A forming mechanism and method for three-base composite pipe

Abstract

The present invention relates to the technical field of pipeline forming, specifically a forming mechanism and method for three-base composite pipelines, comprising a base, a frustum fixedly connected to the center position of the upper end of the base, a sleeve ring cover provided on the upper end of the frustum, and two symmetrically arranged side plates on the upper end of the sleeve ring cover, both sides of the two side plates abut against a mold, and the lower ends of the two molds are provided with a support seat slidably connected to the side plates, the upper end of the support seat is fixedly connected to a positioning column, and the outer wall of the positioning column is sleeved with a double-base tube. The present invention scrapes the upper surface of the sol of the floating block to reduce bubbles generated during injection, and at the same time determines whether the injection flow rate is too large by the floating block floating up, and at the same time vibrates the excessive sol to reduce the generation of bubbles, and at the same time clamps and limits the outer surface of the solidified sol by the arc shell, and impacts the upper end of the mold by the floating block, which promotes the separation effect of the mold.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline forming, in particular to a forming mechanism and method for a three-base composite pipeline. Background Art

[0002] Three-base composite pipes are usually composed of three layers of composite materials: inner layer, middle layer and outer layer. The outer layer is cross-linked with resin through hot pressing or curing process, and an integrated pipe structure is formed through sol. Some processes will apply curing material in real time during the winding process, and the material will be evenly penetrated through the extrusion mold.

[0003] However, during the process of injecting glue and cooling the outer protective layer, bubbles are easily generated during the injection process of the sol, which affects the overall quality of the pipeline after molding. At the same time, when the base layer and the middle layer are thin, the injection flow of the outer layer is too large, which will cause the sol to overflow. The injection volume needs to be tested. At the same time, the mold is too tightly adhered to the cooled sol, and forced pulling out can easily damage the solidified sol. Summary of the Invention

[0004] The purpose of the invention is to provide a forming mechanism for a three-base composite pipe to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a forming mechanism for a three-base composite pipe, comprising a base, a frustum fixedly connected to the center position of the upper end of the base, a collar cover sleeved on the upper end of the frustum, two symmetrically arranged side plates on the upper end of the collar cover, both sides of the two side plates abutting against a mold, a support seat slidably connected to the side plates provided at the lower ends of the two molds, a positioning column fixedly connected to the upper end of the support seat, a double-base tube sleeved on the outer wall of the positioning column, demoulding structures capable of driving the mold to slide away from the double-base tube symmetrically provided on both sides of the support seat, and a second cylinder provided on the upper end of the base fixedly connected on both sides of the demoulding structure;

[0006] The upper end of the base is provided with a rotating structure, and the rotating structure can drive the demoulding structure to rotate together, the outer side wall of the rotating structure is fixedly connected to two symmetrically arranged support plates, the upper end of each of the support plates is fixedly connected to a cylinder 1 with an output end facing the mold, the output end of the cylinder 1 is fixedly connected to a square bar, one end of the square bar is fixedly connected to a torsion spring shaft, two rotatable arc shells are symmetrically provided on both sides of the torsion spring shaft, the side surface of the torsion spring shaft is provided with a pushing structure that can push the arc shell to rotate, and the output end of the pushing structure is fixedly connected to a push block;

[0007] The upper end of the cylinder 1 is provided with a glue injection structure, which can inject glue between the mold and the double base tube;

[0008] The lower end of each arc shell is slidably connected to a floating block, the inner cavity top of the arc shell is fixed with two springs, and the side surface of the floating block is provided with a push groove structure, which can be pushed by the push block and drive the floating block to slide upward.

[0009] Preferably, the demolding structure includes two L-shaped positioning plates, and the two L-shaped positioning plates are symmetrically installed on the outer side wall of the support seat. Each of the L-shaped positioning plates is fixed with several electric push rods 2 on one side close to the corresponding position mold, and the output end of each electric push rod 2 is fixed to the corresponding position mold. A rotating ring is commonly sleeved on the outer side walls of the two L-shaped positioning plates, and a positioning block is slidably connected to the outer side wall of the rotating ring, and the lower end of the positioning block is fixed to the output end of cylinder 2.

