Adjustable manhole cover concrete gasket

Abstract

The application relates to an adjustable manhole cover concrete gasket and relates to the technical field of manhole cover gaskets, which comprises a lower gasket body and an upper gasket body. The application is characterized in that the lower gasket body and the upper gasket body are in a split structure, and the upper gasket body can rotate relative to the lower gasket body through the sliding connection of the connecting bolt and the arc-shaped groove. When the height of the manhole cover needs to be adjusted, the upper gasket body is only needed to be rotated after the fastening nut is loosened. At this time, the support limiting block slides along the inclined surface of the gradually-changing annular block in the rotating annular groove. Since the heights of the multiple support limiting blocks are in an arithmetic progression and increase, the support limiting block contacts the gradually-changing annular block at different height positions with the rotation of the upper gasket body, so that the overall height of the upper gasket body relative to the lower gasket body is changed. After being adjusted to a proper height, the fastening nut is tightened to be fixed, so that the convenient adjustment without the assistance of manual work or heavy mechanical equipment is realized, the repair efficiency after settlement is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to manhole cover gaskets, and more particularly to an adjustable manhole cover concrete gasket. Background Technology

[0002] Currently, in municipal engineering construction and maintenance, the installation of manhole covers mostly adopts the design scheme of integral concrete base. This base is fixed by directly and rigidly connecting to the manhole cylinder to ensure its stability during use. With the continuous advancement of urbanization, the underground pipe network system is gradually aging, and the road traffic load is also continuously increasing, which makes some potential problems increasingly apparent.

[0003] Traditional concrete manhole cover gaskets are typically designed as a single structure. While this design provides a certain load-bearing capacity, it lacks mechanical structures or functional modules that can actively prevent foundation settlement. In such cases, once settlement occurs, manual intervention or heavy machinery is required for adjustment and repair. This approach is not only inefficient but also has high maintenance costs, making it difficult to meet the needs of efficient urban management in modern cities. To address these issues, an adjustable manhole cover concrete gasket has been proposed. Utility Model Content

[0004] The purpose of this application is to provide an adjustable concrete gasket for manhole covers, which has the advantages of adjustable function and solves the problem that traditional concrete gaskets require manual or heavy machinery to adjust and repair after settlement, which is inefficient and has high maintenance costs.

[0005] The adjustable manhole cover concrete gasket provided in this application adopts the following technical solution: it includes a lower ring body and an upper ring body, the upper ring body is located on top of the lower ring body, and both the lower ring body and the upper ring body are annular in shape; The lower ring body is fixedly connected to the top of four connecting bolts, which are evenly arranged in a ring on the top of the lower ring body. The upper ring body has four arc-shaped grooves, which are evenly arranged in a ring on the inside of the upper ring body. The connecting bolts pass through the arc-shaped grooves and are threaded with fastening nuts. The top of the lower ring body has a rotating annular groove. The bottom of the upper ring body is fixedly connected to multiple support limiting blocks. The bottom of the rotating annular groove is fixedly connected to a gradually deformed annular block. The support limiting block is slidably connected in the rotating annular groove. The bottom of the support limiting block overlaps the top of the gradually deformed annular block. The height of the multiple support limiting blocks increases in an arithmetic sequence. By adopting the above technical solution, and by setting a split structure of the lower and upper ring bodies, and cooperating with the sliding connection of the connecting bolts and the arc-shaped groove, the upper ring body can rotate circumferentially relative to the lower ring body. When it is necessary to adjust the height of the manhole cover, simply loosen the fastening nut and rotate the upper ring body. At this time, the support limiting block will slide along the inclined surface of the gradually deformed annular block in the rotating annular groove. Since the heights of multiple support limiting blocks increase in an arithmetic sequence, as the upper ring body rotates, the support limiting block contacts the gradually deformed annular block at different height positions, thereby changing the overall height of the upper ring body relative to the lower ring body. After adjusting to the appropriate height, tightening the fastening nut will complete the fixation. This achieves convenient adjustment without the need for manual or heavy mechanical equipment assistance, which can improve the repair efficiency after settlement and reduce maintenance costs. At the same time, the sliding of the support limiting block in the rotating annular groove can also guide the relative rotation of the upper and lower ring bodies, ensuring the stability and accuracy of the adjustment process.

