432 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 utility model relates to the technical field of nodular cast iron pipes, in particular to a socket type pipeline connector which comprises a socket, a spigot and a sealing piece, the socket comprises an annular sealing groove, an annular limiting part and a deflection groove which are coaxial, the annular limiting part separates the annular sealing groove and a conical groove, an annular retaining groove is formed in the annular sealing groove, and the deflection groove is formed in the spigot. An annular containing groove is formed by the distance between the annular retaining groove and the annular limiting part. The maximum-diameter port of the conical groove is connected with the annular limiting part; the inner diameter of the annular limiting part is smaller than the maximum inner diameter of the conical groove; the sealing piece comprises a hard rubber ring and a soft rubber ring, the outer ring of the hard rubber ring is arranged in the annular retaining groove, the outer ring of the soft rubber ring is tightly attached to the annular containing groove, the inner diameter of the hard rubber ring and the inner diameter of the soft rubber ring are smaller than the inner diameter of the annular limiting part, and the outer wall of the inserting opening is attached to the inner ring of the soft rubber ring in a sealed mode. Under the condition that the insertion depth of an insertion opening of an existing socket and spigot type pipeline connector into a deflection groove is the same, the deflection angle of the insertion opening in the deflection groove can be effectively increased.

A large-diameter nodular cast iron pipeline adjusting and butting device for water conservancy construction comprises a device base, a groove is formed in the device base, a sliding base capable of sliding horizontally is arranged in the groove, supporting plates are fixed to the two sides of the top of the sliding base, a sliding frame capable of sliding horizontally is arranged between the two supporting plates, and a mounting base is fixed to the top of the sliding frame. A rotatable pipeline positioning ring is arranged in the mounting seat, a to-be-loaded nodular cast iron pipeline is clamped in the middle of the pipeline positioning ring, and a loaded nodular cast iron pipeline is mounted at one end of the to-be-loaded nodular cast iron pipeline. The rocker is rotated to drive the worm to rotate to be meshed with the worm gear, the worm gear is stressed to rotate around the fulcrum shaft and is in threaded fit with the screw, and the screw is stressed to horizontally slide on the side wall of the pipeline positioning ring so as to drive the clamping ring to be attached to the side wall of a to-be-loaded nodular cast iron pipeline to further clamp and fix the to-be-loaded nodular cast iron pipeline. And the large-diameter nodular cast iron pipeline cannot shake and fall during butt joint adjustment, and the use stability is improved.

The invention discloses a nodular cast iron pipe machining device, and relates to the technical field of nodular cast iron pipe production, and the nodular cast iron pipe machining device is characterized in that an inner supporting mechanism is prevented from falling off due to the fact that the upper side and the lower side are not fixed due to placement of an iron pipe through a limiting rod and a rotating rod; the complexity and the labor intensity of manual operation are reduced through the self-adaptive inner supporting function, an operator only needs to conduct simple equipment operation and monitoring, the working difficulty and the labor intensity are reduced, the inner supporting plate is made to rotate through the driving disc, and therefore the iron pipe is made to rotate; the polishing mechanism polishes the outer circumferential face of the iron pipe from bottom to top through the reciprocating screw rod, the iron pipe is not fixed through the power gear, the rotating sleeve and the connecting rod after polishing is completed, the iron pipe is conveniently output, contact between an operator and equipment and the iron pipe in the polishing process is reduced, and the polishing efficiency is improved. And the safety accident risk caused by misoperation is reduced.

The invention relates to the technical field of nodular cast iron pipe machining, in particular to a nodular cast iron pipe water-cooling metal type centrifugal machine of an electric drive system. The device comprises a fan-shaped ladle overturning system, a pouring launder, a pipe mold and a pipe drawing device which are sequentially connected, rotation of the pipe mold is controlled by a pipe mold rotating system, and the pipe mold is arranged on a pipe mold walking system so as to reciprocate between the pouring launder and the pipe drawing device through the pipe mold walking system; according to the nodular cast iron pipe water-cooling metal mold centrifugal machine of the electric driving system, the flow of the metal liquid in the first flow guide plate is sensed through the telescopic control mechanism, when the performance of the driving motor is in a normal state, the pouring runner is controlled to be in an original state, flowing intervention on the metal liquid is avoided, and the qualification rate of pipes is guaranteed. And when the performance of the driving motor is reduced, the pouring runner is automatically extended, so that the metal liquid is prevented from flowing to the ground, and meanwhile, the influence on the subsequent movement of the pipe die is also avoided.

