Anti-settling silent well lid

Abstract

This invention relates to the field of manhole cover technology, and more particularly to an anti-settlement silent manhole cover, comprising a base and a cover body disposed on the base. The base includes a lower support portion, a conical connecting portion, and an upper support portion arranged sequentially from bottom to top. A silent washer is detachably disposed within the upper support portion. The silent washer includes a support ring and silent components. The upper end face of the support ring has circumferentially distributed adjustment grooves, and several silent components are disposed within the adjustment grooves. The lower end face of the support ring has a convex ring with a right-angled trapezoidal cross-section. The inner side of the upper support portion has several circumferentially distributed positioning grooves and mounting screw holes. An arc-shaped fixing wedge is connected to the mounting screw hole via a stud. A sliding strip is disposed at the bottom of the arc-shaped fixing wedge, and the sliding strip is slidably disposed within the upper support portion. The support ring is connected to the cover body. Using the above-mentioned anti-settlement silent manhole cover solves the technical problems of manhole cover settlement, abnormal noise, and easy displacement of components, and reduces maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of manhole cover technology, and in particular to a settlement-preventing and silent manhole cover. Background Technology

[0002] Cast iron manhole covers are widely used on urban roads. These covers bear the brunt of vehicle traffic, road surface loads, and roadbed settlement over extended periods. The reliability of the fit between the base and the surrounding roadbed concrete directly determines the overall lifespan of the manhole cover and road safety. Most existing conventional manhole cover bases employ a simple single-stage ring structure. The interface between the base and the surrounding concrete is relatively smooth, lacking an effective anchoring and interlocking structure. Under repeated vehicle impacts, the base is prone to peeling and loosening from the surrounding concrete, leading to settlement problems such as tilting and sinking. After settlement, a misalignment occurs between the cover and the base support, easily causing the cover to jump, produce impact noises, and in severe cases, even shift, posing a road safety hazard.

[0003] Meanwhile, some manhole covers on the market with noise reduction functions often have their noise-reducing washers simply laid flat on the base support platform. The washers are integral rubber ring structures, installed using a simple placement method without dedicated positioning, locking, or height adjustment structures. Due to the influence of casting machining tolerances and on-site construction and installation errors, the fit clearance after the cover is seated is difficult to control. The washers are not adjustable; excessive clearance will cause impact noise, while insufficient clearance will cause the cover to jam when opening and closing. Assembly gaps cannot be compensated for, and the washers are prone to aging and compression failure. After failure, the cover directly collides with the base metal, producing a clanging noise during driving. Damaged washers require complete disassembly and reassembly, resulting in high maintenance costs. The washers rely solely on the cover's own weight or the groove structure for positioning. With continuous vibration from vehicle movement, the washers are prone to circumferential movement and radial displacement. Once the washers shift, the noise reduction and buffering function immediately fails. Summary of the Invention

[0004] The purpose of this invention is to provide a settlement-resistant and silent manhole cover with an adjustable support ring height for adjustment during overall settlement. The silent gasket is detachable for easy maintenance and replacement. This invention addresses the technical problems of manhole cover settlement, abnormal noise, and easy component displacement from multiple dimensions, including base anchoring, buffering and noise reduction, and adjustable locking.

[0005] To achieve the above objectives, the present invention provides an anti-settlement silent manhole cover, comprising a base and a cover body disposed on the base. The base includes a lower support portion, a conical connecting portion, and an upper support portion arranged sequentially from bottom to top. A silent washer is detachably disposed within the upper support portion. The silent washer includes a support ring and silent components. A circularly distributed adjustment groove is formed on the upper end face of the support ring, and several silent components are disposed within the adjustment groove. A convex ring with a right-angled trapezoidal cross-section is formed on the lower end face of the support ring. Several circularly distributed positioning grooves and mounting screw holes are formed on the inner side of the upper support portion. An arc-shaped fixing wedge is connected to the mounting screw hole through a stud. A sliding strip is provided at the bottom of the arc-shaped fixing wedge, and the sliding strip is slidably disposed within the upper support portion. The support ring is connected to the cover body.

