67results about How to "Increased stability" patented technology

The invention provides a construction method and construction device for a data warehouse model. The method comprises the steps of constructing a business model by business modeling and conducting abstraction processing on the business model to generate a domain model; dividing the domain model into a plurality of topic models by using multiple topics; determining the mapping relationship betweenentities of each topic model according to the business logic; constructing the data warehouse model according to the mapping relationship between the entities of each topic model. The method divides the domain model into multiple topic models, which is beneficial for fully and effectively achieving data analysis and mining; the mapping relationship between the entities of each topic model is determined according to the business logic, the data warehouse model is constructed, and the stability and scalability of data are effectively improved.

The invention discloses a method for assembling a split stator core and an assembly tool used thereby. The method comprises the following steps: a first core unit is placed on a splicing table with the outer cylindrical surface of an inner tube as a datum plane, and a positioning groove in the outer side face of the core unit and a positioning element on the top of the splicing table are positioned through embedding fit; other core units are sequentially spliced into a circular stator core through a connecting bulge and a connecting recess of the core unit; the stator core is tightly hooped by a hoop; the two ends of each weld are spot-welded and pre-fixed by laser; and the hoop divides each weld into an upper section and a lower section, and the upper section and the lower section of each weld are spot-welded by laser. According to the method of the invention, the core units are spliced by the inner tube and the hoop, which can improve the welding deformation resistance. The welds are pre-fixed by spot welding and spot-welded based on the principle of symmetry, which ensures the rounding precision of the stator core and improves the connecting strength. Moreover, the energy output of a single point of spot welding is low, the core has a small heat-affected zone and less deformation, and an inner water jacket and the stator core can be smoothly connected in a sleeving mode and fit tightly.

A memory card socket is provided, the main body (3) of which is composed of a first metal shell (1) and a second metal shell (2), wherein only the first metal shell (1) is pressed on a base (7) fixed on a contact block (4), and the second metal shell (2) is combined on the first metal shell (1) by the methods such as laser welding in order to prevent the main body (3) of the socket from deforming caused by the external force applied when inserting and pulling. Therefore, the second metal shell (2) is provided with a first abut piece (20) and a second abut piece (19), wherein the first abut piece (20) is abutted with the front of the base (7) from the front side, and the second abut piece (19) is projecting from the base (7) in the rear side and is abutted with the rear part of the base (7) from the rear side.

The invention provides a visual plugging evaluation device and a use method thereof. The device comprises a simulated wellbore mechanism, a simulated formation mechanism and a measuring mechanism which are sequentially connected. The simulated wellbore mechanism comprises a compressed gas source, a compressed gas pipeline and a vertically arranged slurry pipe which are sequentially connected. Thesimulated formation mechanism comprises a visual pipe and an outlet valve which are horizontally arranged and sequentially connected. The measuring mechanism is connected with the outlet valve. The visual plugging evaluation device simulates different pore formations through particle fillers with different diameters, pressurized plugging is performed by using the plugging slurry of certain centration, the plugging process and results of the plugging agent bridging in the pores are observed and the effect of the plugging formula is evaluated. According to the plugging evaluation device, the plugging process can be directly observed and monitored anytime so as to be convenient and easy to use.

The invention discloses cooling tower packing with inclined folded waves. The packing comprises a water spraying plate. A wave-shaped connecting side is arranged on a water spraying plate in the transverse direction. The section shape of the wave-shaped connecting side is a continuous isosceles trapezoid without a bottom. Two waists of the isosceles trapezoid are in a shape of a folding line and form step-shaped connecting lateral sides. Bonding points are arranged on the wave-shaped connecting side. Cooling waves are arranged between the step-shaped connecting lateral sides. The cooling waves comprise an upper cooling wave and a lower cooling wave. The upper cooling wave and the lower cooling wave are distributed symmetrically with the middle wave-shaped connecting side as the symmetry center. Viscous flow wave grooves are formed in the surfaces of the cooling waves at intervals. Compared with the existing packing, the packing has the advantages of being large in cooling surface area, good in cooling effect, large in use strength, long in service life and small in ventilating resistance.

