74 results about "Outer annulus" patented technology

This invention relates to planetary damping spring dampers for gearboxes. Specifically, a planetary gear arrangement includes planetary gears rotatable on planetary bearings mounted to a bracket of the planetary gear arrangement via support pins. A damping spring is disposed between the outer surface of the outer ring of the bearing and the opposing inner surface of the planetary gear, and includes an annular gap. A spring diaphragm damper is disposed between the cylindrical outer surface of the support pin and the opposing inner surface of the inner ring of the planetary bearing, and also includes an annular gap. The support pin (96) and / or the outer ring includes an oil supply hole leading to the corresponding annular gap. Gas turbine engines include planetary gear arrangements having such planetary bearings.

A method for tripping out of an underbalanced well, the method comprising: determining the drilling fluid balance density and the annular pressure loss outside the drill pipe; determining the time for oil and gas to surge to the wellhead and the tripping time to the depth of the first injected gas plug, and comparing them to determine whether the conditions for safe operation are met; if the conditions for safe operation are met, determining the density and volume of the first gas plug based on the drilling fluid balance density and the annular pressure loss outside the drill pipe; tripping out of the well based on the density and volume of the first gas plug, completing the tripping out of the first gas plug; determining the density and volume of the gas plug at the depth near the wellhead using a preset method based on the depth after the tripping out of the first gas plug; and completing the tripping out of the gas plug near the wellhead based on the determined density and volume of the gas plug at the depth near the wellhead.

This utility model discloses an adjustable and replaceable device for reducing vibration of rotating equipment in marine environments, comprising: an outer pipe, a main shaft, and a bearing bracket. The outer pipe is coaxially arranged with the main shaft, and the bearing bracket is sleeved on the outside of the main shaft. An annular groove is provided on the inner wall of the outer pipe at a position corresponding to that of the bearing bracket. A positioning ring is detachably installed in the annular groove. An outer ring is provided on the outer edge of the bearing bracket, and the outer ring cooperates with the positioning ring. The positioning ring reduces the fitting gap, improves the overall stability of the bearing bracket and the outer pipe, and thus enhances the stability of the bearing and pump unit. It can reduce the vibration amplitude of the rotating equipment and improve the long-term safe and stable operation capability of the rotating equipment in marine environments. The addition of the 316L positioning ring simplifies on-site construction, and the positioning ring can be adjusted and replaced in a timely manner according to the subsequent vibration of the rotating equipment.

The utility model relates to metallurgy, chemical equipment sealing connection technical field, concretely is sleeve furnace rotary joint double -sealed leakproof structure, including static pipe and rotating pipe, and the integrated connection pipe that goes into the inside of static pipe is formed on rotating pipe, and one sealed bearing is installed on the inner ring wall of connection pipe, and the integrated connection ring that is connected with sealed bearing is formed in static pipe. The utility model discloses a sealed bearing is arranged on the inner ring wall of the connection pipe of rotating pipe, and the interference fit of its outer ring and connection pipe, inner ring and static pipe connection ring forms first heavy sealing, and the structure of the annular sealing groove is set up simultaneously in the outer ring wall of connection pipe, and the sealing convex ring of cooperation outer sealing pipe forms second heavy rotary seal, and the leakproof performance of rotary joint is improved significantly in double -sealed structure, the threaded connection mode of outer sealing pipe and static pipe, the close adhesion of sealed convex ring and annular sealing groove is guaranteed, and it is convenient to install and maintain, realizes the reliable sealing when static pipe and rotating pipe relatively rotate.

This invention relates to a test fixture and method for testing the airflow of a turbine guide vane. The fixture includes an inlet side and an outlet side, which are connected to form a clamping groove. The inlet side includes an outer inlet ring and an inner inlet ring, and the outlet side includes an outer outlet ring and an inner outlet ring. The end of the outer inlet ring furthest from the outer outlet ring is inclined towards the axis of the outer inlet ring, and the end of the outer inlet ring closest to the outer outlet ring has a rounded corner on its inner sidewall. The sidewall of the inner inlet ring furthest from the outer outlet ring is conical, and the apex of the conical sidewall of the inner inlet ring has a rounded corner, as does the end of the conical sidewall furthest from its apex. The fixture in this design minimizes air pressure and flow loss during airflow testing of the turbine guide vane, thus reducing measurement errors in the test results to a minimum.