[0006] Preferably, the noise reduction component includes a connecting screw, which is threadedly connected to the inner wall of the adjusting groove. A noise reduction sleeve is provided at the top of the connecting screw, and a connecting groove is provided at the bottom of the connecting screw. The connecting groove is threadedly connected to one end of a supporting screw, and a fixing magnet is provided at the other end of the supporting screw.

[0007] Preferably, the bottom of the silent sleeve has a slot, and the top of the silent sleeve has a horizontal twisted wire and a vertical spring. The vertical spring is located in the middle of the top of the silent sleeve, and the two horizontal twisted wires are symmetrically arranged on both sides of the vertical spring.

[0008] Preferably, the lower support part is a ring structure or a rectangular structure with through holes. The lower support part has several positioning through holes, and reinforcing support plates are distributed around the upper circumference of the lower support part. The reinforcing support plates are connected to the outer side of the conical connecting part.

[0009] Preferably, a fall-prevention net plate is provided on the inner side of the conical connecting part, and a plurality of guide grooves are opened on the inner side of the conical connecting part. A net-pressing assembly is provided in the guide groove. The net-pressing assembly includes a connecting plate and a pressing plate. A float is provided at the lower end of the connecting plate. The float is slidably disposed in the guide groove. The upper end of the connecting plate is connected to one end of the pressing plate. The middle part of the pressing plate is rotatably connected in the guide groove.

[0010] Preferably, a fixing ring is provided on the outer side of the upper support, and at least two parallel annular fixing grooves are provided on the outer circumference of the fixing ring for fixing the supporting steel bars.

[0011] Preferably, a connecting lug is provided on the circumferential side of the cover, and a hinge or manhole cover lock is provided on the connecting lug, which is connected to the support ring.

[0012] Preferably, the cover has a first drain hole, a second drain hole, and a third drain hole. The third drain hole is located at the center of the cover. The second drain holes are arranged in at least two rings, with each ring of second drain holes evenly distributed around the circumference. A wavy guide protrusion is provided on the cover between adjacent second drain holes in the same ring. One end of the wavy guide protrusion is positioned opposite to the third drain hole, and the other end of the wavy guide protrusion is positioned opposite to the tail of the first drain hole.

[0013] Preferably, a plurality of first drain holes are provided and evenly distributed around the circumference. The first drain holes include straight sections and arc sections. A blocking mechanism is provided inside the first drain holes. The blocking mechanism includes an upper follower float and a guide plate. The upper follower float includes a straight plate and an arc plate. A railing is provided on the lower side of both the straight plate and the arc plate. The included angle between the straight plate and the arc plate is an obtuse angle, and the included angle between the straight plate and the upper end face of the cover is an acute angle. The guide plate is slidably disposed inside the first drain holes, and one end of the guide plate is fixed at the connection between the straight plate and the arc plate. A limit plate is provided at the other end of the guide plate.

[0014] Preferably, the base, cover, support ring, fixing ring, and arc-shaped fixing wedge are all made of ductile iron.

[0015] Therefore, the beneficial effects of the above-mentioned anti-settlement silent manhole cover of the present invention are as follows: (1) A three-level layered base structure consisting of a lower support, a conical connecting part, and an upper support is set to improve the overall force transmission performance of the base. A detachable silent washer is set inside the upper support, and a right-angled trapezoidal convex ring is set at the lower end of the support ring. With the help of an arc-shaped fixing wedge with a slide bar, the slide bar achieves sliding guidance inside the base. The stud drives the arc-shaped fixing wedge to lock the convex ring. This not only enables the detachable assembly of the support ring, but also enables radial clamping and axial lifting positioning with the help of the inclined surface of the trapezoidal convex ring. This can compensate for the height deviation caused by settlement and has strong locking and vibration resistance.

