Creep test device and test method based on power station steam turbine elbow

Abstract

The present invention belongs to the technical field of metal alloy casting application, and specifically discloses a creep test device based on a power station steam turbine bend, which is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component. The creep test device based on a power station steam turbine bend of the present invention and the testing method thereof have the following beneficial effects: 1. Its overall structural design is reasonable, which is convenient for performing a real high-temperature creep simulation test on the bend, completing life prediction and analysis, and improving the safety of power station steam turbine operation; 2. It can perform auxiliary testing and analysis on the production and manufacture of the bend.

Description

Technical Field

[0001] The invention belongs to the technical field of metal alloy casting application, and in particular relates to a creep testing device based on a power station steam turbine elbow and a testing method thereof. Background Art

[0002] At the end of 2016, my country's thermal power generation accounted for about 70%, and the total installed capacity of thermal power accounted for 60%. As of the end of July this year, there were 101 supercritical units; by the end of 2015, my country's natural gas power generation installed capacity had reached 66.37 million kilowatts; in 2016, the proportion of natural gas power generation will reach 33%, exceeding the proportion of coal power for the first time (estimated to be 32%). The shale gas revolution in the United States has achieved new phased results, new energy has developed beyond the norm, the proportion of local areas is too large, the overall installed capacity of power generation is in excess, the growth of electricity load has slowed down, and supercritical thermal power units have been put on the agenda for deep peak regulation. While emphasizing the efficiency and cleanliness of thermal and gas power, more attention is paid to safety and flexibility.

[0003] The R0110 heavy-duty gas turbine design and development project, one of the major special projects of the National Science and Technology Department's 863 Advanced Energy Technology Program for gas turbines, was officially launched in October 2002. After 10 years of hard work, it has made breakthrough progress. On November 29, 2013, the R0110 heavy-duty gas turbine completed a 168-hour combined cycle test operation assessment at CNOOC Shenzhen Power Co., Ltd. As of 10:00 on the 29th, the combined cycle test gas turbine had accumulated a total operation of 209 hours and 20 minutes, and the steam turbine had accumulated a total operation of 187 hours and 57 minutes. All performance indicators of the unit fully met the design requirements.

[0004] The performance of the R0110 heavy-duty gas turbine independently developed by my country can only be considered E-class+ (maximum temperature between 1200˚C-1300˚C), which is one and a half generations behind the H-class gas turbine (E-class -> F-class -> H-class, the H-class can reach a maximum of more than 1600˚C). Although the manufacturing of F-class gas turbines has been introduced for many years, China still does not master key technologies such as hot end components and control systems, let alone compete with foreign countries.

[0005] There is still a big gap between the design, materials, manufacturing, and processes of domestic heavy-duty gas turbines, especially F-class and H-class gas turbines with temperatures exceeding 1400˚C, and the international advanced level. The damage and failure mechanisms of high-temperature structures and components in some design processes have not been fully understood in theory and cannot be used to guide the design of heavy-duty gas turbine components.

[0006] Since the international bidding project for the first bundle of 23 heavy-duty gas turbine combined cycle power plant equipment in my country was launched in 2003, F-class gas turbines have had more than 10 years of operating experience in China. Differences in unit design and operating conditions will cause accidents and unplanned shutdowns of gas turbines. For example, in recent years, gas turbines have been used in southern my country to participate in power grid peak-shaving operations, and the accident rate and life loss have greatly exceeded the design values. At the same time, due to peak-shaving and daily start-stop operation, high-temperature low-cycle fatigue and creep high temperature in complex environments cause crack initiation and development, and finally lead to accidents.

[0007] The main reasons for the above-mentioned problems in high-temperature components of power plants are blades, rotors, elbows and other components. The fatigue creep damage mechanism under multi-axial loads needs further study, and the composite fatigue life model verification test has not been carried out. At the same time, the strength and life prediction methods and analysis of key high-temperature alloy structures under multi-field loads / environments need to be carried out.

[0008] Therefore, based on the above problems, the present invention provides a creep testing device and a testing method based on a bent pipe of a power plant steam turbine. Summary of the invention

[0009] Purpose of the invention: The purpose of the present invention is to provide a creep test device and a test method based on a power plant steam turbine elbow. The overall structural design is reasonable, which is convenient for performing a real high-temperature creep simulation test on the elbow, completing life prediction and analysis, and improving the safety of power plant steam turbine operation.

