Manhole cover elevation control device and control method

Abstract

The application relates to the technical field of municipal road construction auxiliary equipment, and discloses a well lid elevation control device and a control method, which comprises the following: an annular bearing frame; three or more support columns, which are uniformly arranged on the outer periphery of the annular bearing frame, and are provided with a first sliding channel in the vertical direction on the inner side, a second sliding channel in the vertical direction on the outer side, a first limiting strip hole in the vertical direction on the front side and communicated with the first sliding channel, and a second limiting strip hole in the vertical direction on the front side and communicated with the second sliding channel; a support rod, one end of which is slidably arranged in the first sliding channel, and the other end of which is supported below the annular bearing frame; a measuring rod, one end of which is slidably arranged in the second sliding channel; a first limiting screw, one end of which passes through the first limiting strip hole and the support rod and is tightly abutted against the side wall of the first sliding channel; a second limiting screw, one end of which passes through the second limiting strip hole and the measuring rod and is tightly abutted against the side wall of the second sliding channel; and a scale line, which is arranged on the front side of the support column. The device can quickly and accurately adjust the well lid elevation, and stably fix the well lid after the adjustment is completed.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for municipal road construction, specifically to a manhole cover elevation control device and control method. Background Technology

[0002] During the construction of municipal roads, the accuracy of controlling the elevation of manhole covers directly affects the smoothness of the road and the driving comfort of vehicles. Therefore, manhole cover elevation control is an important procedure in road construction.

[0003] In current manhole cover construction, the elevation of the manhole cover is usually determined by manual measurement and adjustment. This method is easily affected by factors such as the operator's experience and the construction environment, resulting in insufficient precision in controlling the manhole cover elevation. This makes it difficult to meet construction specifications, which in turn affects road smoothness and reduces vehicle driving comfort. Furthermore, current construction methods often require repeated measurement and adjustment of the manhole cover position, leading to low construction efficiency. Additionally, the lack of auxiliary devices that can achieve one-time positioning and stable fixing of the manhole cover further hinders the improvement of manhole cover installation quality and construction efficiency. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides a manhole cover elevation control device and method. This device can quickly and accurately adjust the manhole cover elevation and stably fix the manhole cover after adjustment, thereby improving the installation accuracy and construction efficiency of the manhole cover and ensuring the quality of road construction.

[0005] According to one embodiment of the present invention, a manhole cover elevation control device is provided, comprising: an annular support frame; three or more support columns evenly arranged on the outer periphery of the annular support frame, a first slide rail provided vertically on the inner side, a second slide rail provided vertically on the outer side, and a first limiting strip hole communicating with the first slide rail and a second limiting strip hole communicating with the second slide rail on the front side; a support rod, one end of which is slidably disposed in the first slide rail, and the other end of which is supported below the annular support frame; a measuring rod, one end of which is slidably disposed in the second slide rail; a first limiting screw, one end of which passes through the first limiting strip hole and the support rod and abuts against the side wall of the first slide rail; a second limiting screw, one end of which passes through the second limiting strip hole and the measuring rod and abuts against the side wall of the second slide rail; and a scale line provided on the front side of the support column.

[0006] In one implementation, four support columns are provided.

[0007] In one embodiment, the opening width on the side of the first slide is smaller than the width inside the first slide; the cross-section of the support rod is T-shaped.

[0008] In one embodiment, the longitudinal section of the support rod is T-shaped.

[0009] In one embodiment, two first limiting screws are provided through the support rod.

[0010] In one embodiment, the upper end of the support rod is connected to a traction rod, which is vertically positioned in the first slide rail.

[0011] In one embodiment, the opening width on the side of the second slide is smaller than the width inside the second slide; the cross-section of the measuring rod is T-shaped.

[0012] In one embodiment, the longitudinal section of the measuring rod is T-shaped.

[0013] In one embodiment, the annular support frame includes two semi-circular frame bodies connected together by hinges.

[0014] As one implementation, the bottom of the support column is provided with casters.

[0015] According to one embodiment of the present invention, a method for controlling the elevation of a manhole cover is provided, applied to the manhole cover elevation control device as described above, comprising the following steps: S1, fixing the manhole cover in a ring-shaped support frame, and moving the control device to the manhole cover installation position; S2, adjusting the height of the measuring rod near the curb stone so that its lower side is in contact with the top surface of the curb stone, and adjusting the height of other measuring rods so that all measuring rods in the control device have the same height; S3, adjusting the height of all support rods according to the elevation difference between the manhole cover and the curb stone and fixing them with the first limit screw so that the height of the manhole cover meets the design elevation.

