A composite pipeline sealing device and process method

Abstract

The present invention discloses a composite pipe sealing device and a process method, which relates to the technical field of pipe sealing; the present invention includes an L-shaped frame and a sealing processing table, the L-shaped frame is fixedly arranged on one side of the sealing processing table, and a moving table is slidably arranged in the L-shaped frame; in the present invention, through the arranged sealing mechanism, the injection mold head, the mandrel, the heating plate and the cooling mold head in the sealing mechanism act on the pipe fittings step by step. The heating plate plasticizes the end of the pipe fitting, the injection mold head makes the plasticized polyethylene material adhere to the end of the pipe fitting, the mandrel rounds the end of the pipe fitting and the injected plasticized polyethylene material, the cooling mold head extrudes the end of the pipe fitting, and the end of the pipe fitting is cooled and shaped in the cooling mold head to complete the sealing, thereby conveniently realizing the sealing processing of the pipe fittings, effectively improving the sealing effect of the pipe fittings, avoiding the situation that the sealing cannot be formed due to the relatively thin polyethylene layer at the end of the pipe fitting, and there is no need to ensure that the sealing is completed under the condition of a straight cut.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline sealing, and specifically to a composite pipeline sealing device and a process method. Background Art

[0002] A polyethylene composite pipeline refers to a pipeline formed by using two different densities of polyethylene resins. The two resins are respectively plasticized and melted by two extruders at the same time, and then the molten materials are simultaneously extruded into a mold capable of forming a composite pipe. The formed pipe is a polyethylene composite pipe.

[0003] This composite pipe can be formed by extruding and compounding various plastics. The pipe formed by compounding high-density polyethylene and low-density polyethylene materials has the characteristics of both raw materials. Its pressure resistance and corrosion resistance are better than those of ordinary polyethylene pipes. In industrial and mining enterprises, this composite pipe can be used to replace steel pipes for the transportation of corrosive media such as oil and gas, or for mine ventilation pipelines, etc.

[0004] Currently, the mainstream solutions for sealing polyethylene composite pipelines are hot extrusion sealing of the main body material (abbreviation: extrusion sealing) and welding plastic ring sealing (abbreviation: welding sealing).

[0005] Among them, extrusion sealing is the latest technology. After heating and plasticizing the main body material at the end of the pipeline, force is applied to press it into the cooling mold groove, so that the plasticized material at the end overflows towards the end under the action of the gradually decreasing groove, and the overflowing polyethylene adheres to the end of the pipe and is cooled and shaped to achieve sealing.

[0006] However, there are still some defects in achieving sealing through the above solutions:

[0007] 1. Extrusion sealing requires a relatively thick wall thickness of the polyethylene composite pipeline to extrude and transfer the material to the end face of the pipe to form a seal. For existing steel skeleton pipes, steel plate perforated network pipes, etc. in the market, due to the relatively thick pipe reinforcement material and thin polyethylene layer, the transferable material is limited and extrusion sealing cannot be formed.

[0008] 2. Extrusion sealing requires a straight cut of the pipeline. Otherwise, the material at the concave part of the end face is insufficient and the seal cannot be formed.

[0009] In view of the above problems, the inventor proposes a composite pipeline sealing device and a process method to solve the above problems. Summary of the Invention

[0010] In order to solve the above problems, the purpose of the present invention is to provide a composite pipeline sealing device and a process method.

[0011] To solve the above technical problems, the present invention adopts the following technical solutions: A composite pipeline sealing process method includes the following steps:

[0012] S1. First, fix the composite pipe on the processing table, and heat the end of the composite pipe through a heating device to make the end of the composite pipe in a plasticized state;

[0013] S2. Extrude polyethylene material into the mold through an extruder, and then push the integral mandrel and the mold into the end of the pipe. The integral mandrel first enters the composite pipe to round the end of the composite pipe. The mold enters the inside of the composite pipe, and the plasticized polyethylene material adheres to the end face of the pipe. As the integral mandrel and the mold are withdrawn, the integral mandrel rounds the end of the composite pipe again, so that the plasticized polyethylene material forms a seal at the pipe end cross-section;

[0014] S3. Then push the low-temperature mold into the end of the composite pipe. The composite pipe with the adhered polyethylene material enters a low-temperature mold for extrusion and shaping. Under the action of high extrusion pressure, the plasticized polyethylene material adheres to the end face of the composite pipe as a whole and is cooled and shaped synchronously.

