236 results about "Ductile iron pipe" patented technology

The invention discloses a nodular cast iron pipe continuous annealing furnace temperature distribution optimization control system and method, and belongs to the technical field of temperature control, and the system comprises a temperature detection module, a data processing module, a control module and a fault diagnosis module; the temperature detection module is used for collecting temperature data in the nodular cast iron pipe annealing furnace in real time; the data processing module is used for preprocessing and analyzing the collected temperature data and constructing a temperature distribution model; the control module comprises a temperature optimization unit and an energy optimization unit; the temperature optimization unit is used for calculating the temperature adjustment amount according to the real-time temperature distribution condition in the furnace in the length direction, the radial direction and the circumferential direction, and formulating a partition heating and local compensation strategy; the energy optimization unit is used for dynamically adjusting the heating power according to the change of the production takt, and generating a dynamic heating strategy; the fault diagnosis module is used for monitoring the operation state of the nodular cast iron pipe annealing furnace in real time and conducting fault detection.

The invention belongs to the field of application of an image processing technology and an automatic detection technology, provides a nodular cast iron pipe white sprayed code integrity detection method and system, and aims to solve the problems of low nodular cast iron pipe white sprayed code recognition accuracy, poor environmental adaptability, low processing speed, image splicing and the like in industrial production. In combination with an optimized image preprocessing technology, an advanced feature point detection and matching technology and an image fusion algorithm are applied to solve the problem of image seamless splicing. By adopting the method provided by the invention, the error and time cost in a manual identification process can be greatly reduced through prediction, and the automation and intelligence level of a production line is improved. The production efficiency can be improved, the product quality can be ensured, and the increasing industrial automation requirement is met. Finally, the system becomes an important tool for improving the product quality and the production efficiency of nodular cast iron pipe production enterprises.

The application discloses a nodular cast iron pipe with a composite coating and belongs to the technical field of metal corrosion prevention, comprising a nodular cast iron pipe base body, a composite outer coating coated on the outer surface of the nodular cast iron pipe base body and an inner coating closely attached to the inner surface of the nodular cast iron pipe base body, characterized in that the composite outer coating comprises an alkali-activated gel layer and a zinc-based coating, the zinc-based coating is arranged between the outer surface of the nodular cast iron pipe base body and the alkali-activated gel layer, the alkali-activated gel layer is an alkali-activated slag fly ash corrosion-resistant gel material, and the zinc-based coating is one or more of a pure zinc coating, a zinc-aluminum alloy coating or a zinc-rich coating layer. The alkali-activated gel layer provided by the application is coated on the inner or outer surface of the pipe and provides further corrosion protection for the nodular cast iron pipe, so that the pipe can be used in extremely harsh construction environments, and has extremely strong weather resistance in acidic soil and overhead fields.

The present invention discloses a flaw detection device and method based on the production of ductile iron pipes, and relates to the technical field of ductile iron pipe detection. The present invention includes a ductile iron pipe arranged on a detection platform, and also includes: a positioning unit, which is arranged on a processing box 1 and includes a driving component and a positioning component; a flaw detection unit, which is arranged on the detection platform and includes a synchronization component and a detection component, and a processing box 1 and a processing box 2 are arranged on the detection platform. The advantage is that the present invention can realize synchronous visual flaw detection of the inner and outer walls of the ductile iron pipe without changing the positioning state of the ductile iron pipe, and can realize comprehensive detection of the inner and outer walls of the ductile iron pipe. At the same time as the visual detection, the collision knocking rod can be driven to intermittently automatically knock on the ductile iron pipe to generate vibration waves. At the same time, the ripple detector can be used to realize the collection and detection of the vibration waves, so that the internal flaw detection of the ductile iron pipe can be realized, and the detection range is wider.

