Self-locking mute easy-to-open anti-settling manhole cover

Abstract

The invention relates to the field of pipeline engineering, in particular to a self-locking mute easy-to-open anti-settling manhole cover which is composed of a well seat, a well seat rubber mat bearing platform, a pawl mounting wall, a manhole cover body and a city business card. The well seat lifting conical cylinder is aligned with the inspection well and put down, the well seat surface ring is adjusted to be flat with the road surface, the well seat lifting conical cylinder is fixedly connected with the roadbed body through the conical cylinder fixing screws, and the nodular cast iron anti-falling net is placed on the nodular cast iron anti-falling net bearing platform; the nylon anti-falling net is hung on the W-shaped anti-falling net hook, and the silencing pressure-resistant rubber mat is glued on the well seat rubber mat bearing platform; the shaft pin assembles the torsion spring and the pawls between the two pawl mounting walls, the T-shaped screw rod for jacking the well lid is pushed downwards to open the pawls, meanwhile, the self-locking pawls are retracted upwards, the pawl mounting walls are aligned with the pawl box to be put down, the torsion spring locks the self-locking pawls and the inner wall of the vertical ring without loosening, the T-shaped screw rod for jacking the well lid and the well seat can easily jack the well lid and the well seat, and pavement base materials are evenly paved below the well seat surface ring. The well seat and the road surface are adjusted to be flat, and the functions of well lid and well seat settlement adjustment, self-locking, silence, easy opening, theft prevention, settlement prevention, return surge prevention, safety, sealing and leveling are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole covers for pipeline construction projects. Self-locking, silent, easy-to-open and anti-settling manhole covers are used for manhole covers of various specifications and shapes in municipal pipeline construction projects such as rainwater, sewage, electricity, gas, national defense, communications, and tap water. Background Art

[0002] Inspection wells are commonly used facilities in urban municipal pipeline construction projects to facilitate engineering personnel to enter and exit the wells. They not only protect the safety of road traffic and pedestrians, but also take into account the beautification of the city's image; they must be noise-free and non-disturbing, easy to open and more convenient, anti-settling and easy to adjust, and guard the city more safely; there are many complaints about noise nuisance, and currently waste bicycle tires or other rubbers are used as gaskets to eliminate noise, but in a few days these waste bicycle tires or rubber sheets are crushed into pieces by wheels and scattered on the road surface, affecting the city's appearance. The current manhole covers and manhole seats are only connectors, and cannot be fixedly connected and integrated. Loosening is inevitable, and noise nuisance is also inevitable; the current anti-theft technologies on the market include iron chains, hinge connections, There are various methods of anti-theft inspection manhole covers, such as reverse rotation of the stopper, bolt plugging, lock and key, but their anti-theft performance is still very low; in heavy rain, the inspection manholes often backflow, which can easily cause the inspection manhole covers to break away from the constraints of the manhole seat and move to other places, turning the manhole into a trap and causing safety accidents; although some have been equipped with anti-fall nets, there are still traffic safety hazards for bicycles, motorcycles, cars, etc.; some inspection manhole covers focus on anti-theft but seriously ignore the following aspects: easy opening, noise prevention, anti-sedimentation, anti-backflow, anti-rust and anti-(sand, stone) jamming. It takes a lot of time and energy to open a manhole cover on a busy traffic artery, which increases traffic safety hazards and affects the efficiency of maintenance work in and out of the inspection well. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and achieve the following ten functions.

[0004] The well seat settlement adjustment function, when the well seat sinks due to reasons such as roadbed settlement and needs to be adjusted, after the well seat sealing plug and the cone cylinder fixing screw are unscrewed out, the jacking well seat T screw is aligned with the jacking well seat screw hole and screwed in, the jacking well seat T screw continues to move forward and collides with the screw top plate, and the threaded screw is used to forcefully lift the well seat as a whole. The conical design of the well seat lifting cone cylinder with a small bottom and a large top prevents settlement under the extrusion pressure of the roadbed and is also conducive to adjusting the jacking. Then, the road surface material is evenly spread and vibrated under the well seat rubber pad pedestal and the well seat face ring, and the settled well seat face ring is adjusted to be as flat as the road surface, thereby realizing the well seat settlement adjustable function of the present invention.

[0005] The self-locking fastening function is that when installing the inspection manhole cover, align the T screw of the lifting manhole cover with the screw hole of the lifting manhole cover and screw it in, grab the T screw of the lifting manhole cover, align the pawl installation wall with the pawl box and lower it, and under the action of the torsion spring, the sharp self-locking pawl slides down along the rough inner wall of the vertical circle, and the sharp self-locking pawl is used to tighten the manhole cover and the vertical circle for self-locking, thereby realizing the pawl self-locking fastening function of the invention.

[0006] Self-locking, buffering and noise-free function. The self-locking pawl is tightly buckled with the rough inner wall of the vertical circle under the action of the torsion spring and self-locks without loosening, eliminating the impact noise caused by looseness when the car is rolling over, realizing the first self-locking, noise-free function; The sound-absorbing and pressure-resistant rubber pad is glued to the rubber pad pedestal of the well seat. The sound-absorbing and pressure-resistant rubber pad is in a relatively closed space formed by the rubber pad pedestal of the well seat, the vertical circle, the lower beam of the outer ring of the manhole cover, and the bottom surface of the outer ring of the manhole cover. The sound-absorbing and pressure-resistant rubber pad relatively isolates the manhole cover and the well seat from direct contact, so that the manhole cover and the well seat cannot produce friction or seesaw-like impact noise. Even if the sound-absorbing and pressure-resistant rubber pad is aged and cracked into pieces, it can still play the function of buffering and leveling to eliminate the seesaw impact noise in this closed space, realizing the second buffering, leveling and noise-free function.

[0007] Anti-settling function, the manhole seat face ring, manhole seat rubber pad pedestal, ratchet box, manhole seat lifting cone, and cone fixing screws are multi-layered and built together with the roadbed, which can well transmit the various pressures of the manhole cover when it is rolled by the car to the roadbed, and play a very good first anti-settling function; the conical design of the manhole seat lifting cone, which is small at the bottom and large at the top, realizes the second anti-settling function under the extrusion force and reaction force of the roadbed, thereby realizing the anti-settling function of the present invention.

[0008] Easy-to-open function: before opening the manhole cover, unscrew the manhole cover sealing plug, align the lifting manhole cover T screw with the lifting manhole cover screw hole and screw it in. The lifting manhole cover T screw and the opening pawl are obliquely faced, and the opening pawl is pushed downward. The self-locking pawl is simultaneously retracted upward and unlocked by the inner wall of the vertical circle. The lifting manhole cover T screw continues to move forward and faces the bottom of the pawl box. The threaded screw is used to easily and stably lift and open the manhole cover as a whole.

[0009] Safety function, at the connection between the well seat rubber pad pedestal and the well seat lifting cone, a W-shaped anti-fall net hook is designed according to the casting demoulding process for hanging the anti-fall net; a ductile iron anti-fall net pedestal is designed in the well seat lifting cone, and a ductile iron anti-fall net is placed on the ductile iron anti-fall net pedestal, which is the first double-selection anti-fall net safety function of the present invention; after the jacking manhole cover T screw lifts the manhole cover easily and smoothly to open it, grab the jacking manhole cover T screw to move the manhole cover to the direction of the oncoming vehicle, unscrew the jacking manhole cover T screw and the well seat sealing plug, insert construction safety attention flags into the jacking manhole cover screw holes and the jacking manhole seat screw holes to warn vehicles and pedestrians to pay attention to safety, which is the second warning safety function designed on the manhole cover and the well seat of the present invention; when there is no anti-fall net during construction, a simple wooden manhole cover can be made and placed on the well seat rubber pad pedestal to ensure safety, which is the third construction safety function of the present invention.

