CN101749503B - Duplex metal compound flange pipe fitting having flange connection on end and manufacturing method thereof - Google Patents

Duplex metal compound flange pipe fitting having flange connection on end and manufacturing method thereof Download PDF

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Publication number
CN101749503B
CN101749503B CN2009102545990A CN200910254599A CN101749503B CN 101749503 B CN101749503 B CN 101749503B CN 2009102545990 A CN2009102545990 A CN 2009102545990A CN 200910254599 A CN200910254599 A CN 200910254599A CN 101749503 B CN101749503 B CN 101749503B
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pipe
flange
welding
corrosion resistant
bimetal
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CN101749503A (en
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王永芳
张燕飞
郭崇晓
魏帆
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Xian Sunward Aerospace Material Co Ltd
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Xian Sunward Aerospace Material Co Ltd
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Abstract

The invention discloses a duplex metal compound flange pipe fitting having flange connection on end and a manufacturing method thereof. The duplex metal compound flange pipe fitting comprises a duplex metal compound flange pipe short piece and a flange connector which is coaxially sealing sleeved on one or more connecting ports of the duplex metal compound flange pipe short piece, wherein the flange connector comprises a flange tray and an anticorrosion alloy backing ring which is coaxially sealed on the flange tray, and an annular groove which is arranged for mounting the anticorrosion alloy backing ring is placed on the middle part of the sealing side of the flange. The manufacturing method thereof comprises the following steps of: processing the duplex metal compound flange pipe short piece, processing the annular groove, fixing the flange, processing and installing the anticorrosion alloy backing ring, welding the anticorrosion alloy backing ring and a lining pipe with the sealing side and follow-up processing. The manufacturing technique is simple, the method is convenient to perform and the cost is low. The processed duplex metal compound flange pipe fitting has excellent anticorrosion property which can solve the problems that the corrosive medium pipeline flange has high manufacturing cost, narrow application scope and inferior anticorrosion property, and the like.

Description

The end is bimetal composite flange pipe fitting and the machining manufacture thereof that flange connects
Technical field
The invention belongs to composite bimetal pipe and connect the manufacturing technical field of using composite flange, especially relating to a kind of end is bimetal composite flange pipe fitting and the machining manufacture thereof that flange connects.
Background technique
When Ordinary Steel pipe or alloy steel pipe use in Korrosionsmedium, serious corrosion phenomenon very easily takes place, corrosion resistant alloy pipelines such as stainless steel then can't obtain to be extensive use of because cost is high, thereby nowadays Korrosionsmedium uses the use problem of being able to bear strong corrosion property metallic conduit never effectively to be solved.Find that after deliberation composite bimetal pipe can effectively solve the expensive problem of corrosion resistant alloy pipelines such as not the being able to bear strong corrosion property problem of Ordinary Steel pipe or alloy steel pipe and stainless steel.Piping flange is the most widely used a kind of releasable connection part of industrial piping system as a kind of link, never solves but can apply the composite flange that is complementary with composite bimetal pipe.A kind of build-up composite flange and manufacture method thereof have been disclosed July 30 in 2008 among the disclosed utility application CN101230942, this method is by being processed into steel flange with blank 201 type stainless steel materials, built-up welding 304 type stainless steel sealing surfaces on the flange seal position then, become standard flange with lathe cutting at last, during actual processing and fabricating, manufacturing process complexity and cost of raw material height, thereby be not suitable for applying on a large scale.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned deficiency of the prior art, and it is the bimetal composite flange pipe fitting that flange connects that a kind of simple in structure, reasonable in design, easily manufactured and end that corrosion resisting property is superior is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of end is the bimetal composite flange pipe fitting that flange connects, and it is characterized in that: comprise that composite bimetal pipe pipe nipple and co-axial seal are sleeved on the flange connector on the one or more connecting ports of described composite bimetal pipe pipe nipple; Described flange connector comprises that co-axial seal is sleeved on flange plate on the described composite bimetal pipe pipe nipple connecting port and co-axial seal and is arranged on corrosion resistant alloy gasket ring on the flange plate, and the sealing surface middle part of described flange plate is provided with the annular groove of installing for the corrosion resistant alloy gasket ring; Described composite bimetal pipe pipe nipple is made up of the outer tube that internal lining pipe and coaxial package are fixed on the internal lining pipe outside, and the internal lining pipe at place, described connecting port stretches out from outer tube and extrusion is not more than the thickness of corrosion resistant alloy gasket ring, and the bottom surface of the annular groove of offering is mutually concordant in the middle part of the exterior edge face of outer tube and the suit flange plate thereon.
