CN113358486A - Creep testing device based on power station steam turbine elbow and testing method thereof - Google Patents
Creep testing device based on power station steam turbine elbow and testing method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of metal alloy casting application, and particularly discloses a creep testing device based on a power station steam turbine elbow. The creep testing device and the testing method based on the power station steam turbine elbow have the beneficial effects that: 1. the integral structure of the device is reasonable in design, so that real high-temperature creep simulation test can be conveniently carried out on the bent pipe, the service life prediction and analysis can be completed, and the safety of the operation of the power station steam turbine can be improved; 2. the auxiliary test analysis treatment can be carried out on the production and the manufacture of the bent pipe.
Description
Technical Field
The invention belongs to the technical field of metal alloy casting application, and particularly relates to a creep deformation testing device and a creep deformation testing method based on a power station steam turbine elbow.
Background
At the end of 2016, the proportion of the thermal power generation capacity of China is about 70%, the proportion of the total installed capacity of thermal power is 60%, and the number of the supercritical units 101 reaches the end of 7 months in the year; by the end of 2015, the installed capacity of natural gas power generation in China reaches 6637 ten thousand kilowatts; the natural gas power generation rate will reach 33% in 2016, exceeding the coal power rate for the first time (32% predicted). The American shale gas revolution obtains new stage achievements, new energy is developed beyond the routine, the local proportion is too large, the whole power generation and installation machine is excessive, the power load is slowly increased, the supercritical thermal power generating unit participates in deep peak regulation and schedules, and safety and flexibility are emphasized while high efficiency and cleanness of thermal power and gas power are emphasized.
One of the major special projects of planning gas turbines in the technical field of advanced energy of the national ministry of science and technology 863 is the official project of R0110 heavy-duty gas turbine design and development in 2002-10 months, and through 10 years of efforts, breakthrough progress has been made. 29 th 11 th 2013, the R0110 heavy-duty gas turbine completes 168 hours of combined cycle test operation assessment in Zhonghai oil Shenzhen power Limited company, and when the operation is 10 th 29 th, the combined cycle test gas turbine operates 20 minutes in 209 hours in an accumulated mode, and the steam turbine operates 57 minutes in an accumulated mode, and all performance indexes of the unit completely meet design requirements.
The performance of R0110 heavy-duty gas turbines independently developed in China can only be calculated according to E level + (the highest temperature is 1200-1300 ℃), 1 generation and a half (E level- > F level- > H level) of laggard H-level combustion engines, the highest H level can reach more than 1600 ℃, and F-level combustion engines are introduced for many years, but key technologies such as hot end components and control systems are still not mastered, and the R0110 heavy-duty gas turbines are not competitive with other foreign combustion engines.
In the aspects of design, materials, manufacture, process and the like of domestic heavy-duty combustion engines, particularly combustion engines with the temperature exceeding 1400 ℃ such as F-level and H-level have little difference with international advanced level, and the damage and failure mechanism of high-temperature structures and components in some design processes are not completely mastered in theory, and the design method cannot be used for guiding the design of heavy-duty combustion engine components.
Since the first 23 heavy-duty gas turbine combined cycle power plant international bidding projects in China started in 2003, class F gas turbines have been in operation experience for over 10 years domestically. The difference of unit design and operation conditions can cause accidents and unplanned shutdown of the gas turbine, for example, in recent years, the gas turbine is used in the south of China to participate in peak shaving operation of a power grid, the accident rate and the service life loss greatly exceed the design values, and meanwhile, due to the peak shaving and daily start-stop operation, cracks are initiated and developed due to high-temperature low-cycle fatigue and creep high temperature in a complex environment, and finally, accidents are formed.
The main reason for the problems of the high-temperature components of the power station is that the fatigue creep damage mechanism of the components such as the blades, the rotors and the bent pipes under the multi-axis load is yet to be further researched, the composite fatigue life model verification test is not yet carried out, and meanwhile, the structural strength, the life prediction method and the analysis of the key high-temperature alloy under the multi-field load/environment action are still yet to be carried out.
Therefore, based on the problems, the invention provides a creep testing device based on a bent pipe of a steam turbine of a power station and a testing method thereof.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a creep testing device and a creep testing method based on a bent pipe of a power station steam turbine, which have reasonable overall structure design, are convenient for carrying out real high-temperature creep simulation test on the bent pipe, complete service life prediction and analysis and improve the operation safety of the power station steam turbine.
