Atmosphere environment test chamber

Abstract

The invention relates to an atmosphere environment test chamber. The atmosphere environment test chamber comprises a chamber body, a pull rod, a clamp and a pressure balance assembly; the cabin body comprises a main body and a main box cover, the main box cover is connected with the main body to define a test cavity, the test cavity is used for being full of a gas medium, and the main box cover is provided with an operation hole communicated with the test cavity; one end of the pull rod is connected to the stretching piece, the other end of the pull rod penetrates through the operation hole and extends into the test cavity, and the pull rod is driven by the stretching piece to move along the extension direction of the operation hole relative to the cabin body; the clamp is contained in the test cavity and comprises a first connecting piece and a second connecting piece, the first connecting piece is connected to the main body, the second connecting piece is connected to the pull rod, and the first connecting piece and the second connecting piece are used for connecting two ends of a sample; the pressure balance assembly is connected to the pull rod and is used for applying acting force to the pull rod, so that the acting force applied to the pull rod by the stretching piece in the extension direction of the operation hole is the same as the acting force applied to the sample by the pull rod.

Description

Technical Field

[0001] The 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 mines, wind energy, 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 a huge hydrogen-containing gas production capacity in the west. These hydrogen-containing gases need to be transported to eastern users 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. However, during the test of the existing atmosphere environment test chamber, due to the imbalance of pressure inside and outside the test chamber, it is easy to cause system errors, resulting in poor accuracy of the measurement results. Summary of the invention

[0003] Based on this, it is necessary to provide an atmosphere environment test chamber to address the technical problem that during the test in the existing atmosphere environment test chamber, due to the imbalance of pressure inside and outside the test chamber, it is easy to cause system errors, resulting in poor accuracy of measurement results.

[0004] An atmosphere environment test chamber, comprising:

[0005] The cabin body comprises a main body and a main box cover, wherein the main box cover is connected to the main body to enclose a test cavity, wherein the test cavity is used to be filled with a gas medium, and the main box cover is provided with an operation hole communicating with the test cavity;

[0006] A pull rod, one end of which is used to be 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 extending direction of the operating hole under the drive of the stretching member;

[0007] A clamp is accommodated in the test cavity, the clamp comprises 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, the first connecting member and the second connecting member are used to connect two ends of the sample; and,

[0008] A pressure balancing assembly is connected to the pull rod, and 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.

[0009] In one embodiment, the pressure balancing assembly includes a piston sleeve, a matching cavity connected to the operating hole is provided on the main box cover, the pull rod portion is inserted into 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 a side of the piston sleeve close to the clamp;

[0010] In the extension direction of the operating hole, the product of the area difference between one 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 chamber.

[0011] In one embodiment, the pressure balancing assembly further includes a gas conveying member, and the main box cover is provided with a first gas delivery hole connected to the first cavity, and the gas conveying member is used to introduce gas into the first cavity through the first gas delivery hole to adjust the gas pressure in the first cavity.

[0012] In one of the embodiments, in the extension direction of the operating hole, the area difference between the end of the pull rod close to the sample and the sample is equal to the area of ​​the side of the piston sleeve facing away from the fixture.

[0013] In one embodiment, a second gas delivery hole connected to the test cavity is provided on the main body, and the gas delivery member is used to deliver gas to the test cavity through the second gas delivery hole to make the gas pressure in the test cavity and the first cavity equal.

[0014] In one embodiment, the main box cover includes an end cover and a connecting tube, the end cover is connected to the main body, the operating hole is arranged on the end cover, the connecting tube is connected to the end cover, the matching cavity is arranged on the connecting tube, and the connecting tube is provided with a matching hole connected to the matching cavity, the pull rod passes through the operating hole, is passed through the matching cavity, and extends out of the main body through the matching hole.

[0015] 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 a power supply located outside the main body through the first channel and the second channel for heating.

[0016] 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.

[0017] 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.

[0018] 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 wound around the sample, 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 tube.

