Device for continuous manufacturing of pipes from composite fibrous material

FIELD: technological processes.

SUBSTANCE: invention may be used in production of pipes from reinforced plastics and other products. Device for continuous making of pipes from composite fiber material in the form of self-feeding holder, comprises block of sectors that forms internal surface of pipes and consists of several pairs of diametrically opposite sectors and supports installed in internal cavity of block and rigidly joined with each sector from pair, besides, each pair of sectors may execute reciprocal motion in axial direction by value of axial travel of sectors by means of driving mechanisms independently on other pairs. Number of coupled surfaces in supports is equal to number of sectors. In specified device coupled surfaces of supports and sectors in cross section are arranged in the form of circumferential arcs that have common centre on circumference with diametre that is more than diametre of transverse contour of support. Rigid connection of each support with pair of sectors is done with the help of single connection part, for instance, by means of bolt or pin. Distance along axis between two neighbouring supports is selected as more than sum of support thickness and axial travel of sectors by value of guaranteed axial gap between supports. Geometric parametres of coupled surfaces of support are arranged so that to provide for required tangential gap between two neighbouring sectors, for instance, within the limits of 0.3-0.6 mm after mechanical processing of external surface of sector block. Openings in sectors for connection elements are closed with plugs having external surface that matches external surface of sector block.

EFFECT: provision of significant increase of sector block rigidity and improvement of structure manufacturability.

4 cl, 5 dwg

 

The invention relates to the field of engineering, mainly chemical, and can be used, for example, in the production of pipes made of reinforced plastics and other products.

A device for the continuous manufacture of GRP pipes, described in the book "the Manufacture of GRP pipes" authors Gaanderen and other publishers Kharkiv order of the red banner of labor state University named after M. Gorky, Kharkov, 1964, SCR, which ensures the formation of a hollow cylinder on a rigid cylindrical body consisting of individual elements moving along the body with a constant and equal speed, with each element in turn makes the cycle consisting of the labor movement forward and quickly return to its original position. The device includes a Cam (copier)in contact with the elements (sectors)that are located in the slots of the housing. Sector in contact with a rigid cylindrical body through bearings or sliding. Describes the structural elements of the device form the mandrel, the outer surface of which is the formation of a hollow cylinder.

The disadvantages of this device is the design complexity, the presence of a plurality of friction elements, the wear of these elements during operation and insufficient jesd the industry sectors, distorting the shape of the outer surface of the mandrel.

A device for continuous production of pipes according to the patent of Russian Federation №2309043 published 2007.10.27. The device consists of a frame containing the shaft and sector members. Distinctive features of this frame is that spatially separated pie strips bonded into three blocks, the first of which was still fastened to the shaft, and the second and third are between the sector straps first with the possibility of reciprocating movement and connected with the individual tappets included inside the shaft. Combining several sectors in several separate blocks simplifies the design of the mandrel. However, the functional reliability of this design raises considerable doubt. To the tube is wound on the mandrel, the effort of friction from three blocks of sectors with different focus. At that moment, when one of moving in the axial direction of the block of sectors makes a return (reverse flow) movement, the pipe must inevitably stop axial movement, since the friction force of this block and block, fixed in the axial direction, will counter the force from the block, performing an axial movement in the direction of flow.

The closest in design to the claimed device is a device for nepreryvnogo the manufacture of pipes of reinforced plastics in patent No. 2116888 (publ. 1998.08.10), selected as a prototype. It includes mounted on the frame cantilever rotating the mandrel, the packer reinforcing material, site submission binder, curing chamber and additional support, and the mandrel is designed as a continuation of the drive shaft and contains a block of sectors connected to the drive shaft can be changed, while the cantilever portion of the block of sectors forming an internal cavity in which is placed a reference internal elements, and supporting internal elements are made either of alternating balls and polyhedra, the number of faces being equal to the number of sectors per block, any of polyhedra, while the total length of the internal reference element along the axis of the cantilever portion of the block of sectors is 10-30% of the length of the cantilever portion of the block of sectors, diametrically opposite sector rigidly connected.

