123 results about "FLANGE CAP" patented technology

The utility model relates to the technical field of machining, in particular to a high-precision rotatable auxiliary supporting device which comprises a rotating center frame body, a rotating body arranged on one side of the rotating center frame body, four adjusting cavities arranged on the rotating body and clamping contacts arranged in the adjusting cavities in a sliding fit mode. The clamping contact comprises a flange cover arranged on the outer wall of the rotating body, a lead screw rotationally connected with the flange cover through a bearing, a nut and a threaded sleeve which are in threaded fit with the lead screw, a sliding sleeve connected with one end of the threaded sleeve, an ejector head arranged at one end of the sliding sleeve and located at one end of the lead screw, and a limiting open groove formed in the outer wall of the sliding sleeve. The locking mechanism is in threaded fit with one side of the rotating body and is in sliding fit with the limiting open slot; according to the device, the swing of the workpiece during supporting is reduced, the machining precision and the qualified rate are improved, the vibration problem in the high-precision machining process of the deep hole drilling and boring machine is solved, the machining precision of the whole machine is guaranteed, the industry development is promoted, and the machining efficiency and the product quality are improved.

The application provides a device and method for improving the filling density of solid working substance, which comprises a storage cavity for containing the solid working substance, wherein the storage cavity comprises a first opening; a flange plate fixed to the storage cavity, wherein the flange plate comprises a second opening corresponding to the first opening; a flange cover detachably fixed to the flange plate, wherein the flange cover covers the second opening and forms a sealed cavity together with the flange plate and the storage cavity; an air inlet valve and an air outlet valve fixed to the flange cover and communicating with the sealed cavity; and a vibration table for vibrating the storage cavity. According to the above, the application provides a technical solution, wherein the storage cavity is vibrated by the vibration table, so that the solid working substance contained in the storage cavity can be broken, and the filling density of the solid working substance can be rapidly improved.

The invention relates to the technical field of screw compressors, in particular to a high-internal-pressure-ratio casing structure of a screw compressor, which can measure a gap of a rotor at a discharge port under the condition that internal and external high pressure ratios are matched, and comprises a compressor casing, a rotor cavity is arranged in the compressor casing, a female rotor and a male rotor are arranged in the rotor cavity, and the female rotor and the male rotor are arranged in the compressor casing. The compressor is characterized in that an integrally-formed platform is arranged above the discharge port of the compressor shell, a through hole is formed in the platform, a flange cover with a shaft for sealing the through hole is arranged on the platform, the shaft of the flange cover with the shaft extends into the through hole, and the end of the shaft of the flange cover with the shaft is a curved surface matched with the inner wall of the rotor cavity. And an O-shaped ring is arranged between the flange cover with the shaft and the platform.

The utility model relates to the technical field of biomass boiler slag coolers, and discloses a blockage clearing device of a biomass boiler slag cooler, which comprises a slag cooler charging barrel end plate, a blockage clearing mechanism is arranged in an inner cavity of the slag cooler charging barrel end plate, the blockage clearing mechanism comprises a flange seat and a flange cover, one side of the flange seat is fixedly provided with a fixing seat, and the other side of the flange seat is fixedly provided with a baffle. A threaded hole is formed in an inner cavity of the flange base, and a positioning ring is fixedly installed on one side of the flange cover. The blockage clearing mechanism is arranged on the original end plate of the material barrel of the slag cooler, the fixed seat is welded in the inner cavity of the end plate of the material barrel of the slag cooler, the flange cover and the flange seat are connected through the connecting bolt, refractory castable has good heat resistance, foreign matters in the slag cooler are manually taken out after the flange cover is detached, and the blockage clearing mechanism is convenient to use. Foreign matters such as iron wires in the slag are prevented from blocking the slag spraying holes, and the feeding system device of the slag cooler does not need to be disassembled, so that a large amount of manpower and time are saved.