[0006] Preferably, a sliding contraction groove is provided on the inner side of the arc-shaped groove, a sliding cylinder is fitted on the surface of the connecting bolt, and two folding plates are fixedly connected to the surface of the sliding cylinder; By adopting the above technical solution, and by setting up a sliding cylinder and folding plates, when the connecting bolt slides in the arc groove, the sliding cylinder can move synchronously along the sliding contraction groove, and the two folding plates can expand or retract with the sliding of the sliding cylinder, thereby forming a dynamic shield at the opening of the arc groove, effectively preventing impurities such as mud and stones from entering the arc groove, and avoiding the accumulation of impurities from affecting the sliding adjustment of the connecting bolt.

[0007] Preferably, one side of the folding plate is fixedly connected to the inner side of the sliding shrinkage groove; By adopting the above technical solution, and by setting one side of the folding plate to be fixedly connected to the inner side of the sliding shrink groove, the folding plate can always rotate stably around the fixed point as the axis during the unfolding or folding process, which can avoid the folding plate from shifting or misaligning due to loose connection.

[0008] Preferably, the lower ring body has multiple positioning holes at its top, and the multiple positioning holes are evenly distributed in a ring on the outer periphery of the top of the lower ring body. An annular positioning block is fixedly connected to the outer periphery of the inner side of the upper ring body. An annular sliding groove is formed inside the annular positioning block. An auxiliary annular groove is formed on the inner side of the annular sliding groove. An arc-shaped through hole is formed on the inner side of the auxiliary annular groove. By adopting the above technical solution, and by setting an annular sliding groove and an auxiliary annular groove, the moving part of the positioning component can be accommodated, and the arc-shaped through hole design can provide a guide channel for the connecting block.

[0009] Preferably, a plurality of connecting springs are fixedly connected to the top of the annular sliding groove, with three connecting springs forming a group. An annular lifting plate is fixedly connected to the bottom of the connecting springs. A plurality of positioning rods are fixedly connected to the bottom of the annular lifting plate, with seven positioning rods forming a group. The bottom of the positioning rods slides through the bottom of the annular sliding groove and is engaged in the positioning hole. By adopting the above technical solution and setting up a cooperative structure between the connecting spring and the annular lifting plate, continuous downward pressure can be provided to the positioning rod, ensuring that the positioning rod remains tightly engaged with the positioning hole. This effectively prevents circumferential displacement of the upper ring body due to vibration or external forces during use. Multiple connecting springs are distributed in groups to ensure uniform force on the annular lifting plate, avoiding instability caused by the failure of a single spring. When adjusting the angle of the upper ring body, simply lift the annular lifting plate upwards to disengage the positioning rod from the positioning hole, then rotate the upper ring body to the desired position. After releasing, the connecting spring resets, causing the positioning rod to re-engage with the corresponding positioning hole. This method is convenient and highly efficient.

[0010] Preferably, an annular connecting plate is slidably connected inside the auxiliary annular groove, and four first triangular blocks are fixedly connected to the bottom of the annular lifting plate. The four first triangular blocks are evenly distributed in a ring at the bottom of the annular lifting plate. Four second triangular blocks are fixedly connected to the side of the annular connecting plate. The four second triangular blocks are evenly distributed in a ring on the side of the annular connecting plate, and the side of the first triangular block overlaps with the side of the second triangular block. By adopting the above technical solution and setting the inclined surface cooperation structure of the first and second triangular blocks, the vertical movement of the annular lifting plate can be converted into the lateral sliding of the annular connecting plate. When the second triangular block moves, through the contact between the first and second triangular blocks, the movement of the second triangular block can squeeze one side of the first triangular block, thereby pushing the first triangular block to move upward. During this process, the inclined surface contact point between the first and second triangular blocks will dynamically change with the lifting and lowering of the annular lifting plate and the sliding of the annular connecting plate, ensuring that the force transmission is smooth and efficient.