[0015] The present invention also provides a device for a composite pipe sealing process method, including an L-shaped frame and a sealing processing table. The L-shaped frame is fixedly arranged on one side of the sealing processing table. A moving table is slidably arranged in the L-shaped frame. Baffles are fixedly arranged on both sides of the sealing processing table. A sealing mechanism is arranged on the L-shaped frame and the moving table. A loading and unloading mechanism is arranged on the sealing processing table. A material control mechanism is also arranged on the sealing processing table.

[0016] Preferably, the sealing mechanism includes a material injection die head, a mandrel, a heating plate and a cooling die head. One end of the mandrel is fixedly provided with a connecting shaft, and one end of the connecting shaft is fixedly connected with one end of the material injection die head. The material injection die head, the mandrel, the heating plate and the cooling die head are assembled on the moving table;

[0017] An expansion cavity and a material injection cavity are respectively arranged at one end of the material injection die head, and the material injection cavity is communicated with the expansion cavity;

[0018] An expansion groove and a circular pressing groove are respectively arranged at one end of the cooling die head, and the expansion groove is communicated with the circular pressing groove.

[0019] Preferably, a fixed seat is fixedly arranged at the other end of the material injection die head. One side of the fixed seat is fixedly connected with the moving table. A material injection pipe is fixedly arranged on the fixed seat. One end of the material injection pipe is fixedly provided with two branch pipes, and one end of the two branch pipes is communicated with the material injection cavity;

[0020] A guide air pipe is fixedly arranged on the outer wall of the cooling die head, and one end of the guide air pipe is communicated with the circular pressing groove.

[0021] Preferably, one end of the L-shaped frame is fixedly provided with a first cylinder, the piston end of the first cylinder is fixedly connected to the middle of the moving table, one end of the moving table is respectively fixedly provided with a second cylinder and a third cylinder, the piston end of the second cylinder is fixedly connected to the upper surface of the heating plate, and the piston end of the third cylinder is fixedly connected to the outer wall of the cooling die head.

[0022] Preferably, a plurality of guiding rollers are rotatably installed on the lower end surface of the moving table, two bases are fixedly arranged on the inner wall of the L-shaped frame, guiding grooves are formed on the upper surfaces of the two bases, and the guiding rollers are slidably arranged in the guiding grooves.

[0023] Preferably, the loading and unloading mechanism includes a feeding plate, the cross section of the feeding plate is arc-shaped, a first notch is formed in the middle of one of the baffles, the feeding plate corresponds to the first notch, and the first notch corresponds to the injection die head;

[0024] One end of the upper surface of the sealing processing table is provided with a first inclined surface, the other end of the upper surface of the sealing processing table is provided with a second inclined surface, and the feeding plate is located between the first inclined surface and the second inclined surface;

[0025] One end of the sealing processing table is fixedly provided with a feeding platform, and the feeding platform is located at one end of the second inclined surface away from the feeding plate.

[0026] Preferably, a baffle is fixedly arranged on the feeding platform, second notches are formed at one ends of the two baffles, and the two second notches correspond to the feeding platform.

[0027] Preferably, the material control mechanism includes a U-shaped frame, the U-shaped frame is arranged in the inner cavity of the sealing processing table, a plurality of fixing rods are fixedly arranged on the upper surface of the U-shaped frame, U-shaped sleeves are fixedly arranged at one ends of the plurality of fixing rods, rotating shafts are rotatably installed on the plurality of U-shaped sleeves, limiting beads are fixedly arranged in the middle of the plurality of rotating shafts, and shrinkage grooves corresponding to the limiting beads are formed on both the first inclined surface and the feeding plate;

[0028] A plurality of fourth cylinders are fixedly arranged in the inner cavity of the sealing processing table, and the piston ends of the plurality of fourth cylinders are fixedly connected to the lower surface of the U-shaped frame.