[0010] Anti-theft function: grab the T screw of the manhole cover and align the pawl installation wall with the pawl box, and lower the manhole cover to the vertical circle. Under the action of the torsion spring, the self-locking pawl slides down tightly along the rough inner wall of the vertical circle. The self-locking pawl and the manhole circle are tightly buckled and self-locked, and can only be opened with the special tool for the manhole cover T screw, thereby realizing the first special tool anti-theft function of the present invention; After the manhole seat is installed, use an impact drill to drill a hole in the roadbed through the cone cylinder fixing circular hole, hammer in the prepared log wedge, and the cone cylinder fixing screw passes through the cone cylinder fixing circular hole and is fastened to the log wedge. Under the action of the extrusion force of the roadbed body and the cone cylinder fixing screw, the manhole seat lifting cone cylinder is more tightly connected with the roadbed body, thereby realizing the second anti-theft function of the present invention; Compared with the existing hinged crowbar that reserves a large gap for opening, the present invention utilizes the T-screw of the manhole cover to lift and open the manhole cover as a whole smoothly. The gap between the outer ring of the manhole cover and the vertical ring is designed to be seamless while meeting the casting demolding process. No crowbar can intervene to pry it open, thus realizing the third anti-theft function of the present invention.

[0011] Anti-backflow function: in case of heavy rain, the backflow of water increases the piercing force of the self-locking ratchet and the vertical circle, and the manhole cover and the manhole seat are more tightly connected. At the same time, the manhole seat lifting cone is more tightly connected to the roadbed under the extrusion force of the roadbed and the cone fixing screws passing through the cone fixing circular hole, which can prevent the manhole cover and the manhole seat from being washed away by the backflow of water while preventing theft. At this time, the water flow pressure in the manhole will reflect a small amount of water from the rainwater leakage hole like a fountain. The sprayed water column is not only a scene in the rain but also a safety warning, which eliminates the safety hazard of the manhole becoming a trap, ensures the safety of vehicles and pedestrians, and realizes the function of the ratchet self-locking anti-backflow and safety warning of the present invention; compared with the existing buckle chain connected to the manhole that can be pried open with a crowbar, the present invention has a strong anti-backflow ability.

[0012] Sealing function, the sound-absorbing and pressure-resistant rubber pad is glued to the well seat rubber pad pedestal, the vertical ring, the lower beam of the outer ring of the well cover, and the bottom surface of the outer ring of the well cover to form a relatively closed space, realizing the first sealing function; the well seat sealing plug sleeve sealing ring is screwed into the jacking well seat screw hole and closely cooperates with the well seat plug pedestal to form the second closed space of the jacking well seat screw hole; the well cover sealing plug sleeve sealing ring is screwed into the jacking well cover screw hole and closely cooperates with the well cover plug pedestal to form the third closed space between the well cover and the ratchet box; because the present invention utilizes the jacking well cover T screw to smoothly lift and open the well cover as a whole, the gap between the well cover and the vertical ring is designed to be micro-gap-free under the premise of meeting the casting demolding process, realizing the fourth micro-gap sealed assembly between the well cover and the vertical ring; the rainwater leakage hole on the well cover is sealed with sealing mud and converted into a sewage well cover, and installed on the well seat with sewage identification, realizing the fifth sealing function of the present invention to block the overflow of sewage odor.

[0013] Leveling function: since the manhole cover and the manhole seat are relatively large castings, affected by the casting process, it is difficult for the manhole cover and the manhole seat rubber pad to cooperate to be absolutely level. Moreover, the manhole cover will also be deformed under any frequent rolling of heavy-loaded vehicles, and it does not have an automatic leveling function. Therefore, due to the unevenness, it is easy to generate a seesaw-like impact noise, causing noise nuisance. The present invention uses the automatic leveling function of the sound-absorbing and pressure-resistant rubber pad to adjust the thickness or number of the sound-absorbing and pressure-resistant rubber pad to fine-tune the leveling of the manhole cover and the road surface, so that the manhole cover and the road surface can be easily adjusted and leveled, which is also the first manhole cover leveling and noise-free function of the present invention; Unscrew the well seat sealing plug and the cone cylinder fixing screw, align the jacking well seat T screw with the jacking well seat screw hole and screw it in. The jacking well seat T screw continues to move forward and aligns with the screw top plate. Use the threaded screw to easily and forcefully lift the well seat as a whole. Then evenly spread the road surface asphalt or concrete mortar material under the well seat rubber pad pedestal and the well seat surface ring and vibrate it to achieve easy adjustment and leveling of the well seat surface ring and the road surface. This is the second well seat leveling function.

[0014] Thereby, the ten functions of the well seat settlement adjustment, self-locking and fastening, no noise, anti-settling, easy opening, safety, anti-theft, anti-backflow, airtightness and flatness are realized.

[0015] The purpose of the present invention can be achieved in this way. The self-locking, silent, easy-to-open, anti-sinking inspection manhole cover used in municipal pipeline projects is composed of five parts: a manhole seat, a manhole seat rubber pad support, a ratchet mounting wall, a manhole cover, and a city business card.

[0016] The well seat is provided with a lifting well seat T screw, a well seat sealing plug, a well seat plug cap, a lifting well seat screw hole, a screw top plate, a lifting well seat angle rib, a vertical ring, a mark fixing screw hole, a well seat sign, and a well seat face ring; The well seat face ring is provided with a lifting well seat screw hole, a mark fixing screw hole, and a well seat sign, and the well seat face ring and the vertical ring are provided with face ring cap reinforcement ribs below the well seat face ring, and the well seat face ring and the vertical ring, the lifting well seat angle ribs, and the face ring cap reinforcement ribs are integrally cast and connected; The lifting well seat angle ribs on both sides of the lifting well seat screw hole correspond to the two side plates of the ratchet box body and the vertical ring cross-cast as a whole, and face ring cap reinforcement ribs are provided together with the vertical ring below the well seat face ring, the well seat rubber pad cap below, and the well seat lifting cone tube, the well seat sealing plug and the cone tube fixing screws are screwed out, and the lifting well seat T screw is screwed in along the lifting well seat screw hole, and is pressed against the screw top plate, so that the well seat is easily lifted up as a whole.

[0017] The well seat rubber pad cap is equipped with a sound-absorbing and pressure-resistant rubber pad, a well seat lifting cone, a ratchet box, a ductile iron anti-fall net cap, a W-shaped anti-fall net hook, a ratchet box drainage hole, a ductile iron anti-fall net, a cone fixing round hole, and a face ring cap reinforcement rib; The well seat rubber pad cap is integrally cast and connected with the well seat lifting cone, the vertical ring, the ratchet box, and the ductile iron anti-fall net cap. The face ring cap reinforcement ribs are added to the bottom of the well seat rubber pad cap and the upper end of the well seat lifting cone, and the bottom of the well seat face ring and the outside of the vertical ring; A ductile iron anti-fall net cap is designed in the well seat lifting cone according to the casting demoulding process; A W-shaped anti-fall net hook is designed on the well seat rubber pad cap along the upper opening of the well seat lifting cone according to the casting demoulding process for the nylon anti-fall net to be hung; The well seat lifting cone is provided with a cone fixing circular hole. After the well seat is installed, use an impact drill to drill a hole on the roadbed along the cone fixing circular hole, hammer in the prepared log wedge, and the cone fixing screw passes through the cone fixing circular hole and is fastened to the log wedge. The well seat lifting cone and the roadbed are more tightly connected through the cone fixing screw.

[0018] The pawl mounting wall is provided with a wall axis pin hole, a torsion spring, a pawl, a pawl axis pin hole, a torsion spring U-clip, an axis pin, an opening pawl limit, an opening pawl, a self-locking pawl, a torsion spring end hidden groove, and a torsion spring end; the pawl mounting wall, the opening pawl limit and the torsion spring end hidden groove are cast and connected at the lower part of the outer side of the manhole cover outer ring, the pawl mounting wall is provided with a wall axis pin hole, the center of the cylindrical body of the pawl is provided with a pawl axis pin hole, the cylindrical periphery of the pawl is provided with a self-locking pawl and an opening pawl, the two ends of the torsion spring are folded into corresponding angles to form a torsion spring end, the middle of the torsion spring is coiled to form a torsion spring U-clip, the torsion spring U-clip is matched with the opening pawl of the pawl, and during assembly, the axis pin first passes through the wall axis pin hole on one side of the pawl mounting wall, and then passes through the torsion spring, the pawl axis pin hole, the other side of the torsion spring and the wall axis pin hole on the other side of the pawl mounting wall in sequence, and at the same time, the torsion spring end is assembled into the torsion spring end hidden groove.