[0016] (2) The support ring has an adjustment groove for arranging the silent components. The silent gasket is detachable, which is convenient for later maintenance and replacement. The technical problems of manhole cover settlement, abnormal noise and easy displacement of components are solved from multiple dimensions such as base anchoring, buffering and noise reduction and adjustable locking.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a settlement-resistant and noise-reducing manhole cover structure according to the present invention; Figure 2 This is a schematic diagram of the base structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the silent component; Figure 4 This is a cross-sectional view of the silent component; Figure 5 A sectional view showing the fit between the base and the support ring; Figure 6 This is a schematic diagram of an arc-shaped fixed wedge block structure; Figure 7 This is a schematic diagram showing the interaction between the anti-fall netting and the netting clamping assembly; Figure 8 This is a schematic diagram of the cover structure in Example 2; Figure 9 This is a schematic diagram of the blocking mechanism.

[0019] Figure Labels 1. Base; 11. Lower support; 111. Positioning through hole; 112. Reinforcing support plate; 12. Conical connecting part; 121. Guide groove; 13. Upper support; 131. Positioning groove; 312. Mounting screw hole; 14. Arc-shaped fixing wedge; 141. Sliding strip; 2. Cover; 21. Connecting ear; 22. First drain through hole; 23. Second drain through hole; 24. Third drain through hole; 25. Wavy guide protrusion; 3. Silent washer; 31. Support ring; 311. Adjustment groove; 312. Protruding ring; 32. Static Sound component; 321, connecting screw; 3211, connecting groove; 322, silent sleeve; 3221, horizontal twisted wire body; 3222, vertical spring body; 3223, slot; 323, supporting screw; 324, fixing magnet; 4, anti-fall net plate; 5, net pressing assembly; 51, connecting plate; 52, pressure plate; 53, float; 6, fixing ring; 61, annular fixing groove; 7, blocking mechanism; 71, upper follow-up float plate; 711, straight plate; 712, arc plate; 72, guide plate; 73, railing; 74, limit plate. Detailed Implementation

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used 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. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention from the specific circumstances.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] Example 1 like Figure 1 As shown, a settlement-preventing and silent manhole cover includes a base 1 and a cover body 2 disposed on the base 1. The base 1, cover body 2, support ring 31, fixing ring 6, and arc-shaped fixing wedge 14 are all made of ductile iron.

[0023] like Figure 2 As shown, the base 1 includes a lower support part 11, a conical connecting part 12, and an upper support part 13 arranged sequentially from bottom to top. In this embodiment, the lower support part 11 is a ring structure, but it can also be a rectangular structure with through holes. The lower support part 11 has several positioning through holes 111. During the pouring process, concrete enters the positioning through holes 111. After solidification, the base 1 and the surrounding concrete interlock and anchor, inhibiting the displacement and tilting of the manhole cover base 1 under vehicle pressure and resisting settlement. Reinforcing support plates 112 are distributed around the upper circumference of the lower support part 11. The reinforcing support plates 112 are connected to the outer side of the conical connecting part 12 to improve the support strength, increase the force transmission area, disperse the road load, improve the overall rigidity of the base 1, and reduce cracking of the base 1. The conical connecting part 12 adopts a bowl-like structure, and the load is transferred downward and inward, further reducing the probability of settlement of the base 1 edge due to compression.

