A high-density polyethylene pipe production equipment and production process

Abstract

The invention belongs to the technical field of pipe production, and discloses a high-density polyethylene pipe production equipment and a production process thereof, comprising: a frame, wherein a No. 1 extruder is fixedly installed on both sides of the top of the frame, a No. 1 fixing ring is fixedly installed on one side of two extruders, a No. 1 fixing sleeve is fixedly installed on one end of two No. 1 fixing rings, a No. 1 sliding sleeve is slidably installed inside two No. 1 fixing sleeves, a syringe is rotatably installed on one end of two No. 1 sliding sleeves, an extrusion plunger is slidably installed inside two syringes, a one-way valve is arranged on one end of two syringes, a No. 2 sliding sleeve is rotatably installed on one end of two syringes, and a color mark line drawing mechanism is added to the equipment. This integrated method can better combine the marking material with the pipe, reduce the demand for additional, independent marking line drawing equipment, and thus reduce the equipment procurement cost.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe production, and in particular relates to a high-density polyethylene pipe production device and a production process thereof. Background Art

[0002] With the advancement of modernization, the demand for pipes in the construction industry, municipal engineering and other fields continues to grow. High-density polyethylene pipes are widely used in water supply and drainage systems, gas transmission systems, etc. due to their corrosion resistance, good flexibility, light weight and many other advantages;

[0003] However, in the production process of existing pipes, there is no function of drawing color-coded lines during the pipe extrusion process, and the marking line drawing cannot be completed directly during the pipe extrusion process. After the pipe is extruded, additional equipment or processes are required to draw the marking lines, resulting in a low production speed of color-coded line pipes. Summary of the invention

[0004] The present invention aims at the problem that the prior art has no function of drawing color-coded lines during the pipe extrusion process, and the marking line drawing cannot be completed directly during the pipe extrusion process. After the pipe is extruded, additional equipment or process is required to draw the marking line, resulting in a low production speed of the color-coded line pipe. The present invention proposes the following technical solutions:

[0005] A high-density polyethylene pipe production equipment, comprising: a frame, a No. 1 extruder is fixedly installed on both sides of the top of the frame, a No. 1 fixing ring is fixedly installed on one side of the two extruders, a No. 1 fixing sleeve is fixedly installed on one end of the two No. 1 fixing rings, a No. 1 sliding sleeve is slidably installed inside the two No. 1 fixing sleeves, a syringe is rotatably installed on one end of the two No. 1 sliding sleeves, an extrusion plunger is slidably installed inside the two syringes, a one-way valve is arranged on one end of the two syringes, a No. 2 sliding sleeve is rotatably installed on one end of the two syringes, a No. 2 fixing sleeve is slidably sleeved on the outer surface of the two No. 2 sliding sleeves, and a No. 2 fixing sleeve is fixedly installed on one end of the two No. 2 fixing sleeves. Ring, one end of the two extrusion plungers are fixedly connected with a metal hose, one end of the two metal hoses are fixedly connected with the same feeding bin, one end of the feeding bin is fixedly connected with a No. 2 extruder, the bottom end of the No. 2 extruder is fixedly installed in the middle of the top of the frame, guide rails are fixedly installed on both sides of the top of the frame, electric slides are slidably installed on the top of the two guide rails, annular hollow plates are fixedly installed on the top of the two electric slides, No. 1 motors are fixedly installed at the diagonal positions of the top and bottom ends of one side of the two annular hollow plates, four No. 1 motor output shafts are fixedly installed with screws, the outer surfaces of the four screws are threadedly connected with slides, and the two slides are fixedly installed on the corresponding outer surfaces of the extrusion plungers.

[0006] As a preferred embodiment of the above technical solution, a No. 2 motor is fixedly installed on one side of the two annular hollow plates, and the output shafts of the two No. 2 motors are fixedly connected to power wheels. Several driven wheels are arranged inside the two annular hollow plates. The two power wheels are movably sleeved with belts on the outer surfaces of the two adjacent driven wheels. The outer surfaces of the two belts are fitted with rotating rings, and the inner surfaces of the two rotating rings are fitted with supporting wheels and the supporting wheels are installed inside the corresponding annular hollow plates. A No. 1 connecting sleeve is fixedly installed on one end of the two rotating rings, and connecting rods are penetrated and connected inside the two No. 1 connecting sleeves, and the two connecting rods are fixedly installed on the outer surfaces of the corresponding injection barrels.