The invention discloses an anti-falling waterproof Bluetooth sound box structure used on a desktop, which comprises a sound box body and sound outlet holes formed in the front surface of the sound boxbody, and is characterized in that four corners of the sound box body are respectively and fixedly connected with a mounting cylinder, and relates to the technical field of Bluetooth sound boxes. According to the anti-falling waterproof Bluetooth sound box structure used on the desktop, the distance between the fixing plate and the sound box body is adjusted by rotating the fixing plate, a certain distance is formed between the sound box body and the desktop while stable placement of the sound box body is guaranteed, and therefore water on the desktop is prevented from directly entering the interior of the device; with the arrangement of the anti-collision mechanism, the sound box body is comprehensively protected in the upper, lower, left, right, front and back directions, the anti-falling performance of the sound box body is effectively improved, and when the sound box body vibrates, the water retaining cloth enables the water retaining plate to be attached to the transverse plate under the acting force of the contraction spring, so that the waterproof effect of the device is improved. And the condition that the sound outlet hole is blocked by dust can be effectively prevented.

The invention relates to the technical field of agricultural breeding, and discloses a lean meat pig training device. The device comprises a breeding bin body, a feed box is fixedly installed at the bottom of the right side in a cavity of the breeding bin body, and a pressing device is arranged at the bottom of the middle of the breeding bin body and comprises a pressing plate and a rotating rod.According to the lean meat pig training device, by arranging the pressing device, after a feeder throws feed into the feed box in the cavity of the breeding bin body, bred lean meat pigs must pass through the pressing plate when going to the feed box, and when the lean meat pigs pass through the pressing plate, the lean meat pigs must press and tread the pressing plate through the weight of themselves; the left side of the pressing plate is limited and stabilized through a supporting rod in the pressing process, the four limbs of the lean meat pigs can be exercised in the pressing and treadingprocess of the lean meat pigs on the pressing plate, the exercise amount of the lean meat pigs is increased by conducting powerful four-limb training on the lean meat pigs going to the feed box to befed each time, and therefore the lean meat production efficiency of the lean meat pigs is improved; and finally, the economic benefit of a farm is improved.

The invention discloses a connector which comprises transmission elements with a plurality of conductors arranged on the single surfaces thereof and an insulating body, wherein the insulating body is provided with an accommodating port; a plurality of terminal slots are formed on the upper and the lower wall surfaces of the accommodating port; a group of first terminals and a group of second terminals are respectively arranged in the terminal slots; one end of each first terminal is correspondingly connected with the conductors on the single surfaces of the transmission elements, and the other end thereof is connected with butt joint pieces; and one end of each second terminal is correspondingly connected with the conductors on the single surfaces of the transmission elements, and the other end thereof is also connected with the butt joint pieces. The transmission elements are electrically connected and fixed through pressure exertion in an identical direction, the design improves the stable strength of the fixation of the transmission elements in the accommodating port, and dispenses with the staggered insertion of signals and a grounding cable and the assembly procedure of forming connecting terminals by bending, so as to simplify the entire manufacturing process and reduce cost.

The invention discloses a refractory brick prefabricated part, which comprises a fourth positioning block, a refractory brick body, a third through hole and a fourth positioning hole, the top of the refractory brick body is provided with a first positioning block and a second positioning block, and The first positioning block is set on the left side of the second positioning block, the bottom of the refractory brick body is provided with a first positioning hole and a second positioning hole, and the first positioning hole is set on the left side of the second positioning hole, the refractory brick body A third positioning hole and a fourth positioning hole are arranged on the left side wall, and the third positioning hole is arranged above the fourth positioning hole, and a third positioning block and a fourth positioning block are arranged on the right side wall of the refractory brick body, The top of the refractory brick body is provided with a first through hole and a second through hole, and the right side wall of the refractory brick body is provided with a third through hole. The invention is convenient for masonry, convenient for masonry construction of the kiln body, scientific and reasonable in structure, firm in connection, excellent in heat insulation ability, and can effectively guarantee service life and quality.

The invention discloses an assembly for a bridge pavement and a preparation method of the assembly. The preparation method includes the following steps of preparation and cleaning of a die, smearing of a release agent, preparation of a work site, rebar installation, concrete pouring, installation of a metal pipe, installation of a fixing shaft, disassembly of the die, maintenance of concrete blocks and assembly of the concrete blocks. The first concrete block and the second concrete block are assembled, rebars are arranged in the second concrete block, the hardness and compressive strength of the assembly can be improved, the assembly can resist collision of vehicles, due to the fact that the first concrete blocks are installed in a groove of the bridge pavement, the groove is filled with concrete, the first concrete block can be firmly combined with a bridge, and the stabilizing strength of the assembly is improved.