[0024] A detachable sound-dampening washer 3 is provided inside the upper support part 13. The sound-dampening washer 3 includes a support ring 31 and sound-dampening components 32. The upper end surface of the support ring 31 has circumferentially distributed adjustment grooves 311, and several sound-dampening components 32 are disposed in the adjustment grooves 311, such as... Figures 3-4 As shown, the noise reduction component 32 includes a connecting screw 321, which is threaded to the inner wall of the adjusting groove 311. This allows for fine-tuning of the support gap between the support ring 31 and the cover 2, compensating for machining and installation errors, and ensuring the cover 2 fits snugly in place. A noise reduction sleeve 322 is provided at the top of the connecting screw 321. A slot 3223 is provided at the bottom of the noise reduction sleeve 322. A horizontal twisted wire 3221 and a vertical spring 3222 are embedded in the top of the noise reduction sleeve 322. The vertical spring 3222 is positioned at the middle of the top of the noise reduction sleeve 322. Two horizontal twisted wires 3221 are symmetrically arranged on both sides of the vertical spring 3222. The vertical spring 3222 provides vertical buffering, while the horizontal twisted wires 3221 absorb horizontal impact vibrations. When a vehicle runs over the cover 2, the noise reduction is achieved, eliminating the hard metal impact between the cover 2 and the base 1, thus achieving noise reduction. Furthermore, the noise reduction sleeve 322 is detachable and can be replaced individually after wear, eliminating the need to replace the entire manhole cover. The bottom of the connecting screw 321 is provided with a connecting groove 3211, which is threaded to one end of the support screw 323. The other end of the support screw 323 is provided with a fixing magnet 324, which can assist in magnetic attraction and positioning.

[0025] To achieve height adjustment and detachable connection of the support ring 31, a connection structure between the support ring 31 and the upper support part 13 was designed, such as... Figure 5 As shown, the lower end face of the support ring 31 is provided with a convex ring 312 with a right-angled trapezoidal cross-section. The inner side of the upper support part 13 has several circumferentially distributed positioning grooves 131 and mounting screw holes 312. Arc-shaped fixing wedges 14 are connected to the mounting screw holes 312 via studs. Figure 6 As shown, the bottom of the arc-shaped fixing wedge 14 is provided with a sliding strip 141, which slides inside the upper support part 13. The arc-shaped fixing wedge 14 slides and presses against the right-angled trapezoidal protruding ring 312 to lock and fix the support ring 31. The trapezoidal inclined surface can simultaneously provide radial clamping and axial upward lifting forces. In the event of overall settlement, after adjusting the height of the support ring 31, it is fixed by the arc-shaped fixing wedge 14 to achieve the adjustment of the overall height of the support ring 31. Then, concrete can be filled into the settlement area.

[0026] In this embodiment, a fall-prevention mesh plate 4 is also provided on the inner side of the tapered connecting part 12, such as... Figure 7 As shown, the inner side of the conical connecting part 12 is provided with several guide grooves 121. A net pressing assembly 5 is provided in the guide grooves 121. The net pressing assembly 5 includes a connecting plate 51 and a pressing plate 52. A float 53 is provided at the lower end of the connecting plate 51. The float 53 is slidably disposed in the guide groove 121. The upper end of the connecting plate 51 is connected to one end of the pressing plate 52. The middle part of the pressing plate 52 is rotatably connected in the guide groove 121. In the case of backflow, the float 53 moves along the guide groove 121, driving the connecting plate 51 to push one end of the pressing plate 52 upward. The pressing plate 52 is similar to the lever principle. The other end of the pressing plate 52 moves downward to press down the anti-fall net plate 4 and prevent the anti-fall net plate 4 from being washed away during backflow.

[0027] During manhole cover construction, reinforcing bars need to be installed around the manhole cover before concrete is poured. The existing manhole cover structure has a smooth outer wall, and the reinforcing bar structure requires a large number of supporting structures for support. At the same time, there will be positioning deviations. Therefore, a fixing ring 6 (in this embodiment, it is a threaded connection, and the height of the fixing ring 6 can be adjusted according to actual needs) is set on the outer side of the upper support part 13. At least two parallel annular fixing grooves 61 are opened on the outer circumference of the fixing ring 6. The annular fixing grooves 61 are used to fix the supporting reinforcing bars. During the construction stage, the reinforcing bars are directly inserted into the annular fixing grooves 61 to achieve pre-positioning of the reinforcing bars. There is no need to set up a large number of temporary supports. During pouring, the manhole cover base 1 and the reinforcing bar skeleton are integrated into one, further suppressing the later settlement and displacement. The height of the fixing ring 6 can be adjusted to adapt to different road thicknesses.