[0007] As a preferred embodiment of the above technical solution, a No. 2 connecting sleeve is sleeved on the outer surface of the No. 2 motor, and the bottom end of the No. 2 connecting sleeve is fixedly installed on the top of the electric slide.

[0008] As a preferred embodiment of the above technical solution, a slope is provided on one opposite end of the two No. 1 fixing sleeves and the No. 2 fixing sleeves, and the inner diameters of the two No. 1 fixing sleeves and the No. 2 fixing sleeves gradually increase toward the extrusion plunger.

[0009] As a preferred embodiment of the above technical solution, the outer surfaces of the two No. 1 motors located at the top of one side of the annular hollow plate are both sleeved with a stabilizing sleeve, and the tops of the two stabilizing sleeves are fixedly installed with long plates, and the two long plates are fixedly installed on the corresponding tops of the annular hollow plates.

[0010] As a preferred embodiment of the above technical solution, a fixed platform is fixedly installed at one end of the four screw rods, wherein the fixed platform at the top end is fixedly installed at the bottom end of the corresponding long board, and the fixed platform at the bottom end is fixedly installed at the top end of the corresponding electric slide.

[0011] As a preferred embodiment of the above technical solution, sealing rings are fixedly installed on the outer surfaces and inner surfaces of the two No. 1 sliding sleeves and the No. 2 sliding sleeves, and sealing rings are fixedly installed on both ends of the two injection barrels.

[0012] As a preferred embodiment of the above technical solution, both openings of the two rotating rings are provided with an inclination angle, and the width of the rotating ring gradually decreases toward the opening of the inner surface of the rotating ring.

[0013] The present invention also provides a production process using the above-mentioned high-density polyethylene pipe production equipment, the process comprising the following steps:

[0014] Production of pipes: The staff starts the No. 1 extruder, and the pipe liquid extruded from the No. 1 extruder is extruded along the direction of the No. 1 fixed ring;

[0015] Color mark line liquid preparation: Then the staff starts the No. 2 extruder, and the color mark line liquid extruded from the No. 2 extruder enters the two metal hoses through the feed bin, and then flows into the injection cylinder through the extrusion plunger for preparation. When the injection cylinder is full, stop the No. 2 extruder;

[0016] Draw the annular color mark line: Then start the No. 2 motor, No. 1 motor and electric slide. The rotation of No. 2 motor drives the driving wheel to rotate, and the rotation of the driving wheel drives the belt to rotate, so that the rotating ring that fits the belt rotates. At the same time, the movement of the electric slide drives the annular hollow plate to move. The rotation of No. 1 motor makes the two relative slides drive the extrusion plunger to squeeze closer to the injection cylinder. The pressure inside the injection cylinder is greater than the pressure on the other side of the one-way valve, so that the one-way valve opens, so that the color mark line liquid inside the injection cylinder flows out from the one-way valve and mixes with the pipe liquid.

[0017] Reset the annular color mark line device: After the rotating ring rotates one circle, the syringe barrel fits with the extrusion plunger, and the one-way valve is closed. At this time, the No. 2 motor is stopped, the No. 1 motor and the electric slide move in the opposite direction, and the No. 1 motor drives the slide to move in the opposite direction, so that the extrusion plunger is separated from the syringe barrel. When the extrusion plunger and the syringe barrel move to their original positions, the No. 1 motor and the electric slide are stopped, and then the No. 2 extruder is started to inject and fill the inside of the syringe barrel.

[0018] The beneficial effects of the present invention are:

[0019] (1) Adding a color marking line drawing mechanism to the equipment. This integrated approach can better combine the marking material with the pipe, reducing the need for additional, independent marking equipment, thereby reducing equipment procurement costs;

[0020] (2) By drawing color-coded lines with different trajectories, the needs of pipes in different environments can be well met, so that pipes with color-coded lines can be used as an information mark, so that construction personnel can more intuitively understand the installation path, connection method or special precautions of the pipeline based on the color-coded lines with different trajectories on the pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic structural diagram of a high-density polyethylene pipe production equipment in Example 1;

[0022] Figure 2 The figure shows a schematic diagram of the installation structure of the gear in Example 1;

[0023] Figure 3 The figure shows a schematic diagram of the installation structure of the unidirectional motor in Example 1;

[0024] Figure 4 The figure shows the installation structure diagram of the forward and reverse motor in the embodiment 1;

[0025] Figure 5 The figure shows the installation structure diagram of the second sliding seat in the embodiment 1;

[0026] Figure 6 What is shown is a schematic diagram of the installation structure of the push plate in Example 1.

