154 results about "Plastic pipework" patented technology

The invention discloses an automatic plastic pipeline winding machine, and relates to the field of plastic pipeline production, the automatic plastic pipeline winding machine comprises a mold driving mechanism, a winding mold pipe and a formed plastic pipe conveying mechanism, the mold driving mechanism comprises a base, a sliding bottom plate and roller carriers, the sliding bottom plate is slidably mounted on the base, and multiple groups of roller carriers are mounted on the sliding bottom plate at intervals; the winding mold pipe is arranged on the roller frame, a cooling pipe is fixedly installed in the winding mold pipe, a plurality of independent cooling cavities are formed between the inner wall and the outer wall of the winding mold pipe in the axial direction of the winding mold pipe, each cooling cavity is provided with an air inlet hose, and the two ends of each air inlet hose are connected with the corresponding cooling pipe and the inner wall of the winding mold pipe correspondingly; the heating mechanism comprises a flame gun installed towards the winding die pipe, the formed plastic pipe conveying mechanism is used for conveying a material belt to the winding die pipe and conveying a plastic pipe to the wound material belt, on one hand, the shrinkage pulling force generated by later cooling is reduced, and on the other hand, the winding coverage area of the front and rear material belts is reduced.

The invention relates to the technical field of die heads for extrusion molding of plastic pipelines, in particular to a multi-layer co-extrusion pipe die head with a pre-diverter. In order to solve the problems that a traditional co-extrusion pipe die head shunting structure is integrated on a spiral body, melt retention and uneven distribution are easily caused due to limited runners and steep steering, and then deviation of the wall thickness of a pipe is caused, the scheme is provided with a die body, the spiral body containing three layers of spiral distribution runners, and a first pre-shunting device and a second pre-shunting device which are sequentially arranged in the axial direction; the first pre-diverter diverts an outer-layer melt to an outer-layer spiral distribution runner through a first annular gap runner, and the second pre-diverter diverts an inner-layer melt to an inner-layer spiral distribution runner through a second annular gap runner, and is matched with a plurality of groups of feeding channels, a diversion cone, a closed-loop heating temperature control system and a layered and integrally combined wall thickness adjusting structure; and precise shunting and stable conveying of the melt are achieved. According to the scheme, the melt retention risk is eliminated, the distribution uniformity is improved, the pipe forming quality is guaranteed, and the device is suitable for multi-specification production and convenient to maintain.

The invention discloses plastic pipeline particles prepared from waste incineration fly ash and a preparation method of the plastic pipeline particles. The particles are prepared from the following raw materials in parts by weight: 5-25 parts of PE, 20-100 parts of superfine calcium carbonate, 1-5 parts of needle-like wollastonite, 1-5 parts of chopped carbon fibers, 1-15 parts of rutile type titanium dioxide, 10-75 parts of waste incineration fly ash, 1-20 parts of paraffin, 0.2-5 parts of a coupling agent and 0.5-10 parts of a dispersing agent. The preparation method comprises the following steps: 1, cleaning and airing the fly ash, and crushing and grinding the fly ash into 600-1250-mesh powder P; 2, mixing the powder P with inorganic fillers such as superfine calcium carbonate at a high speed of 100-130 DEG C to obtain a composite filler M; 3, mixing and modifying the filler M with a dispersing agent and a coupling agent at a high speed to obtain modified powder MP; 4, MP, PE and paraffin are mixed and plasticized at a high speed, and single-screw extrusion granulation is performed. The particles achieve fly ash recycling and are excellent in processability, the prepared PE pipeline is high in strength, resistant to corrosion and long in service life and can be used as an industrial or municipal sewage pipeline, and the preparation method is convenient, fast and efficient.

