CN214408469U - Creep property testing device for heat-resistant steel micro-sample for power station - Google Patents
Creep property testing device for heat-resistant steel micro-sample for power station Download PDFInfo
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- CN214408469U CN214408469U CN202120484701.2U CN202120484701U CN214408469U CN 214408469 U CN214408469 U CN 214408469U CN 202120484701 U CN202120484701 U CN 202120484701U CN 214408469 U CN214408469 U CN 214408469U
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Abstract
The utility model discloses a creep property testing device for a heat-resistant steel micro-sample for a power station, weights are placed on a supporting seat, the upper end of a plunger is connected with the supporting seat, the lower end of the plunger passes through an upper cross beam and is inserted into a quartz tube, the upper end of the quartz tube is fixed on the upper cross beam, the lower end of the quartz tube is fixed on a lower cross beam, an open-type tube furnace is sheathed outside the quartz tube, a clamp is arranged in the quartz tube and comprises an upper clamp and a lower clamp, wherein, a sample to be tested is clamped between the upper clamp and the lower clamp, the lower end of the plunger passes through the lower clamp and is contacted with the central position of the upper surface of the sample to be tested, the upper end of the quartz rod is contacted with the central position of the bottom of the sample to be tested, the lower end of the quartz rod is matched with a displacement sensor after passing through the lower clamp, the displacement sensor is positioned on a supporting base, and the output end of the displacement sensor is connected with a displacement recorder, the device can accurately measure the relation between the deformation of the micro sample and the time, and has the characteristic of short test time.
Description
Technical Field
The utility model belongs to metal material mechanical properties test field relates to a power station is with heat-resistant steel micro specimen creep performance testing arrangement.
Background
Due to the particularity of energy resources in China, thermal power generation is still the main mode of power resource supply and storage in China. With the continuous increase of the demand of China on electric power, thermal power generation equipment is continuously optimized and improved, and an ultra-supercritical thermal power generator set becomes the first choice equipment at present. The operating temperature of the ultra-supercritical thermal power generating unit is higher than 600 ℃, the internal steam pressure is high, the service environment is severe, the operating conditions are harsh, and the requirements on the performance of key component materials of the unit are high.
The creep performance of a thermal power generating set is an important basis for measuring the service life and the operation condition of the set when the thermal power generating set works under a high-temperature working condition for a long time, a single-shaft creep tensile test method is generally adopted for testing the creep performance at present by using a standard creep sample, but the method has the problems of large sample size, long test time consumption, high cost, high consumption and the like, and for an in-service set, the standard creep sample is prepared and needs to be directly cut and sampled on equipment/parts in service, so that the equipment is directly damaged and cannot be used, which is the biggest defect of the method at present. Therefore, it is the best way to solve the above problems at present to develop a new micro-sample testing device and creep performance testing method for non-destructive sampling of in-service equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a power station is with little sample creep performance testing arrangement of heat-resistant steel, the device can the accurate measurement little sample warp with the relation of time, and has experimental weak point consuming time, with low costs and consume few characteristics.
In order to achieve the purpose, the creep property testing device for the heat-resistant steel micro-sample for the power station comprises a supporting seat, a punch, an upper cross beam, a quartz tube, a lower cross beam, an open type tubular furnace, a quartz rod, a displacement sensor, a supporting base and a displacement recorder;
the weight has been placed on the supporting seat, and the upper end of jumper bar is connected with the supporting seat, and the lower extreme of jumper bar passes the entablature and inserts in the quartz capsule, and on the entablature was fixed in to the upper end of quartz capsule, the lower extreme of quartz capsule was fixed in on the bottom end rail, and open tubular furnace cup joints in the outside of quartz capsule, is provided with anchor clamps in the quartz capsule, anchor clamps include anchor clamps and lower anchor clamps, and wherein, the sample centre gripping that awaits measuring between upper clamp and lower anchor clamps, the lower extreme of jumper bar passes the lower anchor clamps and contacts with the central point that awaits measuring the appearance upper surface, and the upper end of quartz bar contacts with the central point that awaits measuring the sample bottom, and the lower extreme of quartz bar cooperatees with displacement sensor after passing the lower anchor clamps, and displacement sensor is located the support base, and displacement sensor's output is connected with the displacement record appearance.
The quartz tube is connected with the upper cross beam and the lower cross beam through flanges and bolts.
The upper clamp and the lower clamp are connected through a fastening bolt.
The ceramic tube is positioned in the quartz tube, the lower end of the ceramic tube is fixed on the lower cross beam, and the upper end of the ceramic tube is fixed on the lower clamp.
The device also comprises a K-type thermocouple for detecting the temperature in the quartz tube, wherein the K-type thermocouple is connected with the open tube furnace.