The technical scheme is as follows: the invention provides a creep testing device based on a power station steam turbine elbow, which consists of a horizontal frame fixing component and a high-temperature heating component matched with the horizontal frame fixing component; the horizontal frame fixing assembly comprises a fixing bottom plate, a first vertical supporting plate and a second vertical supporting plate which are arranged on end faces of two ends of the fixing bottom plate, a first air cylinder mounting seat and a second air cylinder mounting seat which are respectively arranged on side walls of opposite surfaces of the first vertical supporting plate and the second vertical supporting plate, a first air cylinder and a second air cylinder which are respectively arranged on the first air cylinder mounting seat and the second air cylinder mounting seat, a first connecting plate and a second connecting plate which are respectively arranged at one end of the first air cylinder and one end of the second air cylinder, and a first U-shaped supporting seat and a second U-shaped supporting seat which are respectively arranged on one surface of the first connecting plate and one surface of the second connecting plate; the high-temperature heating assembly comprises a plurality of high-temperature flexible thermocouple wires, and a circumferential strain gauge and an axial strain gauge which are respectively arranged on the high-temperature flexible thermocouple wires, wherein the circumferential strain gauge and the axial strain gauge are integrally arranged on one surface of the high-temperature flexible thermocouple wires; the two ends of the elbow to be tested are clamped into the first U-shaped supporting seat and the second U-shaped supporting seat respectively, and the high-temperature flexible thermocouple wires are uniformly arranged on the outer wall of the elbow to be tested.
This technical scheme, creep testing arrangement based on power station steam turbine return bend still includes that the symmetry sets up at the first vertical limiting plate of PMKD both sides terminal surface, the limiting plate is erect to the second, and set up respectively in first vertical limiting plate, the horizontal waist of the first vertical limiting plate of limiting plate in the limiting plate is described to the second and is described logical groove, the horizontal waist of the limiting plate is described to the second and is described logical groove, and set up respectively at first connecting plate, the first connecting plate through-hole in the second connecting plate, the second connecting plate through-hole, and both ends run through first connecting plate through-hole respectively, the second connecting plate through-hole just stands the horizontal waist of the first vertical limiting plate and is described logical groove, the horizontal waist of the limiting plate is described to the second and is described logical first horizontal gag lever post, and set up respectively on first horizontal gag lever post, two sets of first stop nut, two sets of second stop nut on first horizontal gag lever post.
This technical scheme, creep testing arrangement based on power station steam turbine return bend still includes first U-shaped supporting seat screw, the second U-shaped supporting seat screw that sets up respectively in first U-shaped supporting seat, second U-shaped supporting seat both sides, and runs through first U-shaped supporting seat screw, the first lock bolt of second U-shaped supporting seat screw, second lock bolt respectively, and set up first lock nut, the second lock nut on first lock bolt, second lock bolt respectively.
According to the technical scheme, the creep testing device based on the power station steam turbine elbow further comprises a first flexible cushion block and a second flexible cushion block which are respectively arranged at one ends of the first locking bolt and the second locking bolt.
This technical scheme, creep testing arrangement based on power station steam turbine return bend still includes that the symmetry sets up at PMKD both sides terminal surface and lies in the first vertical backup pad, the second erects first vertical backup pad, the vertical backup pad between the limiting plate, and sets up respectively in first vertical backup pad, the first vertical backup pad waist shape of second vertical backup pad one end leads to groove, the groove is led to the second vertical backup pad waist shape, and both ends run through respectively first vertical backup pad waist shape lead to groove, the supplementary clamping screw who leads to the groove is led to the second vertical backup pad waist shape, and set up the supplementary clamping screw lock nut at supplementary clamping screw both ends.
This technical scheme, creep testing arrangement based on power station steam turbine return bend still includes the spacing fixture block of arc that cooperatees and use with supplementary clamping screw, and set up in the spacing fixture block of arc and the spacing fixture block through-hole of arc that cooperatees and use with supplementary clamping screw, and set up the spill return bend spacing groove in the spacing fixture block one side of arc, wherein, the spacing fixture block through-hole of arc is run through at supplementary clamping screw's both ends.