[0027] In the figure: 1. frame; 2. extruder No. 1; 3. fixed ring No. 1; 4. fixed sleeve No. 1; 5. sliding sleeve No. 1; 6. injection cylinder; 7. extrusion plunger; 8. one-way valve; 9. sliding sleeve No. 2; 10. fixed sleeve No. 2; 11. fixed ring No. 2; 12. metal hose; 13. feed bin; 14. extruder No. 2; 15. guide rail; 16. electric slide; 17. annular hollow plate; 18. motor No. 1; 19. screw rod; 20. slide seat; 21. motor No. 2; 22. power wheel; 23. driven wheel; 24. belt; 25. rotating ring; 26. support wheel; 27. connecting sleeve No. 1; 28. connecting rod; 29. ​​connecting sleeve No. 2; 30. sealing ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0029] Example 1

[0030] The present invention provides a high-density polyethylene pipe production equipment, such as Figures 1 to 6As shown, it includes a frame 1, a No. 1 extruder 2 is fixedly installed on both sides of the top of the frame 1, a No. 1 fixing ring 3 is fixedly installed on one side of the two extruders, a No. 1 fixing sleeve 4 is fixedly installed on one end of the two No. 1 fixing rings 3, a No. 1 sliding sleeve 5 is slidably installed inside the two No. 1 fixing sleeves 4, an injection cylinder 6 is rotatably installed on one end of the two No. 1 sliding sleeves 5, an extrusion plunger 7 is slidably installed inside the two injection cylinders 6, a one-way valve 8 is provided on one end of the two injection cylinders 6, a No. 2 sliding sleeve 9 is rotatably installed on one end of the two injection cylinders 6, a No. 2 fixing sleeve 10 is slidably sleeved on the outer surface of the two No. 2 fixing sleeves 9, a No. 2 fixing ring 11 is fixedly installed on one end of the two No. 2 fixing sleeves 10, and one end of the two extrusion plungers 7 is fixed A metal hose 12 is connected, one end of the two metal hoses 12 is fixedly connected to the same feeding bin 13, one end of the feeding bin 13 is fixedly connected to a No. 2 extruder 14, the bottom end of the No. 2 extruder 14 is fixedly installed in the middle of the top of the frame 1, guide rails 15 are fixedly installed on both sides of the top of the frame 1, and electric slides 16 are slidably installed on the top of the two guide rails 15. Annular hollow plates 17 are fixedly installed on the tops of the two electric slides 16, and No. 1 motors 18 are fixedly installed at the diagonal positions of the top and bottom ends of one side of the two annular hollow plates 17. Four No. 1 motors 18 output shafts are fixedly installed with screws 19, and the outer surfaces of the four screws 19 are threadedly connected with slides 20, and the two slides 20 are fixedly installed on the corresponding outer surfaces of the extrusion plungers 7.

[0031] like Figure 2 and 3 As shown, a No. 2 motor 21 is fixedly installed on one side of the two annular hollow plates 17, and the output shafts of the two No. 2 motors 21 are fixedly connected to the power wheels 22, and several driven wheels 23 are arranged inside the two annular hollow plates 17. The outer surfaces of the two power wheels 22 and the two relatively adjacent driven wheels 23 are movably sleeved with belts 24, and the outer surfaces of the two belts 24 are fitted with rotating rings 25, and the inner surfaces of the two rotating rings 25 are fitted with supporting wheels 26, and the supporting wheels 26 are installed inside the corresponding annular hollow plates 17. A No. 1 connecting sleeve 27 is fixedly installed at one end of the two rotating rings 25, and the two No. 1 connecting sleeves 27 are connected with connecting rods 28 running through the inside, and the two connecting rods 28 are fixedly installed on the outer surfaces of the corresponding injection cylinders 6. The No. 2 motor 21 drives the driving wheel to rotate, so that the belt 24 rotates, and the belt 24 and the rotating ring 25 fit together to rotate the rotating ring 25, so that the rotating ring 25 drives the injection cylinder 6 to rotate through the connecting rod 28.

[0032] like Figure 3 and 4 As shown, the outer surface of the No. 2 motor 21 is sleeved with a No. 2 connecting sleeve 29, and the bottom end of the No. 2 connecting sleeve 29 is fixedly installed on the top of the electric slide 16. The No. 2 motor 21 is supported by the No. 2 connecting sleeve 29, so that the No. 2 motor 21 runs stably.