[0029] Preferably, a plurality of frame plates are fixedly arranged in the inner cavity of the sealing processing table, guiding grooves are formed on the plurality of frame plates, guiding blocks are slidably installed on the inner walls of the plurality of guiding grooves, and one sides of the plurality of guiding blocks are fixedly connected to the outer side wall of the U-shaped frame.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. In the present invention, the sealing mechanism is provided, and the injection mold head, the core rod, the heating plate and the cooling mold head in the sealing mechanism act on the pipe fitting in steps, the heating plate plasticizes the end of the pipe fitting, the injection mold head makes the plasticized polyethylene material adhere to the end of the pipe fitting, the core rod rounds the end of the pipe fitting and the injected plasticized polyethylene material, the cooling mold head extrude the end of the pipe fitting, the end of the pipe fitting is cooled and shaped in the cooling mold head, and the sealing is completed, so that the sealing process of the pipe fitting is conveniently realized, and the sealing effect of the pipe fitting is effectively improved, while avoiding the inability to form a seal due to the thin polyethylene layer at the end of the pipe fitting, and there is no need to ensure that the sealing is completed under the condition of straight incision;

[0032] 2. In the present invention, by setting up a loading and unloading mechanism and a material control mechanism, the pipe fittings to be sealed on the sealing processing table are allowed to enter the processing station one by one, and at the same time, the pipe fittings after sealing processing are automatically made to slide down for collection by the workers, thereby facilitating the loading and unloading of the pipe fittings, thereby effectively improving the efficiency of the pipe fitting sealing processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 The present invention is a schematic diagram of the overall structure of a composite pipe sealing method of the equipment.

[0035] Figure 2 Another overall structural schematic diagram of a composite pipe sealing process method of the present invention.

[0036] Figure 3 It is a structural schematic diagram of the sealing mechanism of the present invention.

[0037] Figure 4 It is a cutaway front view of the injection mold head and the cooling mold head of the present invention.

[0038] Figure 5 It is a schematic diagram of the separation structure of the baffle and the sealing processing table of the present invention.

[0039] Figure 6 It is a schematic diagram of the cutaway structure of the sealing processing station of the present invention.

[0040] Figure 7 It is a structural schematic diagram of the material control mechanism of the present invention.

[0041] Figure 8 For the present invention Figure 7Schematic enlarged view of part A in

[0042] Figure 9 Schematic connection diagram of the pipe fitting and the sealing and processing table in the embodiment of the present invention.

[0043] Figure 10 Schematic connection diagram of the pipe fitting and the sealing mechanism in the embodiment of the present invention.

[0044] Figure 11 Schematic connection diagram of the pipe fitting and the injection mold head in the embodiment of the present invention.

[0045] Figure 12 Schematic connection diagram of the pipe fitting and the cooling mold head in the embodiment of the present invention.

[0046] In the figure: 1. L-shaped frame; 2. Sealing and processing table; 11. Moving table; 21. Baffle; 3. Sealing mechanism; 31. Injection mold head; 32. Mandrel; 33. Heating plate; 34. Cooling mold head; 311. Injection cavity; 312. Flaring cavity; 313. Fixed seat; 314. Injection pipe; 315. Branch pipe; 321. Connecting shaft; 341. Circular pressing groove; 342. Flaring groove; 343. Air guide pipe; 35. First cylinder; 36. Second cylinder; 37. Third cylinder; 38. Guide roller; 39. Base; 4. Guide groove; 5. Loading and unloading mechanism; 51. Loading plate; 511. First notch; 52. First inclined surface; 53. Second inclined surface; 54. Loading platform; 55. Stop plate; 56. Second notch; 6. Material control mechanism; 61. Return-shaped frame; 62. Fixed rod; 63. U-shaped sleeve; 64. Rotating shaft; 65. Limit bead; 651. Shrinkage groove; 66. Fourth cylinder; 67. Frame plate; 68. Guide groove; 69. Guide block; 100. Pipe fitting. Specific embodiments

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Embodiment: As Figures 1-12 shown, the present invention provides a composite pipe sealing process method, including the following steps:

[0049] S1. First, fix the composite pipe on the processing table, and heat the end of the composite pipe through a heating device to make the end of the composite pipe in a plasticized state;

[0050] S2. Extrude the polyethylene material into the mold through an extruder, and then push the integral core mold and the mold into the end of the pipeline. The integral core mold first enters the composite pipeline, rounds the end of the composite pipeline, and the mold enters the interior of the composite pipeline. The plasticized polyethylene material adheres to the end face of the pipeline. As the integral core mold and the mold are withdrawn, the integral core mold rounds the end of the composite pipeline again, causing the plasticized polyethylene material to form a seal at the pipe end cross-section;

[0051] S3. Then push the low-temperature mold into the end of the composite pipeline. The composite pipeline with the adhered polyethylene material enters a low-temperature mold for extrusion and shaping. Under the action of high extrusion pressure, the plasticized polyethylene material adheres to the end face of the composite pipeline as a whole and is cooled and shaped synchronously.