The utility model relates to the technical field of waste mineral oil processing, especially to a kind of processing device for waste mineral oil, it is set up screwing drive reciprocating movable discharging mechanism, can be mixed into waste mineral oil with auxiliary material evenly discharged, improve practicability;Including fixed base, bucket support, mixing bucket, support one, hopper, hose, support two, sliding block, threaded sleeve, threaded rod, upper connecting frame, sliding frame and reciprocating motor, the fixed base top end ring side through multiple groups of bucket support and the outer ring side of mixing bucket bottom end are connected, the fixed base top end rear side is connected with the outside of hopper through support one, the fixed base top end middle side is connected with the bottom end of support two, the inner top end middle side of support two is connected with the top end of sliding block, the inner wall of sliding block is connected with the outer wall of threaded sleeve, the inner wall of threaded sleeve is connected with the outer wall of threaded rod screwing, sliding frame front side is connected with the rear side of reciprocating motor, the output end of reciprocating motor is connected with the front side of threaded rod, threaded rod rotation is set in the inside of sliding frame.

The utility model discloses an electric heating nonmetal container mounting structure, including nonmetal's container body, the base of fastening in the lower extreme of container body, be used for the electric heating device of heating the liquid in container body, the bottom of container body is provided with the round clamping portion, its diameter is less than the diameter of container body, and the outer wall of clamping portion is provided with annular clamping slot, still include support, it includes outer ring, at least two mounting plates of radial regular distribution, and the inner wall upper end of outer ring is provided with annular clamping edge, the outer ring of support is fixed in the annular clamping slot of clamping portion through annular clamping edge clamping, and the base is sleeved on the clamping portion of installing support, and is locked through fastener between base and the mounting plate of support, the utility model discloses install and dismantle more swift and convenient, do not use liquid gum or sealing ring, avoid water leakage, more safe and sanitary.

The utility model belongs to mould technical field, concretely relates to a mould for outer ring machining, including lower die plate and upper die plate, the upper surface center of lower die plate is connected with the central column, the upper surface of lower die plate is connected with two half die rings respectively through adjusting assembly, is equipped with rubber bag between half die ring and central column, the bottom of rubber bag is equipped with the compression ring that is penetrated its bottom side and is compressed on the upper surface of lower die plate, is equipped with water filling subassembly between compression ring and lower die plate. The utility model, through first water inlet, docking pipe fitting and second water inlet, the rubber bag inside is filled with water, after rubber bag water expansion extrusion annular blank is attached to the inner wall of half die ring and realizes shaping, after shaping, the water body in the rubber bag is discharged through second water inlet, docking pipe fitting and first water inlet, when the hand wheel drives the rotation of the lead screw in the vertical block, half die ring axial movement is driven through the docking seat, so that two half die rings move to the direction of mutual separation, so that the discharge of annular piece after shaping can be facilitated.

The utility model relates to the technical fields of pressure vessel manufacturing, in particular to pressure vessel manufacturing is used cylinder roundness correction device, it can carry out inside and outside roundness correction to pressure vessel cylinder, effectively improves the roundness correction effect to pressure vessel cylinder, improves practicality, including work table, four groups of support legs are fixedly connected to the work table bottom end rim annular array, double -shaft motor fixed mounting is in work table bottom end center, the fixed connection has gear disc on double -shaft motor downside output shaft, three groups of L type support are fixedly connected to the work table top rim annular array, and outer reciprocating screw rod rotation is installed on the work table, three groups of outer hydraulic cylinders are fixedly installed on the annular array of outer ring outer wall, three groups of outer hydraulic cylinder output all are fixedly connected with outer support, and three groups of outer support all rotatoryly install outer correction cylinder, the inner roundness correction mechanism includes cylinder, is used for the roundness correction in the cylinder, the fixed mechanism includes three groups of clamping frame, is used for fixing cylinder.