The utility model relates to a butt joint installation device for nodular cast iron pipes, one end of each nodular cast iron pipe is fixedly provided with a horn mouth, and the butt joint installation device comprises a fixing assembly which is of a closed annular structure, is installed on the nodular cast iron pipes in a buckled mode and is suitable for fixing the nodular cast iron pipes; the supporting assembly is located on one side of the horn mouth of the nodular cast iron pipe and suitable for bearing the adjacent nodular cast iron pipes for butt joint installation; the telescopic part is mounted between the fixing assembly and the supporting assembly and suitable for adjusting the distance between the fixing assembly and the supporting assembly. The butt-joint installation device comprises a fixing assembly, a supporting assembly and a telescopic piece, the fixing assembly sleeves one end of the nodular cast iron pipe and is suitable for fixing the nodular cast iron pipe, the supporting assembly is located at the other end of the nodular cast iron pipe, and the top end face of the supporting assembly is flush with the inner wall of the horn mouth and is suitable for bearing the adjacent nodular cast iron pipes for butt-joint installation. Alignment is fast, installation is convenient, and firmness and stability are achieved; and the device is suitable for nodular cast iron pipes of various sizes and wide in application range.

The utility model belongs to the field of municipal engineering, and provides a pipeline socket and spigot joint reinforcing and protecting device which comprises two deflection protecting pieces. Each deflection protecting piece comprises a front extending part, a protruding part and a rear extending part which are sequentially connected. The two deflection protection pieces are symmetrically arranged and jointly form a sleeve structure, and the sleeve structure is coaxially arranged on the outer side of a pipeline socket and spigot joint in a sleeving mode. When the device is used, the water leakage point of the pipeline is determined firstly, then a working face meeting the installation requirement of the device is excavated at a connector, after the pipeline is corrected in place, the device is installed at the position of the connector, then a pipe bottom foundation is filled, and soil covering on the pipe side and the pipe top is completed. The device can reinforce and protect the deformed and fractured nodular cast iron pipe joint under the condition of not stopping the normal operation of the pipe network, can realize quick repair, reduce the excavation workload of a foundation pit, reduce the social influence caused by the stop operation of the pipe network and reduce the adverse influence on the environment, is simple and feasible, and can ensure the quality.

The invention relates to the technical field of pipeline installation, and discloses a nodular cast iron pipe rapid installation hydraulic trolley and a construction method.The nodular cast iron pipe rapid installation hydraulic trolley comprises an installation frame, a connecting rod is rotationally connected to the interior of the installation frame, rollers are fixedly connected to the outer wall of the connecting rod, and a first telescopic rod is fixedly connected to the outer wall of the left side of the installation frame; an anti-skid assembly is fixedly connected to the outer wall of the right side of the first telescopic rod, a supporting assembly is fixedly connected to the upper surface of the anti-skid assembly, a pushing assembly is fixedly connected to the outer wall of the supporting assembly, an expanding assembly is fixedly connected to the outer wall of the pushing assembly, and fixing assemblies are fixedly connected to the outer walls of the two sides of the mounting frame. The hydraulic cylinder and the telescopic rod cooperate to push the expanding assembly to enter the pipeline, the motor is combined to drive a meshing mechanism of a fluted disc and a sliding block, the inner wall of the pipeline is evenly expanded and positioned by the mounting pad, the trolley flexibly moves along the axis of the pipeline through the rollers and the universal wheels, the manual adjusting time is effectively shortened, and the mounting error is reduced.

