Creep test device

Abstract

The utility model discloses a creep test device, which relates to the field of metal material lasting creep performance detection, and comprises a reaction kettle, a heating disc, a circulating pump, two upper split rubber plugs and two lower split rubber plugs, the two upper split rubber plugs and the two lower split rubber plugs are used for blocking upper and lower openings of the reaction kettles respectively, a heating kettle is installed at the top of the heating disc, circulating pipelines are connected and installed between the reaction kettles and the circulating pump and between the reaction kettles and the heating kettle, and a switch valve is installed in the middle of the circulating pipeline between the heating kettle and the reaction kettles. A second thermometer and a spherical condenser pipe are respectively mounted at the top of the heating kettle in a penetrating manner, and the second thermometer is used for detecting the temperature of liquid in the heating kettle; the sample deformation can be more accurately collected through the grating ruler, so that the test result is more accurate and reliable, the influence of the weight of the reaction kettle on the sample deformation is reduced, and meanwhile, the temperature of a solution in a circulating system is ensured.

Description

Technical Field

[0001] The utility model relates to the field of metal material long-lasting creep performance detection, in particular to a creep test device. Background Art

[0002] Lightweight materials represented by aluminum alloys, magnesium alloys, and titanium alloys are widely used in aerospace, automobile manufacturing, and other lightweight projects due to their light weight and high strength. However, their easy corrosion in the atmosphere and water media limits their application. At present, the molten salt environment stress corrosion testing machine uses a combination of a salt storage kettle and a test kettle to conduct tests. However, since both kettles require high-temperature sealing, the structure is complex and the equipment cost is high. At the same time, after the test, solid molten salt is easy to remain in the salt transport pipeline and is not easy to remove, resulting in the device being able to use corrosive media. The device is relatively limited. Therefore, a circulating heating reactor that can be installed on a creep specimen and uses a grating ruler lead-out rod to monitor the real-time deformation of the specimen is conceived.

[0003] Due to the limitations of the large size of the reactor, the long test time, and the imperfect functions of the testing machine, the deformation of the specimen cannot be monitored in real time by the grating ruler or extensometer during the test, but can only be roughly estimated by the displacement of the crossbeam, resulting in problems such as uneven stress-strain curves and inaccurate yield strength results obtained by tension. Utility Model Content

[0004] The main purpose of the utility model is to provide a creep test device, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A creep test device comprises a reactor, a heating plate, a circulation pump, two upper split rubber plugs and two lower split rubber plugs, wherein the interior of the reactor is used to place test pieces, the two upper split rubber plugs and the two lower split rubber plugs are respectively used to block the upper and lower openings of the reactor, a heating reactor is installed on the top of the heating plate, a circulation pipeline is connected and installed between the reactor and the circulation pump and the heating reactor, and a switch valve is installed in the middle of the circulation pipeline between the heating reactor and the reactor.

[0007] As a further solution of the utility model, a second thermometer and a spherical condenser are respectively installed through the top of the heating kettle, and the second thermometer is used to detect the temperature of the liquid in the heating kettle.

[0008] As a further solution of the utility model, a first thermometer is installed through the outside of the reactor, and the first thermometer is used to detect the temperature of the liquid in the reactor.

[0009] As a further solution of the utility model, a support assembly is installed at the bottom of the reactor, and the support assembly includes two lower connecting rods and two upper connecting rods. The middle notches between the two lower connecting rods and the two upper connecting rods are respectively used to clamp the lower shoulder and the upper shoulder of the sample piece. A lower clamp is sleeved on the outer periphery of the middle notch between the two lower connecting rods, and an upper clamp is sleeved on the outer periphery of the middle notch between the two upper connecting rods. A grating scale plastic sleeve is installed on the bottom of the two lower connecting rods.

[0010] As a further solution of the utility model, the lower clamp is used to clamp the lower end shoulder of the test piece, and the pulley at the lower end of the lower connecting rod is connected to the connecting rod track of the testing machine.

[0011] As a further solution of the utility model, the upper clamp is used to clamp the upper shoulder of the sample piece, and the interior of the grating ruler plastic sleeve is used to insert the grating ruler.