[0010] Preferably, the rotating structure includes a motor, which is mounted on the upper surface of the cone, a gear is fixed to the output end of the motor, a plurality of teeth are installed in a circle on the inner wall of the upper end of the ring cover, and the teeth are engaged with the gear, and the support plate is mounted on the outer wall of the ring cover.

[0011] Preferably, the pushing structure includes a sliding block, which is sleeved on the outer wall of the square bar, the outer wall of the square bar is fixedly connected to the electric push rod 1, the output end of the electric push rod 1 is fixedly connected to the sliding block, and the sliding block is equipped with two symmetrically arranged movable rods on the side away from the electric push rod 1, and each movable rod is movably connected to the arc shell at the corresponding position, and an adjustment groove for the movable rod to move is provided on the outer wall of each of the arc shells.

[0012] Preferably, the push groove structure includes a movable groove, which is opened through the side surface of each floating block, and each push block is provided with a second bevel on the side close to the movable groove, and a first bevel that can interfere with the second bevel is provided at the groove opening of the movable groove close to the second bevel, and a sliding cavity is opened on the side of the floating block away from the movable rod, and the sliding cavity can be slidably connected to the push block.

[0013] Preferably, the upper surface of each of the floating blocks is provided with a sliding groove connected to the movable groove at the corresponding position, and each sliding groove can be slidably connected to the movable rod at the corresponding position. The inner cavity top of each of the arc shells is provided with a sensor that can be contacted by the floating block, and the sensor is electrically connected to the glue injection structure.

[0014] Preferably, the upper end of each mold is slidably connected to a sliding ring, the lower end of each sliding ring is symmetrically provided with a return spring, both ends of each sliding ring are provided with an electric push block, and each electric push block can conflict with the side surface of the side plate at the corresponding position.

[0015] Preferably, the glue injection structure includes a glue delivery pipe, which is fixed to the upper end of cylinder one and can move between the two molds. An arc tube is fixed to one end of the glue delivery pipe close to the double base tube, and the arc tube can move up and down between the mold and the double base tube.

[0016] In addition, the present invention adopts the following technical solution, and the method for using the forming mechanism of the three-base composite pipe includes the following steps:

[0017] S1. The worker first sets the double base pipe on the outer wall of the positioning column from top to bottom, and then gradually pulls the mold and the double base pipe down together through cylinder 2;

[0018] S2, while the mold and the double-base tube are lowered together, the arc tube continues to inject glue into the cavity between the mold and the double-base tube;

[0019] S3. When the space between the mold and the double-base tube is filled with sol and cooled, the mold is pulled away from the double-base tube by the second electric push rod, and then the staff can take out the formed three-base tube.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By continuously pushing the push groove structure through the electric push rod, the arc shell and the float are pushed to rotate along the torsion spring axis, thereby scratching the upper surface of the sol and reducing the generation of bubbles. At the same time, when the sol is about to overflow, the float rises and the push groove structure pushes the float compression spring and resets the excess sol to impact and vibrate, thereby preventing the problem of excessive sol not being able to be scratched by the float and generating bubbles. At the same time, when the float pushes the compression spring, it will also come into contact with the sensor, thereby allowing the sensor to transmit a signal to the injection structure, causing the injection structure to slow down the injection amount. When the injection is completed and the sol is cooled, the cylinder pushes the arc shell to clamp and position the solidified sol on the outer ring of the double-base tube, and then the float again resists the spring and elastically resets, thereby causing the float to impact and vibrate the upper surface of the mold, thereby promoting the separation of the mold from the sol on the outer wall of the double-base tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and examples:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 A local enlarged view of point A in FIG;

[0025] Figure 3 Schematic diagram of the bottom structure of the arc shell of the present invention;

[0026] Figure 4is a three-dimensional cross-sectional view of the arc shell of the present invention;

[0027] Figure 5 It is a planar cross-sectional view of the circular arc shell of the present invention;

[0028] Figure 6 is a cross-sectional view of a floating plate of the present invention;

[0029] Figure 7 is a cross-sectional view of a square bar of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the present invention with the arc shell removed;

[0031] Figure 9 It is a structural schematic diagram of the sliding ring of the present invention;

[0032] Figure 10 A partial cross-sectional view of the collar cover of the present invention;

[0033] Figure 11 It is a structural schematic diagram of the support base of the present invention;

[0034] Figure 12 It is a schematic diagram of a top view of a partial structure of the mold of the present invention.