The utility model relates to a nodular cast iron pipe jacking machining rib plate welding system which comprises a nodular cast iron pipe, a pushing flange and a rib plate, and when the nodular cast iron pipe enters a corresponding station of the nodular cast iron pipe jacking machining rib plate welding system, the pushing flange is installed; the automatic welding device comprises a supporting device and a clamping mechanical arm, the clamping mechanical arm is a six-degree-of-freedom industrial robot, a magnetic attraction tool is arranged on a tail end executor of the clamping mechanical arm, and the magnetic attraction tool transports the rib plate to a to-be-welded position; the welding mechanical arm is a six-degree-of-freedom industrial robot and is used for welding the rib plate, so that the rib plate is fixedly connected with the nodular cast iron pipe and the pushing flange respectively; compared with the prior art, the nodular cast iron pipe rib plate welding device has the beneficial effects that the nodular cast iron pipe rib plate welding work is achieved through cooperation of the clamping mechanical arm, the supporting device and the welding mechanical arm.

The invention discloses a welding device for repairing a nodular cast iron pipeline, and belongs to the technical field of pipeline welding repairing. The welding device for repairing the nodular cast iron pipeline comprises a supporting mechanism and a metal patch used for repairing a hole in a pipeline body, and the supporting mechanism is in threaded connection with an abutting fixing mechanism used for abutting against the metal patch; a rotary driving mechanism is further mounted in the center of the top of the supporting mechanism; a distance adjusting mechanism is fixedly mounted at the bottom of the rotary driving mechanism, and an automatic welding mechanism is slidably mounted at the other end of the distance adjusting mechanism. And one side of the automatic welding mechanism is fixedly connected with a height adjusting mechanism. By designing the rotary driving mechanism, the distance adjusting mechanism, the automatic welding mechanism and the height adjusting mechanism, the height of the lifting support can be adjusted along with the height change of the metal patch, so that the height of the automatic welding mechanism can be automatically adjusted as a whole, and a welding gun can complete high-quality all-directional welding.

The utility model relates to a nodular cast iron pipe cement lining internal grinding walking mechanism which comprises a grinding assembly. The walking frame is of a rigid structure with the side face in an N shape, the two ends fixed, the lower portion provided with a gap in the travel direction of the nodular cast iron pipe cement lining internal grinding walking mechanism and the upper portion provided with a plane. The trolley assembly comprises a trolley base, a connecting arm and an adjusting arm, the trolley base, the connecting arm, the adjusting arm and a connecting shaft form a closed annular structure, and the trolley base, the connecting arm, the adjusting arm and the connecting shaft are in a wrapping posture and embraced on the walking frame; the driving device is located on the trolley base and provides power for movement of the trolley base; compared with the prior art, the trolley assembly has the advantages that the trolley base is stabilized on the walking frame in a tree-embracing mode through the connecting arm, the adjusting arm and the connecting shaft, the stability of the trolley assembly in the whole movement process is improved, the grinding quality is improved, and adverse factors such as vibration generated by grinding are avoided.

The invention provides a centrifugal casting method, device and equipment for a nodular cast iron pipe and a medium, and relates to the technical field of centrifugal casting. The method comprises the steps that analog simulation is conducted on the solidification structure in the centrifugal casting process of the nodular cast iron pipe, and a simulation result of the solidification structure is obtained; aiming at the simulation result of the solidification structure, fitting a mapping relation between each casting process parameter and the grain size of the solidification structure in a plurality of casting process parameters influencing the solidification structure; based on the mapping relation between each casting process parameter and the grain size of the solidification structure, casting process values corresponding to the multiple casting process parameters are determined; and performing centrifugal casting on the nodular cast iron pipe based on the casting process value. By the adoption of the scheme, the problems that due to improper selection of relevant casting process parameters, the solidification structure of the nodular cast iron pipe has the defects of air holes, impurities, shrinkage porosity, shrinkage cavities, hot cracks and the like can be solved, and therefore the quality of the produced nodular cast iron pipe is improved.

