Production process and production equipment of a socket polyethylene pipe

Abstract

The application discloses a production process and production equipment of a socket and spigot type polyethylene pipeline, and the process comprises the following steps: extruding through an extruder, shaping the pipeline after a forming die and a sizing sleeve, and injecting a socket part through an injection molding machine; the pipeline is sprayed and cooled through a water cooling spraying mechanism; the socket part is installed on a lathe through a supporting tool to groove the inside, a sealing ring is installed in the grooved pipeline, the pipeline is marked through a marking machine, and the pipeline is pulled through a pulling machine; the pipeline is cut to a fixed length after marking, and the end of the pipeline is chamfered through a chamfering machine; the production equipment comprises the extruder, the forming die, the sizing sleeve, the water cooling spraying mechanism, the pulling machine, the cutting machine, the chamfering machine and an automatic hot melting welding machine, the socket part and the polyethylene pipeline are simultaneously processed, the non-stop production of the socket and spigot type pipeline is ensured, and the production efficiency of the socket and spigot type pipeline is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyethylene pipeline processing, in particular to a production process and production equipment of a socket type polyethylene pipeline. BACKGROUND

[0002] The raw material of the PE pipeline is polyethylene, which is a high molecular weight organic synthetic material. The PE pipeline is mainly used in municipal tap water supply, water diversion, water treatment engineering, rural healthy drinking water engineering, pipeline system for water supply inside and outside buildings, pipeline system for repairing old pipelines and water treatment engineering, garden irrigation and other industrial water pipes. In order to avoid the trouble of pipeline installation, the sealing performance is not high, and the stability of the pipeline connection is not high, therefore, a socket type polyethylene pipeline is designed. In the patent No. 2020217685967, a polyethylene pipeline with a socket has been disclosed. The socket is welded on one end of the pipeline body. A recess adapted to the pipeline body is arranged on the socket. When the pipeline body is connected, only the end without the socket is inserted into the recess, and the pipeline connection is completed, which is simple and convenient, and saves assembly time.

[0003] In the patent No. 2021112313721, a production process of a polyethylene outer protective pipe for a heat preservation pipeline is disclosed. After the outer protective pipe enters the cooling and shaping, the shaped outer protective pipe is cut by a progressive rotary cutting method, which effectively prevents the problems of more port burrs and cutting deformation in the cutting process. However, the socket type polyethylene pipeline needs to be chamfered during processing, but the above process does not disclose the chamfering. The purpose of chamfering is to facilitate the insertion of the socket end and make the pipe body and the socket component fit more closely. SUMMARY

[0004] The purpose of the present application is to provide a production process and production equipment of a socket type polyethylene pipeline, which solves the following technical problems: online chamfering of the polyethylene pipeline and connection of the chamfered pipeline with the socket component or socket head, and realizes continuous production of socket type pipelines of different sizes without stopping, thereby improving the production efficiency of the socket type polyethylene pipeline.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A production process of a socket type polyethylene pipeline, characterized in that it comprises the following steps: step one, drying the polyethylene raw material and adding it to an extruder and an injection molding machine respectively, extruding through the extruder, shaping the pipeline through a molding die and a sizing sleeve, and injecting the socket component through the injection molding machine;

[0007] Step two, the pipe shaped by the sizing sleeve is sprayed and cooled by a water cooling spraying mechanism; meanwhile, the support tool is used to install the socket component on the lathe to groove the interior of the socket component, and after the grooving is completed, the sealing ring is installed in the machined groove;

[0008] Step three, the cooled and shaped pipe is marked by a marking machine and is pulled by a pulling machine;

[0009] Step four, the marked pipe is cut to a fixed length, and one end or both ends of the pipe are chamfered by a chamfering machine for standby;

[0010] Step five, the chamfered pipe and the socket component are hot melt welded by a polyethylene pipe of an automatic hot melt welding machine to form a socket polyethylene pipe, and the turned edge generated on the inner wall of the welding position of the pipe and the socket component is trimmed to keep the inner wall of the pipe smooth, and the production of the socket polyethylene pipe is completed.