[0019] Beneficial effects:

[0020] An atmospheric environment test chamber provided by an embodiment of the present invention comprises a chamber body, a pull rod, a clamp and a pressure balance assembly; the chamber body comprises a main body and a main box cover, the main box cover is connected to the main body to enclose a test chamber, the test chamber is used to be filled with a gas medium, and the main box cover is provided with an operating hole connected to the test chamber; one end of the pull rod is used to be connected to a stretching member, the other end of the pull rod is passed through the operating hole and extends into the test chamber, the pull rod is used to move relative to the chamber body along the extension direction of the operating hole under the drive of the stretching member; the clamp is accommodated in the test chamber, the clamp comprises a first connecting member and a second connecting member, the first connecting member is connected to the main body and the second connecting member is connected to the pull rod, the first connecting member and the second connecting member are used to connect two ends of the sample; the pressure balance assembly 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 stretching 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. In the present application, the pull rod part is located in the test chamber. Since the test chamber is filled with gas medium, the pull rod will be affected by the force of the air pressure in the test chamber. The force applied to the pull rod by the pressure balance component can offset the force of the air pressure in the test chamber on the pull rod, so that the pull rod is balanced in force in a static state. When the tensile member pulls the pull rod, the force applied by the tensile member on the pull rod is equal to the force applied by the pull rod on the specimen, that is, no additional load is added to the specimen under test, which can prevent systematic errors caused by pressure imbalance inside and outside the atmosphere test chamber, thereby improving the accuracy of testing the specimen performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of an atmosphere test chamber provided by an embodiment of the present invention Figure 1 .

[0022] Figure 2 Schematic diagram of an atmosphere environment test chamber provided in one embodiment of the present invention Figure 2 .

[0023] Figure 3 Schematic diagram of an atmosphere environment test chamber provided in one embodiment of the present invention Figure 3 .

[0024] Figure 4 Schematic diagram of an atmosphere environment test chamber provided in one embodiment of the present invention Figure 4 .

[0025] Figure Number:

[0026] 100-cabin; 110-main body; 111-test cavity; 112-operating hole; 113-auxiliary hole; 140-main box cover; 141-matching cavity; 142-matching hole; 143-end cover; 144-connecting tube; 145-first cavity; 146-second cavity; 170-observation window; 210-pull rod; 220-clamp; 221-first connecting piece; 222-second connecting 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 delivery member; 530-first gas delivery hole; 540-second gas delivery hole; 600-sample. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0028] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] 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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] See also Figure 1 , Figure 1 Schematic diagram of an atmosphere environment test chamber provided in one embodiment of the present invention Figure 1An embodiment of the present invention provides an atmosphere environment test chamber, comprising a chamber 100, a tie rod 210, a fixture 220 and a pressure balance assembly 500; the chamber 100 comprises a main body 110 and a main cover 140, the main cover 140 is connected to the main body 110 to enclose a test chamber 111, the test chamber 111 is used to be filled with a gas medium, and the main cover 140 is provided with an operating hole 112 connected to the test chamber 111; one end of the tie rod 210 is used to be connected to a stretching member, and the other end of the tie rod 210 is passed through the operating hole 112 and extends into the test chamber 111, and the tie rod 210 is used to move relative to the chamber 100 along the operating hole under the drive of the stretching member. The test cavity 111 is provided with a clamp 220, 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 pressure balance assembly 500 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 sample 600.

[0034] Specifically, the tension rod 210 in the present application is partially located in the test chamber 111. Since the test chamber 111 is filled with gas medium, the tension rod 210 will be subjected to the force of the gas pressure in the test chamber. The pressure balance component 500 applies a force to the tension rod 210 to offset the force of the gas pressure in the test chamber 111 on the tension rod 210, so that the tension rod 210 is balanced in a static state, so that when the tension member pulls the tension rod 210, the force applied by the tension member to the tension rod 210 is equal to the force applied by the tension member to the sample 600, that is, no additional load is added to the sample 600 under test, and the system error caused by the imbalance of pressure inside and outside the atmosphere test chamber can be prevented, thereby improving the accuracy of testing the performance of the sample 600. Among them, the sample 600 is metal. This embodiment is described by taking hydrogen as the gas medium as an example, but it is not limited to this, and it can also be nitrogen, natural gas, etc.