[0010] Technical solution: One aspect of the present invention provides a creep test device based on a power station steam turbine elbow, which is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component includes a fixed bottom plate, and a first vertical support plate and a second vertical support plate arranged on the end surfaces of both ends of the fixed bottom plate, and a first cylinder mounting seat and a second cylinder mounting seat respectively arranged on the side walls of the first vertical support plate and the second vertical support plate opposite to each other, and a first cylinder and a second cylinder respectively mounted on the first cylinder mounting seat and the second cylinder mounting seat, and a first cylinder and a second cylinder respectively arranged ... A first connecting plate and a second connecting plate at one end of the cylinder and the second cylinder, and a first U-shaped support seat and a second U-shaped support seat respectively arranged on one side of the first connecting plate and the second connecting plate; the high-temperature heating component includes a plurality of high-temperature flexible thermocouple wires, and annular strain gauges and axial strain gauges respectively arranged on the high-temperature flexible thermocouple wires, wherein the annular strain gauge and the axial strain gauge are integrated on one side of the high-temperature flexible thermocouple wire; the two ends of the bent pipe to be tested are respectively inserted into the first U-shaped support seat and the second U-shaped support seat, and the high-temperature flexible thermocouple wires are evenly arranged on the outer wall of the bent pipe to be tested.

[0011] According to the technical solution, the creep testing device based on the power station turbine bent pipe also includes a first vertical limit plate and a second vertical limit plate symmetrically arranged on the end faces of both sides of the fixed bottom plate, and a first vertical limit plate transverse waist-shaped through groove and a second vertical limit plate transverse waist-shaped through groove respectively arranged in the first vertical limit plate and the second vertical limit plate, and a first connecting plate through hole and a second connecting plate through hole respectively arranged in the first connecting plate and the second connecting plate, and a first transverse limit rod and a first transverse limit rod whose two ends respectively penetrate the first connecting plate through hole and the second connecting plate through hole and protrude from the first vertical limit plate transverse waist-shaped through groove and the second vertical limit plate transverse waist-shaped through groove, and two groups of first limit nuts and two groups of second limit nuts respectively arranged on the first transverse limit rod and the first transverse limit rod.

[0012] In the technical solution, the creep testing device based on the power station turbine bent pipe also includes a first U-shaped support seat screw hole and a second U-shaped support seat screw hole respectively arranged on both sides of the first U-shaped support seat and the second U-shaped support seat, and a first locking bolt and a second locking bolt respectively penetrating the first U-shaped support seat screw hole and the second U-shaped support seat screw hole, and a first locking nut and a second locking nut respectively arranged on the first locking bolt and the second locking bolt.

[0013] In the technical solution, the creep testing device based on the power station turbine elbow also includes a first flexible pad and a second flexible pad respectively arranged at one end of the first locking bolt and the second locking bolt.

[0014] According to the technical solution, the creep testing device based on the power station turbine bent pipe also includes a first vertical support plate and a second vertical support plate symmetrically arranged on the end faces of both sides of the fixed base plate and located between the first vertical limit plate and the second vertical limit plate, and a first vertical support plate waist-shaped through groove and a second vertical support plate waist-shaped through groove respectively arranged in one end of the first vertical support plate and the second vertical support plate, and an auxiliary fixing screw with two ends respectively passing through the first vertical support plate waist-shaped through groove and the second vertical support plate waist-shaped through groove, and an auxiliary fixing screw locking nut arranged at both ends of the auxiliary fixing screw.

[0015] According to the technical solution, the creep testing device based on the power station turbine bent pipe also includes an arc-shaped limit block used in conjunction with the auxiliary fixing screw, an arc-shaped limit block through hole arranged in the arc-shaped limit block and used in conjunction with the auxiliary fixing screw, and a concave bent pipe limiting groove arranged on one side of the arc-shaped limit block, wherein both ends of the auxiliary fixing screw pass through the arc-shaped limit block through hole.

[0016] Another invention of the present invention provides a testing method for a creep testing device based on a power plant steam turbine bend, comprising the following steps: Step 1, respectively clamp the two ends of the bend to be tested into the first U-shaped support seat and the second U-shaped support seat, respectively start the first cylinder and the second cylinder, at which time the first cylinder and the second cylinder move relative to each other to clamp the bend to be tested. Step 2, install the high-temperature flexible thermocouple wire, the annular strain gauge, and the axial strain gauge on the outer wall of the bend to be tested as needed. Step 3, respectively rotate the first locking bolt and the second locking bolt, and when they are rotated to the appropriate position, tighten the first locking bolt and the second locking bolt through the first locking nut and the second locking nut, at which time the first flexible pad and the second flexible pad are respectively in contact with the two ends of the bend to be tested for clamping. Step 4. Insert the concave elbow limit groove on one side of the arc limit block into the bend of the elbow to be tested, and use the through hole of the arc limit block, the waist-shaped through groove of the first vertical support plate, and the waist-shaped through groove of the second vertical support plate to lock and fix them using the auxiliary fixing screw and the auxiliary fixing screw locking nut. Turn on the high-temperature flexible thermocouple wire, and the high-temperature flexible thermocouple wire, the annular strain gauge, and the axial strain gauge are respectively connected to the test simulator. The test simulator receives and displays the data information of the high-temperature flexible thermocouple wire, the annular strain gauge, and the axial strain gauge.

