CN207999803U - Nuclear island evaporator conical shell forging - Google Patents

Abstract

The utility model discloses a kind of nuclear island evaporator conical shell forging, it is made of lower tube section, Taper Pipe section and upper pipeline section, and in the both ends of Taper Pipe section, lower tube section and upper pipeline section are circular tube structure for lower tube section and upper pipeline section solid forging;The internal diameter of lower tube section is 2R₁, the outer diameter of lower tube section is 2R₂, the corresponding finished product conical shell internal diameter of lower tube section is 2R₀₁, R₁=(95%-97%)R₀₁, R₂=(1.15-1.16)R₀₁;The internal diameter and outer diameter of upper pipeline section are respectively 2R₃And 2R₄, the internal diameter and outer diameter of the corresponding finished product conical shell of upper pipeline section are respectively 2R₀₃And 2R₀₄, R₃=(95%-97%)R₀₃, R4=(1.03-1.05)R₀₄;The height of lower tube section and Taper Pipe section and be h₁, finished product conical shell height h corresponding with lower tube section and Taper Pipe section₀₁, h₁=(1.02-1.04)h₀₁;The height of upper pipeline section is h₂, finished product conical shell height corresponding with upper pipeline section is h₀₂, h₂=2h₀₂.Not only there is uniform metal microstructure and mechanical property, but also there is the pre- allowance of rational sample and chipping allowance, not only there is reliable forging safety in utilization, but also there is good economy.

Description

Nuclear island evaporator conical shell forging

Technical field

The utility model is related to nuclear power nuclear island steam generator large-sized structural parts more particularly to steam generator shell portions The conical shell forging structure divided.

Background technology

Steam generator is one of four big components of pressurized-water reactor nuclear power plant, is the most key capital equipment of nuclear power station.It steams Vapour generator is connected with reactor pressure vessel, is the maximum component of pressure-bearing, plays the work of sealing and isolation one, secondary circuit cooling With and primary Ioops side coolant flow through tube bank it is front and back collect chamber, it not only directly affects the power and efficiency of nuclear power station, And when carrying out heat exchange, also plays a part of obstructing radioactivity catalyst carrier, nuclear plant safety be played vital Effect.

Steam generator tube body is mainly made of the upper, lower tube shell and cone shell of upper and lower end socket and tubular, this A little components belong to large thick-wall shape Forging.Built-in steam-water separation equipment and inversion are provided in the outer housing of steam generator U-tube bundle, cone shell is located at steam-water separation equipment and the adjacent corresponding position of inverted U-shape pipe, plays connection steam generator The effect of upper and lower cylinder, belongs to large volume, and big cross section, complex-curved core level-one forging it is very big to forge difficulty, it is necessary to unite Each production link such as smelting, forging and heat treatment is raised, to obtain uniform microstructure and mechanical property, and then reaches " control The purpose of type " and " control property ", to improve reliability and the safety of forging.

Evaporator conical shell is the important component of nuclear power nuclear island steam generator tube body, existing steam generator conical shell cylinder Polylith splicing manufacture is mostly carried out by the method for welding, this method for splicing manufacture by welding comes with some shortcomings: Complete metal streamline cannot always be formed by the structure that welding is spliced first, since nuclear steam generator is chronically at In the severe running environment of high temperature and pressure, and bear alternate load and pipeline vortex be formed by pressure jump, easily cause to answer Power is unevenly distributed and stress concentration, easy tos produce fatigue, creep and damage.And the method for such welding manufacture, complex process, Welding interval is long, and complex stress area quality stability is poor, and it is low to directly contribute yield rate, and manufacturing cost is high.Furthermore in order to ensure core The quality of grade forging, it is necessary to which microstructure of metals and mechanical property to various processes in core grade forging production process carry out whole Monitoring and evaluation, it is therefore necessary to being reserved with enough sample samples in the rational position of forging, to accurately reflect forging The uniformity coefficient of internal soundness, chemical composition and mechanical property ensures that sample tests representative, accuracy;Must also simultaneously It must consider that there is the cost that rationally keeps sample.Since conical shell forging process for fuel material performance requirement is high, material is with the high spy of valence of fine quality Point, for conical shell forging in finished product machining process, excessive chipping allowance can cause a large amount of cutting metal to waste, therefore not conform to The pre- allowance of sample and finishing chipping allowance of reason not only cause the waste of high-performance high cost metal, but also also increase processing Cost of manufacture.

