CN114193730A

CN114193730A - Production equipment for reinforced and toughened composite pipe

Info

Publication number: CN114193730A
Application number: CN202111507976.4A
Authority: CN
Inventors: 汪鹏跃; 黄剑; 孙华丽; 白元清; 付强; 贺晓莉
Original assignee: Yonggao Co Ltd
Current assignee: Yonggao Co Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-03-18
Anticipated expiration: 2041-12-10
Also published as: CN114193730B; WO2023103105A1

Abstract

The invention provides production equipment for a reinforced and toughened composite pipe, and belongs to the technical field of composite pipes. It has solved the weak problem of compound pipeline intensity among the prior art. This production facility of reinforcing and toughening composite pipe includes the extruder, forming die, the core pipe that communicates with the extruder, the cover is established at the outside outer tube of core pipe and can be with the coiling machine of reinforcing fiber cladding on the outer tube periphery wall, be formed with the shaping chamber way between forming die's mandrel and the outer die sleeve, the exit end of core pipe stretches into in the forming die and says the intercommunication with forming die's shaping chamber, the one end and the forming die of outer tube are connected and the reinforcing fiber layer on the outer tube periphery wall can pass the shaping chamber way. The composite pipeline produced by the production equipment has the advantages of high strength and good toughness.

Description

Production equipment for reinforced and toughened composite pipe

Technical Field

The invention belongs to the technical field of composite pipelines, and relates to production equipment for a reinforced and toughened composite pipe.

Background

With the continuous expansion of cities and the continuous exploitation of petroleum and natural gas, the demand on transportation pipelines is also increasing. Traditional steel pipelines are poor in corrosion resistance and difficult to carry, and cannot meet the current requirements. Meanwhile, most of the main petroleum and natural gas in China are distributed in deserts, swamps or mountainous areas, the natural environment is severe, the steel pipelines are seriously influenced by the natural environment when being laid, and the conveying pipelines are extremely easy to damage due to ground settlement, mountain landslides and the like. The fiber reinforced composite pipeline has small density, high strength and excellent mechanical properties, such as good processing performance, good chemical stability resistance, heat resistance and the like, and can still be stably used for a long time in some complex environments, so the fiber reinforced composite pipeline is widely applied.

The existing fiber reinforced composite pipe generally comprises an inner layer, a reinforcing layer and an outer layer of three-layer structure from inside to outside in sequence, wherein the inner layer is a pipe blank extruded by a plastic extruder, the reinforcing layer is reinforcing fibers wound on the inner layer in a winding mode so as to achieve the purpose of improving the structural strength of the plastic pipeline, and the outer layer is a plastic layer attached outside the reinforcing layer. The existing equipment for manufacturing the reinforced fiber composite pipeline has different structures, but the manufacturing principle is basically consistent, and the reinforced fiber composite pipeline is mainly formed by firstly extruding a pipe blank through an extruder, then winding reinforced fibers on the surface of the pipe blank through a winding machine and bonding the reinforced fibers through a bonding agent. For example, in a plastic pipe molding line (application No. 201811640324.6; application publication No. CN 109664479A) disclosed in chinese patent document, the outflow line passes through a plasticized material in a first extruder, enters a molding die, molds the plasticized material into an inner pipe, moves through a first molding machine to mold and cool the inner pipe, and then sequentially passes through a tape laying machine and a winding machine, the tape laying machine axially attaches a first reinforcing tape to the surface of the inner pipe, and the winding machine spirally winds a second reinforcing tape to the surface of the inner pipe. And then, the inner pipe moves through the composite die, a second extruder coats the plasticized raw materials on the inner pipe and forms the composite pipe, and finally the composite pipe moves through a second forming machine and is formed and cooled. The composite pipeline produced by the equipment needs to ensure that the prepared pipeline reaches the required strength, multiple layers of winding is usually needed, the thickness of continuous fibers is very small, the bonding layer formed by directly winding the continuous fibers on the surface of the inner pipe is very small, and meanwhile, the bonding force of the contact area between the fibers is limited or not bonded at all due to the fact that the fibers are sequentially wound, so that the bonding between the layers is not firm, and the effect of improving the quality, particularly the strength, of the composite pipeline is limited.

