WO2023103108A1

WO2023103108A1 - Forming device for continuous fiber reinforced composite pipe

Info

Publication number: WO2023103108A1
Application number: PCT/CN2021/141392
Authority: WO
Inventors: 汪鹏跃; 陈卫; 黄剑; 周章湧; 李海超; 李辉; 翁志浩
Original assignee: 公元股份有限公司
Priority date: 2021-12-10
Filing date: 2021-12-25
Publication date: 2023-06-15
Also published as: CN114193805A; CN114193805B

Abstract

A forming device for a continuous fiber reinforced composite pipe, relating to the technical field of composite pipelines, and comprising a forming mold (1) and an outer pipe (2), wherein a forming cavity channel (1c) is formed between an outer mold sleeve (1a) and a core mold (1b) of the forming mold (1); one end of the outer pipe (2) extends into the outer mold sleeve (1a) from the front port of the outer mold sleeve (1a); an annular cavity channel (1d) through which fibers pass is formed between the outer circumferential wall of the outer pipe (2) and the inner circumferential wall of the outer mold sleeve (1a); a cylindrical supporting cylinder (1e) sleeved outside the core mold (1b) is arranged in the forming cavity channel (1c); material passing holes (1e1) are formed on the supporting cylinder (1e) in a distributed mode; a gap is formed between the outer circumferential wall of the supporting cylinder (1e) and the inner circumferential wall of the outer mold sleeve (1a); and a feeding channel used for injecting a molten material into the supporting cylinder (1e) is further formed in the outer pipe (2). According to the present forming device for the continuous fiber reinforced composite pipe, a composite pipeline produced by the forming device has the advantages of being high in strength and good in toughness.

Description

Forming equipment for continuous fiber reinforced composite pipe

technical field

The invention belongs to the technical field of composite pipes and relates to a forming device for continuous fiber reinforced composite pipes.

Background technique

With the continuous expansion of cities and the continuous extraction of oil and natural gas, the demand for transportation pipelines is also increasing. Traditional steel pipes have poor corrosion resistance and are not easy to handle, so they can no longer meet the current needs. At the same time, my country's main oil and natural gas are mostly distributed in deserts, swamps or mountainous areas, and the natural environment is relatively harsh. When laying steel pipelines, it is seriously affected by the natural environment, and due to ground subsidence, landslides and other reasons, the pipelines are extremely prone to damage. Phenomenon. Due to its low density, high strength, and excellent mechanical properties, such as good processing performance, good chemical resistance and heat resistance, fiber reinforced composite pipes can still be used stably for a long time in some complex environments. Therefore, it is widely used.

Existing fiber-reinforced composite pipes are mainly continuous fiber-reinforced composite pipes. At present, when continuous fiber-reinforced composite pipes are manufactured, the conventional technology is to first extrude the tube blank through an extruder, and then wind the reinforcing fiber on the tube blank through a winding machine. surface, and bonded by adhesive to form a reinforced fiber composite pipe. For example, a plastic pipe forming line disclosed in Chinese patent literature (application number: 201811640324.6; application publication number: CN109664479A). The composite pipe produced by this manufacturing process needs to be wound in multiple layers to ensure that the prepared pipe reaches the required strength. However, due to the small thickness of the continuous fiber, the bonding layer formed by directly winding the surface of the inner pipe is very small, and at the same time The sequential winding of fibers in each layer often results in limited or no bonding in the area where the fibers are in contact, resulting in weak bonding between layers and limited improvement in the quality, especially the strength, of the composite pipe.

In addition, in addition to continuous reinforced fiber composite pipes, there are also fiber reinforced composite pipes that form a multilayer structure by mixing chopped fibers into a hot melt and performing multilayer co-extrusion. For example, a co-extrusion die for rodent-resistant silicon core tubes disclosed in Chinese patent literature (application number: 202022849645.6), connects a confluent core at the front side of the forming core, so that the rodent-resistant silicon core tubes produced have a three-layer structure; The proportion of glass fiber contained in the layer and the inner layer is relatively small, and the proportion of glass fiber contained in the middle layer is relatively large, so that the mouse-proof silicon core tube can ensure good mechanical properties. Due to the characteristics of the mold structure, the co-extrusion of the continuous fiber composite pipe cannot be realized, but the chopped fibers can only be mixed into the hot melt for multi-layer co-extrusion to form a multi-layer fiber-reinforced composite pipe. For composite pipes, the pipe performance, especially the difference in shear strength, is more obvious.