The invention discloses an agricultural single greenhouse and a putting up method thereof, and belongs to the technical field of green agricultural production equipment. The agricultural single greenhouse is characterized in that an angle iron shaped base surrounding a greenhouse bottom by circle is arranged on the greenhouse bottom, strengthened by column-shaped ground piles and fixed with arch bracings, diagonal bracings and greenhouse head stand columns via screws, and main arches and a main beam are connected with connecting pieces. The agricultural single greenhouse is reasonable in design, simple in structure, convenient to mount, high in stability and strong in firmness. Joints are fixed via screws, secondary galvanization of steel material and potential safety hazards like rosin joint are avoided, and the agricultural single greenhouse is applicable to popularization and application in large scale.

The invention discloses insulated isolation cloth, and the cloth comprises a waterproof layer, a supporting layer and a lining layer from the outside to the inside. The supporting layer comprises an upper bonding layer, a lower bonding layer, and an insulating layer between the upper bonding layer and the lower bonding layer. The inner side of the waterproof layer is bonded with the upper bonding layer, and the inner side of the lining layer is bonded with the lower bonding layer. The edge of the cloth is provided with a plurality of insulating hanging rings (6), and the insulating hanging rings (6) are respectively provided with a hanging rope (7), wherein the other end of each hanging rope (7) is provided with an insulating hook (8). The cloth provided by the invention can cover adjacent electrified bodies at an interval, and the edge of the cloth is firmly fixed with an electric appliance through the hanging ropes (7) and the insulating hooks (8). Even if a maintainer tumbles accidentally, electric shock cannot happens to the maintainer, so the cloth can avoid the accidental electric shock.

A novel re-feeding device for Czochralski grown monocrystalline is provided, including a re-feeding cylinder, a quartz umbrella disposed at the lower end of the re-feeding cylinder and a fixed frame at the upper end of the re-feeding cylinder. The re-feeding cylinder sequentially includes, from one end close to the fixed frame, a first cylinder part, a second cylinder part and a third cylinder part. The first, second and third cylinder parts are integrally connected, the inner diameter of the first cylinder part is greater than the inner diameter of the third cylinder part, and the height of the first cylinder part is not less than the height of the third cylinder part. The re-feeding device can increase the re-feeding amount of each cylinder, can reduce the oxygen content of head gaps ofmonocrystalline silicon rods, and can improve monocrystalline silicon quality. The service lifetime of the re-feeding device is prolonged, the production efficiency is increased and the production cost is reduced. The invention also provides an operating method of the novel re-feeding device for Czochralski grown monocrystalline. The method is particularly suitable for re-feeding for monocrystalline silicon with a large size and a large feeding amount. Through the method, quality of monocrystalline silicon rods can be ensured, and the crystal yield is increased by about 4%.

The invention discloses a refractory-brick prefabricated member for a rotary kiln. The refractory-brick prefabricated member comprises a fourth positioning block, a refractory brick body, a third through-hole and a fourth positioning hole. A first positioning block and a second positioning block are arranged at the top end of the refractory brick body, the first positioning block is arranged on the left side of the second positioning block, a first positioning hole and a second positioning hole are formed in the bottom of the refractory brick body, and the first positioning hole is formed in the left side of the second positioning hole; a third positioning hole and the fourth positioning hole are formed in the left side wall of the refractory brick body, the third positioning hole is formed above the fourth positioning hole, and a third positioning block and the fourth positioning block are arranged on the right side wall of the refractory brick body; and a first through-hole and a second through-hole are formed in the top end of the refractory brick body, and the third through-hole is formed in the right side wall of the refractory brick body. According to the refractory-brick prefabricated member for the rotary kiln, the bricklaying is convenient, the bricklaying construction of a kiln body is convenient, the structure is scientific and reasonable, and the connection is firm; and the refractory-brick prefabricated member further has an excellent heat-insulating capability, and the service life and the quality can be effectively guaranteed.

