Atmosphere environment test chamber

Abstract

The present invention relates to an atmosphere environment test chamber. The atmosphere environment test chamber includes a chamber body, a pull rod, a fixture and an extensometer; the chamber body includes a main body, a first box cover and a second box cover, the main body is provided with a test cavity and an operation hole that are interconnected, one side of the test cavity has an opening, and the second box cover is provided with an installation cavity; when the chamber body is in a first state, the first box cover is connected to the main body to cover the opening; when the chamber body is in a second state, the second box cover is connected to the main body to cover the opening, and the installation cavity is connected to the test cavity; the pull rod is provided through the operation hole and extends into the test cavity, and the pull rod can move relative to the chamber body along the extension direction of the operation hole; the fixture includes a first connecting member and a second connecting member, the first connecting member is connected to the main body, the second connecting member is connected to the pull rod, and the first connecting member and the second connecting member are used to connect the two ends of the sample; the extensometer is connected to the second box cover, and the extensometer is partially accommodated in the installation cavity, and the extensometer is used to connect to the sample when the chamber body is in the second state.

Description

Technical Field

[0001] The present invention relates to the technical field of material performance testing, in particular to an atmosphere environment test chamber. Background Art

[0002] The development and utilization of hydrogen energy is an important direction for national energy development. The abundant natural gas, coal, wind and solar energy resources in western my country can provide hydrogen sources such as light hydrocarbon cracking hydrogen, hydrogen-containing coal gasification, and water electrolysis hydrogen production. The implementation of related industrialization projects indicates that the western region has huge hydrogen-containing gas production capacity. These hydrogen-containing gases need to be transported to users in the east through pipelines, and tensile properties and fracture toughness, as important indicators of hydrogen storage pressure vessels, are often used to evaluate the safety performance of hydrogen storage pressure vessels. The tools and environments required for tensile tests and fracture tests are different. However, the existing hydrogen environment test chamber has a single structure and function and cannot adapt to tensile tests and fracture tests at the same time, which increases the test cost. Summary of the Invention

[0003] Based on this, it is necessary to provide an atmosphere environment test chamber to address the technical problems that the existing hydrogen environment test chamber has a single structure and function, cannot adapt to tensile tests and fracture tests at the same time, and affects the test cost.

[0004] An atmosphere environment test chamber, comprising:

[0005] The cabin comprises a main body, a first box cover, and a second box cover. The main body is provided with a test cavity and an operation hole that are interconnected. One side of the test cavity has an opening, and the test cavity is used to be filled with a gas medium. The second box cover is provided with an installation cavity. The cabin has a first state and a second state. When the cabin is in the first state, the first box cover is connected to the main body to cover the opening. When the cabin is in the second state, the second box cover is connected to the main body to cover the opening, and the installation cavity is used to communicate with the test cavity.

[0006] a pull rod, one end of which is connected to the stretching member, the other end of which is passed through the operating hole and extends into the test cavity, and the pull rod is used to move relative to the cabin along the extension direction of the operating hole under the drive of the stretching member;

[0007] a fixture, accommodated in the test chamber, comprising a first connecting member and a second connecting member, wherein the first connecting member is connected to the main body, the second connecting member is connected to the pull rod, and the first connecting member and the second connecting member are used to connect two ends of the sample; and

[0008] An extensometer is connected to the second box cover, and the extensometer is partially accommodated in the installation cavity, and the extensometer is used to be connected to the sample when the cabin is in the second state.

[0009] In one embodiment, the second box cover includes a connecting plate and a protrusion that are connected to each other, the connecting plate is detachably connected to the main body, the protrusion protrudes toward a side away from the main body relative to the connecting plate, and the installation cavity is provided on the protrusion.

[0010] In one embodiment, the atmosphere environment test chamber also includes a heating component, which includes a heating coil and a power supply. The heating coil is arranged in the test chamber, and a first channel and a second channel are provided on the main body. The two ends of the heating coil are respectively connected to the power supply located outside the main body through the first channel and the second channel for heating.

[0011] In one embodiment, the heating coil is spirally wound along the extension direction of the operation hole, and the heating coil is sleeved on the sample.

[0012] In one embodiment, a delivery hole is constructed on the heating coil, and the atmosphere environment test chamber also includes a cooling generator, which is located outside the main body. The cooling generator is connected to the heating coil through the first channel and the second channel, and the cooling generator is used to deliver cooling medium to the delivery hole.

