Temperature control and flow guiding device, gas pressure control device and gas permeation testing system

Abstract

The present disclosure provides a temperature control and flow guiding device, a gas pressure control device and a gas permeation test system. Among them, a temperature control and flow guiding device includes a flow guiding chamber, which is a hollow structure with openings at both ends; the flow guiding chamber is symmetrically arranged inside a sealable environmental chamber; a heating element and a cooling element are arranged on the flow guiding chamber; the flow guiding chamber is also connected to a first airflow generating device and a second airflow generating device, the first airflow generating device and the second airflow generating device are symmetrically arranged on the flow guiding chamber, and the first airflow generating device and the second airflow generating device are used to suck out the first airflow and the second airflow of the flow guiding chamber and blow them to the environmental chamber accordingly, so that the first airflow and the second airflow circulate between the flow guiding chamber and the environmental chamber.

Description

Technical Field

[0001] The present invention belongs to the field of material testing instruments, and in particular relates to a temperature control and flow guiding device, a gas pressure control device and a gas permeation testing system. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] Ambient temperature is an important test parameter in the test process of gas permeability instruments such as differential pressure gas permeability tester, oxygen permeability tester and water vapor permeability tester, so controlling the test environment temperature is an important function of these instruments.

[0004] The inventors have discovered that the airflow generated by the existing temperature control device has poor fluidity in the environmental chamber of the breathable instrument, resulting in low control efficiency of the temperature around the samples in the breathable instrument, and further resulting in poor controllability of the temperature around the samples in the breathable instrument. This may ultimately cause large fluctuations in the test data of the breathable instrument, especially when multiple samples are tested at the same time, making it even more difficult to ensure efficient regulation of the ambient temperature of all samples.

[0005] In addition, when conducting tests on permeable instruments such as differential pressure gas permeometers, oxygen permeability testers, and water vapor permeability testers, the stability of the pressure regulation on one side of the sample is directly related to the stability of the test results. The traditional pressure regulation method is to connect a gas storage tank to the test cavity on one side of the sample, and control the pressure of the upper cavity by controlling the pressure of the gas storage tank. The inventors also found that the pressure of such a gas storage tank is difficult to control, and it requires experience to judge the filling time of the gas storage tank. When the pressure of the test cavity requires adjustment, it is necessary to manually explore the filling time of a gas storage tank, which results in low pressure regulation efficiency and poor stability of the test results. Summary of the invention

[0006] A first aspect of the present disclosure provides a temperature control and flow guiding device, which can efficiently adjust the temperature in an environmental chamber.

[0007] A technical solution of a temperature control and flow guiding device according to the first aspect of the present disclosure is:

[0008] A temperature control and flow guiding device disclosed herein comprises:

[0009] A flow guide bin, the flow guide bin is a hollow structure with openings at both ends; the flow guide bin is symmetrically arranged inside a sealable environmental bin; a heating element and a cooling element are arranged on the flow guide bin; the flow guide bin is also connected to a first airflow generating device and a second airflow generating device, the first airflow generating device and the second airflow generating device are symmetrically arranged on the flow guide bin, and the first airflow generating device and the second airflow generating device are used to suck out the first airflow and the second airflow of the guide bin correspondingly and blow them to the environmental bin, so that the first airflow and the second airflow circulate between the flow guide bin and the environmental bin.

[0010] A second aspect of the present disclosure provides a gas pressure control device that can improve pressure regulation efficiency.

[0011] The technical solution of a gas pressure control device according to the second aspect of the present disclosure is:

[0012] A gas pressure control device disclosed herein comprises:

[0013] An air intake pipeline, the air intake pipeline is connected to an air source, and an air intake valve is arranged on the air intake pipeline;

[0014] An exhaust pipeline, the exhaust pipeline is connected to the first negative pressure device, and an exhaust valve is provided on the exhaust pipeline;

[0015] The air intake pipeline and the exhaust pipeline are combined to form a main pipeline, and the main pipeline is connected to the test chamber; a pressure sensor is arranged on the main pipeline;

[0016] The intake valve, exhaust valve and pressure sensor are all connected to the second microprocessor; the pressure sensor is used to detect the pressure value in the test chamber in real time and transmit it to the second microprocessor; the second microprocessor is used to compare the received pressure value with the given pressure value to control the on and off of the intake valve and the exhaust valve.

