, 45-rotating convex edge, 46-sliding hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0019] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0020] See Figure 1 Figure 2 and Figure 3 This utility model provides a pre-embedded manhole cover, which includes a cylinder 2 pre-embedded in a predetermined position. By pre-embedding the cylinder 2 in the predetermined position before concrete pouring, it is ensured that the cylinder 2 and the concrete can be formed synchronously during the later pouring, reducing secondary construction and realizing the rapid forming of the cylinder 2 and the fixed position of the manhole. A cylinder cover 1 is rotatably connected to the side wall of the cylinder 2, sealing the hole at the top of the cylinder 2. An auxiliary support assembly is provided between the cylinder cover 1 and the cylinder 2, providing support for the cylinder cover 1 and supporting and controlling its opening and closing. The auxiliary support assembly includes an active support rod 3 and an auxiliary support rod 4 rotatably connected to each other. The auxiliary support rod 4 is connected to a hinge seat 11 on the cylinder cover 1, providing support for the cylinder cover 1. One end of the active support rod 3 is rotatably connected to the inside of the cylinder 2, and one end of the auxiliary support rod 4 is rotatably connected to the bottom of the cylinder cover 1. The auxiliary support assembly assists the cylinder cover 1 in opening and closing on the cylinder 2, reducing the difficulty of manual opening and ensuring the effectiveness of opening and closing the cylinder cover 1.

[0021] Specifically, in order to ensure the opening and closing of the cylinder cover 1, an operating handle 13 can be provided on the top of the cylinder cover 1. At the same time, a mounting base 25 is provided on one side of the cylinder body 2, and a mounting rod 12 is provided on one side of the cylinder cover 1, which is opposite to the mounting base 25. The mounting rod 12 is rotatably connected to the mounting base 25. In order to ensure the fixing effect of the cylinder cover 1, a switch lock can also be provided on the cylinder cover 1 (existing technology, not described in detail). The cylinder cover 1 and the cylinder body 2 are locked and fixed by the switch lock.

[0022] In one embodiment, combined with Figure 4 In order to achieve the auxiliary support effect for the cylinder body 2 and the cylinder cover 1, the cylinder body 2 is provided with a driving component 27. The output end of the driving component 27 is fixed to one end of the active support rod 3. The driving component 27 drives the active support rod 3 to rotate to further assist the opening and closing of the cylinder cover 1, so as to ensure that when the cylinder cover 1 is opened or closed to a certain extent, it can assist in supporting the position of the cylinder cover 1, thereby fixing the opening and closing angle of the cylinder cover 1.

[0023] In a specific implementation, in order to fix the position of the driving component 27, the driving component 27 is a structure with auxiliary telescopic function such as a gas spring or a torsion bar spring (existing technology, not exemplified here). The driving component 27 includes a housing and a sliding shaft slidably connected to the housing. A rack is provided on the sliding shaft. The output shaft 26 of the driving component 27 is rotatably connected to the housing. A gear that meshes with the rack is provided on the output shaft 26. By sliding the sliding shaft, the gear is driven to rotate, which in turn drives the output shaft 26 to rotate, further adjusting the active support rod 3, thereby adjusting the position of the cylinder cover 1. The gas spring or torsion bar spring drives the sliding shaft to slide.

[0024] In one embodiment, see Figure 5 and Figure 6 The auxiliary support rod 4 includes: A support sleeve 44 is rotatably connected to the active support rod 3, and an adjusting nut 43 is rotatably connected to the front end of the support sleeve 44, so that the adjusting nut 43 can only rotate on the support sleeve 44 without moving. Rotate the threaded rod 41 connected to the inner side of the cylinder cover 1. The threaded part 42 of the threaded rod 41 is inserted into the sliding hole 46 inside the support sleeve to ensure that the position of the threaded rod 41 is adjustable. The threaded rod 41 is inserted into the inside of the support sleeve 44 and screwed to the adjusting nut 43. Adjust the adjusting nut 43 to adjust the position of the support sleeve 44 and the threaded rod 41.

[0025] Specifically, in order to ensure the adjustment of the length of the auxiliary support rod 4, the adjusting nut 43 is provided with a rotating protrusion 45 on one side, and the support sleeve 44 is provided with a rotating hole corresponding to the rotating protrusion 45, so that the adjusting nut 43 can rotate relative to the support sleeve 44 at this time, and the support sleeve 44 moves synchronously by moving the adjusting nut 43.

[0026] In one embodiment, in order to install and fix the cylinder 2, the cylinder 2 is embedded into a predetermined position. The cylinder 2 includes a column 22 and an upper limit position 23 and a lower limit position 21 disposed at the upper and lower ends of the column 22. The lower limit position 21 is welded or flanged to the predetermined position. The top of the upper limit position 23 is provided with a mating groove. The cylinder cover 1 fits into the mating groove. The bottom of the cylinder cover 1 is provided with a chamfer to ensure the normal sealing and installation effect of the cylinder cover 1 and the cylinder 2.