The invention also provides a test method of the creep test device based on the power station steam turbine elbow, which comprises the following steps of 1, respectively clamping two ends of the elbow to be tested into a first U-shaped supporting seat and a second U-shaped supporting seat, respectively starting a first air cylinder and a second air cylinder, and clamping the elbow to be tested when the first air cylinder and the second air cylinder move relatively. And 2, arranging the high-temperature flexible thermocouple wire, the annular strain gauge and the axial strain gauge on the outer wall of the elbow to be tested according to the actual installation requirement. And 3, respectively rotating the first locking bolt and the second locking bolt, locking the first locking bolt and the second locking bolt through the first locking nut and the second locking nut when the first locking bolt and the second locking bolt are rotated to proper positions, and enabling the first flexible cushion block and the second flexible cushion block to respectively contact with the two ends of the elbow to be tested to perform clamping action. And 4, clamping the concave elbow limiting groove on one surface of the arc-shaped limiting fixture block into the bending part of the elbow to be tested, locking and fixing the concave elbow limiting groove through the arc-shaped limiting fixture block through hole, the waist-shaped through groove of the first vertical support plate and the waist-shaped through groove of the second vertical support plate by using the auxiliary fixing screw and the auxiliary fixing screw locking nut, starting the high-temperature flexible thermocouple wire, respectively connecting the high-temperature flexible thermocouple wire, the annular strain gauge and the axial strain gauge with a test simulator, and receiving and displaying data information of the high-temperature flexible thermocouple wire, the annular strain gauge and the axial strain gauge by the test simulator.
According to the technical scheme, before clamping the elbow to be tested in the step 1, the first connecting plate through hole, the second connecting plate through hole, the first vertical limiting plate, the second vertical limiting plate, the first vertical limiting plate transverse waist-shaped through groove, the second vertical limiting plate transverse waist-shaped through groove, the first transverse limiting rod, the two groups of first limiting nuts and the two groups of second limiting nuts are used for horizontally supporting and limiting the first connecting plate and the second connecting plate respectively.
Compared with the prior art, the creep testing device and the creep testing method based on the power station steam turbine elbow have the beneficial effects that: 1. the integral structure of the device is reasonable in design, so that real high-temperature creep simulation test can be conveniently carried out on the bent pipe, the service life prediction and analysis can be completed, and the safety of the operation of the power station steam turbine can be improved; 2. the auxiliary test analysis treatment can be carried out on the production and the manufacture of the bent pipe.
Drawings
FIG. 1 is a schematic view of a portion of the creep testing apparatus of the present invention based on a bent pipe of a steam turbine of a power station;
FIG. 2 is a schematic top view of a portion of the creep testing apparatus of the present invention based on bent tubes of a steam turbine of a power plant;
FIG. 3 is a schematic top view structure diagram of an arc-shaped limiting fixture block, a concave elbow limiting groove, an arc-shaped limiting fixture block through hole, a first vertical support plate waist-shaped through groove, a second vertical support plate waist-shaped through groove, an auxiliary fixing screw locking nut and the like of the creep testing device based on the power station steam turbine elbow of the invention;
FIG. 4 is a schematic side view of an arc-shaped limiting fixture block, a concave elbow limiting groove and an arc-shaped limiting fixture block through hole of the creep testing device based on the elbow of the power station steam turbine, disclosed by the invention;
FIG. 5 is a schematic side view of the structure of a bent pipe to be tested, a high-temperature flexible thermocouple wire, a circumferential strain gauge and an axial strain gauge of the creep testing device based on the bent pipe of the power station turbine according to the present invention;
FIG. 6 is a vertical structure diagram of a test of a bent pipe to be tested and a high-temperature flexible thermocouple wire of the creep test device based on the bent pipe of the steam turbine of the power station.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments.