[0011] Preferably, a connecting block is fixedly connected to the surface of the annular connecting plate, the connecting block is slidably connected in the through hole, one side of the connecting block slides through the through hole, and a toggle plate is fixedly connected to it; By adopting the above technical solution and setting a linkage structure between the connecting block and the actuating plate, the position of the annular connecting plate can be manually adjusted. When the operator needs to adjust the lateral position of the annular connecting plate, he only needs to move the external actuating plate to drive the connecting block to slide in the through hole, thereby pulling the annular connecting plate to move synchronously. This design makes the adjustment process intuitive and convenient, without the need for additional tools, which greatly improves the flexibility and efficiency of operation.

[0012] Preferably, an anti-slip pad is fixedly connected to the side of the toggle plate; By adopting the above technical solution and setting anti-slip mats, the friction between the operator's hand and the lever can be effectively increased, thus preventing slippage during operation.

[0013] In summary, this application includes at least one of the following beneficial technical effects: This adjustable manhole cover concrete gasket features a split structure with an upper and lower ring body. The upper ring body can rotate circumferentially relative to the lower ring body via a sliding connection between the connecting bolts and an arc-shaped groove. To adjust the manhole cover height, simply loosen the fastening nut and rotate the upper ring body. The support limiting block will then slide along the inclined surface of the gradually deformed annular block within the rotating annular groove. Since the heights of the multiple support limiting blocks increase in an arithmetic sequence, as the upper ring body rotates, the support limiting blocks contact the gradually deformed annular block at different heights, thus changing the overall height of the upper ring body relative to the lower ring body. After adjusting to the appropriate height, tightening the fastening nut completes the fixation. This achieves convenient adjustment without the need for manual labor or heavy machinery, improving the efficiency of post-settlement repair and reducing maintenance costs. Furthermore, the sliding of the support limiting block within the rotating annular groove guides the relative rotation of the upper and lower ring bodies, ensuring the stability and accuracy of the adjustment process. Attached Figure Description

[0014] Figure 1 This is a frontal three-dimensional structural diagram of this application; Figure 2 This is a schematic diagram of the lower ring structure in this application; Figure 3 This is a schematic diagram of the upper ring structure in this application; Figure 4 This is a schematic diagram of the fastening nut in this application; Figure 5 This is a schematic diagram of the arc-shaped through hole in this application; Figure 6 This is a schematic diagram of the connecting spring in this application.

[0015] In the diagram: 1. Lower ring body; 101. Rotating annular groove; 102. Gradually deformed annular block; 103. Positioning hole; 104. Connecting bolt; 2. Upper ring body; 201. Support limiting block; 202. Arc-shaped groove; 203. Sliding contraction groove; 204. Annular sliding groove; 205. Auxiliary annular groove; 206. Arc-shaped through hole; 207. Connecting spring; 208. Annular lifting plate; 209. Positioning rod; 2010. First triangular block; 2011. Annular connecting plate; 2012. Second triangular block; 2013. Connecting block; 2014. Actuating plate; 2015. Anti-slip pad; 2016. Annular positioning block; 3. Fastening nut; 4. Slide cylinder; 401. Folding plate. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail below.