[0019] The manhole cover is provided with a lifting manhole cover screw hole, a lifting manhole cover T screw, a manhole cover sealing plug, a manhole cover plug base, a manhole cover outer ring, a manhole cover outer ring lower beam, an anti-skid surface outer ring strip, anti-skid nails, anti-skid surface structural ribs, rainwater leakage holes, anti-skid surface middle ring strips, structural lower beams, anti-skid surface inner ring strips, and a manhole cover inner ring lower beam; the manhole cover surface layer is provided with an anti-skid surface outer ring strip, an anti-skid surface middle ring strip, and an anti-skid surface inner ring strip, which are connected by anti-skid surface structural ribs and divided into several areas, which have the function of concentrating rainwater leakage, and each area is provided with anti-skid nails and rainwater leakage holes. The rainwater leakage holes are sealed with sealing mud and can be converted into a sewage manhole cover to prevent odor from overflowing; the manhole cover outer ring is provided with a lifting manhole cover screw hole, a manhole cover plug base and anti-skid nails, the manhole cover sealing plug is unscrewed, and the lifting manhole cover T screw is screwed in along the lifting manhole cover screw hole, and it is against the bottom of the ratchet box to easily lift the manhole cover; The two ends of the structural lower beam under the manhole cover are respectively cast and connected with the inner side of the manhole cover outer circle lower beam and the outer side of the manhole cover inner circle lower beam, and the manhole cover panel is cast and connected with the manhole cover outer circle lower beam, the structural lower beam and the manhole cover inner circle lower beam; In order to strengthen the strength of the manhole cover outer circle lower beam, the manhole cover inner circle lower beam and the structural lower beam, on the surface layer of the manhole cover, the manhole cover outer circle lower beam corresponds to the cast connection anti-slip surface outer circle strip, the manhole cover inner circle lower beam corresponds to the cast connection anti-slip surface inner circle strip, and the structural lower beam corresponds to the cast connection anti-slip surface structural rib; Anti-slip spikes of hexagonal shapes and other shapes are cast on the surface layer of the manhole cover in an orderly manner.

[0020] Below the city business card are provided with a cantilever beam, business card bolts, business card fixing holes and screw holes of the cantilever beam. In the center of the manhole cover, you can design a detachable and replaceable manhole cover city business card model that highlights local characteristics, such as local scenic spots, city trees, city flowers or specialties. The business card bolts pass through the business card fixing holes and are connected with the screw holes of the cantilever beam. The city business card is fixed in the center of the manhole cover, showing a city style that is unique, distinctive and full of rural charm.

[0021] First, align the T screw of the jacking well seat with the screw hole of the jacking well seat and screw it in. Grasp the T screw of the jacking well seat and lift the well seat. Align the well seat lifting cone with the inspection well and lower it. Evenly fill the road asphalt or concrete mortar material in the space formed by the well seat rubber pad cap, the well seat face ring, the well seat lifting cone and the roadbed, and vibrate it to make it dense. Then, insert the screw top piece under the screw hole of the jacking well seat. After adjusting the well seat face ring to be level with the road surface, screw out the T screw of the jacking well seat, connect the sealing ring to the well seat sealing plug, screw it in along the screw hole of the jacking well seat and fit it tightly with the well seat plug cap. After the well seat is installed, use an impact drill to drill a hole on the roadbed along the cone fixing hole, hammer in the prepared log wedge, pass the cone fixing screw through the cone fixing hole and tighten it with the log wedge, and use the cone fixing screw to more tightly connect the well seat lifting cone and the roadbed. When assembling the manhole cover, first assemble the pawl, assemble the torsion spring U card and the opening pawl, and pass the axle pin through the wall axle pin hole on one side of the pawl installation wall, and then pass through one side of the torsion spring, the pawl axle pin hole, the other side of the torsion spring and the wall axle pin hole on the other side of the pawl installation wall in sequence, and at the same time assemble the torsion spring end into the hidden groove of the torsion spring end. Under the action of the torsion spring, the inclined surface of the opening pawl is pressed under the limit of the opening pawl. The axle pin, torsion spring and pawl are assembled in place and wait for the assembly of the manhole cover and the well seat; Place the ductile iron anti-fall net on the ductile iron anti-fall net base; or hang the nylon anti-fall net rope on the W-shaped anti-fall net hook in sequence. After connecting the anti-fall net, glue the sound-absorbing and pressure-resistant rubber pad to the well seat rubber pad base; When installing the manhole cover, the T screw of the manhole cover is aligned with the screw hole of the manhole cover and screwed in. The T screw of the manhole cover and the opening pawl are inclined against each other, and the opening pawl is pushed downward. The self-locking pawl is rotated and retracted upward at the same time. Grasp the T screw of the manhole cover, align the pawl installation wall with the pawl box, and align the outer ring of the manhole cover with the vertical circle and lower it. The self-locking pawl slides down along the vertical circle. After the manhole cover and the well seat are installed in place, unscrew the T screw of the manhole cover, connect the sealing ring to the manhole cover sealing plug, screw it into the screw hole of the manhole cover, and closely cooperate with the manhole cover plug base; Under the action of the torsion spring, the sharp self-locking pawl is tightly buckled with the rough inner wall of the vertical circle to self-lock and not loosen. When the car is rolling over, the manhole cover and the vertical circle are synchronously tightened and self-locked, eliminating the impact noise caused by looseness, and realizing the first self-locking and noise-free function; The sound-absorbing and pressure-resistant rubber pad is glued to the rubber pad support platform of the well seat and is in a relatively closed space formed by the vertical ring, the lower beam of the outer ring of the well cover, and the bottom surface of the outer ring of the well cover; because the self-locking pawl presses the well cover and the vertical ring tightly, and the sound-absorbing and pressure-resistant rubber pad isolates the well cover and the rubber pad support platform of the well seat, friction and seesaw-like impact noise cannot be generated. Even if the sound-absorbing and pressure-resistant rubber pad is aged and cracked into pieces, it can still play the second buffering and smooth noise-free function in this closed space;Before opening the manhole cover, unscrew the manhole cover sealing plug, align the T screw of the manhole cover with the screw hole of the manhole cover and screw it in. The T screw of the manhole cover and the opening pawl are facing each other obliquely, push the opening pawl downward, and the self-locking pawl is retracted upward at the same time to disengage and unlock from the inner wall of the vertical circle. The T screw of the manhole cover continues to move forward and faces the bottom of the pawl box. Even if the micro gap between the manhole cover and the manhole seat is stuck by sand, it cannot defeat the strong lifting force of the threaded screw. Use the threaded screw to lift and open the manhole cover as a whole easily and smoothly. Grab the T screw of the manhole cover and easily move the manhole cover to the direction of the oncoming vehicle. Insert the safety construction colored flags in the screw holes of the manhole seat and the manhole cover to warn drivers and pedestrians to pay attention to safety. At this time, the thickness or quantity of the sound-absorbing and pressure-resistant rubber pads can be adjusted to fine-tune the flatness of the manhole cover and the road surface. When the well seat sinks due to reasons such as roadbed sinking and needs to be adjusted, after the well seat sealing plug and cone fixing screw are unscrewed, the well seat T screw is aligned with the well seat screw hole and screwed in. The well seat T screw continues to move forward and collides with the screw top plate. The well seat is lifted up as a whole by force using the threaded screw. The well seat lifting cone is small at the bottom and large at the top. The conical design of the well seat lifting cone prevents sinking under the extrusion force of the roadbed and is also conducive to lifting. Then, the road surface material is evenly laid and vibrated under the well seat rubber pad pedestal and the well seat face ring, and the sunken well seat face ring is adjusted to be as flat as the road surface, realizing the well seat settlement adjustable function of the present invention. ;

[0022] Compared with the prior art, the present invention has the following advantages.

