CN113358460A - Axial high-temperature creep test fixture and equipment - Google Patents
Axial high-temperature creep test fixture and equipment Download PDFInfo
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- CN113358460A CN113358460A CN202110614305.1A CN202110614305A CN113358460A CN 113358460 A CN113358460 A CN 113358460A CN 202110614305 A CN202110614305 A CN 202110614305A CN 113358460 A CN113358460 A CN 113358460A
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- 238000012360 testing method Methods 0.000 title claims abstract description 111
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000005253 cladding Methods 0.000 abstract description 20
- 239000000446 fuel Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 4
- 239000000306 component Substances 0.000 description 11
- 238000005259 measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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Abstract
The invention discloses an axial high-temperature creep test fixture and equipment thereof, belonging to the technical field of axial high-temperature creep tests, wherein the axial high-temperature creep test fixture comprises a fixture body, wherein the fixture body is provided with tapered holes penetrating through two ends of the fixture body; the clamping assembly is arranged in the conical hole, the outer wall of the clamping assembly is attached to the inner wall of the conical hole, and the clamping assembly is provided with a first through hole penetrating through two ends of the clamping assembly; the pipe plug is arranged in the first through hole and is used for being plugged into the pipe body to be tested; the pressing assembly is connected to one end of the clamp body and can extrude the clamping assembly to move towards the small-diameter end of the conical hole in the conical hole, so that the clamping assembly and the pipe plug clamp the pipe body to be tested. The axial high-temperature creep test fixture disclosed by the invention can be used for clamping a pipe body to be tested in the axial high-temperature creep test process, and has higher reliability, so that more accurate axial high-temperature creep test data of the fuel cladding pipe can be obtained.
Description
Technical Field
The invention relates to the technical field of axial high-temperature creep tests, in particular to an axial high-temperature creep test clamp and equipment thereof.
Background
The fuel cladding is the core component of the nuclear power plant operation and also the first barrier to ensure nuclear safety, and is directly related to the safety and reliability of the nuclear fuel assembly in the nuclear reactor. The fuel cladding tube is subjected to high temperature, radiation, axial stress, hoop stress and other damages caused by nuclear fuel fission for a long time under the service working condition. The axial high-temperature creep performance is an important index for evaluating whether the cladding tube can meet the safe use requirement under the service working condition, so that the axial high-temperature creep test is usually required to be carried out on the cladding tube when the fuel cladding tube is developed so as to obtain the axial creep performance data of the fuel cladding tube under the high-temperature service environment.
The fuel cladding is typically of a smaller diameter depending on the fuel assembly design, the fuel cladding being of a very thin wall thickness and being a tube of different alloy composition. Illustratively, the fuel cladding for the third generation nuclear power is typically a zirconium alloy tube having an outer diameter of 9.5 mm and a wall thickness of 0.57 mm, and the fuel cladding for the fourth generation nuclear power is typically a stainless steel alloy tube having an outer diameter of 6 mm and a wall thickness of 0.5 mm. Axial high temperature creep test equipment among the prior art only can directly test round bar form sample and plate form sample, and need realize the loading of test stress through screw thread or pin at experimental in-process, and the wall thickness of fuel cladding pipe is thinner, can't carry out the loading of test stress through the mode of seting up screw thread or big pin hole at fuel cladding pipe outer wall for can't directly carry out axial high temperature creep test to fuel cladding pipe through axial creep test equipment, and then can't obtain accurate fuel cladding pipe axial high temperature creep test data.
Disclosure of Invention
The invention aims to provide an axial high-temperature creep test fixture which can clamp a pipe body to be tested in the axial high-temperature creep test process.
The invention also aims to provide axial high-temperature creep test equipment which can be used for carrying out axial high-temperature creep test on a pipe body to be tested, so that more accurate axial high-temperature creep test data of the fuel cladding pipe can be obtained.