[0012] The beneficial effects of the utility model are as follows:

[0013] Compared with other stress corrosion tests that can only roughly estimate the deformation of the sample through the displacement of the crossbeam, the utility model combines the upper connecting rod and the lower connecting rod of the lead-out rod, the grating ruler structure and the solution heating kettle, and can more accurately collect the deformation of the sample through the grating ruler, so that the test results are more accurate and reliable;

[0014] The utility model redesigns the reactor structure of a single heating base, heats the circulation system through a corrosion solution, reduces the influence of the reactor weight on the deformation of the sample, and ensures the solution temperature in the circulation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall front view of a creep test device of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of an upper split rubber plug and a lower split rubber plug in a creep test device of the utility model;

[0017] Figure 3 This is a structural schematic diagram of a lower connecting rod in a creep test device of the utility model;

[0018] Figure 4 The utility model is a schematic structural diagram of an upper connecting rod in a creep test device.

[0019] In the figure: 1. Reactor; 1-1. Upper split rubber plug; 2-1. Lower split rubber plug; 3. Heating plate; 4. Heating kettle; 5. Circulation pipeline; 6. Circulation pump; 7. Switch valve; 8. Spherical condenser; 9-1. First thermometer; 9-2. Second thermometer; 10. Sample piece; 11. Support assembly; 11-1. Lower connecting rod; 12-1. Lower clamp; 12-2. Upper clamp; 13. Plastic sleeve of grating scale; 11-2. Upper connecting rod. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1-4 As shown, a creep test device includes a reactor 1, a heating plate 3, a circulation pump 6, two upper split rubber plugs 1-1 and two lower split rubber plugs 2-1. The interior of the reactor 1 is used to place a test piece 10. The two upper split rubber plugs 1-1 and the two lower split rubber plugs 2-1 are used to block the upper and lower openings of the reactor 1 respectively. A heating reactor 4 is installed on the top of the heating plate 3. A circulation pipe 5 is connected and installed between the reactor 1 and the circulation pump 6 and the heating reactor 4. A switch valve 7 is installed in the middle of the circulation pipe 5 between the heating reactor 4 and the reactor 1.

[0022] In this embodiment, a second thermometer 9-2 and a spherical condenser 8 are respectively installed through the top of the heating kettle 4. The second thermometer 9-2 is used to detect the temperature of the liquid in the heating kettle 4. The second thermometer 9-2 measures the temperature in the heating kettle 4 and adjusts the temperature of the liquid in the heating kettle 4 heated by the heating plate 3.

[0023] In this embodiment, a first thermometer 9-1 is installed on the outside of the reactor 1. The first thermometer 9-1 is used to detect the temperature of the liquid in the reactor 1. The first thermometer 9-1 detects the temperature of the liquid in the reactor 1 and controls the circulation pump 6 to keep the temperature in the reactor 1 balanced.

[0024] In this embodiment, a support assembly 11 is installed at the bottom of the reactor 1, and the support assembly 11 includes two lower connecting rods 11-1 and two upper connecting rods 11-2. The middle grooves between the two lower connecting rods 11-1 and the two upper connecting rods 11-2 are respectively used to clamp the lower end shoulder and the upper end shoulder of the sample piece 10. The outer periphery of the middle groove between the two lower connecting rods 11-1 is sleeved with a lower clamp 12-1, and the outer periphery of the middle groove between the two upper connecting rods 11-2 is sleeved with an upper clamp 12-2. The bottoms of the two lower connecting rods 11-1 are both installed with grating scale plastic sleeves 13, and the grating scale is inserted into the grating scale plastic sleeves 13 and fixed by tightening screws with a screwdriver.

[0025] In this embodiment, the lower clamp 12-1 is used to clamp the lower shoulder of the specimen 10, the pulley at the lower end of the lower connecting rod 11-1 is connected to the connecting rod track of the testing machine, and the upper and lower shoulders of the specimen 10 are fixed by the lower clamp 12-1 and the upper clamp 12-2.

[0026] In this embodiment, the upper clamp 12 - 2 is used to clamp the upper shoulder of the sample 10 , and the interior of the grating ruler plastic sleeve 13 is used to insert the grating ruler, and the creep degree of the sample 10 is detected by the grating ruler.

[0027] It should be noted that the utility model is a creep test device. When in use, the reactor 1 needs to use two upper split rubber plugs 1-1 and two lower split rubber plugs to block the upper and lower openings respectively, in order to keep warm, prevent water leakage and prevent the volatile solution from volatile toxic and harmful gases from polluting the laboratory environment. The grating scale structure for monitoring the real-time deformation of the creep test is composed of a lower connecting rod 11-1, an upper connecting rod 11-2, a lower clamp 12-1, an upper clamp 12-2, and a grating scale plastic sleeve 13. The corrosion solution circulation heating system is composed of a heating plate 3, a solution heating kettle 4, a circulation pipeline 5, a circulation pump 6, a switch valve 7, a spherical condenser 8, and a second thermometer 9-2 and a first thermometer 9-1 for measuring the temperature of the liquid in the heating kettle 4 and the test reactor 1 respectively. The whole device ensures that the corrosion solution is always kept at the same horizontal plane higher than the parallel section of the sample through the principle of a communicating vessel, and the stability of the test temperature is ensured by the temperature measurement and PID algorithm temperature control device.

