阅读说明：本技术 一种基于弹力与电磁斥力协同消能的磁悬浮缓冲减震井盖及使用方法 (Magnetic suspension buffering and damping well lid based on cooperative energy dissipation of elastic force and electromagnetic repulsion force and use method ) 是由 王少华 乔素云 杨万喜 于 2021-08-17 设计创作，主要内容包括：本发明提供了一种基于弹力与电磁斥力协同消能的磁悬浮缓冲减震井盖及使用方法,它包括U形井盖,所述U形井盖的底端固定有支撑板,所述支撑板与设置在安装基础内部的安装槽相配合,并使其能够在安装槽内部升降；所述安装槽的底端设置有底部垫板,所述支撑板和底部垫板之间间隔设置有电磁缓冲减震机构和弹簧缓冲减震机构。利用磁悬浮原理结合弹簧减震消能解决了普通井盖排水不及时和抗震性能差、井盖周边路面混凝土易沉降剪切破坏等问题；而且其电磁力的大小能够根据所受到的压力进行调节。(The invention provides a magnetic suspension buffering and damping well lid based on synergistic energy dissipation of elastic force and electromagnetic repulsion force and a using method thereof, wherein the well lid comprises a U-shaped well lid, wherein a supporting plate is fixed at the bottom end of the U-shaped well lid, and the supporting plate is matched with an installation groove arranged in an installation base and can be lifted in the installation groove; the bottom of mounting groove is provided with the bottom backing plate, the interval is provided with electromagnetism buffering damper and spring buffering damper between backup pad and the bottom backing plate. The problems that the drainage of the common well lid is untimely, the anti-seismic performance is poor, concrete on the pavement around the well lid is easy to settle, shear and damage and the like are solved by utilizing the magnetic suspension principle and combining the spring shock absorption and energy dissipation; and the electromagnetic force can be adjusted according to the pressure.)

1. The utility model provides a magnetic suspension buffering shock attenuation well lid based on elasticity and electromagnetic repulsion energy disappear in coordination which characterized in that: the anti-theft well cover comprises a U-shaped well cover (1), wherein a supporting plate (17) is fixed at the bottom end of the U-shaped well cover (1), and the supporting plate (17) is matched with a mounting groove (18) arranged in a mounting base and can lift in the mounting groove (18); the bottom of mounting groove (18) is provided with bottom backing plate (19), the interval is provided with electromagnetism buffering damper and spring buffering damper between backup pad (17) and bottom backing plate (19).

2. The magnetic suspension buffering and damping manhole cover based on the cooperative energy dissipation of the elastic force and the electromagnetic repulsion force as claimed in claim 1, is characterized in that: the electromagnetic buffering and damping mechanism comprises an electromagnet (2) fixed at the bottom end of a supporting plate (17), and the electromagnet (2) is fixed in a rubber embedding groove (6) at the bottom end of the supporting plate (17) in an embedding installation mode; electromagnet (2) link to each other through electrically conductive pulley (7) and slip varistor electromagnetic adjuster (16), slip varistor electromagnetic adjuster (16) are vertical to be fixed inside mounting groove (18), the top of bottom backing plate (19) to be located electromagnet (2) under the position fixed mounting have permanent magnet (5).

3. The magnetic suspension buffering and damping manhole cover based on cooperative energy dissipation of elastic force and electromagnetic repulsion force according to claim 2, wherein: the sliding variable resistance electromagnetic regulator (16) is formed by modifying a sliding rheostat, the size of a magnetic field is controlled by changing the size of current, and the whole sliding variable resistance electromagnetic regulator (16) comprises a non-conducting area (16-1) and an effective regulating area (16-2); when the conductive pulley (7) is in the non-conductive area (16-1), the electromagnet is in a power-off state, the magnetic force is zero, and the spring (4) bears external impact load; when the conductive pulley (7) is in the effective adjusting area (16-2), the electromagnet is in a power-on state, the pulley slides downwards, the magnetic force of the electromagnet is enhanced, and at the moment, the electromagnetic repulsion and the elastic force are cooperated to reduce the load.

4. The magnetic suspension buffering and damping manhole cover based on the cooperative energy dissipation of the elastic force and the electromagnetic repulsion force as claimed in claim 1, is characterized in that: the spring buffering and damping mechanism comprises a first spring (4) fixed on a rubber embedding groove (6) at the bottom end of a supporting plate (17), and the bottom end of the first spring (4) is supported on the rubber embedding groove (6) located on a bottom base plate (19).