[0011] The application also provides a production equipment for producing a socket polyethylene pipe, characterized in that the production equipment sequentially comprises an extruder, a forming die, a sizing sleeve, a water cooling spraying mechanism, a pulling machine, a cutting machine, a chamfering machine and an automatic hot melt welding machine.

[0012] Further, the chamfering machine further comprises slide columns arranged on both sides of the base and a protective cover movably connected with the slide columns.

[0013] Further, the chamfering machine further comprises a lifting platform for carrying the chamfering machine, the base is further provided with a sliding block, the lifting platform is provided with a sliding rail matched with the sliding block, a lead screw sleeve is further arranged on the sliding block, and a servo motor is further arranged on the lifting platform.

[0014] Further, the chamfering machine is a box-type chamfering machine instead of a rack-type chamfering machine.

[0015] Further, the box type chamfering machine comprises a box body, chamfering mechanisms are installed at one end or both ends of the box body, a clamping mechanism is further installed in the middle of the box body, and collecting grooves are arranged at both sides of the box body and below the chamfering mechanisms; the chamfering mechanism comprises a middle disc, a plurality of fixed air cylinders are installed at equal distances on the outer circumferential surface of the middle disc, the piston rod end of the fixed air cylinder is connected with the box body, a driving gear is arranged on the middle disc, and the driving gear is driven by a motor; an outer pipe is rotatably connected to the middle disc, a tooth ring is sleeved on the outer circumferential surface of the outer pipe close to the middle disc, the tooth ring is in meshing connection with the driving gear, and a plurality of chamfering cutters are arranged in an array on the inner wall of the outer pipe.

[0016] Further, the outer pipe is a hollow structure, an inner pipe is rotatably connected inside the outer pipe, and teeth are arranged on the outer circumferential surface of the inner pipe; a notch is formed in the outer wall of the outer pipe, an adjusting motor is installed in the notch, an adjusting gear is fixedly installed on the output shaft of the adjusting motor, and the adjusting gear is in meshing connection with the teeth.

[0017] Further, a plurality of wedge blocks II are installed at equal distances on the inner wall of the inner pipe, the wedge blocks II are matched with the wedge blocks I, a guide column is arranged at the bottom center of the wedge blocks I, the guide column penetrates through the inner pipe and is connected with the chamfering cutters, a spring I is sleeved on the guide column, and a plurality of limiting blocks are arranged at equal distances on the middle disc and matched with the wedge blocks II.

[0018] Further, the clamping mechanism comprises a through pipe, a trapezoidal pipe is fixedly installed at one end of the through pipe, a movable ring is sleeved on the trapezoidal pipe, a movable push plate is fixedly installed on the movable ring, a movable push rod is fixedly installed at the top center of the movable push plate, the top of the movable push rod penetrates through the box body and is connected with a movable air cylinder, and the movable air cylinder is movably installed on the box body; a plurality of inclined protruding blocks are installed at equal distances on the inner wall of the trapezoidal pipe, a guide hole is formed in the protruding blocks, and a movable clamp is clamped on the protruding blocks.

[0019] Further, an inclined groove matched with the protruding blocks is formed in the movable clamp, a sliding groove is formed in the inclined groove, one end of the movable clamp is connected with the inner wall of the trapezoidal pipe through a spring sheet, a clamping arc-shaped groove is formed in the movable clamp, and a plurality of clamping arc-shaped grooves form a circle; a plurality of movable guide rods are installed at equal distances on the inner wall of the movable ring, the movable guide rods are connected with movable pin shafts penetrating through the guide holes, a spring II is sleeved on the movable guide rods, and the movable pin shafts are matched with the sliding grooves.