[0033] like Figure 2 and 4 As shown, the two No. 1 fixing sleeves 4 and the No. 2 fixing sleeve 10 are provided with slopes at opposite ends, and the inner diameters of the two No. 1 fixing sleeves 4 and the No. 2 fixing sleeve 10 gradually increase toward the extrusion plunger 7. The slopes allow the pipe to advance in a relatively smooth channel.

[0034] like Figure 5 and 6 As shown, the outer surfaces of the two No. 1 motors 18 located at the top of one side of the annular hollow plate 17 are both sleeved with stabilizing sleeves, and long plates are fixedly installed on the tops of the two stabilizing sleeves. The two long plates are fixedly installed on the tops of the corresponding annular hollow plates 17. The long plates make the No. 1 motor 18 run stably and prevent the No. 1 motor 18 from vibrating during operation and affecting the equipment.

[0035] like Figure 2 and 4 As shown, one end of each of the four screw rods 19 is fixedly mounted with a fixed platform, wherein the fixed platform at the top is fixedly mounted on the bottom end of the corresponding long board, and the fixed platform at the bottom is fixedly mounted on the top end of the corresponding electric slide 16, so that the slide seat 20 on the screw rod 19 can move stably.

[0036] like Figure 5 and 6 As shown, sealing rings 30 are fixedly installed on the outer surfaces and inner surfaces of the two No. 1 sliding sleeves 5 and the No. 2 sliding sleeve 9, and sealing rings 30 are fixedly installed on both ends of the two injection barrels 6 to prevent the pipe liquid from overflowing from the connection between each component.

[0037] like Figure 2 and 4 As shown, the openings of the two rotating rings 25 are both provided with an inclination angle, and the width of the rotating ring 25 gradually decreases toward the opening of the inner surface of the rotating ring 25, so that when the rotating ring 25 rotates in the annular hollow plate 17, the two ends of the rotating ring 25 are prevented from touching the side of the annular hollow plate 17 during rotation, thereby affecting the rotation of the annular hollow plate 17.

[0038] The present invention also provides a production process using the above-mentioned high-density polyethylene pipe production equipment, the process comprising the following steps:

[0039] Production of pipes: The staff starts the No. 1 extruder 2, and the pipe liquid extruded from the No. 1 extruder 2 is extruded along the direction of the No. 1 fixed ring 3;

[0040] Color mark line liquid preparation: Then the staff starts the No. 2 extruder 14, and the color mark line liquid extruded from the No. 2 extruder 14 enters the two metal hoses 12 through the feed bin 13, and then flows into the injection cylinder 6 through the extrusion plunger 7 for preparation. When the injection cylinder 6 is filled, the No. 2 extruder 14 stops moving;

[0041] Draw the annular color mark line: Then start the No. 2 motor 21, the No. 1 motor 18 and the electric slide 16. The No. 2 motor 21 rotates to drive the driving wheel to rotate, and the driving wheel rotates to drive the belt 24 to rotate, so that the rotating ring 25 that is in contact with the belt 24 rotates. At the same time, the electric slide 16 moves to drive the annular hollow plate 17 to move. The No. 1 motor 18 rotates to drive the extrusion plunger 7 to squeeze closer to the injection cylinder 6. The internal pressure of the injection cylinder 6 is greater than the pressure on the other side of the one-way valve 8, so that the one-way valve 8 opens, so that the color mark line liquid inside the injection cylinder 6 flows out from the one-way valve 8 and mixes with the pipe liquid;

[0042] Reset the annular color mark line device: after the rotating ring 25 rotates one circle, the injection cylinder 6 fits against the extrusion plunger 7, and the one-way valve 8 is closed. At this time, the No. 2 motor 21 is stopped, the No. 1 motor 18 and the electric slide 16 move in the opposite direction, and the No. 1 motor 18 drives the slide 20 to move in the opposite direction, so that the extrusion plunger 7 is separated from the injection cylinder 6. When the extrusion plunger 7 and the injection cylinder 6 move to their original positions, the No. 1 motor 18 and the electric slide 16 are stopped, and then the No. 2 extruder 14 is started to inject and fill the inside of the injection cylinder 6.