[0027] During the processing, the main structure of the integrated roof manhole consists of a stainless steel cylinder 2, a cylinder cover 1, auxiliary support components, a switch lock, etc. The specific dimensions can be adjusted according to the actual site conditions. The manhole cylinder 2 and cylinder cover 1 are cut and welded from 304 stainless steel. The door hinge, handrail 13 and other accessories are cut and made from 3mm thick 304 stainless steel.

[0028] First, weld the stiffening ribs to the upper and lower ends of the cylinder 2. After confirming that the positions are correct, perform full welding using argon arc welding. The number of welding layers is generally 2 to 3, with single-sided welding and double-sided forming. If misalignment is caused by insufficient roundness, tap weld while hammering with a wooden mallet to flatten it before spot welding to fix it. The spacing between the fixing welds should be approximately 20mm to 30mm.

[0029] Determine the position of the central axis of the cylinder cover 1 and cylinder body 2, and weld the opening door hinges symmetrically along the central axis on the edges of the cylinder cover 1 and cylinder body 2.

[0030] Weld handrail 13 and switch lock along the central axis. During welding, first use spot welding for temporary fixation to minimize lateral swaying.

[0031] Insert the cotter pin into the door hinge, then separate the two legs and roll it up onto the round pin or shaft, making the arc surface of the forked part parallel to the arc surface of the pin or shaft, and as close as possible to the round pin or shaft.

[0032] After installation, check that all fixing screws are tight and that there are no loose or insecure parts. Open the cylinder cover 1 to its maximum opening position and check whether the support rod of the auxiliary support assembly is touching or rubbing against the cylinder body 2.

[0033] Based on the structural construction drawings, determine the geometric dimensions and locations, and mark the bottom of the template with red paint to facilitate the pre-embedding of manholes for subsequent maintenance.

[0034] Pre-installation of maintenance access manholes: (1) Lay out the lines according to the drawing and leave positioning holes; (2) Place the cylinder 2 on the bottom mold according to the predetermined position, and insert the positioning steel bars into the positioning holes; (3) Verify again whether the positioning of cylinder 2 has changed. If cylinder 2 is displaced or loosened, it should be adjusted in time.

[0035] After the inspection hole is properly installed, concrete is poured. Once the inspection hole is completely filled with concrete, the surface is cured promptly. A mulch film is then placed over the inspection hole to prevent cement mortar from contaminating it.

[0036] After the inspection hole is installed and adjusted, and passes the acceptance inspection by the relevant unit, it can be used for trial. The debugging process is as follows: first, observe whether the auxiliary support component is firmly fixed; observe whether the connecting rod of the auxiliary support component rubs against the cylinder 2 or the cylinder cover 1; observe whether the opening force is appropriate; and observe whether the opening angle can be fixed.

[0037] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A pre-embedded manhole cover, characterized in that, include: A cylindrical body pre-embedded in a predetermined location; A cylinder cover is rotatably connected to the side wall of the cylinder body. An auxiliary support assembly is provided between the cylinder cover and the cylinder body. The auxiliary support assembly includes an active support rod and an auxiliary support rod that are rotatably connected to each other. One end of the active support rod is rotatably connected to the inside of the cylinder body, and one end of the auxiliary support rod is rotatably connected to the bottom of the cylinder cover. The auxiliary support assembly assists the cylinder cover in opening and closing on the cylinder body.

2. The pre-embedded manhole cover according to claim 1, characterized in that, A mounting base is provided on one side of the cylinder body, and a mounting rod is provided on one side of the cylinder cover, which is opposite to the mounting base. The mounting rod is rotatably connected to the mounting base.

3. The pre-embedded manhole cover according to claim 1, characterized in that, The cylinder is equipped with a driving component inside. The output end of the driving component is fixed to one end of the active support rod. The driving component drives the active support rod to rotate, further assisting in the opening and closing of the cylinder cover.

4. The pre-embedded manhole cover according to claim 3, characterized in that, The driving component is a gas spring or a torsion bar spring. The driving component includes a housing and a sliding shaft slidably connected within the housing. A rack is provided on the sliding shaft. The output shaft of the driving component is rotatably connected to the housing. A gear that meshes with the rack is provided on the output shaft. The gas spring or torsion bar spring drives the sliding shaft to slide.

5. The pre-embedded manhole cover according to claim 1, characterized in that, The auxiliary support rod includes: A support sleeve is rotatably connected to the active support rod, and an adjusting nut is rotatably connected to the front end of the support sleeve; Rotate the threaded rod connected to the inner side of the cylinder cover. The threaded rod is inserted into the inside of the support sleeve and screwed to the adjusting nut. Adjust the adjusting nut to adjust the position of the support sleeve and the threaded rod.

6. The pre-embedded manhole cover according to claim 5, characterized in that, The adjusting nut has a rotating protrusion on one side, and the support sleeve has a rotating hole corresponding to the rotating protrusion.

7. The pre-embedded manhole cover according to claim 1, characterized in that, The cylinder is embedded in a predetermined position. The cylinder includes a column and upper and lower limit positions disposed at the upper and lower ends of the column. The lower limit position is welded or installed into the predetermined position by a flange.

8. The pre-embedded manhole cover according to claim 7, characterized in that, The upper limit position has a mating groove at its top, the cylinder cover fits into the mating groove, and the bottom of the cylinder cover has a chamfer.

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