Double-layer well lid

Abstract

The utility model discloses a double-layer well lid which comprises a base, two steps are arranged on the inner wall of the base, a first well lid body is arranged on the first step of the inner wall of the base, a second well lid body is arranged on the second step of the inner wall of the base, and the second well lid body comprises a pressing assembly and a sealing cover plate. A load-bearing seat ring is arranged between the sealing cover plate and the second-stage step, the load-bearing seat ring is fixed to the second-stage step, and the pressing assembly is used for pressing the sealing cover plate to the load-bearing seat ring; the pressing assembly comprises a pressing rod, a rotating shaft and a buckling piece, one end of the pressing rod is hinged to the rotating shaft, the other end of the pressing rod rotates around the rotating shaft, the rotating shaft is fixed to the second step, and the buckling piece buckles the movable end of the pressing rod. The double-layer well lid is simple in structure and easy to operate, operation difficulty is reduced on the premise that sealing performance is not affected, and working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, specifically to a double-layer manhole cover. Background Technology

[0002] Double-layer manhole covers are mainly used in underground facilities that require frequent opening and maintenance, such as gas wells, industrial parks, main urban roads and busy streets, residential areas and areas around schools. These scenarios have high requirements for the safety, sealing and ease of operation of underground manholes.

[0003] Traditionally, double-layered manhole covers requiring airtight waterproofing have been sealed using bolted flanges. However, opening and closing these flanges is time-consuming and labor-intensive, requiring individual bolt turning, which can lead to rust and further difficulty in opening if left unused for extended periods. For example, Chinese patent CN109137994A discloses a "concrete steel fiber double-layered reinforced manhole cover," which falls into this category. It uses a buffer device; when the first cover is pressured by a pressure plate, a connecting rod pushes two first sliders within a first groove, which are then pulled by a second spring. A threaded sleeve is also used; rotating the nut rotates the threaded rod, allowing it to pull up the second cover through the threaded sleeve. However, this method does not allow for rapid opening. Utility Model Content

[0004] The purpose of this utility model is to provide a double-layer manhole cover that is convenient and has good sealing performance.

[0005] The technical solution adopted by the easy-to-use double-layer manhole cover disclosed in this utility model is:

[0006] A double-layer manhole cover includes a base, the inner wall of which has two steps. A first manhole cover is mounted on the first step of the inner wall of the base, and a second manhole cover is mounted on the second step of the inner wall of the base.

[0007] The second manhole cover includes a pressing assembly and a sealing cover plate. A load-bearing seat is provided between the sealing cover plate and the second step. The load-bearing seat is fixed on the two steps. The pressing assembly is used to press the sealing cover plate against the load-bearing seat.

[0008] The pressing assembly includes a pressure rod, a rotating shaft, and a fastener. One end of the pressure rod is hinged to the rotating shaft, and the other end rotates around the rotating shaft. The rotating shaft is fixed on the second-level step, and the fastener engages the movable end of the pressure rod.

[0009] As a preferred embodiment, the sealing cover includes a sealing cover and a gasket, the sealing cover is adapted to the load-bearing seat ring, and the contact surface between the load-bearing seat ring and the sealing cover is covered with a gasket.

[0010] As a preferred embodiment, the fastener includes a baffle and a fastening position, the baffle being rotatable and fastening onto the fastening position.

[0011] As a preferred embodiment, the base is further provided with at least two anchor rods, one end of which is fixed to the pressing assembly, and the other end is fixed to the second step.

[0012] As a preferred embodiment, the pressing assembly further includes pressure pads, at least two of which are fixed to the side of the pressure rod facing the sealing cover.

[0013] As a preferred embodiment, the first manhole cover is a grid structure.

[0014] As a preferred embodiment, the sealed cover plate has a certain tilt angle, forming a depression in the second-level step, and the depression is provided with a drain outlet.

[0015] As a preferred embodiment, the first manhole cover is secured with a chain, and the second manhole cover is also equipped with a handle.

[0016] The beneficial effects of the double-layer manhole cover disclosed in this utility model are as follows: This utility model designs a double-layer manhole cover, in which a first manhole cover and a second manhole cover are respectively set on two steps inside the bottom. Through the combination of pressure rod, rotating shaft and fastener in the second manhole cover, the sealing cover plate can be squeezed and fixed. The pressure rod can rotate around the rotating shaft and is fixed by the fastener when pressed, making the opening and closing of the second manhole cover simple and quick. This design reduces the difficulty of operation and improves work efficiency. Moreover, a load-bearing seat ring is provided between the sealed cover plate and the second step, and a gasket is laid. When the pressing component is in the pressing state, it can squeeze the gasket under the sealed cover plate to fit tightly against the load-bearing seat ring, effectively improving the sealing performance of the manhole cover. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the double-layer manhole cover of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the second manhole cover of this utility model double-layer manhole cover.

[0019] Figure 3 This is a schematic diagram of the rotating shaft structure of the pressing component of this utility model.

[0020] Figure 4 This is a cross-sectional view of the rotating shaft 1-1 of the pressing assembly of this utility model.