[0017] In the technical solution, before clamping the bend pipe to be tested in step 1, the first connecting plate and the second connecting plate are horizontally supported and limited by the first connecting plate through hole, the second connecting plate through hole, the first vertical limit plate, the second vertical limit plate, the first vertical limit plate transverse waist-shaped through groove, the second vertical limit plate transverse waist-shaped through groove, the first transverse limit rod, the first transverse limit rod, two groups of first limit nuts, and two groups of second limit nuts.

[0018] Compared with the prior art, the creep testing device and testing method based on the power plant steam turbine bent pipe of the present invention have the following beneficial effects: 1. Its overall structural design is reasonable, which is convenient for performing real high-temperature creep simulation tests on the bent pipes, completing life prediction and analysis, and improving the safety of power plant steam turbine operations; 2. It can perform auxiliary testing and analysis on the production and manufacture of bent pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial structural schematic diagram of a creep test device based on a power station steam turbine elbow according to the present invention;

[0020] Figure 2 It is a schematic diagram of a top view of a partial structure of a creep test device based on a power station steam turbine elbow according to the present invention;

[0021] Figure 3It is a top view structural schematic diagram of the arc-shaped limit block, the concave bend limit groove, the arc-shaped limit block through hole, the first vertical support plate waist-shaped through groove, the second vertical support plate waist-shaped through groove, the auxiliary fixing screw, the auxiliary fixing screw locking nut, etc. of the creep test device based on the power station steam turbine elbow of the present invention;

[0022] Figure 4 It is a side view structural schematic diagram of an arc-shaped limit block, a concave bend limit groove, and an arc-shaped limit block through hole of a creep test device based on a power station steam turbine bend pipe of the present invention;

[0023] Figure 5 It is a side view structural schematic diagram of a bent pipe to be tested, a high temperature flexible thermocouple wire, a hoop strain gauge, and an axial strain gauge of a creep test device based on a bent pipe of a power station steam turbine according to the present invention;

[0024] Figure 6 The invention is a schematic diagram of a test vertical structure of a bent pipe to be tested and a high-temperature flexible thermocouple wire of a creep test device based on a bent pipe of a power station steam turbine of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0026] Embodiment 1

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The creep test device based on the bent pipe of the power station steam turbine shown in the figure is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component includes a fixed bottom plate 1, and a first vertical support plate 2 and a second vertical support plate 3 arranged on the end faces of both ends of the fixed bottom plate 1, and a first cylinder mounting seat 4 and a second cylinder mounting seat 5 respectively arranged on the side walls of the opposite surfaces of the first vertical support plate 2 and the second vertical support plate 3, and a first cylinder 6 and a second cylinder 7 respectively mounted on the first cylinder mounting seat 4 and the second cylinder mounting seat 5, and a first cylinder 6 and a second cylinder 7 respectively arranged at one end of the first cylinder 6 and the second cylinder 7 A connecting plate 8, a second connecting plate 9, and a first U-shaped support seat 10 and a second U-shaped support seat 11 respectively arranged on one side of the first connecting plate 8 and the second connecting plate 9; the high-temperature heating component includes a plurality of high-temperature flexible thermocouple wires 39, and annular strain gauges 40 and axial strain gauges 19 respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the annular strain gauges 40 and the axial strain gauges 19 are integrated on one side of the high-temperature flexible thermocouple wires 39; the two ends of the bent pipe to be tested are respectively inserted into the first U-shaped support seat 10 and the second U-shaped support seat 11, and the high-temperature flexible thermocouple wires 39 are evenly arranged on the outer wall of the bent pipe to be tested.