The utility model provides a pipeline extruding and winding device, belongs to the technical field of plastic pipeline production equipment, and aims to solve the problems that in the process of winding a high-toughness pipeline by a winding machine, manual tightening is needed during binding, so that a pipeline head can be bound after being attached to a pipeline roll, two persons are needed for simultaneous operation, the manual labor intensity is high, and time and labor are wasted. Comprising a vertical plate, a motor is arranged on the back of the vertical plate to drive a rolling ring in front of the vertical plate, a plurality of U-shaped storage frames are distributed on the circumference of the front side of the rolling ring, a top frame is arranged at the top of the vertical plate, a guide structure is arranged on the top frame, a side frame is arranged on one side of the vertical plate, and an air cylinder is arranged on the side frame. An output shaft of the air cylinder penetrates through the side frame to be connected with a pressing plate, and the extrusion face of the pressing plate is parallel to the circumferential tangent plane of the rolling ring.

A manual or hand-held plastic pipe scraper and inspection tool comprising a pipe scraper body 1 having an angled pipe-scraper blade (6, fig 3) and a mirror 2 to view difficult to see preparation areas

The utility model discloses a kind of anti-static fluoroplastic pipeline connecting pieces, it is related to pipeline connecting piece technical field.The utility model includes two pairs of butt joint limiting components of symmetrical arrangement, butt joint limiting component includes trapezoidal transmission ring and trapezoidal transmission block, trapezoidal transmission ring and trapezoidal transmission block between sliding fit, trapezoidal transmission block one side is fixedly connected with arc limiting plate by transmission horizontal column, coaxial heart rotationally connected with butt joint adjusting component between butt joint limiting component, the adjusting support pipe of butt joint adjusting component rotationally arranged, telescopic adjusting pipe is slidably arranged in adjusting support pipe.The utility model is slid along adjusting support pipe inner wall by telescopic adjusting pipe, adjust the spacing between two butt joint limiting components, control trapezoidal transmission ring sliding, between trapezoidal transmission ring and trapezoidal transmission block sliding fit, arc limiting plate radial movement carries out position limitation to plastic pipeline, the connection limitation between different distance to be butt joint pipe is realized.

The utility model discloses a forming device for processing a plastic-lined steel pipe, which belongs to the field of plastic-lined steel pipe processing and comprises a plastic-lined steel pipe processing base, a heating mechanism is arranged at the top of the plastic-lined steel pipe processing base, and a plastic-lined steel pipe forming part is arranged in the heating mechanism. The plastic pipeline can be automatically filled with high-pressure gas when the steel pipe layer and the plastic layer of the plastic-lined steel pipe forming part are heated, the plastic layer can be better attached to the inner wall of the steel pipe through the high-pressure gas, meanwhile, sufficient diffusion and permeation of a binding agent between the plastic layer and the steel pipe are promoted, and therefore the binding force between the plastic layer and the steel pipe is enhanced; the gas pressure and the gas flow are adjusted, so that the phenomenon of layering or stripping between the plastic layer and the steel pipe in the subsequent cooling and using process can be avoided, and the distribution and the thickness of the plastic layer on the inner wall of the steel pipe can be controlled by adjusting the gas pressure and the gas flow, so that the uniformity and the flatness of the plastic layer are ensured.

The utility model relates to the technical field of plastic pipeline production, especially a kind of plastic pipeline processing double-screw extruder, including frame;Still including machine barrel, several machine barrels are fixedly connected on rack, adjacent machine barrel is connected by bolt, machine barrel end bolt connection has blanking barrel, fast connecting support is fixedly connected on machine barrel top, sealing assembly is connected on fast connecting support, selection control component is fixedly connected on rack, and selection control component's output end is connected with fast connecting component;The utility model is connected by multiple machine barrels, meanwhile, multiple fast connecting supports are equipped on multiple machine barrels, then the rapid switching of real-time channel using multiple components, the modularization of device is realized, it is very convenient for subsequent local cleaning and maintenance, greatly improve work efficiency, while can be more maintenance and cleaning condition, flexible adjustment is carried out to blanking passage, can adapt to multiple process flows, and the quality of product produced is better.