[0052] The present invention also provides a device for a composite pipeline sealing process method, including an L-shaped frame 1 and a sealing processing table 2. The L-shaped frame 1 is fixedly arranged on one side of the sealing processing table 2. A moving table 11 is slidably arranged in the L-shaped frame 1. Baffles 21 are fixedly arranged on both sides of the sealing processing table 2. By arranging the sealing processing table 2 and the baffles 21, the pipe fittings 100 to be sealed can be placed on the sealing processing table 2, and the baffles 21 can limit the two ends of the pipe fittings 100 to prevent the pipe fittings 100 from tilting. A sealing mechanism 3 is arranged on the L-shaped frame 1 and the moving table 11. By arranging the sealing mechanism 3, the sealing mechanism 3 can perform sealing processing on the end face of the pipe fittings 100, improving the sealing effect of the pipe fittings 100 compared with the prior art. A loading and unloading mechanism 5 is arranged on the sealing processing table 2, and a material control mechanism 6 is also arranged on the sealing processing table 2. By arranging the loading and unloading mechanism 5 and the material control mechanism 6, the cooperation between the loading and unloading mechanism 5 and the material control mechanism 6 can enable the pipe fittings 100 to be sealed on the sealing processing table 2 to enter the processing station, and at the same time enable the processed pipe fittings 100 to slide off for the operator to collect, thereby improving the efficiency of the sealing processing of the pipe fittings 100.

[0053] The sealing mechanism 3 includes a material injection die head 31, a mandrel 32, a heating plate 33, and a cooling die head 34. One end of the mandrel 32 is fixedly provided with a connecting shaft 321. One end of the connecting shaft 321 is fixedly connected to one end of the material injection die head 31. The material injection die head 31, the mandrel 32, the heating plate 33, and the cooling die head 34 are assembled on the moving table 11. By setting the material injection die head 31, the mandrel 32, the heating plate 33, and the cooling die head 34, after the plasticized polyethylene material is injected into the interior of the material injection die head 31, by aligning the heating plate 33 with the pipe fitting 100, the heating plate 33 is an electric heating device, and the heating plate 33 can heat the end of the pipe fitting 100 to plasticize the end of the pipe fitting 100. By pushing the material injection die head 31 and the mandrel 32 towards the pipe fitting 100, the plasticized polyethylene material can adhere to the end face of the pipe fitting 100. After the mandrel 32 enters the interior of the pipe fitting 100, it can round the end of the pipe fitting 100 and at the same time can arrange the plasticized polyethylene material on the end face of the pipe fitting 100 to prepare for cooling and shaping. By aligning the cooling die head 34 with the pipe fitting 100, when the cooling die head 34 is pressed against the end of the pipe fitting 100, the plasticized polyethylene material adhered to the end face of the pipe fitting 100 forms extrusion cooling and shaping in the cavity of the cooling die head 34. After shaping, separating the cooling die head 34 from the pipe fitting 100 can complete the sealing work of the pipe fitting 100;

[0054] One end of the material injection die head 31 is respectively provided with an expansion cavity 312 and a material injection cavity 311. The material injection cavity 311 is communicated with the expansion cavity 312. The other end of the material injection die head 31 is fixedly provided with a fixed seat 313. One side of the fixed seat 313 is fixedly connected to the moving table 11. A material injection pipe 314 is fixedly provided on the fixed seat 313. One end of the material injection pipe 314 is fixedly provided with two branch pipes 315. One end of the two branch pipes 315 is communicated with the material injection cavity 311. By setting the expansion cavity 312, the material injection cavity 311, the material injection pipe 314, and the branch pipes 315, the material injection pipe 314 is connected to the extruder. The plasticized polyethylene material extruded by the extruder enters the material injection cavity 311 and the expansion cavity 312 through the material injection pipe 314 and the branch pipes 315. When the expansion cavity 312 reaches the end face of the pipe fitting 100, the plasticized polyethylene material adheres to the end face of the pipe fitting 100 (the end face of the pipe fitting 100 is pre-plasticized by the heating plate 33);