The utility model discloses a semi-X-shaped rubber ring sealing structure of a nodular cast iron pipe, and relates to the technical field of socket fit sealing of nodular cast iron pipes. The sealing ring comprises an integrally-formed semi-X-shaped rubber ring, one end of the periphery of the rubber ring is provided with a protruding annular positioning clamping block, the other end of the periphery of the rubber ring is provided with a first sealing part, and a straight part is arranged between the first sealing part and the positioning clamping block; the end, close to the positioning clamping block, of the inner circumference of the rubber ring is an inclined part, an extrusion part is arranged in the middle of the inner circumference, and the vertical distance from the inner circumference of the rubber ring to the straight part is gradually increased from the end where the positioning clamping block is located to the extrusion part. A second sealing part is arranged at one end, far away from the positioning fixture block, of the inner circumference of the rubber ring, one side of the section of the second sealing part and the first sealing part is arc-shaped, and arc-shaped grooves are formed between the second sealing part and the first sealing part and between the second sealing part and the extrusion part respectively; the nodular cast iron pipeline is reasonable in section appearance design, the sealing reliability of the nodular cast iron pipeline in certain high-pressure, high-temperature and dynamic environments is improved, and the requirement for high-temperature hot water conveying in the heating industry can be met.

The application relates to the technical field of nodular column iron pipe processing, and discloses a self-anchored pipe socket welding ring welding device based on construction and an operation method thereof, which comprises a push plate, a self-anchored nodular cast iron pipe and a copper hoop, one end of the top of the push plate is fixedly connected with an electric telescopic table, the output end of the electric telescopic table is fixedly connected with a mounting frame, and the inner wall of the mounting frame is fixedly connected with a first motor. The welding gun arranged at the top of the assembling block reciprocatingly performs slow overlay welding between the two copper hoops under the slow rotation of the first motor, and the application further solves the problem that, in the use process of the traditional self-anchored pipe socket welding ring welding device, when special-sized pipelines are needed, the self-anchored nodular cast iron pipe often needs to be taken to a designated processing factory for processing, which is not only troublesome for the back-and-forth transportation, but also difficult to timely perform secondary processing on the pipe according to the construction demand, so that the pipeline throughness cannot be guaranteed.

The utility model relates to the technical field of lifting appliances, in particular to a lifting appliance for a nodular cast iron pipe, which comprises a lifting appliance rod, a mounting block b, a reinforcing component and a lifting component, a mounting block a is connected above the lifting appliance rod, two ends above the mounting block a are respectively connected with a splicing rod a, the splicing rod a is provided with a through hole a, the mounting block a and the inner walls of the two splicing rods a form a mounting cavity a, a connecting piece a is connected above the mounting cavity a, and the connecting piece a is connected with a lifting hook a and is used for being connected with lifting machine equipment; the mounting block b is connected below the lifting appliance rod; the mounting block b is connected with a splicing rod b, and the splicing rod b and the splicing rod a are the same in structure. According to the lifting appliance for the nodular cast iron pipe, a proper connecting position can be conveniently selected according to a nodular cast iron pipe body lifting point, the rationality of a lifting mode is improved, the safety and stability of nodular cast iron pipe body lifting operation are improved, deformation or damage of the nodular cast iron pipe in the lifting process is avoided, and the lifting cost and risk of the lifting appliance for the nodular cast iron pipe are reduced.

The invention discloses a pretreatment intelligent machining device for a nodular cast iron pipe inner wall spraying procedure, and relates to the technical field of nodular cast iron pipe inner wall machining and grinding devices. The pretreatment intelligent machining device for the nodular cast iron pipe inner wall spraying procedure comprises a base, the top of the base is fixedly connected with an adjusting supporting beam, the interior of the base is fixedly connected with a rotating fixing mechanism, the interior of the adjusting supporting beam is rotationally connected with a driving mechanism, and the driving mechanism comprises a first rotating lead screw. According to the pretreatment intelligent machining device for the nodular cast iron pipe inner wall spraying procedure, a first sliding block is arranged, and after a fourth motor is started, a conical push block pushes the first sliding block to move, so that the inner wall of a nodular cast iron pipe is conveniently and preliminarily ground by a spherical first grinding block; and large dynamic load fluctuation caused by unevenness of the inner wall during finish machining is avoided, so that the risks of vibration and deformation in the machining process are reduced, and the overall machining efficiency of the device is improved.

