Height-adjustable kiln well cover

Abstract

This utility model belongs to the technical field of manhole covers, specifically relating to an adjustable-height manhole cover. It includes: a base, a cover ring, a cover plate, and a height adjustment mechanism; the lower side of the base is the manhole wall and roadbed, and the upper side is the roadbed concrete; the cover ring has the same diameter as the base and is stacked vertically on top of the base; the cover plate is connected to the cover ring via a hinge structure; the height adjustment mechanism is located between the base and the cover ring, adjusting the distance between them by stacking different numbers of washers. This novel structure aims to achieve flexible adjustment of the cover plate height through reasonable design, ensuring that the manhole cover is perfectly flush with the ground after installation, and facilitating repair after cover plate settlement; simultaneously, it is equipped with rubber pads to reduce noise pollution, extend the service life of the manhole cover, and provide more reliable protection for the normal operation of the city and the lives of residents.

Description

Technical Field

[0001] This utility model belongs to the technical field of kiln well covers, specifically relating to an adjustable height kiln well cover. Background Technology

[0002] Manhole covers, an indispensable and important component of urban infrastructure, are widely used in various aspects of daily life. Whether it's in urban water supply and drainage systems, ensuring the smooth discharge of rainwater and sewage, or in the laying of communication cables, providing a channel for high-speed information transmission, manhole covers play a crucial role in covering the outlets of these pipes. They not only prevent pedestrians and vehicles from accidentally falling into the pipes, ensuring public safety, but also protect the internal facilities of the pipes and prevent debris from entering and clogging them.

[0003] Currently, most manhole covers on the market adopt a traditional structure, consisting of a cover plate and a base, exhibiting a split structure. Furthermore, the base is also connected to the ground in a separate manner. While this design seems simple, it actually has many drawbacks. Due to the lack of an adjustable cover height device, it is difficult for installers to precisely adjust the manhole cover to be completely flush with the ground during installation. This often leads to two extreme situations after installation: either the cover sinks below the ground level, forming a recessed area that not only affects the smoothness of the road surface and inconveniences pedestrians but also easily accumulates water, breeding bacteria and insects; or it protrudes above the ground, becoming a bump on the road surface, posing a potential safety hazard to passing vehicles, requiring them to swerve or slow down, easily leading to traffic accidents.

[0004] Over long-term use, manhole covers are prone to displacement due to vibrations from vehicles and trampling. This is especially true in busy areas where frequent vehicle traffic, particularly with the increasing number of heavy trucks, causes the covers to settle. Furthermore, when vehicle wheels strongly impact the surface of the manhole cover, a violent collision occurs between the cover and its base. This impact not only generates significant noise, especially at night, severely affecting the quality of life and disrupting the rest of nearby residents, but also easily damages the cover over time, leading to cracks, deformation, or even breakage. This further shortens the lifespan of the manhole cover and increases maintenance and replacement costs. Utility Model Content

[0005] In order to effectively solve the above-mentioned many problems existing in the prior manhole cover and improve the installation quality and service performance of the manhole cover, after in-depth research and repeated experiments, we propose an innovative manhole cover structure with adjustable height. This novel structure aims to realize flexible adjustment of the cover height through reasonable design, ensure that the manhole cover is perfectly flush with the ground after installation, and enable repair after the cover settles; meanwhile, it is equipped with a rubber cushion, thereby reducing noise pollution, prolonging the service life of the manhole cover, and providing a more reliable guarantee for the normal operation of the city and the life of residents.

[0006] The technical scheme adopted by the utility model is as follows: A height-adjustable manhole cover, comprising: a base, the lower side of which is connected to a shaft wall and a roadbed, and the upper side of which is connected to roadbed concrete; a manhole cover ring, which has the same diameter as the base and is stacked above the base in the vertical direction; a cover plate, which is connected above the manhole cover ring via a hinge structure; a height adjustment mechanism, which is located between the base and the manhole cover ring, adjusts the spacing between the manhole cover ring and the base by stacking different numbers of gaskets, so as to adjust the height and flatness of the cover plate.