[0020] The beneficial effects of the present application are as follows:

[0021] (1) the present application, by socket parts with polyethylene pipeline processing production at the same time, so as to ensure the socket pipe production without stopping, avoid pipe production after the socket parts or socket parts first production after waiting for pipe, further improve the socket pipe production efficiency;

[0022] (2) by adopting frame chamfering machine in realizing online chamfering, its protective cover can play a protective role, prevent the production line worker is hurt by work in the carousel or chamfering knife, further achieve a kind of safety performance;

[0023] (3) by installing the slider compatible with the slide rail on the base, so that the frame chamfering machine can move left and right on the lifting platform, combined with the lifting platform driving the frame chamfering machine up and down, further realize the adjustment of the frame chamfering machine, so as to make the frame chamfering machine and polyethylene pipe on the same center line, so as to adapt to different caliber polyethylene pipe chamfering.And adopt the installation of lead screw sleeve on the slider, facilitate the connection of lead screw with servo motor, further realize the use of servo motor instead of artificial to push the frame chamfering machine left and right on the lifting platform, provide work efficiency.

[0024] (4) the present application is through the setting of box type chamfering mechanism, the structure is convenient for cutting chamfering of the two ends of different diameter pipes, and chamfering can be carried out after cutting, without transporting the pipe, more time-saving and labor-saving, high degree of automation.Simultaneously through driving telescopic cylinder, push cutter rotates a certain angle, it is convenient to adjust the angle of cutting chamfering, strong applicability.

[0025] (5) through the setting of clamping mechanism, ensure that the pipe is stable during cutting chamfering process, cutting effect is better, at the same time, the clamping mechanism can clamp pipes of different diameters, strong applicability. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in conjunction with the drawings.

[0027] Figure 1 is the process flow diagram of the present application;

[0028] Figure 2 is the layout diagram of the production equipment of the present application;

[0029] Figure 3 is the structure diagram of the frame chamfering machine of the present application;

[0030] Figure 4 is the local structure diagram of the frame chamfering machine of the present application;

[0031] Figure 5 is another local structure diagram of the frame chamfering machine of the present application;

[0032] Figure 6 This is a structural diagram of the combination of a frame-type chamfering machine and a lifting platform of the present invention;

[0033] Figure 7 It is a partial structural schematic diagram of the frame type chamfering machine of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the box-type chamfering machine of the present invention;

[0035] Figure 9 It is a structural schematic diagram of the chamfering mechanism of the box-type chamfering machine of the present invention;

[0036] Figure 10 It is a schematic diagram of the overall structure of the inner tube of the present invention;

[0037] Figure 11 It is a schematic diagram of the overall structure of the outer tube of the present invention;

[0038] Figure 12 2 is a schematic diagram of the overall structure of a chamfering tool according to embodiment 2 of the present invention;

[0039] Figure 13 It is a schematic diagram of the overall structure of the clamping mechanism of the present invention;

[0040] Figure 14 Schematic diagram of the overall internal structure of the trapezoidal tube of the present invention;

[0041] Figure 15 1 is a schematic side view of the trapezoidal tube of the present invention;

[0042] Figure 16 This is a schematic diagram of the socket component support tooling structure of the present invention;

[0043] Figure 17 This is a schematic diagram of the overall structure of the three-jaw chuck of the present invention

[0044] Figure 18 Schematic diagram of the socket component structure;

[0045] Figure 19 Schematic diagram of the socket-and-spigot pipe structure. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] The production process of a spigot-and-socket polyethylene pipe of the present invention is characterized by comprising the following steps:

[0048] (1), the polyethylene raw material is dried and added into the extruder and injection molding machine respectively, extruded through the extruder, shaped through the forming die and sizing sleeve, and the pipe is shaped, and the socket part is injection molded;

[0049] (2), the pipe shaped through the sizing sleeve is sprayed and cooled through the water cooling spraying mechanism; at the same time, the socket part is installed on the lathe by the supporting tool to groove the inside of the socket part, and the sealing ring is installed in the grooved groove after the grooving is completed;

[0050] (3), the cooled and shaped pipe is marked by the marking machine and is pulled out to the cutting machine by the traction machine;

[0051] (4), the marked pipe is cut to a fixed length, and the end or both ends are chamfered by the chamfering machine;

[0052] (5), the chamfered pipe and the socket part are hot melt welded by the polyethylene pipe of the automatic hot melt welding machine, a socket polyethylene pipe is formed, the flange generated on the inner wall of the welding part of the pipe and the socket part is trimmed to keep the inner wall of the pipe smooth, and the production of the socket polyethylene pipe is completed.