[0035] Description of reference numerals:

[0036] 1. Mould; 2. Double base tube; 3. Support plate; 4. Cylinder 1; 5. Rubber hose; 6. Arc tube; 7. Square bar; 8. Sliding block; 9. Electric push rod 1; 10. Movable rod; 11. Torsion spring shaft; 12. Arc shell; 13. Floating block; 14. Spring; 15. Sliding groove; 16. Movable groove; 17. Hypotenuse 1; 18. Push block; 19. Hypotenuse 2; 20. Support seat; 21. Base; 22. Ring cover; 23. Gear; 24. Motor; 25. Gear; 26. Sliding ring; 27. Return spring; 28. Electric push block; 29. ​​Side plate; 30. Cylinder 2; 31. Electric push rod 2; 32. L-shaped positioning plate; 33. Adjusting groove; 34. Sliding cavity; 35. Positioning column; 36. Round table; 37. Rotating ring; 38. Positioning block; 39. Sensor. DETAILED DESCRIPTION

[0037] 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 creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1-12The present invention provides a technical solution: a forming mechanism for a three-base composite pipe, comprising a base 21, a frustum 36 fixedly connected to the center position of the upper end of the base 21, a collar cover 22 sleeved on the upper end of the frustum 36, two symmetrically arranged side plates 29 on the upper end of the collar cover 22, both sides of the two side plates 29 abut against a mold 1, a support base 20 slidably connected to the side plates 29 is provided at the lower end of the two molds 1, a positioning column 35 is fixedly connected to the upper end of the support base 20, the outer wall of the positioning column 35 is sleeved with a double-base pipe 2, demoulding structures capable of driving the mold 1 to slide away from the double-base pipe 2 are symmetrically arranged on both sides of the support base 20, and a cylinder 2 30 arranged on the upper end of the base 21 is fixedly connected on both sides of the demoulding structure;

[0039] A rotating structure is provided at the upper end of the base 21, and the rotating structure can drive the demoulding structure to rotate together. The outer side wall of the rotating structure is fixedly connected to two symmetrically arranged support plates 3. The upper end of each support plate 3 is fixedly connected to a cylinder 1 4 with the output end facing the mold 1. The output end of the cylinder 1 4 is fixedly connected to a square bar 7. One end of the square bar 7 is fixedly connected to a torsion spring shaft 11. Two rotatable arc shells 12 are symmetrically provided on both sides of the torsion spring shaft 11. The side surface of the torsion spring shaft 11 is provided with a pushing structure capable of pushing the arc shell 12 to rotate. The output end of the pushing structure is fixedly connected to a push block 18.

[0040] The upper end of the cylinder 1 4 is provided with a glue injection structure, which can inject glue between the mold 1 and the double base tube 2;

[0041] The lower end of each arc shell 12 is slidably connected to a float 13. Two springs 14 are fixed to the top of the inner cavity of the arc shell 12. The side surface of the float 13 is provided with a push groove structure. The push groove structure can be pushed by the push block 18 and drive the float 13 to slide upward. Figure 12 , wherein the side plate 29 , the mold 1 and the sliding ring 26 are all arc-shaped, and the side plate 29 is always in contact with the side surface of the mold 1 .

[0042] Specifically, the top of the side plate 29 is always five centimeters lower than the bottom of the bottom of the arc shell 12. When the bottom of the float 13 is pushed by the buoyancy of the sol to be flush with the bottom of the bottom of the arc shell 12, the float 13 will contact the spring 14. The pushing structure can push the arc shell 12 to rotate slightly along the axis of the torsion spring shaft 11, and then reset through the elastic restoring force of the torsion spring shaft 11. During the rotation of the arc shell 12, the float 13 will also move together, so that the float 13 can stir and flatten the top layer of sol, and at the same time, scrape the bubbles generated by the sol. When there is too much sol, it will push the float 13 to float up. 13 is in contact with the spring 14, and the cylinder 2 30 can drive the mold 1, the support seat 20 and the double-base tube 2 to descend synchronously through the connection with the demoulding structure. The mold 1 and the support seat 20 are sealed. During the descending process of the mold 1, the support seat 20 and the double-base tube 2, the glue injection structure will continue to inject glue into the cavity between the double-base tube 2 and the mold 1. During the glue injection process, the mold 1 is used as a reference point, and the mold 1 continues to move downward. The position of the side plate 29 remains unchanged, which will cause the side plate 29 to gradually cover the gap between the two molds 1 from bottom to top, thereby preventing the sol from overflowing when injecting glue into the cavity between the mold 1 and the double-base tube 2.

