CN204924790U - System for metal specimen meets an emergency among real -time supervision high temperature and high pressure environment - Google Patents

Abstract

The utility model provides a system for metal specimen meets an emergency among real -time supervision high temperature and high pressure environment, this system include two sets of coupling assembling systems, the two sets of displacement sensing system and data acquisition system, carry out real -time supervision metal specimen when meeting an emergency, when metal specimen receives the axial force among the high temperature and high pressure environment in the autoclave, the extension takes place or shortens the deformation for the metal in the gauge length, its deflection transmits the response iron core through the coupling assembling system that is fixed in on the metal specimen, the displacement of response iron core can be sensed to the inductance type extensometer, and send the signal of telecommunication, signal amplifier enlargies the signal of telecommunication, signal collector gathers the signal of telecommunication after enlargeing, and the displacement that calculates two coupling assembling systems is poor, divided by original gauge length segment length, meet an emergency for metal specimen promptly. The utility model overcomes can't be in high temperature and high pressure environment among the prior art difficult problem of real -time straingauging, higher measurement accuracy has moreover, can satisfy mechanics chemistry interaction test requirement among the various high temperature and high pressure environment.

Description

A system for real-time monitoring of metal sample strain in high temperature and high pressure environment

Technical field:

The utility model belongs to the field of experimental research of metal materials in a high-temperature and high-pressure environment, in particular to a system for real-time monitoring of the strain of a metal sample in a high-temperature and high-pressure environment.

Background technique:

Mechanochemical interaction cracking (such as stress corrosion, corrosion fatigue) of metal materials in high temperature and high pressure environment is an important problem in many fields. Typical examples such as nuclear power plant circulation loops and steam generator heat transfer tubes, thermal power plant boiler water walls, and pressure vessels in the petrochemical industry often cause safety accidents due to stress corrosion or corrosion fatigue of materials. Therefore, simulation in the laboratory It is of great significance to study the mechanical and chemical interaction of metal materials in high temperature and high pressure environment. To carry out such research, it is first necessary to be able to accurately monitor the actual strain of the sample in a high temperature and high pressure environment, otherwise the accuracy of the experimental results cannot be guaranteed. However, traditional strain extensometers, such as gauge extensometers, lever extensometers, and Martin instruments, cannot be used in high temperature and high pressure environments.

The current test method is to use the displacement value of the loading axis to estimate the strain value of the gauge length section of the test sample (refer to the Chinese invention patent, patent application number: 201310452061.7, the name of the invention: a slow tensile test device with high temperature and high pressure circulating water and using method), however, this method has the following disadvantages: first, the gap between the loading shaft and the fixture, and the fixture and the sample is ignored during the test, resulting in the estimated strain value being often greater than the actual strain value; secondly, under high temperature and high pressure In the environment, both the loading shaft and the fixture will be deformed due to the action of temperature and pressure, resulting in a large gap between the measured displacement value of the loading shaft and the actual sample strain value. Therefore, how to accurately, reliably and easily measure the strain of a metal sample in a high temperature and high pressure environment has become an urgent problem to be solved in this test field.

Utility model content:

The purpose of the utility model is to provide a system for real-time monitoring of the strain of a metal sample in a high-temperature and high-pressure environment, so as to solve the problems in the prior art that the strain cannot be monitored in real time and the accuracy of strain measurement is not enough.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A system for real-time monitoring of the strain of a metal sample in a high temperature and high pressure environment, including two sets of connecting component systems, two sets of displacement sensing systems and a data acquisition system; wherein,

Each connecting component system includes metal ohmic clips, connecting screws, fixed steering components and induction cores, each displacement sensing system includes inductive extensometers, and the data acquisition system includes signal amplifiers and signal collectors;

Both sets of connecting component systems are set in the autoclave, in which two metal ohmic clips are respectively clamped at both ends of the metal sample, and each metal ohmic clip is connected to one end of a connecting screw, and the two connecting screws The other ends are connected to one end of an induction iron core through a fixed steering assembly, and the other ends of the two induction iron cores protrude out of the autoclave;

Two sets of displacement sensing systems and data acquisition systems are set outside the autoclave. Two inductive extensometers are respectively connected to the other ends of the two inductive iron cores. The two inductive extensometers are connected with the signal amplifier, signal acquisition connected to the device.