Example one
The creep testing device based on the bent pipe of the steam turbine of the power station as shown in the figures 1, 2, 3, 4, 5 and 6 consists of a horizontal frame fixing component and a high-temperature heating component matched with the horizontal frame fixing component; the horizontal frame fixing assembly comprises a fixing bottom plate 1, a first vertical supporting plate 2 and a second vertical supporting plate 3 which are arranged on the end faces of two ends of the fixing bottom plate 1, a first air cylinder mounting seat 4 and a second air cylinder mounting seat 5 which are respectively arranged on the side walls of the opposite surfaces of the first vertical supporting plate 2 and the second vertical supporting plate 3, a first air cylinder 6 and a second air cylinder 7 which are respectively arranged on the first air cylinder mounting seat 4 and the second air cylinder mounting seat 5, a first connecting plate 8 and a second connecting plate 9 which are respectively arranged at one end of the first air cylinder 6 and one end of the second air cylinder 7, and a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11 which are respectively arranged on one surface of the first connecting plate 8 and one surface of the second connecting plate 9; the high-temperature heating assembly comprises a plurality of high-temperature flexible thermocouple wires 39, and a circumferential strain gauge 40 and an axial strain gauge 19 which are respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the circumferential strain gauge 40 and the axial strain gauge 19 are integrally arranged on one surface of the high-temperature flexible thermocouple wires 39; the two ends of the elbow to be tested are respectively clamped into the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, and the high-temperature flexible thermocouple wires 39 are uniformly arranged on the outer wall of the elbow to be tested.
Example two
The creep testing device based on the bent pipe of the steam turbine of the power station as shown in the figures 1, 2, 3, 4, 5 and 6 consists of a horizontal frame fixing component and a high-temperature heating component matched with the horizontal frame fixing component; the horizontal frame fixing assembly comprises a fixing bottom plate 1, a first vertical supporting plate 2 and a second vertical supporting plate 3 which are arranged on the end faces of two ends of the fixing bottom plate 1, a first air cylinder mounting seat 4 and a second air cylinder mounting seat 5 which are respectively arranged on the side walls of the opposite surfaces of the first vertical supporting plate 2 and the second vertical supporting plate 3, a first air cylinder 6 and a second air cylinder 7 which are respectively arranged on the first air cylinder mounting seat 4 and the second air cylinder mounting seat 5, a first connecting plate 8 and a second connecting plate 9 which are respectively arranged at one end of the first air cylinder 6 and one end of the second air cylinder 7, and a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11 which are respectively arranged on one surface of the first connecting plate 8 and one surface of the second connecting plate 9; the high-temperature heating assembly comprises a plurality of high-temperature flexible thermocouple wires 39, and a circumferential strain gauge 40 and an axial strain gauge 19 which are respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the circumferential strain gauge 40 and the axial strain gauge 19 are integrally arranged on one surface of the high-temperature flexible thermocouple wires 39; two ends of a bent pipe to be tested are respectively clamped in the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, high-temperature flexible thermocouple wires 39 are uniformly arranged on the outer wall of the bent pipe to be tested, first vertical limiting plates 23 and second vertical limiting plates 24 which are symmetrically arranged on the end surfaces of two sides of the fixed base plate 1, a first vertical limiting plate transverse waist-shaped through groove 25 and a second vertical limiting plate transverse waist-shaped through groove 26 which are respectively arranged in the first vertical limiting plate 23 and the second vertical limiting plate 24, a first connecting plate through hole 21 and a second connecting plate through hole 22 which are respectively arranged in the first connecting plate 8 and the second connecting plate 9, and a first transverse limiting rod 27 and a first transverse limiting rod 28, two ends of which respectively penetrate through the first connecting plate through hole 21 and the second connecting plate through hole 22 and protrude out of the first vertical limiting plate transverse waist-shaped through groove 25 and the second vertical limiting plate transverse waist-shaped through groove 26, and a first transverse limiting rod 27 and a first transverse limiting rod 28 which are respectively arranged on the first transverse limiting rod 27, the second transverse limiting rod 27, Two groups of first limiting nuts 29 and two groups of second limiting nuts 30 on the first transverse limiting rod 28.