The utility model provides an automatic ladle slag removal device for nodular cast iron pipe production, and relates to the technical field of nodular cast iron pipe production, the automatic ladle slag removal device comprises a hoisting assembly and a bearing feeding and discharging component, the bearing feeding and discharging component assembled by bolts is arranged on the inner side of the lower portion of the hoisting assembly, and a cleaning mechanism is arranged at the output end of the inner side of the hoisting assembly. The feeding and discharging bearing part comprises an annular sleeve seat, a hinged movable strip, a ladle cylinder, an output nozzle, a hinged base, a pull rod, a hydraulic telescopic arm and an electric hinged seat; the annular sleeve seat is arranged on the inner side of the lower part of the hoisting assembly; according to the cleaning device, the first matching plate at the output end of the first hydraulic cylinder is mainly utilized to move into a ladle cylinder, and dirt which is difficult to scrape can be scraped through rotation of the rotating motor, the rotating sleeve, the servo motor, the vertical cleaning knife and the transverse cleaning knife; and an electromagnetic suction plate on one side of the second anastomosis plate can adsorb the cleaned iron dirt, so that the cleaning efficiency of the equipment is improved.

The invention discloses a large-deflection-angle ductile cast iron pipeline flexible connector which comprises a bearing head and a plug, the connector position of the bearing head is a spherical bell mouth, a spherical ring is installed in the spherical bell mouth, the plug is installed in the spherical ring and connected with the bearing head, and the spherical ring is matched with the spherical bell mouth at the joint of the plug and the bearing head. According to the T-shaped connector, the connector allowable deflection angle is increased, the insertion depth of the plug is increased through the spherical ring and the spherical bellmouth, the larger deflection angle and length compensation are achieved compared with a common T-shaped connector, and the occurrence of pipeline water leakage accidents caused by uneven settlement in mountainous regions, marshlands and earthquake-prone regions is avoided by increasing the deflection angle.

The utility model relates to the technical field of nodular cast iron pipe fittings, in particular to a sand cleaning device suitable for the surface of a nodular cast iron pipe fitting, which comprises a sand tank, a sand cleaning station arranged in the middle of the sand tank, preparation stations arranged on two sides of the sand cleaning station, and two groups of rotatable nodular cast iron pipe fitting rotating clamping tables, the two nodular cast iron pipe fitting rotating clamping tables can be horizontally moved as a whole and can be arranged at a sand cleaning station and one of the preparation stations correspondingly, and the upper portion of the sand cleaning station fixedly communicates with a sand cleaning box with inlets and outlets formed in the bottoms of the two sides; the nodular cast iron pipe fitting sand removing device is simple in structure, sand on the inner wall and the outer wall of a nodular cast iron pipe fitting can be conveniently and continuously removed, the sand removing energy consumption is reduced, the occupied area is reduced, the safety performance is further improved, and abrasion to the nodular cast iron pipe fitting is reduced.

The present invention discloses a control device for a metering ladle for hot-molding centrifugal casting of ductile iron pipes, which relates to the technical field of metering ladle control devices. The device comprises a base plate, four support blocks evenly mounted on the top of the base plate, a connecting rod mounted on the side of each two corresponding support blocks close to each other, a first weighing sensor mounted on the top of each of the two connecting rods, a second weighing sensor mounted on the top of each of the two support blocks, and a clamping block mounted on the top of each of the two second weighing sensors. In the present invention, when in use, a roller is placed on a rail scale, and a servo controller on the servo hydraulic cylinder activates the servo hydraulic cylinder, pulling the connecting plate, causing the clamping plate to pull the driving wheel to move, and the driving wheel moves to pull the chain. Under the cooperation of the first sprocket and the second sprocket, one end of the chain pulls the connecting base, and under the cooperation of the clamping block and the round rod, the molten iron ladle rotates around the round rod to pour out the molten iron.