[0017] A third aspect of the present disclosure provides a gas permeation testing system that can improve the accuracy of test results.

[0018] The technical solution of a gas permeability detection system according to the third aspect of the present disclosure is:

[0019] A gas permeability detection system, comprising:

[0020] Sealable environmental chamber;

[0021] The environmental chamber is provided with the temperature control and flow guiding device described above;

[0022] Or / and the environmental chamber is provided with the above-mentioned gas pressure control device.

[0023] The beneficial effects of the present disclosure are:

[0024] (1) The gas flow in a temperature control and flow guiding device disclosed in the present invention flows along the flow guiding chamber, and the temperature in the environment chamber is quickly adjusted by the gas flow.

[0025] (2) A gas pressure control device disclosed in the present invention uses a second microprocessor to compare the pressure value in the test chamber detected by the pressure sensor with the given pressure value. If the former is smaller than the latter, the air inlet valve is controlled to open so that the gas in the gas source enters the test chamber until the pressure value in the test chamber reaches the given pressure value, and then the air inlet valve is controlled to close. If the former is larger than the latter, the air exhaust valve is controlled to open and the vacuum generator is used to evacuate air until the pressure value in the test chamber reaches the given pressure value, and then the air exhaust valve is controlled to close. This improves the efficiency of pressure regulation and the stability of test results.

[0026] (3) The air permeability detection system disclosed in the present invention has a temperature control and flow guiding device or / gas pressure control device, and also has an automatic sample clamping structure, thereby realizing automatic compression of the sample and automatic entry and exit of the sample into the environmental chamber. The first test chamber and the second test chamber are driven by the driving device to move relative to each other, so that the sample is well sealed and the compression degree is consistent, thereby improving the stability of the test data and the detection accuracy, realizing the automation of the entire clamping process, improving the efficiency of clamping the sample, and simplifying the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure.

[0028] Figure 1 It is a structural principle diagram of a temperature control and flow guiding device provided in an embodiment of the present disclosure.

[0029] Figure 2 It is a schematic diagram of the overall structure of a temperature control and flow guiding device provided in an embodiment of the present disclosure.

[0030] Figure 3 It is a schematic diagram of the structure of a gas pressure control device provided in an embodiment of the present disclosure.

[0031] Figure 4 It is a front view of a sample automatic clamping structure in an air permeability detection system provided by an embodiment of the present disclosure.

[0032] Figure 5 It is a left view of an automatic sample clamping structure in an air permeability detection system provided by an embodiment of the present disclosure.

[0033] Figure 6 It is a left view of a second test cavity extending out of a sample automatic clamping structure in an air permeability detection system provided by an embodiment of the present disclosure.

[0034] Figure 7 It is a front view of another automatic sample clamping structure in a permeability detection system provided by an embodiment of the present disclosure.

[0035] Figure 8 It is a left view of another automatic sample clamping structure in an air permeability detection system provided by an embodiment of the present disclosure.

[0036] Among them, 1-1. Environmental chamber, 1-2. Guide chamber, 1-3. Temperature sensor, 1-4. First fan, 1-5. First heat sink, 1-6. Refrigeration element, 1-7. Second heat sink, 1-8. Second fan, 1-9. Air flow, 1-10. Heating element, 1-11. Environmental chamber, 1-12. Air outlet, 2-1. First test chamber, 2-2. Screw, 2-3. Cylinder i, 2-4. Sealing ring, 2-5. Sample, 2-6. Second test chamber, 2-7. Guide rail, 2-8. First fixed plate, 2-9. Cylinder ii, 2-10. Slider, 2-11. Second fixed plate; 3. Inlet pipe; 4. Outlet pipe; 5. Main pipe; 6. Inlet valve; 7. Outlet valve; 8. Second negative pressure device; 9. Pressure sensor. DETAILED DESCRIPTION

[0037] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present disclosure belongs.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Terminology explanation:

[0040] Environmental chamber: a cavity space with controllable airflow, air pressure, temperature or humidity.

[0041] Embodiment 1

[0042] In this embodiment, the first airflow generating device and the second airflow generating device are implemented by fans.

[0043] It should be noted that the airflow generating device may also be implemented by using other existing structures.