Contents of the invention

The purpose of the present invention is to solve the above problems in the existing technology, and propose a continuous fiber reinforced composite pipe forming equipment. The technical problem solved by the present invention is: how to improve the strength of the fiber reinforced composite pipe.

The purpose of the present invention can be achieved through the following technical solutions: a continuous fiber reinforced composite pipe forming equipment, including a forming mold, a forming cavity is formed between the outer mold cover and the core mold of the forming mold, and it is characterized in that, The molding equipment also includes an outer tube, one end of the outer tube extends into the outer mold cover through the front port of the outer mold cover, and a hole for fibers to pass through is formed between the outer peripheral wall of the outer tube and the inner peripheral wall of the outer mold cover. An annular cavity, the forming cavity is provided with a cylindrical support tube sleeved outside the mandrel, the support tube is provided with feeding holes all over, the outer peripheral wall of the support tube and the outer mold sleeve There is a gap between the inner peripheral walls, and the outer tube is also provided with a feed channel for injecting molten material into the support cylinder.

In the process of pipeline production, it is necessary to use the tractor to pull the formed pipeline forward so that the pipeline can continuously protrude from the forming mold to realize continuous production. The molding equipment is provided with an outer tube. During manufacture, the continuous reinforcing fiber is wound on the outer peripheral wall of the outer tube by relying on the existing fiber winding device such as a winding machine. An annular cavity is formed between the surrounding walls for the reinforcing fiber to pass through. Therefore, under the action of the tractor, the reinforcing fiber will continuously pass through the forming cavity of the forming mold, and after reaching the rear end of the supporting cylinder and detaching from the supporting cylinder, it will be separated from the supporting cylinder. The molten materials intersect to form a composite state, and finally form a fiber-reinforced composite pipe that protrudes from the rear end of the forming mold, passes through the sizing cooling equipment, and then connects to the tractor.

In this molding equipment, by setting the supporting cylinder in the molding channel, there is a gap between the outer peripheral wall of the supporting cylinder and the inner peripheral wall of the outer mold casing. This design makes the supporting cylinder support the reinforcing fiber on the one hand, so that the reinforcing fiber is along the It moves along the outer peripheral wall of the support cylinder in a straight line to improve the forming quality of the pipe. In addition, there are feed holes all over the support cylinder, and the feed channel injects the molten material into the support cylinder, so part of the molten material will flow through the feed holes, similar to the situation where the water in the water pipe suddenly flows through a small hole and is discharged. The flow of molten material through the material hole will form a greater pressure, which can enhance the fluidity and plasticizing effect of the molten material. Before the reinforcing fiber reaches the rear end of the support cylinder and meets the molten material to recombine, the molten material can flow through the material hole and penetrate into the The interior of the reinforcing fiber is pre-soaked to the reinforcing fiber, so that the composite effect of the molten material and the reinforcing fiber is better, thereby improving the quality and strength of the product.

In addition, the forming equipment of this continuous fiber reinforced composite pipe is completely different from the production principle of the existing equipment. This forming equipment does not first extrude the tube blank through the extruder, and then wind the reinforcing fiber on the surface of the tube blank through the winding machine. Instead, the molten material and the continuous reinforcing fiber are formed into a composite pipe in one step in the molding mold, so that the molten material can be compatible and infiltrated with the reinforcing fiber in the molding mold, so the bonding effect is better, the strength is higher, and there is no The composite pipe produced by the existing equipment has the problem that the strength of the pipe is weakened due to weak bonding between layers.