[0007] Preferably, the cross-section of the base is convex-shaped, comprising an inner ring and an annular outer ring, the lower side of the annular outer ring is connected to the shaft wall and the roadbed, the upper side of the annular outer ring is connected to the roadbed concrete, and the outer side of the inner ring is connected to the roadbed concrete.

[0008] Preferably, an inner step groove is formed on the inner side of the manhole cover ring, and the cover plate is embedded in the step groove; the cover plate and the step groove are rotatably connected via an opening-closing hinge and fixed by a locking structure.

[0009] Further, the locking structure comprises a cavity inside the manhole cover ring, a gear-rack mechanism is arranged inside the cavity, a spline is arranged at the top of a middle shaft of the gear, the rack is arranged horizontally, the end of the rack is a plug pin, and the plug pin penetrates through the cavity toward the cover plate; the locking structure further comprises a connecting buckle on a side wall of the cover plate and a special wrench matched with the spline, the end of the special wrench is provided with a spline groove, the spline is screwed by the special wrench to control the rotation of the gear and the horizontal movement of the rack, so as to realize the combination and separation of the end of the rack and the connecting buckle. Only a special tool can open the cover plate, which can prevent the cover plate from being stolen.

[0010] Preferably, a rubber gasket is further arranged between the cover plate and the step groove, and the rubber cushion can effectively reduce noise. Especially for urban roads with high population density, there is a large volume of vehicles at night, which generates frequent noise that seriously disturbs residents.

[0011] Preferably, a metal guard ring is further arranged outside the manhole cover ring, the base and the height adjustment mechanism, and the metal guard ring can be formed by selecting one or a plurality of metal guard rings to combine according to different heights of the cover plate.

[0012] Preferably, the roadbed concrete is topped with asphalt concrete, which is located on the outside of the manhole cover ring.

[0013] Preferably, the height adjustment mechanism includes washers, with a connecting block provided inside the washers. The connecting block has a vertical positioning hole. After several washers are stacked coaxially, a bolt assembly is installed in the positioning hole to fix the position of the washers.

[0014] Furthermore, the upper surface of the washer and the inner ring of the base is provided with positioning protrusions, and the lower surface of the washer and the manhole cover ring is provided with positioning grooves. When several washers are stacked, the positioning protrusions and the positioning grooves are engaged to ensure that the axes of several washers are the same.

[0015] Furthermore, the washers include standard washers of uniform thickness and non-standard washers of varying thicknesses. Standard cast iron shims are also included, each capable of increasing the thickness by 4 cm. These shims can be added as needed to address uneven settlement, with the number determined by the settlement pattern. A maximum of 10 cast iron shims can be added to address uniform settlement. Non-standard cast iron shims have a height of 6 cm on one side and 3 cm on the other. In cases of uneven settlement, these shims can be adjusted to improve the flatness of the cover plate surface.

[0016] Preferably, the lower base is wider and larger than that of a typical cast iron manhole base, so that the weight is not only borne by the manhole ring below, but also by 60% of the force distributed to the concrete subgrade. This greatly reduces the possibility of settlement.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: Overall, compared to existing technologies, this utility model provides an adjustable height kiln cover. Attached Figure Description

[0018] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a perspective view of the manhole cover in this utility model; Figure 2 This is a cross-sectional view of the manhole cover in this utility model; Figure 3 This is a cross-sectional view of the manhole cover in its installed state according to this utility model; Figure 4 This is a perspective view of the manhole cover in the open state according to this utility model; Figure 5 This is a schematic diagram of the positioning protrusion and positioning groove in this utility model; Figure 6 This is a schematic diagram of the locking structure in this utility model; Figure 7 This is a schematic diagram of the specially designed wrench in this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] Example 1 This embodiment provides an adjustable-height manhole cover. The design of this manhole cover fully considers various needs in actual use, aiming to solve the problems of traditional manhole covers in terms of height adjustment and flatness. (See also...) Figure 1-4 This height-adjustable manhole cover mainly includes the following key components: The base 1 has a shaft wall 4 and a roadbed 5 on its lower side, and a roadbed concrete 6 on its upper side; The manhole cover ring 2, with the same diameter as the base 1, is stacked vertically on top of the base 1; The cover plate 3 is connected above the manhole cover ring 2 via a hinge structure 9; The height adjustment mechanism 8 is located between the base 1 and the manhole cover ring 2. By stacking different numbers of washers 804, the distance between the manhole cover ring 2 and the base 1 is adjusted, thereby adjusting the height and flatness of the cover plate 3.