As the conception, the technical scheme adopted by the invention is as follows:
an axial high temperature creep test fixture, comprising:
the clamp comprises a clamp body, a clamping piece and a clamping piece, wherein the clamp body is provided with tapered holes penetrating through two ends of the clamp body;
the clamping assembly is arranged in the conical hole, the outer wall of the clamping assembly is attached to the inner wall of the conical hole, and the clamping assembly is provided with a first through hole penetrating through two ends of the clamping assembly;
the pipe plug is arranged in the first through hole and is used for being plugged into the pipe body to be tested;
and the pressing assembly is connected to one end of the clamp body and can extrude the clamping assembly to move towards the small-diameter end of the tapered hole in the tapered hole, so that the clamping assembly and the pipe plug clamp the pipe body to be tested.
Optionally, the clamping assembly includes at least two taper blocks, an outer wall of each taper block fits an inner wall of the tapered hole, and the inner walls of the at least two taper blocks surround to form the first through hole.
Optionally, the taper of the tapered hole is 1: 4; the taper block is a part of the preset circular truncated cone, and the taper of the preset circular truncated cone is 1: 4.
Optionally, the clamping assembly is of a circular truncated cone-shaped structure or a truncated pyramid-shaped structure, and the clamping assembly is made of an elastic material.
Optionally, the pressing assembly includes an adapter and a pressing block, one end of the adapter is connected to one end of the fixture body, a groove is formed in an end portion of one end of the adapter, the pressing block is located in the groove, one end of the pressing block abuts against a groove wall of the groove, and the other end of the pressing block abuts against the clamping assembly.
Optionally, a groove wall of the groove is provided with a first thread, one end of the clamp body is provided with a second thread, and the adapter is in threaded connection with the clamp body through the screwed first thread and the screwed second thread.
Optionally, the pipe plug further comprises a bump fixedly connected to the end of the pipe plug, the cross-sectional size of the bump is larger than that of the first through hole, the bump is connected with the end face of the pipe plug and abuts against the clamping assembly, and the pressing block abuts against the end face of the bump far away from the pipe plug.
Optionally, the fixture further comprises a connecting piece connected to the other end of the fixture body, a boss for connecting a deformation measurement extension rod of the axial high-temperature creep test equipment is arranged on the outer wall of the connecting piece, and the connecting piece is provided with a second through hole communicated with the first through hole.
An axial high temperature creep test apparatus comprising: load loading device and two as above axial high temperature creep test fixture, two loading ends and two of load loading device axial high temperature creep test fixture compress tightly the subassembly one-to-one, and every the loading end connect rather than corresponding compress tightly the subassembly, one axial high temperature creep test fixture is used for pressing from both sides the one end of waiting to test the body, another axial high temperature creep test fixture is used for pressing from both sides the other end of waiting to test the body.
Optionally, when the axial high-temperature creep test fixture includes a connecting piece, the axial high-temperature creep test apparatus further includes a deformation measurement extension rod and a deformation sensor, and the deformation measurement extension rod is connected between the boss on the connecting piece and the deformation sensor.
The invention has at least the following beneficial effects:
the axial high-temperature creep test fixture and the device thereof provided by the invention have the advantages that the pipe plug is plugged into the pipe body to be tested, and is contacted with the inner wall of the pipe body to be tested, the inner wall of the clamping component is contacted with the outer wall of the pipe body to be tested, and the clamping component can move in the tapered hole under the driving of the pressing component, due to the characteristics of the conical hole structure, the clamping assembly is extruded by the inner wall of the conical hole, so that the clamping assembly and the pipe plug can clamp the pipe body to be tested, the pipe body to be tested is clamped by the mode that the taper of the conical hole is matched with the taper of the clamping assembly, so that the load loading device in the axial creep test equipment can load stress on the pipe body to be tested through the axial high-temperature creep test fixture, and then be convenient for treat the experimental body and carry out the axial high temperature creep test to can obtain more accurate fuel cladding pipe axial high temperature creep test data.