The punching die further comprises a sleeve, wherein the sleeve penetrates through the upper cross beam, and a sliding bearing is arranged between the sleeve and the punch.
The quartz tube protection device further comprises a gas protection system, wherein the gas protection system is communicated with the quartz tube.
The displacement sensor is fixed on the supporting base through the magnetic attraction base.
The utility model discloses following beneficial effect has:
power station is with heat-resisting steel micro sample creep performance testing arrangement when concrete operation, the sample that awaits measuring is located the quartz capsule, and the sample centre gripping that awaits measuring is in anchor clamps, when measuring, the central point department of putting on the sample upper portion that awaits measuring through weight and jumper bar exerts the effort, herein simultaneously, the upper end of quartz capsule and the central point of the sample lower surface that awaits measuring put and contact, the lower extreme and the displacement sensor of quartz capsule cooperate, thereby directly measure the change of the sample central deflection that awaits measuring, record the relation of micro sample deformation and time simultaneously, and obtain sample creep performance according to the change of the sample central deflection that awaits measuring, and convenient operation, and is simple, and is low in cost, and the test time is short.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the upper clamp of the present invention;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 4 is a schematic structural view of the middle and lower clamps of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
fig. 6 is a schematic structural view of the middle flange of the present invention.
Wherein, 1 is a weight, 2 is a support base, 3 is a punch, 4 is an open tubular furnace, 5 is a clamp, 6 is a flange, 7 is a displacement sensor, 8 is a support base, 9 is a sleeve, 10 is an upper beam, 11 is a quartz tube, 12 is a fastening bolt, 13 is a ceramic tube, 14 is a K-type thermocouple, and 15 is a quartz rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
the present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 to 6, the creep property testing device for a heat-resistant steel micro-sample for a power station of the present invention comprises a supporting seat 2, a ram 3, an upper beam 10, a quartz tube 11, a lower beam, an open tubular furnace 4, a quartz rod 15, a displacement sensor 7, a supporting base 8 and a displacement recorder; the weight 1 is placed on the supporting seat 2, the upper end of the punch 3 is connected with the supporting seat 2, the lower end of the punch 3 penetrates through the upper cross beam 10 and is inserted into the quartz tube 11, the upper end of the quartz tube 11 is fixed on the upper cross beam 10, the lower end of the quartz tube 11 is fixed on the lower cross beam, the open-type tube furnace 4 is sleeved outside the quartz tube 11, the clamp 5 is arranged in the quartz tube 11 and comprises an upper clamp and a lower clamp, wherein a sample to be tested is clamped between the upper clamp and the lower clamp, the lower end of the punch 3 penetrates through the lower clamp and is contacted with the central position of the upper surface of a sample to be tested, the upper end of the quartz rod 15 is contacted with the central position of the bottom of the sample to be tested, the lower end of the quartz rod 15 penetrates through the lower clamp and is matched with the displacement sensor 7, the displacement sensor 7 is positioned on the supporting base 8, the output end of the displacement sensor 7 is connected with the displacement recorder, wherein, the displacement sensor 7 is fixed on the supporting base 8 through the magnetic suction base.
The quartz tube 11 is connected with the upper crossbeam 10 and the lower crossbeam through the flange 6 and the bolt; the upper clamp and the lower clamp are connected through a fastening bolt 12.
The utility model also comprises a gas protection system, a sleeve 9, a ceramic tube 13 and a K-type thermocouple 14 for detecting the temperature in the quartz tube 11, wherein the ceramic tube 13 is positioned in the quartz tube 11, the lower end of the ceramic tube 13 is fixed on the lower beam, and the upper end of the ceramic tube 13 is fixed on the lower clamp; the K-type thermocouple 14 is connected with the open type tube furnace 4; the sleeve 9 penetrates through the upper cross beam 10, and a sliding bearing is arranged between the sleeve 9 and the punch 3; the gas protection system is in communication with the quartz tube 11.
The upper surface of lower anchor clamps is provided with the cylindrical recess that is used for placing the sample, and this cylindrical recess is the same with the diameter of the sample that awaits measuring, can guarantee that the sample center that awaits measuring is in loading ram 3 under, and the sample specification is phi 8 x 0.5mm, can carry out the nondestructive sample to the equipment of being in service and not cause the destructive damage of equipment.
The lower terminal surface of going up anchor clamps is provided with the boss, the up end of lower anchor clamps be provided with boss matched with recess, and clearance fit between the two, anchor clamps are connected through fastening bolt 12 under with between the anchor clamps on it to exert the pretightning force to the sample that awaits measuring, effectively prevent that the sample from taking place relative slip and causing the test result accuracy to reduce between test procedure and anchor clamps, effectively guarantee that miniature sample can not take place the relative slip beyond the deformation at the test procedure, improve the measuring accuracy.