[0053] Among them, the supporting part includes a plurality of clamping claws 021 matched with the three-jaw chuck, a supporting plate 022 connected with the clamping claws, one supporting plate 022 connected with each of the three clamping claws 021, and the combination of the supporting plates and the supporting plate 022 constitutes a socket part supporting body, and the supporting plate is provided with a limiting table 023 and a rough surface 024; when applied, the clamping claws 021 connected with the supporting plate 022 are installed on the chuck, the small end of the socket part is sleeved on the supporting body composed of the supporting plate 022, then a wrench is inserted into the chuck and rotated, the clamping claws move outward, the clamping claws move outward and the supporting plate tightly abuts against the inner wall of the socket part, so that the socket part is tightly expanded on the supporting body, and falling off during processing is avoided. The limiting table is used for limiting to prevent the socket part from being not installed in place, and the rough surface is used for increasing the friction between the supporting plate and the inner wall of the socket part, so that the clamping is more tightly.

[0054] In addition, a multi-automatic feeding and discharging mechanical arm can be arranged between the injection molding machine and the lathe, the mechanical arm takes out the socket part from the injection molding machine and clamps it on the supporting part on the lathe after the injection molding machine completes the injection molding, the lathe works to process the groove for placing the sealing ring, and the sealing ring is manually installed in the groove after the processing is completed;

[0055] The production equipment of the application comprises, in sequence, an extruder 1, a forming die 2, a sizing sleeve 2, a water-cooling spraying mechanism 4, a traction machine 5, a cutting machine 6, a chamfering machine 7, an automatic hot-melt welding machine 8, an injection molding machine 01 and a lathe 02; the chamfering machine 7 is a rack-type chamfering machine, which comprises a base 9, a driving motor 91 mounted on the base 9, an air pump 92, a plurality of lifting air cylinders 93 connected with the air pump through pipelines, and a pipe material positioning part; the driving motor 91 is connected with a turntable 94 through a transmission shaft, and the turntable 94 is adjustably mounted with a chamfering cutter 95; the pipe material positioning part comprises a lower positioning part 96 mounted on the base 9, an upper positioning part 97 connected with the lower positioning part 96 and the lifting air cylinders 93, and a guide column 98 connected between the lower positioning part 96 and the upper positioning part 97.

[0056] The rack-type chamfering machine further comprises slide columns 99 arranged on both sides of the base 9 and a protective cover 100 movably connected with the slide columns 98;

[0057] Further comprising a lifting platform 11 for carrying the rack-type chamfering machine; the base 9 is further provided with a sliding block 901; the lifting platform 11 is provided with a sliding rail 111 matched with the sliding block 901; a lead screw sleeve 902 is further mounted on the sliding block 901; a servo motor 112 is further mounted on the lifting platform 11; and the servo motor 112 is connected with a lead screw; the lead screw sleeve and the lead screw are in sliding fit, so that the servo motor 112 drives the lead screw sleeve 902 to move the rack-type chamfering machine on the lifting platform 11, thereby adjusting the center of pipe materials of different sizes and ensuring the chamfering precision.

[0058] The chamfering machine adopts a box-type chamfering machine instead of a rack-type chamfering machine.