The axial high-temperature creep test fixture provided by the invention is simple in structure, convenient to install, simple to operate and capable of being repeatedly used, and the cost of the axial high-temperature creep test is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of an axial high temperature creep test fixture provided in an embodiment of the present invention;
FIG. 2 is a schematic view of a clamping assembly according to an embodiment of the present invention when the clamping assembly is not clamping a tubular body to be tested;
FIG. 3 is a schematic view of a clamping assembly for clamping a tubular body to be tested according to an embodiment of the present invention;
FIG. 4 is a schematic view of another clamping assembly according to an embodiment of the present invention when the clamping assembly is not clamping a tubular body to be tested;
FIG. 5 is a first schematic structural diagram of an axial high-temperature creep test apparatus provided in an embodiment of the present invention;
FIG. 6 is a schematic structural diagram II of an axial high-temperature creep test apparatus provided in an embodiment of the present invention;
FIG. 7 is a graph of axial creep deformation at high temperature versus test time for a pipe to be tested according to an embodiment of the present invention.
In the figure:
1. a clamp body; 11. a tapered hole; 2. a clamping assembly; 21. a first through hole; 22. a taper block; 3. a pipe plug; 31. chamfering; 4. a compression assembly; 41. a crossover sub; 411. a groove; 42. a compression block; 5. a bump; 6. a connecting member; 61. a boss; 62. a second through hole; 10. a deformation measuring extension rod; 20. a deformation sensor;
100. and (5) a pipe body to be tested.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides an axial high temperature creep test clamp for fixed body 100 of waiting to test of centre gripping has higher stability in the axial creep test process, can be convenient for axial creep test equipment directly treats body 100 of waiting to test and tests, and then can obtain axial high temperature creep test data and the axial high temperature creep test data that obtains are more accurate. Illustratively, the tubular body 100 to be tested may be a fuel cladding tube.
As shown in fig. 1 to 4, the axial high-temperature creep test fixture comprises a fixture body 1, a clamping assembly 2, a pipe plug 3 and a pressing assembly 4.
Wherein, the clamp body 1 has tapered holes 11 penetrating through both ends thereof, and the tapered holes 11 are holes whose cross-sectional areas gradually decrease along the length direction of the clamp body 1. The tapered hole 11 may be, for example, a conical hole or a pyramidal hole, which is not limited in this embodiment.
The clamping assembly 2 is arranged in the tapered hole 11, and the outer wall of the clamping assembly 2 is attached to the inner wall of the tapered hole 11, that is, the outline of the clamping assembly 2 is matched with the outline of the tapered hole 11, that is, the outline of the clamping assembly 2 is tapered, so that the clamping assembly 2 can be matched with the clamp body 1 to clamp the pipe body 100 to be tested. And, the clamping assembly 2 has a first through hole 21 penetrating through both ends thereof, the first through hole 21 being used for the pipe body 100 to be tested to pass through.
As shown in fig. 1, the plug 3 is disposed in the first through hole 21, and the plug 3 is used for being plugged into the pipe body 100 to be tested, so that the pipe wall of the pipe body 100 to be tested can be clamped between the inner wall of the clamping assembly 2 and the outer wall of the plug 3. The compressing assembly 4 is connected to one end of the fixture body 1, and the compressing assembly 4 can move relative to one end of the fixture body 1, so that the compressing assembly 4 can extrude the clamping assembly 2 to move towards the small-diameter end of the tapered hole 11 in the tapered hole 11, the inner diameter of the first through hole 21 is gradually reduced, and the clamping assembly 2 and the pipe plug 3 clamp the pipe body 100 to be tested. The small diameter end of the tapered hole 11 is the end of the tapered hole 11 with a smaller diameter, and in fig. 1, the small diameter end of the tapered hole 11 is the bottom end of the tapered hole 11.