[0017] Example 1: An adjustable concrete washer for manhole covers, referring to... Figure 1 , Figure 2 , Figure 3 and Figure 4 It includes a lower ring body 1 and an upper ring body 2, with the upper ring body 2 located on top of the lower ring body 1. Both the lower ring body 1 and the upper ring body 2 are ring-shaped. Four connecting bolts 104 are fixedly connected to the top of the lower ring body 1, and the four connecting bolts 104 are evenly arranged in a ring on the top of the lower ring body 1. The upper ring body 2 has four arc-shaped grooves 202, which are also evenly arranged in a ring inside the upper ring body 2. The connecting bolts 104 pass through the arc-shaped grooves 202, and the connecting bolts 104 are threaded with fastening nuts 3. The top of the lower ring body 1 has a rotating annular groove 101. The bottom of the upper ring body 2 is fixedly connected to multiple support limiting blocks 201. The bottom of the rotating annular groove 101 is fixedly connected to a gradually deformed annular block 102. The support limiting blocks 201 are slidably connected in the rotating annular groove 101, and the bottom of the support limiting blocks 201 overlaps the top of the gradually deformed annular block 102. The heights of the multiple support limiting blocks 201 increase in an arithmetic sequence. By setting a split structure for the lower ring body 1 and the upper ring body 2, and cooperating with the sliding connection between the connecting bolts 104 and the arc-shaped grooves 202, the upper ring body 1 achieves this effect. This design allows the upper ring 2 to rotate circumferentially relative to the lower ring 1. When adjusting the height of the manhole cover, simply loosen the fastening nut 3 and rotate the upper ring 2. At this time, the support limiting block 201 will slide along the inclined surface of the gradually deformed annular block 102 within the rotating annular groove 101. Since the heights of multiple support limiting blocks 201 increase in an arithmetic sequence, as the upper ring 2 rotates, the support limiting block 201 contacts the gradually deformed annular block 102 at different heights, thereby changing the overall height of the upper ring 2 relative to the lower ring 1. After adjusting to the appropriate height, tightening the fastening nut 3 will complete the fixation. This achieves convenient adjustment without the need for manual labor or heavy machinery, which can improve the repair efficiency after settlement and reduce maintenance costs. At the same time, the sliding of the support limiting block 201 within the rotating annular groove 101 can also guide the relative rotation of the upper and lower rings 1, ensuring the stability and accuracy of the adjustment process.

[0018] Please see Figure 3 and Figure 4 The inner side of the arc-shaped groove 202 is provided with a sliding contraction groove 203. A sliding cylinder 4 is fitted on the surface of the connecting bolt 104. Two folding plates 401 are fixedly connected to the surface of the sliding cylinder 4. By setting the sliding cylinder 4 and the folding plates 401, when the connecting bolt 104 slides in the arc-shaped groove 202, the sliding cylinder 4 can move synchronously along the sliding contraction groove 203. The two folding plates 401 can unfold or retract with the sliding of the sliding cylinder 4, thereby forming a dynamic shield at the opening of the arc-shaped groove 202, effectively preventing impurities such as mud, sand and stones from entering the interior of the arc-shaped groove 202. This can avoid the accumulation of impurities affecting the sliding adjustment of the connecting bolt 104. One side of the folding plate 401 is fixedly connected to the inner side of the sliding contraction groove 203. By setting one side of the folding plate 401 to be fixedly connected to the inner side of the sliding contraction groove 203, the folding plate 401 can always rotate stably around the fixed point as the axis during unfolding or retracting, which can avoid the folding plate 401 from shifting or misaligning due to loose connection.