[0059] The box chamfering machine comprises a box body 71, chamfering mechanisms 72 are installed at one end or both ends of the box body 71, a clamping mechanism 73 is further installed in the middle of the box body 71, and collecting grooves 711 are arranged at both sides of the box body 71 and below the chamfering mechanisms 72; the chamfering mechanism 72 comprises a middle disc 721, a plurality of fixed air cylinders 723 are installed at equal distances on the outer circumferential surface of the middle disc 721, the piston rod end of the fixed air cylinder 723 is connected with the box body 71, a driving gear 722 is arranged on the middle disc 721, and the driving gear 722 is driven by a motor; an outer pipe 725 is rotationally connected to the middle disc 721, a tooth ring 724 is sleeved on the outer circumferential surface of the outer pipe 725 close to the middle disc 721, the tooth ring 724 is in meshing connection with the driving gear 722, and a plurality of chamfering cutters 7212 are arranged in an array on the inner wall of the outer pipe 725. The outer pipe 725 is of a hollow structure, an inner pipe 726 is rotationally connected to the inside of the outer pipe 725, and teeth 727 are arranged on the outer circumferential surface of the inner pipe 726; a notch is formed in the outer wall of the outer pipe 725, an adjusting motor 728 is installed in the notch, an adjusting gear 729 is fixedly installed on the output shaft of the adjusting motor 728, and the adjusting gear 729 is in meshing connection with the teeth 727. The driving adjusting motor 728 drives the adjusting gear 729 to rotate, then the inner pipe 726 is driven to rotate through the teeth 727, then the wedge block two 7214 is driven to move, the wedge block two 7214 is in contact with the wedge block one 7210, the chamfering cutter 7212 is driven to move through the guide column 7211, then the circumferential diameter formed by the plurality of chamfering cutters 7212 is adjusted, different diameters of pipelines can be conveniently applied, and then, after chamfering, the chamfering cutter 7212 is reset through the spring one 7213, and the pipeline can pass through conveniently.

[0060] The inner wall of the inner tube 726 is provided with a plurality of wedge blocks two 7214 at equal intervals, the wedge blocks two 7214 are matched with the wedge blocks one 7210, the bottom center of the wedge blocks one 7210 is provided with a guide column 7211, the guide column 7211 penetrates the inner tube 726 and is connected with a chamfer cutter 7212, a spring one 7213 is sleeved on the guide column 7211, a plurality of limiting blocks 7251 are provided on the middle through disc 721 at equal intervals, the limiting blocks 7251 are matched with the wedge blocks two 7214, so as to limit the wedge blocks two 7214. One end of the spring one 7213 is connected with the wedge blocks one 7210, and the other end is connected with the outer tube 725, so as to drive the wedge blocks one 7210 to reset. The clamping mechanism 73 comprises a through pipe 731, one end of the through pipe 731 is fixedly provided with a trapezoidal pipe 732, the trapezoidal pipe 732 is sleeved with a movable ring 733, the movable ring 733 is fixedly provided with a movable push plate 734, the top center of the movable push plate 734 is fixedly provided with a movable push rod 735, the top of the movable push rod 735 is connected with a movable cylinder 736 through the box 71, and the movable cylinder 735 is movably arranged on the box 71; a plurality of inclined protruding blocks 7321 are provided on the inner wall of the trapezoidal pipe 732 at equal intervals, guide holes 7322 are formed in the protruding blocks 7321, and movable clamps 737 are clamped on the protruding blocks 7321.

[0061] An inclined groove 738 is formed in the movable clamp 737 and matched with the protruding blocks 7321, a sliding groove 7380 is formed in the inclined groove 738, one end of the movable clamp 737 is connected with the inner wall of the trapezoidal pipe 732 through a spring sheet, a clamping arc-shaped groove 739 is formed in the movable clamp 737, and a plurality of clamping arc-shaped grooves 739 form a circle; a plurality of movable guide rods 7331 are provided on the inner wall of the movable ring 733 at equal intervals, the movable guide rods 7331 penetrate the guide holes 7322 and are connected with movable pin shafts 7323, a spring two 7312 is sleeved on the movable guide rods 7313, and the movable pin shafts 7323 are matched with the sliding grooves 7380.