[0055] An expanding groove 342 and a circular pressing groove 341 are respectively provided at one end of the cooling die head 34, and the expanding groove 342 is connected to the circular pressing groove 341. An air guide pipe 343 is fixedly provided on the outer wall of the cooling die head 34, and one end of the air guide pipe 343 is connected to the circular pressing groove 341. By arranging the air guide pipe 343, the circular pressing groove 341 and the expanding groove 342, the air guide pipe 343 is externally connected to a cold source device. When the cold source device generates cold air, the cold air enters the circular pressing groove 341 and the expanding groove 342 through the air guide pipe 343 to cool the cooling die head 34. When the expanding groove 342 reaches the end of the pipe 100, the extrusion force of the cooling die head 34 causes the plasticized polyethylene material adhered to the end face of the pipe 100 to be extruded, cooled and shaped in the expanding groove 342.

[0056] A first cylinder 35 is fixedly provided at one end of the L-shaped frame 1, and a piston end of the first cylinder 35 is fixedly connected to the middle part of the movable platform 11. A second cylinder 36 and a third cylinder 37 are fixedly provided at one end of the movable platform 11, respectively. The piston end of the second cylinder 36 is fixedly connected to the upper surface of the heating plate 33, and the piston end of the third cylinder 37 is fixedly connected to the outer wall of the cooling mold head 34. By turning on the first cylinder 35, the first cylinder 35 can push the movable platform 11 to move horizontally, and the movable platform 11 can make the injection mold head 31, the core rod 32, the heating plate 33 and the cooling mold head 34 move horizontally synchronously. By turning on the second cylinder 36 and the third cylinder 37, the second cylinder 36 can push the heating plate 33 to rise and fall vertically, so that the heating plate 33 corresponds to or staggers with the pipe fitting 100, and the third cylinder 37 can push the cooling mold head 34 to correspond to or stagger with the pipe fitting 100.

[0057] A plurality of guide rollers 38 are rotatably mounted on the lower end surface of the movable platform 11. Two bases 39 are fixedly mounted on the inner wall of the L-shaped frame 1. Guide grooves 4 are provided on the upper surfaces of the two bases 39. The guide rollers 38 are slidably arranged in the guide grooves 4. By arranging the guide rollers 38 and the guide grooves 4, when the movable platform 11 moves horizontally, the guide rollers 38 move horizontally and rotate in the guide grooves 4, thereby guiding the movable platform 11 in the horizontal direction, so that the movable platform 11 keeps moving in the horizontal direction, and the stability of the movable platform 11 is improved.

[0058] The loading and unloading mechanism 5 includes a discharge plate 51, the cross section of which is arc-shaped, and a first notch 511 is provided in the middle of one of the baffles 21, the discharge plate 51 corresponds to the first notch 511, and the first notch 511 corresponds to the injection mold head 31. By setting the discharge plate 51, when the pipe 100 is located on the upper surface of the discharge plate 51, the pipe 100 can be sealed. By setting the first notch 511, the injection mold head 31, the core rod 32 and the cooling mold head 34 can pass through the first notch 511 to act on the pipe 100;

[0059] One end of the upper surface of the sealing processing table 2 is provided with a first inclined surface 52, and the other end of the upper surface of the sealing processing table 2 is provided with a second inclined surface 53. The feeding plate 51 is located between the first inclined surface 52 and the second inclined surface 53. By providing the first inclined surface 52 and the second inclined surface 53, the pipe fitting 100 to be processed by sealing can be temporarily placed on the first inclined surface 52. When the pipe fitting 100 on the first inclined surface 52 is released from the limit, the pipe fitting 100 rolls down onto the feeding plate 51 under the action of the first inclined surface 52 and its own weight. Since the upper surface of the feeding plate 51 is arc-shaped, the pipe fitting 100 is located in the middle of the upper surface of the feeding plate 51 after it stops. When the sealing processing of the pipe fitting 100 is completed, the pipe fitting 100 to be processed by sealing rolls down onto the feeding plate 51, pushing the pipe fitting 100 that has been processed by sealing on the feeding plate 51, and the pushed pipe fitting 100 rolls down through the second inclined surface 53;