EXAMPLE III
The creep testing device based on the bent pipe of the steam turbine of the power station as shown in the figures 1, 2, 3, 4, 5 and 6 consists of a horizontal frame fixing component and a high-temperature heating component matched with the horizontal frame fixing component; the horizontal frame fixing assembly comprises a fixing bottom plate 1, a first vertical supporting plate 2 and a second vertical supporting plate 3 which are arranged on the end faces of two ends of the fixing bottom plate 1, a first air cylinder mounting seat 4 and a second air cylinder mounting seat 5 which are respectively arranged on the side walls of the opposite surfaces of the first vertical supporting plate 2 and the second vertical supporting plate 3, a first air cylinder 6 and a second air cylinder 7 which are respectively arranged on the first air cylinder mounting seat 4 and the second air cylinder mounting seat 5, a first connecting plate 8 and a second connecting plate 9 which are respectively arranged at one end of the first air cylinder 6 and one end of the second air cylinder 7, and a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11 which are respectively arranged on one surface of the first connecting plate 8 and one surface of the second connecting plate 9; the high-temperature heating assembly comprises a plurality of high-temperature flexible thermocouple wires 39, and a circumferential strain gauge 40 and an axial strain gauge 19 which are respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the circumferential strain gauge 40 and the axial strain gauge 19 are integrally arranged on one surface of the high-temperature flexible thermocouple wires 39; two ends of a bent pipe to be tested are respectively clamped in the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, high-temperature flexible thermocouple wires 39 are uniformly arranged on the outer wall of the bent pipe to be tested, first vertical limiting plates 23 and second vertical limiting plates 24 which are symmetrically arranged on the end surfaces of two sides of the fixed base plate 1, a first vertical limiting plate transverse waist-shaped through groove 25 and a second vertical limiting plate transverse waist-shaped through groove 26 which are respectively arranged in the first vertical limiting plate 23 and the second vertical limiting plate 24, a first connecting plate through hole 21 and a second connecting plate through hole 22 which are respectively arranged in the first connecting plate 8 and the second connecting plate 9, and a first transverse limiting rod 27 and a first transverse limiting rod 28, two ends of which respectively penetrate through the first connecting plate through hole 21 and the second connecting plate through hole 22 and protrude out of the first vertical limiting plate transverse waist-shaped through groove 25 and the second vertical limiting plate transverse waist-shaped through groove 26, and a first transverse limiting rod 27 and a first transverse limiting rod 28 which are respectively arranged on the first transverse limiting rod 27, the second transverse limiting rod 27, Two sets of first limit nuts 29 and two sets of second limit nuts 30 on the first transverse limiting rod 28, a first U-shaped support seat screw hole 31 and a second U-shaped support seat screw hole 32 which are respectively arranged in two sides of the first U-shaped support seat 10 and the second U-shaped support seat 11, a first locking bolt 33 and a second locking bolt 34 which respectively penetrate through the first U-shaped support seat screw hole 31 and the second U-shaped support seat screw hole 32, and a first locking nut 37 and a second locking nut 38 which are respectively arranged on the first locking bolt 33 and the second locking bolt 34.
Example four
The creep testing device based on the bent pipe of the steam turbine of the power station as shown in the figures 1, 2, 3, 4, 5 and 6 consists of a horizontal frame fixing component and a high-temperature heating component matched with the horizontal frame fixing component; the horizontal frame fixing assembly comprises a fixing bottom plate 1, a first vertical supporting plate 2 and a second vertical supporting plate 3 which are arranged on the end faces of two ends of the fixing bottom plate 1, a first air cylinder mounting seat 4 and a second air cylinder mounting seat 5 which are respectively arranged on the side walls of the opposite surfaces of the first vertical supporting plate 2 and the second vertical supporting plate 3, a first air cylinder 6 and a second air cylinder 7 which are respectively arranged on the first air cylinder mounting seat 4 and the second air cylinder mounting seat 5, a first connecting plate 8 and a second connecting plate 9 which are respectively arranged at one end of the first air cylinder 6 and one end of the second air cylinder 7, and a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11 which are respectively arranged on one surface of the first connecting plate 8 and one surface of the second connecting plate 9; the high-temperature heating assembly comprises a plurality of high-temperature flexible thermocouple wires 39, and a circumferential strain gauge 40 and an axial strain gauge 19 which are respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the circumferential strain gauge 40 and the axial strain gauge 19 are integrally arranged on one surface of the high-temperature flexible thermocouple wires 39; two ends of a bent pipe to be tested are respectively clamped in the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, high-temperature flexible thermocouple wires 39 are uniformly arranged on the outer wall of the bent pipe to be tested, first vertical limiting plates 23 and second vertical limiting plates 24 which are symmetrically arranged on the end surfaces of two sides of the fixed base plate 1, a first vertical limiting plate transverse waist-shaped through groove 25 and a second vertical limiting plate transverse waist-shaped through groove 26 which are respectively arranged in the first vertical limiting plate 23 and the second vertical limiting plate 24, a first connecting plate through hole 21 and a second connecting plate through hole 22 which are respectively arranged in the first connecting plate 8 and the second