[0062] The support component comprises several clamping claws 021 matched with the three-jaw chuck, support plates 022 connected with the clamping claws, one support plate 022 connected with each of the three clamping claws 021, and the combination of the support plates and the support plates 022 forming a support body of the socket component. A limiting table 023 and a rough surface 024 are arranged on the support plate. In application, the clamping claws 021 connected with the support plates 022 are installed on the chuck, the small end of the socket component is sleeved on the support body composed of the support plates 022, then a wrench is inserted into the chuck and rotated, the clamping claws move outward, the clamping claws move outward and the support plates are tightly combined with the inner wall of the socket component, so that the socket component is tightly expanded on the support body, avoiding falling off during processing. The limiting table is used for limiting, preventing the socket component from being not installed in place, and the rough surface is used for increasing the friction between the support plate and the inner wall of the socket component, so that the clamping is more tightly. Through the arrangement of the support component, the inner wall of the polyethylene pipeline with the socket of different diameters is easily grooved, the sealing ring 03 is put into the groove after the grooving is completed, the position of the just-grooved is heated and expanded due to the friction generated during processing, the sealing ring is immediately installed after the processing is completed, through the principle of thermal expansion and cold contraction, the sealing ring 8 is installed in the groove, after cooling, the sealing ring is fixed in the groove and is not easy to fall off, and the sealing effect can be improved. Example one

[0063] After the polyethylene raw material is dried, it is respectively added into an extruder and an injection molding machine, is extruded through the extruder, is shaped into a pipeline after a forming die and a sizing sleeve, and is injection molded into a socket component through the injection molding machine;

[0064] In step two, the pipeline shaped through the sizing sleeve is sprayed and cooled through a water cooling spraying mechanism; meanwhile, the socket component is installed on a support body composed of a plurality of support plates 022, then a wrench is inserted into the chuck and rotated, the clamping claws 021 move outward on the three-jaw chuck, the clamping claws 021 move outward and the support plates 022 are tightly combined with the inner wall of the socket component, so that the socket component is tightly expanded on the support body, avoiding falling off during processing, the inside of the socket component is grooved after the clamping is completed, and the sealing ring is installed in the processed groove after the grooving is completed;

[0065] In step three, the cooled and shaped pipeline is marked through a marking machine and is pulled through a pulling machine.

[0066] In step four, the pipeline is conveyed to cutting through the pulling machine, the marked pipeline is cut to a fixed length, and the end of the pipeline is chamfered through a chamfering machine.

[0067] In step five, the chamfered pipeline and the socket component are hot melt welded through the polyethylene pipeline of an automatic hot melt welding machine, a socket type polyethylene pipeline is formed, the inner wall of the welding position of the pipeline and the socket component is trimmed, the inner wall of the pipeline is kept smooth, and the production of the socket type polyethylene pipeline is completed.

[0068] The chamfering machine used in this embodiment is a rack type chamfering machine. When chamfering, the lifting cylinder 93 is supplied with air source through the air pump 92, so that the lifting cylinder 93 drives the upper positioning part 97 to rise, and the pipe enters the lower positioning part 96. After the pipe reaches the specified position, the lifting cylinder 93 descends, driving the upper positioning part 97 to descend, so that the upper positioning part 97 and the lower positioning part 96 cooperate to clamp the pipe between the upper positioning part 97 and the lower positioning part 96. Then the protective cover is moved under the action of the pushing force, and the protective cover guide sleeve 100 connected with the protective cover moves along the slide column 98 in the direction of the upper positioning part and the lower positioning part, so that the protective cover shields the space or gap at the rotating disc to prevent the rotating disc from hurting the worker when rotating. After the protective cover is in place, the driving motor 91 is started to rotate the rotating disc 94 driven by the driving motor, and the rotating disc drives the chamfering cutter 95 to rotate, thereby chamfering the pipe. After chamfering is completed, the next process is entered.