[0060] One end of the sealing processing table 2 is fixedly provided with a feeding platform 54. The feeding platform 54 is located at one end of the second inclined surface 53 away from the feeding plate 51. A baffle plate 55 is fixedly provided on the feeding platform 54. Second notches 56 are respectively opened at one ends of the two baffle plates 21. The two second notches 56 correspond to the feeding platform 54. By providing the feeding platform 54, the baffle plate 55 and the second notches 56, the pipe fitting 100 that rolls down through the second inclined surface 53 can fall onto the feeding platform 54. The baffle plate 55 can block and limit the pipe fitting 100 on the feeding platform 54, so that the pipe fitting 100 is stationary on the feeding platform 54. The provided second notches 56 facilitate the operator to extract the pipe fitting 100 on the feeding platform 54.

[0061] The material control mechanism 6 includes a U-shaped frame 61. The U-shaped frame 61 is arranged in the inner cavity of the sealing processing table 2. A plurality of fixing rods 62 are fixedly provided on the upper surface of the U-shaped frame 61. U-shaped sleeves 63 are fixedly provided at one ends of the plurality of fixing rods 62. Rotating shafts 64 are rotatably installed on the plurality of U-shaped sleeves 63. Limiting beads 65 are fixedly provided in the middle of the plurality of rotating shafts 64. Shrinkage grooves 651 corresponding to the limiting beads 65 are respectively opened on the first inclined surface 52 and the feeding plate 51. By providing the limiting beads 65 and the shrinkage grooves 651, when the U-shaped frame 61 descends in the inner cavity of the sealing processing table 2, the U-shaped frame 61 can make the limiting beads 65 descend vertically through the fixing rods 62, the U-shaped sleeves 63 and the rotating shafts 64. When the limiting beads 65 completely enter the interior of the shrinkage grooves 651, the limit on the pipe fitting 100 on the first inclined surface 52 and the feeding plate 51 can be released. When the U-shaped frame 61 rises vertically, the limiting beads 65 rise from the shrinkage grooves 651 to the initial state, and the pipe fitting 100 on the first inclined surface 52 and the feeding plate 51 can be limited, so that the pipe fitting 100 on the first inclined surface 52 and the feeding plate 51 is stationary;

[0062] A number of fourth cylinders 66 are fixedly arranged in the inner cavity of the sealing processing table 2. The piston ends of the number of fourth cylinders 66 are fixedly connected to the lower surface of the U-shaped frame 61. By activating the fourth cylinders 66, the pistons of the fourth cylinders 66 can cause the U-shaped frame 61 to vertically lift and lower in the inner cavity of the sealing processing table 2.

[0063] A number of frame plates 67 are fixedly arranged in the inner cavity of the sealing processing table 2. Guide grooves 68 are formed in each of the number of frame plates 67. Guide blocks 69 are slidably installed on the inner walls of the number of guide grooves 68. One side of each of the number of guide blocks 69 is fixedly connected to the outer side wall of the U-shaped frame 61. By providing the guide grooves 68 and the guide blocks 69, the guide blocks 69 can slide vertically along the inner walls of the guide grooves 68, so as to guide the U-shaped frame 61 in the vertical direction and keep the U-shaped frame 61 lifting and lowering in the vertical direction.

[0064] Working principle: When it is necessary to perform sealing processing on the pipe fitting 100, the operator first connects the injection pipe 314 to the discharge pipe of the extruder, and then externally connects the air guide pipe 343 to a cold source device. The cold air generated by the operation of the cooling device cools the cooling die head 34 to the temperature required for cooling and shaping, and is ready for use;

[0065] At this time, the operator places a batch of pipe fittings 100 between four adjacent limit beads 65 (refer to Figure 9 ), and the batch of pipe fittings 100 are limited on the first inclined surface 52 in an inclined state;

