Method and apparatus for manufacturing watertight, corrugated metal pipes from a strip of metal sheet, and watertight, corrugated metal pipe manufactured by such method

FIELD: metallurgy; technological processes.

SUBSTANCE: present invention relates to a scope of metal forming, particularly, to method for manufacturing watertight, corrugated metal pipes. Longitudinal corrugations are formed on a strip of metal sheet by successive passages between counterposed corrugating barrels having alternated, circumferential ridges on their outer surfaces The opposite, longitudinal lips of the strip are bent in opposite directions. Then the strip of metal sheet is coiled into a helical shape, whereby the opposite, longitudinal lips overlap laterally. Before the opposite, longitudinal lips are crimped together between counterposed crimping rollers, a rubber gasket is fitted to one of the opposite longitudinal lips. Gasket has a bent profile capable of embracing the longitudinal lip at least partially. Whereby the material of the gasket, by effect of the crimping pressure, is reduced in thickness and deformed plastically at least in certain areas of the longitudinal lips which are biased against each other by the crimping action.

EFFECT: use of a rubber gasket with bent profile results in increased watertightness of the pipe.

10 cl, 11 dwg

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to production of crimped heat-insulated pipeline. Pipeline comprises at least one inner pipe, crimped outer pipe spaced therefrom and made of synthetic material and a ply of foamed synthetic material to fill the spacing between both pipes. First, ply of foam is applied to inner pipe to extrude outer pipe thereat. After extrusion of outer pipe, forming tools are used to make crimps on foam ply.

EFFECT: higher flexibility of pipe.

15 cl, 3 dwg

FIELD: construction.

SUBSTANCE: group of inventions relates to drain bellows, more specifically, to sets of flexible drain bellows, having a flexible part with a preferably smooth surface, and methods of assembly and installation of such flexible devices. According to one of versions of realisation, the set of drain bellows comprises a bellows having the first and second ends and a catching part between the first and second ends, a connector with a sanitary device, a Y-shaped fitting and a drain connection, comprising a flexible hose, having preferably a smooth inner surface. One of versions of the method for installation of the drain bellows between the drain of the sanitary device and the outlet end of the drain pipe consists in the fact that they assemble a drain bellows, a connector with a sanitary device is connected to the drain of the sanitary device. The drain connection is matched with the outlet end of the drain pipe, and it is connected to the outlet end of the drain pipe. The first combined end, the second combined end and the outlet end of the Y-shaped fitting determine the first, second and third longitudinal axes. The first and third longitudinal axes determine the first plane, and the second and third longitudinal axes determine the second plane, which is different from the first one.

EFFECT: group of inventions provides for trapping of smokes, gases and smells in a system of drainage pipes.

27 cl, 12 dwg

FIELD: machine building.

SUBSTANCE: invention refers to production of flexible metal hoses. According to the method first a set of parts is prepared; the set is composed out of not upset or partially upset by length and transverse corrugated chamber with flat end, of wire braiding, of bearing sleeves and of external rings and cartridges. Further the hose is assembled, in the process of which the flat ends of the corrugated chamber are arranged coaxially between the external end and the bearing sleeve and connected between them by contact seam welding. The corrugated chamber is covered from outside with wire braiding. The ends of braiding are arranged coaxially between the external cartridge and the bearing sleeve and welded to each other. The feature of the method is the following: before assembly the corrugated chamber taken from the prepared set is subject to complete upset by length, while coating the corrugated chamber with braiding, coaxial arrangement of its ends between the external cartridge and the bearing sleeve, and connecting ends by welding is performed while the corrugated chamber is compacted with axial force value of which is determined out of expression: where: H is maximal depth of hose submersion during operation, m, γ is density of water, g/cm3; Dy is internal diametre of the corrugated chamber, cm, h is height of corrugation profile, cm.

EFFECT: increased life of metal hose under condition of under water operation.

5 dwg

FIELD: constructional engineering.

SUBSTANCE: invention refers to pipeline design. Piping assembly contains conducting corrugated pipeline, including rising and falling coils, conducting polymer shell arranged along the length of the said corrugated pipeline the aforesaid polymer shell providing conductivity from shell to conducting pipeline having maximum bulk resistivity of about 7×104 Ohm·cm to provide conductivity of electric charge from external surface of polymer shell through conducting polymer shell to conducting metal corrugated pipeline. According to the second version of piping assembly design, the said thermoplastic polymer has minimum tensile strength of about 28 MPa, minimum elongation of about 300%, minimum flexural modulus of about 170 MPa and maximum bulk resistivity about 7×104 Ohm·cm. Assembly is provided with fitting jointed to the said corrugated pipeline on its end.

EFFECT: production of polymer shell of improved conductivity of electric charge to conducting metal corrugated pipeline.