The utility model provides a DN350-800 nodular cast iron pipe wall thickness multi-surface detection device, which comprises a tug device, one side of the tug device is provided with a thickness measuring device, the tug device comprises a rotating disc and a base, the rotating disc is rotatably connected with the base, the rotating disc controls a first motor to rotate through a controller, and meanwhile, the thickness measuring device is connected with the thickness measuring device. A weighing device and a pushing rod are arranged in the rotating disc, a cast pipe is lifted and weighed, the thickness measuring device comprises a fixed rod and a movable rod, and a first laser displacement sensor arranged on the fixed rod is matched with a second laser displacement sensor arranged on the movable rod to measure the thickness of the cast pipe. According to the utility model, the tug device is installed, the cast pipe is moved directionally and at a fixed point, the rotating disc enables the cast pipe to rotate at a specific angle, the function of annularly detecting the wall thickness of the cast pipe is met, the lifting device and the weighing device are installed to meet the weighing function, wall thickness detection data are compared, the pipe weight is matched, and the quality of the cast pipe is judged more accurately.

The invention discloses a nodular cast iron pipe cutting-off process and device based on micro pipe jacking, and the cutting-off process comprises the following steps: conveying nodular cast iron pipes into a pipe feeding mechanism through external conveying equipment, and then conveying the nodular cast iron pipes to a centering mechanism in sequence through the pipe feeding mechanism; the transverse position of the nodular cast iron pipe is adjusted through the centering mechanism, and then the nodular cast iron pipe is fed into the pipe cutting mechanism; and a first rotating assembly in the pipe cutting mechanism drives the nodular cast iron pipe to rotate, and meanwhile, a pipe cutting assembly cuts the outer circle face of the nodular cast iron pipe, so that one end of the nodular cast iron pipe is cut off to form a micro-jacking pipe blank with the specified length. The nodular cast iron pipe cutting device can improve the nodular cast iron pipe cutting efficiency and stability.

The utility model discloses a nodular cast iron pipe fitting elbow joint suitable for complex terrains, which comprises an elbow joint, a pipeline, locking rings and a connecting ring, two ends of the elbow joint are respectively connected with the pipeline through the locking rings, and the locking rings are fixed on the elbow joint through mounting sleeves and locking screws. The connecting ring is connected with the connecting rod in a hanging mode through the hanging groove and matched with the connecting sleeve on the pipeline in a clamped mode, and the connecting rod tensions the connecting ring and the locking ring through the adjusting sleeve and the nut so as to achieve rapid locking. The limiting groove is clamped with a clamping rib on the outer side of the connecting sleeve to limit rotation of the connecting ring, a check ring is arranged on the outer side of the connecting sleeve and used for limiting longitudinal sliding of the connecting ring, the two ends of the bent connector are in sealing fit with a sealing ring through clamping rings to improve the sealing performance, and a reinforced fiber layer is embedded in the sealing ring to enhance the pressure resistance. The bent connector is simple in structure and convenient to install, can achieve rapid locking and efficient sealing of the bent connector and a pipeline, meets the use requirements under the complex terrain environment, and solves the problems that a traditional pipe fitting is loose in connection and poor in sealing performance.

The utility model relates to the technical field of nodular cast iron pipe brushing equipment, in particular to an automatic nodular cast iron pipe socket brushing device which comprises a fixing base, a brushing unit and a driving unit, and the driving unit is arranged on the fixing base and used for driving the brushing unit to slowly rotate around the axial central axis of a nodular cast iron pipe. The brushing unit comprises a brushing body, the vertical distance between the brushing body and the central axis of the nodular cast iron pipe is equal to the inner radius of the nodular cast iron pipe, a material containing cavity is formed in the brushing body, a feed inlet which is communicated with the material containing cavity and can be closed is formed in the brushing body, and a sponge layer is arranged on the side face, facing the end of the inserting opening, of the brushing body. And the sponge layer is communicated with the material containing cavity and is used for brushing a coating on the socket end part of the nodular cast iron pipe. Due to the fact that the sponge can absorb and store a certain amount of coating, the coating can be released more evenly during brushing, meanwhile, the coating is prevented from dripping, and the automatic brushing effect of the inserting opening end of the nodular cast iron pipe is achieved.