[0069] If a production line can produce multiple pipes with different diameters, in order to adapt the chamfering machine to different diameter pipes, a sliding block 901 is installed on the base 9, and a sliding rail 111 is arranged on the lifting platform 11. The sliding block 901 is adapted to the sliding rail 111, so that it can move left and right on the lifting platform 11. When the rack type chamfering machine moves on the lifting platform 11, it can be manually pushed, or the servo motor 112 drives the lead screw to rotate, so that the lead screw sleeve 902 connected with the lead screw moves left and right on the lead screw, thereby driving the sliding block 901 to move left and right on the sliding rail 111, and further driving the rack type chamfering machine to move on the lifting platform 11. At the same time, the lifting mechanism (hydraulic cylinder or air cylinder or electric push rod) of the lifting platform 11 drives the platform to rise or descend, so as to adjust the center of the rack type chamfering machine to be on the same center line as the pipes of various specifications. After adjustment, the above-mentioned chamfering work can be entered. Embodiment Two

[0070] The difference between this embodiment and embodiment one is that the chamfering machine adopts a box type chamfering machine. When the box type chamfering machine is applied, the pipe after being marked and cut is sent to the pipe support and into the box 71, and then is sent to the right box type chamfering mechanism 72, and then the movable cylinder 42 pushes the movable push rod 43 to move, and then the movable push plate 46 drives the movable ring 44 to move, and then the guide rod 413 and the movable pin shaft 411 slide, and the movable clamp 47 moves inward, and then the pipe is clamped. The structure is convenient for clamping pipes of different diameters. After the pipe is clamped, the motor drives the driving gear 22 to work, the driving gear 22 drives the gear ring 24 to rotate, the gear ring 24 drives the outer pipe 25 to rotate, the outer pipe 25 drives the chamfering tool 7212 to rotate, and then the fixed cylinder 23 is driven to move the middle disc 21, and then the chamfering tool 7212 chamfers the pipe. After chamfering is completed, the pipe is continuously conveyed, and the pipe is conveyed to the automatic hot melt welding to be hot melt welded with the socket part. The left box type chamfering mechanism 2 chamfers the other end of the pipe. The structure is convenient for cutting and chamfering both ends of the pipe, and chamfering can be performed after cutting without the need to move the pipe, which is more time-saving and labor-saving and has high automation.

[0071] In addition, the chamfering tool 7212 in the embodiment includes an L-shaped support plate 80, the L-shaped support plate 80 is fixedly connected with the guide column 7211, a tool 81 is connected with the L-shaped support plate 80 through the rotating shaft 2124, a telescopic cylinder 82 is movably connected with one side of the L-shaped support plate 80, the piston rod of the telescopic cylinder 82 is movably connected with the tool 81, the telescopic cylinder 82 is driven to rotate the tool 81 by a certain angle, and then the angle of chamfering is adjusted. The end of the L-shaped support plate 2121 is provided with a circular arc part 83, the tool 81 is matched with the circular arc part 83, and the tool 81 is convenient to rotate.

[0072] The above describes one embodiment of the application in detail, but the content is only the preferred embodiment of the application and cannot be considered as limiting the implementation range of the application. Any equivalent changes and improvements made according to the application scope should still belong to the patent scope of the application.

Claims

1. A production equipment for socket-and-spigot polyethylene pipes, characterized in that: The production equipment includes an extruder, a forming die, a sizing sleeve, a water-cooling spray mechanism, a haul-off machine, a cutting machine, a chamfering machine, an automatic hot-melt welding machine, an injection molding machine, and a lathe. The pipe is extruded by the extruder, formed through the forming die and the sizing sleeve, and the socket component is injection-molded by the injection molding machine. The chamfered pipe and the socket component are hot-melt-welded by an automatic hot-melt welding machine to form a socket-type polyethylene pipe. The chamfering machine comprises a box body, chamfering mechanisms are symmetrically installed on both sides of the box body, and a clamping mechanism is fixedly installed inside the box body; The chamfering mechanism includes a central plate, a plurality of fixed cylinders are installed on the outer circumference of the central plate at equal distances, the piston rod ends of the fixed cylinders are connected to the box body, and a driving gear is provided on the central plate, and the driving gear is driven by a motor; The central disk is rotatably connected to an outer tube, the outer circumference of the outer tube close to the central disk is sleeved with a gear ring, the gear ring is meshed with a driving gear, and a plurality of chamfering tools are arranged in an array on the inner wall of the outer tube; The outer tube is a hollow structure, the inner tube is rotatably connected to the inner tube, and the outer peripheral surface of the inner tube is provided with teeth; A notch is provided on the outer wall of the outer tube, an adjusting motor is installed in the notch, an adjusting gear is fixedly installed on the output shaft of the adjusting motor, and the adjusting gear is meshed with the teeth; A plurality of wedge blocks 2 are installed at equal distances on the inner wall of the inner tube, and the wedge blocks 2 are adapted to the wedge blocks 1. A guide column is provided at the bottom center of the wedge block 1, and the guide column passes through the outer tube and is connected to the chamfering tool. A spring 1 is sleeved on the guide column; A plurality of limit blocks are arranged at equal distances on the central plate, and the limit blocks are adapted to the wedge block 2; The chamfering tool includes an L-shaped support plate, which is fixedly connected to the guide column. The L-shaped support plate is connected to the tool via a rotating shaft. One side of the L-shaped support plate is movably connected to a telescopic cylinder, and the piston rod of the telescopic cylinder is movably connected to the tool.