[0016] As described above and through practical application, the manhole cover elevation control device of this invention determines the reference elevation of the top surface of the curbstone using a measuring rod, and synchronously adjusts the support rod according to the elevation difference between the manhole cover and the curbstone. This allows for quick and accurate determination of the manhole cover's installation elevation, avoiding the accumulation of errors caused by repeated manual measurements and trial installations, and improving the control accuracy of the manhole cover elevation. The device uses scale lines on the front side of the support column, allowing construction personnel to visually read the relative positions of the measuring rod and support rod in the slide rail. This facilitates uniform leveling of the support rods and measuring rods on multiple support columns, ensuring the entire annular load-bearing frame is horizontal and preventing local tilting after installation. The device uses first and second limit screws to lock the support rod and measuring rod in the slide rail, providing stable support for the manhole cover after elevation adjustment and preventing displacement or settlement during subsequent road construction.

[0017] This manhole cover elevation control method uses the top surface elevation of the curbstone as a unified leveling benchmark. It separates the adjustment of the measuring rod from the adjustment of the support rod, ensuring that they do not interfere with each other. First, a horizontal reference surface is established using the measuring rod, and then the support rod is adjusted synchronously according to the design elevation difference. This simplifies the process of determining and adjusting the manhole cover elevation, enabling different construction personnel to complete the elevation control based on a unified benchmark and steps. It reduces the reliance on the operational experience of construction personnel and ensures the consistency of manhole cover elevation control quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a manhole cover elevation control device according to one embodiment of the present invention.

[0019] Figure 2 This is a top view of a manhole cover elevation control device according to one embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the support column, its support rod, and the measuring rod in the manhole cover elevation control device according to one embodiment of the present invention.

[0021] Figure 4 This is a top view of the support column, its support rod, and the measuring rod in the manhole cover elevation control device according to one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the support rod and traction rod in a manhole cover elevation control device according to one embodiment of the present invention.

[0023] The attached figures are labeled as follows: 1. Circular bearing frame; 11. Frame body; 12. Hinge; 2. Support column; 21. First slide rail; 22. Second slide rail; 23. First limiting strip hole; 24. Second limiting strip hole; 25. Scale line; 26. Caster wheel; 3. Support rod; 31. Traction rod; 4. Measuring rod; 5. First limiting screw; 6. Second limiting screw; 7. Manhole cover. Detailed Implementation

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0025] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not 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 the invention.

[0026] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] like Figures 1 to 5 As shown, in this embodiment, a manhole cover elevation control device is disclosed, including an annular bearing frame 1 and a plurality of support columns 2 disposed on its outer periphery.

[0028] The annular support frame 1 is used to support and fix the manhole cover 7. Its internal shape and size are adapted to the manhole cover 7, and the manhole cover 7 can be placed or locked inside the annular support frame 1. In this embodiment, the annular support frame 1 includes two semi-circular frame bodies 11, and the mating ends of the two frame bodies 11 are connected together by hinges 12. Figure 1 and Figure 2 As shown, by rotating the hinge 12, the two frames 11 can be folded relative to each other, so that the annular support frame 1 is folded from a fully circular shape in use to a folded state that is convenient for storage and transportation, thus reducing the space occupied by the control device when not in use. In use, the two frames 11 are unfolded into the same plane to form a complete annular support frame 1 for supporting the manhole cover 7.

[0029] Three or more support columns 2 are provided, evenly distributed along the outer perimeter of the annular load-bearing frame 1, to support and adjust the height of the annular load-bearing frame 1. In this embodiment, four support columns 2 are provided, evenly distributed in a rectangular layout along the outer perimeter of the annular load-bearing frame 1. Compared with the arrangement of three support columns 2, this provides a more balanced support force for the annular load-bearing frame 1, making the support more stable and less prone to tilting or swaying. In other embodiments, the number of support columns 2 can be increased or decreased according to the size of the manhole cover 7 and the actual needs of the construction site, but should not be less than three, to ensure stable support of the annular load-bearing frame 1.