Utility model content

For above shortcomings described in the prior art, the technical problem to be solved by the utility model is to provide one kind Steam generator conical shell forging not only has uniform metal microstructure and mechanical property, but also pre- with rational sample Allowance and chipping allowance, on the basis of ensuring forging safe and reliable property, there is good economy.

In order to solve the above-mentioned technical problem, the nuclear island evaporator conical shell forging of the utility model, including forging body, should Forging body is made of lower tube section, Taper Pipe section and upper pipeline section, the lower tube section and upper pipeline section solid forging in the both ends of Taper Pipe section, Lower tube section and upper pipeline section are circular tube structure;The internal diameter of the lower tube section is 2R₁, the outer diameter of lower tube section is 2R₂, lower tube section is corresponding Finished product conical shell internal diameter is 2R₀₁, R₁=(95%-97%)R₀₁, R₂=(1.15-1.16)R₀₁;The internal diameter and outer diameter of upper pipeline section are respectively 2R₃ And 2R₄, the internal diameter and outer diameter of the corresponding finished product conical shell of upper pipeline section are respectively 2R₀₃And 2R₀₄, R₃=(95%-97%)R₀₃, R4=(1.03- 1.05)R₀₄;The height of lower tube section and Taper Pipe section and be h₁, finished product conical shell height h corresponding with lower tube section and Taper Pipe section₀₁, h₁= (1.02-1.04)h₀₁;The height of upper pipeline section is h₂, finished product conical shell height corresponding with upper pipeline section is h₀₂, h₂=2h₀₂。

In above-mentioned evaporator conical shell forging, since its lower tube section, Taper Pipe section and upper pipeline section are made of solid forging, So that the metal structure uniformity of forging, metal streamline is smooth coherent, ensure that being greatly improved for conical shell product mechanical property, The high temperature and pressure and time dependent loading and vapor vortex that steam generator can more be born are formed by bad working environments, are conducive to cone shell The raising of the homogenization and safety in operation of working stress;And solid forging has not only further refined metal structure, but also be conducive to The accurate forming of each barrel shell section.Again due to twice that the height of upper pipeline section is corresponding finished product pipeline section height, in upper pipeline section mouth End forms the sample sample section of reasonable length, which not only contributes to accurately reflect conical shell forging along pipe end circumferential direction Internal soundness, and enough pre- allowances can be used in producing conical shell the multiple sample detection of overall process, so as to standard Really reflection forging each technical process chemical composition, microscopic structure and mechanical property, to ensure the absolute of forging quality Securely and reliably.Due also to the upper lower tube section internal-and external diameter of conical shell forging with respect to its finished product conical shell caliber there are rational final shaping unit essence Allowance, this not only ensure that finished product conical shell product shape size and suface processing quality, but also with the most rationally and the most most The cutting output of low amounts reduces the waste of a large amount of metals for high-performance large-scale forging as conical shell, effectively reduces processing Cost of manufacture.

The further embodiment of the utility model, the Taper Pipe section are in conical tube structure, lower tube section, Taper Pipe section and upper tube The centerline of section is on same straight line.Conducive to ensure that the accurate of conical shell finished product morpheme size.

Preferred embodiments of the present invention, the upper end of the upper pipeline section are equipped with sample and intercept section.The position sample It more can accurately evaluate the internal soundness of forging.

Preferred embodiments of the present invention, the forging body are formed by carbon manganese low-alloy steel solid forging.It can Meet the requirement and performance requirement of nuclear island product.

Description of the drawings

The utility model steam generator conical shell forging is described further with reference to the accompanying drawings and detailed description.

Fig. 1 is the cross-section structure view of nuclear island evaporator finished product conical shell;

Fig. 2 is a kind of structural schematic diagram of specific implementation mode of the utility model steam generator conical shell forging.

In figure, 1-lower tube section, 2-Taper Pipe sections, 3-finished product conical shells, 4-upper pipeline sections, 5-samples intercept section.