In the above-mentioned continuous fiber reinforced composite pipe forming equipment, there is a gap between the outer peripheral wall of the mandrel and the inner peripheral wall of the supporting cylinder, the supporting cylinder is arranged concentrically with the outer mold sleeve, and the outer peripheral wall of the supporting cylinder flush with the peripheral wall of the outer tube. There is a gap between the outer peripheral wall of the mandrel and the inner peripheral wall of the support tube, so that the molten material can flow through the gap smoothly, reach the rear end of the support tube and meet and compound with the reinforcing fibers, and part of the molten material passes through the support tube. The feed holes pre-wet the reinforcing fibers. The supporting cylinder and the outer mold sleeve are coaxially arranged, and the outer peripheral wall of the supporting cylinder is flush with the outer peripheral wall of the outer tube, so that the moving process of the reinforcing fiber in the forming mold is smooth, thereby ensuring the quality of the processed product.

In the molding equipment of the above-mentioned continuous fiber reinforced composite pipe, the molding equipment also includes an extruder, the outer tube is pierced with a core tube connected with the extruder, and the inner hole of the core tube is the above-mentioned inlet The front end of the mandrel is connected to a flow divider, the support cylinder is fixedly connected to the flow divider, and the outlet of the core tube is directly opposite to the flow divider. The molten material extruded by the extruder is delivered to the molding die through the core tube located in the outer tube, and such a delivery method will not affect the winding of the reinforcing fiber on the outer peripheral wall of the outer tube. The outlet of the core tube is directly opposite to the splitter, so that the splitter can diffuse the molten material flowing out of the core tube radially to the surroundings, which facilitates the heating and plasticization of the molten material, improves the bonding effect of the reinforcing fiber and the molten material, and then improves the strength of the pipeline .

In the above-mentioned continuous fiber reinforced composite pipe forming equipment, the outlet end of the core pipe is also fixedly provided with a connecting sleeve, the outer peripheral wall of the connecting sleeve is against the inner peripheral wall of the outer pipe, and the flow divider passes through the tight The firmware is fixedly connected to the connecting sleeve. Through this design, on the one hand, the stability of the outlet end of the core tube is ensured, and on the other hand, the installation of the flow divider and the support cylinder is realized, so that the outer peripheral walls of the flow divider and the support cylinder are formed with the inner peripheral wall of the outer mold casing for reinforcing fiber through the gap. Preferably, the connecting sleeve is provided with eight bolt through holes along its circumference, and the shunt is provided with eight bolt holes corresponding to the bolt through holes one by one, and each bolt through hole is pierced with a bolt. The bolts pass through the bolt through holes and are threadedly connected with the corresponding bolt holes.

In the above-mentioned continuous fiber-reinforced composite pipe forming equipment, the flow divider includes a cylindrical connection part and a splitter column arranged in the inner hole of the connection part, the splitter column is coaxially arranged with the connection part, and the The splitter column and the connection part are connected by several connecting pieces, and the front end of the splitter column has a splitter cone, and the splitter cone is opposite to the outlet of the core tube. The molten material flowing out of the core tube is first diffused radially to the surrounding by the action of the splitter cone, and then by the action of the connecting piece to break up the molten material, so that the plasticizing effect of the molten material is further improved, and then the reinforcing fiber and The bonding effect of the molten material ensures the strength of the composite pipe.

In the above-mentioned molding equipment for continuous fiber reinforced composite pipe, the outer peripheral wall of the connecting part is provided with an annular stepped surface along the circumferential direction, the front end of the support cylinder is fixedly sleeved on the annular stepped surface, and the support cylinder The outer peripheral wall and the outer peripheral wall of the connection part are flush with each other. The supporting cylinder needs to be set in the air relative to the outer mold sleeve. At this time, an annular stepped surface is provided on the outer peripheral wall of the connecting part along the circumferential direction, which not only meets the installation of the supporting cylinder, but also ensures the stability of the installation. The peripheral wall of the supporting cylinder, the peripheral wall of the outer tube and the peripheral wall of the connection part are flush with each other, so that the process of moving the reinforcing fiber in the forming mold is smooth, avoiding the scratching and damage of the reinforcing fiber, and thus ensuring the quality of the processed product.