The invention relates to novel stiffening cloth, wherein a cloth material yarn is prepared from at least one fiber or various fibers by blended spinning, and also comprises low-temperature polyester staple fibers of which the content is 2 to 90 percent of the whole body of the cloth material yarn, the low-temperature polyester staple fibers are arranged between at least one adjacent fiber or various fibers, and the low-temperature polyester staple fibers are melt down at high temperature to form bonding media so that adjacent fibers are bonded with one another. The novel stiffening cloth has the advantages of high strength, good stiffening effect, stable cloth material dimensions, and the like. A method for processing the novel stiffening cloth comprises three steps of spinning, weaving and shaping, wherein the shaping method has a simple process without needing to pass through resin stiff finish, and can add different amounts of the low-temperature polyester staple fibers according to product requirements to generate different hardness on the cloth surfaces. The novel stiffening cloth adopts a new method to replace the prior resin processing and finishing process, so that the cloth materials generate stiffening effects and have stable dimensions.

The invention discloses a pure pneumatic sand core full-automatic transferring sling which comprises a hoisting ring, an overturning connecting rod and an opening-closing air cylinder, wherein the hoisting ring is fixedly arranged in the middle of the top side of a cross beam; positioning plate lifting air cylinders are arranged on the cross beam on the two sides of the hoisting ring; connecting plates are arranged at the top; sand core height positioning blocks are connected with the lower sides of the connecting plates through four guide pillars; two bearing pedestals are symmetrically arranged on the outer sides of the bottom wall of the cross beam;tips at the two ends of an overturning driving shaft and an opening-closing shaft are mounted on the inner sides of the bearing pedestals; and the overturning driving shaft is rotatably mounted; two graphite copper bush linear bearings are symmetrically arranged on the two side walls of the cross beam; and the four guide pillars are mounted in the graphite copper bush linear bearings in a sliding manner, so that the guide pillars can be effectively limited to prevent the guide pillars from deflected motion during the up-down moving process so as to avoid damage to the guide pillars.

The invention discloses a banana type scaffold. The banana type scaffold mainly comprises vertical rods, a transverse rod, an inclined rod, cross arms, a ladder and a tread plate, wherein a connecting disk is arranged on the vertical rods in a spaced mode, wedged inserting heads correspondingly buckled to the connecting disk are arranged at the two ends of the transverse rod, the wedged inserting heads of the transverse rod are fixed to the vertical rods through the connecting disk in an insertion mode, the inclined rod which is obliquely arranged and the ladder crossing with the inclined rod are fixedly connected between the vertical rods through pin shafts, and the tread plate is fixedly arranged between the cross arms of the vertical rods. The vertical rods, the transverse rod and the inclined rod are coated with fluorescent layers. The connecting disk is hexagonal and evenly provided with inserting holes, and a round convex edge is arranged at the inner circle of the connecting disk. The banana type scaffold has the advantages of being convenient to install and high in stability.

The invention provides a precast concrete pipe pile. The precast concrete pipe pile comprises at least two hollow concrete pipe pile sections sequentially distributed from top to bottom and a pile section connecting device used for connecting the every two adjacent concrete pipe pile sections, the precast concrete pipe pile comprises a plurality of steel bars arranged on the inner walls of the concrete pipe pile sections and arranged in the axial direction, and end plates arranged at the ends of the concrete pipe pile sections, each pile section connecting device comprises a connecting ring plate with the same outer diameter as the two adjacent concrete pipe pile sections, clamping devices protruding outwards are fixedly arranged at the upper end and the lower end of the center of each connecting ring plate, a plurality of through holes I are evenly formed in each connecting ring plate, a blocking piece is arranged in the middle of the interior of each through hole I, and each blockingpiece is made of silumin which is used for being bonded with the steel bars protruding out of the ends of the two concrete pipe pile sections in a heating state. The precast concrete pipe pile is simple in structure and convenient to use, and the connecting strength between the adjacent concrete pipe pile sections is improved.

The invention provides a ladder for cable overhauling, and relates to the field of power equipment. A ladder body is included and comprises a left ladder frame and a right ladder frame. A plurality ofsupporting plates distributed at intervals are arranged between the left ladder frame and the right ladder frame. An upper auxiliary fixing device is arranged at the upper end of the ladder body andcomprises an upper auxiliary plate. An upper connecting shaft is arranged between the upper end of the left ladder frame and the upper end of the right ladder frame. The upper auxiliary plate is rotationally connected to the upper connecting shaft. An upper anti-skid pad is arranged at the rear portion of the upper auxiliary plate. A tool storage cavity is formed in the upper auxiliary plate. A lower auxiliary fixing device is arranged at the lower end of the ladder body. The ladder has the beneficial effects that the stability of the ladder is improved, the difficulty of climbing work is reduced, and the overhauling efficiency is improved.

