Anti-deformation tool for welding threaded connecting pipe of swirler of gas turbine

Abstract

A gas turbine swirler threaded connection pipe welding anti-deformation tool comprises a base, a swirler positioning plate is arranged on the base and fixed to the base through three bolts, the gas turbine swirler threaded connection pipe welding anti-deformation tool further comprises a semicircular cover plate, and a swirler is fixed to the base through the semicircular cover plate through bolts; two stand columns and an auxiliary stand column are further arranged on the base, positioning steps are arranged on the two stand columns, a clamping plate is arranged on the positioning steps, the clamping plate is formed by combining two halves, cross beams are connected to the upper ends of the stand columns and the upper end of the auxiliary stand column through bolts, and three positioning pin holes are formed in each cross beam. The cross beam is fixed on the stand columns and the auxiliary stand columns through three stand column nuts, a through hole is formed in the cross beam, and the connecting pipe is fixed between the two stand columns; and the connecting pipe penetrates through the cross beam and is fixed on the cross beam through a connecting pipe nut.

Description

Technical Field

[0001] The utility model relates to a cyclone pipe welding anti-deformation device. Background Art

[0002] Gas turbine is the full name of gas turbine engine. It is an internal combustion power machine that uses continuous flowing gas as the working fluid to drive the impeller rotor to rotate at high speed and convert the chemical energy of the fuel into useful work. It is a rotary impeller heat engine. As the heat-to-work conversion machine with the highest thermal efficiency in the world today, gas turbine is known as the "crown jewel of industry" in the machinery manufacturing industry. The F-class heavy-duty gas turbine cyclone pipe is relatively complex and large in size, requiring high welding quality.

[0003] The energy conversion method of gas turbine is the same as that of steam engine, which is to convert the chemical energy of fuel into electricity or power. The difference is that steam turbine expands the volume of steam to drive the steam turbine to do work. When the gas turbine is running, it does not need to heat steam as an intermediate medium, but directly passes the gas into the turbine to expand and do work. It will continuously inhale air from the atmosphere and compress it. The compressed air is sent to the combustion chamber, fully mixed with the injected fuel and burned to become high-temperature and high-pressure gas, which is then passed into the gas turbine to drive the turbine impeller rotor to rotate and expand to do work. The output power can be used as power or converted into electricity. Therefore, it is required that the components of the gas turbine combustion chamber can withstand extreme high temperature, high pressure, high speed for a long time and maintain the safe and stable operation of the whole machine. Higher operating parameters also significantly improve the work capacity of the equipment, so that the gas turbine has the characteristics of large unit power, fast starting speed, strong maneuverability, and high energy conversion rate. With the development of time, this technology has continued to mature, and finally has a wider application space, playing an indispensable and important role in the development of modern equipment.

[0004] The gas turbine cyclone is made of stainless steel, which is very easy to deform during welding. When welding the cyclone and the connecting pipe, a certain gap must be left between the two. If the connecting pipe is in a free state when welding on the cyclone, the inner cavity weld formation, dimensional accuracy, and position of the connecting pipe cannot be guaranteed after welding, and weld quality problems such as weld nodules, cracks, pores, and defects are very likely to occur. Summary of the invention

[0005] In order to solve the above problems, the purpose of the utility model is to provide a (F-class heavy-duty gas turbine) cyclone pipe welding anti-deformation device, which can be used to perform a single-sided welding and double-sided forming welding process.

[0006] The technical scheme of the utility model is a gas turbine swirler threaded pipe welding anti-deformation tooling, in particular, a F-class heavy-duty gas turbine swirler pipe welding anti-deformation device, comprising a base 1, the base 1 is provided with a swirler positioning plate 3, the swirler positioning plate 3 is fixed to the base 1 by three bolts 2, and also includes a semicircular cover plate 13, the semicircular cover plate 13 is fixed to the base 1 by bolts 12; the base 1 is also provided with two columns 5 and an auxiliary column 15, The two columns 5 are provided with positioning steps, and the positioning steps are provided with a clamping plate 4. The clamping plate 4 is composed of two halves and is connected by bolts 9. The upper ends of the columns 5 and the auxiliary columns 15 are provided with connecting beams 8. The beams 8 are provided with three positioning pin holes. The beams 8 are fixed to the columns 5 and the auxiliary columns 15 through three column nuts 6. The beams 8 are provided with a through hole to fix the connecting pipe 14 between the two columns 5; the connecting pipe 14 is passed through the beam and fixed to the beam 8 through the connecting pipe nut 7.