[0013] In one embodiment, the atmosphere environment test chamber also includes a temperature control component, which includes a temperature control generator and a temperature control tube. The temperature control tube is used to be arranged around the sample along the extension direction of the operation hole, and a temperature control channel is constructed in the temperature control tube. A third channel and a fourth channel are provided on the main body. The temperature control channel is connected to the temperature control generator located outside the main body through the third channel and the fourth channel respectively. The temperature control generator is used to alternately transport cold medium and hot medium to the temperature control channel.

[0014] In one embodiment, the two ends of the temperature control tube respectively have an inlet and an outlet connected to the temperature control channel. There are two temperature control tubes, the outlet of one of the two temperature control tubes and the inlet of the other are located on the same side, and the outlet of the other of the two temperature control tubes and the inlet of one are located on the same side.

[0015] In one embodiment, the atmosphere environment test chamber further includes a pressure balance assembly, which is connected to the pull rod, and the pressure balance assembly is used to apply a force to the pull rod so that the force applied by the tensile member to the pull rod in the extension direction of the operating hole is the same as the force applied by the pull rod to the sample.

[0016] In one embodiment, the pressure balancing assembly includes a piston sleeve, the main body includes a main box cover, the main box cover is used to connect with the first box cover or the second box cover, the operation hole is provided on the main box cover, the main box cover is provided with a matching cavity connected with the operation hole, the pull rod portion is passed through the matching cavity, the piston sleeve is sleeved on the pull rod, and the piston sleeve is accommodated in the matching cavity and abuts against the cavity wall of the matching cavity to separate the matching cavity into a first cavity and a second cavity, the second cavity is connected to the outside and is located on the side of the piston sleeve close to the clamp;

[0017] In the extension direction of the operating hole, the product of the area difference between the end of the pull rod close to the sample and the sample and the air pressure in the test chamber is equal to the product of the area of ​​the side of the piston sleeve away from the clamp in the extension direction of the operating hole and the air pressure in the first cavity.

[0018] In one embodiment, the pressure balancing assembly further includes a gas conveying member, and a first gas delivery hole connected to the first cavity is provided on the main box cover, and the gas conveying member is used to introduce gas into the first cavity through the first gas delivery hole to adjust the air pressure in the first cavity.

[0019] Beneficial effects:

[0020] The atmospheric environment test chamber provided by the embodiment of the present invention includes a chamber body, a pull rod, a clamp and an extensometer; the chamber body includes a main body, a first box cover and a second box cover, the main body is provided with a test cavity and an operation hole that are interconnected, one side of the test cavity has an opening, the test cavity is used to be filled with a gas medium, and the second box cover is provided with an installation cavity; the chamber body has a first state and a second state, when the chamber body is in the first state, the first box cover is connected to the main body to cover the opening; when the chamber body is in the second state, the second box cover is connected to the main body to cover the opening, and the installation cavity is used to be connected to the test cavity. The chamber is connected to a tensile member; one end of the pull rod is connected to the tensile member, and the other end of the pull rod is inserted into the operating hole and extends into the test chamber. The pull rod is driven by the tensile member to move relative to the chamber in the direction of the operating hole. A clamp is housed in the test chamber and includes a first connector and a second connector. The first connector is connected to the main body, and the second connector is connected to the pull rod. The first and second connectors are used to connect the ends of the specimen. An extensometer is connected to the second cover, and the extensometer is partially housed in the mounting cavity. The extensometer is used to connect to the specimen when the chamber is in the second state. In this application, the specimen is connected to the first and second connectors, and the tensile member drives the second connector to move in the direction of the operating hole via the pull rod, thereby stretching the specimen. When the chamber is in the first state, the first cover is connected to the main body to seal the test chamber, allowing the specimen to be tensile tested in an ambient environment. When the chamber is in the second state, the second cover is connected to the main body to seal the test chamber. The mounting cavity on the second cover facilitates the installation of the extensometer, enabling the measurement of the specimen's plane strain fracture toughness K. IC The value of the side compact design is adopted, which greatly reduces the size of the atmosphere environment test chamber, thereby greatly shortening the time for the temperature control, pressure maintenance and other parameter indicators in the test chamber to reach a stable state, and then can adapt to the tensile test and fracture test of the specimen under different temperature and pressure environments, thereby improving the adaptability of the atmosphere environment test chamber and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 1 .