The application discloses an adaptive ball head entering device, which comprises a base, a three-dimensional force sensor installed on the base, a bearing seat installed above the three-dimensional force sensor, a flange cover installed above the bearing seat, a locking cover installed above the flange cover, a ball head seat installed in the flange cover, the ball head seat being located above the bearing seat and a tapered roller bearing being arranged between the ball head seat and the bearing seat, a first central through hole being arranged on the ball head seat, an adaptive positioning section being arranged at the upper end of the first central through hole, and an inner conical surface being arranged on the inner wall of the adaptive positioning section; a second central through hole for the ball head to enter and exit is arranged in the flange cover, a third central through hole for the ball head to pass through is arranged on the locking cover; a control mechanism for controlling the ball head is arranged on the flange cover; the control mechanism comprises a locking through hole arranged in the side wall of the second central through hole, a locking pin installed in the locking through hole and a control driving mechanism for driving the locking pin to move along the locking through hole between a free station, an anti-escape station and a locking station.

This utility model relates to the field of flipping tooling technology, specifically to a rapid flipping device for flange covers. The flipping platform of this utility model is disc-shaped, its size matching the flange cover size. A rubber pad is provided on its surface, and flipping shafts that cooperate with the flipping mechanism are provided on both sides. A hinge seat that cooperates with the drive mechanism is provided on one side of its bottom, and an arc-shaped baffle is provided at the front edge of the flipping platform corresponding to the hinge seat. The flipping mechanism includes two hinged supports, and the support mechanism includes a rear baffle support column. The drive mechanism includes a hydraulic jack, and the buffer mechanism includes a disc-shaped flipping buffer pad. The hydraulic jack enables slow, unidirectional flipping, ensuring the flange cover lands smoothly and preventing damage to the sealing strips. Simultaneously, the rear baffle support column and baffle prevent accidental impact or excessively rapid sliding, and the rubber pad and buffer pad effectively absorb impact, improving operational safety. The device has a simple structure and low manufacturing cost.

The flange cover (1) has thimble-shaped fastening elements (3) that are integrally formed with a cover element (2) and extend transversely thereto to engage in respective through-holes (16) of a flange (14). At least one fastening element (3) has a lateral cam (6) in a section (4) adjacent to its distal end (5), which engages the respective through-hole (16) of the flange (14) in a form-fit and / or force-fit manner, wherein the width (18) of the section (4) with the cam (6) is less than or equal to the diameter (19) of the through-hole (16).

The invention relates to the technical field of water meter equipment, in particular to a metering mechanism of a horizontal helical vane type water meter, which comprises a flange cover, a bracket, an impeller, a rectifier, a central gear, a transmission gear set and a baffle plate, and a rotating shaft of the impeller is rotatably supported between the rectifier and the baffle plate. The first gear and the second gear are meshed with each other to form the first gear pair used for converting rotary motion of the impeller into rotary motion of the transmission gear shaft, the first gear pair can be effectively meshed under any working condition due to the fact that the first gear and the second gear are both involute cylindrical gears, and even if the impeller axially moves by 5 mm to the maximum, the first gear pair can be effectively meshed with the second gear pair. Due to the characteristics of the cylindrical gears, meshing of the cylindrical gears cannot be separated, only slight relative sliding in the tooth width direction exists, influences on transmission stability and efficiency are extremely small, the contact area of the cylindrical gears is far smaller than the sliding contact area between the worm gear and the worm, and friction resistance of the cylindrical gears can be remarkably reduced.

The utility model provides a detachable square tube box pressing device, which adopts an inner and outer double-module mechanical sealing structure and comprises an inner force bearing module, an outer force bearing module, an outer force bearing module, an inner force bearing module, an outer force bearing module, an inner force bearing module and an outer force bearing module, and is characterized in that the inner force bearing module is an adjustable I-shaped steel cross arm provided with a telescopic mechanism used for adapting to square tube boxes with different widths; the dynamic sealing module comprises a sealing plate, a pull rod group and a quick-release flange assembly; the sealing plate and the flange cover are provided with pressure test interfaces which are used for connecting a pressure source and pressure detection equipment. The hydraulic telescopic arm has the advantages that the hydraulic telescopic arm structure of the adjustable I-shaped steel cross arm can quickly adapt to square tube boxes of different width specifications, and the traditional blind plate welding procedure is thoroughly eliminated; through the pull rod group and the quick-release flange assembly of the dynamic sealing module, the test device can be quickly mounted and dismounted.