[0028] Embodiment 2

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The creep test device based on the bent pipe of the power station steam turbine shown in the figure is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component includes a fixed base plate 1, and a first vertical support plate 2 and a second vertical support plate 3 arranged on the end faces of both ends of the fixed base plate 1, and a first cylinder mounting seat 4 and a second cylinder mounting seat 5 respectively arranged on the side walls of the opposite surfaces of the first vertical support plate 2 and the second vertical support plate 3, and a first cylinder 6 and a second cylinder 7 respectively mounted on the first cylinder mounting seat 4 and the second cylinder mounting seat 5, and a first connecting plate 8 and a second connecting plate 9 respectively arranged at one end of the first cylinder 6 and the second cylinder 7, and a first U-shaped supporting seat 10 and a second U-shaped supporting seat 11 respectively arranged on one side of the first connecting plate 8 and the second connecting plate 9; the high-temperature heating component includes a plurality of high-temperature flexible thermocouple wires 39, and annular strain gauges 40 and axial strain gauges 19 respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the annular strain gauge 40 , the axial strain gauge 19 is integrated on one side of the high-temperature flexible thermocouple wire 39; the two ends of the bend to be tested are respectively inserted into the first U-shaped support seat 10 and the second U-shaped support seat 11, the high-temperature flexible thermocouple wire 39 is evenly arranged on the outer wall of the bend to be tested, and the first vertical limit plate 23 and the second vertical limit plate 24 are symmetrically arranged on the end faces of both sides of the fixed bottom plate 1, and the first vertical limit plate horizontal waist-shaped through groove 25 and the second vertical limit plate horizontal waist-shaped through groove 25 are respectively arranged in the first vertical limit plate 23 and the second vertical limit plate 24. Groove 26, and the first connecting plate through hole 21 and the second connecting plate through hole 22 respectively arranged in the first connecting plate 8 and the second connecting plate 9, and the first horizontal limit rod 27 and the first horizontal limit rod 28 whose two ends respectively penetrate the first connecting plate through hole 21 and the second connecting plate through hole 22 and protrude from the first vertical limit plate transverse waist-shaped through groove 25 and the second vertical limit plate transverse waist-shaped through groove 26, and two groups of first limit nuts 29 and two groups of second limit nuts 30 respectively arranged on the first horizontal limit rod 27 and the first horizontal limit rod 28.

[0030] Embodiment 3

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The creep test device based on the bent pipe of a power plant steam turbine shown in the figure is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component includes a fixed base plate 1, and a first vertical support plate 2 and a second vertical support plate 3 arranged on the end faces of both ends of the fixed base plate 1, and a first cylinder mounting seat 4 and a second cylinder mounting seat 5 respectively arranged on the side walls of the opposite surfaces of the first vertical support plate 2 and the second vertical support plate 3, and a first cylinder 6 and a second cylinder 7 respectively mounted on the first cylinder mounting seat 4 and the second cylinder mounting seat 5, and a first cylinder 6 and a second cylinder 7 respectively arranged on the first cylinder 6 and the second cylinder The first connecting plate 8 and the second connecting plate 9 at one end of the test tube, and the first U-shaped support seat 10 and the second U-shaped support seat 11 are respectively arranged on one side of the first connecting plate 8 and the second connecting plate 9; the high temperature heating component includes a plurality of high temperature flexible thermocouple wires 39, and annular strain gauges 40 and axial strain gauges 19 are respectively arranged on the high temperature flexible thermocouple wires 39, wherein the annular strain gauges 40 and the axial strain gauges 19 are integrated on one side of the high temperature flexible thermocouple wires 39; the two ends of the bent pipe to be tested are respectively inserted into the first U-shaped support seat 10 and the second U-shaped support seat 11, and the high temperature flexible thermocouple wires 39 are The first vertical limit plate 23 and the second vertical limit plate 24 are evenly arranged on the outer wall of the bent pipe to be tested, and are symmetrically arranged on the end surfaces of both sides of the fixed bottom plate 1, and the first vertical limit plate transverse waist-shaped through groove 25 and the second vertical limit plate transverse waist-shaped through groove 26 are respectively arranged in the first vertical limit plate 23 and the second vertical limit plate 24, and the first connecting plate through hole 21 and the second connecting plate through hole 22 are respectively arranged in the first connecting plate 8 and the second connecting plate 9, and the first transverse limit plate 21 and the second connecting plate through hole 22 at both ends respectively penetrate the first connecting plate through hole 21 and the second connecting plate through hole 22 and protrude the first vertical limit plate transverse waist-shaped through groove 25 and the second vertical limit plate transverse waist-shaped through groove 26. Rod 27, first transverse limiting rod 28, and two groups of first limiting nuts 29 and two groups of second limiting nuts 30 respectively arranged on the first transverse limiting rod 27 and the first transverse limiting rod 28, and first U-shaped support seat screw holes 31 and second U-shaped support seat screw holes 32 respectively arranged on both sides of the first U-shaped support seat 10 and the second U-shaped support seat 11, and first locking bolts 33 and second locking bolts 34 respectively penetrating the first U-shaped support seat screw holes 31 and the second U-shaped support 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.