The main disadvantage of the prototype is that the pair of sectors is based on the planes of the polyhedron. In the case of fastening of a support with a pair of sectors using a single bolt or pin this bearing has the ability to rotate about the axis of the fasteners. Therefore, the reference element to the sectors you want to seal by means of two brackets spaced at some distance along the axis of the device. This circumstance of obukov which provides a greater thickness of the supports and end views of a greater axial distance between two adjacent supports, fastened with a single sector. During the manufacture of pipe from the efforts of the tension reinforcing fibers sector mandrel SAG between the supports connected rigidly with the sectors, and the initial gap with surfaces other support is selected by distorting the shape of the outer surface of the mandrel. By the formation of a local reverse konusnosti on the mandrel, it has increased resistance to the reciprocating motion, which leads to additional energy drives the mandrel, the appearance of internal stresses in the composite material of the pipe, and also to the deterioration of structural elements of the frame.

The number of support elements in the known device is determined based on the ratio of their total length, component range from 10 to 30% of the length of the cantilever portion of the block of sectors. This ratio is not associated with a specific geometric parameter of the device, the thickness of the bearings and the axial clearance between the support elements during the reciprocating movement of the sectors. The absence of such a connection results in an increased distance between two adjacent supports rigidly connected with a pair of sectors, which leads to reduced stiffness sector bending and all the negative consequences listed above.

The known device has insufficient technology is lichnosti. Sector require careful adjustment between a width to the machining of the Assembly, leading to increased complexity of manufacturing. The supporting elements are in contact with sectors on the flat faces, the accuracy of the position are to provide harder than precision cylindrical surfaces. In addition, the presence of a plurality of fastening elements supporting elements with sectors leads to additional labor costs of manufacturing and Assembly.

The invention solves the problem of increasing the rigidity of the device, leading to a stable outer configuration of the mandrel, a decrease in the energy to drive the reciprocating motion of sectors, improving the wear resistance of the device, to improve the quality of the manufactured pipes. The device also solves the problem of reducing the complexity of manufacture and cost.

To achieve the technical result used the device for continuous production of pipes made of composite fibrous material in the form samapada mandrel containing a block of sectors forming the inner surface of the pipe, and consists of multiple pairs of diametrically opposed sectors, mating with supports placed in the inner cavity of the block, and the number of mating surfaces in the bearings is equal to the number of sectors, and each bearing is rigidly tie is on only one pair of sectors so to a couple of sectors was capable of reciprocating motion in the axial direction to the axial stroke of the sectors by means of a drive mechanism independently of the other pairs.

Distinctive features of the specified device as compared with the device of the prototype is that the mating surfaces of the bearings and sectors in cross-section made in the form of arcs of circles having a common center on a circle with a diameter larger than the diameter of the transverse contour of the supports, a rigid bond to each support with a pair of sectors is done using one of the fasteners, such as screws or pins, and the distance along the axis between two adjacent supports is greater than the sum of the thickness of the bearing and the axial stroke of the sectors on the value of the guaranteed axial clearance between the plates.

The accuracy of the position of the cylindrical supporting surfaces to perform a more just, than the position accuracy of flat surfaces, resulting in a minimal and stable clearance in the radial direction between the supports and sectors that are not related strictly to these supports (within 0.1-0.2 mm). Due to selection of the geometric parameters of the mating surfaces of the supports and sectors it is possible to maintain a small gap ΔTin the tangential direction between two adjacent sectors after mechanical about what abode block of sectors on the outer surface, without adjustment of the sectors according to their width. The recommended value of this gap to the diameter of the mandrel 50 to 150 mm is 0.3-0.6 mm

The holes in the sectors for connecting elements are closed tubes having an outer surface that is coincident with the outer surface of the block of sectors.