[0043] Among them, the demolding structure includes two L-shaped positioning plates 32, and the two L-shaped positioning plates 32 are symmetrically installed on the outer wall of the support seat 20. Each L-shaped positioning plate 32 is fixedly connected to a plurality of electric push rods 2 31 on one side close to the corresponding position mold 1, and the output end of each electric push rod 2 31 is fixedly connected to the corresponding position mold 1. A rotating ring 37 is commonly sleeved on the outer wall of the two L-shaped positioning plates 32, and a positioning block 38 is slidably connected to the outer wall of the rotating ring 37, and the lower end of the positioning block 38 is fixedly connected to the output end of the cylinder 2 30.

[0044] Specifically, when the sol between the mold 1 and the double-base tube 2 is filled and cooled, the mold 1 at the corresponding position can be pushed away from the double-base tube 2 by the electric push rod 2 31, so that the mold 1 is away from the solidified sol, which makes it easier for the staff to take out the double-base tube 2 and the sol solidified on the outer surface of the double-base tube 2. At the same time, during the injection process, when the rotating structure drives the floating block 13 to rotate around the double-base tube 2, the mold 1 is also driven to rotate through the interference between the two sides of the sliding block 8 and the mold 1. At the same time, the mold 1 causes the rotating ring 37 to rotate between the two positioning blocks 38. As a result, during the injection process, the sol will shake slightly due to inertia, making it easier to lay the glue flat.

[0045] Among them, the rotating structure includes a motor 24, which is installed on the upper surface of the truncated table 36. The output end of the motor 24 is fixedly connected to a gear 25. A plurality of teeth 23 are installed in a circle on the inner wall of the upper end of the ring cover 22, and the teeth 23 are engaged with the gear 25. The support plate 3 is installed on the outer wall of the ring cover 22.

[0046] Specifically, the motor 24 drives the gear 25 to rotate. During the rotation of the gear 25, the ring cover 22 is driven to rotate by engaging with the teeth 23. During the rotation of the outer wall of the table 36, the ring cover 22 drives the two support plates 3 to rotate around the table 36, thereby driving the rubber delivery pipe 5 at the upper end of the support plate 3 to rotate around the double base pipe 2.

[0047] Among them, the pushing structure includes a sliding block 8, which is sleeved on the outer wall of the square bar 7. The outer wall of the square bar 7 is fixedly connected to an electric push rod 9, and the output end of the electric push rod 9 is fixedly connected to the sliding block 8. The sliding block 8 is installed on the side away from the electric push rod 9 with two symmetrically arranged movable rods 10, and each movable rod 10 is movably connected to the arc shell 12 at the corresponding position, and each arc shell 12 is provided with an adjustment groove 33 for the movable rod 10 to move on the outer wall.

[0048] Among them, the push groove structure includes a movable groove 16, which is opened through the side surface of each floating block 13. Each push block 18 is provided with a second bevel 19 on the side close to the movable groove 16. The movable groove 16 is provided with a bevel 17 at the notch close to the second bevel 19, which can interfere with the second bevel 19. The floating block 13 is provided with a sliding cavity 34 on the side away from the movable rod 10, and the sliding cavity 34 can be slidably connected with the push block 18.

[0049] Among them, the upper surface of each floating block 13 is provided with a sliding groove 15 connected to the movable groove 16 at the corresponding position, and each sliding groove 15 can be slidably connected to the movable rod 10 at the corresponding position. The inner cavity top of each arc shell 12 is provided with a sensor 39 that can contact the floating block 13, and the sensor 39 is electrically connected to the glue injection structure.