13 cl, 1 dwg, 1 tbl

FIELD: technology for making metal sleeves used under conditions of high temperatures and aggressive environments, for example, in metallurgy for feeding oxygen into oxygen converter, in automobile engineering in systems for discharging exhaust gases of automobiles.

SUBSTANCE: flexible metal sleeve contains bellows mated with sleeve and metallic armor and barrel positioned coaxially on their external surface. Inside the armor on mated end of recess of corrugation of bellows cut ring is positioned. Mated rectilinear portion of corrugation of bellows is held between ring and end surface of sleeve. Ends of bellows and sleeve are connected by welded seam, made on side surface of sleeve and ring along the edge of clamped section of bellows. In particular case of realization of metal sleeve, width of cut ring is equal to width of recess of corrugation of bellows, and its thickness is equal to length of rectilinear portion of corrugation of bellows, while armor, barrel and sleeve are connected by single welded seam.

EFFECT: production of quality welded seam of bellows to flange due to prevented burn-through defects while simultaneously decreasing requirements to qualification of welder.

3 cl, 2 dwg

The invention relates to structures designed for elastic tight connection of the flexible pipe with end fittings

The metal hose // 2140036

The metal hose // 2140035

FIELD: mining.

SUBSTANCE: locking system of the machine is provided between the guide of the sleeve and the locking ring of the assembly of punch of the hole-punching machine with CNC. In case of necessity to adjust the length of the extension of the punch to the depth of cut, the locking ring and the guide sleeve are locked by the locking mechanism, as a result the whole mechanism turns into the mode of adjustment, and pressing the upper locking ring by hand is not necessary. When adjustment of the length of the punch to the depth of cut is complete, it is necessary to press the hook pin to unlock the locking mechanism, and the locking ring returns to its initial position.

EFFECT: simplification of adjustment process.

2 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: inventions relate to metal forming and can be used in forging with burnishing. Billet is arranged between two rolls, each having shaped working surface corresponding to that of finished part. Billet is burnished by rolls swinging in opposite directions with the help of drive. Note here that rolls are pressed to billet with burnishing force. Burnishing is performed in turns in lateral directions relative to billet lengthwise axis. Proposed device comprises frame, top and bottom rolls having toothed sectors, two drive hydraulic cylinders and two rotary hydraulic cylinders. Drive hydraulic cylinders have hinged levers that make four-link mechanism to lift and down top roll and impart burnishing force to it. Rotary hydraulic cylinder rods are articulated with rocker to transfer angular momentum and burnishing force to bottom roll. Wedge mechanism is arranged to lift and down bottom roll and to transfer burnishing force to it. Top roll is turned because its toothed sector engages with bottom roll toothed sector, bottom roll displacing toothed rack with billet.

EFFECT: higher quality of forged parts.

10 cl, 12 dwg

FIELD: metallurgy.

SUBSTANCE: device includes first selvage motion roller for formation of biflex elements on both straight edges of metal strip, cutting rollers, implemented with ability of cutting of extracted from first selvage motion rollers metallic strip lengthway for two strips along the straight or wave-like lines. Additionally mentioned rollers are able to alternation of angle of horizontal rotation. It is also plate-flanging facility for connection of single curved element with biflex element with curling of cut metal strip in the form of spiral. On both straight edges of metallic strip there are formed biflex elements. Metallic strip is cut lengthwise for two strips by wave-like or straight lines by means of cutting rollers. It is formed single curved element on wave-like edge and it is connected to biflex element with curling of cut metal strip. It is also possible continuous cutting of metal strip by straight and wave-like lines lengthwise. For cutting of strip by straight line cutting rollers are located parallel to metal strip on the section of metal strip input and on the section of metal strip end. Cut metal strip is curled with integration of linear connecting boxes with both ends of curvilinear box. Additionally for cutting of strip by straight and wave-like lines there are alternated angles of horizontal rotation.

EFFECT: there are extended manufacturing capabilities, there are increase accuracy and reliability of connection.

7 cl, 17 dwg

FIELD: metallurgy.

SUBSTANCE: method of press forming with rolling includes placement of stock in matrix set on die plate and rolling of stock with rolling press connected to drive which transfers oscillatory movement to rolling press when it is pressed to stock with force. The rolling press is equipped with a gear sector, and the die plate is equipped with a gear rack. When the stock is rolled with the rolling press, gears of the gear sector are in constant mesh with gears of the gear rack to facilitate rolling conditions. The device for die forming with rolling contains the rolling press and the matrix, installed on the die plate for stock placement thereon. The drive of the device connected to the rolling press facilitates pressing of the rolling press to the stock with force, the drive also transfers oscillating movement to the rolling press for rolling the stock with a working surface of the rolling press. The rolling press is equipped with the gear sector, and the die plate is equipped with a gear rack corresponding to the gear sector. The gears of the gear sector are designed to mesh with the gears of the gear rack.