Due to the presence of these signs created the device, which significantly increased the rigidity of the block of sectors and improved manufacturability of the design.

The proposed design of the device illustrated by the drawings shown in figures 1-4.

Figure 1 shows a longitudinal section of the device.

Figure 2 shows cross section a-a of the device.

Figure 3 shows the mechanism to provide the desired circumferential gap between the sectors.

Figure 4 shows the fastening of a support to the sector.

Figure 1 shows a longitudinal section of the inventive device. In the inner cavity of the block of sectors formed cavity in which is placed a support sectors. Shown in the cross section of a support 7, 8, 9 and 10. They are placed sequentially along the axis of the mandrel. Shown in the cross section are also diametrically opposite sectors 1 and 4. They are firmly attached to the supports 7 and 10 and freely to contact with the supports 8 and 9. The axial distance L between adjacent supports is:

L=h+H+ΔOC,

where H is the thickness of the support in the axial direction of the unit sectors;

h - stroke sector is in (step copier);

ΔOC- the value of the guaranteed axial clearance.

The amount guaranteed, the axial clearance between the supports is usually equal to 2...5 mm

Fastening of a support to the sector is one screw or pin, thereby decreasing values of N and L and, consequently, the axial distance between two adjacent supports, fastened with a single sector.

Figure 2 shows a cross section of the device. In the present embodiment, it consists of a block of six sectors. These sectors form the inner surface of the pipe and have the opportunity to make a reciprocating motion in the axial direction to the axial stroke of the sectors. Diametrically opposite sections of the block are arranged in pairs. In the specific example of execution there are three pairs of sectors: 1 and 4, 2 and 5 and 3 and 6. Contact between the surfaces of the bearings and sectors are areas of cylindrical surfaces, the axes of these surfaces are located on one common for all cylindrical surface having a diameter larger than the diameter of the transverse contour of support.

Figure 3 illustrates the possibility of providing the desired and stable tangential gap ΔTbetween two adjacent sectors without fits sectors in width. To this end, the radius of the circle RCwhere there are centres of Sprague what's circles close to the radius of the mandrel, and the radius of the mating surfaces r is chosen so that after machining the assembled cylindrical billets of two adjacent sectors in a block of sectors having an outer diameter D that is automatically ensured the necessary magnitude of the tangential gap ΔT. The mating surfaces of the bearings and sectors in cross-section made in the form of arcs of circles having a common center on a circle with a diameter larger than the diameter of the transverse contour of the support. In particular, in the specific example of the execution of RC=D/2 and radius r is equal to (approximate):

r≈πRC/6-ΔT

The amount of the guaranteed tangential gap ΔTbetween adjacent sectors for pots with a diameter of from 50 to 150 mm 0.3...0.6 mm

In the mating bearing 10 with sectors 2 and 6, as well as shown in figure 3 sectors 3 and 5 by contacting cylindrical surfaces provide a small radial clearance ΔPthe components usually 0,1...0,2 mm

Figure 4 shows a variant of the mounting support 10 to diametrically opposite sectors 1 and 4 by means of screws 13 and 14. On the outside of the holes in the sectors provided the tubes 11 and 12. The weld bead 15 on the contour of the tube provides its rigid connection with the sector. A possible option is to fill the cavity from the outside of the fastening elements of the solid is the missing part - resin or a light alloy. After welding or casting produces mechanical processing of tubes flush with the outer surface of the sectors.

1. Device for the continuous production of pipes made of composite fibrous material in the form samapada mandrel containing a block of sectors forming the inner surface of the pipe, and consists of multiple pairs of diametrically opposed sectors, mating with supports placed in the inner cavity of the block, and the number of mating surfaces in the bearings is equal to the number of sectors, and each bearing is rigidly connected with only one pair of sectors so that the pair of sectors was capable of reciprocating motion in the axial direction to the axial stroke of the sectors by means of a drive mechanism independently of the other pairs, characterized in that the mating surfaces of the bearings and sectors in cross-section made in the form of arcs of circles having a common center on a circle with a diameter larger than the diameter of the transverse contour of the support, the distance along the axis between two adjacent supports is greater than the sum of the thickness of the bearing and the axial stroke of the sectors on the value of the guaranteed axial clearance between the supports.