This invention discloses a deterministic ultra-precision chemical mechanical polishing method and apparatus for shaft-type parts. The invention includes: acquiring roughness error data of the outer annular surface of the shaft-type part before polishing by uniformly sampling points using a white light interferometer and fitting the data; selecting time-controlled polishing parameters; calculating the dwell time distribution; and performing chemical mechanical polishing on the outer annular surface of the shaft-type part using a polishing machine; acquiring measurement data obtained from uniformly sampling points on the outer annular surface of the shaft-type part using a white light interferometer and fitting the data to obtain the roughness data of the outer annular surface of the shaft-type part after polishing; and determining whether the roughness data of the entire shaft-type part after polishing meets the requirements to select iterative processing or terminate the processing. This invention aims to achieve highly efficient automated processing of sub-nanometer roughness of the entire shaft-type part, realizing high-efficiency and high-precision shaft-type part processing.

This application relates to a uniformly blowing argon nozzle, belonging to the field of steelmaking technology. It includes a main body with a central drain hole and an annular groove on its outer wall. Multiple blowing holes are circumferentially arranged within the main body, with their ends located within the drain hole and the annular groove, respectively. An annular filter screen and an outer ring are arranged within the annular groove, with the outer ring sealing the opening of the groove. A blowing nozzle is fixed to the outer ring. A baffle is fixed to the filter screen opposite the blowing nozzle. A gap is maintained between the filter screen and the end of the blowing hole, and also between the filter screen and the outer ring. In this application, argon gas is compressed and passes through the filter screen and filter screen sequentially, allowing for relatively uniform argon gas flow through both screens, thereby improving the uniformity of the airflow entering each blowing hole and preventing deflection of the molten steel flow. The main body is composed of an upper and lower half, facilitating the manufacture of the annular groove and the installation of objects within it.

This invention provides a circumferential airflow homogenizing device, an engine, and an aircraft. The device includes an annular cavity component, multiple air intake pipes, and multiple circumferential pipes. The annular cavity component is disposed outside and coaxially with the annular structure requiring air supply. The annular cavity has an outer annular surface and an inner annular surface. The multiple air intake pipes are symmetrically and evenly distributed on the outer annular surface of the annular cavity and communicate with the annular cavity. The multiple circumferential pipes are symmetrically and evenly distributed on the inner annular surface of the annular cavity and connected to the annular cavity at both ends. The air intake pipes and circumferential pipes are not coaxial. Airflow enters the annular cavity component through the air intake pipes, and after being homogenized in terms of flow rate and velocity within the annular cavity component, it flows to the annular structure through the circumferential pipes. The technical solution of this invention addresses the technical problem of the lack of a circumferential airflow homogenizing device for radially inlet annular structures in the prior art.

This invention relates to the field of steam turbine units, specifically to a steam turbine nozzle ring clamping ring installation structure, including a nozzle outer ring. A slanted groove is formed on the top of the upper surface of the nozzle outer ring. A retaining ring is movably fitted inside the slanted groove on the surface of the nozzle outer ring. An annular groove is formed in the middle of the upper surface of the retaining ring. A contact surface A is provided on one side of the retaining ring near the annular groove, and a contact surface B is provided on the other side of the retaining ring near the annular groove. Through the radial positioning of the nozzle outer ring and the cylinder annular groove, and the three-point support of the double contact surfaces of the retaining ring, the overall coaxiality of the nozzle ring is ensured, preventing damage to the dynamic-static clearance due to radial movement, ensuring steam flow efficiency, and improving the steam turbine's work capacity. Furthermore, the elastic compensation design of the spliced ​​clamping band can evenly distribute circumferential pressure, and its axial contact surface with the top of the nozzle outer ring can effectively counteract the upward thrust of steam impact, reducing localized wear of components and extending the service life of the nozzle ring and related components.

The application relates to the technical field of aviation modified engines and discloses an annular backflow combustion chamber and an aero-engine. The annular backflow combustion chamber comprises an inner casing assembly, an outer casing assembly provided with a first nozzle mounting seat, a flame tube comprising an outer ring assembly and an inner ring assembly, an evaporation cavity assembly which is connected between the outer ring assembly and the inner ring assembly and is located at the head of the flame tube, and the evaporation cavity assembly is provided with a first nozzle hole; and an evaporation nozzle which is arranged in the outer casing assembly and the nozzle outlet of the evaporation nozzle is arranged in the evaporation cavity assembly. Compared with the mode that the evaporation pipe is arranged outside the outer ring of the flame tube, the evaporation cavity assembly of the application is connected between the outer ring assembly and the inner ring assembly of the flame tube and is located at the head of the flame tube, so that the evaporation cavity assembly is not affected by the limitation of the radial dimension of the combustion chamber, sufficient evaporation length and oil-gas mixing space can be ensured, fuel atomization and evaporation are more sufficient, and the combustion efficiency of the annular backflow combustion chamber is improved.