[0022] Figure 2 A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 2 .

[0023] Figure 3 A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 3 .

[0024] Figure 4 A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 4 .

[0025] Figure 5 A schematic diagram of an atmosphere environment test chamber provided in accordance with an embodiment of the present invention.

[0026] Figure Number:

[0027] 100 - Cabin; 110 - Main body; 111 - Test cavity; 112 - Operation hole; 113 - Auxiliary hole; 120 - First box cover; 130 - Second box cover; 131 - Installation cavity; 132 - Connecting plate; 133 - Bump; 140 - Main box cover; 141 - Matching cavity; 142 - Matching hole; 143 - End cover; 144 - Connecting cylinder; 145 - First cavity; 146 - Second cavity; 150 - Third box cover; 160 - Fourth box cover; 170 - Observation window; 210 - Pull rod; 220- fixture; 221- first connecting piece; 222- second connecting piece; 230- extensometer; 240- gas medium conveying piece; 300- heating assembly; 310- heating coil; 320- first channel; 330- second channel; 400- temperature control assembly; 410- temperature control tube; 411- inlet; 412- outlet; 500- pressure balance assembly; 510- piston sleeve; 520- gas conveying piece; 530- first gas delivery hole; 540- second gas delivery hole; 600- specimen. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] See Figure 1 and Figure 2 , Figure 1 A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 1 . Figure 2 A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 2An embodiment of the present invention provides an atmosphere environment test chamber, comprising a chamber 100, a pull rod 210, a clamp 220 and an extensometer 230; the chamber 100 comprises a main body 110, a first box cover 120 and a second box cover 130, the main body 110 is provided with a test cavity 111 and an operation hole 112 which are interconnected, one side of the test cavity 111 has an opening, the test cavity 111 is used to be filled with a gas medium, and the second box cover 130 is provided with an installation cavity 131; the chamber 100 has a first state and a second state, when the chamber 100 is in the first state, the first box cover 120 is connected to the main body 110 to cover the opening; when the chamber 100 is in the second state, the second box cover 130 is connected to the main body 110 to cover the opening, and the installation cavity 131 is used to connect with the test cavity 111 One end of the pull rod 210 is used to be connected to the tensile member, and the other end of the pull rod 210 is passed through the operating hole 112 and extends into the test cavity 111. The pull rod 210 is used to move relative to the cabin body 100 along the extension direction of the operating hole 112 under the drive of the tensile member; the clamp 220 is accommodated in the test cavity 111, and the clamp 220 includes a first connecting member 221 and a second connecting member 222. The first connecting member 221 is connected to the main body 110, and the second connecting member 222 is connected to the pull rod 210. The first connecting member 221 and the second connecting member 222 are used to connect the two ends of the sample 600; the extensometer 230 is connected to the second box cover 130, and the extensometer 230 is partially accommodated in the installation cavity 131. The extensometer 230 is used to be connected to the sample 600 when the cabin body 100 is in the second state.

[0035] Specifically, in this application, the first connecting member 221 and the second connecting member 222 are connected to the sample 600, and the tensile member drives the second connecting member 222 to move along the extension direction of the operation hole 112 through the pull rod 210, so that the sample 600 can be stretched. Wherein, the sample 600 is metal.

[0036] When the cabin 100 is in the first state, Figure 2 For example, the first cover 120 is connected to the main body 110 to seal the test field, so that the sample 600 can be subjected to the tensile test in a full atmosphere environment. Figure 1 For example, the second cover 130 is connected to the main body 110 to seal the test site. Since the second cover 130 has a mounting cavity 131, it is convenient to install the extensometer 230 and measure the plane strain fracture toughness K of the sample 600. IC The value of , that is, the side-positioned compact design is adopted, which greatly reduces the size of the atmosphere environment test chamber, thereby greatly shortening the time for the temperature control, pressure maintenance and other parameter indicators in the test cavity 111 to reach a stable state, and thus can adapt to the tensile test and fracture test of the sample 600 under different temperature and pressure environments, thereby improving the adaptability of the atmosphere environment test chamber and saving costs.

[0037] It should be noted that the pull rod 210 is sealed to the operating hole 112, so that the test chamber 111 can be filled with gas for testing. In this embodiment, the gas medium is described as hydrogen, but it is not limited to this. It can also be nitrogen, natural gas, etc.