2. The device according to claim 1, characterized in that the geometrical parameters of the mating surfaces of the supports are made thus, mo is able to provide the desired tangential gap between two adjacent sectors, for example, in the range of 0.3-0.6 mm after machining the outer surface of the block of sectors.

3. The device according to claim 1, characterized in that the holes in the sectors for connecting elements are closed tubes having an outer surface that is coincident with the outer surface of the block of sectors.

4. The device according to claim 1, characterized in that the rigid bond to each support with a pair of sectors is done using one of the fasteners, such as screws or pins.



 

Same patents:

FIELD: technological processes.

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FIELD: technological processes.

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FIELD: mechanics.

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16 cl, 2 dwg

FIELD: technological processes; mechanical engineering.

SUBSTANCE: invention may be used in production of body or reservoir-adapters of aircrafts used in rocket and aviation engineering. Mandrel for winding of conic shells from polymer composite materials comprises two-place body with shape-generating surfaces and separating belt, and mechanism for shells removal. Separating belt is equipped with windows that are evenly distributed on the whole of its surface and insulating layer that covers windows, openings of which contain mechanism drives - pressing screws installed with recess relative to links between windows. Pressing screws with their pressing element are installed face to face to movable detachable ring, which is installed, in its turn, face to face to step of separating belt with projection above external surface of links with the provision for sliding on shape-generating surface in area of produced shell rib shaping. At that shape-generating surface of mentioned area is provided with annular groove filled with easily breakable composition of the basis of gypsum that separates area of rib shaping into area of working rib and area of technological rib. Method of mandrel for winding of conic shells from polymer composite materials includes operations used to assemble the mandrel. Mandrel comprises two-place body with shape-generating surfaces and separating belt, mechanism for removal of shells and fibers from high-strength material impregnated with synthetic binder. Spiral turns of shells and annular turns of ribs are wound on mandrel, thus providing required tension of fibers. Prior to winding, removable ring is installed on shape-generating surface of rib face to face to step of separating belt with projection above external surface of separating belt. Then insulating layer is laid with overlapping of separating belt windows, where pressing screws of removal mechanism are installed below the level of separating belt external surface face to face to removable ring. On completion of primary winding, pressing annular turns are wound on separating belt to increase tension of spiral turns. After thermal treatment shell is mechanically processed, removing material from separating belt and cutting rib into working and technological ribs. At that shell is pushed off the mandrel with the help of pressing screws that affect the technological rib via removable ring.

EFFECT: higher reliability of mandrel operation due to exclusion of possibility for synthetic binder ingress into mechanism and prevention of its damage, prevention of shape-generating surfaces damage by cutting tools in process of shells mechanical treatment due to higher quality of shells at more even tension of spiral fibers in process of winding, higher manufacturability of mandrel application.

4 cl, 6 dwg

FIELD: technological processes.

SUBSTANCE: method includes formation of packet by means of continuous layerwise laying of reinforcing fiber material impregnated with binder, with alternation of transverse and longitudinal layers. Packet is passed through shaping draw plate. Prior to formation of packet internal film and the first transverse layer are laid onto continuously moving mandrels. Every longitudinal layer is laid by means of plate with drawdown openings. Openings are provided with provision of facets formation on product depending on configuration of its cross section, when packet is passed through shaping draw plate. Prepressing force is applied to packet. Product material is polymerised in single stage after laying of upper layer. Installation comprises spreading plate with drawdown openings arranged to provide formation of facets in product.

