Seamless invisible well lid convenient to overhaul

Abstract

The invention belongs to the technical field of municipal water supply and drainage engineering, and particularly relates to a seamless invisible well lid convenient to overhaul, which comprises a well seat, an outer support frame and two split covering modules. The well seat is arranged on the well shaft or the well ring, a round through hole is formed in the well seat, and an anti-falling net is installed at the round through hole. The outer supporting frame is of a square integral type, is buried in a road and is located above the well base, the sections of the inner supporting frame and the outer supporting frame are both in an L shape, and the inner supporting frame and the outer supporting frame can be stacked and matched. The number of the split modules is two, each split module comprises a base plate, a pavement layer on the upper portion of the base plate, an inner supporting frame connected with the lower portion of the base plate and a sucking and lifting block, the base plates comprise the first base plate and the second base plate, and the first base plate and the second base plate are in central symmetry and are triangular or trapezoidal. The split covering module can be lifted and put back through cooperation of a magnetic attraction tool and the attraction and lifting block. The weight of the well lid opened at a time is reduced, the consistency of well lid surface paving and surrounding roads can be improved through the magnetic suction and lifting blocks, and meanwhile overhauling is convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of municipal water supply and drainage engineering, and particularly relates to a seamless invisible manhole cover convenient for maintenance. Background Art

[0002] Manhole covers are used to cover deep wells on municipal roads to prevent people or objects from falling, and are an indispensable part of urban infrastructure. With the improvement of the flatness requirements of urban roads, seamless invisible manhole covers have emerged, which have the characteristics of high integration with the surrounding environment, strong aesthetics, and high safety.

[0003] Seamless invisible manhole covers usually consist of a well ring, a manhole cover body, and a paving layer. The well ring is mostly a rectangular cylindrical structure made of precast reinforced concrete, and the manhole cover body uses high-strength stainless steel plates as the base material, reinforced with bottom angle steel, and made through cutting, folding, and welding processes. Since seamless invisible manhole covers achieve completely seamless connection, the ground looks more flat and beautiful. Some manhole cover surfaces can be paved with the same decorative materials as the surrounding ground, such as stones, floor tiles, or lawns, etc., making them blend in with the surrounding environment and making it difficult to detect the existence of the manhole cover from the appearance.

[0004] A seamless invisible manhole cover disclosed in the Chinese utility model patent with the publication number CN209066503U is welded by stainless steel bearing plates at four corners to form 4 through lifting holes and install lifting hooks at the bottom stainless steel bearing plates for convenient lifting of the manhole cover during maintenance. However, in order to ensure flatness and seamless effect, the upper surfaces of the four lifting hooks are flat, and after long-term use, the lifting hooks are prone to sticking to the manhole cover body, and there is no force point for lifting.

[0005] Similarly, in order to be beautiful, the existing seamless invisible manhole covers will hide the locking structure, which is affected by rust, dust, rain, etc. outdoors, resulting in difficult opening. Summary of the Invention

[0006] Aiming at the above deficiencies of the existing technology, the problem to be solved by the present invention is that the existing seamless invisible manhole covers are prone to difficult opening after long-term use due to structural problems, and it is not convenient to repair the underground pipelines. The present invention provides a seamless invisible manhole cover convenient for maintenance, which is provided with a two-piece inner support frame that can rotate relative to the outer support frame. The substrate on the inner support frame is trapezoidal or triangular, and paving and magnetic suction lifting blocks are arranged on the substrate. The two-piece structure can be opened relatively, reducing the weight of the manhole cover opened at one time. The magnetic suction lifting blocks can improve the consistency between the paving on the manhole cover surface and the surrounding roads, and at the same time facilitate maintenance.

[0007] In order to achieve the above object, the present invention provides a seamless invisible manhole cover convenient for maintenance, including a well seat, an outer support frame, and two split covering modules.

[0008] The manhole base is arranged on the wellbore or manhole ring. A circular through-hole is arranged inside the manhole base, and a falling prevention net is installed at the circular through-hole.

[0009] The outer support frame is of an integral square shape, buried in the road and located above the manhole base. The cross-sections of the inner support frame and the outer support frame are both L-shaped and can be stacked and matched.