[0043] Working principle: the staff starts the No. 1 extruder 2, and the pipe liquid extruded from the No. 1 extruder 2 is extruded along the No. 1 fixed ring 3. When it is necessary to draw a circular color mark line on the pipe, the staff starts the No. 2 extruder 14. The color mark line liquid extruded from the No. 2 extruder 14 enters the metal hoses 12 on both sides through the feed bin 13, and then flows into the injection cylinder 6 through the extrusion plunger 7 for preparation. When the injection cylinder 6 is filled, the No. 2 extruder 14 is stopped, and the No. 2 motor 21, the No. 1 motor 18 and the electric slide 16 are started. The No. 2 motor 21 rotates to drive the driving wheel to rotate, and the driving wheel rotates to drive the belt 24 to rotate, thereby rotating the rotating ring 25 that is in contact with the belt 24. At the same time, the electric slide 16 moves to drive the annular hollow plate 17 to move, and the No. 1 motor 18 rotates so that the two relative slides 20 drive the extrusion plunger 7 to squeeze closer to the injection cylinder 6, and the injection cylinder 6 The internal pressure is greater than the pressure on the other side of the one-way valve 8, so that the one-way valve 8 opens, causing the color-coded liquid inside the syringe 6 to flow out from the one-way valve 8 and mix with the liquid in the pipe. After the rotating ring 25 rotates one circle, the syringe 6 fits against the extrusion plunger 7, and the one-way valve 8 is closed. At this time, the No. 2 motor 21 is stopped, and the No. 1 motor 18 and the electric slide 16 move in the opposite direction. The No. 1 motor 18 drives the slide 20 to move in the opposite direction, so that the extrusion plunger 7 is separated from the syringe 6. When the extrusion plunger 7 and the syringe 6 move to their original positions, the No. 1 motor 18 and the electric slide 16 are stopped. When it is necessary to draw a straight line on the pipe, the No. 2 extruder is started at this time. The pressure extruded by the No. 2 extruder is greater than the pressure extruded by the No. 1 extruder, so that the No. 2 extruder extrude the color-coded liquid into the syringe 6. After it is filled, the one-way valve 8 is pushed open, and the liquid flows from the one-way valve 8 and mixes with the liquid in the pipe to draw a straight line on the outer surface of the pipe.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A high-density polyethylene pipe production equipment, characterized in that: include: A frame (1), wherein a No. 1 extruder (2) is fixedly installed on both sides of the top of the frame (1), a No. 1 fixing ring (3) is fixedly installed on one side of the two extruders, a No. 1 fixing sleeve (4) is fixedly installed on one end of the two No. 1 fixing rings (3), a No. 1 sliding sleeve (5) is slidably installed inside the two No. 1 fixing sleeves (4), an injection cylinder (6) is rotatably installed on one end of the two No. 1 sliding sleeves (5), an extrusion plunger (7) is slidably installed inside the two injection cylinders (6), a one-way valve (8) is provided on one end of the two injection cylinders (6), a No. 2 sliding sleeve (9) is rotatably installed on one end of the two injection cylinders (6), the outer surface of the two No. 2 sliding sleeves (9) is slidably connected to a No. 2 fixing sleeve (10), one end of the two No. 2 fixing sleeves (10) is fixedly installed with a No. 2 fixing ring (11), one end of the two extrusion plungers (7) is fixedly connected to A metal hose (12) is connected, one end of the two metal hoses (12) is fixedly connected to the same feed bin (13), one end of the feed bin (13) is fixedly connected to a No. 2 extruder (14), the bottom end of the No. 2 extruder (14) is fixedly installed in the middle of the top of the frame (1), guide rails (15) are fixedly installed on both sides of the top of the frame (1), the tops of the two guide rails (15) are slidably installed with electric slides (16), the tops of the two electric slides (16) are fixedly installed with an annular hollow plate (17), one side of the two annular hollow plates (17) is fixedly installed with a No. 1 motor (18) at the top and bottom diagonal positions, the output shafts of the four No. 1 motors (18) are fixedly installed with screws (19), the outer surfaces of the four screws (19) are threadedly connected with slide seats (20), and the two slide seats (20) are fixedly installed on the outer surfaces of the corresponding extrusion plungers (7).