The utility model discloses an automatic polyethylene cylinder film heating and sealing device which comprises a workbench, and a plastic pipeline is placed above the workbench. Driving modules are arranged on the two sides of the top of the workbench, transmission mechanisms are arranged on the two sides of the top of the workbench, and the driving modules are at least used for driving the transmission mechanisms to operate. A telescopic assembly is arranged on the transmission mechanism, a heater is arranged at the end of the telescopic assembly, the telescopic assembly is at least used for front-back movement of the heater, and the heater is at least used for heating and shaping polyethylene barrel films at the two ends of the plastic pipeline. The driving module drives the transmission mechanism to move, the position of the heater is changed, the plastic pipeline sealing device can be suitable for sealing operation of plastic pipelines with different lengths, the plastic pipelines are sealed through the heater, and the sealing efficiency is improved. The problems that in the automatic packaging process of a production line of a plastic pipeline, when a polyethylene (PE) barrel film is used for packaging and sealing, the pre-length needs to be used, and the polyethylene (PE) barrel film is wasted are solved.

The invention discloses a multi-layer weft steel skeleton and a pipeline thereof, and relates to the technical field of steel skeleton pipelines, the multi-layer weft steel skeleton comprises internal supporting warps, external spiral wefts are spirally welded outside the internal supporting warps, the internal supporting warps are formed by arranging a plurality of independent warps in the circumferential direction, and the external spiral wefts are spirally welded outside the internal supporting warps. According to the steel skeleton composite plastic pipeline, by means of the unique triangular arrangement structure design of the external spiral wefts, the stress condition of the steel skeleton composite plastic pipeline in the using process is improved, radial deformation of the pipe wall is effectively restrained, and the service life of the steel skeleton composite plastic pipeline is prolonged. And meanwhile, the internal supporting longitude lines cooperatively provide axial rigid support, the overall pressure bearing capacity and impact resistance of the pipeline are remarkably improved through the combined action of the internal supporting longitude lines and the external supporting longitude lines, the phenomenon that the pipeline is exploded in the using process of the steel skeleton composite plastic pipeline is effectively prevented, and then the overall service life of the steel skeleton composite plastic pipeline is effectively prolonged.

The utility model relates to pipeline cutting technical field discloses a cutting device of plastic pipeline extruder, including pipeline main part, the pipeline main part inner wall is pasted with the pasting board, the pipeline main part top surface pastes with cutting knife, the cutting knife top surface pastes with the frame, the frame front side fixedly connected with the base, the base top surface pastes with the moving seat, the moving seat top fixedly connected with first motor and support plate, first motor output fixedly provided with screw rod, the screw rod surface is equipped with the connecting ring, the screw rod end threadedly connected with the screw ring, the screw ring surface rotatably connected with first connecting rod, the connecting ring surface rotatably connected with second connecting rod, in the utility model, through the displacement of screw ring drive pasting board to screw rod as center and draw in or expand outward, can realize through pasting board and pipeline main part inner wall pasting to fix pipeline main part, avoid pipeline main part and take place deformation.

The application discloses a plastic pipeline with spiral strip structure on the outer surface and a preparation method thereof, and comprises the following steps: mixing, hot stirring and cooling and stirring plastic pipeline raw materials to obtain a mixture; feeding the mixture into an extruder and extruding through a die to form a pipe blank with spiral strip structure; making the pipe blank pass through a rotating sizing sleeve assembly and being cooled and shaped in a water tank to obtain the plastic pipeline with spiral strip structure on the outer surface; synchronously rotating and dragging the plastic pipeline by using a rotating pipe dragging mechanism, and then performing length cutting; after cutting, the pipeline is corrected by a correction pipe supporting frame, is dragged by a two-jaw belt dragging machine, and is marked by code spraying, and then is packed into a warehouse to obtain the plastic pipeline with spiral strip structure on the outer surface. The application is a new type of dragging and rotating extrusion technology instead of a traditional die rotating extrusion technology, and the technology can realize long-term stable production and has a high production speed.