In the above-mentioned molding equipment for continuous fiber reinforced composite pipe, the core mold includes a main body section, a conical splitter section connected to the front end of the main section and a sizing section connected to the rear end of the main section, and the outer diameter of the main section is less than The outer diameter of the sizing section, the support sleeve is sleeved on the outside of the main body section of the mandrel and the tapered splitter section. Usually the forming mold has its own heating element, and the conical splitter section can further spread the molten material flowing out of the core tube radially to the surroundings, making the molten material into a thin ring shape, thereby further heating and plasticizing, and improving the strength of the reinforcing fiber and the molten material. The combination effect, thereby improving the strength of the pipeline. The outer diameter setting of the sizing section ensures that the composite pipe has the required inner diameter after forming, and the outer diameter of the main section is smaller than that of the sizing section, so that the gap between the main section and the support cylinder is relatively large, thereby ensuring that the molten material The flow rate ensures that the reinforcing fiber is fully compounded with the molten material, thereby ensuring the strength of the product.

In the above-mentioned continuous fiber-reinforced composite pipe forming equipment, the main body section and the sizing section are connected by an arc-shaped transition surface, and the rear end of the support cylinder is adjacent to the arc-shaped transition surface. After the reinforcing fiber reaches the rear end of the support cylinder, it will break away from the support cylinder and compound with the molten material there, and then protrude from between the sizing section and the outer mold sleeve. At this time, the design of the arc-shaped transition surface can not only To ensure that the composite pipe stretches out of the mold smoothly, and at the same time scrape off the excess molten material on the reinforcing fiber to improve the quality of the product.

In the above-mentioned continuous fiber reinforced composite pipe forming equipment, a central hole is opened on the conical splitter section of the mandrel, the rear end of the splitter column is plugged into the central hole, and the central hole is pierced with Bolts that are screwed to the splitter column and securely connect the mandrel to the splitter column. Similarly, due to the special production method of the forming mold, the core mold also needs to be suspended relative to the outer mold sleeve, and the installation method of the core mold of the traditional forming mold obviously cannot meet this requirement. In view of this, this molding equipment opens a center hole on the core mold, inserts the rear end of the shunt column into the center hole, and then fixes it with bolts. This design can not only meet the installation requirements of the core mold suspended in the air, but also ensure its The installation is stable.

Compared with the prior art, the forming equipment of the continuous fiber reinforced composite pipe has the following advantages:

1. In this molding equipment, by setting a support cylinder in the forming cavity, the support cylinder forms a support for the reinforcing fiber on the one hand, so that the reinforcing fiber moves straight along the outer peripheral wall of the support cylinder, improving the molding quality of the pipe. In addition, the supporting cylinder with feeding holes all over can also enhance the fluidity and plasticizing effect of the molten material. Before the reinforcing fiber reaches the rear end of the supporting cylinder and meets the molten material to recombine, the molten material can flow through the material holes and penetrate into the reinforcement. Inside the fiber, the reinforcing fiber is pre-soaked, so that the composite effect of the molten material and the reinforcing fiber is better, so that the produced composite pipe has a higher structural strength.

2. The molding equipment of this composite pipe is formed into a composite pipe by one-step molding of the molten material and continuous reinforcing fibers in the molding mold, so that the molten material can be compatible and infiltrated with the reinforcing fibers in the molding mold, so the bonding effect is better. The strength is higher, and there is no problem that the strength of the pipeline is weakened due to the weak interlayer bonding existing in the composite pipeline produced by the existing equipment.

Description of drawings

Fig. 1 is a cross-sectional view of a molding die in the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the support cylinder.

Fig. 3 is a schematic diagram of the three-dimensional structure of the splitter.

Fig. 4 is a three-dimensional structural schematic diagram of the composite pipe forming equipment.

Fig. 5 is a partial sectional view of the composite pipe forming equipment.