[0050] Specifically, during the process of injecting glue into the cavity between the double base tube 2 and the mold 1, the push block 18 will contact the outer wall of the floating block 13, and the electric push rod 9 will push the sliding block 8 to slide on the outer wall of the square bar 7. The sliding block 8 will then push the movable rod 10 and the push block 18 to push the floating block 13. Figure 7The outer wall of the arc shell 12 is provided with an adjustment groove 33 for the movable rod 10 to slide horizontally, so that when the floating block 13 and the arc shell 12 rotate slightly around the torsion spring shaft 11, the movable rod 10 can slide inside the adjustment groove 33 to adapt to the position change caused by the rotation of the arc shell 12, thereby increasing the scraping area of ​​the floating block 13 on the upper surface of the sol. If the injection flow rate is too large, it will cause the floating block 13 to float upward, so that the floating block 13 comes into contact with the spring 14, and at the same time, the bevel 19 on the push block 18 comes into contact with the bevel 17 on the movable groove 16. At this time, the bevel 19 19 and the bevel of the bevel 17 17 come into contact, which will push the floating block 13 to slide further upward, so that the spring 14 is compressed and stored, and the floating block 13 When contact is made with the sensor 39, the sensor 39 is sensed and a signal is transmitted through the electrical connection, causing the injection structure to reduce the injection amount in a short time, so that the height of the sol can only scrape against the lower surface of the float 13. At the same time, when the amount of sol between the mold 1 and the double-base tube 2 is high, the float 13 cannot scrape the sol better. As the push block 18 slides inside the sliding groove 15, when the push block 18 slides to the inside of the sliding cavity 34, the upper end of the push block 18 will no longer resist the inner cavity top of the sliding groove 15, and the spring 14 will release the elastic restoring force, thereby pushing the float 13 to perform elastic reset, so that the float 13 hits the upper surface of the sol, causing the sol to vibrate, so that when there is too much sol, the vibration can promote the flattening of the sol and reduce the generation of bubbles.

[0051] Among them, the upper end of each mold 1 is slidably connected to a sliding ring 26, and the lower end of each sliding ring 26 is symmetrically provided with a return spring 27. Both ends of each sliding ring 26 are provided with an electric push block 28, and each electric push block 28 can conflict with the side surface of the side plate 29 at the corresponding position. When the upper end of the sliding ring 26 is not subjected to pressure and the sliding ring 26 slides downward, the electric push block 28 will be electrically driven to be pushed out, so that the electric push block 28 is vertically flush with the side surface of the sliding ring 26, and the lower end of the electric push block 28 conflicts with the upper end of the mold 1.

[0052] Among them, the glue injection structure includes a glue delivery pipe 5, which is fixed to the upper end of the cylinder 4, and the glue delivery pipe 5 can move between the two molds 1. The end of the glue delivery pipe 5 close to the double base tube 2 is fixed with an arc tube 6, and the arc tube 6 can move up and down between the mold 1 and the double base tube 2.

[0053] Specifically, the end of the glue delivery pipe 5 away from the arc pipe 6 can be connected to the glue injection pipe, so as to inject glue into the cavity between the mold 1 and the double base pipe 2. Figure 2The mouth of the arc tube 6 is located in the area between the arc shells 12 on both sides of the double base tube 2, so that when the glue is injected, it will not affect the scraping of the sol by the float 13. After the sol between the mold 1 and the double base tube 2 is filled, the mold 1 needs to be demoulded so that the mold 1 is away from the position of the double base tube 2. The electric push block 28 first slides into the interior of the sliding ring 26. At this time, the float 13 and the arc shell 12 are both above the sliding ring 26. At this time, the cylinder 14 pushes the arc shell 12 and the float 13 in the direction away from the double base tube 2, so that the float 13 is located directly above the sliding ring 26 at the corresponding position. At this time, the electric push block 28 slides into the cavity of the sliding ring 26, and then the cylinder 2 30 is used again to push the arc shell 12 and the float 13 away from the double base tube 2. The demoulding structure is lifted, so that the sliding ring 26 contacts and pushes the lower end of the float 13, and the float 13 is pushed into the cavity of the arc shell 12. At the same time, the sliding ring 26 slides downward into the slide groove of the mold 1, so that the lower surface of the float 13 contacts the upper end of the mold 1. At this time, the cylinder 14 pushes the arc shell 12 again to clamp and limit the solidified sol on the outer ring of the double base tube 2. Then, when the bevel 19 pushes the push block 18 to contact the movable groove 16 again, the bevel 17 and the bevel 2 will contact each other, and the float 13 will continue to be elastically reset by the compression spring 14, thereby impacting the mold 1, causing the mold 1 to vibrate, thereby promoting the separation of the mold 1 from the solid sol on the outer ring of the double base tube 2.