The invention discloses a nodular cast iron pipe packaging and warehousing system and stacking equipment applying the system, relates to the technical field of nodular cast iron pipe packaging, and solves the technical problem that an existing nodular cast iron pipe packaging and warehousing technology is insufficient in the aspects of transportation, sorting, stacking and system collaboration.The nodular cast iron pipe packaging and warehousing system comprises a conveying mechanism, and a sorting mechanism is arranged on the right side of the conveying mechanism; the front surface, the right side and the back of the sorting mechanism are each provided with a pipe conveying mechanism, an automatic lifting and batten adding mechanism and a transferring mechanism. Through cooperative work of the mechanisms, the equipment can adjust the supporting height according to the pipe diameter, work conflicts are avoided in combination with an intermittent discharging component, stable and efficient transportation is achieved, and the sorting mechanism collects codes through an industrial camera and is matched with a clamping and discharging component to accurately sort and transport pipe fittings; the whole system is coherent in working process and sufficient in early-stage preparation, has a manual mode and an automatic mode, achieves intelligent control, improves the production efficiency and facilitates data management and source tracing.

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 provides an axial transportation device for socket and spigot pipes, which comprises a plurality of sets of supporting wheels. The sets of supporting wheels are composed of supporting wheel mechanisms arranged perpendicular to the axis of the socket and spigot pipes. The supporting wheel mechanisms are arranged on both axial sides of the socket and spigot pipes during transportation. The supporting wheel mechanisms are active supporting wheel mechanisms or driven supporting wheel mechanisms. The set of supporting wheels includes one active supporting wheel mechanism and one driven supporting wheel mechanism, or includes two active supporting wheel mechanisms. In the set of supporting wheels of the present invention, the supporting wheels rotate in place, and the rotation speed of the supporting wheel body and the angle of the supporting wheel body can be adjusted to match the rotation speed and the axial moving speed of the ductile iron pipe, improving the transportation stability of the ductile iron pipe. At the same time, the operation time and operation efficiency during the cleaning and spraying of the ductile iron pipe are improved.

The invention discloses a dust collection device for nodular cast iron pipe fitting welding. The dust collection device comprises a movable base. Secondary electric sleeve telescopic equipment is fixedly arranged on the upper side of the movable base, the secondary electric sleeve telescopic equipment is vertically arranged, an upper supporting frame body is fixedly arranged at the top of the secondary electric sleeve telescopic equipment, and adjustable dust suction mechanisms and dust removal mechanisms are symmetrically arranged on the two sides of the upper supporting frame body; a water receiving basin body is placed on the movable base and located under the punched steel plate cylinder, and a dense and continuous water curtain environment is created by a water spraying curtain area jointly formed by the two opposite and close water spraying and smoke dust reducing plate bodies. And meanwhile, the water curtain sprayed by the auxiliary water spraying head in the punched steel plate cylinder further enhances the overall smoke dust reducing effect. The dual water curtain arrangement is matched with each other, so that gas containing dust and other substances can be subjected to multiple times of water curtain gifts when passing through.

The utility model discloses a nodular cast iron pipe sand core lifting appliance which comprises a central column, a lifting part is arranged at the top end of the central column, the central column is connected with a fixing support, the fixing support is connected with an annular framework located on the outer ring of the central column, and a plurality of first guide sleeves are arranged at the bottom of the annular framework. A telescopic rod is slidably arranged in the first guide sleeve, a bearing plate is arranged at the outer end of the telescopic rod, a first connecting rod is rotationally connected to the inner end of the telescopic rod, a movable ring is slidably arranged on the center column, the first connecting rod is rotationally connected with the movable ring, and a reset spring used for being connected with the movable ring is arranged on the center column. The movable ring is rotationally connected with a second connecting rod, an operating rod is rotationally arranged on the center column and rotationally connected with the second connecting rod, a first locking part is arranged on the operating rod, and a second locking part used for being matched with the first locking part is arranged on the fixing support. The hoisting device has the advantages of convenience in positioning, stability in hoisting and simplicity in operation.

The utility model discloses a nodular cast iron pipe interface sealing structure which comprises a connecting pipe set sleeved outside two cast iron pipe interfaces, the connecting pipe set comprises an internal thread pipe and a connecting pipe, external threads are arranged on the outer sides of the ends, close to each other, of the two cast iron pipes, a first sealing raw material belt is arranged on the outer side of each cast iron pipe, and a second sealing raw material belt is arranged on the outer side of each first sealing raw material belt. Each cast iron pipe is sleeved with a nut in a threaded mode, and a sealing ring is fixedly arranged on the side, close to the connecting pipe, of each nut. The nodular cast iron pipe joint sealing device is reasonable in structural design, the two cast iron pipes are connected to form first-stage sealing, the inner threaded pipe is matched with the first sealing raw material belt to conduct second-stage sealing on the joint of the two cast iron pipes, the nut is matched with the sealing ring to conduct third-stage sealing on the joint of the two cast iron pipes, and the nodular cast iron pipe joint sealing effect is improved; the problems that most connectors of existing nodular cast iron pipes are poor in sealing effect, water loss and water pollution are caused by leakage easily, and the use efficiency of the nodular cast iron pipes is seriously affected are solved.