[0028] The support ring 31 is connected to the cover body 2. The cover body 2 has four connecting ears 21 on its circumference. In this embodiment, a manhole cover lock is provided on the connecting ears 21. The manhole cover lock is connected to the support ring 31. Alternatively, a hinge can be provided on one connecting ear 21 and a manhole cover lock can be provided on the other connecting ear 21.

[0029] Example 2 Compared with Example 1, the structure of the cover 2 is different in this embodiment, such as... Figure 8 As shown, in this embodiment, the cover 2 is provided with a first drain hole 22, a second drain hole 23, and a third drain hole 24. The third drain hole 24 is located at the center of the cover 2. The second drain holes 23 are arranged in at least two rings, with each ring of second drain holes 23 evenly distributed around its circumference. A wavy guide protrusion 25 is provided on the cover 2 between adjacent second drain holes 23 in the same ring. One end of the wavy guide protrusion 25 is positioned opposite to the third drain hole 24, and the other end is positioned opposite to the tail of the first drain hole 22. Figure 8 As shown, several first drain holes 22 are provided and evenly distributed around the circumference. Each first drain hole 22 includes a straight section and an arc section. A blocking mechanism 7 is provided inside the first drain hole 22, such as... Figure 9 As shown, the blocking mechanism 7 includes an upper follower float 71 and a guide plate 72. The upper follower float 71 includes a straight plate 711 and an arc plate 712. Both the straight plate 711 and the arc plate 712 are provided with railings 73 on their lower sides. The railings 73 are cylindrical or plate-shaped structures. The diameter of the cylindrical structure is slightly smaller than the width of the first drain hole 22 to prevent debris from getting stuck in the gap and causing the upper follower float 71 to fail to sink. The included angle between the straight plate 711 and the arc plate 712 is an obtuse angle, and the included angle between the straight plate 711 and the upper end face of the cover 2 is an acute angle. The guide plate 72 is slidably disposed in the first drain hole 22, and one end of the guide plate 72 is fixed at the connection between the straight plate 711 and the arc plate 712. The other end of the guide plate 72 is provided with a limit plate 74.

[0030] When the water level rises, the upper follower float 71 moves upward. The upper follower float 71 and the guide plate 72 have a triangular structure, which blocks debris on the outer ring. Water is discharged through the first drain hole 22, the second drain hole 23 and the third drain hole 24. At the same time, when a vehicle passes by, the upper follower float 71 can be pressed down smoothly due to the triangular structure, allowing the vehicle to pass smoothly. When the water level drops, the float falls back to its original position.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An anti-settling silent well lid, comprising a base (1) and a cover (2) arranged on the base (1), characterized in that: The base (1) includes a lower support part (11), a conical connecting part (12), and an upper support part (13) arranged sequentially from bottom to top. A detachable sound-dampening washer (3) is provided inside the upper support part (13). The sound-dampening washer (3) includes a support ring (31) and sound-dampening components (32). The upper end face of the support ring (31) is provided with a circumferentially distributed adjustment groove (311), and several sound-dampening components (32) are arranged in the adjustment groove (311). The lower end face is provided with a convex ring (312) with a right trapezoidal cross section. The inner side of the upper support part (13) is provided with several circumferentially distributed positioning grooves (131) and mounting screw holes (312). The mounting screw holes (312) are connected to an arc-shaped fixing wedge (14) by a stud. The bottom of the arc-shaped fixing wedge (14) is provided with a slide (141). The slide (141) is slidably set in the upper support part (13). The support ring (31) is connected to the cover (2).