This invention discloses a drip irrigation device for potato cultivation in sandy soil. The invention relates to the field of sandy soil potato cultivation technology and includes a storage tank for holding and storing drip irrigation solution. A liquid guide pipe is fixedly installed on the top of the storage tank, an inlet is fixedly installed on one side of the outer surface of the storage tank, and a support frame is fixedly installed on the bottom of the storage tank. A mixing guide is used to discharge and mix nutrients within the storage tank. A filter assembly is used to filter impurities in the drip irrigation solution. In this drip irrigation device for sandy soil potato cultivation, liquid is injected into a layered hood through the guide pipe. The filter pipe inside the layered hood further filters the liquid, allowing the filtered liquid to flow from the outlet into the delivery pipe. This facilitates the removal of impurities from the liquid during delivery, reducing the impurity content and preventing scaling in the pipes over long-term operation, which could lead to blockages in the plastic pipes during drip irrigation.

The utility model relates to the technical field of side slope drainage, in particular to a water seepage blind pipe suitable for an existing side slope, and when underground water seeps into the water seepage blind pipe, water firstly enters the pipe through drainage holes in the side wall of a supporting pipe. The supporting pipe is made of a hard material and plays a role in supporting and protecting an internal filtering system. Compared with a plastic pipeline which is directly arranged in the supporting pipe and provided with holes, the woven filtering pipe has the advantages that the gap structure is more complex and fine, impurities such as fine soil particles in underground water can be more effectively intercepted, the filtering precision and the drainage quality are improved, and the woven structure has certain elasticity and flexibility, so that the filtering effect is better. And the pressure change and tiny deformation in the slope body can be better adapted, breakage or damage is avoided, and a certain water passing capacity can be kept even if part of the slope body is blocked. The method can be widely applied to the technical field of slope drainage.

The utility model provides a plastic pipeline connector. The plastic pipeline connector comprises a connector body and a locking sleeve. The connector body is provided with a butt joint part and a first connecting part in the axial direction, the butt joint part is of a tubular structure, the outer diameter of the butt joint part is gradually decreased in the direction away from the first connecting part, and the outer wall of the butt joint part is sleeved with the plastic pipeline. A locking part and a second connecting part are arranged on the locking sleeve side by side in the axial direction, the locking part is of a tubular structure, the inner diameter of the locking part is gradually reduced in the direction away from the second connecting part, the locking part is arranged on the plastic pipeline in a sleeving mode and can move along the central axis of the plastic pipeline, and when the locking part moves towards the butt joint part, the plastic pipeline can be clamped; the second connecting part is connected with the first connecting part, the clamping state of the plastic pipeline is kept, sealing butt joint of the pipeline is achieved, and reliability and convenience are achieved.

This invention provides a flattening device for the ends of heating plastic pipes, applicable to the field of plastic pipe flattening processing equipment. The device includes: a support mechanism, divided into a main frame and a secondary frame; a pipe clamping mechanism for clamping and fixing the bent portion of the plastic pipe; a tail-end positioning mechanism for providing auxiliary support and positioning for the end of the plastic pipe furthest from the flattening end; an inner mold for extending into the flattening end and applying a compressive force to its inner wall; an outer mold, corresponding to the inner mold, for applying a compressive force to the outer wall of the flattening end; and a flattening drive mechanism, connected to both the inner and outer molds, for driving the inner and outer molds to achieve either mating compression or separation and resetting. This invention, through the corresponding mating of the outer and inner molds, applies a compressive force to the outer wall of the flattening end, ensuring that the flattening process meets design requirements, achieving high flattening accuracy, and facilitating convenient and efficient demolding from the narrow-mouth flattening end.