connecting plate 9, and a first transverse limiting rod 27 and a first transverse limiting rod 28, two ends of which respectively penetrate through the first connecting plate through hole 21 and the second connecting plate through hole 22 and protrude out of the first vertical limiting plate transverse waist-shaped through groove 25 and the second vertical limiting plate transverse waist-shaped through groove 26, and a first transverse limiting rod 27 and a first transverse limiting rod 28 which are respectively arranged on the first transverse limiting rod 27, the second transverse limiting rod 27, Two sets of first limit nuts 29 and two sets of second limit nuts 30 on the first transverse limiting rod 28, and first U-shaped supporting seat screw holes 31 and second U-shaped supporting seat screw holes 32 respectively arranged in two sides of the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, and first locking bolts 33 and second locking bolts 34 respectively penetrating through the first U-shaped supporting seat screw holes 31 and the second U-shaped supporting seat screw holes 32, and first locking nuts 37 and second locking nuts 38 respectively arranged on the first locking bolts 33 and the second locking bolts 34, and first flexible cushion blocks 35 and second flexible cushion blocks 36 respectively arranged at one ends of the first locking bolts 33 and the second locking bolts 34.
EXAMPLE five
The creep testing device based on the bent pipe of the steam turbine of the power station as shown in the figures 1, 2, 3, 4, 5 and 6 consists of a horizontal frame fixing component and a high-temperature heating component matched with the horizontal frame fixing component; the horizontal frame fixing assembly comprises a fixing bottom plate 1, a first vertical supporting plate 2 and a second vertical supporting plate 3 which are arranged on the end faces of two ends of the fixing bottom plate 1, a first air cylinder mounting seat 4 and a second air cylinder mounting seat 5 which are respectively arranged on the side walls of the opposite surfaces of the first vertical supporting plate 2 and the second vertical supporting plate 3, a first air cylinder 6 and a second air cylinder 7 which are respectively arranged on the first air cylinder mounting seat 4 and the second air cylinder mounting seat 5, a first connecting plate 8 and a second connecting plate 9 which are respectively arranged at one end of the first air cylinder 6 and one end of the second air cylinder 7, and a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11 which are respectively arranged on one surface of the first connecting plate 8 and one surface of the second connecting plate 9; the high-temperature heating assembly comprises a plurality of high-temperature flexible thermocouple wires 39, and a circumferential strain gauge 40 and an axial strain gauge 19 which are respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the circumferential strain gauge 40 and the axial strain gauge 19 are integrally arranged on one surface of the high-temperature flexible thermocouple wires 39; two ends of a bent pipe to be tested are respectively clamped in the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, high-temperature flexible thermocouple wires 39 are uniformly arranged on the outer wall of the bent pipe to be tested, first vertical limiting plates 23 and second vertical limiting plates 24 which are symmetrically arranged on the end surfaces of two sides of the fixed base plate 1, a first vertical limiting plate transverse waist-shaped through groove 25 and a second vertical limiting plate transverse waist-shaped through groove 26 which are respectively arranged in the first vertical limiting plate 23 and the second vertical limiting plate 24, a first connecting plate through hole 21 and a second connecting plate through hole 22 which are respectively arranged in the first connecting plate 8 and the second connecting plate 9, and a first transverse limiting rod 27 and a first transverse limiting rod 28, two ends of which respectively penetrate through the first connecting plate through hole 21 and the second connecting plate through hole 22 and protrude out of the first vertical limiting plate transverse waist-shaped through groove 25 and the second vertical limiting plate transverse waist-shaped through groove 26, and a first transverse limiting rod 27 and a first transverse limiting rod 28 which are respectively arranged on the first transverse limiting rod 27, the second transverse limiting rod 27, Two sets of first limit nuts 29 and two sets of second limit nuts 30 on the first transverse limiting rod 28, and first U-shaped supporting seat screw holes 31 and second U-shaped supporting seat screw holes 32 respectively arranged in two sides of the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, and first locking bolts 33 and second locking bolts 34 respectively penetrating through the first U-shaped supporting seat screw holes 31 and the second U-shaped supporting seat screw holes 32, and first locking nuts 37 and second locking nuts 38 respectively arranged on the first locking bolts 33 and the second locking bolts 34, and first flexible cushion blocks 35 and second flexible cushion blocks 36 respectively arranged at one ends of the first locking bolts 33 and the second locking bolts 34, and first vertical supporting plates 12 and second vertical supporting plates 14 symmetrically arranged at two side end surfaces of the fixed bottom plate 1 and positioned between the first vertical limiting plates 23 and the second vertical limiting plates 24, and first vertical supporting plates 12 and second vertical supporting plates 14 respectively arranged at two ends of the first vertical supporting plates 12 and the second vertical supporting plates, A first vertical supporting plate waist-shaped through groove 13 and a second vertical supporting plate waist-shaped through groove 15 in one end of a second vertical supporting plate 14, an auxiliary fixing screw rod 16 with two ends respectively penetrating through the first vertical supporting plate waist-shaped through groove 13 and the second vertical supporting plate waist-shaped through groove 15, and auxiliary fixing screw rod locking nuts 20 arranged at two ends of the auxiliary fixing screw rod 16.