5. The magnetic suspension buffering and damping manhole cover based on the cooperative energy dissipation of the elastic force and the electromagnetic repulsion force as claimed in claim 1, is characterized in that: the U-shaped well lid (1) is cast and molded by adopting a cast iron material; the top outer circular ring of the U-shaped well lid (1) is a solid plane, and the inner circle is a grid-shaped hollow grid for filtering.

6. The magnetic suspension buffering and damping well lid based on the cooperative energy dissipation of the elastic 1 force and the electromagnetic repulsion force is characterized in that: stiffening ribs (15) are welded and fixed between the top end of the supporting plate (17) and the outer wall of the U-shaped well lid (1);

the electromagnet (2) is installed in the rubber embedding groove, and one end of the S pole is fixed on the lower side edge of the U-shaped well lid (1).

7. The magnetic suspension buffering and damping manhole cover based on the cooperative energy dissipation of the elastic force and the electromagnetic repulsion force as claimed in claim 1, is characterized in that: the bottom center part of U-shaped well lid (1) is fixed with member (3), be fixed with limiting plate (10) on member (3), the top support of limiting plate (10) has second spring (9), the top support of second spring (9) has toper header tank (8), the top of toper header tank (8) cooperatees with the lower terminal surface of U-shaped well lid (1).

8. The magnetic suspension buffering and damping manhole cover based on cooperative energy dissipation of elastic force and electromagnetic repulsion force according to claim 7, wherein: the top end of the rod piece (3) is welded and fixed at the bottom end of the U-shaped well cover (1) through a backing plate (13); a soft magnetic silica gel sealing strip (14) is fixed at the top end of the conical water collecting tank (8), and the soft magnetic silica gel sealing strip (14) is in sealing contact fit with the bottom end of the U-shaped well lid (1); the conical water collecting tank (8) adopts a penetration coefficient of 1 multiplied by 10^-3 A water permeable stone of mm/s.

9. The magnetic suspension buffering and damping manhole cover based on cooperative energy dissipation of elastic force and electromagnetic repulsion force according to claim 7, wherein: the bottom end of the rod piece (3) is fixedly provided with a rotor generating device (12) for generating electricity, and the rotor generating device (12) can generate electric quantity under the impact of sewer water flow and store the electric quantity to provide power for the electromagnet (2) of the electromagnetic buffering damping mechanism.

10. The use method of the magnetic suspension buffering and shock absorbing well lid as claimed in any one of claims 1 to 9, is characterized in that:

when the load of a small vehicle is applied to the inverted U-shaped well cover (1), the conductive pulley (7) is positioned in the non-conductive area (16-1), the electromagnet (2) is in a power-off state, and only the first spring (4) of the spring buffering and damping mechanism is stressed;

when a large vehicle load is applied to the well lid, the elastic force of a spring in the length range of the non-conductive area (16-1) is not enough to resist external impact load, the conductive pulley (7) slides into the area of the effective adjusting area (16-2), the electromagnet (2) generates magnetic force, when the load continues to increase, the pulley slides downwards, the electromagnet magnetic force increases to resist the external impact load, and meanwhile, the external load is dynamically converted into magnetic field energy, so that the acting force of external disturbance on a buffered object is reduced, and the vibration amplitude of the buffered well lid is reduced or even is not generated; the first spring (4) can buffer a part of impact load through self compression deformation, so that the synergistic effect of the magnetic force and the elastic force adapts to the damping operation under different loads, and finally the damage of the impact load to the well cover is eliminated;

in heavy rain weather, accumulated water on the road surface can flow into the conical water collecting tank (8) through the grid-shaped hollow grids of the U-shaped well cover (1), when the amount of rainwater is large, the rainwater flowing into the conical water collecting tank (8) cannot seep out in time, the second compression spring (9) can be compressed under the action of gravity and moves downwards along the rod piece (3), the soft magnetic silica gel sealing strip (14) bonded on the outer edge of the conical water collecting tank (8) is separated from the U-shaped well cover (1), a side flow channel of the U-shaped well cover (1) is opened, and water flow is quickly discharged into a pipeline along the hollow U-shaped well cover (1);

in sunny days, the soft magnetic silica gel sealing strip (14) bonded on the outer side edge of the conical water collecting tank (8) is tightly adsorbed with the outer ring of the U-shaped well cover (1), and the conical water collecting tank (8) and the soft magnetic silica gel sealing strip (14) prevent the outflow of methane in the sewage pipeline to a certain extent.