The utility model discloses a spheroidal graphite cast iron pipe roundness correction device, which belongs to the technical field of spheroidal graphite cast iron pipe correction equipment, and comprises a base, an annular roundness correction mechanism arranged on the base and sleeved outside a spheroidal graphite cast iron pipe, and a control mechanism for driving the annular roundness correction mechanism to perform roundness correction operation on the spheroidal graphite cast iron pipe in the radial direction, the annular roundness correction mechanism comprises annular outer discs fixedly arranged on the two sides of the base correspondingly, a rotary disc concentrically arranged between the two annular outer discs and controlled by the control mechanism to rotate and a plurality of roundness correction sliding blocks evenly arranged in the circumferential direction of the annular outer discs at intervals, and the two ends of each roundness correction sliding block are slidably connected with the two annular outer discs correspondingly. A plurality of inclined sliding grooves corresponding to the round calibration sliding blocks are formed in the rotary disc in a penetrating mode, and the round calibration sliding blocks are movably connected with the inclined sliding grooves. The roundness correction device is simple in structure and easy and convenient to operate, saves economic cost and has a good roundness correction function.

The utility model provides a nodular cast iron pipe cement lining grinding machine, which relates to the technical field of nodular cast iron pipes, and comprises a clamping component and a sliding mechanism, the sliding mechanism assembled by bolts is arranged above one end of the clamping component, and a grinding mechanism is arranged above the moving end of the sliding mechanism. The sliding mechanism comprises a bolt base, a pedestal plate, a groove box, a gearbox, a driving motor, a worm set, a sliding base, a telescopic canvas cover and a fixed base. According to the pipeline inner wall polishing device, the sliding mechanism is mainly used for carrying out telescopic operation, so that the inner wall of a pipeline can be accurately polished under the joint cooperation of the air cylinder lifting base, the double fixing plates, the rotating motor, the double discs, the adjusting worm, the adjusting base, the connecting rod, the electric rotating base and the polishing wheel which are installed on the polishing mechanism; due to the joint cooperation of the rotating motor, the double discs, the adjusting worm, the adjusting base and the connecting rod, damage to the inner wall of the pipeline caused by swinging of the connecting rod can be avoided, and the intact degree of product grinding is improved.

The invention discloses a remote centralized control system for a cast pipe production line, which comprises an operation interface module, an intelligent parameter adaptation module, a monitoring module and a data management module, and is characterized in that the operation interface module is based on Siemens WinCC software, and the intelligent parameter adaptation module applies a button C action code technology in the Siemens WinCC software; the whole spheroidal graphite cast pipe production line is connected into a centralized control system, operators perform remote operation in a centralized control room in a unified manner, the operation interface module is partitioned according to the production process, the operation state, the parameter setting range and the real-time parameters of equipment in each link are clearly displayed, and the operators can quickly acquire key information through different colors, icons and text descriptions, so that the production efficiency is improved. Information transmission is changed from manual transmission to system real-time sharing, communication between posts is free of any difficulty and obstruction, communication is rapid and effective, problems of each working section can be rapidly transmitted and efficiently processed, and the production efficiency and the product quality are greatly improved.

The invention belongs to the technical field of nodular cast iron pipe machining, and particularly relates to an organic powder coating nodular cast iron pipe product which comprises a nodular cast iron pipe body and an organic powder inner spraying layer, the organic powder inner spraying layer is evenly arranged on the inner wall of the nodular cast iron pipe, and the organic powder inner spraying layer is an organic component. The organic component is one of food-grade polyaspartic acid ester polyurea resin, food-grade epoxy resin, food-grade polyethylene plastic, food-grade polypropylene plastic or food-grade polyvinyl alcohol; the manufacturing process comprises the following steps: S1, base material pretreatment: carrying out pretreatment such as polishing and shot blasting treatment on the inner wall of the nodular cast iron pipe so as to increase the surface area of the inner wall and increase the binding force of a coating and a base body; and S2, a coating process. The coating of the nodular cast iron pipe is high in adhesive force, high in finish degree, good in abrasion resistance, resistant to corrosion and ultraviolet rays, free of discoloration, capable of meeting the regulations of GB / T13295 and GB / T26081 and capable of directly conveying drinking water.