EXAMPLE six
The creep testing device based on the bent pipe of the steam turbine of the power station as shown in the figures 1, 2, 3, 4, 5 and 6 consists of a horizontal frame fixing component and a high-temperature heating component matched with the horizontal frame fixing component; the horizontal frame fixing assembly comprises a fixing bottom plate 1, a first vertical supporting plate 2 and a second vertical supporting plate 3 which are arranged on the end faces of two ends of the fixing bottom plate 1, a first air cylinder mounting seat 4 and a second air cylinder mounting seat 5 which are respectively arranged on the side walls of the opposite surfaces of the first vertical supporting plate 2 and the second vertical supporting plate 3, a first air cylinder 6 and a second air cylinder 7 which are respectively arranged on the first air cylinder mounting seat 4 and the second air cylinder mounting seat 5, a first connecting plate 8 and a second connecting plate 9 which are respectively arranged at one end of the first air cylinder 6 and one end of the second air cylinder 7, and a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11 which are respectively arranged on one surface of the first connecting plate 8 and one surface of the second connecting plate 9; the high-temperature heating assembly comprises a plurality of high-temperature flexible thermocouple wires 39, and a circumferential strain gauge 40 and an axial strain gauge 19 which are respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the circumferential strain gauge 40 and the axial strain gauge 19 are integrally arranged on one surface of the high-temperature flexible thermocouple wires 39; two ends of a bent pipe to be tested are respectively clamped in the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, high-temperature flexible thermocouple wires 39 are uniformly arranged on the outer wall of the bent pipe to be tested, first vertical limiting plates 23 and second vertical limiting plates 24 which are symmetrically arranged on the end surfaces of two sides of the fixed base plate 1, a first vertical limiting plate transverse waist-shaped through groove 25 and a second vertical limiting plate transverse waist-shaped through groove 26 which are respectively arranged in the first vertical limiting plate 23 and the second vertical limiting plate 24, a first connecting plate through hole 21 and a second connecting plate through hole 22 which are respectively arranged in the first connecting plate 8 and the second connecting plate 9, and a first transverse limiting rod 27 and a first transverse limiting rod 28, two ends of which respectively penetrate through the first connecting plate through hole 21 and the second connecting plate through hole 22 and protrude out of the first vertical limiting plate transverse waist-shaped through groove 25 and the second vertical limiting plate transverse waist-shaped through groove 26, and a first transverse limiting rod 27 and a first transverse limiting rod 28 which are respectively arranged on the first transverse limiting rod 27, the second transverse limiting rod 27, Two sets of first limit nuts 29 and two sets of second limit nuts 30 on the first transverse limiting rod 28, and first U-shaped supporting seat screw holes 31 and second U-shaped supporting seat screw holes 32 respectively arranged in two sides of the first U-shaped supporting seat 10 and the second U-shaped supporting seat 11, and first locking bolts 33 and second locking bolts 34 respectively penetrating through the first U-shaped supporting seat screw holes 31 and the second U-shaped supporting seat screw holes 32, and first locking nuts 37 and second locking nuts 38 respectively arranged on the first locking bolts 33 and the second locking bolts 34, and first flexible cushion blocks 35 and second flexible cushion blocks 36 respectively arranged at one ends of the first locking bolts 33 and the second locking bolts 34, and first vertical supporting plates 12 and second vertical supporting plates 14 symmetrically arranged at two side end surfaces of the fixed bottom plate 1 and positioned between the first vertical limiting plates 23 and the second vertical limiting plates 24, and first vertical supporting plates 12 and second vertical supporting plates 14 respectively arranged at two ends of the first vertical supporting plates 12 and the second vertical supporting plates, The first vertical support plate waist-shaped through groove 13 and the second vertical support plate waist-shaped through groove 15 in one end of the second vertical support plate 14, the auxiliary fixing screw 16 with two ends respectively penetrating through the first vertical support plate waist-shaped through groove 13 and the second vertical support plate waist-shaped through groove 15, the auxiliary fixing screw locking nuts 20 arranged at two ends of the auxiliary fixing screw 16, the arc-shaped limiting fixture block 17 matched with the auxiliary fixing screw 16 for use, the arc-shaped limiting fixture block through hole 18 arranged in the arc-shaped limiting fixture block 17 and matched with the auxiliary fixing screw 16 for use, and the concave elbow limiting groove 21 arranged on one surface of the arc-shaped limiting fixture block 17, wherein the arc-shaped limiting fixture block through hole 18 is penetrated through two ends of the auxiliary fixing screw 16.