[0023] The well seat settlement is adjustable. When the well seat sinks due to reasons such as roadbed settlement and needs to be adjusted, the well seat sealing plug and the cone cylinder fixing screw are screwed out, and the jacking well seat T screw is aligned with the jacking well seat screw hole and screwed in. The jacking well seat T screw continues to move forward and aligns with the screw top plate, and the threaded screw is used to forcefully lift the well seat as a whole. Due to the conical design of the well seat lifting cone cylinder with a small bottom and a large top, it can prevent settlement and is more conducive to the lifting of the well seat. Then, the road surface asphalt or concrete mortar material is evenly spread under the well seat rubber pad pedestal and the well seat face ring and vibrated, and the settled well seat face ring is easily lifted to the same level as the road surface. After the well seat settlement adjustment is completed, the impact drill is used again to drill holes on the roadbed along the cone cylinder fixing circular hole, and the prepared log wedge is hammered in. The cone cylinder fixing screw passes through the cone cylinder fixing circular hole and is fastened to the log wedge, and the well seat lifting cone cylinder and the roadbed are more tightly connected through the cone cylinder fixing screw. A large amount of labor costs are saved; the existing technology requires major efforts to destroy the road surface, dig up the well seat, and re-level the roadbed.

[0024] The manhole cover and the manhole seat are self-locked and fastened to each other. The self-locking pawl slides down along the rough inner wall of the vertical circle under the action of the torsion spring, and the sharp self-locking pawl is used to tighten the vertical circle of the manhole cover and the manhole seat for self-locking, so that the manhole cover and the manhole seat are self-locked and fastened without loosening; it breaks through the existing technology of various loose connection methods between the manhole cover and the manhole seat.

[0025] . Self-locking and noiseless. The self-locking pawl is tightly buckled with the rough inner wall of the vertical circle under the action of the torsion spring and self-locks without loosening. When the car rolls over, the manhole cover and the vertical circle are simultaneously tightened and self-locked, eliminating the impact noise caused by loosening, and realizing the first self-locking and noise-free function; The sound-absorbing and pressure-resistant rubber pad is in a relatively closed space formed by the manhole seat rubber pad base, the vertical circle, the lower beam of the manhole cover outer ring, and the bottom surface of the manhole cover outer ring. The sound-absorbing and pressure-resistant rubber pad relatively isolates the manhole cover and the manhole seat from direct contact, so that the manhole cover and the manhole seat cannot produce friction or seesaw-like impact noise. Even if the sound-absorbing and pressure-resistant rubber pad is aged and cracked into pieces, it can still play the role of buffering and leveling in this closed space to eliminate the seesaw impact noise, and realize the second buffering and leveling noise-free function; It solves the technical problems and livelihood issues of noise nuisance that the existing technology has long wanted to solve but has not been able to solve.

[0026] It has good anti-settling performance. The manhole seat face ring, manhole seat rubber pad pedestal, ratchet box and manhole seat lifting cone are multi-layered and built together with the roadbed. The cone fixing screws fasten the manhole seat lifting cone to the roadbed. At the same time, the conical design of the manhole seat lifting cone, which is small at the bottom and large at the top, can prevent settlement and is also conducive to jacking. It can well transmit the various pressures of the manhole cover when it is rolled by the car to the roadbed, playing a good anti-settling effect, saving the labor costs of settlement excavation of the manhole, and reducing the labor intensity of workers. However, in the prior art, the various pressures of the car rolling are directly transmitted to the brick or precast concrete manhole, and the uneven force can easily cause damage to the manhole foundation and rapid settlement, and it is impossible to prevent and adjust the subsequent settlement of the manhole cover.

[0027] The manhole cover is easy to open. Before opening the manhole cover, unscrew the manhole cover sealing plug, align the lifting manhole cover T screw with the lifting manhole cover screw hole and screw it in. The lifting manhole cover T screw and the opening pawl are inclined against each other, and the opening pawl is pushed downward. The self-locking pawl is simultaneously retracted upward and unlocked by disengaging from the inner wall of the vertical circle. The lifting manhole cover T screw continues to move forward and is against the bottom of the pawl box. The threaded screw is used to easily and stably lift and open the manhole cover as a whole. Even if the micro gap between the manhole cover and the well seat is stuck by sand, it cannot defeat the strong lifting force of the threaded screw. Therefore, the manhole cover can be easily opened. This solves the problem that once the manhole cover is stuck, it is difficult to open it using the crowbar, hook, and hammering technology of the existing technology.

[0028] Three safety lines: at the connection between the well seat rubber pad pedestal and the well seat lifting cone, a W-shaped anti-fall net hook is designed according to the casting demoulding process for the nylon anti-fall net rope to be hung; or the ductile iron anti-fall net is placed on the ductile iron anti-fall net pedestal, which is the first safety line of the anti-fall net; after the T screw of the lifting manhole cover lifts and opens the manhole cover easily and smoothly, grab the T screw of the lifting manhole cover and move the manhole cover to the direction of the oncoming vehicle, unscrew the T screw of the lifting manhole cover and the well seat sealing plug, and insert construction colored flags into the screw holes of the lifting manhole cover and the lifting manhole seat to warn safety, warning vehicles and pedestrians to pay attention to safety. This is the second warning safety designed on the manhole cover and the well seat; during construction, if the manhole cover is not installed and the anti-fall net is not hung, a simple wooden manhole cover can be made and placed on the rubber pad pedestal of the well seat. This is the third line to ensure construction safety; it breaks through the existing single safety measure of the anti-fall net.

[0029] Anti-theft function: the self-locking pawl is tightly buckled and self-locked with the vertical ring under the action of the torsion spring, and can only be opened with a special tool for lifting the manhole cover T screw. This is the first special tool anti-theft; compared with the existing hinge crowbar that reserves a large gap for opening, the present invention uses the T screw of the manhole cover to lift and open the manhole cover as a whole. The gap between the outer ring of the manhole cover and the vertical ring is designed to be micro-gap-free while meeting the casting demolding process. No crowbar can intervene to pry it open. This is the second micro-gap anti-theft; it breaks through the existing ordinary single anti-theft measure.

[0030] To prevent backflow, in case of heavy rain, the backflow of water increases the piercing force of the self-locking pawl and the vertical circle self-locking, and the manhole seat lifting cone is more tightly connected with the roadbed under the action of the squeezing force of the roadbed and the cone fixing screws, while preventing the manhole cover and the manhole seat from being stolen, it also prevents the manhole cover and the manhole seat from being washed away by the backflow of water. At this time, the water flow pressure in the manhole will spray a small amount of water from the rainwater leakage hole like a fountain. The sprayed water column is not only a scene in the rain but also a safety warning, eliminating the safety hazard of the manhole becoming a trap, and ensuring the safety of vehicles and pedestrians. Compared with the prior art, this invention has both anti-backflow and warning safety effects.

[0031] The sound-absorbing and pressure-resistant rubber pads are glued to the rubber pad pedestal of the well seat, the vertical ring, the lower beam of the outer ring of the well cover, and the bottom surface of the outer ring of the well cover to form a relatively closed space, realizing the first sealing function; the sealing ring of the well cover sealing plug is screwed into the screw hole of the well cover and closely cooperates with the well cover plug pedestal to form the second closed space between the well cover and the ratchet box; since the present invention utilizes the T-screw of the well cover lifting to smoothly lift and open the well cover as a whole, the gap between the well cover and the vertical ring is designed to be seamless with micro-gap while meeting the casting demolding process, realizing the third micro-gap sealed assembly between the well cover and the vertical ring; the rainwater leakage holes on the well cover are sealed with sealing mud to form a sewage well cover, and installed on the well seat with sewage identification, realizing the fourth sealing function of the present invention to block the overflow of sewage odor.

[0032] The leveling adjustment is simple and easy. The present invention uses sound-absorbing and pressure-resistant rubber pads for buffering and leveling to silence noise. At the same time, the thickness or number of sound-absorbing and pressure-resistant rubber pads is adjusted to adjust the height of the manhole cover and the road surface to ensure the leveling of the manhole cover and the road surface. This is the first leveling and noise-free function; unscrew the manhole seat sealing plug and the cone tube fixing screw, align the jacking manhole seat T screw with the jacking screw hole of the manhole seat and screw it in, and the jacking manhole seat T screw continues to move forward and aligns with the screw top plate. The threaded screw is used to easily and forcefully lift the manhole seat as a whole, and then the road surface asphalt or concrete mortar material is evenly spread under the manhole seat rubber pad base and the manhole seat surface ring and vibrated to adjust the manhole seat surface ring to be as flat as the road surface, thereby realizing the second leveling function of the manhole seat surface ring and the road surface.