[0054] A method for using a forming mechanism for a three-base composite pipe comprises the following steps:

[0055] S1. The worker first sets the double base tube 2 on the outer wall of the positioning column 35 from top to bottom, and then gradually pulls the mold 1 and the double base tube 2 down together through the cylinder 2 30.

[0056] S2. While the mold 1 and the double-base tube 2 descend together, the arc tube 6 continues to inject glue into the cavity between the mold 1 and the double-base tube 2.

[0057] S3. When the space between the mold 1 and the double-base tube 2 is filled with sol and cooled, the mold 1 is pulled away from the double-base tube 2 by the electric push rod 2 31, and then the staff can take out the formed triple-base tube.

[0058] Working principle: The worker first sets the double-base tube 2 on the outer wall of the positioning column 35 from top to bottom, and then the glue injection structure continues to inject glue into the cavity between the mold 1 and the double-base tube 2. At the same time, the cylinder 2 30 drives the demoulding structure to continue to descend, so that the side plate 29 can fill the space between the two molds 1 while injecting glue to prevent glue from overflowing. Then the rotating structure drives the demoulding structure and the square bar 7 to rotate around the double-base tube 2. The electric push rod 9 installed on the outer wall of the square bar 7 will continuously push the push groove structure to make the arc shell 12 and the floating block 13 be pushed to rotate along the torsion spring shaft 11, thereby scratching the upper surface of the sol to reduce the generation of bubbles. At the same time, when the sol is about to overflow, the floating block 13 floats up The push groove structure pushes the float 13 to compress the spring 14, and resets it to impact and vibrate the excessive sol, thereby preventing the excessive sol from being scratched by the float 13 and generating bubbles. At the same time, when the float 13 pushes the compressed spring 14, it will also come into contact with the sensor 39, so that the sensor 39 transmits a signal to the injection structure, so that the injection structure slows down the injection amount. When the injection is completed and the sol is cooled, the cylinder 14 pushes the arc shell 12 to clamp and position the solidified sol on the outer ring of the double-base tube 2, and then the float 13 contacts the spring 14 again and resets it elastically, so that the float 13 impacts and vibrates the upper surface of the mold 1, thereby promoting the separation of the mold 1 from the sol on the outer wall of the double-base tube 2.

[0059] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A forming mechanism for a three-base composite pipe, comprising a base (21), characterized in that: A truncated cone (36) is fixedly connected to the center position of the upper end of the base (21), and a collar cover (22) is sleeved on the upper end of the truncated cone (36). The upper end of the collar cover (22) is provided with two symmetrically arranged side plates (29), and both sides of the two side plates (29) are in contact with a mold (1). The lower ends of the two molds (1) are provided with a support seat (20) slidably connected to the side plates (29), and the upper end of the support seat (20) is fixedly connected with a positioning column (35), and the outer wall of the positioning column (35) is sleeved with a double base tube (2). Demolding structures capable of driving the mold (1) to slide in a direction away from the double base tube (2) are symmetrically provided on both sides of the support seat (20), and the two sides of the demoulding structure are fixedly connected with cylinder 2 (30) arranged on the upper end of the base (21); The upper end of the base (21) is provided with a rotating structure, and the rotating structure can drive the demoulding structure to rotate together, the outer side wall of the rotating structure is fixedly connected to two symmetrically arranged support plates (3), the upper end of each support plate (3) is fixedly connected to a cylinder (4) with an output end facing the mold (1), the output end of the cylinder (4) is fixedly connected to a square bar (7), one end of the square bar (7) is fixedly connected to a torsion spring shaft (11), two rotatable arc shells (12) are symmetrically provided on both sides of the torsion spring shaft (11), the side surface of the torsion spring shaft (11) is provided with a pushing structure capable of pushing the arc shell (12) to rotate, and the output end of the pushing structure is fixedly connected to a push block (18); The upper end of the cylinder 1 (4) is provided with a glue injection structure capable of injecting glue between the mold (1) and the double base tube (2); The lower end of each arc shell (12) is slidably connected to a floating block (13), and two springs (14) are fixed to the top of the inner cavity of the arc shell (12). The side surface of the floating block (13) is provided with a push groove structure, and the push groove structure can be pushed by the push block (18) and drive the floating block (13) to slide upward.