2. The production equipment of a socket-and-spigot type polyethylene pipe according to claim 1, characterized in that: The end of the L-shaped support plate is provided with an arc portion, and the tool is adapted to the arc portion.

3. The production equipment of a socket-and-spigot type polyethylene pipe according to claim 2, characterized in that: The clamping mechanism includes a through tube, one end of which is fixedly mounted with a trapezoidal tube, a movable ring is sleeved on the trapezoidal tube, a movable push plate is fixedly mounted on the movable ring, a movable push rod is fixedly mounted at the top center of the movable push plate, the top of the movable push rod passes through the box and is connected to the movable cylinder, and the movable cylinder is movably mounted on the box; A plurality of inclined protrusions are installed at equal distances on the inner wall of the trapezoidal tube, a guide hole is provided on the protrusion, a movable clip is clamped on the protrusion, an inclined groove is provided on the movable clip to cooperate with the protrusion, a sliding groove is provided in the inclined groove, one end of the movable clip is connected to the inner wall of the trapezoidal tube through a spring sheet, a clamping arc groove is provided on the movable clip, and a plurality of the clamping arc grooves form a circle; A plurality of movable guide rods are installed at equal distances on the inner wall of the movable ring. The movable guide rods pass through the guide holes and are connected to the movable pin shafts. A second spring is sleeved on the movable guide rods, and the movable pin shafts are adapted to the sliding grooves.

4. The production equipment of a socket-and-spigot type polyethylene pipe according to claim 3, characterized in that: A clamping bevel groove is formed between every two of the protruding blocks, the clamping bevel groove is adapted to the movable clamp, and a limiting wedge strip is arranged inside the clamping bevel groove.

5. The production equipment of a socket-and-spigot type polyethylene pipe according to claim 3, characterized in that: Collection troughs are provided on both sides of the box body and below the chamfering mechanism.

6. A production process for a spigot-and-socket polyethylene pipe, characterized in that: The production equipment of the spigot-and-socket polyethylene pipe according to claim 1 comprises the following steps: (1) After the polyethylene raw material is dried, it is added to the extruder and injection molding machine respectively, extruded by the extruder, formed into a pipe after passing through a forming die and a sizing sleeve, and then the socket component is injected into the injection molding machine; (2) The pipe formed by the sizing sleeve is sprayed and cooled by a water-cooling spray mechanism; at the same time, the socket component is mounted on a lathe using a supporting fixture to groove the inside of the socket component. After the groove is completed, the sealing ring is installed in the processed groove; (3) The cooled and formed pipe is marked by a marking machine and pulled by a traction machine; (4) Cut the marked pipe to a fixed length and chamfer one or both ends of the pipe using a chamfering machine; (5) The chamfered pipe and the socket component are hot-melt welded by an automatic hot-melt welding machine to form a socket-type polyethylene pipe, and the flange generated on the inner wall of the welding point between the pipe and the socket component is trimmed to keep the inner wall of the pipe smooth, thus completing the production of the socket-type polyethylene pipe.

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