The invention discloses a spraying and centrifuging device and process for a cement mortar lining of a nodular cast iron pipe, and belongs to the field of spraying of a ball pipeline lining. The device comprises a material mixing mechanism, a material conveying mechanism, a spraying mechanism and a centrifuging mechanism; the spraying mechanism is driven by high-pressure air to rotate, and cement mortar is evenly sprayed to the inner wall of the nodular cast iron pipe. The centrifugal mechanism is used for driving the nodular cast iron pipe to rotate and applying a vibration effect; the cement mortar comprises the following components in parts by mass: 100 parts of cement, 30-44 parts of water and 150-200 parts of sand; the nodular cast iron pipe keeps rotating at a low speed, mortar raw materials are evenly mixed through the mixing mechanism and conveyed to the spraying mechanism through the conveying mechanism to be sprayed out, the conveying mechanism moves at a constant speed, mortar is evenly sprayed to the inner wall of the pipeline, and the pipeline rotates at a high speed to further improve lining compactness and surface flatness. The thickness uniformity of the cement mortar lining is effectively improved, the high-speed centrifugation time is shortened, and the lining layering problem is solved.

This invention relates to the fabrication of ductile iron pipe jacking flanges for trenchless pipeline laying, specifically to a cold bending forming device and its forming process for ductile iron pipe jacking flanges. The cold bending forming device for ductile iron pipe jacking flanges includes an equipment platform and a power drive mechanism, an active bending wheel assembly, an anti-torsion guide wheel assembly, and an outer support wheel assembly mounted on it. The active bending wheel assembly consists of a central active wheel and two side active wheels arranged in an isosceles triangle, forming a bending channel between them. The first driven wheel of the anti-torsion guide wheel assembly is symmetrically arranged in an inward V-shape on both sides of the central active wheel. The second driven wheel of the outer support wheel assembly is distributed in an outward V-shape, coplanar with the highest surface generatrix of the third driven wheel in the middle, jointly supporting the plate to be processed. This invention enables integral cold bending forming of the flange, reducing material waste and improving production efficiency and forming accuracy.

The invention discloses a nodular cast iron pipe cement lining automatic adjusting system, and belongs to the field of nodular cast iron pipe manufacturing, the nodular cast iron pipe cement lining automatic adjusting system comprises a supporting mechanism and a PLC control cabinet installed on the surface of the supporting mechanism, an adjusting mechanism is installed on the surface of the supporting mechanism, and a feeding mechanism is installed on the surface of the adjusting mechanism; the adjusting mechanism comprises nodular cast iron pipe bodies rotationally connected to the surface of the supporting mechanism in a path array mode, and a feeding pipe is inserted into one nodular cast iron pipe body. Through cooperative use of the devices, the cement flow is monitored in real time based on the industrial high-definition AI recognition camera, the cement output and the rotating speed of the moving wheels are controlled through the PLC control cabinet, and the moving speed of the storage box is adjusted, so that the cement output is matched with the moving speed of the storage box; the amount of cement flowing to the inner wall of the nodular cast iron pipe body from each position of the feeding pipe is more uniform, and meanwhile the real-time scene of the interior of the nodular cast iron pipe body is displayed on a client side.

The utility model discloses hoisting equipment for nodular cast iron pipe installation, which is characterized in that a hoisting component is arranged in the middle of a cross beam and comprises a fixed seat arranged in the middle of the cross beam and a suspension piece arranged on the fixed seat, and hoisting fixing components are arranged on the cross beam and positioned on two sides of the hoisting component; the hoisting fixing assembly comprises a first fixing piece and a second fixing piece which are oppositely arranged, the first fixing piece and the second fixing piece are jointly connected with a suspension driving piece, a first suspension rope is arranged on the suspension driving piece, a second suspension rope is arranged on the fixing base, and the top of the first suspension rope and the top of the second suspension rope are jointly connected with an annular hoisting piece. According to the hoisting equipment for mounting the nodular cast iron pipe, in the hoisting process, the nodular cast iron pipe is suspended by the suspension piece so as to bear the main weight, the first fixing piece and the second fixing piece are clamped on the pipe wall of the nodular cast iron pipe so as to play a role in assisting suspension, and the nodular cast iron pipe is prevented from inclining.