[0019] Please see Figure 2 , Figure 4 , Figure 5 and Figure 6The lower ring body 1 has multiple positioning holes 103 on its top, which are evenly distributed in a ring on the outer periphery of the top of the lower ring body 1. An annular positioning block 2016 is fixedly connected to the outer periphery of the inner ring body 2. An annular sliding groove 204 is formed inside the annular positioning block 2016. An auxiliary annular groove 205 is formed on the inner side of the annular sliding groove 204. An arc-shaped through hole 206 is formed on the inner side of the auxiliary annular groove 205. By setting the annular sliding groove 204 and the auxiliary annular groove 205, the movable part of the positioning component can be accommodated. The arc-shaped through hole 206 provides a guide channel for the connecting block 2013. Multiple connecting springs 207 are fixedly connected to the top of the annular sliding groove 204. Three connecting springs 207 form a group. A ring-shaped lifting plate 208 is fixedly connected to the bottom end, and multiple positioning rods 209 are fixedly connected to the bottom end of the ring-shaped lifting plate 208. Seven positioning rods 209 form a group. The bottom end of the positioning rod 209 slides through the bottom of the ring-shaped sliding groove 204 and is engaged in the positioning hole 103. By setting a connecting spring 207 and a cooperating structure with the ring-shaped lifting plate 208, continuous downward pressure can be provided to the positioning rod 209, ensuring that the positioning rod 209 always remains tightly engaged with the positioning hole 103. This effectively prevents circumferential displacement of the upper ring body 2 due to vibration or external force during use. The multiple connecting springs 207 are distributed in groups to ensure uniform force on the ring-shaped lifting plate 208, avoiding unstable positioning due to the failure of a single spring. When adjusting the angle of the upper ring body 2, simply lift the annular lifting plate 208 upwards to disengage the positioning rod 209 from the positioning hole 103, then rotate the upper ring body 2 to the desired position. After releasing, the connecting spring 207 resets, causing the positioning rod 209 to re-engage into the corresponding positioning hole 103. The operation is convenient and the adjustment efficiency is high. An annular connecting plate 2011 is slidably connected inside the auxiliary annular groove 205. Four first triangular blocks 2010 are fixedly connected to the bottom of the annular lifting plate 208. The four first triangular blocks 2010 are evenly distributed in a ring at the bottom of the annular lifting plate 208. Four second triangular blocks 2012 are fixedly connected to the side of the annular connecting plate 2011. The four second triangular blocks 2012 are evenly distributed in a ring on the side of the annular connecting plate 2011. The first triangular blocks 2010 The first triangular block 2010 is attached to the side of the second triangular block 2012. By setting a sloped engagement structure between the first triangular block 2010 and the second triangular block 2012, the vertical movement of the annular lifting plate 208 can be converted into the lateral sliding of the annular connecting plate 2011. When the second triangular block 2012 moves, the contact between the first triangular block 2010 and the second triangular block 2012 allows the movement of the second triangular block 2012 to compress one side of the first triangular block 2010, thereby pushing the first triangular block 2010 upward. During this process, the sloped contact point between the first triangular block 2010 and the second triangular block 2012 dynamically changes with the lifting and lowering of the annular lifting plate 208 and the sliding of the annular connecting plate 2011, ensuring smooth and efficient force transmission.A connecting block 2013 is fixedly connected to the surface of the annular connecting plate 2011. The connecting block 2013 is slidably connected within a through hole. One side of the connecting block 2013 slides through the through hole and is fixedly connected to a toggle plate 2014. By setting a linkage structure between the connecting block 2013 and the toggle plate 2014, the position of the annular connecting plate 2011 can be manually adjusted. When the operator needs to adjust the lateral position of the annular connecting plate 2011, they only need to toggle the external toggle plate 2014 to drive the connecting block 2013 to slide within the through hole, thereby pulling the annular connecting plate 2011 to move synchronously. This design makes the adjustment process intuitive and convenient, requiring no additional tools, greatly improving the flexibility and efficiency of operation. An anti-slip pad 2015 is fixedly connected to the side of the toggle plate 2014. By setting the anti-slip pad 2015, the friction between the operator's hand and the toggle plate 2014 can be effectively increased, preventing slippage during toggle.

[0020] The implementation principle of this application embodiment is as follows: When the height of the manhole cover needs to be adjusted, the operator moves the toggle plate 2014, causing the connecting block 2013 to slide in the arc-shaped through hole 206, which drives the annular connecting plate 2011 to slide in the auxiliary annular groove 205. This allows multiple second triangular blocks 2012 to squeeze and push multiple first triangular blocks 2010 respectively. At this time, the connecting spring 207 is stretched, and the annular lifting plate 208 can drive the positioning rod 209 to move upward, so that the bottom end of the positioning rod 209 can disengage from the positioning hole 103 at the top of the lower ring body 1. Next, loosen the fastening nut 3 on the connecting bolt 104, and then push the upper ring body 2 to rotate circumferentially relative to the lower ring body 1. The support limiting block 201 at the bottom of the upper ring body 2 slides along the inclined surface of the gradually deformed ring block 102 in the rotating annular groove 101. Since the height of the support limiting block 201 increases in an arithmetic sequence, the overall height of the upper ring body 2 changes accordingly when the support limiting block 201 at different positions contacts the gradually deformed ring block 102. During this process, the connecting bolt 104 slides synchronously in the arc groove 202, and the slide cylinder 4 drives the folding plate 401 to move along the sliding contraction groove 203, forming a dynamic shield on the opening of the arc groove 202, which can prevent impurities from entering. Once the height is adjusted to the appropriate level, stop rotating the upper ring body 2, loosen the annular lifting plate 208, and the connecting spring 207 will reset and push the annular lifting plate 208 downward. The positioning rod 209 will then re-engage into the corresponding positioning hole 103. Finally, tighten the fastening nut 3 to fix the upper ring body 2 and the lower ring body 1 together, thus completing the entire height adjustment operation.