Disclosure of Invention

The invention aims to provide production equipment for a reinforced and toughened composite pipe aiming at the problems in the prior art, and the technical problem to be solved by the invention is how to enable the produced composite pipe to have higher strength performance.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a production facility of compound pipe is toughened in reinforcing, includes extruder and forming die, be formed with the shaping chamber way between forming die's mandrel and the outer die sleeve, its characterized in that, this production facility still include with the core pipe of extruder intercommunication, cover establish at the outside outer tube of core pipe and can be with the coiling machine of reinforcing fiber cladding on the outer tube periphery wall, the exit end of core pipe stretches into in the forming die and says the intercommunication with forming die's shaping chamber, the one end of outer tube is connected with forming die and the reinforcing fiber layer on the outer tube periphery wall can pass the shaping chamber way.

In the production equipment, a forming cavity channel is formed between a core mould and an outer mould sleeve of the forming mould, and the forming cavity channel has the function of enabling the pipeline to extend out of the forming mould in a required section shape. The core pipe is communicated with the extruder, so that the molten material extruded by the extruder can enter the core pipe, and the molten material flowing out of the core pipe finally enters a forming cavity of the forming die. Through the outside cover at the core pipe establish the outer tube, make fibre cladding mechanism directly with the reinforcing fibre cladding on the periphery wall of outer tube, and because the one end of outer tube is connected with forming die and the reinforcing fibre layer on the outer tube periphery wall can pass the shaping chamber way, the melting material that the core pipe flowed out just can combine with reinforcing fibre in the shaping chamber way like this, later form fibre reinforcing composite pipe and say from the exit end of shaping chamber and stretch out, then carry to the vacuum and stereotype the incasement and stereotype and cool off.

Obviously, the production principle of this compound pipe's production facility is completely different with current equipment, and this production facility is not through extruding out the pipe billet through the extruder earlier, then through the coiler with reinforcing fiber winding on the pipe billet surface, but with melting material and continuous reinforcing fiber one step of shaping into compound pipeline in forming die, the melting material can be compatible, the infiltration with reinforcing fiber in forming die like this, consequently the bonding effect is better, and intensity is higher, and does not have the problem that the interlayer bonding that the compound pipeline that current equipment produced exists and does not bond insecurely and cause the weakening of pipeline intensity.

In the production equipment of the reinforced and toughened composite pipe, one end of the outer pipe extends into the outer die sleeve and is coaxially arranged with the outer die sleeve, and an annular cavity channel opposite to the forming cavity channel is formed between the outer peripheral wall of the outer pipe and the inner peripheral wall of the outer die sleeve. Through such design for in the reinforcing fiber ability on the outer tube periphery wall more smooth and easy entering forming die, avoid reinforcing fiber to get into forming die's in-process to reinforcing fiber winding angle, the influence of winding tensile force, and then promote the quality and the intensity of compound pipeline product.

In the production equipment of the reinforced and toughened composite pipe, the outer mold sleeve is also internally provided with a flow divider, the flow divider is connected to the front end of the core mold, and the outlet end of the core pipe is opposite to the flow divider. The prior art in the field of molds is to provide a flow divider in a mold. The outlet end of the core pipe is opposite to the flow divider, so that the flow divider can radially diffuse the molten material flowing out of the core pipe to the periphery, further heating and plasticizing are facilitated, the combination effect of the reinforced fibers and the molten material is improved, and the strength of the pipeline is further improved.

In foretell reinforcing and toughening composite tube's production facility, the fixed cover that is equipped with of exit end of core pipe still is equipped with the adapter sleeve, the periphery wall of adapter sleeve supports and leans on the internal perisporium of outer tube, the shunt links firmly through the fastener on the adapter sleeve. Through such design, guaranteed the stability of core tube exit end on the one hand, on the other hand has realized the installation of shunt for the clearance that supplies reinforcing fiber to pass is formed to the internal perisporium of periphery wall and the outer die sleeve of shunt. Preferably, the fastener is a bolt, eight bolt through holes are formed in the connecting sleeve along the circumferential direction of the connecting sleeve, eight bolt holes which are in one-to-one correspondence with the bolt through holes are formed in the shunt, a bolt penetrates through each bolt through hole and is in threaded connection with the corresponding bolt hole.