Joint between described corrosion resistant alloy gasket ring and internal lining pipe is set to be convenient to the arc angle of seal welding, and the degree of depth of described arc angle is no more than the thickness of corrosion resistant alloy gasket ring.
The thickness of described corrosion resistant alloy gasket ring is not less than the degree of depth of described annular groove, and the thickness of described corrosion resistant alloy gasket ring is more than or equal to the wall thickness of internal lining pipe.
The described composite bimetal pipe pipe nipple not connecting port of mounting flange link is provided with bevel for welding or screw connection structure.
The length that described internal lining pipe stretches out from outer tube is 1~9mm, and the degree of depth of described annular groove is 0.5~3mm, and the thickness of described corrosion resistant alloy gasket ring is 2~10mm.
Described composite bimetal pipe pipe nipple is the compound straight tube pipe nipple of bimetal, the compound reducer pipe nipple of bimetal, bimetal composite-curve pipe nipple or the compound three-way pipe pipe nipple of bimetal.
Simultaneously, the invention also discloses a kind of manufacturing process simple, realize convenient and processing cost is low, the measured end of processed product matter is the machining manufacture of the bimetal composite flange pipe fitting that connects of flange, it is characterized in that this method may further comprise the steps:
Step 1, the processing of composite bimetal pipe pipe nipple: the composite bimetal pipe pipe nipple that with machining equipment composite bimetal pipe is cut and is processed into required form earlier; Afterwards, adopt machining equipment to remove one section outer tube from outside to inside, just obtain the composite bimetal pipe pipe nipple of machine shaping in one or more connecting ports of described composite bimetal pipe pipe nipple;
Step 2, annular groove processing: adopt machining equipment at the sealing surface middle part processing annular groove of the flange plate of machine shaping standard flange in advance, obtain the processing flange;
Step 3, flange fixed installation: the flange plate coaxial package of the flange of processing described in the step 2 on the outer tube at place, described composite bimetal pipe pipe nipple connecting port, and is made that the bottom surface of described annular groove is mutually concordant with the exterior edge face of outer tube; Afterwards, adopt welding equipment that fixing and corresponding formation fillet weld one are welded in the joint between flange plate inner end and outer tube outer wall, should make internal lining pipe be under the inert gas shielding all the time in the welding process, should guarantee that simultaneously the central axis of flange plate and the central axis of described composite bimetal pipe pipe nipple are located along the same line, and used scolder is welding consumables identical with the material of outer tube or that be complementary; External diameter and the material of the two that the internal diameter of described flange plate is not less than outer tube are identical;
The processing of step 4, corrosion resistant alloy gasket ring: adopt in one of machining equipment processing and the step 2 the corresponding corrosion resistant alloy gasket ring of the circular groove structure of processing, the material of described corrosion resistant alloy gasket ring is identical with the material of internal lining pipe;
Step 5, corrosion resistant alloy gasket ring are installed: the corrosion resistant alloy gasket ring that machines in the step 4 is packed in the described annular groove;
Welding is fixing between step 6, corrosion resistant alloy gasket ring and internal lining pipe: adopt welding equipment and under shielding gas atmosphere built-up welding is carried out in joint between corrosion resistant alloy gasket ring and internal lining pipe, and corresponding formation fillet weld two, used scolder is welding consumables identical with the material of internal lining pipe or that be complementary; Before the welding, when the wall thickness of internal lining pipe>1mm, adopt machining equipment processing arc angle in joint between corrosion resistant alloy gasket ring and internal lining pipe earlier, the degree of depth of described arc angle is no more than the thickness of corrosion resistant alloy gasket ring;
Interface seal welding between the sealing surface of step 7, corrosion resistant alloy gasket ring and flange plate: adopt welding equipment and under shielding gas atmosphere, the interface between corrosion resistant alloy gasket ring and sealing surface is welded, should make internal lining pipe inside be under the inert gas shielding all the time in the welding process, used scolder is the welding consumables that all has good welds with outer tube material and internal lining pipe material, and corresponding formation fillet weld three;
Step 8, following process: adopt machining equipment to remove the reinforcement of weld seam two and fillet weld three, the exterior edge face with sealing surface, corrosion resistant alloy gasket ring and internal lining pipe processes smooth smooth simultaneously.