The invention discloses an organic silicon modified water-based PA adhesive emulsion for a shading curtain coating and a preparation method of the organic silicon modified water-based PA adhesive emulsion, which belong to the field of polymer functional materials. The water-based adhesive emulsion comprises the following components: an acrylate monomer, acrylic acid, a functional monomer, an organic silicon monomer, an initiator, an emulsifier and deionized water. The preparation method comprises the following steps of: the acrylate monomer is subjected to free radical emulsion polymerization;the silicone monomer is added, the organic silicon modified water-based polyacrylate emulsion is obtained; according to the emulsion, the organic silicon monomer is added to participate in reaction;the compatibility and stability of the water-based PA emulsion with titanium dioxide, kaolin and other fillers are improved, the coating fastness and water resistance fastness are improved, the hole sealing performance is improved, the coating gluing amount is reduced, the cost is reduced, the product competitiveness is improved, in addition, due to the fact that the gluing amount is reduced (thefastness is not reduced), the finished product is softer and more comfortable in hand feeling, and the quality is improved.

The invention discloses a supporting structure in an arc end of a U-shaped GRG decorative sheet. The supporting structure comprises a T-shaped supporting frame and a plurality of bolt connecting pieces. The supporting structure is characterized in that the T-shaped supporting frame is a frame formed by welding angle steel, the middle portion of a cross rod (1) of the supporting frame is fixedly welded with one end of a straight rod (2) of the supporting frame, and the cross rod is perpendicular to the straight rod to be in a T shape. The two ends of the cross rod and the other end of the straight rod (2) are separately provided with bolt connecting holes. Bolt connecting pieces (5) are matched with the bolt connecting holes at the two ends of the cross bar and at the other end of the straight rod (2). The supporting structure in the arc end of the U-shaped GRG decorative sheet has the advantages that the T-shaped supporting frame is simple in structure and convenient to manufacture, the installation construction quality of the U-shaped GRG decorative sheet is improved, transportation damage hidden dangers are reduced, the loss of labor is reduced, construction period shortening isfacilitated, and the engineering cost is reduced.

The invention discloses an assembly for a bridge pavement and a preparation method of the assembly. The preparation method includes the following steps of preparation and cleaning of a die, smearing of a release agent, preparation of a work site, rebar installation, concrete pouring, installation of a metal pipe, installation of a fixing shaft, disassembly of the die, maintenance of concrete blocks and assembly of the concrete blocks. The first concrete block and the second concrete block are assembled, rebars are arranged in the second concrete block, the hardness and compressive strength of the assembly can be improved, the assembly can resist collision of vehicles, due to the fact that the first concrete blocks are installed in a groove of the bridge pavement, the groove is filled with concrete, the first concrete block can be firmly combined with a bridge, and the stabilizing strength of the assembly is improved.

The invention provides a stable combined electric vehicle frame made of extruded profiles, and relates to the technical field of electric vehicle frames, the stable combined electric vehicle frame comprises a blocking frame and an inclination sensor, a goods shelf is welded to one end of the blocking frame, the cross section of the goods shelf is in a shape like a Chinese character'ri ', and a stable structure is arranged on the surface of the blocking frame and comprises two supporting rods; the two supporting rods are slidably inserted into the surface of the blocking frame, the arc face of each supporting rod is sleeved with a spring A, the two ends of each spring A are fixedly connected with the corresponding supporting rod and the blocking frame respectively, a containing groove is formed in the lower end of each supporting rod, a spring B is fixedly connected to the inner wall of each containing groove, and a bottom plate is fixedly connected to the lower end of each spring B. By means of the frame, the problems that after a traditional frame is assembled into an electric vehicle in the later period, the stability of the frame is ordinary, and especially for a three-wheel electric vehicle to go uphill, the frame of the traditional electric vehicle is prone to rollover when running on an uphill road section are solved.

The invention relates to the field of spaceflight and discloses a controllably and orderly inflated self-supporting type solar sail structure. A sail surface approximately triangle-shaped and formed by three curves is adopted, the sail surface can be unfolded in orbit stably and orderly, and distribution gradient of internal plane stress forced on the sail surface after unfolding is reduced by 20%; a support ring with the inner diameter equal to a winding shaft is arranged at the position of rectangular vertice of the sail surface, and concentrated stress of the sail surface can be lowered; a circular opening enclosed by 4n (n is larger than or equal to 3, and n is an integer) sawteeth, and no relative movement between the vertice of the sail surface and the winding shaft can be guaranteed; four sets of inflated extension arms used for supporting the sail surface are unfolded, each set is formed by two extension arms, straightness of the inflated extension arms and rigidity of the inflated extension arms after being unfolded can be improved, the rigidity of the structure is two times of that of a structure with a single extension arm, and unfolding stability of the extension arms is improved.