In the axial high-temperature creep test fixture provided by this embodiment, the plug 3 is plugged into the pipe body 100 to be tested, and is contacted with the inner wall of the pipe body 100 to be tested, the inner wall of the clamping component 2 is contacted with the outer wall of the pipe body 100 to be tested, and the clamping component 2 can move in the tapered hole 11 under the driving of the pressing component 4, due to the structural characteristics of the tapered hole 11, the clamping assembly 2 is pressed by the inner wall of the tapered hole 11, thereby enabling the clamping component 2 and the pipe plug 3 to clamp the pipe body 100 to be tested, realizing the clamping of the pipe body 100 to be tested by means of matching the taper of the tapered hole 11 and the taper of the clamping component 2, so that the load loading device in the axial creep test equipment can load stress to the pipe body 100 to be tested through the axial high-temperature creep test fixture, and then, the axial high-temperature creep test of the pipe body 100 to be tested is conveniently carried out, so that more accurate axial high-temperature creep test data of the fuel cladding pipe can be obtained.
In the present embodiment, the outer shape of the plug 3 is adapted to the pipe hole profile of the pipe body 100 to be tested, and the plug 3 may be cylindrical, prismatic, conical, and the like. Preferably, the outer diameter of the plug 3 is equal to the inner diameter of the pipe body 100 to be tested, so that the plug 3 can effectively fill and support the pipe body 100 to be tested. In addition, in this embodiment, one end of the plug 3, which is used for extending into the pipe body 100 to be tested, is provided with the chamfer 31, so that the size of one end of the plug 3 can be smaller, and then the end of the plug 3 can be aligned to the port of the pipe body 100 to be tested, and therefore the plug 3 can be plugged into the pipe body 100 to be tested more conveniently.
In the present embodiment, the structure of the clamping assembly 2 may be various, and the present embodiment provides the following two specific structures of the clamping assembly 2.
In one particular construction of the clamping assembly 2, as shown in fig. 2-4, the clamping assembly 2 includes at least two tapered blocks 22. Fig. 2 and 3 are schematic diagrams of the clamping assembly 2 including two taper blocks 22, fig. 2 is a schematic diagram of the clamping assembly 2 not clamping the tubular body 100 to be tested, and fig. 3 is a schematic diagram of the clamping assembly 2 clamping the tubular body 100 to be tested; fig. 4 is a schematic view of the clamping assembly 2 including four tapered blocks 22. When the clamping assembly 2 clamps the pipe body 100 to be tested, as shown in fig. 3, the outer wall of each taper block 22 is attached to the inner wall of the taper hole 11, that is, the outer wall of each taper block 22 is closely attached to the clamp body 1, at least two taper blocks 22 are arranged along the circumference of the taper hole 11, and the inner walls of at least two taper blocks 22 are mutually matched and surround to form the first through hole 21. It should be noted that the at least two taper blocks 22 in the present embodiment are understood that the taper blocks 22 have two or more. Illustratively, the inner wall of each tapered block 22 is arc-shaped to form the first through hole 21 with a circular cross section, and it is understood that the inner wall of each tapered block 22 may also be a plane to form the first through hole 21 with a polygonal cross section.
In this embodiment, when the to-be-tested tube body 100 is not clamped by at least two taper blocks 22, as shown in fig. 2 or fig. 4, a gap exists between two adjacent taper blocks 22 in the circumferential direction of the taper hole 11, and the inner wall of the taper block 22 is not tightly attached to the outer wall of the to-be-tested tube body 100, in the process that the pressing component 4 pushes the taper block 22 to move close to the small-diameter end of the taper hole 11, the space of the taper hole 11 is gradually reduced, so that the at least two taper blocks 22 are squeezed by the inner wall of the taper hole 11, and further, the two adjacent taper blocks 22 are close to each other until being abutted, at this time, the inner wall of the taper block 22 is tightly attached to the outer wall of the to-be-tested tube body 100, so as to mutually cooperate with the tube plug 3 to clamp the to-be-tested tube body 100. The taper block 22 is a structure with one end thicker than the other end, and the outer wall of the taper block 22 is an inclined outer wall.