[0032] Embodiment 4

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The creep test device based on the bent pipe of the power station steam turbine shown in the figure is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component includes a fixed base plate 1, and a first vertical support plate 2 and a second vertical support plate 3 arranged on the end faces of both ends of the fixed base plate 1, and a first cylinder mounting seat 4 and a second cylinder mounting seat 5 respectively arranged on the side walls of the opposite surfaces of the first vertical support plate 2 and the second vertical support plate 3, and a first cylinder 6 and a second cylinder 7 respectively mounted on the first cylinder mounting seat 4 and the second cylinder mounting seat 5, and a first connecting plate 8 respectively arranged at one end of the first cylinder 6 and the second cylinder 7 A second connecting plate 9, and a first U-shaped support seat 10 and a second U-shaped support seat 11 respectively arranged on one side of the first connecting plate 8 and the second connecting plate 9; the high-temperature heating component includes a plurality of high-temperature flexible thermocouple wires 39, and annular strain gauges 40 and axial strain gauges 19 respectively arranged on the high-temperature flexible thermocouple wires 39, wherein the annular strain gauges 40 and the axial strain gauges 19 are integrated on one side of the high-temperature flexible thermocouple wires 39; the two ends of the bent pipe to be tested are respectively inserted into the first U-shaped support seat 10 and the second U-shaped support seat 11, the high-temperature flexible thermocouple wires 39 are evenly arranged on the outer wall of the bent pipe to be tested, and symmetrically arranged on the fixed bottom plate The first vertical limiting plate 23 and the second vertical limiting plate 24 on the end surfaces of both sides, and the first vertical limiting plate transverse waist-shaped through grooves 25 and the second vertical limiting plate transverse waist-shaped through grooves 26 respectively arranged in the first vertical limiting plate 23 and the second vertical limiting plate 24, and the first connecting plate through holes 21 and the second connecting plate through holes 22 respectively arranged in the first connecting plate 8 and the second connecting plate 9, and the first transverse limiting rods 27 and the first transverse limiting rods 28 respectively penetrating the first connecting plate through holes 21 and the second connecting plate through holes 22 at both ends and protruding from the first vertical limiting plate transverse waist-shaped through grooves 25 and the second vertical limiting plate transverse waist-shaped through grooves 26, and the first transverse limiting rods 27 and the first transverse limiting rods 28 respectively arranged in the first transverse limiting rods 27 and the first transverse limiting rods 29. Two groups of first limiting nuts 29 and two groups of second limiting nuts 30 on the rod 28, and first U-shaped support seat screw holes 31 and second U-shaped support seat screw holes 32 respectively arranged on both sides of the first U-shaped support seat 10 and the second U-shaped support seat 11, and first locking bolts 33 and second locking bolts 34 respectively penetrating the first U-shaped support seat screw holes 31 and the second U-shaped support 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 pads 35 and second flexible pads 36 respectively arranged at one end of the first locking bolts 33 and the second locking bolts 34.

[0034] Embodiment 5

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The creep test device based on the bent pipe of the power station steam turbine shown in the figure is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component includes a fixed base plate 1, and a first vertical support plate 2 and a second vertical support plate 3 arranged on the end surfaces of both ends of the fixed base plate 1, and a first cylinder mounting seat 4 and a second cylinder mounting seat 5 respectively arranged on the side walls of the first vertical support plate 2 and the second vertical support plate 3 opposite to each other, and a first cylinder 6, The second cylinder 7, and the first connecting plate 8 and the second connecting plate 9 respectively arranged at one end of the first cylinder 6 and the second cylinder 7, and the first U-shaped support seat 10 and the second U-shaped support seat 11 respectively arranged on one side of the first connecting plate 8 and the second connecting plate 9; the high temperature heating component includes a plurality of high temperature flexible thermocouple wires 39, and annular strain gauges 40 and axial strain gauges 19 respectively arranged on the high temperature flexible thermocouple wires 39, wherein the annular strain gauges 40 and the axial strain gauges 19 are integrated and arranged on one side of the high temperature flexible thermocouple wires 39;The two ends of the bend to be tested are respectively inserted into the first U-shaped support seat 10 and the second U-shaped support seat 11, and the high-temperature flexible thermocouple wire 39 is evenly arranged on the outer wall of the bend to be tested, and the first vertical limit plate 23 and the second vertical limit plate 24 are symmetrically arranged on the end faces of both sides of the fixed bottom plate 1, and the first vertical limit plate horizontal waist-shaped groove 25 and the second vertical limit plate horizontal waist-shaped groove 26 are respectively arranged in the first vertical limit plate 23 and the second vertical limit plate 24, and the first connecting plate 8 and the second connecting plate 9 are respectively arranged in The through hole 21, the second connecting plate through hole 22, and the first horizontal limiting rod 27 and the first horizontal limiting rod 28, which respectively penetrate the first connecting plate through hole 21 and the second connecting plate through hole 22 at both ends and protrude from the first vertical limiting plate horizontal waist-shaped through groove 25 and the second vertical limiting plate horizontal waist-shaped through groove 26, and two groups of first limiting nuts 29 and two groups of second limiting nuts 30 are respectively arranged on the first horizontal limiting rod 27 and the first horizontal limiting rod 28, and the first U-shaped support seat 10 and the second U-shaped support seat 11 are respectively arranged on both sides. The support base screw hole 31, the second U-shaped support base screw hole 32, and the first locking bolt 33 and the second locking bolt 34 respectively penetrating the first U-shaped support base screw hole 31 and the second U-shaped support base screw hole 32, and the first locking nut 37 and the second locking nut 38 respectively arranged on the first locking bolt 33 and the second locking bolt 34, and the first flexible pad 35 and the second flexible pad 36 respectively arranged at one end of the first locking bolt 33 and the second locking bolt 34, and the symmetrically arranged on the end surfaces of both sides of the fixed base plate 1 and The first vertical support plate 12 and the second vertical support plate 14 located between the first vertical limit plate 23 and the second vertical limit plate 24, and the first vertical support plate waist-shaped through groove 13 and the second vertical support plate waist-shaped through groove 15 respectively arranged in one end of the first vertical support plate 12 and the second vertical support plate 14, and the auxiliary fixing screw 16 respectively passing through the first vertical support plate waist-shaped through groove 13 and the second vertical support plate waist-shaped through groove 15 at both ends, and the auxiliary fixing screw locking nuts 20 arranged at both ends of the auxiliary fixing screw 16. ;