[0021] Figure 5 This is a cross-sectional view of the rotating shaft 2-2 of the pressing assembly of this utility model.

[0022] Figure 6This is a schematic diagram of the snap-fit ​​structure of the pressing assembly of this utility model.

[0023] Figure 7 This is a sectional view of the snap fastener of the pressing assembly of this utility model (section 3-3).

[0024] Figure 8 This is a sectional view of the snap fastener of the pressing assembly of this utility model, section 4-4. Detailed Implementation

[0025] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0026] Please refer to Figure 1 A double-layer manhole cover includes a base, the inner wall of which has two steps. The first step 1 of the inner wall of the base is provided with a first manhole cover 11, and the second step 2 of the inner wall of the base is provided with a second manhole cover 21.

[0027] Please refer to Figure 1 and Figure 2 The second manhole cover includes a pressing assembly and a sealing cover plate. A load-bearing seat is provided between the sealing cover plate and the second step. The load-bearing seat is fixed on the two steps. The pressing assembly is used to press the sealing cover plate against the load-bearing seat.

[0028] The second manhole cover 21 includes a pressing assembly 211 and a sealing cover plate 212. A load-bearing seat ring is provided between the sealing cover plate 212 and the second step 2. The load-bearing seat ring is fixed on the second step 2. The pressing assembly 211 is used to press the sealing cover plate 212 against the load-bearing seat ring 3.

[0029] Please refer to Figures 2-8 The pressing assembly 211 includes a pressing rod 2111, a rotating shaft 2112, and a fastening member 2113. One end of the pressing rod 2111 is hinged to the rotating shaft 2112, and the other end rotates around the rotating shaft 2112. The rotating shaft 2112 is fixed on the second step 2, and the movable end of the pressing rod 2111 can be fastened in the fastening member 2113.

[0030] The second manhole cover 21 also includes a washer 214, which is laid on the contact surface between the load-bearing seat 3 and the sealing cover 212. The washer 214 laid on the contact surface between the load-bearing seat 3 and the sealing cover 212 can fill small gaps, increase sealing and buffer pressure. The material of the washer 214 is usually soft rubber, silicone or other elastic materials with good sealing properties.

[0031] When the pressing assembly 211 is pressed down, it compresses the sealing cover plate 212, reducing the gap between the sealing cover plate 212 and the load-bearing washer 214. When the pressing assembly 211 is pressed down, the sealing cover plate 212 is subjected to pressure and squeezes the washer 214, causing it to deform and fill any gaps between them, thereby achieving a tighter seal.

[0032] When the manhole cover is not closed, the pressure rod 2111 of the pressing assembly 211 is in a non-pressed state, and its movable end is not fastened in the buckle 2113. The sealing cover 212 is placed on the load-bearing seat 3, and a certain gap is maintained between the two through the washer 214. When it is necessary to close the manhole cover, the operator will push or rotate the movable end of the pressure rod 2111, causing it to rotate downward around the pivot 2112. As the pressure rod 2111 is gradually pressed down, its end will approach the buckle 2113 and eventually be fastened inside, thereby fixing the pressure rod 2111 in the pressed position. During the pressing process of the pressure rod 2111, the sealing cover 212 is subjected to pressure from the pressure rod 2111, which in turn squeezes the washer 214. Due to the softness and elasticity of the material, the washer 214 will begin to deform and fill any gap between the load-bearing seat 3 and the sealing cover 212. This deformation process not only enhances the sealing effect but also reduces the direct impact on the second manhole cover 21 through a buffering effect. When the pressure rod 2111 is fully engaged with the fastener 2113, the gap between the sealing cover plate 212 and the load-bearing seat ring 3 is completely filled by the gasket 214, forming a tight sealing structure. At this time, the second manhole cover 21 is effectively sealed, making it difficult for external substances to enter and ensuring the safe operation of the facilities inside the second manhole cover 21. When it is necessary to open the manhole cover for maintenance or repair, the operator only needs to release the engagement between the pressure rod 2111 and the fastener 2113, allowing the pressure rod 2111 to rotate upward around the pivot 2112 and return to its initial position. As the pressure rod 2111 rises, the pressure between the sealing cover plate 212 and the load-bearing seat ring 3 is released, the gasket 214 gradually returns to its original shape, and the manhole cover can be easily opened.

[0033] Please refer to Figure 1 The base also contains at least two anchor rods 23. One end of each anchor rod 23 is fixed to the pressing assembly 211, and the other end is fixed to the second step 2. As a key component connecting the pressing assembly 211 and the second step, the anchor rod 23 disperses the pressure generated by the pressing assembly 211 in the closed state, provides additional support for the pressing assembly 211, and prevents deformation or damage caused by excessive pressure, thereby enhancing the structural stability of the second manhole cover 21.

[0034] Please refer to Figure 1The pressing assembly 211 further includes pressure pads, at least two of which are fixed to the side of the pressure rod 2111 facing the sealing cover. When the pressure rod 2111 is pressed down, the pressure pads will first contact the sealing cover and deform, acting as a buffer while increasing the pressure per unit area, thus achieving a better sealing effect.