Technical Field

The invention relates to the technical field of municipal manhole covers, in particular to a magnetic suspension buffering and damping manhole cover based on synergistic energy dissipation of elasticity and electromagnetic repulsion and a using method.

Background

Most of the existing sewer well covers are round or square, and most of the existing sewer well covers are made of cast iron or cement. The well lid exposes in the earth's surface, is in the road surface structural layer, under the impact load effect such as artificial disturbance and vehicle roll, appears breakage, collapses, turns on one's side easily. If the well lid diseases cannot be found and treated in time, inconvenience is brought to underground pipeline management, citizen life and transportation, and life and property safety of the masses can be endangered. In addition, the automobile rolls over the road to cause noise, causes automobile vibration, and damages the quick wear of automobile parts. Road traffic jams can also result when sewer maintenance is performed.

For some sewage pipelines, in order to prevent methane and other unpleasant gases from overflowing, most sewage pipeline well covers only leave two opening holes, so that in summer when rainwater is frequent, on one hand, a drainage system of an urban pipe gallery cannot drain accumulated water on the road surface in time, and road traffic is affected; on the other hand, the overflow water flow causes the well cover to be flushed, and potential safety hazards exist.

Disclosure of Invention

The invention aims to provide a magnetic suspension buffering and damping well lid based on synergistic energy dissipation of elastic force and electromagnetic repulsion force and a using method thereof, and solves the problems of untimely drainage, poor anti-seismic performance, easy settlement, shearing and damage of concrete on the road surface around the well lid and the like of the common well lid by utilizing the magnetic suspension principle and combining with the spring shock absorption and energy dissipation; and the electromagnetic force can be adjusted according to the pressure.

In order to achieve the technical features, the invention is realized as follows: a magnetic suspension buffering and damping well lid based on synergistic energy dissipation of elastic force and electromagnetic repulsion force comprises a U-shaped well lid, wherein a supporting plate is fixed at the bottom end of the U-shaped well lid, and the supporting plate is matched with a mounting groove arranged in a mounting base and can lift in the mounting groove; the bottom of mounting groove is provided with the bottom backing plate, the interval is provided with electromagnetism buffering damper and spring buffering damper between backup pad and the bottom backing plate.

The electromagnetic buffering and damping mechanism comprises an electromagnet fixed at the bottom end of the supporting plate, and the electromagnet is fixed in a rubber embedding groove at the bottom end of the supporting plate in an embedding installation mode; the electromagnet is connected with the sliding variable resistance electromagnetic regulator through the conductive pulley, the sliding variable resistance electromagnetic regulator is vertically fixed inside the mounting groove, and the permanent magnet is fixedly mounted at the position right below the electromagnet at the top end of the bottom base plate.

The sliding variable resistance electromagnetic regulator is formed by modifying a sliding rheostat, the size of a magnetic field is controlled by changing the size of current, and the whole sliding variable resistance electromagnetic regulator comprises a non-conducting area and an effective regulating area; when the conductive pulley is in a non-conductive area, the electromagnet is in a power-off state, the magnetic force is zero, and the spring bears external impact load at the moment; when the conductive pulley is in the effective adjusting area, the electromagnet is in a power-on state, the pulley slides downwards, the magnetic force of the electromagnet is enhanced, and at the moment, the electromagnetic repulsion force and the elastic force are cooperatively relieved.

The spring buffering and damping mechanism comprises a first spring fixed on a rubber embedding groove at the bottom end of the supporting plate, and the bottom end of the first spring is supported on the rubber embedding groove on the bottom base plate.

The U-shaped well cover is cast and molded by adopting a cast iron material; the top outer circular ring of the U-shaped well lid is a solid plane, and the inner circle is a grid-shaped hollow grid for filtering.

Stiffening ribs are welded and fixed between the top end of the supporting plate and the outer wall of the U-shaped well cover;

the electromagnet is installed in the rubber embedding groove, and one end of the S pole is fixed on the lower side edge of the U-shaped well cover.