[0036] Embodiment 6

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The creep test device based on the bent pipe of the power station steam turbine shown in the figure is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component includes a fixed base plate 1, and a first vertical support plate 2 and a second vertical support plate 3 arranged on the end surfaces of both ends of the fixed base plate 1, and a first cylinder mounting seat 4 and a second cylinder mounting seat 5 respectively arranged on the side walls of the first vertical support plate 2 and the second vertical support plate 3 opposite to each other, and a first cylinder 6, The second cylinder 7, and the first connecting plate 8 and the second connecting plate 9 respectively arranged at one end of the first cylinder 6 and the second cylinder 7, and the first U-shaped support seat 10 and the second U-shaped support seat 11 respectively arranged on one side of the first connecting plate 8 and the second connecting plate 9; the high temperature heating component includes a plurality of high temperature flexible thermocouple wires 39, and annular strain gauges 40 and axial strain gauges 19 respectively arranged on the high temperature flexible thermocouple wires 39, wherein the annular strain gauges 40 and the axial strain gauges 19 are integrated and arranged on one side of the high temperature flexible thermocouple wires 39;The two ends of the bend to be tested are respectively inserted into the first U-shaped support seat 10 and the second U-shaped support seat 11, the high-temperature flexible thermocouple wire 39 is evenly arranged on the outer wall of the bend to be tested, and the first vertical limit plate 23 and the second vertical limit plate 24 are symmetrically arranged on the end faces of both sides of the fixed bottom plate 1, and the first vertical limit plate transverse waist-shaped through groove 25 and the second vertical limit plate transverse waist-shaped through groove 26 are respectively arranged in the first vertical limit plate 23 and the second vertical limit plate 24, and the first connecting plate through hole 21 and the second connecting plate through hole 22 are respectively arranged in the first connecting plate 8 and the second connecting plate 9, and the two ends respectively pass through the first connecting plate through hole 21, a first horizontal limiting rod 27 and a first horizontal limiting rod 28 that protrude from the first vertical limiting plate horizontal waist-shaped through-hole 22 and the second vertical limiting plate horizontal waist-shaped through-hole 26, and two groups of first limiting nuts 29 and two groups of second limiting nuts 30 are respectively arranged on the first horizontal limiting rod 27 and the first horizontal limiting rod 28, and a first U-shaped support seat screw hole 31 and a second U-shaped support seat screw hole 32 are respectively arranged on both sides of the first U-shaped support seat 10 and the second U-shaped support seat 11, and a first locking bolt 33 and a second locking bolt 34 that respectively penetrate through the first U-shaped support seat screw hole 31 and the second U-shaped support seat screw hole 32. The second locking bolt 34, and the first locking nut 37 and the second locking nut 38 are respectively arranged on the first locking bolt 33 and the second locking bolt 34, and the first flexible pad 35 and the second flexible pad 36 are respectively arranged at one end of the first locking bolt 33 and the second locking bolt 34, and the first vertical support plate 12 and the second vertical support plate 14 are symmetrically arranged on the end surfaces of both sides of the fixed base plate 1 and located between the first vertical limit plate 23 and the second vertical limit plate 24, and the first vertical support plate waist-shaped through groove 13 and the second vertical support plate 14 are respectively arranged in one end of the first vertical support plate 12 and the second vertical support plate 14. The first vertical support plate waist-shaped through groove 15, and the auxiliary fixing screw 16 whose two ends respectively penetrate the first vertical support plate waist-shaped through groove 13 and the second vertical support plate waist-shaped through groove 15, and the auxiliary fixing screw locking nuts 20 arranged at both ends of the auxiliary fixing screw 16, and the arc-shaped limiting block 17 used in conjunction with the auxiliary fixing screw 16, and the arc-shaped limiting block through hole 18 arranged in the arc-shaped limiting block 17 and used in conjunction with the auxiliary fixing screw 16, and the concave elbow limiting groove 21 arranged on one side of the arc-shaped limiting block 17, wherein the two ends of the auxiliary fixing screw 16 penetrate the arc-shaped limiting block through hole 18. ;