The utility model relates to sulfur recovery equipment technical field, specifically a spring formula sulfur seal device, including inner cylinder, the inner cylinder is connected liquid sulfur entrance inner connector and liquid sulfur export inner connector respectively, the inner cylinder inside is provided with the plunger, and the inner cylinder inside fixedly connected with plunger seat, plunger seat sets up in the lower part of plunger, and the plunger blocks liquid sulfur export inner connector, and the inner cylinder top sets up cylinder top flange cover, and the cylinder top flange cover slidingly connects with the limiting rod, and the limiting rod penetrates cylinder top flange cover and extends into the inside of inner cylinder, the limiting rod is connected with plunger, and the spring is movably sleeved outside the limiting rod. In the utility model, when the plunger lower part cavity pressure increases, the plunger and spring, limiting rod etc. move upward under the action of pressure, when the spring moves to the inner cylinder top, the plunger extrudes the spring, when reaches certain setting pressure value, the plunger bottom is higher than liquid sulfur export inner connector, makes liquid sulfur flow.

The utility model provides a kind of planetary gear reduction motor, including motor, still including the reduction component being connected with motor;Motor shaft of motor is processed with sun gear, planetary carrier is rotatably connected with planetary gear, and planetary gear is engagedly connected with sun gear and gear ring;First ladder is provided on the outer wall of planetary carrier, first bearing is installed at first ladder, first recess is opened in the inner wall of output flange cover, the inner wall of gear ring is provided with second recess, after output flange cover is connected with gear ring, first bearing is located in first installation groove.The utility model in the present application cancels the radial force received by planetary gear by first bearing, effectively avoids that planetary gear bears additional radial load.Through the radial force risk of offsetting planetary gear, the vibration and noise caused by uneven stress can be greatly reduced, the overall reliability of the system is effectively improved, and the failure probability caused by component wear is reduced.

This invention provides a flat gate valve and its usage method, relating to the field of natural gas development technology. The valve includes a valve body, a valve cover, and a tail cover, all three having a longitudinal cavity at their center. The valve body has inlet and outlet ends on both sides, forming a flow channel. A flange cover is located above the valve cover, housing a valve stem and a valve plate connected within it. A large handwheel extends from the top of the valve stem to the outside of the flange cover, driving the valve plate to open and close. A valve stem cover and a ball screw cover are located inside the flange cover. The valve stem cover and the ball screw cover are fixedly connected and rotatable. A nut is fixed inside the ball screw cover, and a ball screw is fitted inside the nut. A retaining ring is connected to the top of the ball screw, matching the inner diameter of the ball screw cover. The large handwheel drives the ball screw cover to rotate, thereby causing the nut to move up and down. The valve stem is connected to the bottom of the ball screw via a pin, achieving precise adjustment and opening / closing of the valve. This invention has good operability and spatial adaptability, while also facilitating the user's observation of the opening / closing position.

The application relates to a cast shell type EGR cooler which comprises an air inlet joint connected with an elastic structure with a bellows and a sleeve, the outer periphery of the elastic structure is fixedly connected with an input end flange cover, the input end flange cover is bolt-connected with one end of a cast pipe shell through an input end sealing gasket, the other end of the pipe shell is bolt-connected with a fixed structure and an output end flange cover with an output pipe joint through an output end sealing ring; the elastic structure is welded with a tube plate at one end of a tube bundle, and the other end of the tube bundle is welded with the fixed structure. One end of the tube bundle is provided with the fixed structure, and the other end is provided with the elastic structure, so that the dislocation between the pipe shell and the tube bundle due to thermal expansion and cold shrinkage is solved; the flexible structure of the double-layer bellows is used for compensating the axial displacement of a heat exchange core, the influence of thermal expansion and cold shrinkage on the heat exchange core is reduced, the double-layer bellows is placed at the air inlet end, the water inlet structure of the shell is combined, the water flow space is increased, and the uniformity of water flow is ensured.