[0038] Furthermore, the atmosphere environment test chamber also includes a gas medium conveying component 240. The main body 110 is provided with a second gas supply hole 540 connected to the test chamber 111. The gas medium conveying component 240 inputs hydrogen medium into the test chamber 111 through the second gas supply hole 540, so that the sample 600 can be subjected to tensile tests and fracture tests at different gas pressures.

[0039] See Figure 1 In one embodiment, the auxiliary box cover includes a connecting plate 132 and a protrusion 133 that are connected to each other. The connecting plate 132 is detachably connected to the main body 110. The protrusion 133 protrudes relative to the connecting plate 132 toward the side away from the main body 110. The installation cavity 131 is set on the protrusion 133, thereby further reducing the volume of the atmosphere environment test chamber, greatly shortening the time for the temperature control, pressure maintenance and other parameter indicators in the test chamber 111 to reach a stable state, and improving the test work efficiency.

[0040] See Figure 1 In one embodiment, the atmosphere environment test chamber further includes a heating component 300, which includes a heating coil 310 and a power supply. The heating coil 310 is disposed in the test cavity 111, and a first channel 320 and a second channel 330 are provided on the main body 110. The two ends of the heating coil 310 are respectively connected to the power supply located outside the main body 110 through the first channel 320 and the second channel 330 for heating.

[0041] Specifically, in the present application, a heating coil 310 is provided in the test chamber 111 , and the heating coil 310 is connected to an external power source to generate heat, thereby achieving rapid and uniform heating in the test chamber 111 and improving test efficiency.

[0042] See Figure 1 To accelerate the material's performance degradation in an atmospheric environment and thus shorten experimental time, in one embodiment, a heating coil 310 is spirally wound along the extension direction of the operating hole 112. The heating coil 310 is then placed over the specimen 600. This rapidly heats the surface of the specimen 600 through the skin effect, resolving the issues of slow heating speed, long heating time, and uneven temperature in traditional experiments using resistance wire heating. Furthermore, for workpieces operating in high-temperature atmospheric environments, this system can accurately simulate the working conditions and realistically replicate the actual working conditions of the raw material during the process of forming.

[0043] See Figure 1 In one embodiment, a delivery hole is constructed on the heating coil 310, and the atmosphere environment test chamber also includes a cooling generator, which is located outside the main body 110. The cooling generator is connected to the heating coil 310 through a first channel 320 and a second channel 330. The cooling generator is used to deliver cooling medium to the delivery hole to achieve cooling of the atmosphere environment test chamber. Compared with the additional setting of the cooling component structure, the structure is simplified and the cost is reduced.

[0044] participate Figure 3 , Figure 3 A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 3 In one embodiment, the atmosphere environment test chamber also includes a temperature control component 400, which includes a temperature control generator and a temperature control tube 410. The temperature control tube 410 is used to be wound around the sample 600, and a temperature control channel is constructed in the temperature control tube 410. A third channel and a fourth channel are provided on the main body 110. The temperature control channel is connected to the temperature control generator located outside the main body 110 through the third channel and the fourth channel respectively. The temperature control generator is used to alternately transport cold medium and hot medium to the temperature control channel, so that the heat in the test cavity 111 can be cyclically and alternately taken away, meeting the test function requirements of cyclic and reciprocating temperature control, and simulating the sample 600 to form a stable service environment, thereby providing a stable and repeatable test environment guarantee for the test reproduction material service environment and the in-situ test of the various mechanical and mechanical properties of the material. Among them, the temperature control tube 410 is spirally wrapped and sleeved on the sample 600.

[0045] Furthermore, the third channel overlaps with the first channel 320 , and the fourth channel overlaps with the second channel 330 , thereby reducing the number of channels provided on the main body 110 .

[0046] participate Figure 3 In one embodiment, the two ends of the temperature control tube 410 respectively have an inlet 411 and an outlet 412 connected to the temperature control channel. There are two temperature control tubes 410. The outlet 412 of one of the two temperature control tubes 410 and the inlet 411 of the other are located on the same side, and the outlet 412 of the other of the two temperature control tubes 410 and the inlet 411 of one are located on the same side.