The material of internal lining pipe described in the above-mentioned steps one is stainless steel, nickel-base alloy, Cuprum alloy, titanium alloy or aluminum alloy material; The material of described outer tube is carbon steel, alloyed steel or Cu alloy material.
When welding fixedly to the joint between flange plate inner end and outer tube outer wall described in the above-mentioned steps three, used welding equipment is arc welding welding machine or argon arc welding welding machine, and welding current is 100~180A; When built-up welding was carried out in the joint between corrosion resistant alloy gasket ring and internal lining pipe, used welding equipment was arc welding welding machine or argon arc welding welding machine described in the step 6, and welding current is 30~100A; When described in the step 7 interface between corrosion resistant alloy gasket ring and sealing surface being welded, used welding equipment is arc welding welding machine or argon arc welding welding machine, and welding current is 100~180A.
Material, the structure and measure-alike of the composite bimetal pipe that the material of composite bimetal pipe pipe nipple, structure and size described in the above-mentioned steps one all be connected with need.
The present invention compared with prior art has the following advantages:
1, novelty reasonable in design, simple in structure, manufacturing process are simply, realization is convenient and the manufacturing cost is low, utilizes standard flange to process.
2, corrosion resisting property is superior and sealability is good, and its composite bimetal pipe pipe nipple internal lining pipe stretches out the welding consumables welding of the same race that is welded as between the part of outer tube and sealing surface gasket ring (being the corrosion resistant alloy gasket ring); And the welding between outer tube and flange plate (being sealing surface) also is welding consumables welding of the same race.
In sum, manufacturing process of the present invention is simple, realization is convenient and processing cost is low, the corrosion resisting property of institute's processed duplex metal composite flange pipe fitting is superior, have remarkable economic efficiency, can effectively solve the existing manufacture cost height of Korrosionsmedium piping flange, the face of applying is narrow or practical problem such as poor corrosion resistance.
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of first kind of embodiment of institute's processed duplex metal composite flange pipe fitting of the present invention.
Fig. 2 is the method flow diagram of manufacturing bimetal composite flange pipe fitting of the present invention.
Fig. 3 is the structural representation of second kind of embodiment of institute's processed duplex metal composite flange pipe fitting of the present invention.
Fig. 4 is the structural representation of institute of the present invention the third embodiment of processed duplex metal composite flange pipe fitting.
Fig. 5 is the structural representation of the 4th kind of embodiment of institute's processed duplex metal composite flange pipe fitting of the present invention.
Fig. 6 is the structural representation of the 5th kind of embodiment of institute's processed duplex metal composite flange pipe fitting of the present invention.
Description of reference numerals:
The 1-flange plate; 2-corrosion resistant alloy gasket ring; The 3-outer tube;
The 4-internal lining pipe; 5-fillet weld two; 6-fillet weld three;
7-fillet weld one; The 8-sealing surface.
Embodiment
Embodiment 1
A kind of end as shown in Figure 1 is the bimetal composite flange pipe fitting that flange connects, and comprises that composite bimetal pipe pipe nipple and co-axial seal are sleeved on the flange connector on the one or more connecting ports of described composite bimetal pipe pipe nipple.Described flange connector comprises that co-axial seal is sleeved on flange plate 1 on the described composite bimetal pipe pipe nipple connecting port and co-axial seal and is arranged on corrosion resistant alloy gasket ring 2 on the flange plate 1, and sealing surface 8 middle parts of described flange plate 1 are provided with the annular groove of installing for corrosion resistant alloy gasket ring 2.Described composite bimetal pipe pipe nipple is made up of the outer tube 3 that internal lining pipe 4 and coaxial package are fixed on internal lining pipe 4 outsides, and the internal lining pipe 4 at place, described connecting port stretches out from outer tube 3 and extrusion is not more than the thickness of corrosion resistant alloy gasket ring 2, and the exterior edge face of outer tube 3 is mutually concordant with the bottom surface of suit flange plate 1 annular groove that the middle part is offered thereon.