[0030] The support column 2 is vertically oriented, with a first vertical slide rail 21 on its inner side and a second vertical slide rail 22 on its outer side. A support rod 3 slides within the first slide rail 21, and the support rod 3 is horizontally oriented. One end of the support rod 3 slides along the first slide rail 21, while the other end is supported below the annular support frame 1, supporting the annular support frame 1 and the manhole cover 7 on it. The height of the annular support frame 1 relative to the ground is adjusted by sliding it up and down within the first slide rail 21. A measuring rod 4 slides within the second slide rail 22, and the measuring rod 4 is horizontally oriented. One end of the measuring rod 4 can slide up and down along the second slide rail 22. The measuring rod 4 itself does not bear the weight of the annular support frame 1 and the manhole cover 7; it is only used to determine the elevation reference position, providing a reference for adjusting the height of the support rod 3.

[0031] like Figure 3 As shown, the front side of the support column 2 is vertically provided with a first limiting slot 23 communicating with the first slide rail 21 and a second limiting slot 24 communicating with the second slide rail 22. Both the first limiting slot 23 and the second limiting slot 24 extend vertically along the support column 2, and their lengths are adapted to the adjustable range of the support rod 3 and the measuring rod 4. One end of the first limiting screw 5 passes through the first limiting slot 23 and the support rod 3 and abuts against the side wall of the first slide rail 21. By tightening the first limiting screw 5, the support rod 3 can be locked at any height position in the first slide rail 21. One end of the second limiting screw 6 passes through the second limiting slot 24 and the measuring rod 4 and abuts against the side wall of the second slide rail 22. By tightening the second limiting screw 6, the measuring rod 4 can be locked at any height position in the second slide rail 22. After loosening the first limiting screw 5 and the second limiting screw 6, the support rod 3 and the measuring rod 4 can slide freely along the first slide rail 21 and the second slide rail 22 respectively, which facilitates height adjustment; after adjustment, tightening them again can reliably fix the support rod 3 and the measuring rod 4.

[0032] The front side of the support column 2 is provided with scale lines 25, which are distributed vertically along the support column 2 to indicate the height position of the support rods 3 and measuring rods 4. When adjusting the support rods 3 and measuring rods 4, construction personnel can visually read the current height value by observing their relative position with the scale lines 25. This facilitates the unified leveling of the support rods 3 and measuring rods 4 on multiple support columns 2, improving the accuracy and efficiency of elevation adjustment.

[0033] like Figure 2 and Figure 4 As shown, in this embodiment, the opening width on the side of the first slide rail 21 is smaller than the width inside the first slide rail 21. Correspondingly, the cross-section of the support rod 3 is set to a T-shape that matches the first slide rail 21. When the support rod 3 is assembled, its T-shaped head is accommodated in the wider space inside the first slide rail 21, while its neck protrudes from the narrower opening on the side of the first slide rail 21. This allows the support rod 3 to slide only along the length of the first slide rail 21 and not to come out of the side opening of the first slide rail 21 perpendicular to the sliding direction. This effectively limits and guides the support rod 3, ensuring that the support rod 3 will not detach laterally while bearing the weight of the annular load-bearing frame 1 and the manhole cover 7.

[0034] Furthermore, such as Figure 5 As shown, in this embodiment, the longitudinal section of the support rod 3 is also set to T-shape, that is, the head of the support rod 3 that contacts the inner wall of the first slide 21 extends continuously along its length. This design makes the contact area between the support rod 3 and the inner wall of the first slide 21 larger and the force more uniform. It can effectively avoid the shaking or deflection of the support rod 3 due to local contact during sliding or under force, and further improve the stability of the support rod 3 after installation.

[0035] In this embodiment, two first limiting screws 5 are spaced apart along the length of the support rod 3. Compared with only one first limiting screw 5, the two first limiting screws 5 can apply locking force at different height positions of the support rod 3, avoiding rotation or tilting of the support rod 3 due to single-point locking, making the fixation of the support rod 3 more secure and reliable, especially suitable for application scenarios where the manhole cover 7 has a large self-weight.

[0036] Furthermore, in this embodiment, the upper end of the support rod 3 is connected to a traction rod 31. The traction rod 31 is vertically arranged in the first slide rail 21, and its upper end extends through the top of the support column 2 or extends to a height convenient for construction personnel to operate. When adjusting the elevation of the manhole cover 7, the construction personnel do not need to directly contact the support rod 3 located at the lower part of the first slide rail 21 and close to the annular bearing frame 1. Instead, they only need to hold the traction rod 31 above the support column 2 and pull or press down the traction rod 31 to drive the support rod 3 to slide synchronously along the first slide rail 21, thereby indirectly adjusting the height of the annular bearing frame 1. The operation is more labor-saving and convenient.