[0047] Specifically, the temperature control generator is used to alternately deliver cold medium and hot medium to the inlet 411 of the temperature control tube 410, and the cold medium and hot medium flow back to the temperature control generator through the outlet 412. By locating the inlets 411 and outlets 412 of the two temperature control tubes 410 on opposite sides, the temperature uniformity within the test chamber 111 can be improved, thereby improving the accuracy of the test results.

[0048] See Figure 4 , Figure 4A cross-section of an atmosphere test chamber provided in one embodiment of the present invention Figure 4 In one embodiment, the atmosphere environment test chamber further includes a pressure balance assembly 500 , which is connected to the pull rod 210 . The pressure balance assembly 500 is used to apply a force to the pull rod 210 so that the force applied by the tensile member to the pull rod 210 in the extension direction of the operating hole 112 is the same as the force applied by the pull rod 210 to the specimen 600 .

[0049] Specifically, in the present application, the pull rod 210 is partially located in the test chamber 111. Since the test chamber 111 is filled with hydrogen medium, the pull rod 210 will be subjected to the force of the air pressure in the test chamber. The pressure balance component 500 applies a force to the pull rod 210 to offset the force of the air pressure in the test chamber 111 on the pull rod 210, so that the pull rod 210 is subjected to force balance in a static state. When the component pulls the pull rod 210, the force applied by the tensile component on the pull rod 210 is equal to the force applied by the pull rod 210 on the sample 600, that is, no additional load will be added to the sample 600 under test, which can prevent the systematic error caused by the imbalance of pressure inside and outside the atmosphere test chamber, thereby improving the accuracy of testing the performance of the sample 600.

[0050] See Figure 4 In one embodiment, the pressure balancing assembly 500 includes a piston sleeve 510, the main body 110 includes a main tank cover 140, the main tank cover 140 is used to connect with the first tank cover 120 or the second tank cover 130, the operation hole 112 is provided on the main tank cover 140, the main tank cover 140 is provided with a matching cavity 141 communicating with the operation hole 112, the pull rod 210 is partially passed through the matching cavity 141, the piston sleeve 510 is accommodated in the matching cavity 141, the piston sleeve 510 is sleeved on the pull rod 210, and the piston sleeve 510 is accommodated in the matching cavity 141. It also abuts against the wall of the mating cavity 141 to separate the mating cavity 141 into a first cavity 145 and a second cavity 146. The second cavity 146 is connected to the outside and is located on the side of the piston sleeve 510 close to the fixture 220. In the extension direction of the operating hole 112, the product of the area difference between the end of the pull rod 210 close to the sample 600 and the sample 600 and the air pressure in the test cavity 111 is equal to the product of the area of ​​the side of the piston sleeve 510 away from the fixture 220 in the extension direction of the operating hole 112 and the air pressure in the first cavity 145.

[0051] Specifically, in the extension direction of the operating hole 112, the radial dimensions of the pull rod 210 are the same, and the area of ​​the end of the pull rod 210 close to the second connecting member 222 is larger than the area of ​​the sample 600. The test chamber 111 is filled with hydrogen medium, and there is a certain air pressure in the test chamber 111, which will apply a first thrust F1 to the pull rod 210 away from the sample 600, so that the tension applied to the sample 600 is different from the force applied to the pull rod 210 by the tensile member. In the present application, the piston sleeve 510 is sleeved on the pull rod 210, so that in the extension direction of the operating hole 112, the side of the piston sleeve 510 facing away from the clamp 220 forms an area difference with the pull rod 210, and then the air pressure in the second cavity 146 applies a second thrust F2 toward the clamp 220 to the piston sleeve 510, that is, a second thrust F2 toward the clamp 220 is applied to the pull rod 210. When the first thrust F1 and the second thrust F2 are equal in magnitude and opposite in direction, they can be offset and balanced, so that the tension applied to the sample 600 is the same as the force applied to the pull rod 210 by the tensile member, thereby preventing systematic errors caused by pressure imbalance inside and outside the atmosphere test chamber and improving the accuracy of the test results.

[0052] The main tank cover 140 is provided with an auxiliary hole 113 communicating with the second cavity 146 to communicate with the outside, thereby avoiding applying a force toward the first cavity 145 to the piston sleeve 510 .

[0053] It should be noted that the distance the pull rod 210 moves in the operating hole 112 is relatively small, so the effect on the change of the air pressure in the second cavity 146 is relatively small and can be ignored.