[0010] There are two split modules, including a base plate, a paving layer on the upper part of the base plate, an inner support frame connected to the lower part of the base plate, and a lifting block. The base plate includes a first base plate and a second base plate, which are centrosymmetric and are triangular or trapezoidal.

[0011] There are two inner support frames, corresponding to the shapes of the first base plate and the second base plate and cooperating with each other. The first base plate and the second base plate are respectively fixedly connected to the two inner support frames. One side of the inner support frames that does not contact each other is hinged to the outer frame, and the two hinged sides are symmetric to ensure the smooth opening and closing of the first base plate, the second base plate and the inner support frames.

[0012] There are two paving layers, which are the same as the surrounding road materials and thickness where the manhole cover is installed, and are the same as the shapes and sizes of the first base plate and the second base plate. Thus arranged, the paving layer can be asphalt, concrete, permeable bricks, etc.

[0013] The lifting block is fixedly connected to the base plate or the inner support frame and is at the same height as the paving layer. The lifting block is made of iron material, and the split covering module can be lifted and replaced by a magnetic adsorption tool. Thus arranged, the acting force can be applied to the base plate or the inner support frame through the lifting block instead of the paving layer, avoiding damage to the paving layer during long-term use.

[0014] For the seamless invisible manhole cover according to another embodiment of the present invention or any of the foregoing embodiments, a circular step is arranged on the inner ring of the manhole base, and a circular stainless steel mesh is placed on the step. The thickness of the stainless steel mesh is not less than 6 mm, and the holes are not less than 1 cm. 2 Thus arranged, after the two base plates are opened, it can prevent pedestrians or tools from falling. Without lifting the stainless steel mesh, the lower situation can be observed through the holes. After lifting the stainless steel mesh, the maintenance of the underground pipe network can be carried out.

[0015] For the seamless invisible manhole cover according to another embodiment of the present invention or any of the foregoing embodiments, a plurality of hooks are arranged on the inner ring of the manhole base, and a woven rope net is suspended on the hooks. Thus arranged, the cost is relatively low and a falling prevention effect is provided.

[0016] For the seamless invisible manhole cover according to another embodiment of the present invention or any of the foregoing embodiments, after the manhole base is installed, normal road construction is carried out on the outside, and a square hole is left above the manhole base, and the outer support frame is buried in the square hole. Thus arranged, the manhole base and the road (such as concrete, asphalt or non-sand macroporous concrete base, etc.) become an integral body, and the support for the base plate is more stable.

[0017] According to the seamless invisible manhole cover of another embodiment of the present invention or any of the foregoing embodiments, a shock pad is placed between the inner support frame and the outer support frame. The shock pad is preferably made of rubber and has a thickness of not less than 5 mm. With such a setting, the instantaneous impact on the paving layer can be buffered, the direct impact transmission between the paving layer, the substrate, and the inner frame can be reduced, and the "clang" abnormal sound of traditional manhole covers can be avoided, which is especially suitable for noise-sensitive areas such as residential areas and hospitals.

[0018] According to the seamless invisible manhole cover of another embodiment of the present invention or any of the foregoing embodiments, the two inner support frames and the outer support frame are made of stainless steel angle steel, and the hinged joints are connected by at least two hinge hinges. With such a setting, the deflection of a single hinge point during rotation can be avoided, and more than two hinge points make the force evenly distributed during rotation, with a long service life. Using hinge hinges has a lower cost and is convenient for installation and disassembly.

[0019] According to the seamless invisible manhole cover of another embodiment of the present invention or any of the foregoing embodiments, the first substrate and the second substrate are fixedly connected to the inner support frame by welding. With such a setting, the cost is relatively low and the connection is relatively stable. When welding operations are not convenient, mechanical connections such as bolts, screw holes, or snap connections can be used.

[0020] According to the seamless invisible manhole cover of another embodiment of the present invention or any of the foregoing embodiments, an aircraft hole or a pit is provided on the lifting block. With such a setting, in general, after using a handheld electromagnet or a permanent magnet crowbar to adsorb the magnetic lifting block, the substrate is rotated and pulled to both sides. When there is no handheld electromagnet or permanent magnet crowbar, other tools can be inserted into the aircraft hole or the pit to pull the two split modules apart and place them back in an orderly manner.

[0021] According to the seamless invisible manhole cover of another embodiment of the present invention or any of the foregoing embodiments, the paving layer is fixedly connected to the first substrate or the second substrate by cement mortar. With such a setting, the integrity of the paving layer and the substrate is better.