[0035] Please refer to Figure 1 and Figure 2 The first manhole cover 11 is designed as a grid 111 structure. The design of the grid 111 structure ensures load-bearing capacity, facilitates the passage of rainwater and debris, reduces the possibility of water accumulation in the base, and avoids the drainage problems that may result from complete sealing.

[0036] The sealed cover 212 has a certain angle of inclination, forming a depression in the second step, and the depression is provided with a drain outlet 22. The inclined sealed cover 212 allows rainwater or other liquids falling on it to flow quickly to the depression and then be discharged through the drain outlet 22, avoiding the accumulation of water on the surface of the second manhole cover 21 and preventing water accumulation in the base.

[0037] Please refer to Figure 2 The second manhole cover 21 is also equipped with a handle 213, which makes it easy for staff to open the second manhole cover 21 for inspection or maintenance; in another embodiment, the first manhole cover 11 is fixed with a chain to prevent theft or accidental movement; these designs ensure the safety of the manhole cover and improve the convenience of use.

[0038] Please refer to Figure 6 , Figure 7 and Figure 8 In another embodiment, the latching member 2113 includes a baffle 21131 and a latching position 21132. The baffle 21131 is rotatable, and the latching position 21132 is engaged with the baffle 21131. The rotatable baffle 21131 design allows the user to adjust the position of the baffle 21131 as needed, thereby selecting the most suitable latching position to fix the pressure rod 2111. This ensures that the pressure rod 2111 is securely locked in the closed position under different usage conditions, preventing it from opening due to accidental loosening or vibration.

[0039] The double-layer manhole cover disclosed in this utility model mainly consists of a base, a first manhole cover 112, and a second manhole cover 211. When normally closed, both the first manhole cover 11 and the second manhole cover 21 are closed. The first manhole cover 11 has a grid structure 111, allowing rainwater and small debris to pass through but preventing large objects from entering. The sealing plate 212 of the second manhole cover 21 is tightly pressed against the load-bearing seat 3 by the pressing assembly 211, and the gasket 214 ensures a sealing effect. When opening, the worker lifts the pressure rod 2111 of the pressing assembly 211 upwards, causing the pressure rod 2111 to disengage from the buckle 2113. As the pressure rod 2111 rotates and is lifted, the sealing plate 212 gradually separates from the load-bearing seat 3. Lift the handle 213 of the second manhole cover 21 to open the cover. If it is necessary to enter the manhole for inspection or maintenance, the first manhole cover 11 can be opened first, and then the second manhole cover 21 can be opened according to the above steps. When closing and locking, after the staff has completed the inspection or maintenance inside the manhole, the sealing cover plate 212 of the second manhole cover 21 is aligned with the load-bearing seat ring 3 and lowered. The sealing cover plate 212 is pressed tightly against the load-bearing seat ring 3 by the pressure rod 2111 of the pressing assembly 211 and locked in the buckle 2113. Finally, check whether the first manhole cover 11 is locked and ensure that all parts are in normal condition.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A double-layer manhole cover, comprising a base, an inner wall of the base being provided with two levels of steps, a first level of steps of the inner wall of the base being provided with a first manhole cover, and a second level of steps of the inner wall of the base being provided with a second manhole cover, characterized in that the second manhole cover comprises a pressing assembly and a sealing cover plate, a load-bearing seat ring being provided between the second level of steps and the sealing cover plate, the load-bearing seat ring being fixed to the second level of steps, and the pressing assembly being used to press the sealing cover plate towards the load-bearing seat ring. The pressing assembly comprises a pressing rod, a rotating shaft and a buckle, one end of the pressing rod being hinged to the rotating shaft, the other end of the pressing rod being rotatable around the rotating shaft, the rotating shaft being fixed to the second level of steps, and the buckle being buckled to the movable end of the pressing rod. The second manhole cover further comprises a gasket, the gasket being laid on a contact surface between the load-bearing seat ring and the sealing cover plate.

2. A dual level manhole cover as claimed in claim 1, wherein, The buckle comprises a baffle and a buckle position, the baffle being rotatable, and the baffle being buckled to the buckle position.

3. A dual level manhole cover as claimed in claim 1, wherein, The base is further provided with at least two anchor rods, one end of each anchor rod being fixed to the pressing assembly, and the other end of each anchor rod being fixed to the second level of steps.

4. The dual level manhole cover of claim 1, wherein, The pressing assembly further comprises pressing pads, at least two pressing pads being fixed to one side of the pressing rod facing the sealing cover plate.

5. The dual pit cover of claim 1, wherein, The first manhole cover is of a grating structure.

6. The dual level manhole cover of claim 1, wherein, The sealing cover plate has a certain inclination angle, forming a low-lying part on the second level of steps, and the low-lying part is provided with a water outlet.

7. The dual level manhole cover of claim 1, wherein, The first manhole cover is provided with a chain fixing, and the second manhole cover is further provided with a handle.

8. The dual level manhole cover of claim 1, wherein, ​

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