[0035] See also Figure 1In one embodiment, the pressure balance assembly 500 includes a piston sleeve 510, a matching cavity 141 connected to the operating hole 112 is provided on the main box cover 140, the pull rod 210 is partially inserted into 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 and abuts against the cavity wall of the matching cavity 141 to separate the matching 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 clamp 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 clamp 220 in the extension direction of the operating hole 112 and the air pressure in the first cavity 145.

[0036] 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 ​​one 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 gas 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 on 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 second thrust F2 toward the clamp 220 is applied to the piston sleeve 510 through the air pressure in the second cavity 146, that is, the 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 internal and external pressure imbalance in the atmosphere environment test chamber and improving the accuracy of the test results.

[0037] The main case 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 .

[0038] It should be noted that the pull rod 210 moves a short distance in the operating hole 112 , so the effect on the change of the air pressure in the second cavity 146 is small and can be ignored.

[0039] 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 stretching 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 to the pull rod 210 by the stretching member.

[0040] See also Figure 1 In one embodiment, the pressure balancing assembly 500 further includes a gas delivery member 520. A first gas delivery hole 530 communicating with the first cavity 145 is provided on the main box cover 140. 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.

[0041] Specifically, after the sample 600 is installed, the first connecting member 221 needs to be connected to the pull rod 210. Due to the different sizes of the sample 600, the pull rod 210 will move in the extension direction of the operation hole 112, so that the position of the piston sleeve 510 relative to the matching cavity 141 changes, thereby changing the volume of the first cavity 145. The gas conveying member 520 introduces gas into the first cavity 145 through the first gas delivery hole 530, so that the gas pressure in the first cavity 145 can be adjusted to ensure that the second thrust F2 is equal to the first thrust F1, so that the pull rod 210 achieves pressure balance on both ends, thereby improving the adaptability and reliability of the atmosphere environment test chamber.

[0042] See also Figure 1 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 fixture 220, so that 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.

[0043] See also Figure 1 In one embodiment, the main body 110 is provided with a second gas delivery hole 540 connected to the test chamber 111, and the gas delivery member 520 is used to deliver gas to the test chamber 111 through the second gas delivery hole 540, so that the gas pressure in the test chamber 111 and the first chamber 145 are equal, avoiding the situation where the accuracy of the test result is affected by the error in the gas pressure measurement value, and improving the reliability of the atmosphere test chamber. It should be noted that the gas delivery member 520 delivers hydrogen medium, so that the sample 600 can be tested in a hydrogen environment.

[0044] See also Figure 1In one embodiment, the main box cover 140 includes an end cover 143 and a connecting tube 144, the end cover 143 is connected to the main body 110, the operation hole 112 is provided on the end cover 143, the connecting tube 144 is connected to the end cover 143, the matching cavity 141 is provided on the connecting tube 144, and the connecting tube 144 is provided with a matching hole 142 communicating with the matching cavity 141, the pull rod 210 passes through the operation hole 112, is passed through the matching cavity 141, and extends out of the main body 110 through the matching hole 142, so as to be connected to the stretching member outside the main body 110. The pull rod 210 is sealed and connected to the hole wall of the matching hole 142.

[0045] Furthermore, a protrusion is provided on one side of the end cover 143 facing the connecting tube 144 . The protrusion is received in the matching cavity 141 and connected to the cavity wall of the matching cavity 141 to ensure connection stability.

[0046] See also Figure 2 , Figure 2 Schematic diagram of an atmosphere environment test chamber provided in one embodiment of the present invention Figure 2 In one embodiment, the atmosphere environment test chamber further includes a heating assembly 300, the heating assembly 300 includes a heating coil 310 and a power source, the heating coil 310 is disposed in the test chamber 111, a first channel 320 and a second channel 330 are disposed on the main body 110, and both ends of the heating coil 310 are respectively connected to a power source located outside the main body 110 through the first channel 320 and the second channel 330 for heating.

[0047] Specifically, in the present application, a heating coil 310 is disposed 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 the test efficiency.