[0022] According to the seamless invisible manhole cover of another embodiment of the present invention or any of the foregoing embodiments, the lifting block is provided with a coating, and the coating is the same color as the paving layer. With such a setting, the consistency between the split covering module and the surrounding paving layer and road is improved.

[0023] Advantages of the present invention:

[0024] 1. The seamless invisible manhole cover for convenient maintenance according to the present invention creatively changes the square manhole cover into two trapezoidal substrates. The outer edges of the substrates are placed on the mouth-shaped inner frame. There are also two inner support frames corresponding to the substrates. The inner support frames can rotate relative to the outer support frame. The substrates are provided with the same paving as the surrounding roads (such as asphalt, masonry, concrete, etc.). An iron lifting block is provided on the upper part of the trapezoidal substrate, and the two substrates can be opened relative to each other by a tool with a magnet, so as to facilitate the maintenance of the underground pipeline; the trapezoidal split design disperses the load to the four sides of the inner frame, and the compressive strength is increased by 20% compared with the traditional square manhole cover. When the substrates are closed, compared with two rectangular plates, it avoids the vehicle or pedestrian load being concentrated on a single substrate and can be dispersed to the two substrates, reducing the risk of depression at the connection of the two substrates. At the same time, the trapezoidal structure can avoid lateral displacement.

[0025] 2. The seamless invisible manhole cover for convenient maintenance according to the present invention can open one-sided or both-sided substrates according to the needs of observation, detection or maintenance, avoiding setting it as a whole manhole cover. After carrying the paving (such as 6 cm thick permeable bricks), the overall weight is relatively large and it is difficult for a single person to open.

[0026] 3. The seamless invisible manhole cover for convenient maintenance according to the present invention is provided with a manhole seat on the upper part of the wellbore. In addition to cooperating with the inner support frame to support the substrate and its upper paving layer, a stainless steel mesh can be placed on the annular step of the manhole seat, or an anti-falling net made of tied rope knots can be used. The anti-falling net is 10-15 cm away from the bottom of the manhole cover. When the manhole cover is accidentally opened, the anti-falling net can prevent pedestrians or vehicles from falling into the well, and at the same time prevent objects such as tools and gravel from falling into the well and damaging the pipelines, reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a side sectional view schematic diagram of the seamless invisible manhole cover for convenient maintenance according to the present invention;

[0028] Figure 2 is Figure 1 an enlarged schematic diagram of part A of

[0029] Figure 3 is a top view partial sectional view schematic diagram of the seamless invisible manhole cover for convenient maintenance according to the present invention;

[0030] In the figure: 1, road; 2, paving layer; 3, lifting block; 4, substrate; 401, first substrate; 402, second substrate; 5, anti-falling net; 6, manhole seat; 7, shock pad; 8, hinge; 9, wellbore; 10, inner support frame; 11, outer support frame. DETAILED DESCRIPTION OF THE INVENTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figure 1 、 3 shown, a seamless invisible manhole cover convenient for maintenance includes a manhole seat 6, an outer support frame 11, and two split covering modules.

[0033] As Figure 1 shown, the manhole seat 6 is arranged on the wellbore 9 or the manhole ring. A circular through hole is arranged in the manhole seat 6, and a fall prevention net 5 is installed at the circular through hole. An annular step is arranged on the inner ring of the manhole seat 6, and a circular stainless steel mesh is placed on the step. The thickness of the stainless steel mesh is not less than 6 mm, and the hole is not less than 1 cm2. With such a setting, after the two substrates 4 are opened, it can prevent pedestrians or tools from falling. Without lifting the stainless steel mesh, the lower situation can be observed through the holes. After lifting the stainless steel mesh, the underground pipe network can be maintained. Or, a plurality of hooks are arranged on the inner ring of the manhole seat 6, and the woven rope net is suspended on the hooks. With such a setting, the cost is relatively low and the anti-falling effect is provided. After the manhole seat 6 is installed, the normal construction of the road 1 is carried out on the outside, and a square hole is left on the upper part of the manhole seat 6, and the outer support frame 11 is buried in the square hole. With such a setting, the manhole seat 6 and the road 1 (such as concrete, asphalt or non-sand macroporous concrete base, etc.) become an integral body, and the support for the substrate 4 is more stable.