The joint that described corrosion resistant alloy gasket ring 2 and internal lining pipe are 4 is set to be convenient to the arc angle of seal welding, and the degree of depth of described arc angle is no more than the thickness of corrosion resistant alloy gasket ring 2.The thickness of described corrosion resistant alloy gasket ring 2 is not less than the degree of depth of described annular groove, and the thickness of described corrosion resistant alloy gasket ring 2 is more than or equal to the wall thickness of internal lining pipe 4.The described composite bimetal pipe pipe nipple not connecting port of mounting flange link is provided with bevel for welding or screw connection structure.
During actual processing and fabricating, the length that described internal lining pipe 4 stretches out from outer tube 3 is 1~9mm, and the degree of depth of described annular groove is 0.5~3mm, and the thickness of described corrosion resistant alloy gasket ring 2 is 2~10mm.
In the present embodiment, described composite bimetal pipe pipe nipple is the compound straight tube pipe nipple of bimetal.
A kind of end as shown in Figure 2 is the machining manufacture of the bimetal composite flange pipe fitting of flange connection, may further comprise the steps:
Step 1, the processing of composite bimetal pipe pipe nipple: the composite bimetal pipe pipe nipple that with machining equipment composite bimetal pipe is cut and is processed into required form earlier; Afterwards, adopt machining equipment to remove one section outer tube 3 from outside to inside, just obtain the composite bimetal pipe pipe nipple of machine shaping in one or more connecting ports of described composite bimetal pipe pipe nipple.
Material, the structure and measure-alike of the composite bimetal pipe that the material of described composite bimetal pipe pipe nipple, structure and size all be connected with need, and the compound straight tube pipe nipple of the described bimetal underpart of institute's machine shaping is provided with bevel for welding or screw connection structure.
In the present embodiment, adopt cutting equipment composite bimetal pipe to be cut and obtains one or more straight line shape composite bimetal pipe pipe nipples.The material of described internal lining pipe 4 is the 316L stainless steel; The material of described outer tube 3 is 20 steel, and the specification of described composite bimetal pipe is Φ 76 * (4+1.0) mm.After adopting machining equipment to remove the outer tube 3 of described composite bimetal pipe pipe nipple upper end portion, make internal lining pipe 4 from outer tube 3, stretch out 2mm.
Step 2, annular groove processing: adopt machining equipment at the sealing surface 8 middle parts processing annular groove of the flange plate 1 of machine shaping standard flange in advance, obtain the processing flange.
In the present embodiment, the degree of depth of the annular groove of processing is 1mm.
Step 3, flange fixed installation: flange plate 1 coaxial package of the flange of processing described in the step 2 on the outer tube 3 at place, described composite bimetal pipe pipe nipple connecting port, and is made that the bottom surface of described annular groove is mutually concordant with the exterior edge face of outer tube 3; Afterwards; adopt welding equipment that fixing and corresponding formation fillet weld 1 are welded in the joint between flange plate 1 inner end and outer tube 3 outer walls; should make internal lining pipe 4 be under the inert gas shielding all the time in the welding process; should guarantee that simultaneously the central axis of flange plate 1 and the central axis of described composite bimetal pipe pipe nipple are located along the same line, and used scolder is welding consumables identical with the material of outer tube 3 or that be complementary.External diameter and the material of the two that the internal diameter of described flange plate 1 is not less than outer tube 3 are identical.
Actually add man-hour, to flange plate 1 inner end is joint between underpart and outer tube 3 outer walls when welding fixedly, and used welding equipment is arc welding welding machine or argon arc welding welding machine, and welding current is 100~180A, during actual welding, also can select for use other type of welder to carry out welding operation.In the present embodiment, employing arc welding welding machine welds and welding current is 100A.
2 processing of step 4, corrosion resistant alloy gasket ring: adopt in one of machining equipment processing and the step 2 the corresponding corrosion resistant alloy gasket ring 2 of the circular groove structure of processing, the material of described corrosion resistant alloy gasket ring 2 is identical with the material of internal lining pipe 4.
The thickness of described corrosion resistant alloy gasket ring 2 is more than or equal to the wall thickness of internal lining pipe 4, and the thickness of described corrosion resistant alloy gasket ring 2 is 2~10mm, can adjust accordingly according to the thickness of concrete needs to corrosion resistant alloy gasket ring 2 in the actual course of working.In the present embodiment, the thickness of processing corrosion resistant alloy gasket ring 2 in the step 4 is 5mm.