2. A high-density polyethylene pipe production equipment according to claim 1, characterized in that: A No. 2 motor (21) is fixedly mounted on one side of the two annular hollow plates (17), and the output shafts of the two No. 2 motors (21) are fixedly connected to a power wheel (22). A plurality of driven wheels (23) are arranged inside the two annular hollow plates (17). The outer surfaces of the two power wheels (22) and two relatively adjacent driven wheels (23) are movably sleeved with a belt (24). The outer surfaces of the two belts (24) are fitted with a rotating ring (25). The inner surfaces of the two rotating rings (25) are fitted with a supporting wheel (26), and the supporting wheel (26) is installed inside the corresponding annular hollow plates (17). A No. 1 connecting sleeve (27) is fixedly mounted on one end of the two rotating rings (25). A connecting rod (28) is penetrated and connected inside the two No. 1 connecting sleeves (27), and the two connecting rods (28) are fixedly mounted on the outer surface of the corresponding injection barrel (6).

3. A high-density polyethylene pipe production equipment according to claim 2, characterized in that: The outer surface of the No. 2 motor (21) is sleeved with a No. 2 connecting sleeve (29), and the bottom end of the No. 2 connecting sleeve (29) is fixedly mounted on the top end of the electric slide (16).

4. A high-density polyethylene pipe production equipment according to claim 2, characterized in that: The two first fixing sleeves (4) and the second fixing sleeve (10) are provided with slopes at opposite ends, and the inner diameters of the two first fixing sleeves (4) and the second fixing sleeve (10) gradually increase toward the extrusion plunger (7).

5. The high-density polyethylene pipe production equipment according to claim 1, characterized in that: The outer surfaces of the two No. 1 motors (18) are sleeved with stabilizing sleeves, the top ends of the two stabilizing sleeves are fixedly mounted with long plates, and the two long plates are fixedly mounted on the top ends of the corresponding annular hollow plates (17).

6. A high-density polyethylene pipe production equipment according to claim 2, characterized in that: One end of each of the four screw rods (19) is fixedly mounted with a fixed platform, wherein the fixed platform at the top end is fixedly mounted on the bottom end of the corresponding long board, and the fixed platform at the bottom end is fixedly mounted on the top end of the corresponding electric slide (16).

7. The high-density polyethylene pipe production equipment according to claim 1, characterized in that: Sealing rings (30) are fixedly mounted on the outer surfaces and inner surfaces of the two first sliding sleeves (5) and the second sliding sleeve (9), and sealing rings (30) are fixedly mounted on both ends of the two injection barrels (6).

8. The high-density polyethylene pipe production equipment according to claim 1, characterized in that: The openings of the two rotating rings (25) are both provided with an inclination angle, and the width of the rotating ring (25) gradually decreases toward the opening of the inner surface of the rotating ring (25).

9. A process for producing a high-density polyethylene pipe using the high-density polyethylene pipe production equipment according to any one of claims 1 to 9, characterized in that: The process includes the following steps: Production of pipes: The staff starts the No. 1 extruder (2), and the pipe liquid extruded from the No. 1 extruder (2) is extruded along the direction of the No. 1 fixing ring (3); Preparation of color code line liquid: Then the staff starts the No. 2 extruder (14), and the color code line liquid extruded from the No. 2 extruder (14) enters the two metal hoses (12) through the feed bin (13), and then flows into the injection cylinder (6) through the extrusion plunger (7) for preparation. When the injection cylinder (6) is filled, the No. 2 extruder (14) stops moving; Drawing an annular color mark line: then start the No. 2 motor (21), the No. 1 motor (18) and the electric slide (16), the No. 2 motor (21) rotates to drive the driving wheel to rotate, the driving wheel rotates to drive the belt (24), thereby causing the rotating ring (25) in contact with the belt (24) to rotate, at the same time the electric slide (16) moves to drive the annular hollow plate (17) to move, the No. 1 motor (18) rotates to drive the extrusion plunger (7) to squeeze closer to the injection cylinder (6), the internal pressure of the injection cylinder (6) is greater than the pressure on the other side of the one-way valve (8), so that the one-way valve (8) opens, so that the color mark line liquid inside the injection cylinder (6) flows out from the one-way valve (8) and mixes with the pipe liquid; Reset the annular color mark line device: after the rotating ring (25) rotates one circle, the injection barrel (6) and the extrusion plunger (7) are fitted, and the one-way valve (8) is closed. At this time, the No. 2 motor (21) is stopped, the No. 1 motor (18) and the electric slide (16) move in the opposite direction, and the No. 1 motor (18) drives the slide (20) to move in the opposite direction, so that the extrusion plunger (7) and the injection barrel (6) are separated. When the extrusion plunger (7) and the injection barrel (6) move to the original position, the No. 1 motor (18) and the electric slide (16) are stopped, and then the No. 2 extruder (14) is started to inject and fill the inside of the injection barrel (6).

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