Further, in the present embodiment, the taper of the tapered hole 11 is 1:4, and accordingly, the taper block 22 is a part of the preset circular truncated cone, and the taper of the preset circular truncated cone is 1:4, so that while a large movement space of the taper block 22 is ensured, sufficient friction force can be generated between the clamp body 1 and the taper block 22, and further, the taper block 22 does not fall off from the tapered hole 11.
In a concrete structure of clamping unit 2, clamping unit 2 is round platform column structure or terrace with edge column structure that has first through-hole 21, that is, clamping unit 2 is an overall structure, and clamping unit 2's material is elastic material, make pressure component 4 promote the in-process that the path end that tapering piece 22 is close to bell mouth 11 removed, clamping unit 2 takes place elastic deformation, and then make clamping unit 2's inner wall hug closely in the outer wall of waiting to test body 100, and then produce great frictional force with the outer wall of waiting to test body 100, thereby realize mutually supporting with stopcock 3 and press from both sides tightly waiting to test body 100.
The clamping assembly 2 with the two structures can clamp the pipe body 100 to be tested and has a good clamping effect.
Optionally, as shown in fig. 1, the pressing assembly 4 includes an adapter 41 and a pressing block 42. Wherein, one end of the adapter 41 is connected to one end of the fixture body 1, and the connection position of the adapter 41 at one end of the fixture body 1 is changeable, and the end of one end of the adapter 41 is provided with the groove 411, the pressing block 42 is located in the groove 411, and one end of the pressing block 42 abuts against the groove wall of the groove 411, and the other end of the pressing block 42 abuts against the clamping assembly 2, and when the adapter 41 moves relative to one end of the fixture body 1, the pressing block 42 can be pushed to move towards the small diameter end of the tapered hole 11, so that the pressing block 42 can push the clamping assembly 2 to move towards the small diameter end of the tapered hole 11. The abutment in this embodiment may be direct contact, fixed connection or indirect contact.
For example, referring to fig. 1, the length of the clamping assembly 2 is smaller than the length of the fixture body 1, so that when the clamping assembly 2 is located in the tapered hole 11, a gap exists between an end surface of one end of the clamping assembly 2 and an end surface of one end of the fixture body 1, and then one end of the fixture body 1 is provided with an accommodating groove formed by the clamping assembly 2 and an inner wall of the tapered hole 11, the accommodating groove and the groove 411 form an accommodating space, and the pressing block 42 is located in the accommodating space.
Further, the adapter 41 is screwed with one end of the fixture body 1, specifically, the groove wall of the groove 411 has a first thread, the outer wall of one end of the fixture body 1 has a second thread, the adapter 41 is screwed with the fixture body 1 through the screwed first thread and second thread, and the clamping block 42 can be pushed to gradually move close to the small diameter end of the tapered hole 11 by rotating the connector 41. In some embodiments, the groove walls of the recess 411 include an inclined wall for abutment with the hold-down block 42 and a vertical wall having a first thread to facilitate mating with the clamp body 1.
Optionally, as shown in fig. 1, the axial high temperature creep test fixture further includes a protrusion 5 fixed to an end of the pipe plug 3, and the pressing block 42 abuts against the clamping assembly 2 and the pipe plug 3 through the protrusion 5. Specifically, the bump 5 is located outside the first through hole 21, and the cross-sectional dimension of the bump 5 is larger than the cross-sectional dimension of the first through hole 21, the end face of the bump 5 connected to the plug 3 abuts against the clamping component 2, and the pressing block 42 abuts against the end face of the bump 5 away from the plug 3. The setting of lug 5 for axial high temperature creep test fixture when not using, stopcock 3 also can be arranged in first through-hole 21, and then can prevent that stopcock 3 from losing.
In this embodiment, referring to fig. 1, the axial high-temperature creep test fixture further includes a connecting member 6 connected to the other end of the fixture body 1. The outer wall of connecting piece 6 is equipped with the boss 61 that is used for connecting the deformation measurement extension rod 10 of axial high temperature creep test equipment, and connecting piece 6 has the second through-hole 62 that communicates in first through-hole 21, and second through-hole 62 is used for supplying to wait to test body 100 to wear to establish. Exemplarily, the connecting member 6 is a block structure, and one end of the connecting member 6 has a connecting groove, and an inner wall of the connecting groove has a thread, so that the connecting member 6 is in threaded connection with the other end of the fixture body 1 through the connecting groove, thereby facilitating the detachment of the connecting member 6 from the fixture body 1.