[0037] In this embodiment, the opening width on the side of the second slide rail 22 is also smaller than the width inside the second slide rail 22. The cross-section of the measuring rod 4 is set to a T-shape to fit the second slide rail 22. Its limiting and guiding principle is the same as the cooperation relationship between the first slide rail 21 and the support rod 3, which will not be repeated here. Furthermore, the longitudinal section of the measuring rod 4 is also set to a T-shape, which increases the contact area between the measuring rod 4 and the inner wall of the second slide rail 22. The measuring rod 4 can maintain good stability after sliding adjustment and fixing, avoiding deviation of the elevation benchmark due to the shaking of the measuring rod 4.

[0038] In this embodiment, the bottom of the support column 2 is also equipped with casters 26. By providing casters 26, construction personnel do not need to lift and move the entire device when it needs to be transferred to different manhole cover 7 installation locations; they can simply push the device to move it. This reduces effort and prevents damage to the annular support frame 1 and its supporting rods 3, measuring rods 4, and other components during transfer, thus improving the efficiency of transferring the control device between different work surfaces. In other embodiments, a braking structure can be further provided on the casters 26 to lock them after the device is moved into position, preventing accidental movement of the device during subsequent elevation adjustments.

[0039] The support rod 3 and the first slide rail 21 are connected by a T-shaped snap-fit, which facilitates not only sliding adjustment but also disassembly and replacement of the support rod 3. When the support rod 3 is worn or damaged, it can be slid out along the end of the first slide rail 21 and removed. After replacing it with a new support rod 3, it can be reinstalled into the first slide rail 21 without the need for complete disassembly of the support column 2, thus reducing the maintenance cost of the control device. The assembly relationship between the measuring rod 4 and the second slide rail 22 is the same, which also facilitates disassembly and maintenance.

[0040] In this embodiment, a method for controlling the elevation of a manhole cover is also disclosed, which is applied to the manhole cover elevation control device described above, and mainly includes the following steps: Step S1: Fix the manhole cover 7 in the ring-shaped support frame 1, and move the manhole cover elevation control device to the manhole cover installation position.

[0041] Specifically, first, the manhole cover 7 is placed and fixed in the annular support frame 1. If the annular support frame 1 is in a folded state, the two frames 11 are unfolded first, and the two frames 11 are kept in the same plane by the hinge 12 to form a complete annular structure before the manhole cover 7 is placed in. Then, the control device is moved to the installation position of the manhole cover 7 by the universal wheels 26 at the bottom of the support column 2, so that the annular support frame 1 is roughly aligned with the manhole opening position of the inspection well.

[0042] Step S2: Adjust the height of the measuring rod 4 closest to the curbstone so that its lower side is in contact with the top surface of the curbstone. Adjust the height of the other measuring rods 4 so that all the measuring rods 4 in the manhole cover elevation control device are at the same height.

[0043] Specifically, first loosen the second limiting screw 6 on the support column 2 closest to the curbstone, adjust the height of the measuring rod 4 on that support column 2 so that the lower end face of the measuring rod 4 is in contact with the top surface of the curbstone, and then tighten the corresponding second limiting screw 6 for fixation; then loosen the second limiting screw 6 on the other support columns 2 in sequence, and adjust the height of the remaining measuring rods 4 with reference to the scale line 25 on the front side of each support column 2, so that the lower end faces of all measuring rods 4 in the control device are kept at the same horizontal height, that is, using the top surface elevation of the curbstone as a reference, a unified horizontal reference plane is established among the multiple support columns 2. In this step, it is assumed that the four support columns 2 of the manhole cover elevation control device are at the same horizontal plane, so all measuring rods 4 can be adjusted to be at the same height by using the scale line 25. If the ground at the manhole cover installation location is uneven, a longer measuring rod 4 can be used, so that all measuring rods 4 are placed on the curbstone on the side, which can also ensure that all measuring rods 4 are at the same height.

[0044] Step S3: Adjust the height of all support rods 3 according to the elevation difference between the manhole cover 7 and the curb stone, and fix them with the first limit screw 5 so that the height of the manhole cover 7 meets the design elevation.