In the production equipment of the reinforced and toughened composite pipe, the production equipment further comprises a die support for supporting and fixing the outer die sleeve, the die support can move back and forth along the axial direction of the outer pipe, and the core die can be separated from the outer die sleeve after moving towards the direction far away from the outer pipe through the die support. The core mold, the flow divider, the inner pipe and the outer pipe are fixedly connected together. In preparation before production, continuous reinforcing fibers need to penetrate through a forming die to be connected to a tractor, so that the outer die sleeve is supported and fixed through a movable die support, the outer die sleeve can be driven to move together by the movement of the die support, demolding is realized, namely, the core die is separated from the outer die sleeve, the continuous reinforcing fibers can conveniently penetrate through the inner part of the outer die sleeve and be connected to the tractor, after the reinforcing fibers are connected, the outer die sleeve is reset and locked, and then production work is started. The mode realizes the penetrating arrangement of the continuous reinforced fibers in the forming die, so that the manufacturing process is very convenient.

In the production equipment of the reinforced and toughened composite pipe, the production equipment further comprises an outer pipe support frame, and the other end of the outer pipe and the inlet end of the core pipe are both connected to the outer pipe support frame.

In the production equipment of the reinforced and toughened composite pipe, the production equipment further comprises a roller support positioned on the side part of the mold support, wherein the roller support is provided with a roller positioned below the outer pipe, and the roller can roll and support the reinforced fibers on the outer peripheral wall of the outer pipe. The outer peripheral wall of the outer pipe and the outer die sleeve need to form an annular cavity for the reinforcing fibers to pass through, so that the concentricity between the outer pipe and the outer die sleeve needs to be ensured. The core tube and the outer die sleeve are concentric, so that the outlet end of the core tube is opposite to the flow divider and eccentricity is avoided. Therefore, the installation stability of the outer tube and the core tube and the concentricity of the outer tube, the core tube and the outer die sleeve directly influence the quality of the product. Through setting up outer tube support frame and gyro wheel for the both ends of outer tube have all received the support, have guaranteed the stability of outer tube installation, and then also can guarantee that the intraductal core pipe of outer tube has higher stability, have avoided the reduction of concentricity between outer tube, core pipe and the outer die sleeve that stability reduction brought, and then have guaranteed the quality of product. In the process that the reinforced fibers move relative to the outer pipe, the rollers roll and support the reinforced fibers, so that the mode not only plays a role in supporting, but also avoids hard friction on the reinforced fibers, protects the reinforced fibers and enables the quality of produced pipeline products to be stable.

In the production equipment of the reinforced and toughened composite pipe, the outer wall of the outer die sleeve is further sleeved with a plurality of annular heating rings, and the heating rings are sequentially arranged along the axial direction of the outer die sleeve. The design makes the heating more even, promotes the combination effect of reinforcing fiber and melting material, and then promotes the intensity of pipeline.

In the production equipment of the reinforced and toughened composite pipe, the number of the winding machines is two, and the two winding machines are sequentially arranged along the axial direction of the outer pipe. The winding machine is a conventional one, and is used for winding reinforcing fibers along the circumferential direction of the outer tube. Through setting up two coiling machines, two coiling machines can be with the winding of different wire winding angles with reinforcing fiber winding in axial reinforcing fiber's periphery, make fibrous winding thickness in circumference increase, increased the annular rigidity of compound pipe, and then promote the intensity of compound pipe.

In the production equipment of the reinforced and toughened composite pipe, the extruder is connected with a discharge pipe communicated with an extrusion opening of the extruder, and an outlet end of the discharge pipe is connected to the outer pipe support frame and communicated with an inlet of the core pipe.

Compared with the prior art, the production equipment for the reinforced and toughened composite pipe has the following advantages:

1. this production facility of composite pipe is through one step of shaping compound pipeline with melting material and continuous reinforcing fiber in forming die, and the melting material can be compatible, the infiltration with reinforcing fiber in forming die like this, consequently combines the effect better, and intensity is higher, and does not have the problem that the interlayer bonding that the compound pipeline that current equipment produced exists causes the weak of pipeline intensity.

2. The production equipment of the composite pipe also has the advantages of high production efficiency and short production line arrangement length, so that the occupation of the factory space can be reduced.

Drawings

Fig. 1 is a schematic perspective view of the present composite pipe production apparatus.

Fig. 2 is a sectional view of the present composite pipe production apparatus.

Fig. 3 is a partially enlarged view of fig. 2.

Fig. 4 is a front view of the present composite pipe production apparatus.

In the figure, 1, an extruder; 2. forming a mold; 21. a core mold; 22. an outer die sleeve; 23. forming a cavity; 24. a flow divider; 25. heating a ring; 3. a core tube; 4. an outer tube; 5. an annular channel; 6. an outer tube support frame; 7. a discharge pipe; 8. a winding machine; 9. connecting sleeves; 10. a fastener; 11. a mold holder; 12. a roller bracket; 13. a roller; 14. a vacuum shaping box; 15. a tractor; 16. pipe cutting machine.