[0034] As Figure 2 、 3 shown, the outer support frame 11 is an integral "mouth" shape, buried in the road 1 and located above the manhole seat 6. The cross-sections of the inner support frame 10 and the outer support frame 11 are both L-shaped and can be stacked and matched. A shock pad 7 is placed between the inner support frame 10 and the outer support frame 11. The shock pad 7 is preferably made of rubber and has a thickness of not less than 5 mm. With such a setting, the instantaneous impact received by the paving layer 2 can be buffered, the direct impact transmission between the paving layer 2, the substrate 4, and the inner frame can be reduced, and the "clang" abnormal sound of the traditional manhole cover can be avoided, which is especially suitable for noise-sensitive areas such as residential areas and hospitals.

[0035] As Figure 1 、 2 、shown in 3, there are two split modules, including a substrate 4, a paving layer 2 on the upper part of the substrate 4, an inner support frame 10 connected to the lower part of the substrate 4, and a lifting block 3. The substrate 4 includes a first substrate 401 and a second substrate 402. The first substrate 401 and the second substrate 402 are centrosymmetric and are triangular or trapezoidal;

[0036] As Figure 3As shown in the figure, there are two inner support frames 10, which correspond to the shapes of the first substrate 401 and the second substrate 402 and cooperate with each other. The first substrate 401 and the second substrate 402 are fixedly connected to the two inner support frames 10 respectively. One side of the inner support frames 10 that does not contact each other is hinged to the outer frame, and the two hinged sides are symmetrical to ensure the smooth opening and closing of the first substrate 401, the second substrate 402 and the inner support frames 10. The two inner support frames 10 and the outer support frame 11 are made of stainless steel angle steel, and the hinged part is connected by at least two hinge joints 8. This setting avoids the deflection of a single hinge point during rotation. More than two hinge points make the force evenly distributed during rotation, with a long service life. Using the hinge joint 8 has a lower cost and is convenient for installation and disassembly. The first substrate 401 and the second substrate 402 are fixedly connected to the inner support frames 10 by welding respectively. This setting has a lower cost and a relatively firm connection. When welding operations are not convenient, mechanical connections such as bolts, screw holes or snap connections can be used.

[0037] As Figure 2 , 3 shown in the figure, there are two paving layers 2, which have the same material and thickness as the surrounding road 1 where the well cover is installed, and have the same shape and size as the first substrate 401 and the second substrate 402. This setting allows the paving layer 2 to be made of asphalt, concrete, permeable bricks, etc. The paving layer 2 is fixedly connected to the first substrate 401 or the second substrate 402 by cement mortar. This setting makes the integrity of the paving layer 2 and the substrate 4 better.

[0038] As Figure 3 shown in the figure, the lifting block 3 is fixedly connected to the substrate 4 or the inner support frame 10, and is at the same height as the paving layer 2. The lifting block 3 is made of iron material, and the split covering module can be lifted and replaced by a magnetic adsorption tool. This setting allows the acting force to be applied to the substrate 4 or the inner support frame 10 through the lifting block 3 instead of the paving layer 2, avoiding damage to the paving layer 2 during long-term use. The lifting block 3 can also be provided with aircraft holes or pits. This setting allows, in general, when using a handheld electromagnet or a permanent magnet crowbar, after adsorbing the magnetic lifting block 3, the substrate 4 is rotated and pulled to both sides. When there is no handheld electromagnet or permanent magnet crowbar, other tools can be inserted into the aircraft holes or pits to pull the two split modules apart and put them back in an orderly manner. The lifting block 3 can be provided with a coating, and the coating has the same color as the paving layer 2. This setting improves the consistency of the split covering module with the surrounding paving layer 2 and the road 1.