The bottom center part of U-shaped well lid is fixed with the member, be fixed with the limiting plate on the member, the top of limiting plate is supported there is the second spring, the top of second spring is supported there is the toper header tank, the top of toper header tank cooperatees with the lower terminal surface of U-shaped well lid.

The top end of the rod piece is welded and fixed at the bottom end of the U-shaped well cover through a backing plate; the top end of the conical water collecting tank is fixedly provided with a soft magnetic silica gel sealing strip, and the soft magnetic silica gel sealing strip is in sealing contact fit with the bottom end of the U-shaped well cover; the conical water collecting tank adopts a permeability coefficient of 1 multiplied by 10^-3 A water permeable stone of mm/s.

The bottom end of the rod piece is fixedly provided with a rotor power generation device for power generation, and the rotor power generation device can generate electric quantity under the impact of sewer water flow and store the electric quantity to provide power for the electromagnet of the electromagnetic buffering damping mechanism.

The use method of the magnetic suspension buffering shock-absorbing well cover comprises the following steps:

when the load of the small vehicle is applied to the inverted U-shaped well cover, the conductive pulley is positioned in the non-conductive area, the electromagnet is in a power-off state, and only the first spring of the spring buffering and damping mechanism is stressed;

when a large vehicle load is applied to the well lid, the elastic force of the spring in the length range of the non-conducting area is not enough to resist an external impact load, the conducting pulley slides into the area of the effective adjusting area, the electromagnet generates magnetic force, when the load continues to increase, the pulley slides downwards, the magnetic force of the electromagnet increases to resist the external impact load, and meanwhile, the external load is dynamically converted into magnetic field energy, so that the acting force of external disturbance on a buffered object is reduced, and the vibration amplitude of the buffered well lid is small or even no vibration is generated; the first spring can buffer a part of impact load through self compression deformation, so that the synergistic effect of the magnetic force and the elastic force adapts to the damping operation under different loads, and finally the damage of the impact load to the well lid is eliminated;

in heavy rain weather, accumulated water on the road surface can flow into the conical water collecting tank through the grid-shaped hollow grids of the U-shaped well cover, when the amount of the rainwater is large, the rainwater flowing into the conical water collecting tank cannot seep out in time, the second compression spring can be pressed under the action of gravity and moves downwards along the rod piece, the soft magnetic silica gel sealing strip bonded on the outer side edge of the conical water collecting tank is separated from the U-shaped well cover, the opening of a U-shaped well cover side flow channel is realized, and water flow is quickly discharged into a pipeline along the hollow U-shaped well cover;

in sunny days, the soft magnetic silica gel sealing strips bonded on the outer side edges of the conical water collecting tank are closely adsorbed with the outer ring of the U-shaped well cover, and the conical water collecting tank and the soft magnetic silica gel sealing strips prevent the outflow of methane in the sewage pipeline to a certain extent.

The invention has the following beneficial effects:

1. the well lid and the well seat adopt an integrated U-shaped design method, instantaneous impact force generated by vehicle tires when the well lid is rolled can convert impact kinetic energy into elastic potential energy and magnetic field energy through repulsion between the spring, the electromagnet and the high-strength permanent magnet to realize dynamic balance, energy dissipation is realized under the condition of small displacement, and the phenomenon of shearing damage finally caused by concrete settlement around the well lid for a long time can be effectively prevented.

2. Drainage mode compares with traditional well lid, and top grid form fretwork net can promote the rainwater inflow by a wide margin, can realize opening of well lid side flow passageway under the dead weight effort behind the header tank catchment water, and drainage performance is excellent, can effectively solve when rainstorm waterlogging weather because of the poor a large amount of ponding scheduling problems in road surface that lead to of well lid drainage ability.

3. The common spring has limited telescopic displacement and fixed rigidity, and is difficult to effectively adjust the elasticity, so the damping force is fixed, and the common spring is difficult to play a proper damping role under different loads; the invention uses the elastic force of the spring and the electromagnetic repulsion as the resistance. The elastic force of the spring is linear force, the electromagnetic repulsion force is nonlinear force, and the spring and the electromagnetic repulsion force are nonlinear coupling, so that the vibration reduction quality can be better improved.

4. Through rotor power generation facility, can convert the impact kinetic energy of rivers into the electric energy and store and get up and provide electric power for the electro-magnet, realize need not external power source, energy-concerving and environment-protective.