Claims

1. An adjustable concrete washer for a manhole cover, comprising a lower ring (1) and an upper ring (2), characterized in that: The upper ring body (2) is located on top of the lower ring body (1), and both the lower ring body (1) and the upper ring body (2) are ring-shaped. The lower ring body (1) is fixedly connected to the top of four connecting bolts (104), which are evenly arranged in a ring on the top of the lower ring body (1). The upper ring body (2) has four arc-shaped grooves (202) inside, which are evenly arranged in a ring inside the upper ring body (2). The connecting bolts (104) pass through the arc-shaped grooves (202). The connecting bolts (104) are threaded with fastening nuts (3). The lower ring body (1) has a rotating ring on the top. The upper ring body (2) is fixedly connected to a plurality of support limiting blocks (201) at the bottom of the rotating annular groove (101). A gradually deformed annular block (102) is fixedly connected to the bottom of the rotating annular groove (101). The support limiting block (201) is slidably connected in the rotating annular groove (101). The bottom of the support limiting block (201) overlaps the top of the gradually deformed annular block (102). The heights of the plurality of support limiting blocks (201) increase in an arithmetic sequence. The bottom of the fastening nut (3) is close to the top of the upper ring body (2).

2. The adjustable manhole cover concrete washer according to claim 1, characterized in that: The inner side of the arc groove (202) is provided with a sliding contraction groove (203), and the surface of the connecting bolt (104) is fitted with a slide cylinder (4), and two folding plates (401) are fixedly connected to the surface of the slide cylinder (4).

3. An adjustable manhole cover concrete washer according to claim 2, characterized in that: One side of the folding plate (401) is fixedly connected to the inner side of the sliding shrinkage groove (203).

4. The adjustable manhole cover concrete washer according to claim 1, characterized in that: The lower ring body (1) has multiple positioning holes (103) at its top. The multiple positioning holes (103) are evenly distributed in a ring on the outer periphery of the top of the lower ring body (1). The upper ring body (2) has an annular positioning block (2016) fixedly connected to its inner outer periphery. The annular positioning block (2016) has an annular sliding groove (204) inside. The annular sliding groove (204) has an auxiliary annular groove (205) on its inner side. The auxiliary annular groove (205) has an arc-shaped through hole (206) on its inner side.

5. An adjustable manhole cover concrete washer according to claim 4, characterized in that: Multiple connecting springs (207) are fixedly connected to the top of the annular sliding groove (204). Three connecting springs (207) form a group. An annular lifting plate (208) is fixedly connected to the bottom of the connecting springs (207). Multiple positioning rods (209) are fixedly connected to the bottom of the annular lifting plate (208). Seven positioning rods (209) form a group. The bottom of the positioning rods (209) slides through the bottom of the annular sliding groove (204) and is engaged in the positioning hole (103).

6. An adjustable manhole cover concrete washer according to claim 5, characterized in that: An annular connecting plate (2011) is slidably connected inside the auxiliary annular groove (205). Four first triangular blocks (2010) are fixedly connected to the bottom of the annular lifting plate (208). The four first triangular blocks (2010) are evenly distributed in a ring at the bottom of the annular lifting plate (208). Four second triangular blocks (2012) are fixedly connected to the side of the annular connecting plate (2011). The four second triangular blocks (2012) are evenly distributed in a ring on the side of the annular connecting plate (2011). The side of the first triangular block (2010) overlaps the side of the second triangular block (2012).

7. An adjustable manhole cover concrete washer according to claim 6, characterized in that: A connecting block (2013) is fixedly connected to the surface of the annular connecting plate (2011). The connecting block (2013) is slidably connected in the through hole. One side of the connecting block (2013) slides through the through hole and is fixedly connected to a toggle plate (2014).

8. An adjustable manhole cover concrete washer according to claim 7, characterized in that: The toggle plate (2014) is fixedly connected to an anti-slip pad (2015) on its side.

Images