The invention discloses a cast pipe bell and spigot size detection mechanism and a detection method thereof. The mechanism comprises a pipe frame, an industrial robot, a base A and a base B, a nodular cast iron pipe is arranged on the surface of the pipe frame, a bell end is arranged on one side of the nodular cast iron pipe, and a spigot end is arranged on the other side of the nodular cast iron pipe. The industrial robot is arranged on the side edge of the pipe frame and comprises a base A, and the base A is arranged on one side of the pipe frame; accurate and rapid measurement is realized through a combined working mode of the visual tracker and the multi-line laser scanner in the size measuring instrument, the size detection quality and the detection efficiency are improved, and the rejection rate caused by size deviation is effectively reduced; the size of the nodular cast iron pipe at the room temperature is calculated according to the temperature-size evolution rule by considering the thermal expansion and cold contraction characteristics of the centrifugal nodular cast iron pipe, an accurate data basis is provided for the polishing process, the situation that the size of the polished cast pipe is unqualified due to the cold contraction effect is avoided, the product percent of pass is increased, and the production cost is reduced.

The utility model discloses a transfer device after nodular cast iron pipe painting, which comprises a V-shaped transmission chain plate and a nodular cast iron pipe, the V-shaped transmission chain plate is fixedly connected with a support column in a welding mode, and the support column can stably support the nodular cast iron pipe. The supporting columns are additionally arranged on the V-shaped conveying chain plates, and the excellent coating protection effect is achieved in the transfer process of the nodular cast iron pipes. When the nodular cast iron pipe is stably placed on the transfer device, the pipe body of the nodular cast iron pipe only makes contact with the supporting columns and is completely isolated from other parts of the conveying chain plate, and the unique contact mode greatly reduces the contact area of the coating surface of the nodular cast iron pipe. Compared with the large-area fitting of the pipeline and the transmission surface in the traditional transfer mode, the device can protect the coating to the maximum extent.

The utility model provides a riding wheel mechanism for nodular cast iron pipe production, and relates to the technical field of nodular cast iron pipe production, the riding wheel mechanism comprises a movable pressure reduction assembly and a transfer output component, the top end of the movable pressure reduction assembly is provided with a steering mechanism in bolted connection, and the top end of the steering mechanism is provided with an expansion and contraction displacement mechanism in bolted connection. A transfer output part in bolted connection is arranged on the side of the upper portion of the expansion and contraction displacement mechanism, a nodular cast iron pipe body in rolling fit is arranged at the output end of the transfer output part, and the transfer output part comprises a side bracket, a lifting frame, an annular shell, a pneumatic telescopic rod, a wheel sleeve shell and an electric guide wheel. According to the utility model, the pneumatic telescopic rods which are annularly distributed in a ring-shell shape at equal angles are used for outputting power to operate, then the wheel sleeve shells and the electric guide wheels are attached to the nodular cast iron pipe body, and the nodular cast iron pipe body is output to a target place after rolling operation and output, so that the final consignment effect is completed.