Detailed Description

The following is a specific embodiment of the present invention and is further described with reference to the accompanying drawings, but the present invention is not limited to this embodiment.

As shown in fig. 1 and 2, the production equipment for the reinforced and toughened composite pipe comprises an extruder 1, an outer pipe support frame 6, two winding machines 8, a forming die 2, a vacuum shaping box 14, a tractor 15 and a pipe cutting machine 16 which are sequentially arranged. An outer tube 4 is connected between the forming die 2 and the outer tube support frame 6, and a core tube 3 coaxially penetrates through the outer tube 4. The end of the outer tube 4 far away from the forming die 2 and the inlet end of the core tube 3 are both connected to an outer tube support frame 6. The extruder 1 is connected with a discharge pipe 7 communicated with an extrusion opening of the extruder, the outlet end of the discharge pipe 7 is connected with an outer pipe support frame 6 and is communicated with the inlet of the core pipe 3, at the moment, the core pipe 3 is communicated with the extruder 1, so that molten materials extruded by the extruder 1 can enter the core pipe 3, and the molten materials flowing out of the core pipe 3 finally enter a forming cavity channel 23 of the forming die 2.

As shown in fig. 3, the forming die 2 includes an outer die case 22, a core die 21, and a flow divider 24, wherein a plurality of annular heating rings 26 are further sleeved on an outer wall of the outer die case 22, and the heating rings 26 are sequentially arranged along an axial direction of the outer die case 22. The outlet end of the core tube 3 is also fixedly sleeved with a connecting sleeve 9, the outer peripheral wall of the connecting sleeve 9 abuts against the inner peripheral wall of the outer tube 4, and the shunt 24 is fixedly connected to the connecting sleeve 9 through a fastener 10. The flow divider 24 is connected to the front end of the core mold 21, and a molding cavity 23 is formed between the core mold 21 and the outer mold shell 22, and the molding cavity 23 functions to extend the pipe out of the molding die 2 in a desired sectional shape. The outlet end of the core tube 3 extends into the forming die 2 and is communicated with the forming cavity 23 of the forming die 2, and the outlet end of the core tube 3 is opposite to the flow divider 24. One end of the outer tube 4 also extends into the outer die sleeve 22 and is coaxially arranged with the outer die sleeve 22, an annular cavity channel 5 for the reinforced fibers to pass through is formed between the outer peripheral wall of the outer tube 4 and the inner peripheral wall of the outer die sleeve 22, and the forming cavity channel 23 of the annular cavity channel 5 is right opposite, so that the reinforced fiber layer on the outer peripheral wall of the outer tube 4 can pass through the forming cavity channel 23.

As shown in fig. 1 and 2, the production apparatus further includes a die holder 11 for holding the outer shell 22 and a roller holder 12 provided at a side of the die holder 11, and the die holder 11 can be moved back and forth in the axial direction of the outer tube 4, and the core mold 21 can be released from the outer shell 22 by moving the die holder 11 in a direction away from the outer tube 4. The roller bracket 12 is provided with a roller 13 positioned below the outer tube 4, and the roller 13 can roll and support the reinforcing fibers on the outer peripheral wall of the outer tube 4. The roller carriage 12 and the roller 13 are not illustrated in fig. 1.

As shown in fig. 1 and 2, two winding machines 8 are sequentially provided in the axial direction of the outer tube 4. The winding machine 8 is of the prior art and can be purchased directly on the market. Of course, in the actual manufacturing process, an axial yarn feeding structure in the prior art may be further provided, the axial yarn feeding structure is utilized to coat a plurality of continuous reinforcing fibers axially arranged along the outer tube 4 on the outer circumferential wall of the outer tube 4 and form an axial fiber layer, and the winding machine 8 winds the continuous reinforcing fibers around the outer portion of the axial fiber layer along the circumferential direction.