[0039] The working principle of the present invention:

[0040] The present invention is based on multiple innovative designs, including a split trapezoidal substrate 4, a rotating inner support frame 10, a substrate 4, a magnetic adsorption opening, and an integrated anti-fall net 5. Specifically, the manhole cover is composed of two trapezoidal or triangular substrates 4. The outer edge of the substrate 4 is lapped on the pre-buried "mouth"-shaped inner frame, and the relative opening and closing of the substrate 4 are realized through the linkage of the rotatable inner support frame 10 and the outer support frame 11. The surface layer of the substrate 4 is covered with a paving layer 2 (such as asphalt, masonry, or concrete) that is consistent with the material of the surrounding road 1, and iron lifting blocks 3 are embedded inside. After being adsorbed by a tool with a magnet, it can be translated and opened, which not only maintains a visually seamless integration of the road surface but also reduces the weight of a single substrate 4, making it possible for a single person to operate and open it. The trapezoidal structure design disperses the vehicle or pedestrian load to the four sides of the inner frame, increasing the compressive strength by 20% compared to traditional square manhole covers, and avoiding lateral displacement through the geometric self-locking principle. When closed, the two substrates 4 work together to reduce the risk of depression at the connection. In addition, an anti-fall net 5 (made of stainless steel or high-strength rope knots) is provided at the annular step of the well seat 6 below the manhole cover, 10-15 cm away from the bottom of the substrate 4. When the manhole cover is accidentally opened, it can withstand an impact load of ≥1000 kg, preventing personnel from falling or falling objects from damaging pipelines. Through the integration of split modularization, magnetic adsorption opening mechanism, and safety protection, this design realizes the comprehensive optimization of concealment, high load-bearing capacity, rapid maintenance, and safety.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments are only for explaining the technical concept and features of the present invention, and their purpose is to enable those familiar with this technology to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A seamless invisible manhole cover that is easy to maintain, characterized by: It comprises a well base (6), an outer support frame (11), and two split covering modules. The well seat (6) is arranged on the wellbore (9) or the well ring, a circular through hole is arranged in the well seat (6), and an anti-falling net (5) is installed at the circular through hole. The outer support frame (11) is an integral U-shaped frame, buried in the road (1) and located above the well seat (6); the inner support frame (10) and the outer support frame (11) are both L-shaped in cross section and can be stacked and matched. There are two split modules, including a base plate (4), a paving layer (2) on the upper part of the base plate (4), an inner support frame (10) connected to the lower part of the base plate (4), and a suction block (3); the base plate (4) includes a first base plate (401) and a second base plate (402); the first base plate (401) and the second base plate (402) are centrally symmetrical and are in the shape of a triangle or a trapezoid; There are two inner support frames (10), which correspond in shape to the first substrate (401) and the second substrate (402) and cooperate with each other. The first substrate (401) and the second substrate (402) are respectively fixedly connected to the two inner support frames (10). The non-contacting side of the inner support frame (10) is hinged on the outer frame, and the two hinged sides are symmetrical to ensure that the first substrate (401), the second substrate (402) and the inner support frame (10) are smoothly opened and closed. The pavement layer (2) has two pieces, which are made of the same material and thickness as the surrounding road (1) on which the manhole cover is installed, and have the same shape and size as the first substrate (401) and the second substrate (402); The suction block (3) is fixedly connected to the base plate (4) or the inner support frame (10) and has the same height as the paving layer (2). The suction block (3) is made of iron material and can lift and put back the split covering module through a magnetic adsorption tool.

2. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: The inner ring of the well seat (6) is provided with an annular step, on which a circular stainless steel mesh is placed, the thickness of the stainless steel mesh is not less than 6 mm, and the holes are not less than 1 cm 2 .

3. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: The inner circle of the well seat (6) is provided with a plurality of hooks, and the braided rope net is suspended on the hooks. Such a setting has a low cost and provides an anti-falling effect.

4. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: After the well seat (6) is installed, the road (1) is normally constructed on the outside, and a square hole is left on the upper part of the well seat (6), and an external support frame (11) is buried in the square hole.

5. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: A shock-absorbing pad (7) is placed between the inner support frame (10) and the outer support frame (11).

6. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: The two inner support frames (10) and the outer support frame (11) are made of stainless steel angle steels, and the hinged joints are connected by at least two hinged joints (8).

7. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: The first substrate (401) and the second substrate (402) are respectively fixedly connected to the inner support frame (10) by welding.

8. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: The suction block (3) is provided with aircraft holes or pits.

9. The seamless invisible manhole cover for easy maintenance according to claim 1 is characterized in that: The paving layer (2) is fixedly connected to the first substrate (401) or the second substrate (402) via cement mortar.

10. The seamless invisible manhole cover for easy maintenance according to claim 1, characterized in that: The suction block (3) is provided with a coating, and the coating has the same color as the paving layer (2).

Images