The utility model relates to the field of vehicle wheel design and manufacturing technology, the utility model discloses a novel ring type shaftless wheel, including inner ring stator, the inner ring stator is annular columnar structure, is used for fixedly connected in the vehicle body, and the outer wall is provided with excitation coil along the circumference, outer ring rotor, the annular structure of the outer ring rotor is set up in the outer side of inner ring stator, and the inner wall is provided with permanent magnet along the circumference, permanent magnet and excitation coil concentric opposite and gap cooperation, form electromagnetic drive pair, tire main part, be located in the outer wall of outer ring rotor, this novel ring type shaftless wheel adopts the shaftless design of inner ring stator fixed, outer ring rotor rotation, is different from the traditional motor vehicle wheel and needs through the axle support, external power drive and rotation, cancels center axle and wheel hub completely, makes the hollow region of wheel center form through, adapts to the scene that needs large diameter wheel and needs to utilize the central space, solved the structural limitation of traditional shafted wheel center space unable to utilize.

This utility model discloses a filter fastening and adjustment mechanism for a bag filter dust collector, including a tube sheet with a through hole inside. An outer annular groove is formed above the outside of the through hole inside the tube sheet, and the outer annular groove communicates with the through hole. A filter bag is placed inside the through hole of the tube sheet. The filter bag includes a bag body and a bag opening ring edge, which are sewn together. The bag opening ring edge is located inside the outer annular groove. A frame mounting plate is provided above the bag opening ring edge, and the frame mounting plate is annular. A fastener is provided above the frame mounting plate, and the fastener includes a lower pressure plate, an upper pressure plate, and a rubber ring. The rubber ring is fixedly installed above the lower pressure plate. This mechanism achieves filter fastening capability, increases practicality, and solves the problem that traditional bag filter dust collectors often use simple bolt and nut fastening or spring compression methods, resulting in poor practicality.

The utility model provides a kind of cold slag machine and boiler equipment component, the purpose is to solve the technical problems that dust particles in the material cavity of existing disc type cold slag machine are easy to escape.This cold slag machine includes water chamber, sealing mechanism and push mechanism;Water chamber is annular, and multiple are arranged along vertical direction, and gap constituting material cavity is left between two adjacent water chambers;Water chamber is provided with discharge channel communicating its upper and lower surfaces;Sealing mechanism is composed of two annular pieces;Sealing mechanism is provided with four groups, respectively located the upper and lower surfaces of water chamber, and corresponding to the inner and outer ring walls of water chamber;Push mechanism is provided with multiple, and corresponds to material cavity one by one;Push mechanism includes inner ring and outer ring, and the upper and lower sections of inner ring and outer ring are located between the two annular pieces of upper and lower sealing mechanism respectively;Multiple radial extension scraping plates are evenly arranged between inner ring and outer ring.This cold slag machine effectively closes the material cavity between water chamber, thereby avoiding the escape of dust particles in material cavity.

The application discloses an oil pipe and a preparation method and application thereof in oil pipe repair, and belongs to the technical field of oil exploitation equipment accessories, and comprises an oil pipe body. The application forms a precise splicing structure through an outer ring groove one at the front end of the oil pipe body and an adjusting ring rotatably arranged at the other end. The original butt joint of multiple oil pipes in situ can be completed in the oil pipe without pulling out the whole pushed-in oil pipe. A guide block one is circumferentially arranged on the outer ring groove one, and is matched with a sawtooth groove one, an arc-shaped groove one and a positioning hook groove one which are integrated on the inner side of the adjusting ring, and a disc spring which is arranged outside the outer ring groove one, so as to form a self-locking limiting mechanism. When splicing, the sawtooth groove one can guide the smooth sliding of the guide block one into the arc-shaped groove one, and after splicing in place, the disc spring releases the elastic force to accurately push the guide block one into the positioning hook groove one to form rigid clamping.