The axial high-temperature creep test fixture provided by the embodiment is simple in structure, convenient to install, simple to operate and reusable, and reduces the cost of the axial high-temperature creep test.
The embodiment also provides an axial high-temperature creep test device, which can be used for performing an axial high-temperature creep test on the pipe body 100 to be tested.
As shown in fig. 5 and 6, the axial high temperature creep test apparatus includes a load loading device and two axial high temperature creep test jigs as described above. Wherein, two loading ends of load loading device and the 4 one-to-one correspondence of the subassembly that compresses tightly of two axial high temperature creep test anchor clamps, and every loading end connect in the subassembly 4 that compresses tightly rather than corresponding to, to through compressing tightly subassembly 4 to waiting to test body 100 loading stress, and, an axial high temperature creep test anchor clamps are used for pressing from both sides the one end of treating test body 100, and another axial high temperature creep test anchor clamps are used for pressing from both sides the other end of treating test body 100.
Further, when the axial high-temperature creep test fixture comprises the connecting piece 6, the axial high-temperature creep test equipment further comprises a deformation measurement extension rod 10 and a deformation sensor 20, wherein the deformation measurement extension rod 10 is connected between the boss 61 on the connecting piece 6 and the deformation sensor 20 and is used for assisting the deformation sensor 20 in measuring the creep deformation of the pipe body 100 to be tested. By way of example, by measuring the relative displacement between the two bosses 61 in the two axial high-temperature creep test fixtures, creep test data in the axial deformation gauge length section of the pipe body 100 to be tested can be obtained.
Optionally, a plurality of deformation sensors 20 are provided, and each deformation sensor 20 is connected with two deformation measuring extension rods 10, one of the two deformation measuring extension rods 10 is connected with one boss 61 of one axial high-temperature creep test fixture, and the other of the two deformation measuring extension rods 10 is connected with one boss 61 of the other axial high-temperature creep test fixture.
The use method of the axial high-temperature creep test equipment provided by the embodiment is as follows:
the pipe body 100 to be tested is cut to a certain proper length, the two pipe plugs 3 are respectively plugged into the two ends of the pipe body 100 to be tested, and the convex blocks 5 connected with the pipe plugs 3 are flush with the end faces of the pipe body 100 to be tested. One end of the pipe body 100 to be tested is clamped and inserted into the clamp body 1 by the taper blocks 22, then the pressing block 42 is put on, the adapter 41 is slowly screwed, and the plurality of taper blocks 22 are slowly pushed by the adapter 41 to gradually clamp one end of the pipe body 100 to be tested. After clamping one end of the tube body 100 to be tested, next, the connecting member 6 is slidably fitted into the tube body 100 to be tested. And then clamping the other end of the pipe body 100 to be tested by using a set of taper blocks 22 of the axial high-temperature creep test fixture, inserting the other end of the pipe body 100 to be tested into the fixture body 1, putting a pressing block 42 on the fixture body, slowly screwing the adapter 41, and gradually clamping the other end of the pipe body 100 to be tested by using the taper blocks 22 under the slow pushing of the adapter 41.
After clamping the two ends of the pipe body 100 to be tested, measuring the size between the two clamp bodies 1 by using a vernier caliper, wherein the size is the creep deformation gauge length of the pipe body 100 to be tested. And finally, screwing the connecting pieces 6 respectively until the whole set of axial high-temperature creep test fixture is installed. Connecting the two adapter joints 41 with the two loading ends of the load loading device, then installing the deformation measuring extension rod 10 and the deformation sensor 20, binding a thermocouple, and closing the heating furnace.