[0028] During the assembly process, first wrap the upper and lower ends of the creep specimen 10 with waterproof raw tape and then pass it through the upper and lower openings of the reactor 1, place the upper clamp 12-2 and the lower clamp 12-1 on the upper and lower shoulders of the specimen respectively, use the upper split rubber plug 1-1 and the lower split rubber plug 2-1 to block the remaining gap, then clamp the middle notch of the lower connecting rod 11-1 to the lower shoulder of the specimen 10 respectively, clamp the lower clamp 12-1, align the pulley below the lower connecting rod 11-1 with the connecting rod track of the testing machine, and the installation steps of the upper connecting rod 11-2 are the same. After connecting the upper connecting rod 11-1 and the lower connecting rod 11-2, use four springs to respectively insert the upper connecting rod 11 of the lead-out rod. -1 and the front and rear ends of the lower connecting rod 11-2 of the lead-out rod, in order to make the upper connecting rod 11-1 and the lower connecting rod 11-2 connected more tightly, so that there will be no shaking during the experiment. Finally, after the grating ruler plastic sleeve 13 is inserted, the grating ruler is inserted and the screws are tightened with a screwdriver to prevent the grating ruler from falling off. The heating kettle 4 is connected to the heating plate 3 through threads, and then the circulating pipe 5, circulating pump 6, switch valve 7, spherical condenser 8 are connected and installed respectively, and then the corrosion solution is added. The corrosion solution is heated to the specified temperature through the heating plate 3 and the first thermometer 9-1, the second thermometer 9-2 and the temperature control device and kept warm for a certain period of time, and then the load is applied to start the test.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A creep test device, characterized in that: The invention comprises a reaction kettle (1), a heating plate (3), a circulation pump (6), two upper split rubber plugs (1-1) and two lower split rubber plugs (2-1); the interior of the reaction kettle (1) is used to place a sample (10); the two upper split rubber plugs (1-1) and the two lower split rubber plugs (2-1) are used to block the upper and lower openings of the reaction kettle (1) respectively; a heating kettle (4) is installed on the top of the heating plate (3); a circulation pipeline (5) is installed between the reaction kettle (1) and the circulation pump (6) and the heating kettle (4); and a switch valve (7) is installed in the middle of the circulation pipeline (5) between the heating kettle (4) and the reaction kettle (1).

2. A creep test device according to claim 1, characterized in that: A second thermometer (9-2) and a spherical condenser (8) are respectively installed through the top of the heating kettle (4), and the second thermometer (9-2) is used to detect the temperature of the liquid in the heating kettle (4).

3. A creep test device according to claim 1, characterized in that: A first thermometer (9-1) is installed through the outside of the reaction kettle (1), and the first thermometer (9-1) is used to detect the temperature of the liquid in the reaction kettle (1).

4. A creep test device according to claim 1, characterized in that: A support assembly (11) is installed at the bottom of the reaction kettle (1), and the support assembly (11) includes two lower connecting rods (11-1) and two upper connecting rods (11-2). The middle notches between the two lower connecting rods (11-1) and the two upper connecting rods (11-2) are respectively used to clamp the lower end shoulder and the upper end shoulder of the sample piece (10). A lower clamp (12-1) is sleeved on the outer periphery of the middle notch between the two lower connecting rods (11-1), and an upper clamp (12-2) is sleeved on the outer periphery of the middle notch between the two upper connecting rods (11-2). A grating scale plastic sleeve (13) is installed at the bottom of the two lower connecting rods (11-1).

5. A creep test device according to claim 4, characterized in that: The lower clamp (12-1) is used to clamp the lower end shoulder of the test piece (10), and the pulley at the lower end of the lower connecting rod (11-1) is connected to the connecting rod track of the testing machine.

6. A creep test device according to claim 4, characterized in that: The upper clamp (12-2) is used to clamp the upper end shoulder of the sample piece (10), and the interior of the grating ruler plastic sleeve (13) is used to plug the grating ruler.

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