[0033] A business card is designed for each city. A detachable and replaceable model of the manhole cover city business card is designed in the center of the manhole cover. The business card bolts pass through the business card fixing holes and connect with the screw holes of the lower cantilever beam. The models of the manhole cover city business cards are fixed in the center of the manhole cover to display the style of each city.

[0034] It has wide adaptability. The self-locking pawl and the opening pawl designed on the cylindrical periphery of the pawl can be disassembled and rotated 180 degrees to ensure the sharpness of the self-locking pawl so that the self-locking pawl and the opening pawl can be used interchangeably. The pawl, torsion spring, plug and other accessories can all be formed into standard parts suitable for inspection manhole covers of various types and shapes and sizes of the present invention. Therefore, it has a wider applicability than the prior art.

[0035] The design is ingenious, the cost is low, and the structure is simple, thus realizing ten functions of the manhole seat settlement being adjustable, self-locking, noiseless, easy to open, safe, anti-theft, anti-backflow, airtight, flat, and serving as a city name card, achieving the goal of not disturbing the public with noise at low cost, making society more harmonious, cities more civilized, and manhole covers more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Attached Figure 1 : It is the main view of the structural schematic diagram of the present invention In the figure, 1 is the well seat, 2 is the T screw for lifting the well seat, 3 is the sealing plug for the well seat, 4 is the plugging platform for the well seat, 5 is the screw hole for lifting the well seat, 6 is the screw top plate, 7 is the angle reinforcement for lifting the well seat, 8 is the vertical circle, 9 is the marking fixing screw hole, 10 is the well seat sign, 11 is the well seat face ring, 12 is the rubber pad platform for the well seat, 13 is the sound-absorbing and pressure-resistant rubber pad, 14 is the well seat lifting cone, 15 is the ratchet box, 16 is the ductile iron anti-fall net base, 17 is the W-shaped anti-fall net hook, 18 is the ratchet box drainage hole, 19 is the ductile iron anti-fall net, 20 is the cone fixing round hole, 21 is the face ring base reinforcement rib, 22 is the ratchet installation wall, 23 is the wall axis pin hole, 24 is the torsion spring, 25 is the ratchet, 26 is the ratchet axis pin hole, 27 is the torsion spring U card, 28 is the axis pin, 29 is the opening ratchet limit, 30 is the opening ratchet, 31 is the self-locking ratchet, 32 is the torsion spring end hidden groove, 33 is the torsion spring end, 34 is the manhole cover, 35 is the lifting The screw hole of the manhole cover, 36 is the T screw for lifting the manhole cover, 37 is the sealing plug of the manhole cover, 38 is the manhole cover plug base, 39 is the outer ring of the manhole cover, 40 is the lower beam of the outer ring of the manhole cover, 41 is the outer ring strip of the anti-slip surface, 42 is the anti-slip nail, 43 is the structural reinforcement of the anti-slip surface, 44 is the rainwater leakage hole, 45 is the middle ring strip of the anti-slip surface, 46 is the structural lower beam, 47 is the inner ring strip of the anti-slip surface, 48 is the lower beam of the inner ring of the manhole cover, 49 is the city business card, 50 is the lower cantilever beam, 51 is the business card bolt, 52 is the business card fixing hole, 53 is the screw hole of the lower cantilever beam, and 54 is the cone cylinder fixing screw.

[0037] Attached Figure 2 : is a top view of a schematic diagram of a manhole cover of the present invention In the figure, 34 is the manhole cover, 35 is the screw hole for lifting the manhole cover, 38 is the manhole cover plugging pedestal, 39 is the outer ring of the manhole cover, 40 is the lower beam of the outer ring of the manhole cover, 41 is the outer ring strip of the anti-skid surface, 42 is the anti-skid nail, 43 is the structural reinforcement of the anti-skid surface, 44 is the rainwater leakage hole, 45 is the middle ring strip of the anti-skid surface, 46 is the structural lower beam, 47 is the inner ring strip of the anti-skid surface, 48 is the lower beam of the inner ring of the manhole cover, 49 is the city business card, 50 is the lower cantilever beam, 51 is the business card bolt, 52 is the business card fixing hole, and 53 is the screw hole of the lower cantilever beam.

[0038] Attached Figure 3 : It is a top view of the well seat structure schematic diagram of the present invention In the figure, 1 is the well seat, 4 is the well seat plugging base, 5 is the jacking well seat screw hole, 6 is the screw top plate, 7 is the jacking well seat angle rib, 8 is the vertical circle, 9 is the marking fixing screw hole, 10 is the well seat signboard, 11 is the well seat face ring, 12 is the well seat rubber pad base, 13 is the sound-absorbing and pressure-resistant rubber pad, 14 is the well seat lifting cone, 15 is the ratchet box, 16 is the ductile iron anti-fall net base, 17 is the W-shaped anti-fall net hook, 18 is the ratchet box drainage hole, 19 is the ductile iron anti-fall net, 20 is the cone fixing circular hole, 21 is the face ring base reinforcement rib, and 54 is the cone fixing screw.

[0039] Attached Figure 4: This is the front view of the pawl box and the pawl mounting wall assembly of the present invention In the figure, 18 is the drainage hole of the pawl box, 22 is the pawl mounting wall, 23 is the wall axis pin hole, 24 is the torsion spring, 25 is the pawl, 26 is the pawl axis pin hole, 27 is the torsion spring U card, 28 is the axis pin, 30 is the opening pawl, 31 is the self-locking pawl, 33 is the torsion spring end, 35 is the jacking manhole cover screw hole, and 38 is the manhole cover plug base.

[0040] Attached Figure 5 : This is the right view of the pawl box and the pawl mounting wall assembly of the present invention In the figure, 4 is the well seat plugging platform, 5 is the jacking well seat screw hole, 6 is the screw top plate, 7 is the jacking well seat angle reinforcement, 8 is the vertical circle, 15 is the pawl box, 18 is the pawl box drainage hole, 22 is the pawl mounting wall, 23 is the wall axis pin hole, 24 is the torsion spring, 25 is the pawl, 26 is the pawl axis pin hole, 27 is the torsion spring U card, 28 is the axis pin, 30 is the opening pawl, 31 is the self-locking pawl, 33 is the torsion spring end, 35 is the jacking well cover screw hole, and 38 is the well cover plugging platform. Implementation

[0041] The present invention is further described in conjunction with the accompanying drawings.

[0042] The self-locking, silent, easy-to-open and anti-sinking inspection manhole cover used in municipal engineering pipelines is composed of five parts: a manhole seat 1, a manhole seat rubber pad support 12, a ratchet mounting wall 22, a manhole cover 34, and a city business card 49.

[0043] The well seat 1 is provided with a lifting well seat T screw 2, a well seat sealing plug 3, a well seat plug base 4, a lifting well seat screw hole 5, a screw top plate 6, a lifting well seat angle rib 7, a vertical circle 8, a marking and fixing screw hole 9, a well seat sign 10, and a well seat face ring 11; the well seat face ring 11 is provided with a lifting well seat screw hole 5, a marking and fixing screw hole 9, and a well seat sign 10, the well seat face ring 11 is integrally cast and connected with the vertical circle 8, the lifting well seat angle rib 7, and the face ring base reinforcement rib 21, the lifting well seat angle rib 7 on both sides of the lifting well seat screw hole 5 and the two side surfaces of the pawl box 15 are cast on the same vertical surface through the vertical circle 8, the well seat sealing plug 3 is unscrewed, the lifting well seat T screw 2 is screwed in along the lifting well seat screw hole 5, and is pressed against the screw top plate 6, so that the well seat 1 is easily lifted up as a whole.