The upper end of the quartz rod is in contact with the center of the ground of the sample to be measured, and the quartz rod is matched with the displacement sensor, so that the change of the central deflection of the sample to be measured is directly measured, the measurement is more accurate compared with the measurement of the downward displacement of the punch rod, and the test error is reduced.
The punch 3 is of a stepped structure, so that the possibility of strength reduction of the punch 3 caused by stress concentration is effectively reduced.
The punch 3 is provided with a water cooling channel, so that the punch 3 is effectively prevented from generating thermal deformation during high-temperature testing, and the accuracy of a testing result is improved.
The gas protection system adopts 99.9% argon as the protective gas during the test, can prevent the surface oxidation of miniature sample during the test, the required precision when guaranteeing the sample test.
The utility model discloses a concrete test process does:
1) the test sample to be tested is placed on the lower clamp, the lower clamp and the upper clamp are connected through the fastening bolt 12, and meanwhile pre-tightening force is exerted, so that the test sample to be tested cannot slide with the clamps in the test process.
2) The temperature required by the test is set, and protective gas is introduced before heating is started, so that the test accuracy is prevented from being influenced by the oxidation of the sample to be tested in a high-temperature environment.
3) And (3) preserving the temperature of the sample to be tested for 1-2 hours at the required temperature, then starting to apply a load, and simultaneously starting to record the displacement data of the central position of the sample to be tested until the sample breaks.
4) And outputting the displacement-time curve recorded by the displacement recorder, and performing equivalent transformation and analysis on the curve to finally obtain the creep performance parameters of the material.
Claims (8)
1. A creep property testing device for a heat-resistant steel micro-sample for a power station is characterized by comprising a supporting seat (2), a punch rod (3), an upper cross beam (10), a quartz tube (11), a lower cross beam, an open tubular furnace (4), a quartz rod (15), a displacement sensor (7), a supporting base (8) and a displacement recorder;
weights (1) are placed on the supporting seat (2), the upper end of a punch rod (3) is connected with the supporting seat (2), the lower end of the punch rod (3) penetrates through an upper cross beam (10) and is inserted into a quartz tube (11), the upper end of the quartz tube (11) is fixed on the upper cross beam (10), the lower end of the quartz tube (11) is fixed on a lower cross beam, an open tube furnace (4) is sleeved on the outer side of the quartz tube (11), a clamp (5) is arranged in the quartz tube (11), the clamp (5) comprises an upper clamp and a lower clamp, a sample to be tested is clamped between the upper clamp and the lower clamp, the lower end of the punch rod (3) penetrates through the lower clamp and is contacted with the central position of the upper surface of a sample to be tested, the upper end of a quartz rod (15) is contacted with the central position of the bottom of the sample to be tested, and the lower end of the quartz rod (15) penetrates through the lower clamp and is matched with a displacement sensor (7), the displacement sensor (7) is positioned on the supporting base (8), and the output end of the displacement sensor (7) is connected with the displacement recorder.
2. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, wherein the quartz tube (11) is connected with the upper beam (10) and the lower beam through the flange (6) and the bolt.
3. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, wherein the upper clamp and the lower clamp are connected by a fastening bolt (12).
4. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, further comprising a ceramic tube (13), wherein the ceramic tube (13) is positioned in the quartz tube (11), the lower end of the ceramic tube (13) is fixed on the lower beam, and the upper end of the ceramic tube (13) is fixed on the lower clamp.
5. The creep property testing device for the heat-resistant steel micro-specimen for a power station according to claim 1, further comprising a K-type thermocouple (14) for detecting the temperature in the quartz tube (11), wherein the K-type thermocouple (14) is connected to the open tube furnace (4).
6. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, characterized by further comprising a sleeve (9), wherein the sleeve (9) penetrates through the upper cross beam (10), and a sliding bearing is arranged between the sleeve (9) and the punch (3).
7. The creep property testing device for the heat-resistant steel micro-specimen for the power station as claimed in claim 1, further comprising a gas protection system, wherein the gas protection system is communicated with the quartz tube (11).
8. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, wherein the displacement sensor (7) is fixed on the supporting base (8) through a magnetic base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120484701.2U CN214408469U (en) | 2021-03-05 | 2021-03-05 | Creep property testing device for heat-resistant steel micro-sample for power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120484701.2U CN214408469U (en) | 2021-03-05 | 2021-03-05 | Creep property testing device for heat-resistant steel micro-sample for power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214408469U true CN214408469U (en) | 2021-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120484701.2U Active CN214408469U (en) | 2021-03-05 | 2021-03-05 | Creep property testing device for heat-resistant steel micro-sample for power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214408469U (en) |
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2021
- 2021-03-05 CN CN202120484701.2U patent/CN214408469U/en active Active
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