[0038] The testing method of the creep testing device based on the power station steam turbine elbow of the first to sixth embodiments of the present invention includes the following steps: step 1, respectively clamp the two ends of the elbow to be tested into the first U-shaped support seat 10 and the second U-shaped support seat 11, respectively start the first cylinder 6 and the second cylinder 7, at this time, the first cylinder 6 and the second cylinder 7 move relative to each other to clamp the elbow to be tested. Step 2, install 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 as needed. Step 3, respectively rotate the first locking bolt 33 and the second locking bolt 34, and when they are rotated to the appropriate position, the first locking nut 37 and the second locking nut 38 are used to lock the first locking bolt 33 and the second locking bolt 34, at this time, the first flexible pad 35 and the second flexible pad 36 are respectively in contact with the two ends of the elbow to be tested for clamping. Step 4, insert the concave bend limit groove 21 on one side of the arc limit block 17 into the bend of the bend to be tested, and use the arc limit 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 to lock and fix using the auxiliary fixing screw 16 and the auxiliary fixing screw locking nut 20, turn on the high-temperature flexible thermocouple wire 39, the high-temperature flexible thermocouple wire 39, the annular strain gauge 40, and the axial strain gauge 19 are respectively connected to the test simulator, and the test simulator (not marked in the figure) receives and displays the data information of the high-temperature flexible thermocouple wire 39, the annular strain gauge 40, and the axial strain gauge 19.

[0039] In the testing method of the creep testing device based on the power station turbine bent pipe of Examples 1 to 6 of the present invention, before the bent pipe to be tested is clamped in step 1, the first connecting plate 8 and the second connecting plate 9 are horizontally supported and limited by the first connecting plate through hole 21, the second connecting plate through hole 22, the first vertical limit plate 23, the second vertical limit plate 24, the first vertical limit plate transverse waist-shaped groove 25, the second vertical limit plate transverse waist-shaped groove 26, the first transverse limit rod 27, the first transverse limit rod 28, two groups of first limit nuts 29, and two groups of second limit nuts 30.

[0040] The creep testing device based on the power plant steam turbine bent pipe of Examples 1 to 6 of the present invention, on the one hand, has a reasonable overall structural design, which is convenient for performing real high-temperature creep simulation tests on the bent pipes, completing life prediction and analysis, and improving the safety of power plant steam turbine operations; on the other hand, it can perform auxiliary testing and analysis on the production and manufacture of the bent pipes.

[0041] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. A creep test device based on a power station steam turbine elbow, characterized in that: The invention is composed of a horizontal frame fixing component and a high-temperature heating component used in conjunction with the horizontal frame fixing component; the horizontal frame fixing component comprises a fixing base plate (1), a first vertical support plate (2) and a second vertical support plate (3) arranged on the end surfaces of both ends of the fixing base plate (1), a first cylinder mounting seat (4) and a second cylinder mounting seat (5) respectively arranged on the side walls of the first vertical support plate (2) and the second vertical support plate (3) opposite to each other, a first cylinder (6) and a second cylinder (7) respectively mounted on the first cylinder mounting seat (4) and the second cylinder mounting seat (5), and a first connecting plate (8) and a second connecting plate respectively arranged at one end of the first cylinder (6) and the second cylinder (7). (9), and a first U-shaped support seat (10) and a second U-shaped support seat (11) respectively arranged on one side of the first connecting plate (8) and the second connecting plate (9); the high-temperature heating component comprises a plurality of high-temperature flexible thermocouple wires (39), and annular strain gauges (40) and axial strain gauges (19) respectively arranged on the high-temperature flexible thermocouple wires (39), wherein the annular strain gauges (40) and the axial strain gauges (19) are integrated on one side of the high-temperature flexible thermocouple wires (39); the two ends of the bent pipe to be tested are respectively inserted into the first U-shaped support seat (10) and the second U-shaped support seat (11), and the high-temperature flexible thermocouple wires (39) are evenly arranged on the outer wall of the bent pipe to be tested; It also comprises a first vertical limit plate (23) and a second vertical limit plate (24) symmetrically arranged on the end surfaces of both sides of the fixed bottom plate (1), and a first vertical limit plate transverse waist-shaped through groove (25) and a second vertical limit plate transverse waist-shaped through groove (26) respectively arranged in the first vertical limit plate (23) and the second vertical limit plate (24), and a first connecting plate through hole (21) and a second connecting plate through hole (22) respectively arranged in the first connecting plate (8) and the second connecting plate (9), and a first transverse limit rod (27) and a second transverse limit rod (28) with two ends respectively penetrating the first connecting plate through hole (21) and the second connecting plate through hole (22) and protruding from the first vertical limit plate transverse waist-shaped through groove (25) and the second vertical limit plate transverse waist-shaped through groove (26), and two groups of first limit nuts (29) and two groups of second limit nuts (30) respectively arranged on the first transverse limit rod (27) and the second transverse limit rod (28); It also includes a first vertical support plate (12) and a second vertical support plate (14) symmetrically arranged on the end surfaces of both sides of the fixed bottom plate (1) and located between the first vertical limit plate (23) and the second vertical limit plate (24), a first vertical support plate waist-shaped through groove (13) and a second vertical support plate waist-shaped through groove (15) respectively arranged in one end of the first vertical support plate (12) and the second vertical support plate (14), an auxiliary fixing screw (16) with two ends respectively penetrating the first vertical support plate waist-shaped through groove (13) and the second vertical support plate waist-shaped through groove (15), and an auxiliary fixing screw locking nut (20) arranged at both ends of the auxiliary fixing screw (16).