[0044] The well seat rubber pad base 12 is provided with a sound-absorbing and pressure-resistant rubber pad 13, a well seat lifting cone 14, a ratchet box 15, a ductile iron anti-fall net base 16, a W-shaped anti-fall net hook 17, a ratchet box drainage hole 18, a ductile iron anti-fall net 19, a cone fixing circular hole 20, and a face ring base reinforcement rib 21; the well seat rubber pad base 12 is integrally cast and connected with the vertical circle 8, the well seat lifting cone 14, and the ratchet box 15, and the well seat rubber pad base 12 and the vertical circle 8 and the well seat lifting cone 14 are provided with a face ring base reinforcement rib 21, and a ductile iron anti-fall net base 16 is designed in the well seat lifting cone 14 according to the casting demoulding process; a W-shaped anti-fall net hook 17 is designed on the well seat rubber pad base 12 along the upper mouth of the well seat lifting cone 14 for the selection of nylon anti-fall net hanging according to the casting demoulding process.

[0045] The pawl mounting wall 22 is provided with a wall axis pin hole 23, a torsion spring 24, a pawl 25, a pawl axis pin hole 26, a torsion spring U card 27, an axis pin 28, an opening pawl limit 29, an opening pawl 30, a self-locking pawl 31, a torsion spring end hidden groove 32, and a torsion spring end 33; the pawl mounting wall 22, the opening pawl limit 29 and the torsion spring end hidden groove 32 are cast and connected below and outside the outer ring 39 of the manhole cover, the pawl mounting wall 22 is provided with a wall axis pin hole 23, the center of the cylindrical body of the pawl 25 is provided with a pawl axis pin hole 26, and the outer periphery of the cylindrical body of the pawl 25 is provided with an opening Open the pawl 30 and the self-locking pawl 31, and fold the two ends of the torsion spring 24 into corresponding angles to form a torsion spring end 33. The middle of the torsion spring 24 is coiled to form a torsion spring U-card 27. The torsion spring U-card 27 is matched with the opening pawl 30 of the pawl 25. The axle pin 28 first passes through the wall axle pin hole 23 on one side of the pawl mounting wall 22, and then passes through one side of the torsion spring 24, the pawl axle pin hole 26 and the other side of the torsion spring 24, and the wall axle pin hole 23 on the other side of the pawl mounting wall 22 in sequence, and at the same time, the torsion spring end 33 is assembled into the torsion spring end hidden groove 32.

[0046] The manhole cover 34 is provided with a manhole cover lifting screw hole 35, a manhole cover lifting T screw rod 36, a manhole cover sealing plug 37, a manhole cover plug base 38, a manhole cover outer ring 39, a manhole cover outer ring lower beam 40, an anti-skid surface outer ring strip 41, anti-skid nails 42, an anti-skid surface structural rib 43, a rainwater leakage hole 44, an anti-skid surface middle ring strip 45, a structural lower beam 46, an anti-skid surface inner ring strip 47, and a manhole cover inner ring lower beam 48; The surface layer of the manhole cover 34 is provided with an anti-skid outer ring strip 41, an anti-skid middle ring strip 45, and an anti-skid inner ring strip 47, which are connected by anti-skid structural ribs 43 and divided into several areas, and have the function of concentrating rainwater leakage. Each area is provided with anti-skid nails 42 and rainwater leakage holes 44. The rainwater leakage holes 44 are sealed with sealing mud and can be converted into a sewage manhole cover to prevent odor from overflowing; the manhole cover outer ring 39 is provided with a lifting manhole cover screw hole 35, a manhole cover plug base 38 and anti-skid nails 42, the manhole cover sealing plug 37 is screwed out, and the lifting manhole cover T screw 36 is screwed in along the lifting manhole cover screw hole 35, and it is against the bottom surface of the ratchet box 15, so that the manhole cover 34 can be easily lifted up; the bottom of the manhole cover 34 The two ends of the structural lower beam 46 are respectively cast and connected with the inner side of the manhole cover outer circle lower beam 40 and the outer side of the manhole cover inner circle lower beam 48, and the manhole cover 34 panel is cast and connected with the manhole cover outer circle lower beam 40, the structural lower beam 46 and the manhole cover inner circle lower beam 48; in order to strengthen the strength of the manhole cover outer circle lower beam 40, the manhole cover inner circle lower beam 48 and the structural lower beam 46, on the surface layer of the manhole cover 34, an anti-skid surface outer circle strip 41 is cast and connected corresponding to the manhole cover outer circle lower beam 40, an anti-skid surface inner circle strip 47 is cast and connected corresponding to the manhole cover inner circle lower beam 48, and an anti-skid surface structural rib 43 is cast and connected corresponding to the structural lower beam 46; orderly arranged hexagonal and other shaped anti-skid spikes 42 are cast on the surface layer of the manhole cover 34.

[0047] A lower cantilever beam 50, a business card bolt 51, a business card fixing hole 52, and a lower cantilever beam screw hole 53 are provided below the city business card 49; a detachable and replaceable city business card 49 of the manhole cover 34 is designed at the center of the manhole cover 34, and the business card bolt 51 passes through the business card fixing hole 52 and is connected with the lower cantilever beam screw hole 53, so that the city business card 49 of the manhole cover 34 is fixed at the center of the manhole cover 34 to display the urban style of a city.