The utility model discloses an engine oil pan gasket with filter screen, including outer ring gasket, filter screen, limit card edge strip, sucking disc perforated seat. The utility model has the advantages that: through setting gasket main part between engine body and oil pan, can realize the advanced filtration of oil, can filter first before oil suction, reach the function of not polluting oil pump filter screen, one side surface of outer ring gasket is connected with limit card edge strip, and limit card edge strip is located at the connecting part of filter screen and outer ring gasket, through setting limit card edge strip and placing in the installation position of outer ring gasket, can ensure accurate positioning installation of outer ring gasket, and the net body of filter screen is connected with sucking disc perforated seat, and the conveying pipeline of oil sucking disc is arranged in sucking disc perforated seat, and the conveying pipeline of oil sucking disc can pass through sucking disc perforated seat, and through the effect of filter screen, can filter first before oil suction, realize the function of not polluting oil pump filter screen.

The application discloses a double-sealing leak-proof injection-molded cup cover structure, which comprises a cup cover body and a double-sealing structure, is provided with a straw insertion part in the center, and is sequentially provided with an air outlet hole part, a stacking part and an anti-skid part around. The air outlet hole part is used for discharging the air pressure generated by hot drinks in the cup body, the stacking part is used for stable connection when multiple cup covers are stacked, and the anti-skid part is used for enhancing the hand gripping friction force when a customer takes the cup cover and puts it on the cup body. The double-sealing structure comprises an outer annular sealing protrusion and a lower extension outer ring wall, two-stage sealing is formed through an injection molding process, and liquid leakage is effectively prevented. The application has the advantages of simple structure, injection molding integration, convenient stacking and storage and significantly improved leak-proof performance.

This invention discloses an air-assisted reverse circulation drilling cuttings guiding device for permafrost, relating to the field of drilling equipment technology. It includes a double-walled drill rod and an inner drill rod. An outer drill bit is installed at the end of the double-walled drill rod, with a cuttings guiding channel formed by the gap between the two. The inner drill rod is rotatably positioned within the cuttings guiding channel, with helical blades on the outside and an inner drill bit at the end. An outer annular gap communicating with the cuttings guiding channel is provided inside the double-walled drill rod, and a sampling chamber is located inside the outer drill bit. During operation, the double-walled drill rod drives the outer drill bit to open and enlarge the hole, while the inner drill rod drives the inner drill bit to break the rock mass. The elastic body between the inner drill bit and the inner drill rod provides axial preload to enhance the rock-breaking effect. A mixed liquid is injected into the bottom of the hole through a liquid passage and a liquid storage chamber via a jet hole to prevent rock dust from freezing. High-pressure air enters the cuttings guiding channel through the outer annular gap, and combined with the helical blades, it achieves dual-drive upward return of rock cuttings, avoiding deposition and drill bit jamming. Simultaneously, precise sampling is achieved through the sampling chamber.

The application discloses an air film cooling structure of an aero-engine high-temperature hot end component, wherein the air film hole adopts an elliptical annular expansion slit air film hole, the elliptical annular slit hole comprises an inner ring side wall and an outer ring side wall, the long axis directions of the two are basically perpendicular to the main flow direction of the high-temperature gas main flow, the short axis directions of the two are basically parallel to the main flow direction of the high-temperature gas main flow, and a rib plate extending from an air inlet end to an air outlet end is arranged between the inner ring side wall and the outer ring side wall. The structure aims at the technical problem that the existing cylindrical air film hole is easy to form a kidney-shaped vortex at the outlet, thereby causing the cold gas to be lifted, the coverage area of the air film to be reduced and the cooling effect to be deteriorated, the elliptical annular expansion air film hole provided with the rib plate is used to construct opposite kidney-shaped vortices in the rotating direction on the wall surface of the hot end component to be cooled, so that the effect of the kidney-shaped vortex is inhibited, the purpose of enhancing the air film adhesion is achieved, and the structure is simple and has wide applicability.

This disclosure relates to the technical field of tar storage tank sludge removal. One embodiment of this disclosure provides a tar storage tank sludge removal device, which includes: a base box and an annular frame. The annular frame is disposed on the base box, a support is fixed on the base box, a collection component is disposed in the base box, and a sludge removal component is disposed on the annular frame. The sludge removal component includes an inner frame, which is fixed inside the annular frame. The annular frame is inserted into the support through the inner frame. An outer annular frame is slidably connected to the outside of the annular frame. Several fixing seats are fixedly connected to the outer frame by bolts. A scraper is disposed on the fixing seats. A drive motor is fixedly connected to the surface of the annular frame, and a drive wheel is disposed at the output end of the drive motor. A protrusion is disposed around the inner surface of the outer annular frame, and the drive wheel is in contact with the surface of the protrusion. Several outer frames are fixedly connected to the side surface of the annular frame. Through the above technical solution, the technical problems of poor scraping effect and inability to collect waste residue and wastewater in the prior art are solved.