The further improvement of the utility model is that each set of displacement sensing system also includes an air-cooling jacket, and the center of the air-cooling jacket is provided with a central hole of the air-cooling jacket. through holes in the autoclave cover, the other ends of the two induction iron cores extend out of the autoclave through the two through holes in the autoclave cover respectively. Each inductive extensometer is threadedly connected with an air-cooled sleeve. The center of each inductive extensometer is provided with a center hole of the inductive extensometer, and each induction core extends into the center of the corresponding inductive extensometer. middle of the hole.

The further improvement of the utility model lies in that each air-cooling jacket is thread-tightly connected with the through hole of the autoclave cover on the autoclave cover.

The further improvement of the utility model is that each air-cooling jacket is provided with multi-stage air-cooling jacket cooling blades in the circumferential direction.

The further improvement of the utility model is that each inductive extensometer is sealed with an air-cooling jacket by an O-ring.

The further improvement of the utility model is that the original distance between the two ends of the metal sample clamped by two metal ohm clamps is the gauge length.

The further improvement of the utility model is that the fixed steering assembly includes an upper nut, an upper cone block, a cone opening steering block, a lower cone block and a lower nut, wherein the upper end of each induction iron core is provided with an external thread, and the upper nut 1, the upper cone block, the cone opening steering block, the lower cone block and the lower nut are sequentially arranged on the external thread of each induction iron core, and the two nuts are tightened to fix the induction iron core and the fixed steering assembly.

The further improvement of the utility model is that the two connecting screws are both perpendicular to the central axis of the metal sample, and the two induction cores are parallel to the central axis of the metal sample.

Compared with the prior art, the utility model has the beneficial effects of:

The utility model is a system for real-time monitoring of the strain of a metal sample in a high-temperature and high-pressure environment. The strain of the metal sample is transmitted to a displacement sensing system at a normal temperature and high pressure through a connecting component system located in a high-temperature and high-pressure environment, and then through a data acquisition system. The signal is collected and the actual strain is calculated, which overcomes the problem that the current technology cannot monitor the strain in the high temperature and high pressure environment in real time, and realizes the real time monitoring of the strain of the metal sample in the high temperature and high pressure environment. Among them, the actual strain of the metal sample is calculated by using a high-precision inductive extensometer to measure the displacement difference between two sets of connected components located in a high-temperature and high-pressure environment, which avoids the influence of thermal deformation of the connected components in a high-temperature and high-pressure environment on the measurement results, and overcomes the It solves the problem of inaccurate strain measurement in the prior art, has high measurement accuracy, and can meet the test requirements.

To sum up, the utility model has a clever design and a wide range of applications, and can be installed in various testing machines in high-temperature and high-pressure environments common in laboratories, including high-temperature, high-pressure, slow-tensile stress corrosion testing machines, high-temperature, high-pressure, constant-load stress corrosion testing machines , high temperature and high pressure corrosion fatigue testing machine, etc., can accurately measure the sample strain in real time.

Description of drawings:

Fig. 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 is a schematic structural diagram of the connection assembly system described in the utility model;

Fig. 3 is a structural schematic diagram of the displacement sensing system described in the utility model;