2. The creep test device based on the bent pipe of a power plant steam turbine according to claim 1 is characterized in that: The creep test device based on a power station steam turbine elbow further comprises a first U-shaped support seat screw hole (31) and a second U-shaped support seat screw hole (32) respectively arranged on both 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) respectively penetrating 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) respectively arranged on the first locking bolt (33) and the second locking bolt (34).

3. The creep test device based on the bent pipe of a power plant steam turbine according to claim 2 is characterized in that: The creep test device based on a power station steam turbine elbow further comprises a first flexible pad (35) and a second flexible pad (36) respectively arranged at one end of the first locking bolt (33) and the second locking bolt (34).

4. The creep test device based on the bent pipe of a power plant steam turbine according to claim 3 is characterized in that: The creep test device based on a power station steam turbine elbow further comprises an arc-shaped limit block (17) used in conjunction with the auxiliary fixing screw (16), an arc-shaped limit block through hole (18) arranged in the arc-shaped limit block (17) and used in conjunction with the auxiliary fixing screw (16), and a concave elbow limit groove arranged on one side of the arc-shaped limit block (17), wherein both ends of the auxiliary fixing screw (16) pass through the arc-shaped limit block through hole (18).

5. The testing method based on the creep testing device of the power station steam turbine elbow according to claim 4 is characterized in that: The following steps are included: Step 1, clamping the two ends of the bent pipe to be tested into the first U-shaped support seat (10) and the second U-shaped support seat (11) respectively, and starting the first cylinder (6) and the second cylinder (7) respectively, so that the first cylinder (6) and the second cylinder (7) move relative to each other to clamp the bent pipe to be tested; Step 2: Install the high temperature flexible thermocouple wire (39), the annular strain gauge (40), and the axial strain gauge (19) on the outer wall of the bent pipe to be tested as required; Step 3, respectively rotating the first locking bolt (33) and the second locking bolt (34), and when they are rotated to a suitable position, locking the first locking bolt (33) and the second locking bolt (34) by means of the first locking nut (37) and the second locking nut (38), at which time the first flexible pad (35) and the second flexible pad (36) respectively contact the two ends of the bent pipe to be tested to perform a clamping action; Step 4, insert the concave bending pipe limiting groove on one side of the arc-shaped limiting block (17) into the bending part of the bending pipe to be tested, and lock and fix the arc-shaped limiting block through the through hole (18), the waist-shaped through groove (13) of the first vertical support plate, and the waist-shaped through groove (15) of the second vertical support plate using the auxiliary fixing screw (16) and the auxiliary fixing screw locking nut (20), open the high-temperature flexible thermocouple wire (39), the high-temperature flexible thermocouple wire (39), the annular strain gauge (40), and the axial strain gauge (19) are respectively connected to the test simulator, and the test simulator receives and displays the data information of the high-temperature flexible thermocouple wire (39), the annular strain gauge (40), and the axial strain gauge (19).

6. The testing method based on the creep testing device of the power station steam turbine elbow according to claim 5 is characterized in that: Before the bent pipe to be tested is clamped in step 1, the first connecting plate (8) and the second connecting plate (9) are horizontally supported and limited by 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 transverse waist-shaped through groove (25), the second vertical limiting plate transverse waist-shaped through groove (26), the first transverse limiting rod (27), the second transverse limiting rod (28), two groups of first limiting nuts (29), and two groups of second limiting nuts (30).

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