[0021] The base 1 is a basic support part of the entire manhole cover structure. The lower side of the base 1 closely fits the hoistway wall 4 and the roadbed 5, providing stable bottom support for the manhole cover; the upper side is connected to the roadbed concrete 6, ensuring the integrity with the road surface. In terms of cross-sectional shape, the cross-section of the base 1 is designed in a "convex" shape, and this unique shape has many advantages. It comprises an inner ring 101 and an annular outer ring 102. The lower side of the annular outer ring 102 is in contact with the hoistway wall 4 and the roadbed 5, the upper side is combined with the roadbed concrete 6, and the outer side of the inner ring 101 is also wrapped by the roadbed concrete 6. This structure enables the base 1 to disperse pressure better and enhance stability. Moreover, compared with an ordinary cast iron well seat, the lower base 1 has a specifically widened and enlarged bottom plate. This design is of great significance: it not only relies on the lower well ring to bear the weight, but can also disperse 60% of the force to the concrete roadbed 5. As a result, the possibility of settlement of the manhole cover is greatly reduced, the service life of the manhole cover is effectively prolonged, and the maintenance cost is reduced.

[0022] The cover ring 2 has the same diameter as the base 1, and it is steadily stacked above the base 1 along the vertical direction. An embedded stepped groove 201 is arranged on the inner side of the cover ring 2, and this stepped groove 201 provides an accurate position for the installation of the cover plate 3. The cover plate 3 is embedded in the stepped groove 201, and is rotationally connected with the stepped groove 201 via a hinge structure 9, preferably an opening-closing hinge. This connection mode enables the cover plate 3 to be opened and closed conveniently. Meanwhile, in order to ensure the stability of the cover plate 3 in the closed state, it is also fixed by a locking structure 11, preventing potential safety hazards caused by accidental opening of the cover plate 3. The cover plate 3 is connected above the cover ring 2 via the hinge structure 9, and this connection mode enables the cover plate 3 to rotate around the hinge, which facilitates operations such as maintenance by staff.

[0023] The height adjusting mechanism 8 is located between the base 1 and the cover ring 2, and is the core innovative part of the present manhole cover. It adjusts the spacing between the cover ring 2 and the base 1 by stacking different numbers of gaskets 804, thereby realizing the adjustment of the height and flatness of the cover plate 3. In actual use, according to the actual situation of the road surface, staff can flexibly increase or decrease the number of gaskets 804, so that the cover plate 3 is perfectly flush with the road surface, improving the comfort and safety of driving.

[0024] In this embodiment, a layer of asphalt concrete 13 is further laid above the roadbed concrete 6, and the asphalt concrete 13 is located outside the cover ring 2. The asphalt concrete 13 has good elasticity and wear resistance, which can further enhance the flatness and comfort of the road surface, and can also reduce the impact on the manhole cover when vehicles pass.

[0025] To better protect the manhole cover structure, a metal protective ring 12 is installed between the outer side of the cover ring, base 1, and height adjustment mechanism 8 and the asphalt concrete 13 and roadbed concrete 6. The metal protective ring 12 can be selected or combined in several ways depending on the height of the cover plate 3. It acts like a sturdy armor, preventing external factors from damaging the internal structure of the manhole cover and extending its service life.

[0026] In this embodiment, the surface of the cover plate 3 is provided with anti-slip textured protrusions 15, and the lower surface is provided with mesh-like reinforcing beams 16 to improve the structural strength of the cover plate 3.

[0027] In this embodiment, all components of the manhole cover are made of cast iron.

[0028] Example 2 Based on Embodiment 1, this embodiment proposes a preferred implementation of the locking structure 11. The locking structure 11 plays a crucial role in the safety and anti-theft performance of the manhole cover.