Step 5, corrosion resistant alloy gasket ring 2 installed: the corrosion resistant alloy gasket ring 2 that machines in the step 4 is packed in the described annular groove.During as installed, can adopt to be pressed into or embedded mode is installed.
Step 6, corrosion resistant alloy gasket ring 2 and 4 welding of internal lining pipe are fixing: adopt welding equipment and under shielding gas atmosphere corrosion resistant alloy gasket ring 2 and 4 joints of internal lining pipe are carried out built-up welding, and corresponding formation fillet weld 25, used scolder is welding consumables identical with the material of internal lining pipe 4 or that be complementary; Before the welding, when the wall thickness of internal lining pipe 4>1mm, adopt machining equipment to process arc angle in 4 joints of corrosion resistant alloy gasket ring 2 and internal lining pipe earlier, the degree of depth of described arc angle is no more than the thickness of corrosion resistant alloy gasket ring 2.
When built-up welding is carried out in the joint of 4 of corrosion resistant alloy gasket ring 2 and internal lining pipes, used welding equipment is arc welding welding machine or argon arc welding welding machine, welding current is that the thick more used welding current of 30~100A and internal lining pipe 4 is big more, during actual welding, also can select for use other type of welder to carry out welding operation.In the present embodiment, adopt the arc welding welding machine that the joint of 4 of corrosion resistant alloy gasket ring 2 and internal lining pipes is welded, and welding current is 30A.
The interface seal welding that the sealing surface of step 7, corrosion resistant alloy gasket ring 2 and flange plate 1 outer end is 8: adopt welding equipment and under shielding gas atmosphere the interface to 8 of corrosion resistant alloy gasket ring 2 and sealing surfaces weld; should make internal lining pipe 4 inside be under the inert gas shielding all the time in the welding process; used scolder is the welding consumables that all has good welds with outer tube 3 materials and internal lining pipe 4 materials, and corresponding formation fillet weld 36.
When the interface of 8 of corrosion resistant alloy gasket ring 2 and sealing surfaces was welded, used welding equipment was arc welding welding machine or argon arc welding welding machine, and welding current is 100~180A, during actual welding, also can select for use other type of welder to carry out welding operation.
In the present embodiment, adopting the arc welding welding machine is the interface of 8 of the sealing surfaces of upper end portion when carrying out seal welding to corrosion resistant alloy gasket ring 2 and flange plate 1 outer end, and welding current is 100A.
Step 8, following process: adopt machining equipment to remove the reinforcement of weld seam 25 and fillet weld 36, the exterior edge face with sealing surface 8, corrosion resistant alloy gasket ring 2 and internal lining pipe 4 processes smooth smooth simultaneously.Actually add man-hour, can adopt lathe and hand grinding tool or electronic milling tools to carry out following process and handle.
Embodiment 2
As shown in Figure 3, in the present embodiment, as different from Example 1: the used composite bimetal pipe pipe nipple of manufacturing is the compound reducer pipe nipple of bimetal, and is provided with and flange connector in two connecting ports up and down of the compound reducer pipe nipple of described bimetal.In the present embodiment, the structure of described two flange connectors, process for machining and manufacturing and process parameter are all identical with embodiment 1.
Embodiment 3
As shown in Figure 4, in the present embodiment, as different from Example 1: the used composite bimetal pipe pipe nipple of manufacturing is a bimetal composite-curve pipe nipple, and is provided with and flange connector in two connecting ports up and down of described bimetal composite-curve pipe nipple.In the present embodiment, the structure of described two flange connectors, process for machining and manufacturing and process parameter are all identical with embodiment 1.
Embodiment 4
As shown in Figure 5, in the present embodiment, as different from Example 1: the used composite bimetal pipe pipe nipple of manufacturing is the compound three-way pipe pipe nipple of bimetal, and is provided with and flange connector in three connecting ports (comprising three connecting ports in the top and the left and right sides) of the compound three-way pipe pipe nipple of described bimetal.In the present embodiment, the structure of described three flange connectors, process for machining and manufacturing and process parameter are all identical with embodiment 1.