[0066] Subsequently, the operator activates the fourth cylinders 66. The piston ends of the fourth cylinders 66 contract, pulling the U-shaped frame 61 to vertically descend. The U-shaped frame 61 causes the number of limit beads 65 to vertically descend through a plurality of fixing rods 62, U-shaped sleeves 63 and rotating shafts 64. When the number of limit beads 65 completely enter the corresponding contraction grooves 651, the limit on the pipe fittings 100 on the first inclined surface 52 is released at this time. The plurality of pipe fittings 100 roll downward in sequence under the condition of the first inclined surface 52 and their own weights, and the frontmost pipe fitting 100 rolls to the middle of the upper surface of the feeding plate 51. During this process, the operator activates the fourth cylinders 66 again (the interval time between the two activations of the fourth cylinders 66 depends on the downward rolling condition of the pipe fittings 100 and is manually controlled by the operator), causing the number of limit beads 65 to rise and reset. After the number of limit beads 65 are reset, they limit the pipe fittings 100 on the first inclined surface 52 and the feeding plate 51, and the pipe fitting 100 on the feeding plate 51 is located at the central position (the center point of the cross section) of the feeding plate 51;

[0067] At this time, the operator turns on the second cylinder 36. The piston end of the second cylinder 36 extends, pushing the heating plate 33 vertically downward so that the heating plate 33 corresponds to the first notch 511. When the heating plate 33 operates, it heats the end of the pipe fitting 100, plasticizes the end of the pipe fitting 100 according to the process requirements. After plasticization, the second cylinder 36 is turned on again to make the heating plate 33 rise and reset.

[0068] Then the first cylinder 35 is turned on, and the piston end of the first cylinder 35 extends. The first cylinder 35 horizontally moves the injection die head 31, the mandrel 32, the heating plate 33, and the cooling die head 34 toward the side of the sealing processing table 2 through the moving table 11. The mandrel 32 first enters the end of the pipe fitting 100 to round the end of the pipe fitting 100. When the flaring cavity 312 reaches the end face of the pipe fitting 100, the extruder starts to operate. The plasticized polyethylene material extruded by the extruder enters the injection cavity 311 and the flaring cavity 312 through the injection pipe 314 and the branch pipe 315. The plasticized polyethylene material adheres to the end face of the pipe fitting 100. Then the piston end of the first cylinder 35 contracts, and the mandrel 32 and the injection die head 31 retract and gradually separate from the end of the pipe fitting 100. During the retraction process, the mandrel 32 arranges the plasticized polyethylene material on the end face of the pipe fitting 100 to prepare for cooling and shaping.

[0069] Subsequently, the operator turns on the third cylinder 37, and the piston end of the third cylinder 37 extends. The piston end of the third cylinder 37 pushes the cooling die head 34 vertically downward to make the cooling die head 34 coaxial with the pipe fitting 100. Then the piston end of the first cylinder 35 extends, and the first cylinder 35 horizontally moves the cooling die head 34 toward the side of the sealing processing table 2 through the moving table 11. When the flaring groove 342 reaches the end of the pipe fitting 100, the extrusion pressure of the cooling die head 34 causes the plasticized polyethylene material adhered to the end face of the pipe fitting 100 to be extruded and cooled and shaped in the flaring groove 342, and thus the sealing processing of the pipe fitting 100 can be completed.

[0070] After the sealing processing of a single pipe fitting 100 is completed, the operator turns on the fourth cylinder 66 again to make the limit beads 65 descend into the shrinkage groove 651. After the pipe fitting 100 on the first inclined surface 52 is released from the limit, the pipe fitting 100 rolls downward and pushes the pipe fitting 100 on the feeding plate 51. The pushed pipe fitting 100 separates from the feeding plate 51 and rolls downward along the second inclined surface 53 to the feeding platform 54. At the same time, the limit beads 65 rise to limit the pipe fitting 100 on the first inclined surface 52 and the feeding plate 51 for the next sealing processing.