[0029] See Figure 6-7 The locking structure 11 includes a cavity 111 inside the manhole cover ring 2, which provides space for the installation of the locking mechanism. A gear 112 and rack 114 mechanism is installed inside the cavity 111. The gear 112 and rack 114 cooperate with each other to achieve precise motion control. A spline 113 is provided at the top of the intermediate shaft of the gear 112. The design of the spline 113 allows the gear 112 to be operated using a specific tool. The rack 114 is horizontally positioned, with a pin 115 at its end. The pin 115 passes through the cavity 111 towards the cover plate 3. When the rack 114 moves, the pin 115 can engage with a corresponding structure on the cover plate 3.

[0030] It also includes a connecting buckle 116 on the side wall of the cover plate 3 and a special wrench 117 that mates with the spline 113. The end of the special wrench 117 has a spline groove 118; this special design means that the spline 113 can only be operated using the special wrench 117. In actual use, turning the spline 113 with the special wrench 117 controls the rotation of the gear 112, which in turn drives the rack 114 to move horizontally. When the rack 114 moves horizontally, the pin 115 at its end engages or disengages from the connecting buckle 116 on the side wall of the cover plate 3. When the pin 115 engages with the connecting buckle 116, the cover plate 3 is firmly locked and cannot be easily opened; when it is necessary to open the cover plate 3, the special wrench 117 is used in reverse to disengage the pin 115 from the connecting buckle 116, thus opening the cover plate 3. This locking structure 11, which requires a special tool to open the cover plate 3, effectively prevents theft of the cover plate 3. In real life, theft of cover plates 3 not only damages public facilities but also poses safety hazards to pedestrians and vehicles. The locking structure 11 in this embodiment can effectively solve this problem and ensure the safe operation of urban infrastructure.

[0031] Example 3 Based on embodiments 1 and 2, this embodiment proposes a preferred implementation of the height adjustment mechanism 8. A well-designed height adjustment mechanism 8 is crucial to ensuring that the manhole cover can adapt to different road surface conditions.

[0032] The height adjustment mechanism 8 mainly includes washers 804, which are the basic components for height adjustment. A connecting block 801 is provided inside the washer 804, and the connecting block 801 has a vertical positioning hole 802. Several washers 804 are stacked coaxially, and a bolt assembly 803 is installed in the positioning hole 802. The bolt assembly 803 consists of a high-strength long bolt and a hexagonal nut, which firmly fixes the washers 804 together, ensuring the stability of the washer 804's position. This fixing method is simple and reliable, ensuring that the washers 804 will not loosen or shift during long-term use.

[0033] For further details, please refer to [link / reference]. Figure 5 To ensure the accuracy of the stacked washers 804, positioning protrusions 7 are provided on the upper surfaces of the washers 804 and the inner ring 101 of the base 1, and positioning grooves 14 are provided on the lower surfaces of the washers 804 and the manhole cover ring 2. When several washers 804 are stacked, the positioning protrusions 7 and the positioning grooves 14 are precisely engaged, which ensures that the axes of the several washers 804 are the same and avoids misalignment, thereby ensuring the flatness of the cover plate 3 after adjustment.

[0034] Furthermore, the washers 804 include standard washers 804 of uniform thickness and non-standard washers 804 of varying thickness. Standard cast iron lifting shims are also included, each increasing the height by 4 cm. Once overall settlement of the cover plate occurs, the number of cast iron lifting shims can be determined based on the settlement situation. Up to 10 cast iron lifting shims can be added to address uniform settlement issues. For example, when the road surface experiences overall settlement due to long-term use or geological reasons, workers can increase the number of standard washers 804 to raise the height of the cover plate 3, keeping it flush with the road surface.

[0035] The design of non-standard cast iron heightening shims is more flexible, with one side being 6 cm high and the other 3 cm high. When uneven settlement occurs, the placement of the non-standard cast iron heightening shims can be adjusted, utilizing their uneven height to adjust the flatness of the cover plate 3 surface. For example, if one side of the road surface has sunk more, the higher side can be placed towards the direction of subsidence, thus compensating for the height difference caused by uneven settlement and ensuring the flatness of the cover plate 3 and driving safety.

[0036] Example 4 Based on embodiments 1, 2, and 3, this embodiment proposes a preferred implementation of the noise reduction structure of the cover plate 3. Noise from manhole covers has long plagued residents in urban roads, especially in densely populated areas where heavy traffic and frequent noise at night severely impact the quality of life for citizens.