5. The sliding variable resistance electromagnetic actuator can be used.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a sectional view of a rubber caulking groove.

Fig. 2 is a schematic cross-sectional view of a magnetic suspension buffering shock-absorbing well lid a-a based on the cooperative energy dissipation of elastic force and electromagnetic repulsion force.

FIG. 3 is a schematic cross-sectional view of a B-B of the magnetic suspension buffering shock absorption well lid based on the cooperative energy dissipation of elastic force and electromagnetic repulsion force.

Fig. 4 is a sliding varistor electromagnetic actuator.

Fig. 5 is a top view of the U-shaped well lid.

In the figure: the device comprises a U-shaped well cover 1, an electromagnet 2, a rod piece 3, a first spring 4, a permanent magnet 5, a rubber embedding groove 6, a conductive pulley 7, a conical water collecting tank 8, a second spring 9, a limiting plate 10, a rotor power generation device 12, a backing plate 13, a soft magnetic silica gel sealing strip 14, a stiffening rib 15, a sliding variable resistance electromagnetic regulator 16, a supporting plate 17, a mounting groove 18 and a bottom backing plate 19;

a non-conductive region 16-1, an active conditioning region 16-2, and a conductive line 16-3.

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.

Example 1:

referring to fig. 1-5, a magnetic suspension buffering shock attenuation well lid based on elasticity and electromagnetic repulsion energy disappear in coordination, its characterized in that: the well cover comprises a U-shaped well cover 1, wherein a supporting plate 17 is fixed at the bottom end of the U-shaped well cover 1, and the supporting plate 17 is matched with a mounting groove 18 arranged in a mounting base and can be lifted in the mounting groove 18; the bottom of mounting groove 18 is provided with bottom backing plate 19, the interval is provided with electromagnetism buffering damper and spring buffering damper between backup pad 17 and the bottom backing plate 19. By adopting the shock absorption well lid, the problems that the common well lid is untimely in drainage, poor in anti-seismic performance, easy to settle, shear and damage concrete on the road surface around the well lid and the like are solved by combining the magnetic suspension principle with the spring shock absorption and energy dissipation. And the noise generated when the vehicle passes through the well lid is effectively reduced.

Furthermore, the electromagnetic buffering and damping mechanism comprises an electromagnet 2 fixed at the bottom end of the supporting plate 17, and the electromagnet 2 is fixed in a rubber embedding groove 6 at the bottom end of the supporting plate 17 in an embedding installation mode; the electromagnet 2 is connected with a sliding variable resistance electromagnetic regulator 16 through a conductive pulley 7, the sliding variable resistance electromagnetic regulator 16 is vertically fixed inside the installation groove 18, and a permanent magnet 5 is fixedly installed at the position right below the electromagnet 2 at the top end of the bottom backing plate 19. The electromagnetic buffering and damping mechanism can generate buffering and damping through generating electromagnetic force. In the course of the work, cooperate with permanent magnet 5 through electro-magnet 2, and then realize the electromagnetic force for carry out the magnetic force to U-shaped well lid 1 and support.

Further, the sliding varistor electromagnetic regulator 16 is formed by modifying a sliding varistor, the size of the magnetic field is controlled by changing the size of the current, and the whole sliding varistor electromagnetic regulator 16 comprises a non-conducting area 16-1 and an effective regulating area 16-2; when the conductive pulley 7 is in the non-conductive area 16-1, the electromagnet is in a power-off state, the magnetic force is zero, and the spring 4 bears external impact load at the moment; when the conductive pulley 7 is in the effective adjusting area 16-2, the electromagnet is in a powered state, the pulley slides downwards, the magnetic force of the electromagnet is enhanced, and at the moment, the electromagnetic repulsion and the elastic force are cooperated to reduce the load. The sliding variable resistance electromagnetic adjuster 16 can be used for adjusting the size of the electromagnet 2 so as to adapt to different bearing capacities.

Further, the spring buffering and damping mechanism comprises a first spring 4 fixed on a rubber embedding groove 6 at the bottom end of the supporting plate 17, and the bottom end of the first spring 4 is supported on the rubber embedding groove 6 on the bottom backing plate 19. The spring buffering and damping mechanism can buffer through elasticity.