[0071] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. An apparatus for a composite pipe sealing process method, comprising an L-shaped frame (1) and a sealing processing table (2), characterized in that, The L-shaped frame (1) is fixedly arranged on one side of the sealing processing table (2). A moving table (11) is slidably arranged in the L-shaped frame (1). Baffles (21) are fixedly arranged on both sides of the sealing processing table (2). A sealing mechanism (3) is arranged on the L-shaped frame (1) and the moving table (11). A loading and unloading mechanism (5) is arranged on the sealing processing table (2). A material control mechanism (6) is also arranged on the sealing processing table (2). The sealing mechanism (3) includes a material injection die head (31), a mandrel (32), a heating plate (33), and a cooling die head (34). A connecting shaft (321) is fixedly arranged at one end of the mandrel (32). One end of the connecting shaft (321) is fixedly connected to one end of the material injection die head (31). The material injection die head (31), the mandrel (32), the heating plate (33), and the cooling die head (34) are assembled on the moving table (11). An expansion cavity (312) and a material injection cavity (311) are respectively arranged at one end of the material injection die head (31). The material injection cavity (311) is communicated with the expansion cavity (312). An expansion groove (342) and a circular pressing groove (341) are respectively arranged at one end of the cooling die head (34). The expansion groove (342) is communicated with the circular pressing groove (341). A first cylinder (35) is fixedly arranged at one end of the L-shaped frame (1). The piston end of the first cylinder (35) is fixedly connected to the middle of the moving table (11). A second cylinder (36) and a third cylinder (37) are respectively fixedly arranged at one end of the moving table (11). The piston end of the second cylinder (36) is fixedly connected to the upper surface of the heating plate (33). The piston end of the third cylinder (37) is fixedly connected to the outer wall of the cooling die head (34). The loading and unloading mechanism (5) includes a material placing plate (51). The cross-section of the material placing plate (51) is arc-shaped. A first notch (511) is arranged in the middle of one of the baffles (21). The material placing plate (51) corresponds to the first notch (511). The first notch (511) corresponds to the material injection die head (31). A first inclined surface (52) is arranged at one end of the upper surface of the sealing processing table (2). A second inclined surface (53) is arranged at the other end of the upper surface of the sealing processing table (2). The material placing plate (51) is located between the first inclined surface (52) and the second inclined surface (53). A material placing platform (54) is fixedly arranged at one end of the sealing processing table (2). The material placing platform (54) is located at one end of the second inclined surface (53) away from the material placing plate (51). The material control mechanism (6) includes a U-shaped frame (61) which is arranged in the inner cavity of the sealing processing table (2). The upper surface of the U-shaped frame (61) is fixedly provided with a plurality of fixing rods (62). One end of each of the plurality of fixing rods (62) is fixedly provided with a U-shaped sleeve (63). A rotating shaft (64) is rotatably installed on each of the plurality of U-shaped sleeves (63). A limiting bead (65) is fixedly provided in the middle of each of the plurality of rotating shafts (64). Shrinkage grooves (651) corresponding to the limiting beads (65) are formed on both the first inclined surface (52) and the material discharging plate (51). A plurality of fourth cylinders (66) are fixedly arranged in the inner cavity of the sealing processing table (2). The piston ends of the plurality of fourth cylinders (66) are fixedly connected to the lower surface of the U-shaped frame (61).

2. The device for a composite pipeline sealing process method as described in claim 1, characterized in that, The other end of the injection mold head (31) is fixedly provided with a fixed seat (313). One side of the fixed seat (313) is fixedly connected to the moving table (11). A injection pipe (314) is fixedly arranged on the fixed seat (313). Two branch pipes (315) are fixedly arranged at one end of the injection pipe (314). One end of each of the two branch pipes (315) is communicated with the injection cavity (311). A gas guide pipe (343) is fixedly arranged on the outer wall of the cooling mold head (34). One end of the gas guide pipe (343) is communicated with the circular pressing groove (341).

3. The equipment for a composite pipe sealing process method as described in claim 1, characterized in that, A plurality of guiding rollers (38) are rotatably installed on the lower end surface of the moving table (11). Two bases (39) are fixedly arranged on the inner wall of the L-shaped frame (1). Guide grooves (4) are formed on the upper surfaces of the two bases (39). The guiding rollers (38) are slidably arranged in the guide grooves (4).

4. The device for a composite pipeline sealing process method as described in claim 1, characterized in that, A material blocking plate (55) is fixedly arranged on the material discharging platform (54). Second notches (56) are formed at one end of each of the two baffle plates (21). The two second notches (56) correspond to the material discharging platform (54).

5. The device for a composite pipe sealing process method according to claim 1, characterized in that, A plurality of frame plates (67) are fixedly arranged in the inner cavity of the sealing processing table (2). Guide grooves (68) are formed on each of the plurality of frame plates (67). Guide blocks (69) are slidably installed on the inner walls of the plurality of guide grooves (68). One side of each of the plurality of guide blocks (69) is fixedly connected to the outer side wall of the U-shaped frame (61).

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