EFFECT: expansion of operational resources, wider range of product application areas due to realisation of conditions on provision of polythickness minimisation in walls of manufactured products.

8 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: invention is related to machine building, namely to technology of manufacture of flexible pipelines coiled from tape materials. Method of flexible pipeline manufacture comprises helical coiling of reinforcing element and tape onto mandrel, shaping of pipeline sleeve and its removal from mandrel, at that tape is pulled through friction mechanism, and in process of coiling is supplied to mandrel shaft in tightened condition, for coiling mandrel with shafts is used, at that shafts have modified surface, and t least part of them is connected to rotation drive, and part of flexible pipeline removed from mandrel is supplied to diverting mechanism, where it is additionally rotated and diverted, affecting by force, vector of which is directed along its axis. Device for manufacture of flexible pipeline comprises support, facilities of tape and reinforcing material supply, assembled mandrel, rotation drive, facility for connection of neighboring tape turns, mandrel is arranged in the form of independent adjusted unit installed in support in the required position, all mandrel shafts have modified surface, and at least half of them is connected to rotation drive via flexible elements of distributing unit, at that device is equipped with friction mechanism for tape tension and diverting mechanism connected to drive and installed with support on one frame.

EFFECT: reduction of finished product damage risk in process of its removal from mandrel, reduction of technological time of changeover for manufacture of air duct of different dimension type and expansion of technological resources.

8 cl, 11 dwg

FIELD: technological processes.

SUBSTANCE: method of power bulkhead formation includes laying of cloth tapes on container in longitudinal direction. Binding tapes are bound with annular layers of cord or cloth tape, and edges of binding tapes are bent from their external side. At the distance that is equal to bulkhead width annular supports are installed with height of not less than the height of formed bulkhead. Edges of tapes are fixed in supports, and annular layers of cord are wound on tapes between supports. Then cloth tapes are laid onto annular layers of cord in longitudinal direction with overthrow and further fixing at the opposite supports. Annular layers of cord are again wound on them. Process is repeated until preset height of bulkhead is obtained. After thermal treatment of container supports are removed. Cloth tapes may be laid in longitudinal direction on container so that free ends of cloth tapes are laid in the opposite sides, and also may be chaotically installed for connection of, for instance, needle or bracket along the whole height of bulkhead or in area of bulkhead connection with container.

EFFECT: joint manufacture of container from composite materials and bulkhead, increase of reliability and strength of bulkhead fixing to the container.

3 cl, 9 dwg.

FIELD: chemical industry; molding devices for production of the plastic pipes.

SUBSTANCE: the invention represents the molding device having the molding ducted work tool making the reciprocating movement and capable to mold the products of the various configuration. The molding device contains the movable molding ducted work tool formed by the molding block arranged behind on the trajectory of molding and at least by one molding block arranged ahead on the trajectory of molding, which both are moving backward and forward on the indicated trajectory. The indicated device also has the extrusion die with at least one channel for the flow of the plastics material, which in turn having the outlet opening, through which the plastics material moves into the molding ducted work tool. The molding block arranged behind on the trajectory of molding has the first and second zones of the molding of the product. At the first stage of the molding in the molding device the indicated first zone is arranged so, that to provide the feeding of the plastics of the plastics materials into it from the outlet opening of the indicated channel, and the indicated second zone remains behind of this opening on the trajectory of molding and molding of the continuous sections of the pipe having corrugations. At the second stage of the molding both indicated zones of the molding block are arranged behind on the trajectory of the molding, the first and the second zones are arranged so, that to provide feeding into the of the plastics materials with the purpose to change the shape of the cross-section of the pipe. The molding block arranged ahead on the trajectory of the molding has the zones of molding of the product intended for reception of the product molded in both indicated zones of the molding block arranged behind on the first and second trajectories of molding.

EFFECT: the invention ensures, that the molding device with the molding ducted work tool making the reciprocating movement is capable to mold the products of the various configurations.

9 cl, 12 dwg

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