Embodiment 5
As shown in Figure 6, in the present embodiment, as different from Example 1: described flange plate 1 is band footpath flange.In the present embodiment, institute machine shaping end is that structure, all the other process step and the process parameter of the bimetal composite flange pipe fitting that connects of flange is all identical with embodiment 1.
Embodiment 6
In the present embodiment, as different from Example 1: to described end is that bimetal composite flange pipe fitting that flange connects is when carrying out processing and fabricating, the material of internal lining pipe described in the step 14 is a nickel-base alloy, the material of described outer tube 3 is an alloyed steel, and the specification of described composite bimetal pipe is Φ 273 * (10+2.0) mm.After adopting machining equipment (specifically being lathe) to remove the outer tube 3 of described composite bimetal pipe pipe nipple upper end portion, make internal lining pipe 4 from outer tube 3, stretch out 3mm.The degree of depth of the annular groove of processing is 2mm in the step 2.Adopt the argon arc welding welding machine that the joint between flange plate 1 underpart and outer tube 3 outer walls is welded in the step 3, internal lining pipe 4 is under the inert gas shielding all the time, and welding current is 140A.The thickness of processing corrosion resistant alloy gasket ring 2 in the step 4 is 7mm.Adopt the argon arc welding welding machine that the joint of 4 of corrosion resistant alloy gasket ring 2 and internal lining pipes is welded in the step 6, internal lining pipe 4 is under the inert gas shielding all the time, and welding current is 50A.In the step 7, adopt the argon arc welding welding machine that the interface of 8 of corrosion resistant alloy gasket ring 2 and sealing surfaces is carried out seal welding, internal lining pipe 4 is under the inert gas shielding all the time, and welding current is 140A.In the present embodiment, institute machine shaping end is that structure, all the other process step and the process parameter of the bimetal composite flange pipe fitting that connects of flange is all identical with embodiment 1.
Embodiment 7
In the present embodiment, as different from Example 1: to described end is that bimetal composite flange pipe fitting that flange connects is when carrying out processing and fabricating, the material of internal lining pipe described in the step 14 is a titanium alloy, the material of described outer tube 3 is a Cuprum alloy, and the specification of described composite bimetal pipe is Φ 45 * (3.5+1.0) mm.After adopting machining equipment (specifically being lathe) to remove the outer tube 3 of described composite bimetal pipe pipe nipple upper end portion, make internal lining pipe 4 from outer tube 3, stretch out 2.5mm.The degree of depth of the annular groove of processing is 0.5mm in the step 2.Adopt the arc welding welding machine that the joint between flange plate 1 underpart and outer tube 3 outer walls is welded in the step 3, internal lining pipe 4 is under the inert gas shielding all the time, and welding current is 120A.The thickness of processing corrosion resistant alloy gasket ring 2 in the step 4 is 2mm.Adopt the arc welding welding machine that the joint of 4 of corrosion resistant alloy gasket ring 2 and internal lining pipes is welded in the step 6, should make internal lining pipe 4 be under the inert gas shielding all the time in the welding process and welding current is 40A.In the step 7, adopt the argon arc welding welding machine that the interface of 8 of corrosion resistant alloy gasket ring 2 and sealing surfaces is carried out seal welding, should make internal lining pipe 4 be under the inert gas shielding all the time in the welding process and welding current is 120A.In the present embodiment, institute machine shaping end is that structure, all the other process step and the process parameter of the bimetal composite flange pipe fitting that connects of flange is all identical with embodiment 1.
Embodiment 8
In the present embodiment, as different from Example 1: to described end is that bimetal composite flange pipe fitting that flange connects is when carrying out processing and fabricating, after adopting machining equipment (specifically being lathe) to remove the outer tube 3 of described composite bimetal pipe pipe nipple upper end portion in the step 1, make internal lining pipe 4 from outer tube 3, stretch out 1mm.Adopt the arc welding welding machine that the joint between flange plate 1 underpart and outer tube 3 outer walls is welded in the step 3.In the present embodiment, institute machine shaping end is that structure, all the other process step and the process parameter of the bimetal composite flange pipe fitting that connects of flange is all identical with embodiment 1.