When the production equipment of the reinforced and toughened composite pipe is manufactured, an extruder 1 extrudes molten material such as PE, and the molten material enters a core pipe 3 and flows into a forming die 2. Meanwhile, under the action of a tractor, the reinforcing fibers coated on the outer peripheral wall of the outer tube 4 continuously enter the forming die 2, are combined with the molten material flowing out of the core tube 3 in the forming cavity 23 to form a fiber reinforced composite pipeline, the fiber reinforced composite pipeline extends from the outlet end of the forming cavity 23, then the fiber reinforced composite pipeline sequentially passes through sizing of a sizing sleeve, sizing and cooling of the vacuum sizing box 14 and traction of the tractor 15, and the composite tube discharged from the tractor 15 can be cut into a pipeline with a required length through the tube cutting machine 16.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although 1, an extruder is used more herein; 2. forming a mold; 21. a core mold; 22. an outer die sleeve; 23. forming a cavity; 24. a flow divider; 25. heating a ring; 3. a core tube; 4. an outer tube; 5. an annular channel; 6. an outer tube support frame; 7. a discharge pipe; 8. a winding machine; 9. connecting sleeves; 10. a fastener; 11. a mold holder; 12. a roller bracket; 13. a roller; 14. a vacuum shaping box; 15. a tractor; 16. pipe cutter, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a production facility of compound pipe is toughened in reinforcing, includes extruder (1) and forming die (2), be formed with shaping chamber way (23) between mandrel (21) and the outer die sleeve (22) of forming die (2), its characterized in that, this production facility still include with core pipe (3) of extruder (1) intercommunication, cover establish outer tube (4) outside core pipe (3) and can with reinforcing fiber cladding coiling machine (8) on outer tube (4) periphery wall, the exit end of core pipe (3) stretch into forming die (2) in and with forming die's (2) shaping chamber way (23) intercommunication, the one end and the forming die (2) of outer tube (4) are connected and the reinforcing fiber layer on outer tube (4) periphery wall can pass shaping chamber way (23).

2. The production equipment of the reinforced and toughened composite pipe as claimed in claim 1, wherein one end of the outer pipe (4) extends into the outer die sleeve (22) and is coaxially arranged with the outer die sleeve (22), and an annular cavity channel (5) facing the forming cavity channel (23) is formed between the outer peripheral wall of the outer pipe (4) and the inner peripheral wall of the outer die sleeve (22).

3. The production equipment of the reinforced and toughened composite pipe as claimed in claim 1, wherein a flow divider (24) is further arranged in the outer die sleeve (22), the flow divider (24) is connected to the front end of the core die (21), and the outlet end of the core tube (3) is opposite to the flow divider (24).

4. The production equipment of the reinforced and toughened composite pipe as claimed in claim 3, wherein the outlet end of the core pipe (3) is further fixedly sleeved with a connecting sleeve (9), the outer peripheral wall of the connecting sleeve (9) abuts against the inner peripheral wall of the outer pipe (4), and the flow divider (24) is fixedly connected to the connecting sleeve (9) through a fastener (10).

5. The production equipment of the reinforced and toughened composite pipe as claimed in claim 1, 2 or 3, wherein the production equipment further comprises a die holder (11) for supporting and fixing the outer die sleeve (22), the die holder (11) can move back and forth along the axial direction of the outer pipe (4), and the core die (21) can be ejected out of the outer die sleeve (22) after the die holder (11) moves towards the direction away from the outer pipe (4).

6. The production equipment of the reinforced and toughened composite pipe as claimed in claim 1, 2 or 3, further comprising an outer pipe support frame (6), wherein the other end of the outer pipe (4) and the inlet end of the core pipe (3) are both connected to the outer pipe support frame (6).

7. The production equipment of the reinforced and toughened composite pipe as claimed in claim 5, further comprising a roller bracket (12) located at the side of the mold bracket (11), wherein a roller (13) located below the outer pipe (4) is arranged on the roller bracket (12), and the roller (13) can roll and support the reinforcing fibers on the outer peripheral wall of the outer pipe (4).

8. The production equipment of the reinforced and toughened composite pipe as claimed in claim 1, 2 or 3, wherein the number of the winding machines (8) is two, and the two winding machines (8) are sequentially arranged along the axial direction of the outer pipe (4).

9. The production equipment of the reinforced and toughened composite pipe as claimed in claim 6, wherein a discharge pipe (7) communicated with an extrusion opening of the extruder (1) is connected to the extruder, and an outlet end of the discharge pipe (7) is connected to the outer pipe support frame (6) and communicated with an inlet end of the core pipe (3).

10. The production equipment of the reinforced and toughened composite pipe as claimed in claim 1, 2 or 3, wherein a plurality of annular heating rings (26) are further sleeved on the outer wall of the outer die sleeve (22), and the heating rings (26) are sequentially arranged along the axial direction of the outer die sleeve (22).