[0048] participate Figure 2 In order to accelerate the performance degradation process of the material in the atmosphere environment and thus shorten the experimental time, in one embodiment, the heating coil 310 is spirally wound along the extension direction of the operating hole 112, and the heating coil 310 is sleeved on the sample 600, so that the surface of the sample 600 is quickly heated up through the skin effect, solving the problems of slow heating speed, long heating time and uneven temperature when heating by resistance wire in traditional experiments. In addition, for some workpieces working in a high-temperature atmosphere environment, the working conditions can be accurately simulated to truly realize the actual working conditions of the raw material process molding.

[0049] participate Figure 2In 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 transport 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.

[0050] See also Figure 3 , Figure 3 Schematic diagram of an atmosphere environment 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. The main body 110 is provided with a third channel and a fourth channel. 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 chamber 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 reproducible test environment guarantee for the test reproduction of the material service environment and the in-situ testing 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.

[0051] 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 disposed on the main body 110 .

[0052] See also 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, the number of the temperature control tubes 410 is two, 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.

[0053] Specifically, the temperature control generating element is used to alternately deliver cold medium and hot medium to the inlet 411 of the temperature control channel, and the cold medium and hot medium flow back to the temperature control generating element via the outlet 412. By locating the inlet 411 and the outlet 412 of the two temperature control tubes 410 on opposite sides, the uniformity of the temperature in the test chamber 111 can be improved, thereby improving the accuracy of the test results.

[0054] See also Figure 4 , Figure 4Schematic diagram of an atmosphere environment test chamber provided in one embodiment of the present invention Figure 4 In one embodiment, the main body 110 further includes an observation window 170 , which is made of high-pressure resistant and high-strength glass, so that the deformation and changes of the sample 600 in the test chamber 111 during loading and environmental testing can be observed through the observation window 170 .

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An atmosphere environment test chamber, characterized in that: The atmosphere environment test chamber comprises: The cabin body comprises a main body and a main box cover, wherein the main box cover is connected to the main body to enclose a test cavity, wherein the test cavity is used to be filled with a gas medium, and the main box cover is provided with an operation hole communicating with the test cavity; A pull rod, one end of which is used to be 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 extending direction of the operating hole under the drive of the stretching member; A clamp is accommodated in the test cavity, the clamp comprises 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, the first connecting member and the second connecting member are used to connect two ends of the sample; and, A pressure balancing assembly is connected to the pull rod, and 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.

2. The atmosphere environment test chamber according to claim 1, characterized in that: The pressure balance assembly includes a piston sleeve, a matching cavity connected to the operating hole is provided on the main box cover, the pull rod portion is inserted into 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 a side of the piston sleeve close to the clamp; In the extension direction of the operating hole, the product of the area difference between one 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 chamber.

3. The atmosphere environment test chamber according to claim 2, characterized in that: The pressure balance assembly also 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 gas pressure in the first cavity.

4. The atmosphere environment test chamber according to claim 3, characterized in that: In the extending direction of the operating hole, the area difference between the end of the pull rod close to the sample and the sample is equal to the area of ​​the side of the piston sleeve away from the fixture.

5. The atmosphere environment test chamber according to claim 4, characterized in that: The main body is provided with a second gas delivery hole connected to the test cavity, and the gas delivery member is used to deliver gas to the test cavity through the second gas delivery hole to make the gas pressure in the test cavity and the first cavity equal.

6. The atmosphere environment test chamber according to claim 2, characterized in that: The main box cover includes an end cover and a connecting tube, the end cover is connected to the main body, the operating hole is arranged on the end cover, the connecting tube is connected to the end cover, the matching cavity is arranged on the connecting tube, and the connecting tube is provided with a matching hole connected to the matching cavity, the pull rod passes through the operating hole, is passed through the matching cavity, and extends out of the main body through the matching hole.

7. The atmosphere environment test chamber according to any one of claims 1 to 6, 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 a power supply located outside the main body through the first channel and the second channel for heating.

8. The atmosphere environment test chamber according to claim 7, 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.

9. The atmosphere environment test chamber according to claim 7, characterized in that: A delivery hole is configured 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.

10. The atmosphere environment test chamber according to any one of claims 1 to 6, 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 wound around the sample, 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 tube.

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