[0048] During the construction of municipal pipeline engineering, first align the lifting well seat T screw 2 with the lifting well seat screw hole 5 and screw it in, grab the lifting well seat T screw 2 by hand or lift the well seat face ring 11 by hand to lift the well seat 1, align the well seat lifting cone 14 with the inspection well and lower it, evenly fill the road surface asphalt or concrete mortar material in the space formed by the well seat rubber pad base 12, the well seat face ring 11, the well seat lifting cone 14 and the roadbed and vibrate and compact it, then insert the screw top sheet 6 under the lifting well seat screw hole 5, adjust the well seat face ring 11 to be level with the road surface, screw out the lifting well seat T screw 2, put the well seat sealing plug 3 on the sealing ring, screw it in along the lifting well seat screw hole 5 and tightly cooperate with the well seat plug base 4; After the well seat 1 is installed, use an impact drill to drill a hole on the roadbed along the cone fixing hole 20, hammer in the prepared log wedge, and pass the cone fixing screw 54 through the cone fixing hole 20 to fasten with the log wedge, and the well seat lifting cone 14 is more tightly connected to the roadbed through the cone fixing screw 54; When assembling the manhole cover 34, first assemble the pawl 25, the torsion spring U card 27 cooperates with the opening pawl 30, the shaft pin 28 passes through the wall shaft pin hole 23 on one side of the pawl installation wall 22, and then passes through one side of the torsion spring 24, the pawl shaft pin hole 26 and the other side of the torsion spring 24, and the wall shaft pin hole 23 on the other side of the pawl installation wall 22 in sequence, and at the same time, assemble the torsion spring end 33 into the torsion spring end hidden groove 32, and under the action of the torsion spring 24, the inclined surface of the opening pawl 30 is pressed under the opening pawl limit 29, and the shaft pin 28, torsion spring 24, and pawl 25 are assembled in place and wait for the assembly of the manhole cover 34 and the well seat 1; Place the ductile iron anti-falling net on the ductile iron anti-falling net base 16; Or hang the nylon anti-falling net on the W-shaped anti-falling net hook 17 in sequence, and after connecting the anti-falling net, fix the sound-absorbing and pressure-resistant rubber pad 13 on the well seat rubber pad base 12 with glue; When installing the manhole cover 34, the T screw rod 36 of the manhole cover is aligned with the screw hole 35 of the manhole cover and screwed in. The T screw rod 36 of the manhole cover and the opening pawl 30 are obliquely opposed to each other, and the opening pawl 30 is pushed downward. The self-locking pawl 31 is rotated and retracted upward at the same time. The T screw rod 36 of the manhole cover is grasped, and the pawl installation wall 22 is aligned with the pawl box 15, and the outer ring 39 of the manhole cover is aligned with the vertical circle 8 and lowered. The self-locking pawl 31 slides down along the vertical circle 8. After the manhole cover 34 and the well seat 1 are installed in place, the T screw rod 36 of the manhole cover is screwed out, and the sealing ring of the manhole cover sealing plug 37 is sleeved on the sealing ring and screwed in along the screw hole 35 of the manhole cover to closely cooperate with the manhole cover plug base 38; Under the action of the torsion spring 24, the sharp self-locking pawl 31 is tightly locked with the rough inner wall of the vertical circle 8 and self-locked without loosening, and the manhole cover 34 is pressed against the vertical circle 8 to eliminate the impact noise caused by looseness when the car rolls over, and the first self-locking and noise-free function is realized; the sound-absorbing and pressure-resistant rubber pad 13 is glued to the manhole seat rubber pad support platform 12, and the sound-absorbing and pressure-resistant rubber pad 13 is placed in a relatively closed space formed by the manhole seat rubber pad support platform 12, the vertical circle 8, the manhole cover outer ring lower beam 40, and the bottom surface of the manhole cover outer ring 39;Since the self-locking pawl 31 presses the manhole cover 34 against the vertical ring 8, and the sound-absorbing and pressure-resistant rubber pad 13 isolates the manhole cover 34 from the manhole seat rubber pad support 12, friction and seesaw-like impact noise cannot be generated. Even if the sound-absorbing and pressure-resistant rubber pad 13 is aged and cracked into pieces, it still plays the second buffering, leveling and noise-absorbing function in this closed space; When opening the manhole cover 34, the manhole cover sealing plug 37 is first screwed out, and then the lifting manhole cover T screw 36 is aligned with the lifting manhole cover screw hole 35 and screwed in. The lifting manhole cover T screw 36 and the opening ratchet 30 are obliquely opposed to each other, and the opening ratchet 30 is pushed downward, and the self-locking ratchet 31 is simultaneously retracted upward and unlocked from the inner wall of the vertical circle 8, and the lifting manhole cover T screw 36 continues to move forward and confronts the bottom surface of the ratchet box 15. Even if the micro gap between the manhole cover 34 and the well seat 1 is stuck by sand, it cannot defeat the strong lifting force of the threaded screw. The manhole cover 34 is easily and smoothly lifted and opened as a whole by using the threaded screw. The lifting manhole cover T screw 36 is grabbed and the manhole cover 34 is easily moved to the direction of the oncoming vehicle. The safety construction colored flags are inserted in the lifting well seat screw hole 5 and the lifting manhole cover screw hole 35 to warn drivers and pedestrians to pay attention to safety. At this time, the thickness or quantity of the sound-absorbing and pressure-resistant rubber pad 13 can be adjusted to fine-tune the flatness of the manhole cover 34 and the road surface. When the well seat 1 sinks due to reasons such as roadbed sinking and needs to be adjusted, after the well seat sealing plug 2 and the cone cylinder fixing screw 54 are screwed out, the well seat T screw 2 is aligned with the well seat screw hole 5 and screwed in, and the well seat T screw 2 continues to move forward and collides with the screw top plate 6, and the well seat 1 is lifted up as a whole with strong force and ease by using the threaded screw. The well seat lifting cone 14 is designed with a small bottom and a large top to prevent sinking under the extrusion force of the roadbed body and is also conducive to lifting. Then, the road surface material is evenly spread and vibrated under the well seat rubber pad pedestal 12 and the well seat face ring 11, and the settled well seat face ring 11 is raised to be as flat as the road surface, realizing the adjustable sinking function of the well seat 1 of the present invention. ;