EFFECT: there is facilitated reduction of maximum force of die forming and of speed of rolling.

10 cl, 9 dwg

FIELD: plastic working of metals, possibly manufacture of parts such as flanged tubes.

SUBSTANCE: method comprises steps of end expanding of hot part at deformation temperature less than that of forging and simultaneously expanding diameter of under-flange portion of tube blank and shaping flange in rotating annular die by means of inclined punch fed along axis of tube blank. Process of end rolling out is realized for producing parts having flange thickness less than that of wall of tube blank and under-flange portion of tube blank in the form of truncated cone or cylinder with diameter exceeding by 1.2 - 1.05 diameter of tube blank. Punch is fed by inclination angle 4 - 6° relative to axis of tube blank.

EFFECT: improved quality of parts.

1 dwg

The invention relates to machines for hot or cold die forging forging method of the local deformation, implemented on presses for stamping-forging

The invention relates to equipment for stretching-card-mounting presses used in the formation of large parts of double curvature in the aerospace industry, and can be used in shipbuilding and other industries, including for another purpose

The invention relates to a hot body stamping parts like flanges, disks, and so on

The invention relates to the field of metal forming and can be used in the manufacture of a new generation of the defining details of sensor equipment, radio and video equipment, bakery and milk processing, in the medical equipment in the manufacture of containers for storage of blood and long-term blood analyzers to AIDS, as well as the manufacture of basic elements bioproof-readers-converters, the determining module protection from electromagnetic fields from cell phones and Express analyzers abnormal growths of muscle tissue

The invention relates to the field of metal forming and can be used in the manufacture of a new generation of the defining details of sensor equipment, radio and video equipment, bakery and milk processing, in the medical equipment in the manufacture of containers for storage of blood and long-term blood analyzers to AIDS, as well as the manufacture of basic elements bioproof-readers-converters, the determining module protection from electromagnetic fields from cell phones, Express analyzers abnormal growths of muscle tissue and bio-Informatics systems

FIELD: plastic working of metals, possibly manufacture of parts such as flanged tubes.

SUBSTANCE: method comprises steps of end expanding of hot part at deformation temperature less than that of forging and simultaneously expanding diameter of under-flange portion of tube blank and shaping flange in rotating annular die by means of inclined punch fed along axis of tube blank. Process of end rolling out is realized for producing parts having flange thickness less than that of wall of tube blank and under-flange portion of tube blank in the form of truncated cone or cylinder with diameter exceeding by 1.2 - 1.05 diameter of tube blank. Punch is fed by inclination angle 4 - 6° relative to axis of tube blank.

EFFECT: improved quality of parts.

1 dwg

FIELD: metallurgy.

SUBSTANCE: method of press forming with rolling includes placement of stock in matrix set on die plate and rolling of stock with rolling press connected to drive which transfers oscillatory movement to rolling press when it is pressed to stock with force. The rolling press is equipped with a gear sector, and the die plate is equipped with a gear rack. When the stock is rolled with the rolling press, gears of the gear sector are in constant mesh with gears of the gear rack to facilitate rolling conditions. The device for die forming with rolling contains the rolling press and the matrix, installed on the die plate for stock placement thereon. The drive of the device connected to the rolling press facilitates pressing of the rolling press to the stock with force, the drive also transfers oscillating movement to the rolling press for rolling the stock with a working surface of the rolling press. The rolling press is equipped with the gear sector, and the die plate is equipped with a gear rack corresponding to the gear sector. The gears of the gear sector are designed to mesh with the gears of the gear rack.

EFFECT: there is facilitated reduction of maximum force of die forming and of speed of rolling.

10 cl, 9 dwg

FIELD: metallurgy.

SUBSTANCE: device includes first selvage motion roller for formation of biflex elements on both straight edges of metal strip, cutting rollers, implemented with ability of cutting of extracted from first selvage motion rollers metallic strip lengthway for two strips along the straight or wave-like lines. Additionally mentioned rollers are able to alternation of angle of horizontal rotation. It is also plate-flanging facility for connection of single curved element with biflex element with curling of cut metal strip in the form of spiral. On both straight edges of metallic strip there are formed biflex elements. Metallic strip is cut lengthwise for two strips by wave-like or straight lines by means of cutting rollers. It is formed single curved element on wave-like edge and it is connected to biflex element with curling of cut metal strip. It is also possible continuous cutting of metal strip by straight and wave-like lines lengthwise. For cutting of strip by straight line cutting rollers are located parallel to metal strip on the section of metal strip input and on the section of metal strip end. Cut metal strip is curled with integration of linear connecting boxes with both ends of curvilinear box. Additionally for cutting of strip by straight and wave-like lines there are alternated angles of horizontal rotation.

EFFECT: there are extended manufacturing capabilities, there are increase accuracy and reliability of connection.

7 cl, 17 dwg

Up!