[0045] Specifically, after determining the elevation benchmark, based on the elevation difference between the manhole cover 7 and the curbstone as required by the design, the height of the support rods 3 on each support column 2 is adjusted with reference to the scale line 25. This ensures that the height difference between the support rod 3 and the corresponding measuring rod 4 is consistent with the design elevation difference. After adjustment, the corresponding first limit screws 5 are tightened to lock each support rod 3 in the first slide rail 21, thereby ensuring that the overall elevation of the annular bearing frame 1 and the manhole cover 7 on it meets the design requirements. In embodiments where the support rod 3 is equipped with a traction rod 31, construction personnel can indirectly adjust the height of the support rod 3 by operating the traction rod 31, without having to bend over to contact the support rod 3 at the bottom of the support column 2, further improving the convenience of operation.

[0046] After the elevation of manhole cover 7 is adjusted and locked, subsequent construction work such as concrete pouring and road base filling can be carried out around the annular bearing frame 1 and manhole cover 7. Since the support rod 3 is reliably locked in the first slide rail 21 by the first limit screw 5, it can provide stable support for manhole cover 7 and prevent displacement or settlement of manhole cover 7 during subsequent construction. After the surrounding concrete or road surface material reaches the design strength, loosen the first limit screw 5 and the second limit screw 6 on each support column 2, slide the support rod 3 and measuring rod 4 out or back to the initial position along the first slide rail 21 and the second slide rail 22 respectively, and then open the hinge 12 to fold the annular bearing frame 1. The control device can then be removed from around manhole cover 7 and moved to the next manhole cover 7 installation position to repeat the above operation, so as to achieve rapid and accurate control of manhole cover elevation.

[0047] The manhole cover elevation control device of the present invention, through the cooperation of the annular bearing frame 1, the support column 2, the support rod 3 and the measuring rod 4, achieves rapid adjustment and stable fixation of the manhole cover 7 elevation based on the curb stone elevation, reducing the workload of repeated manual measurement and trial installation, and improving the installation accuracy and construction efficiency of the manhole cover 7; the annular bearing frame 1 is foldable and the bottom of the support column 2 is equipped with universal wheels 26, which further improves the portability and applicability of the device, and has good promotion and application value.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A manhole cover elevation control device, characterized in that, include: Circular load-bearing frame; Three or more support columns are evenly arranged on the outer periphery of the annular bearing frame. A first slide rail is provided on the inner side along the vertical direction, a second slide rail is provided on the outer side along the vertical direction, and a first limiting strip hole communicating with the first slide rail and a second limiting strip hole communicating with the second slide rail are provided on the front side along the vertical direction. The support rod has one end slidably disposed in the first slide rail, and the other end supported below the annular bearing frame; The measuring rod has one end slidably positioned in the second slide rail; The first limiting screw has one end passing through the first limiting strip hole and the support rod and then pressing tightly against the side wall of the first slide. The second limiting screw has one end passing through the second limiting strip hole and the measuring rod, and then abutting tightly against the side wall of the second slide. The scale lines are located on the front side of the support column.

2. The manhole cover elevation control device as described in claim 1, characterized in that, There are four support columns.

3. The manhole cover elevation control device as described in claim 1, characterized in that, The width of the opening on the side of the first slide rail is smaller than the width inside the first slide rail; The cross-section of the support rod is T-shaped.

4. The manhole cover elevation control device as described in claim 3, characterized in that, The longitudinal section of the support rod is T-shaped.

5. The manhole cover elevation control device as described in claim 1, characterized in that, Two first limiting screws are inserted through the support rod.

6. The manhole cover elevation control device as described in claim 1, characterized in that, The upper end of the support rod is connected to a traction rod, which is vertically positioned in the first slide rail.

7. The manhole cover elevation control device as described in claim 1, characterized in that, The width of the opening on the side of the second slide is smaller than the width inside the second slide; The cross-section of the measuring rod is T-shaped.

8. The manhole cover elevation control device as described in claim 1, characterized in that, The annular support frame includes two semi-circular frame bodies connected together by hinges.

9. The manhole cover elevation control device as described in claim 1, characterized in that, The bottom of the support column is equipped with casters.

10. A method for controlling the elevation of a manhole cover, applied to the manhole cover elevation control device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Fix the manhole cover in the annular support frame and move the control device to the manhole cover installation position; S2. Adjust the height of the measuring rod closest to the curbstone so that its lower side is in contact with the top surface of the curbstone. Adjust the height of the other measuring rods so that all measuring rods in the control device are at the same height. S3. Adjust the height of all support rods according to the elevation difference between the manhole cover and the curb, and fix them with the first limit screw so that the height of the manhole cover meets the design elevation.

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