Among them, 1 is a metal ohm clamp; 2 is a connecting screw; 3 is a fixed steering assembly; 3A is a conical opening steering block; 3B-1 is an upper cone block; 3B-2 is a lower cone block; 3C-1 is an upper nut ;3C-2 is the lower nut; 4 is the induction core; 5 is the air-cooled sleeve; 5A is the center hole of the air-cooled sleeve; 5B is the cooling blade of the air-cooled sleeve; 6 is the inductive extensometer; 6A is the O-ring; 6B is the inductive Extensometer center hole; 7 is a signal amplifier; 8 is a signal collector; 9 is an autoclave, 9A is the through hole of the autoclave cover; 9B is the autoclave cover; 10 is a metal sample.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, the utility model is a system for real-time monitoring of the strain of a metal sample in a high-temperature and high-pressure environment, including two sets of connecting component systems, two sets of displacement sensing systems and a data acquisition system, wherein each set of connecting component systems Both include a metal ohmic clip 1, a connecting screw 2, a fixed steering assembly 3 and an induction core 4; each set of displacement sensing system includes: an air-cooled sleeve 5 and an inductive extensometer 6; the data acquisition system includes: a signal amplifier 7 and Signal collector 8. The specific structure is as follows:

Both sets of connecting component systems are set in the high-temperature and high-pressure environment in the autoclave 9, wherein two metal ohmic clamps 1 are respectively clamped at the two ends of the metal sample 10, and the original distance between the two ends is the gauge length. As shown in Figures 2 and 3, the fixed steering assembly 3 includes an upper nut 3C-1, an upper cone block 3B-1, a conical opening steering block 3A, a lower cone block 3B-2 and a lower nut 3C-2, wherein, The metal ohm clip 1 and the conical opening steering block 3A are both provided with internal threads, and the connecting screw 2 is provided with external threads. The metal ohmic clip 1 and the conical opening steering block 3A are connected through the connecting screw 2 . The induction iron core 4 is provided with an external thread, and one end of the induction iron core 4 provided with an external thread is provided with an upper nut 3C-1, an upper cone block 3B-1, a cone opening steering block 3A, a lower cone block 3B-2 and The lower nut 3C-2 is used to adjust the induction iron core 4 so that it is parallel to the central axis of the metal sample 10, and can pass through the through hole 9A of the autoclave cover, the central hole 5A of the air cooling jacket and the inductive extensometer in sequence without friction The central hole 6B, and the extended end of the induction core 4 is located in the middle of the inductive extensometer 6. Tighten two nuts to fix the induction core 4 and the fixed steering assembly 3. The two sets of connecting assemblies have the same structure. In addition, the connecting component system is made of high-temperature alloy with good corrosion resistance and high tensile strength.

As shown in FIG. 1 , the displacement sensing system and the signal acquisition system are located outside the autoclave 9 . As shown in Figure 2, the top of the air-cooling jacket 5 is provided with an arc surface, and the threaded hole at the lower end of the through hole 9A of the autoclave cover is provided with an inner arc surface, and the two are connected by thread sealing, and the air-cooling jacket 5 is provided with a multi-stage air-cooling jacket upward. The cooling blade 5B is used to cool the high-temperature and high-pressure solution as a normal temperature and high-pressure solution. The bottom of the air-cooling sleeve 5 is provided with an internal thread, and the top of the inductive extensometer 6 is provided with an external thread. An O-ring 6A is installed at the connection between the two. Press the O-ring 6A for sealing. The inductance extensometer 6 is sequentially connected with the signal amplifier 7 and the signal collector 8 as shown in FIG. 1 .

In order to further understand the utility model, its using method is described as follows now:

According to the installation method, the real-time monitoring system for metal sample strain in the high temperature and high pressure environment is installed, and the signal collector 8 is opened to start collecting, and then the temperature and pressure of the autoclave 9 are raised to the test temperature and pressure, and the The signal collector is cleared, and the mechanical and chemical interaction test of metal materials in a high-temperature and high-pressure environment begins. The metal sample is subjected to axial force, and the gauge length is elongated or shortened. The connecting component system is transmitted to the induction iron core 4, and the inductive extensometer 6 can sense the displacement of the two sets of induction iron cores, and send out an electrical signal, the signal amplifier amplifies the electrical signal, and the signal collector collects the amplified electrical signal, Calculate the displacement difference of the two connected component systems, and then divide it by the length of the original gauge length section to obtain the actual strain of the gauge length, which is the strain of the metal sample 10.

It should be noted that, before the real-time monitoring of the strain of the metal sample 10 is performed, the signal collector 8 is first cleared.