Embodiment 9
In the present embodiment, as different from Example 6: after adopting machining equipment (specifically being lathe) to remove the outer tube 3 of described composite bimetal pipe pipe nipple upper end portion in the step 1, make internal lining pipe 4 from outer tube 3, stretch out 9mm.The degree of depth of the annular groove of processing is 3mm in the step 2.Adopt the arc welding welding machine that the joint between flange plate 1 underpart and outer tube 3 outer walls is welded in the step 3, internal lining pipe 4 is under the inert gas shielding all the time, and welding current is 180A.Adopt the arc welding welding machine that the joint of 4 of corrosion resistant alloy gasket ring 2 and internal lining pipes is welded in the step 6, should make internal lining pipe 4 be under the inert gas shielding all the time in the welding process and welding current is 100A.The thickness of processing corrosion resistant alloy gasket ring 2 in the step 4 is 10mm.In the step 7, adopt the argon arc welding welding machine that the interface of 8 of corrosion resistant alloy gasket ring 2 and sealing surfaces is carried out seal welding, should make internal lining pipe 4 be under the inert gas shielding all the time in the welding process and welding current is 180A.In the present embodiment, institute machine shaping end is that structure, all the other process step and the process parameter of the bimetal composite flange pipe fitting that connects of flange is all identical with embodiment 6.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.

Claims (9)

1. an end is the bimetal composite flange pipe fitting that flange connects, and it is characterized in that: comprise that composite bimetal pipe pipe nipple and co-axial seal are sleeved on the flange connector on the one or more connecting ports of described composite bimetal pipe pipe nipple; Described flange connector comprises that co-axial seal is sleeved on flange plate (1) on the described composite bimetal pipe pipe nipple connecting port and co-axial seal and is arranged on corrosion resistant alloy gasket ring (2) on the flange plate (1), and sealing surface (8) middle part of described flange plate (1) is provided with the annular groove of installing for corrosion resistant alloy gasket ring (2); Described composite bimetal pipe pipe nipple is made up of the outer tube (3) that internal lining pipe (4) and coaxial package are fixed on internal lining pipe (4) outside, and the internal lining pipe (4) at place, described connecting port stretches out from outer tube (3) and extrusion is not more than the thickness of corrosion resistant alloy gasket ring (2), and the bottom surface of the annular groove of offering is mutually concordant in the middle part of the exterior edge face of outer tube (3) and the suit flange plate (1) thereon; The length that described internal lining pipe (4) stretches out from outer tube (3) is 1~9mm, and the degree of depth of described annular groove is 0.5~3mm, and the thickness of described corrosion resistant alloy gasket ring (2) is 2~10mm.
2. be the bimetal composite flange pipe fitting that flange connects according to the described end of claim 1, it is characterized in that: the joint between described corrosion resistant alloy gasket ring (2) and internal lining pipe (4) is set to be convenient to the arc angle of seal welding, and the degree of depth of described arc angle is no more than the thickness of corrosion resistant alloy gasket ring (2).
3. be the bimetal composite flange pipe fitting that flange connects according to claim 1 or 2 described ends, it is characterized in that: the thickness of described corrosion resistant alloy gasket ring (2) is not less than the degree of depth of described annular groove, and the thickness of described corrosion resistant alloy gasket ring (2) is more than or equal to the wall thickness of internal lining pipe (4).
4. be the bimetal composite flange pipe fitting that flange connects according to claim 1 or 2 described ends, it is characterized in that: the described composite bimetal pipe pipe nipple not connecting port of mounting flange link is provided with bevel for welding or screw connection structure.
5. be the bimetal composite flange pipe fitting that flange connects according to claim 1 or 2 described ends, it is characterized in that: described composite bimetal pipe pipe nipple is the compound straight tube pipe nipple of bimetal, the compound reducer pipe nipple of bimetal, bimetal composite-curve pipe nipple or the compound three-way pipe pipe nipple of bimetal.