TABLE 1
Heating the sample to the specified test temperature of 650 ℃, and after preserving the heat for a certain period of time, starting to load the stress on the pipe body 100 to be tested. The creep deformation data of the pipe body 100 to be tested, which is automatically recorded by the deformation sensor 20 of the axial high-temperature creep test equipment, is drawn according to the recorded deformation data, such as the curve of the high-temperature axial creep deformation-test time of the pipe body 100 to be tested shown in fig. 7, and the high-temperature axial creep performance data of the pipe body 100 to be tested, which is shown in table 1, is obtained through calculation according to the creep deformation gauge length measured before the test and the fig. 7. Table 1 shows the test results of the fuel cladding under the first stress, the second stress and the third stress at the predetermined temperature T.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an axial high temperature creep test fixture which characterized in that includes:
the clamp comprises a clamp body (1), wherein the clamp body (1) is provided with tapered holes (11) penetrating through two ends of the clamp body;
the clamping assembly (2) is arranged in the conical hole (11), the outer wall of the clamping assembly (2) is attached to the inner wall of the conical hole (11), and the clamping assembly (2) is provided with a first through hole (21) penetrating through two ends of the clamping assembly;
the pipe plug (3) is arranged in the first through hole (21), and the pipe plug (3) is used for being plugged into a pipe body to be tested;
the pressing component (4) is connected to one end of the clamp body (1), and the pressing component (4) can extrude the clamping component (2) to move towards the small-diameter end of the tapered hole (11) in the tapered hole (11), so that the clamping component (2) and the pipe plug (3) clamp the pipe body to be tested.
2. The axial high-temperature creep test fixture according to claim 1, characterized in that the clamping assembly (2) comprises at least two tapered blocks (22), the outer wall of each tapered block (22) fits the inner wall of the tapered hole (11), and the inner walls of at least two tapered blocks (22) surround and form the first through hole (21).
3. The axial high temperature creep test fixture of claim 2, wherein the taper of the tapered bore (11) is 1: 4; the taper block (22) is a part of a preset circular truncated cone, and the taper of the preset circular truncated cone is 1: 4.
4. The axial high-temperature creep test fixture according to claim 1, characterized in that the clamping assembly (2) is of a truncated cone-shaped structure or a truncated pyramid-shaped structure, and the material of the clamping assembly (2) is an elastic material.
5. The axial high-temperature creep test fixture according to any one of claims 1-4, characterized in that the compression assembly (4) comprises a conversion joint (41) and a compression block (42), one end of the conversion joint (41) is connected to one end of the fixture body (1), the end of one end of the conversion joint (41) is provided with a groove (411), the compression block (42) is located in the groove (411), one end of the compression block (42) abuts against the groove wall of the groove (411), and the other end of the compression block (42) abuts against the clamping assembly (2).
6. The axial high-temperature creep test fixture as claimed in claim 5, wherein the groove wall of the groove (411) has a first thread, one end of the fixture body (1) has a second thread, and the adapter (41) is screwed with the fixture body (1) through the first thread and the second thread.
7. The axial high-temperature creep test fixture according to claim 5, further comprising a protrusion (5) fixed to an end of the pipe plug (3), wherein a cross-sectional dimension of the protrusion (5) is larger than a cross-sectional dimension of the first through hole (21), the protrusion (5) is connected to an end face of the pipe plug (3) and abuts against the clamping component (2), and the pressing block (42) abuts against an end face of the protrusion (5) far away from the pipe plug (3).
8. The axial high-temperature creep test fixture according to any one of claims 1 to 4, further comprising a connecting member (6) connected to the other end of the fixture body (1), wherein the outer wall of the connecting member (6) is provided with a boss (61) for connecting a deformation measuring extension rod (10) of an axial high-temperature creep test apparatus, and the connecting member (6) has a second through hole (62) communicated with the first through hole (21).