Claims (8)

1. A system for real-time monitoring of the metal sample strain in a high temperature and high pressure environment, characterized in that it comprises two sets of connection assembly systems, two sets of displacement sensing systems and a data acquisition system; wherein, Each set of connecting component system includes metal ohmic clip (1), connecting screw rod (2), fixed steering assembly (3) and induction iron core (4), and each set of displacement sensing system includes inductive extensometer (6 ), the data acquisition system includes a signal amplifier (7) and a signal collector (8); Both sets of connecting component systems are set in the autoclave (9), wherein two metal ohmic clips (1) are respectively clamped at both ends of the metal sample (10), and each metal ohmic clip (1) is connected to One end of a connecting screw (2) is connected, the other ends of the two connecting screws (2) are connected to one end of an induction iron core (4) through a fixed steering assembly (3), and the other ends of the two induction iron cores (4) One end all stretches out to the outside of the autoclave (9); Two sets of displacement sensing systems and data acquisition systems are arranged outside the autoclave (9), wherein two inductive extensometers (6) are respectively connected to the other ends of the two inductive iron cores (4), and the two inductive extensometers The extensometer (6) is sequentially connected with the signal amplifier (7) and the signal collector (8). 2. a kind of system according to claim 1 monitors the strain of metal sample in high temperature and high pressure environment in real time, it is characterized in that, each cover displacement sensing system also comprises air-cooled jacket (5), the center of air-cooled jacket (5) Both are provided with air-cooling jacket central holes (5A), wherein, the autoclave (9) is provided with an autoclave cover (9B), and the autoclave cover (9B) is provided with two autoclave cover through holes (9A), two The other end of the induction iron core (4) protrudes out of the autoclave (9) through two through holes (9A) of the autoclave lid respectively, and each air-cooling sleeve (5) is set on one induction iron core (4) and the corresponding Between the through holes (9A) of the autoclave cover, each inductive extensometer (6) is threadedly connected with an air cooling jacket (5), and the center of each inductive extensometer (6) is equipped with an inductive extensometer. meter central hole (6B), each induction iron core (4) extends into the middle part of the corresponding inductive extensometer central hole (6B). 3. a kind of system according to claim 2 monitors the strain of metal sample in the high temperature and high pressure environment in real time, it is characterized in that, each air-cooled jacket (5) is all through holes with the autoclave cover on the autoclave cover (9B) (9A) between the threaded sealing connection. 4. A system for real-time monitoring of metal sample strain in a high-temperature and high-pressure environment according to claim 2, characterized in that, the circumferential direction of each air-cooling jacket (5) is provided with multi-stage air-cooling jacket cooling blades (5B) . 5. A system for real-time monitoring of metal sample strain in a high-temperature and high-pressure environment according to claim 2, wherein an O-type ring (6A) seal. 6. A system for real-time monitoring of metal sample strain in a high temperature and high pressure environment according to claim 1, characterized in that two metal ohmic clips (1) are clamped between the two ends of the metal sample (10) The original distance is the gauge length. 7. A system for real-time monitoring of metal sample strain in a high-temperature and high-pressure environment according to claim 1, wherein the fixed steering assembly (3) includes an upper nut (3C-1), an upper cone block (3B- 1), the conical opening steering block (3A), the lower cone block (3B-2) and the lower nut (3C-2), wherein, the upper end of each induction core (4) is provided with an external thread, and the upper nut ( 3C-1), the upper cone block (3B-1), the cone opening diversion block (3A), the lower cone block (3B-2) and the lower nut (3C-2) are sequentially arranged on each induction core (4 ), tighten the two nuts (3C-1, 3C-2) to fix the induction iron core (4) and the fixed steering assembly (3). 8. A system for real-time monitoring of the strain of a metal sample in a high temperature and high pressure environment according to claim 1, wherein the two connecting screws (2) are perpendicular to the central axis of the metal sample (10), and the two inductive The iron cores (4) are all parallel to the central axis of the metal sample (10).