[0037] A rubber washer 10 is also provided between the cover plate 3 and the step groove 201. The rubber washer 10 has good elasticity and shock absorption performance. When a vehicle drives over the cover plate 3, the cover plate 3 will vibrate due to the impact force of the vehicle. The rubber washer 10 can effectively absorb and disperse this vibration energy, reducing the collision force between the cover plate 3 and the step groove 201, thereby effectively reducing noise. Compared with traditional manhole covers without noise reduction structures, the noise level can be significantly reduced after the rubber washer 10 is installed. For example, when a vehicle passes over the cover plate 3 at a certain speed, the cover plate 3 without the rubber washer 10 may produce a large amount of noise, while the noise level can be greatly reduced after the rubber washer 10 is installed, creating a quieter living environment for citizens. At the same time, the use of the rubber washer 10 can also reduce the wear and tear on the cover plate 3 and the step groove 201 caused by frequent collisions, extend the service life of the manhole cover, and reduce maintenance costs.

[0038] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A height-adjustable kiln well cover, characterized in that, Comprising: a base, the lower side of which is a shaft wall and a road base, and the upper side of which is road base concrete; a manhole cover ring, which has the same diameter as the base and is stacked above the base in a vertical direction; a cover plate, connected above the manhole cover ring via a hinge structure; a height adjustment mechanism, located between the base and the manhole cover ring, which adjusts the spacing between the manhole cover ring and the base by stacking gaskets of different quantities.

2. The adjustable height kiln manhole cover according to claim 1, characterized in that, The cross section of the base is in a "convex" shape, comprising an inner ring and an annular outer ring; the lower side of the annular outer ring is the shaft wall and the road base, the upper side of the annular outer ring is the road base concrete, and the outer side of the inner ring is the road base concrete.

3. The adjustable height kiln manhole cover according to claim 1, characterized in that, The inner side of the manhole cover ring is provided with an embedded stepped groove, and the cover plate is embedded in the stepped groove; the cover plate and the stepped groove are rotationally connected via an opening-closing hinge and fixed by a locking structure.

4. The adjustable height kiln manhole cover according to claim 3, characterized in that, The locking structure comprises a cavity inside the manhole cover ring, a gear-rack mechanism is arranged inside the cavity, a spline is arranged at the top of the intermediate shaft of the gear, the rack is horizontally arranged, the end of the rack is a plug pin, and the plug pin penetrates through the cavity toward the cover plate; the locking structure further comprises a connecting buckle on the side wall of the cover plate and a special wrench matched with the spline, the end of the special wrench is provided with a spline groove, the spline is screwed by the special wrench to control the rotation of the gear and the horizontal movement of the rack, thereby realizing the combination and separation between the end of the rack and the connecting buckle.

5. The adjustable height kiln manhole cover according to claim 1, characterized in that, A rubber gasket is further arranged between the cover plate and the stepped groove.

6. The adjustable height kiln manhole cover according to claim 1, characterized in that, A metal guard ring is further arranged outside the manhole cover ring, the base and the height adjustment mechanism, and the metal guard ring can be formed by selecting one or a plurality of combinations according to different heights of the cover plate.

7. The adjustable height kiln manhole cover according to claim 1, characterized in that, Asphalt concrete is arranged above the road base concrete, and the asphalt concrete is located outside the manhole cover ring.

8. The adjustable height kiln manhole cover according to claim 1, characterized in that, The height adjustment mechanism comprises gaskets, a connecting block is arranged on the inner side of the gasket, a vertical positioning hole is arranged on the connecting block, after a plurality of gaskets are stacked coaxially, a bolt assembly is installed in the positioning hole.

9. The adjustable height kiln manhole cover according to claim 8, characterized in that, Positioning protrusions are arranged on the upper surfaces of the gasket and the inner ring of the base, positioning grooves are arranged on the lower surfaces of the gasket and the manhole cover ring, and when a plurality of gaskets are stacked, the positioning protrusions are fitted with the positioning grooves.

10. The adjustable height kiln manhole cover according to claim 9, characterized in that, The gaskets comprise standard gaskets with consistent thickness and non-standard gaskets with inconsistent thickness.

Images