The utility model discloses a sensor structure of a micro-small-caliber electromagnetic flowmeter, which relates to the technical field of electromagnetic flowmeter sensors and comprises a mold core, an inner shell is slidably clamped on the outer surface of the middle of the mold core, and two symmetrically distributed finished coils are arranged on each of the upper side and the lower side of the inner shell. Magnetic cores are installed in the middles of the two finished coils, magnetic pole heads are slidably clamped in the middles of the two magnetic cores, flat-head set screws are installed in the middles of the two magnetic cores in a threaded mode, and one ends of the two flat-head set screws make contact with one ends of the magnetic pole heads; the flange cover of the external interface assembly can be screwed through the third bolt to press the sealing surfaces on the two sides of the end face of the mold core, so that internal liquid cannot leak, meanwhile, external liquid cannot immerse into the meter body, the sensor changes an original lining process mode, a high-cost mold extrusion mode is abandoned, and the production cost is reduced. The manufacturing cost is reduced, and the manufacturing efficiency is improved.

The utility model discloses a line sealing stop valve relates to the field of stop valve. This line sealing stop valve includes valve body, sealing flange and valve stem spare, and sealing flange sets up at the top of valve body, and valve stem spare penetrates sealing flange and is connected with valve body, and sealing flange includes first sealing flange, flange cover and second sealing ring, and first sealing flane top is provided with second circular slot, and second sealing ring sets up in second circular slot, and first sealing flange outside is provided with thread, and flange cover inside is provided with second thread sleeve, and first sealing flange and flange cover are connected through thread and second thread sleeve screw thread. The sealing design of valve rod connection place changes from waterproof filler to sealing ring design, and the detachable flange cover is set, and the first flange is connected through the flange cover screw thread, and the second sealing ring is fixed in the second circular slot, so that the second sealing ring is closely connected with the valve rod, and the purpose of placing leakage is achieved.

The invention discloses a high-temperature gas cooled reactor control rod drive wire test device and a test method, the test device comprises a vertically arranged pressure-bearing container formed by connecting a plurality of pressure-bearing cylinders, the test device also comprises a deformation control device, the pressure-bearing container is a multi-degree-of-freedom pressure-bearing container, the top of the multi-degree-of-freedom pressure-bearing container is connected with a foundation through a mounting flange, and the deformation control device is connected with the deformation control device. A sealing flange cover is installed at the bottom of the multi-degree-of-freedom pressure-bearing container, the multi-degree-of-freedom pressure-bearing container is provided with a deformation unit, the deformation unit comprises a pressure-bearing barrel and an expansion joint installed on the pressure-bearing barrel, and the deformation control device is connected with the pressure-bearing barrel in the deformation unit and controls displacement of the pressure-bearing barrel. According to the invention, the expansion joint is adopted to enable the pressure-bearing container to generate controllable and settable deformation, and after installation, deformation units and deformation control devices arranged at different positions can generate various forms of deformation, so that more accurate control rod operation drive line simulation can be provided; and the control rod falling time and the performance life of the control rod drive wire can be conveniently researched.

The utility model discloses a tubular washing liquor distributor device special for an aluminum oxide filter. The tubular washing liquor distributor device comprises a bracket and a main pipe, the main pipe is connected with the support, flange covers are installed at the two ends of the main pipe, the flange covers are fixedly connected with the main pipe through flange fasteners, a water inlet is formed in the top of the main pipe, a plurality of branch pipes are arranged at the bottom of the main pipe, the bottom of each branch pipe is connected with a nozzle body, and the nozzle bodies are connected with the branch pipes through hoop structures. An opening is formed in the pipe wall of the nozzle body, an adjusting piston is arranged at the bottom of the nozzle body, and the adjusting piston is detachably connected with the nozzle body through threads. According to the utility model, the problems of small washing water amount and uniform washing water spraying required by small and medium-sized aluminum oxide filters can be effectively solved.