[0054] It should be noted that, in the process of the pull rod 210 moving along the extension direction of the operating hole 112, there is a downward friction force between the pull rod 210 and the hole wall of the operating hole 112, and there is a friction force between the piston sleeve 510 and the cavity wall of the mating cavity 141. The force applied to the pull rod 210 by the tensile member described in this embodiment is actually the actual force obtained by deducting the friction force exerted on the pull rod 210 from the theoretical force applied by the tensile member to the pull rod 210.

[0055] See Figure 4 In one embodiment, the pressure balancing assembly 500 further includes a gas delivery member 520. The main box cover 140 is provided with a first gas delivery hole 530 connected to the first cavity 145. The gas delivery member 520 is used to introduce gas into the first cavity 145 through the first gas delivery hole 530 to adjust the gas pressure in the first cavity 145.

[0056] Specifically, after installing the specimen 600, the first connector 221 needs to be connected to the pull rod 210. Due to the varying sizes of the specimens 600, the pull rod 210 will move in the direction of the operating hole 112, causing the position of the piston sleeve 510 relative to the mating cavity 141 to change, thereby changing the volume of the first cavity 145. Gas is introduced into the first cavity 145 through the first gas delivery hole 530 via the gas delivery member 520, thereby adjusting the air pressure within the first cavity 145 to ensure that the second thrust F2 is equal to the first thrust F1. This balances the pressure on both ends of the pull rod 210, improving the adaptability and reliability of the atmosphere test chamber.

[0057] See Figure 4 In one embodiment, in the extension direction of the operating hole 112, the area difference between the end of the pull rod 210 close to the sample 600 and the sample 600 is equal to the area of ​​the side of the piston sleeve 510 away from the clamp 220. Therefore, it is only necessary to ensure that the air pressure in the first cavity 145 is equal to the air pressure in the test cavity 111, which simplifies the steps and improves reliability.

[0058] Furthermore, the gas delivery component 520 is constructed as a gas medium delivery component 240, that is, gas is delivered to the test chamber 111 and the first cavity 145 through the gas delivery component 520, thereby ensuring that the air pressure in the first cavity 145 is the same as that in the test chamber 111, avoiding the situation where the accuracy of the test results is affected by errors in the air pressure measurement value, and improving the reliability of the atmosphere environment test chamber.

[0059] See Figure 4 In one embodiment, the main case cover 140 includes an end cover 143 and a connecting tube 144. The end cover 143 is connected to the first case cover 120 or the second case cover 130. The operation hole 112 is provided on the end cover 143. The connecting tube 144 is connected to the end cover 143. The mating cavity 141 is provided on the connecting tube 144, and the connecting tube 144 is provided with a mating hole 142 that communicates with the mating cavity 141. The pull rod 210 passes through the operation hole 112, passes through the mating cavity 141, and extends outside the main body 110 through the mating hole 142, thereby connecting to a tensile member outside the main body 110. The pull rod 210 is sealed with the wall of the mating hole 142.

[0060] Furthermore, a protrusion is provided on one side of the end cover 143 facing the connecting tube 144 . The protrusion is received in the mating cavity 141 and connected to the cavity wall of the mating cavity 141 to ensure connection stability.

[0061] See Figure 5 , Figure 5A schematic diagram of an atmospheric environment test chamber according to one embodiment of the present invention is shown. In one embodiment, the main body 110 further includes an observation window 170 , which is made of high-pressure, high-strength glass. This facilitates observation of the specimen 600 within the test chamber 111 during loading, stress testing, and environmental testing.

[0062] Furthermore, the main body 110 also includes a third box cover 150 and a fourth box cover 160. One side of the third box cover 150 is connected to the fourth box cover 160, and the other side is connected to the main box cover 140. The third box cover 150 is arranged opposite to the first box cover 120 or the second box cover 130. There are two observation windows 170, which are connected to the main box cover 140, the third box cover 150 and the fourth box cover 160 to enclose a sample 600 cavity, and the two observation windows 170 are located on opposite sides to facilitate observation of the sample 600.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An atmosphere environment test chamber, characterized in that: The atmosphere environment test chamber comprises: The cabin comprises a main body, a first box cover, and a second box cover. The main body is provided with a test cavity and an operation hole that are interconnected. One side of the test cavity has an opening, and the test cavity is used to be filled with a gas medium. The second box cover is provided with an installation cavity. The cabin has a first state and a second state. When the cabin is in the first state, the first box cover is connected to the main body to cover the opening. When the cabin is in the second state, the second box cover is connected to the main body to cover the opening, and the installation cavity is used to communicate with the test cavity. a pull rod, one end of which is connected to the stretching member, the other end of which is passed through the operating hole and extends into the test cavity, and the pull rod is used to move relative to the cabin along the extension direction of the operating hole under the drive of the stretching member; a fixture, accommodated in the test chamber, comprising a first connecting member and a second connecting member, wherein the first connecting member is connected to the main body, the second connecting member is connected to the pull rod, and the first connecting member and the second connecting member are used to connect two ends of the sample; and An extensometer is connected to the second box cover, and the extensometer is partially accommodated in the installation cavity, and the extensometer is used to be connected to the sample when the cabin is in the second state.