2. A forming mechanism for a three-base composite pipe according to claim 1, characterized in that: The demoulding structure includes two L-shaped positioning plates (32), and the two L-shaped positioning plates (32) are symmetrically installed on the outer wall of the support seat (20). Each of the L-shaped positioning plates (32) is fixed with a plurality of electric push rods (31) on one side close to the corresponding position mold (1), and the output end of each electric push rod (31) is fixed with the corresponding position mold (1). A rotating ring (37) is commonly sleeved on the outer wall of the two L-shaped positioning plates (32), and a positioning block (38) is slidably connected to the outer wall of the rotating ring (37), and the lower end of the positioning block (38) is fixed with the output end of the cylinder (30).

3. The forming mechanism for a three-base composite pipe according to claim 1, characterized in that: The rotating structure includes a motor (24), the motor (24) is mounted on the upper surface of the truncated table (36), the output end of the motor (24) is fixedly connected to a gear (25), a plurality of teeth (23) are mounted in a circle on the inner side wall of the upper end of the collar cover (22), and the teeth (23) are meshed with the gear (25), and the support plate (3) is mounted on the outer side wall of the collar cover (22).

4. The forming mechanism for a three-base composite pipe according to claim 3, characterized in that: The pushing structure includes a sliding block (8), which is sleeved on the outer wall of the square bar (7), and the outer wall of the square bar (7) is fixedly connected to an electric push rod (9), and the output end of the electric push rod (9) is fixedly connected to the sliding block (8). Two symmetrically arranged movable rods (10) are installed on the side of the sliding block (8) away from the electric push rod (9), and each movable rod (10) is movably connected to the arc shell (12) at the corresponding position, and an adjustment groove (33) for the movable rod (10) to move is opened on the outer wall of each arc shell (12).

5. The forming mechanism for a three-base composite pipe according to claim 1, characterized in that: The push groove structure includes a movable groove (16), the movable groove (16) is opened through the side surface of each floating block (13), each push block (18) is provided with a second bevel (19) on the side close to the movable groove (16), and the movable groove (16) is provided with a first bevel (17) capable of contacting the second bevel (19) at the notch close to the second bevel (19), and the floating block (13) is provided with a sliding cavity (34) on the side away from the movable rod (10), and the sliding cavity (34) can be slidably connected with the push block (18).

6. The forming mechanism for a three-base composite pipe according to claim 5, characterized in that: The upper surface of each of the floating blocks (13) is provided with a sliding groove (15) connected to the movable groove (16) at the corresponding position, and each sliding groove (15) can be slidably connected to the movable rod (10) at the corresponding position. The inner cavity top of each of the arc shells (12) is provided with a sensor (39) that can be contacted by the floating block (13), and the sensor (39) is electrically connected to the injection structure.

7. The forming mechanism for a three-base composite pipe according to claim 1, characterized in that: The upper end of each mold (1) is slidably connected to a sliding ring (26), the lower end of each sliding ring (26) is symmetrically provided with a return spring (27), and both ends of each sliding ring (26) are provided with an electric push block (28), and each electric push block (28) can conflict with the side surface of the side plate (29) at the corresponding position.

8. The forming mechanism for a three-base composite pipe according to claim 1, characterized in that: The glue injection structure includes a glue delivery pipe (5), which is fixed to the upper end of the cylinder (4) and can move between the two molds (1). The glue delivery pipe (5) is fixed to an arc tube (6) at one end close to the double-base tube (2), and the arc tube (6) can move up and down between the mold (1) and the double-base tube (2).

9. A method for using a forming mechanism for a three-base composite pipe, characterized in that: The method is based on a forming mechanism for a three-base composite pipe according to any one of claims 1 to 8, and comprises the following steps: S1. The worker first sets the double base tube (2) on the outer wall of the positioning column (35) from top to bottom, and then gradually pulls the mold (1) and the double base tube (2) down together through the cylinder 2 (30); S2, while the mold (1) and the double-base tube (2) are lowered together, the arc tube (6) continuously injects glue into the cavity between the mold (1) and the double-base tube (2); S3. When the space between the mold (1) and the double-base tube (2) is filled with the sol and cooled, the mold (1) is pulled away from the double-base tube (2) by the second electric push rod (31), and then the staff can take out the formed three-base tube.

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