The application discloses an experimental testing device and a testing method suitable for high-temperature lead-bismuth erosion, and belongs to the technical field of nuclear energy experimental testing devices. The device comprises a variable frequency motor, a motor support, a main shaft, a stuffing box, a shaft seat, a flange cover, a tank body, a mounting base, a test piece disc and a medium rotation prevention device. The output shaft of the variable frequency motor penetrates through the top cover of the motor support, the upper end of the main shaft is connected with the output shaft of the variable frequency motor through an elastic column pin coupling, and the stuffing box and the shaft seat are sleeved on the outside of the main shaft. The lower part of the motor support is detachably connected with the shaft seat, the shaft seat is detachably connected with the top of the flange cover, the flange cover is detachably connected with the top of the tank body, and the tank body is welded on the mounting base. The lower end of the main shaft extends into the tank body, and three test piece discs are arranged at equal intervals in the tank body, and test pieces are detachably installed on the test piece discs. The medium rotation prevention device is embedded in the tank body. The top edge of the tank body is connected with a protective gas inlet and a protective gas outlet, and the bottom is provided with a lead-bismuth medium inlet and outlet.

A fixing device for transportation of large heavy-load equipment is characterized in that a transportation bracket is detachably installed on a transportation vehicle plate through a plurality of fixing mechanisms, each fixing mechanism comprises a supporting rod, a sleeve and a pull claw assembly, the supporting rods are fixedly arranged on the vehicle plate, the sleeves are connected with the bottom of the bracket through flange covers, the front ends of blind rivets are provided with four pull claws capable of being opened and closed in the radial direction, and the rear ends of the blind rivets are connected with piston rods; and a hole is formed in the upper part of the sleeve and is communicated with an external pressure source. According to the fixing device for transportation of the large-scale heavy-load equipment, the pulling claws are driven by hydraulic oil to clamp the supporting rods, and the loading and unloading efficiency is improved; by arranging the disc spring set, the stability in the transportation process is improved; and through the arrangement of the inner positioning sleeve and the outer positioning sleeve, the installation accuracy and convenience are improved.

The utility model relates to quick -opening blind plate device technical field, concretely is a new quick -opening blind plate, including quick -opening blind plate device main part, through in quick -opening blind plate device main part carries out the use, its sealed inner chamber sets up the mounting groove to the interval baffle and installs, carries out the butt joint to inside interval baffle no.

The manhole structure comprises a manhole main body part and a flange cover, the manhole main body part comprises a manhole shell ring and a flange, a first heat insulation lining is arranged on the inner side of the manhole main body part, a second heat insulation lining is arranged on the inner side of the flange cover, and the manhole shell ring and the flange cover are arranged in the manhole shell ring. A butt joint is formed between the first heat insulation lining and the second heat insulation lining, a first edge strip is welded to the butt joint of the flange, first ceramic fiber paper is arranged between the first edge strip and the first heat insulation lining, and a second edge strip is welded to the butt joint of the flange cover. Second ceramic fiber paper is arranged between the second edge strip and the second heat insulation lining, a ceramic fiber felt is arranged between the first edge strip and the second edge strip, the first edge strip and the second edge strip are the same in structure and are both arranged in a conical ring shape, and thermal expansion grooves are formed in the first edge strip and the second edge strip from the inner side edge to the outer side edge of the conical ring shape; the thermal expansion groove is filled with the ceramic fiber felt after the ceramic fiber felt is installed and compressed, so that thermal expansion can be dealt with.

The main steam valve of the supercritical steam turbine comprises a valve shell, an inner valve cover is arranged in the valve shell (1), an inner hole of the valve shell (1) is further provided with a whole circle of threads for installation, the main steam valve further comprises a threaded ring (3), and the threaded ring is connected into the valve shell through the threads and axially fixes the inner valve cover and a sealing ring; a temperature measuring hole is formed in the outer circle of the valve shell and used for measuring the temperature of an inner cavity of the valve shell. A valve shell flange cover (2) is arranged on the upper end face of the valve shell and fixed to the end face of the valve shell through bolts. A valve core (9) is arranged at the right end of the inner valve cover and is fixed on the inner valve cover (4) through a positioning pin (13); a valve rod and a valve element connected with the valve rod are arranged in the inner valve cover, and a lining-shaped sealing ring is arranged between the valve rod and the valve element connected with the valve rod and between the valve rod and the inner valve cover. The contact faces of the valve element (9) and the valve seat are made of PVD tungsten metal or alloy coatings.