[0007] In addition, the cyclone positioning plate 3 is fixed to the bottom plate by two positioning pins 10 to prevent loosening.

[0008] Beneficial effects: F-class heavy-duty gas turbines carry pressures and temperatures far exceeding those of other types of steam turbines. The highest temperature exceeds 1,300 degrees Celsius, and the pressure reaches 18 atmospheres, which is equivalent to the water pressure at a depth of 180 meters on the seabed. The cyclone is located on the gas turbine casing and forms an ignition device with the burner. An F-class heavy-duty gas turbine is equipped with 24 sets of ignition devices. The welding process of the cyclone and the threaded pipe is a single-sided welding and double-sided forming process. During welding, the pipe is suspended and fixed by a welding anti-deformation device. A 2mm welding gap is set between the cyclone and the pipe to facilitate better forming of the inner cavity weld during welding. The anti-deformation device can better control welding deformation, weld quality and post-welding dimensional accuracy, effectively improve the sealing and service life of the ignition device, withstand higher pressure and temperature, and reduce the operation risk of the gas turbine unit. (F-class heavy-duty gas turbine) The threaded pipe of the cyclone is welded to the inner cone. During welding, the threaded pipe is suspended by the tooling, with a 2mm margin of space between the cyclone and the inner cavity. After welding, the weld of the inner cavity is consistent with the outer side, and the appearance quality of the two welds is also the same. Through this tooling, the results are obtained based on actual operations to ensure that the verticality of the threaded pipe and the cyclone is within 0.05, the height of the pipe sealing surface is controlled within 0.05, and the position of the threaded pipe is also within 0.05. The welding position of the threaded pipe has angular position requirements with the entire circle of holes on the inner cone bevel; for example, this tooling realizes an adjustable function, which can weld threaded pipes of different lengths, and can also add a power unit. During welding, the speed can be adjusted arbitrarily to improve the efficiency and quality of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the drawings.

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 For this utility model Figure 1 AA section view;

[0012] Figure 3 For this utility model Figure 2 BB cross-sectional view;

[0013] Figure 4 For this utility model Figure 3 CC cross-sectional view (looking down from below);

[0014] Figure 5 This is a cross-sectional view of the cyclone parts of the utility model ( Figure 6 AA profile);

[0015] Figure 6 for Figure 5 A top view of the pipe connection port 15 on the cyclone 11;

[0016] Figure 7 This is a side view of the cyclone parts after welding of the utility model;

[0017] Figure 8 for Figure 7 AA section view. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, the F-class heavy-duty gas turbine cyclone pipe welding anti-deformation device, the main structural part of the tooling is the base, the base 1 is provided with a cyclone positioning plate 3, the cyclone positioning plate 3 is fixed to the base 1 by three bolts 2, and is prevented from loosening by two positioning pins 10; it also includes a semicircular cover plate 13, the semicircular cover plate 13 fixes the cyclone 11 to the base 1 by bolts 12; the base 1 is also provided with two columns 5 and a column 15, the two columns 5 are provided with positioning steps, the positioning steps are provided with a clamping plate 4, the clamping plate 4 consists of two half The two columns 5 are combined, and the pipe 14 is fixed between the two columns 5 by bolts 9; the upper ends of the columns 5 and the auxiliary columns 15 are provided with cross beams 8, and the upper ends of the columns 5 and the auxiliary columns 15 are provided with three cross beams 8 connected to form a triangle by two columns 5 and one auxiliary column, and both ends of the cross beams 8 are provided with positioning pin holes, and the three cross beams 8 are fixed to the columns 5 and the auxiliary columns 15 by three column nuts 6, and the cross beam 8 connected between the two columns 5 is provided with a through hole, and the pipe 14 is passed through the cross beam and fixed to the cross beam 8 by pipe nuts 7. The auxiliary columns can support and position.