The utility model relates to the technical field of lifting of plastic pipelines and pipe fittings, and discloses a vertical transportation lifting appliance for pipelines and pipe fittings, which comprises a lifting beam, a lifting lug for mounting a lifting tool is arranged at the end part of the lifting beam, a clamping plate is arranged at one end, far away from the lifting lug, of the lifting beam, and a mounting clamping groove is formed between the clamping plate and the bottom of the lifting beam; according to the utility model, a mounting position can be provided for the chain block, and a working site can be flexibly moved and adjusted according to hoisting requirements, so that the tedious operation of frequently dismounting and mounting the chain block is avoided, the labor intensity is effectively reduced, and the working efficiency is improved.

A restrained pipe joining system for plastic pipe is shown comprising male and female pipe ends, the male pipe end having an external circumferential groove and the female pipe end having an internal recess which contains a circumferential casing element, the casing element receives a non-circular click fit restraint ring which engages the external circumferential groove of the male pipe end during the make-up of the pipe ends to form a sealed and restrained pipe joint.

The utility model discloses a guiding device for plastic pipeline production, solves the problems that an existing guiding device is low in adjusting precision and prone to damaging the surface of a pipe, and provides the guiding device for plastic pipeline production. Comprising a base, a vertical guide assembly, a three-axis adjusting sliding table and a horizontal guide assembly. An upper guide wheel of the vertical guide assembly is driven by a screw hand wheel to ascend and descend, a three-axis sliding table of the horizontal guide assembly synchronously adjusts the positions of a roller and the vertical guide wheel, and the roller is distributed in a triangular shape to stably support a pipe. The guide wheel is of a conical structure and is provided with V-shaped anti-skid lines and a rubber buffer layer, and the roller is made of a polished stainless steel material; the screw hand wheel and the connecting block are in floating fit to compensate installation errors. The device realizes vertical and horizontal multi-directional accurate adjustment, prevents pipe slippage and surface damage, improves the production efficiency and the qualified rate of finished products, and is suitable for high-speed continuous production scenes.

The invention discloses a heat treatment production line for plastic pipeline processing, belongs to the technical field of plastic pipeline heat treatment, and aims to solve the problems that plastic particles are easily clamped between a spiral blade and the inner wall of a conveyor shell, the inner wall of the conveyor shell is abraded, and conveying is affected. A controller is arranged on one side of the supporting frame, a conveying assembly is arranged in the supporting frame, an air suction pressurization assembly is arranged in the supporting frame, the air suction pressurization assembly is connected with the conveying assembly, one side of the air suction pressurization assembly communicates with an air injection assembly, and the air injection assembly communicates with the conveying assembly. Circulating air suction and pressurization are achieved through conveying rotation kinetic energy, an independent air pump is not needed, space and energy consumption are saved, pressure is continuously supplied to the air injection assembly, a stable air wall is formed in a gap between the air injection assembly and the air injection assembly, and the clamping stagnation preventing effect is enhanced.

The invention relates to the technical field of plastic product processing, and discloses hot melting equipment for plastic pipeline processing, which comprises a moving mechanism, a support adjusting mechanism and a cleaning heating mechanism, the moving mechanism is used for moving a pipeline, the support adjusting mechanism is connected to the moving mechanism, the support adjusting mechanism is used for supporting the pipeline and can move the pipeline, and the cleaning heating mechanism is used for cleaning the pipeline. And the cleaning and heating mechanism is arranged corresponding to the moving mechanism, the cleaning and heating mechanism can ascend and descend, and in the process that the moving mechanism drives the pipeline to move, the cleaning and heating mechanism is used for cleaning an end opening of the pipeline. In the process that the supporting and adjusting mechanism drives the pipeline to move, the cleaning and heating mechanism is used for conducting hot melting on a pipeline port. According to the hot melting connection device, cleaning treatment at the connecting port is completed in the pipeline conveying process, impurities at the connecting port of the pipeline are removed, the impurities are prevented from affecting hot melting connection, and therefore the quality of hot melting connection is improved.