2. A sink-preventing silent well lid according to claim 1, characterized in that: The noise reduction assembly (32) includes a connecting screw (321), which is threaded to the inner wall of the adjusting groove (311). A noise reduction sleeve (322) is provided on the top of the connecting screw (321), and a connecting groove (3211) is provided on the bottom of the connecting screw (321). The connecting groove (3211) is threaded to one end of a support screw (323), and a fixing magnet (324) is provided on the other end of the support screw (323).

3. A sink-preventing silent well lid according to claim 2, characterized in that: The bottom of the silent sleeve (322) has a slot (3223), and the top of the silent sleeve (322) is inlaid with a horizontal twisted wire body (3221) and a vertical spring body (3222). The vertical spring body (3222) is located in the middle of the top of the silent sleeve (322), and the two horizontal twisted wire bodies (3221) are symmetrically arranged on both sides of the vertical spring body (3222).

4. A sink-preventing silent well lid according to claim 3, characterized in that: The lower support part (11) is a ring structure or a rectangular structure with through holes. The lower support part (11) has several positioning through holes (111). The lower support part (11) has reinforcing support plates (112) distributed around its upper circumference. The reinforcing support plates (112) are connected to the outer side of the conical connecting part (12).

5. A sink-preventing silent well lid according to claim 4, characterized in that: A fall-prevention net plate (4) is provided on the inner side of the conical connecting part (12). Several guide grooves (121) are opened on the inner side of the conical connecting part (12). A net pressing assembly (5) is provided in the guide groove (121). The net pressing assembly (5) includes a connecting plate (51) and a pressing plate (52). A float (53) is provided at the lower end of the connecting plate (51). The float (53) is slidably disposed in the guide groove (121). The upper end of the connecting plate (51) is connected to one end of the pressing plate (52). The middle part of the pressing plate (52) is rotatably connected in the guide groove (121).

6. The anti-settlement silent manhole cover according to claim 5, characterized in that: A fixing ring (6) is provided on the outer side of the upper support (13). At least two parallel annular fixing grooves (61) are provided on the outer circumference side of the fixing ring (6). The annular fixing grooves (61) are used to fix the supporting steel bars.

7. A sink-proof silent well lid according to claim 6, characterized in that: The cover (2) has a connecting ear (21) on its circumference. A hinge or well cover lock is provided on the connecting ear (21), and the hinge or well cover lock is connected to the support ring (31).

8. A settlement-resistant and silent manhole cover according to claim 7, characterized in that: The cover (2) is provided with a first drain hole (22), a second drain hole (23) and a third drain hole (24). The third drain hole (24) is located at the center of the cover (2). The second drain hole (23) is provided in at least two rings. The second drain hole (23) is evenly distributed around the circumference of each ring. The cover (2) between adjacent second drain holes (23) in the same ring is provided with a wavy guide protrusion (25). One end of the wavy guide protrusion (25) is opposite to the third drain hole (24), and the other end of the wavy guide protrusion (25) is opposite to the tail of the first drain hole (22).

9. A settlement-resistant and silent manhole cover according to claim 8, characterized in that: The first drainage through hole (22) is provided with several holes evenly distributed around the circumference. The first drainage through hole (22) includes a straight section and an arc section. A blocking mechanism (7) is provided inside the first drainage through hole (22). The blocking mechanism (7) includes an upper follower float (71) and a guide plate (72). The upper follower float (71) includes a straight plate (711) and an arc plate (712). A railing (73) is provided on the lower side of both the straight plate (711) and the arc plate (712). The included angle between the straight plate (711) and the arc plate (712) is an obtuse angle, and the included angle between the straight plate (711) and the upper end face of the cover (2) is an acute angle. The guide plate (72) is slidably provided inside the first drainage through hole (22). One end of the guide plate (72) is fixed at the connection between the straight plate (711) and the arc plate (712). A limit plate (74) is provided at the other end of the guide plate (72).

10. A settlement-resistant and silent manhole cover according to claim 9, characterized in that: The base (1), cover (2), support ring (31), fixing ring (6) and arc-shaped fixing wedge (14) are all made of ductile iron.

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