Claims

1. Self-locking, silent, easy-to-open, anti-sinking manhole cover, its characteristics are The invention is composed of five parts: a well seat (1), a well seat rubber pad support (12), a ratchet mounting wall (22), a well cover (34), and a city name card (49); the well seat (1) is provided with a well seat T screw (2), a well seat sealing plug (3), a well seat plug support (4), a well seat screw hole (5), a screw top plate (6), a well seat angle rib (7), a vertical ring (8), a mark fixing screw hole (9), a well seat sign (10), and a well seat face ring (11); the well seat face ring (11) is provided with the well seat screw hole (5), the mark fixing screw hole (9), and the well seat sign (10); the well seat face ring (11) is connected to the vertical ring The ring (8), the lifting well seat angle rib (7), and the face ring support platform reinforcement rib (21) are integrally cast and connected. The lifting well seat angle rib (7) on both sides of the lifting well seat screw hole (5) and the two sides of the ratchet box (15) are cast on the same vertical surface through the vertical ring (8). The well seat sealing plug (3) is screwed out, and the lifting well seat T screw (2) is screwed in along the lifting well seat screw hole (5) and pressed against the screw top plate (6), so that the well seat (1) is easily lifted up as a whole; the well seat rubber pad support platform (12) The utility model is provided with a sound-absorbing and pressure-resistant rubber pad (13), a well seat lifting cone cylinder (14), the ratchet box (15), a ductile iron anti-falling net support platform (16), a W-shaped anti-falling net hook (17), a ratchet box drainage hole (18), a ductile iron anti-falling net (19), a cone cylinder fixing circular hole (20), and the surface ring support platform reinforcement rib (21); the well seat rubber pad support platform (12) is integrally cast and connected with the vertical ring (8), the well seat lifting cone cylinder (14), and the ratchet box (15). The well seat rubber pad support platform (12) and the vertical ring (8) and the well seat lifting cone (14) are provided with the face ring support platform reinforcement rib (21); the ductile iron anti-fall net support platform (16) is designed in the well seat lifting cone (14) according to the casting demoulding process; the W-shaped anti-fall net hook (17) is designed on the well seat rubber pad support platform (12) along the well seat lifting cone (14) according to the casting demoulding process for hanging the nylon anti-fall net; the ratchet mounting wall (22) is provided with a wall shaft pin hole (23), a torsion spring (24), a ratchet (25), a ratchet shaft pin hole (26), a torsion spring U-clip (27), a shaft pin (28), an opening ratchet limit (29), an opening ratchet (30), a self-locking ratchet (31), a torsion spring end hidden groove (32), and a torsion spring end (33);The pawl mounting wall (22), the opening pawl limiter (29) and the torsion spring end hidden groove (32) are cast and connected below and outside the manhole cover outer ring (39); the pawl mounting wall (22) is provided with the wall body shaft pin hole (23); the center of the cylindrical body of the pawl (25) is provided with the pawl shaft pin hole (26); the outer periphery of the cylindrical body of the pawl (25) is provided with the opening pawl (30) and the self-locking pawl (31); the torsion spring ( The two ends of the torsion spring (24) are folded into corresponding angles to form the torsion spring end (33), the middle of the torsion spring (24) is coiled to form the torsion spring U clamp (27), the torsion spring U clamp (27) is matched with the opening pawl (30) of the pawl (25), the shaft pin (28) first passes through the wall shaft pin hole (23) on one side of the pawl mounting wall (22), and then passes through one side of the torsion spring (24), the pawl shaft pin hole (26), the other side of the torsion spring (24) and the wall shaft pin hole (23) on the other side of the pawl mounting wall (22), and at the same time, the torsion spring end (33) is assembled into the torsion spring end hidden groove (32); the manhole cover (34) The invention is provided with a manhole cover screw hole (35), a manhole cover T screw rod (36), a manhole cover sealing plug (37), a manhole cover plug support (38), the manhole cover outer ring (39), a manhole cover outer ring lower beam (40), an anti-skid surface outer ring strip (41), an anti-skid nail (42), an anti-skid surface structural rib (43), a rainwater leakage hole (44), an anti-skid surface middle ring strip (45), a structural lower beam (46), an anti-skid surface inner ring strip (47), and a manhole cover inner ring lower beam (48); the manhole cover (34) is provided with the anti-skid surface outer ring strip (41), the anti-skid surface middle ring strip (45), and the anti-skid surface inner ring strip (47) on the surface layer, which are connected by the anti-skid surface structural rib (43) and divided into several areas, which have the function of concentrating rainwater leakage, and each area is provided with the anti-skid nail (42) and the rainwater leakage hole (44), and the manhole cover (34) is provided with the anti-skid surface outer ring strip (41), the anti-skid surface middle ring strip (45), and the anti-skid surface inner ring strip (47). After the rainwater leakage hole (44) is sealed with sealing mud, it can be cast into a sewage manhole cover to prevent odor from overflowing; the manhole cover outer ring (39) is provided with the manhole cover lifting screw hole (35), the manhole cover plugging platform (38) and the anti-slip nail (42), the manhole cover sealing plug (37) is screwed out, and the manhole cover lifting T screw (36) is screwed in along the manhole cover lifting screw hole (35) and pressed against the bottom surface of the ratchet box (15), so as to easily lift the manhole cover (34); the two ends of the structural lower beam (46) below the manhole cover (34) are respectively cast and connected with the inner side of the manhole cover outer ring lower beam (40) and the outer side of the manhole cover inner ring lower beam (48), and the manhole cover (34) panel is cast and connected with the manhole cover outer ring lower beam (40), the structural lower beam (46) and the manhole cover inner ring lower beam (48);In order to strengthen the strength of the manhole cover outer circle lower beam (40), the manhole cover inner circle lower beam (48), and the structural lower beam (46), on the surface layer of the manhole cover (34), the anti-skid surface outer circle strip (41) is cast and connected to the manhole cover outer circle lower beam (40), the anti-skid surface inner circle strip (47) is cast and connected to the manhole cover inner circle lower beam (48), and the anti-skid surface structural rib (43) is cast and connected to the structural lower beam (46); the anti-skid spikes (42) in an orderly arranged hexagonal shape are cast on the surface layer of the manhole cover (34); the city name card (49) A lower cantilever beam (50), a name card bolt (51), a name card fixing hole (52), a lower cantilever beam screw hole (53), and a cone cylinder fixing screw (54) are provided at the lower part; a detachable and replaceable city name card (49) of the manhole cover (34) is designed at the central position of the manhole cover (34); the name card bolt (51) passes through the name card fixing hole (52) and is connected to the lower cantilever beam screw hole (53); the city name card (49) of the manhole cover (34) is fixed at the central position of the manhole cover (34) to display the urban style of a city; during the construction of the municipal pipeline project, the jacking well seat T screw rod (2) is first aligned with the jacking well seat screw hole (5) and screwed in; the jacking well seat T screw rod (2) is grasped by hand or the well seat face ring (11) is lifted by hand; the well seat lifting cone cylinder (14) is aligned with the inspection well and lowered; the road surface asphalt or concrete mortar is placed on the well seat. The material is uniformly filled in the space formed by the well seat rubber pad support (12), the well seat face ring (11), the well seat lifting cone (14) and the roadbed and vibrated to be dense, and then the screw top plate (6) is inserted into the bottom of the lifting well seat screw hole (5), and after adjusting the well seat face ring (11) to be level with the road surface, the lifting well seat T screw (2) is screwed out, and the well seat sealing plug (3) is sleeved with the sealing ring and screwed into the lifting well seat screw hole (5) to be tightly matched with the well seat plug support (4); after the well seat (1) is installed, a percussion drill is used to drill a hole on the roadbed along the cone cylinder fixing circular hole (20), and a prepared round log wedge is hammered in, and the cone cylinder fixing screw (54) passes through the cone cylinder fixing circular hole (20) and is fastened to the round log wedge, and the well seat lifting cone (14) and the roadbed are more tightly connected through the cone cylinder fixing screw (54);When assembling the manhole cover (34), first assemble the pawl (25), the torsion spring U clamp (27) cooperates with the opening pawl (30) of the pawl (25), and the shaft pin (28) passes through the wall shaft pin hole (23) on one side of the pawl mounting wall (22), and then passes through one side of the torsion spring (24), the pawl shaft pin hole (26), the other side of the torsion spring (24) and the wall shaft pin hole (23) on the other side of the pawl mounting wall (22) in sequence, and at the same time, assemble the torsion spring end (33) into the torsion spring end hidden groove (32). Under the action of the torsion spring (24), the inclined surface of the opening pawl (30) is pushed below the opening pawl limit (29), and the shaft pin (28), the torsion spring (24) and the pawl (25) are assembled in place to wait for the assembly of the manhole cover (34) and the manhole seat (1); The ductile iron anti-fall net (19) is placed on the ductile iron anti-fall net support (16), or the nylon anti-fall net is hung on the W-shaped anti-fall net hook (17) in sequence. After the anti-fall net is connected, the sound-absorbing and pressure-resistant rubber pad (13) is fixed on the well seat rubber pad support (12) by gluing; when installing the well cover (34), the T screw rod (36) of the well cover is aligned with the screw hole (35) of the well cover, and the well cover is lifted. The T screw (36) and the opening pawl (30) are inclined against each other, the opening pawl (30) is pushed downward, and the self-locking pawl (31) is rotated and retracted upward at the same time, the T screw (36) of the lifting manhole cover is grasped, the pawl mounting wall (22) is aligned with the pawl box (15), and the manhole cover outer ring (39) is aligned with the vertical ring (8) and lowered, and the self-locking pawl (31) slides down along the vertical ring (8), and the manhole cover (34) is lifted. ) and the well seat (1) are installed in place, unscrew the T screw (36) of the lifting well cover, put the sealing ring on the well cover sealing plug (37), screw it along the screw hole (35) of the lifting well cover and tightly fit with the well cover plug support (38); under the action of the torsion spring (24), the sharp self-locking pawl (31) and the rough inner wall of the vertical ring (8) are tightly locked and self-locked without loosening, so that the well cover (34) and the vertical ring are fixed. (8) The tightening self-locking eliminates the impact noise caused by looseness when the car rolls over, and realizes the noise-free function of the first self-locking without loosening; the noise-absorbing and pressure-resistant rubber pad (13) is glued to the well seat rubber pad support platform (12), and the noise-absorbing and pressure-resistant rubber pad (13) is installed in a relatively closed space formed by the well seat rubber pad support platform (12), the vertical ring (8), the lower beam (40) of the outer ring of the well cover, and the bottom surface of the outer ring (39) of the well cover;Since the self-locking pawl (31) presses the manhole cover (34) against the vertical ring (8), and the sound-absorbing and pressure-resistant rubber pad (13) isolates the manhole cover (34) from the manhole seat rubber pad support platform (12), friction and seesaw-type impact noise cannot be generated. Even if the sound-absorbing and pressure-resistant rubber pad (13) is aged and cracked into pieces, it still plays the second noise-free function of buffering, leveling and silencing in this closed space. When opening the manhole cover (34), the manhole cover sealing plug (37) is first unscrewed, and then the lifting manhole cover T screw (36) is aligned with the lifting manhole cover. The screw hole (35) is screwed in, the lifting manhole cover T screw rod (36) and the opening pawl (30) are obliquely pressed against each other, the opening pawl (30) is pushed downward, and the self-locking pawl (31) is simultaneously retracted upward and unlocked from the inner wall of the vertical ring (8), and the lifting manhole cover T screw rod (36) continues to move forward and presses against the bottom surface of the pawl box (15), even if the micro gap between the manhole cover (34) and the manhole seat (1) is blocked by sand, it cannot resist the strong lifting force of the threaded screw rod, and the manhole cover (34) is lifted and opened as a whole by the threaded screw rod, and the manhole cover (34) is grasped. The manhole cover T screw (36) can easily move the manhole cover (34) to the direction of the oncoming vehicle, and colorful flags for safety construction are inserted into the screw holes (5) and the screw holes (35) of the manhole cover to warn drivers and pedestrians to pay attention to safety; at this time, the thickness or number of the sound-absorbing and pressure-resistant rubber pads (13) can be adjusted to adjust the flatness of the manhole cover (34) and the road surface; when the manhole cover (1) sinks due to reasons such as roadbed sinking and needs to be adjusted, the manhole cover sealing plug (3) and the cone cylinder fixing screw (54) are screwed out, and the manhole cover T screw (2) is aligned with the required height. The lifting well seat screw hole (5) is screwed in, and the lifting well seat T screw (2) continues to move forward and abuts against the screw top plate (6), and the well seat (1) is lifted up as a whole by the threaded screw. The well seat lifting cone (14) is designed to be small at the bottom and large at the top, which prevents subsidence under the extrusion force of the roadbed and is also conducive to lifting. Then, the road surface material is evenly laid and vibrated under the well seat rubber pad support (12) and the well seat surface ring (11), and the settled well seat surface ring (11) is raised to be as flat as the road surface, so as to realize the adjustable function of the well seat (1) of the present invention. ;

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