In the figure, 1. Forming mold; 1a, outer mold sleeve; 1a1, front port; 1b, mandrel; 1b1, main body section; 1b2, conical splitter section; 1b3, sizing section; , central hole; 1c, forming cavity; 1d, annular cavity; 1e, support cylinder; 1e1, feeding hole; 1f, diverter; 1f1, connecting part; cone; 1f5, annular step surface; 2, outer tube; 3, core tube; 31, feed channel; 4, extruder; 5, winding machine; 6, connecting sleeve; 7, fastener; 8, bolt Holes; 9, bolts.

Detailed ways

The following is a specific embodiment of the present invention and in conjunction with the accompanying drawings, further describes the technical solution of the present invention, but the present invention is not limited to this embodiment.

The molding equipment of this composite pipe includes molding die 1, winding machine 5, extruder 4 etc., as shown in Fig. The molding equipment also includes an outer tube 2, one end of the outer tube 2 extends into the outer mold cover 1a from the front port 1a1 of the outer mold cover 1a, and a reinforcing fiber is formed between the outer peripheral wall of the outer tube 2 and the inner peripheral wall of the outer mold cover 1a. Through the annular cavity 1d, the forming cavity 1c is provided with a cylindrical support tube 1e sleeved on the outside of the mandrel 1b, as shown in Figure 2, the support tube 1e is provided with feeding holes 1e1 all over, supporting There is a gap between the outer peripheral wall of the cylinder 1e and the inner peripheral wall of the outer mold casing 1a, there is a gap between the outer peripheral wall of the core mold 1b and the inner peripheral wall of the support cylinder 1e, and the support cylinder 1e is coaxially arranged with the outer mold casing 1a, and The outer peripheral wall of the support cylinder 1 e is flush with the outer peripheral wall of the outer tube 2 . There is a gap between the outer peripheral wall of the mandrel 1b and the inner peripheral wall of the support cylinder 1e, so that the molten material can flow through the gap smoothly, reach the rear end of the support cylinder 1e, meet and compound with the reinforcing fibers, and part of the molten material passes through the support The feed hole 1e1 on the barrel 1e pre-wets the reinforcing fibers.

Further, as shown in Figure 1, the mandrel 1b includes a main body section 1b1, a conical splitter section 1b2 connected to the front end of the main body section 1b1, and a fixed diameter section 1b3 connected to the rear end of the main body section 1b1, the outer diameter of the main body section 1b1 is smaller than the fixed diameter section. The outer diameter of the diameter section 1b3, the support cylinder 1e is sheathed on the outside of the main section 1b1 of the mandrel 1b and the tapered splitter section 1b2. The main body section 1b1 and the sizing section 1b3 are connected by an arc-shaped transition surface 1b4, and the rear end of the support cylinder 1e is adjacent to the arc-shaped transition surface 1b4. In order to realize the fixation of the mandrel 1b, a central hole 1b5 is opened on the conical splitter section 1b2 of the mandrel 1b, and the rear end of the splitter column 1f2 is plugged into the central hole 1b5, and the center hole 1b5 is pierced with a threaded screw with the splitter column 1f2. Connect and fix the mandrel 1b to the bolt 9 on the shunt column 1f2.

As shown in FIG. 1 and FIG. 4 , the outer tube 2 is also provided with a feed channel 31 for injecting molten material into the support cylinder 1e. Specifically, the outer tube 2 is pierced with a core tube 3 communicating with the extruder 4, the inner hole of the core tube 3 is the above-mentioned feed channel 31, the front end of the mandrel 1b is connected with a flow divider 1f, and the support tube 1e It is fixedly connected to the diverter 1f, and the outlet of the core tube 3 is directly opposite to the diverter 1f. The molten material extruded by the extruder 4 is conveyed into the molding die 1 through the core pipe 3 located in the outer pipe 2 , and such a conveying method will not affect the winding of the reinforcing fiber on the outer peripheral wall of the outer pipe 2 . The outlet of the core tube 3 is directly opposite to the flow divider 1f, so that the flow divider 1f can spread the molten material flowing out of the core tube 3 radially to the surroundings, which is convenient for heating and plasticizing the molten material, and improves the bonding effect of the reinforcing fiber and the molten material, thereby Increase the strength of the pipeline.