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 invention relates to the technical field of nodular cast iron pipe jacking construction equipment, in particular to a hydraulic device for nodular cast iron pipe jacking construction, which comprises a mounting frame, a support plate, a hydraulic cylinder, a hanger, a traction mechanism and a control assembly. The supporting plate is slidably mounted on the mounting frame, the fixed end of the hydraulic cylinder is fixedly mounted on the mounting frame, the movable end of the hydraulic cylinder is fixedly connected to the supporting plate, and when the hydraulic cylinder works, the supporting plate is pushed to slide on the mounting frame; the hanging piece is mounted on the mounting frame and is used for hanging the mounting frame on a nodular cast iron pipe socket to be jacked; the traction mechanism is installed on the supporting plate and used for fixing an insertion opening of a nodular cast iron pipe to be jacked to a bellmouth where the nodular cast iron pipe is installed. The control assembly is installed on the installation frame and used for controlling the operation state of the hydraulic cylinder. The large-diameter nodular cast iron pipe jacking device has the effect of improving the jacking construction efficiency of the large-diameter nodular cast iron pipe.

The utility model discloses a quick mounting tool for a large-diameter nodular cast iron pipe, which belongs to the technical field of mounting tools and comprises a square rod, a cushion block is fixedly assembled on the outer side of the square rod, a long rod is slidably connected to the inner wall of the square rod, a round rod is fixedly assembled on one side, far away from the square rod, of the long rod, and a steel plate is fixedly assembled on the outer edge of the round rod. An inserting rod is driven to move by pulling a disc, then the bottom end of the inserting rod can be conveniently moved out of the inner wall position of an assisting rod, the ends, away from a rotating block, of the two assisting rods can be pulled out from the middle position of a first fixing plate and a second fixing plate, and therefore a worker can rotate the two assisting rods to drive the device and the nodular cast iron pipe to rotate; the power assisting rod can be folded and stored when not in use, so that space occupation is reduced, the power assisting rod can be conveniently held by multiple persons together to exert force to rotate, the problems that time and labor are wasted during installation due to insufficient strength of a single person, and the installation tightness is insufficient are solved, and the power assisting rod can be folded and stored when not in use, so that the space occupation is reduced.

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 pressure spraying device for prolonging the service life of a nodular cast iron pipe cold mold method pipe mold, which belongs to the field of centrifugal casting and comprises a stirring mechanism, a discharge port of the stirring mechanism is connected with a feed port of a high-pressure air type power mechanism, the power mechanism is provided with a high-pressure air inlet, and the bottom of the power mechanism is connected with a material pipe. The material pipe is connected with a rotatable spray head mechanism, the spray head mechanism comprises a fan-shaped nozzle connected with the material pipe, and the fan-shaped nozzle is further connected with a high-pressure air inlet of a power mechanism through an air pipe. According to the utility model, paint can be sprayed at the bell end of the cold-mold-method pipe mold in a casting gap, the paint is dried by virtue of waste heat of the pipe mold, and meanwhile, the nozzle can spray high-pressure air to purge the interior of the pipe mold, so that the service life is effectively prolonged.

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 invention belongs to the technical field of nodular cast iron pipe machining, and particularly relates to a nodular cast iron pipe product based on composite material outer spray paint and a manufacturing process. The manufacturing process comprises the following steps that S1, thermal refining, inoculation and spheroidizing are conducted on molten metal; s2, casting of molten metal and cooling of the nodular cast iron pipe; s3, annealing heat treatment; s4, shot blasting treatment is conducted on the outer wall of the nodular cast iron pipe; and S5, the outer wall is subjected to two-layer cross winding with the included angle of + / -50-70 degrees with the straight section of the pipe body, and finally, after one-layer annular winding perpendicular to the straight section of the pipe body is conducted, outer surface resin curing, lining layer coating and paint spraying are conducted. According to the method, the anti-corrosion treatment is carried out twice, the service life of a cast pipe product under the severe condition is guaranteed through multi-coating anti-corrosion, the service life of the cast pipe is prolonged, and consumption of steel resources is greatly reduced.