This invention relates to the field of nuclear fusion and discloses a dismantling device and method for a maintenance window of a fusion device. The dismantling device includes a first lifting mechanism, a second lifting mechanism, and a moving vehicle. The first lifting mechanism includes a ring rail, a guide rail, pulleys, a pulley adjusting component, and a lifting component. The ring rail is mounted on a Dewar base, the guide rail is located outside the ring rail and extends radially along the ring rail, the pulleys are slidably engaged with the guide rail, the pulley adjusting component is located on the guide rail, and the lifting component includes a drive unit and a first traction rope. The second lifting mechanism is located within the maintenance passage and includes a releasable or retractable second traction rope. The moving vehicle is located within the maintenance passage. This dismantling device for a fusion device can precisely control the removal of the maintenance window within a narrow maintenance passage, avoiding collisions between the flange cover and other components, and improving the safety and reliability of the maintenance window dismantling.

The utility model relates to the technical field of sulphur recovery equipment, specifically a floating ball type sulphur sealing device, including inner cylinder, the inner cylinder top part sets up cylinder top flange cover, the inner cylinder bottom part sets up cylinder bottom flange cover, the inner cylinder connects liquid sulphur inlet inner connector and liquid sulphur outlet inner connector respectively, the liquid sulphur outlet inner connector extends into the inside of inner cylinder, the liquid sulphur outlet inner connector extends into the inside of inner cylinder one end upper portion opening, and opening place fixedly connected with the communicating port, the communicating port is in communication with liquid sulphur outlet inner connector, the communicating port is slidably connected with the plunger, and the plunger can block the communicating port, and the top of plunger is fixedly connected with the floating ball. The utility model discloses a floating ball type sulphur sealing device simple structure, through the floating ball drive plunger isolation process gas into liquid sulphur storage facility, and ensure that the liquid sulphur generated flows into the storage facility, eliminates the hidden danger of safety while saving the investment, and is more favorable to the maintenance of equipment.

The utility model discloses a novel pressing tool for a reaction kettle, which belongs to the technical field of pressure vessel manufacturing, and comprises a flange cover and an embedded body, and the embedded body is fixedly connected with the inner end face of the flange cover; an annular sealing groove is machined in the outer side wall of the embedded body, and a sealing element is installed in the sealing groove. The flange cover is provided with a pressing channel, an opening in one end of the pressing channel is formed in the inner end face of the flange cover, and the other end of the pressing channel is provided with a pressing connecting pipe used for being externally connected with a pressing system. During use, the flange cover is connected with the connecting flange, the embedded body extends into the connector pipe, a closed pressing cavity is formed between the embedded body and the connector pipe, and the pressing cavity is communicated with the pressing channel. On the premise that the overall strength of the reaction kettle is not affected, local pressure testing after repair of a welding seam or a sealing face of the connector pipe is achieved, the workload can be reduced, damage to the reaction kettle is reduced, and the manufacturing efficiency is improved.

This invention belongs to the field of titanium sublimators, specifically a ceramic-sealed electrode structure for titanium sublimators. It includes a guide tube, a sealing flange, a cap, three conductive electrodes made of titanium-molybdenum wires, and a common electrode. The three conductive electrodes and the common electrode are arranged circumferentially along the cap and fixedly connected to it. The cap is fixed inside the sealing flange, and the guide tube is fixed to one side of the sealing flange. The conductive electrodes of the titanium-molybdenum wires include a titanium wire support rod, an upper cap, a ceramic tube, and a lower cap. The ceramic tube is connected to the upper and lower caps on both sides, respectively. The lower cap is fixed inside the cap. The titanium wire support rod passes through the upper cap, the ceramic tube, and the lower cap, and is fixedly connected to the upper cap. The common electrode includes a ground cap and a ground support rod. The ground cap is fixed inside the cap, and the ground support rod passes through the ground cap and is fixedly connected to it. This invention can prevent deformation of the ground support rod and titanium wire support rod caused by the heating of the titanium-molybdenum wires, avoiding poor contact with the power cable due to deformation of the titanium sublimator connector.