As shown in Figure 1, the outlet end of the core tube 3 is also fixedly provided with a connecting sleeve 6, the outer peripheral wall of the connecting sleeve 6 is against the inner peripheral wall of the outer tube 2, and the flow divider 1f is fixedly connected to the connecting sleeve through a fastener 7 6 on. Specifically, the connecting sleeve 6 is provided with eight holes 9 for bolts 9 along its circumference. As shown in FIG. A bolt 9 is perforated in each bolt 9 through hole, and the bolt 9 passes through the bolt 9 through hole and is threadedly connected with the corresponding bolt 9 hole 8 .

As shown in Figure 3, the flow divider 1f includes a cylindrical connection part 1f1 and a shunt column 1f2 arranged in the inner hole of the connection part 1f1. The 1f1s are connected by several connecting pieces 1f3 , the front end of the splitter column 1f2 has a splitter cone 1f4 , and the splitter cone 1f4 faces the outlet of the core tube 3 . As shown in Figure 1 and Figure 3, the outer peripheral wall of the connecting part 1f1 is provided with an annular stepped surface 1f5 along the circumferential direction, the front end of the support cylinder 1e is fixedly sleeved on the annular stepped surface 1f5, the outer peripheral wall of the supporting cylinder 1e and the connecting part 1f1 The peripheral walls are flush with each other. The molten material flowing out of the core tube 3 is first diffused in the radial direction by the splitter cone 1f4, and then is dispersed by the connecting piece 1f3 to further improve the plasticizing effect of the molten material, thereby improving Strengthen the bonding effect of fiber and molten material, so that the strength of the composite pipe is guaranteed.

In the process of producing the pipeline, it is necessary to use the tractor to pull the formed pipeline forward so that the pipeline can continuously protrude from the forming mold 1 to realize continuous production. Tractor is prior art, not shown in the figure. The forming equipment is equipped with an outer tube 2, and relies on existing fiber winding devices, such as a winding machine 5 and an axial yarn feeding structure, to wrap continuous reinforcing fibers on the outer peripheral wall of the outer tube 2 during manufacture. The axial yarn feeding structure covers the outer peripheral wall of the outer tube 2 with a number of continuous reinforcing fibers arranged axially along the outer tube 2 to form an axial fiber layer, and the winding machine 5 winds the continuous reinforcing fibers around the shaft in the circumferential direction. towards the outside of the fiber layer.

Since an annular cavity 1d through which reinforcing fibers pass is formed between the outer peripheral wall of the outer tube 2 and the inner peripheral wall of the outer mold casing 1a, the reinforcing fibers will continuously pass through the molding cavity of the molding die 1 under the action of the tractor Road 1c, and after reaching the rear end of the support cylinder 1e and detaching from the support cylinder 1e, it meets the molten material to form a composite state, and finally forms a fiber-reinforced composite pipe that protrudes from the rear end of the forming mold 1, and is connected to the traction after passing through the sizing cooling equipment machine.

Although this paper uses a lot of 1. Forming mold; 1a, outer mold sleeve; 1a1, front port; 1b, core mold; 1b1, main body section; 1b2, conical splitter section; Transition surface; 1b5, central hole; 1c, forming cavity; 1d, annular cavity; 1e, support cylinder; 1e1, feeding hole; 1f, splitter; 1f1, connecting part; ;1f4, splitter cone; 1f5, annular step surface; 2, outer tube; 3, core tube; 31, feed channel; 4, extruder; 5, winding machine; 6, connecting sleeve; 7, fastener ; 8, bolt holes; 9, bolts and other terms, but the possibility of using other terms is not excluded. These terms are used only to describe and explain the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the present invention.