The testing method of the creep testing device based on the power station steam turbine elbow comprises the following steps of 1, respectively clamping two ends of the elbow to be tested into a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11, respectively starting a first air cylinder 6 and a second air cylinder 7, and at the moment, relatively moving the first air cylinder 6 and the second air cylinder 7 to clamp the elbow to be tested. And 2, arranging the high-temperature flexible thermocouple wire 39, the annular strain gauge 40 and the axial strain gauge 19 on the outer wall of the elbow to be tested according to actual installation requirements. And 3, respectively rotating the first locking bolt 33 and the second locking bolt 34, and when the first locking bolt 33 and the second locking bolt 34 rotate to proper positions, locking the first locking bolt 33 and the second locking bolt 34 through the first locking nut 37 and the second locking nut 38, wherein at the moment, the first flexible cushion block 35 and the second flexible cushion block 36 are respectively contacted with two ends of the elbow to be tested to perform clamping action. And 4, clamping the concave elbow limiting groove 21 on one surface of the arc-shaped limiting fixture block 17 into the bending part of the elbow to be tested, locking and fixing the elbow through the arc-shaped limiting fixture block through hole 18, the first vertical support plate waist-shaped through groove 13 and the second vertical support plate waist-shaped through groove 15 by using the auxiliary fixing screw 16 and the auxiliary fixing screw locking nut 20, starting the high-temperature flexible thermocouple wire 39, respectively connecting the high-temperature flexible thermocouple wire 39, the annular strain gauge 40 and the axial strain gauge 19 with a test simulator, and receiving and displaying data information of the high-temperature flexible thermocouple wire 39, the annular strain gauge 40 and the axial strain gauge 19 by the test simulator (not shown in the figure).
In the test method of the creep test device based on the power station steam turbine elbow pipe according to the first to sixth embodiments of the present invention, before clamping the elbow pipe to be tested in step 1, the first connecting plate through hole 21, the second connecting plate through hole 22, the first vertical limiting plate 23, the second vertical limiting plate 24, the first vertical limiting plate horizontal waist-shaped through groove 25, the second vertical limiting plate horizontal waist-shaped through groove 26, the first horizontal limiting rod 27, the first horizontal limiting rod 28, the two sets of first limiting nuts 29, and the two sets of second limiting nuts 30 are respectively used for horizontally supporting and limiting the first connecting plate 8 and the second connecting plate 9.
The creep testing device based on the bent pipe of the power station steam turbine in the first embodiment to the sixth embodiment of the invention has the advantages that on one hand, the overall structural design is reasonable, the real high-temperature creep simulation test can be conveniently carried out on the bent pipe, the service life prediction and analysis can be completed, the operation safety of the power station steam turbine can be improved, and on the other hand, the auxiliary test analysis treatment can be carried out on the production and the manufacture of the bent pipe.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (8)
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| JP2004170161A (en) * | 2002-11-19 | 2004-06-17 | Chugoku Electric Power Co Inc:The | Method and apparatus for high-temperature inner pressure flexural creep test |
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