A car guide rail support comprises a wall body connection frame fixed on a wall board through an expansion screw and formed by an angle iron. At least two adjusting frames formed by the angle iron and perpendicular to the wall board are welded on a wall body connection frame. A guide rail connection frame arranged horizontally and formed by the angle iron is welded, and a car guide rail is fixedly installed on the guide rail connection frame at least through bolts, nuts, gaskets and a guide rail fixing plate. Two adjusting frames are arranged between the wall body connection frame and the guide rail connection frame in parallel and are connected through welding. An adjusting kidney-shaped round hole is formed in each adjusting frame which is fixed with the guide rail connection frame through bolts and nuts. The wall body connection frame is fixed on the wall body through expansion screws arranged flatly on the left and the right. The car guide rail support has the advantages of being simple in structure, convenient to use and install and capable of expanding onsite installation adjusting range, improving the whole stability and firmness and reducing installation and manufacture cost and the like.

The invention discloses a method for machining a prefocusing plate through a finish turning clamp. The method for machining a threaded hole in a spherical shell portion of the prefocusing plate through the finish turning clamp for the prefocusing plate comprises the following steps of 1, connecting a connecting disc of the finish turning clamp for the prefocusing plate with a spindle flange through bolts; 2, mounting the central threaded hole in the spherical shell portion of the prefocusing plate onto a double-end stud in a penetration manner, so that a locating boss on the spherical shell portion is arranged in a locating spigot, and after the prefocusing plate is adjusted, sequentially screwing nuts mounted on the double-end stud in a penetration manner, so that the prefocusing plate isfixed to a prefocusing plate locating block; and 3, starting a lathe spindle, drilling a threaded bottom hole through a drill bit in the first place, then, machining a taper hole in the front end ofthe threaded bottom hole through a turning tool, and then, tapping a thread in the threaded bottom hole through a reamer, so that the process is completed. Compared with the prior art, the method aimsat solving the problems that the threaded hole, forming a 25-degree angle with the axis of the central threaded hole, in the existing prefocusing plate is low in machining work efficiency and high inproduction cost.

The invention discloses an assembly method and assembly tooling of a segmented stator core, comprising: taking the outer cylindrical surface of the inner tube as the reference plane, placing the first iron core unit on the splicing platform, and positioning recesses on the outer surface of the iron core unit The slot fits and locates with the positioning piece on the top surface of the splicing table; other core units are sequentially spliced ​​through the connecting convex part and connecting concave part of the core unit to form a ring-shaped stator core; the stator core is tightened with a hoop; The laser pre-fixes the two ends of each welding seam by spot welding; the hoop divides each welding seam into upper and lower sections, and uses laser to perform spot welding on the upper and lower sections of each welding seam. The invention utilizes the inner tube and the hoop to splice the iron core unit, which can improve the welding deformation resistance, combined with the principle of symmetry, spot welding pre-fixation and spot welding seam, ensures the rounding accuracy of the stator core, improves the connection strength, and simultaneously spot welds a single point The energy output is low, the heat-affected zone of the core is small, and the deformation is small, which can ensure the smooth connection and tight fit of the inner water jacket and the stator core.

The invention relates to intelligent manhole cover management, in particular to a municipal alarming manhole cover. The municipal alarming manhole cover includes a bottom plate (1) and an arc-shaped cover plate (2) with convex middle, wherein an installing groove (3) is formed in the middle of the inner side of the arc-shaped cover plate (2), connecting bars (4) in a honeycomb shape are integrately formed on the inner part of the arc-shaped cover plate on the periphery of the installing groove (3), the bottom plate (1) covers the bottom of the arc-shaped cover plate (2) through bolts, a sealing plate (5) is formed in a notch of the installing groove (3) through an internal thread in a sealed mode, and a wireless alarming device is installed in the installing groove. According to the municipal alarming manhole cover, damage to the wireless alarming device by installing workers during the violent construction condition is completely avoided, information of the wireless alarming device isenriched, judgment of the wireless alarming device is accurate, error alarming due to the fact that an alarm signal of the wireless alarming device is too simple is avoided.