[0019] The assembly and processing steps are as follows:

[0020] S1. A cyclone positioning plate 3 is provided on the base 1. The cyclone positioning plate 3 is fixed to the base 1 by three bolts 2 and is prevented from loosening by two tightly fitting positioning pins 10.

[0021] S2. The base 1 is also provided with two columns 5 and an auxiliary column 15. The small ends of the three columns are tightly fitted with the pin holes on the base 1. After installation, the verticality requirements between the columns 5, the auxiliary columns 15 and the chassis 1 are guaranteed, and the three columns (two columns 5 and one auxiliary column) are of the same height and are spot-welded by electric welding to prevent them from loosening.

[0022] A crossbeam 8 is provided at the upper ends of S3, columns 5 and auxiliary columns 15, and three positioning pin holes are provided on the crossbeam 8. The center distance between the positioning pin holes on the crossbeam is consistent with the center distance between the three columns; a connecting pipe pin hole is also provided on a crossbeam between two columns, and the connecting pipe 14 is matched with the connecting pipe pin hole on the crossbeam, and is fixed to the crossbeam between the two columns by a connecting pipe nut 7.

[0023] S4. The inner hole at the small end of the cyclone 11 is clearance-matched with the outer circle of the cyclone positioning plate 3. A semicircular cover plate 13 is provided on the cyclone 11, and the semicircular cover plate 13 fixes the cyclone 11 on the base 1 through bolts 12.

[0024] S5, the column 5 is also provided with a positioning step, the positioning step is provided with a clamping plate 4, the clamping plate 4 is composed of two halves, the clamping plate 4 is provided with three through holes, the center distance between the three through holes is consistent with the column 5, the connecting pipe 14, and the connecting pipe 14 is fixed between the two columns 5 by bolts 9; there is a gap between the two clamping plates 4 to ensure that the connecting pipe 14 can be more effectively fixed when the bolts 9 are tightened, so as to prevent the connecting pipe 14 from bending and deforming at the lower end under the welding stress during welding.

[0025] S6, the connecting pipe 14 is connected to the connecting pipe interface 15 on the cyclone 11 ( Figure 5-Figure 6 ) are concentric, and the welding process of single-sided welding and double-sided forming is adopted for the welding of the cyclone 11 and the connecting pipe 14. During welding, the welding positioner clamps the base 1 and rotates according to the parameter requirements. The welding groove of the cyclone 11 and the connecting pipe 14 is located in the center of the base. The connecting pipe 14 is suspended and fixed by a welding anti-deformation device. A 2mm welding gap is set between the cyclone 11 and the connecting pipe 14 to facilitate better forming of the inner cavity weld during welding; the use of this welding anti-deformation device can well control the axial size of the connecting pipe during welding and the radial deformation of the connecting pipe.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A gas turbine cyclone threaded pipe welding anti-deformation tool, characterized in that: It includes a base, on which a cyclone positioning plate is provided, which is fixed to the base by three bolts, and also includes a semicircular cover plate, which fixes the cyclone to the base by bolts; the base is also provided with two columns and an auxiliary column, the two columns are provided with positioning steps, the positioning step is provided with a clamping plate, the clamping plate is composed of two halves, and the upper ends of the columns and the auxiliary columns are provided with a connecting beam, and the beam is provided with three positioning pin holes, and the beam is fixed to the column and the auxiliary column by three column nuts, and the beam is provided with a through hole to fix the pipe between the two columns; the pipe passes through the beam and is fixed to the beam by the pipe nut.

2. The gas turbine swirler threaded pipe welding anti-deformation tool according to claim 1 is characterized in that: The cyclone positioning plate is also fixed to the bottom plate through two positioning pins.

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