6. a manufacturing end as claimed in claim 1 is the method for the bimetal composite flange pipe fitting that connects of flange, it is characterized in that this method may further comprise the steps:
Step 1, the processing of composite bimetal pipe pipe nipple: the composite bimetal pipe pipe nipple that with machining equipment composite bimetal pipe is cut and is processed into required form earlier; Afterwards, adopt machining equipment to remove one section outer tube (3) from outside to inside, just obtain the composite bimetal pipe pipe nipple of machine shaping in one or more connecting ports of described composite bimetal pipe pipe nipple;
Step 2, annular groove processing: adopt machining equipment at sealing surface (8) the middle part processing annular groove of the flange plate of machine shaping standard flange (1) in advance, obtain the processing flange;
Step 3, flange fixed installation: flange plate (1) coaxial package of the flange of processing described in the step 2 on the outer tube (3) at place, described composite bimetal pipe pipe nipple connecting port, and is made that the bottom surface of described annular groove is mutually concordant with the exterior edge face of outer tube (3); Afterwards, adopt welding equipment that fixing and corresponding formation fillet weld one (7) are welded in the joint between flange plate (1) inner end and outer tube (3) outer wall, should make internal lining pipe (4) be under the inert gas shielding all the time in the welding process, should guarantee that simultaneously the central axis of flange plate (1) and the central axis of described composite bimetal pipe pipe nipple are located along the same line, and used scolder is welding consumables identical with the material of outer tube (3) or that be complementary; External diameter and the material of the two that the internal diameter of described flange plate (1) is not less than outer tube (3) are identical;
The processing of step 4, corrosion resistant alloy gasket ring (2): adopt in one of machining equipment processing and the step 2 the corresponding corrosion resistant alloy gasket ring of the circular groove structure of processing (2), the material of described corrosion resistant alloy gasket ring (2) is identical with the material of internal lining pipe (4);
Step 5, corrosion resistant alloy gasket ring (2) are installed: the corrosion resistant alloy gasket ring (2) that machines in the step 4 is packed in the described annular groove;
Welding is fixing between step 6, corrosion resistant alloy gasket ring (2) and internal lining pipe (4): adopt welding equipment and under shielding gas atmosphere built-up welding is carried out in joint between corrosion resistant alloy gasket ring (2) and internal lining pipe (4), and corresponding formation fillet weld two (5), used scolder is welding consumables identical with the material of internal lining pipe (4) or that be complementary; Before the welding, when the wall thickness of internal lining pipe (4)>1mm, adopt machining equipment joint between corrosion resistant alloy gasket ring (2) and internal lining pipe (4) to process arc angle earlier, the degree of depth of described arc angle is no more than the thickness of corrosion resistant alloy gasket ring (2);
Interface seal welding between the sealing surface (8) of step 7, corrosion resistant alloy gasket ring (2) and flange plate (1): adopt welding equipment and under shielding gas atmosphere, the interface between corrosion resistant alloy gasket ring (2) and sealing surface (8) is welded, should make internal lining pipe (4) inside be under the inert gas shielding all the time in the welding process, used scolder is the welding consumables that all has good welds with outer tube (3) material and internal lining pipe (4) material, and corresponding formation fillet weld three (6);
Step 8, following process: adopt machining equipment to remove the reinforcement of weld seam two (5) and fillet weld three (6), the exterior edge face with sealing surface (8), corrosion resistant alloy gasket ring (2) and internal lining pipe (4) processes smooth smooth simultaneously.
7. be the machining manufacture of the bimetal composite flange pipe fitting of flange connection according to the described end of claim 6, it is characterized in that: the material of internal lining pipe described in the step 1 (4) is stainless steel, nickel-base alloy, Cuprum alloy, titanium alloy or aluminum alloy material; The material of described outer tube (3) is carbon steel, alloyed steel or Cu alloy material.
8. according to claim 6 or 7 described ends the machining manufacture of the bimetal composite flange pipe fitting of flange connection, it is characterized in that: when welding fixedly to the joint between flange plate (1) inner end and outer tube (3) outer wall described in the step 3, used welding equipment is arc welding welding machine or argon arc welding welding machine, and welding current is 100~180A; When built-up welding was carried out in the joint between corrosion resistant alloy gasket ring (2) and internal lining pipe (4), used welding equipment was arc welding welding machine or argon arc welding welding machine described in the step 6, and welding current is 30~100A; When described in the step 7 interface between corrosion resistant alloy gasket ring (2) and sealing surface (8) being welded, used welding equipment is arc welding welding machine or argon arc welding welding machine, and welding current is 100~180A.
9. be the machining manufacture of the bimetal composite flange pipe fitting of flange connection according to claim 6 or 7 described ends, it is characterized in that: material, the structure and measure-alike of the composite bimetal pipe that material, structure and the size of the pipe nipple of composite bimetal pipe described in the step 1 all be connected with need.
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