The utility model discloses a lifting appliance for nodular cast iron pipes, which comprises a nodular cast iron pipe body, positioning structures and an assembling component, and relates to the technical field of lifting tools, the positioning structures are arranged at the two ends of the nodular cast iron pipe body and comprise two end part limiting components and internal supporting components arranged on the opposite surfaces of the two end part limiting components; and the hoisting assembly is arranged on the opposite faces of the two end limiting assemblies, the assembling assembly is arranged between the two positioning assemblies and used for assembling the two positioning structures into a whole, and the assembling assembly comprises two assembling frames, a winding roller rotationally connected to the inner bottom walls of the assembling frames and a first steel rope wound around the surface of the winding roller. The supporting assembly adopts the sliding connection design of a gear rod and a telescopic frame and is matched with a fixing bolt and a multi-gear fixing groove, nodular cast iron pipes with different calibers can be compatible, a worm gear and a worm of the assembling assembly drive a first steel rope to be wound and unwound, the length compensation capacity is provided, and therefore the hoisting requirements of the nodular cast iron pipes with different lengths can be met.

The invention relates to a chamfering machine for nodular cast iron pipe machining and application of the chamfering machine, and relates to the technical field of pipe fitting machining, the chamfering machine comprises an equipment body, a chamfering mechanism and a sealing assembly, and the chamfering mechanism is arranged on the equipment body; the sealing assembly comprises an air blowing piece arranged on the chamfering mechanism. An air blowing pipe is mounted at the output end of the air blowing part; a mounting shell is mounted at one end of the air blowing pipe; a first air bag is mounted on the mounting shell, the first air bag is communicated with the mounting shell, and a protective pad is arranged at the contact position of the first air bag and the equipment main body. According to the chamfering machine for nodular cast iron pipe machining, the expanded first air bag makes contact with the inner wall of the nodular cast iron pipe to form sealing, dust generated during chamfering machining is blocked, the follow-up cleaning cost is remarkably reduced, meanwhile, contact between water vapor and the pipe wall and contact between salt mist and the pipe wall are reduced, and the corrosion risk is reduced; and the effect of protecting the nodular cast iron pipe is achieved.

The utility model discloses a flexible interface structure of a nodular cast iron pipe fitting, which is used for connecting a first pipe fitting and a second pipe fitting and comprises an outer pipe, a telescopic interlayer pipe and an inner pipe, the telescopic interlayer pipe is coaxially and fixedly attached to the outer peripheral surface of the inner pipe, and the outer pipe is coaxially and fixedly attached to the outer peripheral surface of the telescopic interlayer pipe; the two ends of the outer pipe and the inner pipe are longer than the telescopic interlayer pipe, so that socket ring grooves are formed in the two ends of the flexible connector structure. The end faces, inserted into the socket ring groove, of the first pipe fitting and the second pipe fitting abut against the telescopic interlayer pipe in an attached mode and are attached to the inner wall of the socket ring groove. A plurality of telescopic allowance holes are formed in the middle of the telescopic interlayer pipe; connecting discs are integrally formed at two ends of the outer pipe; the first pipe fitting and the second pipe fitting are connected with a pressing flange, and the pressing flange is fixedly connected with the connecting disc through a connecting bolt. Good flexibility and flexibility during flexible connection of the pipe fitting are guaranteed, sealing reliability and stability are effectively improved, and leakage is not prone to occurring.

The utility model relates to the technical field of cast pipe lining coating, and discloses a plug for cast pipe lining coating. The plug comprises a framework body, a first inflation rubber ring and a second inflation rubber ring, the framework body comprises an end plate and an annular plate arranged on one side of the end plate, a first annular groove is formed in the inner wall of the annular plate, a second annular groove is formed in the side, close to the annular plate, of the end plate, the first inflation rubber ring is embedded in the first annular groove, and the second inflation rubber ring is embedded in the second annular groove. The second inflation rubber ring is embedded in the second annular groove and used for being inflated to expand so as to be matched and pressed with the outer wall of the cast pipe, the second inflation rubber ring is embedded in the second annular groove, and the second inflation rubber ring is used for being inflated to expand so as to be attached to the inner wall of the cast pipe and form a lining chamfer; according to the plug, the subsequent chamfering procedure of the lining at the socket end of the nodular cast iron pipe can be omitted, the production process is accelerated, and the machining cost is saved.