Further, the U-shaped well lid 1 is cast and molded by adopting a cast iron material; the top outer circular ring of the U-shaped well lid 1 is a solid plane, and the inner circle is a grid-shaped hollow grid for filtering. Through adopting the well lid of above-mentioned structure, when having guaranteed its effective drainage, strengthened its structural strength.

Furthermore, a stiffening rib 15 is welded and fixed between the top end of the supporting plate and the outer wall of the U-shaped well lid 1. The connection strength of the support plates is ensured by the above-described stiffening ribs 15.

Furthermore, the electromagnet 2 is fixed inside a rubber embedding groove 6 at the bottom end of the supporting plate in an embedding installation mode. Through foretell fixed mounting mode, guaranteed the reliability of fixing electromagnet 2, the problem that mode it takes place to drop.

Further, the bottom center part of U-shaped well lid 1 is fixed with member 3, be fixed with limiting plate 10 on the member 3, the top of limiting plate 10 is supported there is second spring 9, the top of second spring 9 is supported there is toper header tank 8, the top of toper header tank 8 cooperatees with the lower terminal surface of U-shaped well lid 1. Through the structure, the conical water collecting tank 8 can collect water, and then electricity is generated through water flow. In addition, the conical water collecting tank 8 can be always tightly pushed by the second spring 9, so that the top of the conical water collecting tank is tightly attached to the U-shaped well lid 1, and a water collecting effect is achieved.

Further, the top end of the rod piece 3 is welded and fixed at the bottom end of the U-shaped well cover 1 through a backing plate 13; a soft magnetic silica gel sealing strip 14 is fixed at the top end of the conical water collecting tank 8, and the soft magnetic silica gel sealing strip 14 is in sealing contact fit with the bottom end of the U-shaped well lid 1; the conical water collecting tank 8 adopts a penetration coefficient of 1 multiplied by 10^-3 A water permeable stone of mm/s. The sealing effect can be achieved by the soft magnetic silicone rubber sealing strip 14.

Further, a rotor power generation device 12 for generating power is fixedly mounted at the bottom end of the rod 3, and the rotor power generation device 12 can generate electric quantity under the impact of sewer water flow to store the electric quantity to provide power for the electromagnet 2. The purpose of generating electricity is achieved by the rotor generator 12.

Example 2:

the use method of the magnetic suspension buffering shock-absorbing well cover comprises the following steps:

when the load of a small vehicle is applied to the inverted U-shaped well lid 1, the conductive pulley 7 is positioned in the non-conductive area 16-1, the electromagnet 2 is in a power-off state, and only the first spring 4 of the spring buffering and damping mechanism is stressed;

when a large vehicle load is applied to the well lid, the elastic force of the spring in the length range of the non-conductive area 16-1 is not enough to resist external impact load, the conductive pulley 7 slides into the area of the effective adjusting area 16-2, the electromagnet 2 generates magnetic force, when the load continues to increase, the pulley slides downwards, the electromagnet magnetic force increases to resist the external impact load, and meanwhile, the external load is dynamically converted into magnetic field energy, so that the acting force of external disturbance on a buffered object is reduced, and the vibration amplitude of the buffered well lid is reduced or even no vibration is generated; the first spring 4 can buffer a part of impact load through self compression deformation, so that the synergistic effect of the magnetic force and the elastic force adapts to the damping operation under different loads, and finally the damage of the impact load to the well lid is eliminated;

in heavy rain, accumulated water on the road surface can flow into the tapered water collecting tank 8 through the grid-shaped hollow grids of the U-shaped well cover 1, when the amount of rainwater is large, the rainwater flowing into the tapered water collecting tank 8 cannot seep out in time, the second compression spring 9 can be pressed under the action of gravity and moves downwards along the rod piece 3, the soft magnetic silica gel sealing strip 14 bonded on the outer edge of the tapered water collecting tank 8 is separated from the U-shaped well cover 1, the opening of a side flow channel of the U-shaped well cover 1 is realized, and the water flow is quickly discharged into a pipeline along the hollow U-shaped well cover 1;

in sunny days, the soft magnetic silica gel sealing strips 14 bonded on the outer side edges of the conical water collecting tank 8 are closely adsorbed with the outer ring of the U-shaped well cover 1, and the conical water collecting tank 8 and the soft magnetic silica gel sealing strips 14 prevent the outflow of methane in the sewage pipeline to a certain extent.