The utility model relates to the technical field of pipe joints, and discloses a metal expansion repair plastic short pipe joint which comprises a pressure-bearing ring and connecting pipes fixedly connected to the two sides of the pressure-bearing ring, the diameter of the inner wall of the pressure-bearing ring is equal to that of the inner wall of the two connecting pipes, and expansion assemblies are arranged on the outer walls of the ends, away from the pressure-bearing ring, of the two connecting pipes. And the expansion assembly is used for elastically expanding and fixing the end part of the plastic pipeline towards the outer side. According to the metal expansion repair plastic short pipe joint, the expansion assembly is arranged on the outer side of the connecting pipe, when the connecting pipe is inserted into the plastic pipe, the end of the plastic pipe can be supported through the expansion assembly, the plastic pipe tightly holds the iron joint according to the elasticity principle of plastic, and the sealing effect is improved.

Computer-implemented method and system for assessing a non-destructive ultrasonic test on a plastic pipe weld, including:receiving an ultrasound scan file by way of a server,a computing unit analyzing the ultrasound scan file based on predefined criteria, wherein the computing unit comprises a neural network,the computing unit assessing the ultrasound scan file based on the predefined criteria.

The invention provides a plastic pipeline extrusion molding traction device which comprises a traction working chamber, a lower rolling supporting assembly is fixedly installed at the bottom end in the traction working chamber, a driving traction assembly is further arranged in the traction working chamber and comprises a traction table, and a traction belt is in transmission connection with the surface of the traction table. A plurality of rubber traction blocks are arranged on the surface of the traction belt, and an air cooling assembly is further arranged on the traction table. A dynamic air cooling structure moving along with the traction belt is constructed by arranging the rubber sealing belt moving synchronously with the traction block and cooperating with the fixed vent groove. Cooling air can flow through each heat dissipation base and traction block in a moving state, active cooling of the traction blocks at multiple positions is achieved, and cooling is uniform and efficient.

The invention provides a heating plastic pipeline port flattening device, which is applied to the technical field of plastic pipe flattening processing equipment, and comprises a supporting mechanism, a flattening mechanism and a flattening mechanism, the pipeline clamping mechanism is used for clamping and fixing the bent part of the plastic pipe; the tail end positioning mechanism is used for carrying out auxiliary supporting and positioning on the end part, far away from the flattened end, of the plastic pipe; the inner die is used for extending into the flattened end and applying extrusion acting force to the inner wall of the flattened end; the outer mold is correspondingly matched with the inner mold inside and outside and is used for applying extrusion acting force to the outer wall of the flattened end; and the flattening driving mechanism is in transmission connection with the inner mold and the outer mold and is used for driving the inner mold and the outer mold to realize involution extrusion or separation reset. The outer mold and the inner mold are correspondingly matched inside and outside and are used for applying extrusion acting force to the outer wall of the flattened end, it is ensured that flattening forming meets the design requirement, flattening precision is high, and demolding from the flattened end with a narrow opening is convenient and efficient.

The utility model discloses an injection molding device for plastic pipeline joint, which comprises a first base, a second base, a mould system, an injection molding system, a moving system and a control system, the second base is arranged on one side of the first base, the mould system is arranged on one side of the first base, and the injection molding system is arranged on the other side of the first base. The injection molding system is matched with the mold system, the moving system is installed on the second base and used for moving the plastic pipeline, and the control system is used for controlling the mold system, the injection molding system and the moving system. According to the utility model, the automatic production of the plastic pipeline joint is realized, the production efficiency is greatly improved, meanwhile, the stability of the injection molding process and the consistency of the product quality are ensured through the accurate control of the control system, the error caused by manual operation is reduced, and the sealing performance and the reliability of the plastic pipeline joint are improved.