According to the small oil-gas separation equipment, an inner cylinder, a spiral mounting groove and a guide spiral blade are arranged, after a flange cover is taken down, the inner cylinder and the guide spiral blade can be separated, when the inner wall of the inner cylinder is damaged, the inner cylinder or the guide spiral blade can be damaged, and the problem that an existing tank body and a spiral blade are integrally connected, so that the service life of the tank body is prolonged is solved. The oil-gas separation efficiency cannot be reduced, and the overall use efficiency of the separator is also improved only by replacing the inner barrel and the guide spiral blade; furthermore, a bearing channel, a first positioning groove and a positioning strip are arranged, it is ensured that the oil-gas mixture introduced by the tangential feeding channel can enter the separation space, stable feeding is achieved, and the situation that the bearing channel and the tangential feeding channel are staggered is avoided.

The oil tank truck comprises a chassis and an oil tank arranged on the chassis, a hoop type manhole cover base is fixedly arranged on the top of the oil tank, the hoop type manhole cover is movably arranged on the upper portion of the hoop type manhole cover base, and the hoop type manhole cover is arranged on the upper portion of the hoop type manhole cover base. A hoop with an opening is arranged on the periphery of the joint of the hoop type manhole cover and the hoop type manhole cover base in a hooping mode, a locking device used for locking the hoop is arranged at the opening of the hoop, and a manhole large cover of the hoop type manhole cover is provided with a sealing piece used for shielding flange covers arranged on the manhole large cover. The hoop type manhole cover has the advantages that the locking device is additionally arranged on the hoop, so that the whole hoop type manhole cover is prevented from being directly opened by detaching a bolt on the hoop; the corresponding sealing pieces are additionally arranged outside the flange covers on the large manhole cover, so that the flange covers can be prevented from being directly opened by detaching bolts on the flange covers; and the risk that the oil tank truck is stolen can be avoided.

The utility model discloses a steam header for a multi-stage energy-saving steam system, which comprises a body, an air inlet and a sealing cover are respectively arranged on two sides of the body, an air outlet with the caliber decreasing in sequence is arranged at the top of the body from the air inlet to the sealing cover, a water outlet pipe is arranged at the bottom of the body close to the sealing cover, and a water inlet pipe is arranged at the bottom of the body. A flange cover is arranged on the water outlet pipe, a drainage pipe is arranged on one side of the water outlet pipe, and a filter screen, a steam trap and a liquid pump are sequentially arranged on the drainage pipe. The steam distribution device is simple in structure, utilizes one header to replace a plurality of steam boxes to respectively distribute steam to different pipelines, and is good in using effect.

The invention provides a pin wheel housing, planet carrier and bearing integrated cycloidal reducer joint module which comprises an input shaft, a cycloidal reducer assembly, a motor, an encoder and a driver, the cycloidal reducer assembly comprises a pin wheel housing, a cycloidal gear and a planet carrier, the cycloidal gear and the planet carrier are arranged in the pin wheel housing, and a rolling body is arranged between the pin wheel housing and the planet carrier. One end of the planet carrier is fixedly connected with a flange cover plate capable of supporting a pin shaft of the planet carrier, the flange cover plate and the pin shaft are fixed in an adhesive mode, screws are reduced, a roller path on an outer ring of a bearing and a pin wheel housing are arranged to be an integrated component, rolling constraint can be provided for a rolling body, meanwhile, axial limiting structures such as a check ring and a gasket are reduced, and the service life of the rolling body is prolonged. The axial size of the speed reducer is reduced, the whole parts are fewer, the weight is lighter, and the rigidity is higher.