The utility model discloses a kind of shaft seal rings with good sealing performance, relate to shaft seal ring field, including cover plate, the one side of cover plate is provided with pressing plate, shell is arranged between cover plate and pressing plate, two bearings are arranged in the shell, the bearing includes inner ring and outer ring, support ring is arranged between the outer ring, shaft body is rotatably installed between the inner ring, annular sealing element is arranged in the pressing plate, the vertical section of sealing element is U type, sealing element is abutted on the outside of shaft body. The utility model is provided with sealing element, since the sealing element of U type structure forms double-lip seal, the side close to shaft body is inner lip main seal, blocks medium leakage, the side away from shaft body is outer lip auxiliary seal, blocks outside pollutant from entering shell interior, suitable for bidirectional pressure working condition.

This utility model relates to the field of sensor technology, specifically to a ring-shaped force sensor. It includes a flat plate, a ring body, a cover plate, and a T-shaped force-applying component. The ring body comprises an outer ring body and an inner ring body, with a strain beam between them. An upper annular groove and a lower annular groove are formed between the strain beam and the inner wall of the outer ring body. A strain gauge is installed at the bottom of the upper annular groove. The T-shaped force-applying component is installed within the inner ring body. The cover plate is positioned above the ring body, with a through hole in its center allowing the inner ring body to pass through. The outer ring of the cover plate is connected to the outer ring body, and a mounting groove is formed on the outer surface of the upper end of the outer ring body. This utility model, by uniformly attaching the strain gauge to the strain beam of the ring structure, can directly capture the maximum strain signal, reduce signal attenuation, improve the measurement signal-to-noise ratio, and thus enhance accuracy. The cover plate, through the use of screws, baffles, and other structures, facilitates disassembly and installation, providing convenience for sensor calibration, fault repair, or component replacement.

Provided is a completion string and a multilateral well system. The completion string, in one aspect, includes a first tubing string, the first tubing string defining a first fluid path operable to receive a first fluid obtained from a first wellbore. The completion string, in accordance with this aspect, further includes a second tubing string positioned about the first tubing string, the first tubing string and the second tubing string creating an inner annulus that defines a second fluid path operable to receive a second fluid obtained from a second lateral wellbore. The completion string, in accordance with this aspect, further includes a third tubing string positioned about the second tubing string, the second tubing string and the third tubing string defining an outer annulus that defines a third fluid path operable to receive a third fluid obtained from a third lateral wellbore.

An electric motor (fig.1, 10) for an appliance (e.g. a vacuum cleaner) comprising a frame 52 having a plurality of diffuser vanes 56 and a stator assembly (fig.1, 18) having a plurality of winding portions 34 wherein the winding portions are at least partially disposed between adjacent diffuser vanes. This solution allows for larger stator assemblies to be provided without increasing the size of the frame and / or can can facilitate cooling of the stator coils. Some adjacent diffuser vanes may comprise no windings between them. The diffuser vanes may extend between inner and outer annular wallsof the frame. The windings may extend through a recess in the annular inner wall. [Figure 4B]

This invention provides an integrated connection structure for a tunnel arch and sidewall, relating to the field of tunnel construction technology. It includes a plug rod with a pointed, conical front end and an anchor head at the rear end. The plug rod is inserted into an installation hole located between the arch and the sidewall. The installation hole has an inner annular groove, a middle annular groove, and an outer annular groove formed sequentially along the axial direction. The anchor head has a first deformation portion that deforms after insertion into the installation hole to achieve a locking fit with the inner annular groove. The middle part of the plug rod has a second deformation portion that deforms after insertion into the installation hole to engage with the middle annular groove. The front part of the plug rod has a third deformation portion that deforms after insertion into the installation hole to engage with the outer annular groove. After the plug rod is inserted into the installation hole, the capsule structure is punctured, allowing colloidal material to enter the inner, middle, and outer annular grooves. This invention enables the arch and sidewall to form a stable and reliable integrated structure after assembly, and possesses good construction adaptability.