Claims

A molding device for a continuous fiber-reinforced composite pipe, comprising a molding die (1), wherein a molding cavity (1c) is formed between an outer mold casing (1a) and a core mold (1b) of the molding die (1), and It is characterized in that the forming equipment also includes an outer tube (2), one end of the outer tube (2) extends into the outer mold cover (1a) from the front port (1a1) of the outer mold cover (1a), and the outer tube An annular cavity (1d) for fibers to pass is formed between the outer peripheral wall of (2) and the inner peripheral wall of the outer mold casing (1a). An external cylindrical support tube (1e), the support tube (1e) is provided with feeding holes (1e1) all over, the outer peripheral wall of the support tube (1e) and the inner peripheral wall of the outer mold casing (1a) There is a gap between them, and the outer tube (2) is also provided with a feed channel (31) for injecting molten material into the support cylinder (1e).
The continuous fiber reinforced composite pipe forming equipment according to claim 1, characterized in that there is a gap between the outer peripheral wall of the mandrel (1b) and the inner peripheral wall of the support cylinder (1e), and the support cylinder (1e ) and the outer mold casing (1a) are coaxially arranged, and the outer peripheral wall of the support cylinder (1e) is flush with the outer peripheral wall of the outer pipe (2).
The forming equipment of continuous fiber reinforced composite pipe according to claim 1, characterized in that, the forming equipment also includes an extruder (4), and the outer pipe (2) is penetrated with an extruder (4) connected core tube (3), the inner hole of the core tube (3) is the above-mentioned feed channel (31), the front end of the mandrel (1b) is connected with a flow divider (1f), and the support tube (1e) is fixedly connected to the flow divider (1f), and the outlet of the core pipe (3) is directly opposite to the flow divider (1f).
The forming equipment of continuous fiber reinforced composite pipe according to claim 3, characterized in that, the outlet end of the core pipe (3) is also fixedly provided with a connecting sleeve (6), and the outer circumference of the connecting sleeve (6) The wall abuts against the inner peripheral wall of the outer pipe (2), and the flow divider (1f) is fixedly connected to the connecting sleeve (6) through fasteners (7).
The forming equipment for continuous fiber reinforced composite pipe according to claim 3 or 4, characterized in that the flow divider (1f) comprises a cylindrical connection part (1f1) and an inner hole arranged in the connection part (1f1) The splitter column (1f2) in the splitter column (1f2) is coaxially arranged with the connecting part (1f1), and the splitter column (1f2) and the connecting part (1f1) are connected by several connecting pieces (1f3).
The forming equipment of continuous fiber reinforced composite pipe according to claim 5, characterized in that, the front end of the splitter column (1f2) has a splitter cone (1f4), and the splitter cone (1f4) is connected to the core pipe (3) Exit is right.
The continuous fiber reinforced composite pipe forming equipment according to claim 5, characterized in that, the outer peripheral wall of the connecting part (1f1) is provided with an annular stepped surface (1f5) along the circumference, and the front end of the support cylinder (1e) The fixed sleeve is arranged on the annular step surface (1f5), and the outer peripheral wall of the support cylinder (1e) is flush with the outer peripheral wall of the connecting part (1f1).
The forming equipment of continuous fiber reinforced composite pipe according to claim 5, characterized in that, the mandrel (1b) comprises a main body section (1b1), a conical splitter section (1b2) connected to the front end of the main body section (1b1) And the sizing section (1b3) connected to the rear end of the main body section (1b1), the outer diameter of the main body section (1b1) is smaller than the outer diameter of the sizing section (1b3), and the support cylinder (1e) is sleeved on the mandrel (1b) of the body section (1b1) and the outside of the conical splitter section (1b2).
The forming equipment for continuous fiber reinforced composite pipe according to claim 8, characterized in that, the main body section (1b1) and the sizing section (1b3) are connected by an arc-shaped transition surface (1b4), and the support cylinder The rear end of (1e) is adjacent to the arc transition surface (1b4).
The forming equipment of continuous fiber reinforced composite pipe according to claim 8, characterized in that, a central hole (1b5) is opened on the conical splitter section (1b2) of the mandrel (1b), and the splitter column (1f2 ) is plugged into the center hole (1b5), and the center hole (1b5) is pierced with a screw connection with the splitter column (1f2) and the mandrel (1b) is fixedly connected to the splitter column (1f2). Bolt (9).