Specific implementation mode

Evaporator finished product conical shell shown in Fig. 1, the end suitable for reading of the finished product conical shell 3 are connected with evaporator upper shell, under Mouth end is connected with evaporator lower shell, since the upper shell of evaporator and the caliber size of lower shell are not of uniform size, finished product cone Shell 3 realizes the transition and linkage of upper shell and lower shell;It is additionally provided with attachment installation base in the lower end outside of finished product conical shell 3. As shown in Fig. 2, the lower mouth end internal diameter of evaporator finished product conical shell 3 is 2R₀₁=2580 millimeters, the internal diameter 2R at end suitable for reading₀₃=3018 millis Rice, end outer diameter suitable for reading are 2R₀₄=3360 millimeters, the total a height of h of Taper Pipe₀₁+h₀₂=1580 millimeters.

Nuclear island evaporator conical shell forging as shown in Figure 2, the forging body is by connected 1 Taper Pipe section 2 of lower tube section and upper tube Section 4 is constituted, and forging body is formed with carbon manganese low-alloy steel solid forging, and lower tube section 1 and upper pipeline section 4 distinguish solid forging in cone The upper/lower terminal of pipeline section 2.Lower tube section 1 and upper pipeline section 4 are circular tube structure, and Taper Pipe section 2 is then conical tube structure, in Taper Pipe section 2 The bore at lower mouth end is corresponding with the caliber of upper pipeline section 4 and lower tube section 1 respectively;The center of lower tube section 1, upper pipeline section 4 and Taper Pipe section 2 Line is on same straight line.

The internal diameter of lower tube section 1 is 2R₁, the outer diameter of lower tube section 1 is 2R₂, which is 2R₀₁, then R₁=(95%-97%)R₀₁.In view of being equipped with installation base, therefore R on the outside of finished product conical shell₂=(1.15-1.16)R₀₁.Down tube The total height of section 1 and Taper Pipe section 2 is h₁, the height h corresponding with lower tube section 1 and Taper Pipe section 2 of finished product conical shell 3₀₁, then h₁=(1.02- 1.04)h₀₁。

The internal diameter and outer diameter of upper pipeline section 4 are respectively 2R₃And 2R₄, the internal diameter and outer diameter of finished product conical shell corresponding with upper pipeline section 44 Respectively 2R₀₃And 2R₀₄, then R₃=(95%-97%)R₀₃, R₄=(1.03-1.05)R₀₄;The height of upper pipeline section 4 is h₂, upper pipeline section 4 is right The finished product conical shell 3 answered manages a height of h₀₂, then h₂=2h₀₂, there are samples to intercept section 5 at the mouth end of upper pipeline section 4, so as at forging and heat Interception sample sample is detected and evaluates in multiple processes such as reason.

Claims (4)

1. a kind of nuclear island evaporator conical shell forging, including forging body, the forging body is by lower tube section(1), Taper Pipe section(2)With Upper pipeline section(4)It constitutes, it is characterised in that:The lower tube section(1)With upper pipeline section(4)Solid forging is in Taper Pipe section(2)Both ends, under Pipeline section(1)With upper pipeline section(4)It is circular tube structure;The lower tube section(1)Internal diameter be 2R₁, lower tube section(1)Outer diameter be 2R₂, under Pipeline section(1)Corresponding finished product conical shell(3)Internal diameter is 2R₀₁, R₁=(95%-97%)R₀₁, R₂=(1.15-1.16)R₀₁;Upper pipeline section(4)'s Internal diameter and outer diameter are respectively 2R₃And 2R₄, upper pipeline section(4)Corresponding finished product conical shell(3)Internal diameter and outer diameter be respectively 2R₀₃With 2R₀₄, R₃=(95%-97%)R₀₃, R4=(1.03-1.05)R₀₄;Lower tube section(1)With Taper Pipe section(2)Height and be h₁, finished product conical shell (3)With lower tube section(1)With Taper Pipe section(2)Corresponding height h₀₁, h₁=(1.02-1.04)h₀₁;Upper pipeline section(4)Height be h₂, at Product conical shell(3)With upper pipeline section(4)Corresponding height is h₀₂, h₂=2h₀₂。

2. nuclear island evaporator conical shell forging according to claim 1, it is characterised in that:The Taper Pipe section(2)In conical tube Structure, lower tube section(1), Taper Pipe section(2)With upper pipeline section(4)Centerline on same straight line.

3. nuclear island evaporator conical shell forging according to claim 1, it is characterised in that:The upper pipeline section(4)Upper end Section is intercepted equipped with sample(5).

4. nuclear island evaporator conical shell forging according to claim 1, it is characterised in that:The forging body is by the low conjunction of carbon manganese Golden steel solid forging forms.