The invention relates to the technical field of plastic pipeline connection technologies, in particular to a large-diameter extrusion-method electric melting pipe fitting and a manufacturing method thereof.The large-diameter extrusion-method electric melting pipe fitting comprises a mounting component, the mounting component comprises a supporting frame, a fixed frame is fixedly connected to one side of the supporting frame, a fixed pipe is fixedly connected to one side of the fixed frame, and a movable pipe is arranged on one side of the fixed pipe; a lining pipe is arranged between the fixed pipe and the movable pipe; the moving part comprises a driving assembly arranged on one side of the supporting frame and used for moving the movable pipe and an installing assembly arranged between the lining pipe and the movable pipe and used for installing the lining pipe, and through material selection optimization and structural design, the pipe fitting can meet the connecting requirements of pipes of different brands and different batches; and meanwhile, good performance can be kept under special working conditions such as high pressure, high temperature and strong corrosion, the application range of the product is widened, meanwhile, the method can be used for producing electric smelting pipe fittings of different sizes, and the applicability of electric smelting pipe fitting production equipment can be improved.

The utility model discloses a plastic pipeline extrusion cooling forming device which comprises a shell, a partition plate is fixedly connected to the middle of an inner cavity of the shell, a through conveying hole is formed in the middle of the shell and the partition plate, a cooling mechanism is installed at the upper end of the inner cavity of the shell, and the partition plate is provided with an installation opening matched with the cooling mechanism. The conveying mechanism is installed on the right side of the shell, the conveying mechanism is installed on the outer surface of the conveying hole, the grinding mechanism is installed at the upper end of the right side of an inner cavity of the shell, and a plastic pipe entering the conveying hole is conveniently cooled through the cooling mechanism, so that the plastic pipe is cooled and formed; according to the plastic pipe cooling device, cooling forming is convenient to convey, it is ensured that the plastic pipe is normally cooled and used by the device, the outer surface of the cooled plastic pipe is convenient to polish through the polishing mechanism, and water sprayed by the cooling mechanism is convenient to filter through the filtering mechanism.

The utility model provides a simple structure for protecting a shallowly-buried plastic pipeline under an urban road, which comprises a groove, the section of the groove is trapezoidal, platforms for digging the groove are arranged on two sides of the groove along the radial direction, a foundation bed, a backfill layer and an overburden layer are sequentially arranged in the groove from bottom to top, a plastic pipe is arranged on the foundation bed, and the backfill layer is arranged on the plastic pipe. The backfilling layer is arranged in the backfilling layer; and the pressure-resistant plates are laid above the plastic pipes side by side, and the two ends of the pressure-resistant plates are fixed to the platform and located in the backfill layer. According to the construction structure of laying the pressure-resistant plate above the pipeline, in the daily construction process, the process is simple and rapid, the engineering construction difficulty is low, the engineering amount is saved, the construction efficiency is improved, and the engineering investment is saved; according to the simple structure, the application scene and range of shallow burying construction of the municipal pipe network plastic pipeline are enlarged, rapid construction and rapid recovery can be achieved, and safety accidents caused by large burying depth of the pipeline and too deep trench excavation construction are reduced.

The invention relates to the technical field of pipeline processing, in particular to a cooling device for plastic pipeline processing, which comprises a spray cooling box, a primary water inlet branch pipe and a pipeline driven to move in the spray cooling box, and further comprises a spray mechanism arranged on the primary water inlet branch pipe and used for supporting the pipeline and performing spray cooling on the pipeline; and the center distance adjusting mechanism is arranged at the end part of the first-stage water inlet branch pipe and is used for adjusting the positions of the first-stage water inlet branch pipe and the spraying mechanism. The positions of the spraying mechanisms are adjusted through the center distance adjusting mechanism according to the diameter of the pipeline, so that the multiple spraying mechanisms in the spraying cooling box abut against the exterior of the pipeline, stable supporting during pipeline conveying is achieved, meanwhile, the distance between the spraying mechanisms and the outer surfaces of the pipelines with different diameters is always constant, and the conveying efficiency is improved. And it is guaranteed that cooling water sprayed out in a scattering mode can completely act on the surface of the pipeline, and waste of the cooling water is avoided.