9. An axial high temperature creep test apparatus, comprising: the axial high-temperature creep test device comprises a load loading device and two axial high-temperature creep test clamps according to any one of claims 1 to 8, wherein two loading ends of the load loading device correspond to the compression assemblies (4) of the two axial high-temperature creep test clamps one by one, each loading end is connected to the corresponding compression assembly (4), one axial high-temperature creep test clamp is used for clamping one end of the pipe body to be tested, and the other axial high-temperature creep test clamp is used for clamping the other end of the pipe body to be tested.
10. The axial high temperature creep test apparatus according to claim 9, wherein when the axial high temperature creep test jig includes a connecting member (6), the axial high temperature creep test apparatus further includes a deformation measuring reach bar (10) and a deformation sensor (20), the deformation measuring reach bar (10) is connected between a boss (61) on the connecting member (6) and the deformation sensor (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110614305.1A CN113358460A (en) | 2021-06-02 | 2021-06-02 | Axial high-temperature creep test fixture and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110614305.1A CN113358460A (en) | 2021-06-02 | 2021-06-02 | Axial high-temperature creep test fixture and equipment |
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| CN113358460A true CN113358460A (en) | 2021-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114157077A (en) * | 2021-11-28 | 2022-03-08 | 陕西华燕航空仪表有限公司 | Design method for motor shaft system structure of electromechanical gyroscope |
| CN114486486A (en) * | 2022-01-10 | 2022-05-13 | 中国原子能科学研究院 | Testing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630447A (en) * | 2013-11-29 | 2014-03-12 | 沈阳黎明航空发动机(集团)有限责任公司 | High-temperature tensile testing method for whole metal pipe and special fixture used in high-temperature tensile testing method |
| CN104374361A (en) * | 2013-08-12 | 2015-02-25 | 中航试金石检测科技有限公司 | Plate creep extensometer |
| CN106644700A (en) * | 2016-11-18 | 2017-05-10 | 西北工业大学 | Small sample fixture for creepage of plate high-temperature alloy |
| CN207894727U (en) * | 2017-12-14 | 2018-09-21 | 中国航发沈阳发动机研究所 | A kind of small sample high-temerature creep experiment clamping device |
| CN110806348A (en) * | 2019-11-28 | 2020-02-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Clamp and method suitable for high-temperature stretching detection of small-specification metal pipe |
| CN111829874A (en) * | 2020-07-24 | 2020-10-27 | 中国核动力研究设计院 | Clamp and test method for zirconium tube fatigue test |
-
2021
- 2021-06-02 CN CN202110614305.1A patent/CN113358460A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374361A (en) * | 2013-08-12 | 2015-02-25 | 中航试金石检测科技有限公司 | Plate creep extensometer |
| CN103630447A (en) * | 2013-11-29 | 2014-03-12 | 沈阳黎明航空发动机(集团)有限责任公司 | High-temperature tensile testing method for whole metal pipe and special fixture used in high-temperature tensile testing method |
| CN106644700A (en) * | 2016-11-18 | 2017-05-10 | 西北工业大学 | Small sample fixture for creepage of plate high-temperature alloy |
| CN207894727U (en) * | 2017-12-14 | 2018-09-21 | 中国航发沈阳发动机研究所 | A kind of small sample high-temerature creep experiment clamping device |
| CN110806348A (en) * | 2019-11-28 | 2020-02-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Clamp and method suitable for high-temperature stretching detection of small-specification metal pipe |
| CN111829874A (en) * | 2020-07-24 | 2020-10-27 | 中国核动力研究设计院 | Clamp and test method for zirconium tube fatigue test |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114157077A (en) * | 2021-11-28 | 2022-03-08 | 陕西华燕航空仪表有限公司 | Design method for motor shaft system structure of electromechanical gyroscope |
| CN114157077B (en) * | 2021-11-28 | 2023-08-04 | 陕西华燕航空仪表有限公司 | Motor shafting structure design method of electromechanical gyroscope |
| CN114486486A (en) * | 2022-01-10 | 2022-05-13 | 中国原子能科学研究院 | Testing device |
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Application publication date: 20210907 |