2. The atmosphere environment test chamber according to claim 1, characterized in that: The second box cover includes a connecting plate and a protrusion that are connected to each other. The connecting plate is detachably connected to the main body. The protrusion protrudes toward a side away from the main body relative to the connecting plate. The installation cavity is provided on the protrusion.

3. The atmosphere environment test chamber according to claim 1, characterized in that: The atmosphere environment test chamber also includes a heating component, which includes a heating coil and a power supply. The heating coil is arranged in the test chamber, and a first channel and a second channel are provided on the main body. The two ends of the heating coil are respectively connected to the power supply located outside the main body through the first channel and the second channel for heating.

4. The atmosphere environment test chamber according to claim 3, characterized in that: The heating coil is spirally wound along the extending direction of the operation hole, and the heating coil is sleeved on the sample.

5. The atmosphere environment test chamber according to claim 3, characterized in that: A delivery hole is constructed on the heating coil, and the atmosphere environment test chamber also includes a cooling generator, which is located outside the main body. The cooling generator is connected to the heating coil through the first channel and the second channel, and is used to deliver cooling medium to the delivery hole.

6. The atmosphere environment test chamber according to claim 1, characterized in that: The atmosphere environment test chamber also includes a temperature control component, which includes a temperature control generator and a temperature control tube. The temperature control tube is used to be arranged around the sample along the extension direction of the operation hole, and a temperature control channel is constructed in the temperature control tube. A third channel and a fourth channel are provided on the main body. The temperature control channel is connected to the temperature control generator located outside the main body through the third channel and the fourth channel respectively. The temperature control generator is used to alternately transport cold medium and hot medium to the temperature control channel.

7. The atmosphere environment test chamber according to claim 6, characterized in that: The two ends of the temperature control tube respectively have an inlet and an outlet connected to the temperature control channel. There are two temperature control tubes. The outlet of one of the two temperature control tubes is located on the same side as the inlet of the other, and the outlet of the other of the two temperature control tubes is located on the same side as the inlet of one.

8. The atmosphere environment test chamber according to any one of claims 1 to 7, characterized in that: The atmospheric environment test chamber also includes a pressure balance assembly, which is connected to the pull rod. The pressure balance assembly is used to apply a force to the pull rod so that the force applied by the tensile member to the pull rod in the extension direction of the operating hole is the same as the force applied by the pull rod to the sample.

9. The atmosphere environment test chamber according to claim 8, characterized in that: The pressure balancing assembly includes a piston sleeve, the main body includes a main box cover, the main box cover is used to connect with the first box cover or the second box cover, the operation hole is provided on the main box cover, the main box cover is provided with a matching cavity connected with the operation hole, the pull rod portion is passed through the matching cavity, the piston sleeve is sleeved on the pull rod, and the piston sleeve is accommodated in the matching cavity and abuts against the cavity wall of the matching cavity to separate the matching cavity into a first cavity and a second cavity, the second cavity is connected to the outside and is located on the side of the piston sleeve close to the clamp; In the extension direction of the operating hole, the product of the area difference between the end of the pull rod close to the sample and the sample and the air pressure in the test chamber is equal to the product of the area of ​​the side of the piston sleeve away from the clamp in the extension direction of the operating hole and the air pressure in the first cavity.

10. The atmosphere environment test chamber according to claim 9, characterized in that: The pressure balancing assembly further includes a gas conveying member. The main box cover is provided with a first gas delivery hole connected to the first cavity. The gas conveying member is used to introduce gas into the first cavity through the first gas delivery hole to adjust the air pressure in the first cavity.

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