[0044] A temperature control and flow guiding device of this embodiment includes:

[0045] A flow guide bin, the flow guide bin is a hollow structure with openings at both ends; the flow guide bin is symmetrically arranged inside a sealable environmental bin; a heating element and a cooling element are arranged on the flow guide bin; the flow guide bin is also connected to a first airflow generating device and a second airflow generating device, the first airflow generating device and the second airflow generating device are symmetrically arranged on the flow guide bin, and the first airflow generating device and the second airflow generating device are used to suck out the first airflow and the second airflow of the guide bin correspondingly and blow them to the environmental bin, so that the first airflow and the second airflow circulate between the flow guide bin and the environmental bin.

[0046] like Figure 1 and Figure 2 As shown, the guide chamber 1-2 is connected to the first heat sink 1-5, and the guide chamber 1-2 is installed on the first heat sink 1-5. The first heat sink 1-5 is arranged in the environmental chamber 1-11, and the guide chamber 1-2 is provided with a cooling element 1-6 and a heating element 1-10. The airflow generated by the cooling element 1-6 and the heating element 1-10 enters the guide chamber 1-2 through diffusion; the guide chamber 1-2 is provided with a first fan 1-4, and the first fan 1-4 is used to suck the airflow of the guide chamber and blow it to the environmental chamber 1-11, so that the airflow circulates between the guide chamber 1-2 and the environmental chamber 1-10.

[0047] The cooling element and the heating element are both connected to the first microprocessor, and the first microprocessor is connected to the temperature sensor 1-3. The temperature sensor is used to detect the temperature in the environmental chamber and transmit it to the first microprocessor, and then the first microprocessor controls the working status of the cooling element and the heating element.

[0048] In one embodiment, two temperature sensors are disposed in the environmental chamber and are fixed on the first test cavity and the second test cavity respectively.

[0049] In an optional embodiment, a temperature sensor is disposed in the environmental chamber and is fixed on the first test cavity or the second test cavity.

[0050] In a specific implementation, the temperature sensor is located around the test cavity, and can be fixed by a fixing member or suspended to detect the air temperature around the first test cavity and the second test cavity; the height of the temperature sensor is between the height of the first test cavity and the height of the second test cavity, and the optimal solution is close to the height of the sample when the instrument is working. The temperature sensor is located at the center of the first test cavity and the second test cavity.

[0051] In one embodiment, a second heat sink 1-7 is installed on the refrigeration element 1-6.

[0052] In another embodiment, a second heat sink 1-7 provided with a second fan 1-8 is installed on the refrigeration element 1-6.

[0053] In another embodiment, the heating element is an electric heating block.

[0054] The refrigeration element is a refrigeration semiconductor block or a refrigeration tube.

[0055] Specifically, a refrigerant is arranged in the refrigeration pipe, and refrigeration is achieved by evaporation-compression-condensation-throttling of the refrigerant to absorb heat.

[0056] The refrigeration element can also be implemented in the form of refrigeration used in air conditioning.

[0057] In a specific implementation, the guide bin includes a horizontal bin, a first vertical bin and a second vertical bin; one end of the first vertical bin is connected to the horizontal bin, and the other end is an opening structure and is a first air inlet; one end of the second vertical bin is connected to the horizontal bin, and the other end is an opening structure and is a second air inlet.

[0058] In another embodiment, the horizontal bin is arranged on the inner side of the top wall of the environmental bin, and the first vertical bin and the second vertical bin are respectively arranged on the inner sides of two walls connected to the top wall.

[0059] In an optional embodiment, the horizontal bin is arranged on the center line of the inner side of the top wall of the environmental bin, and the first vertical bin and the second vertical bin are respectively arranged on the center lines of the inner sides of two walls connected to the top wall.

[0060] For example: Figure 1 As shown, the guide chamber surrounds the left and right sides of the environment chamber and the three sides of the rear side of the closed cavity. The guide chambers on both sides of the environment chamber are equipped with heating elements, such as heating semiconductor blocks, and the guide chamber on the rear side of the environment chamber is equipped with cooling elements. The airflow in the guide chamber and the equipment environment chamber is exchanged through the air outlet of the guide chamber and the first heat sink. The airflow direction is as follows Figure 1 shown.

[0061] It should be noted that the structure of the diversion bin may also be in other hollow structural forms, such as a cylindrical hollow structure, a rectangular hollow structure, or a hollow structure of other shapes, which will not affect the performance of the diversion bin.

[0062] Specifically, the two first fans 1-4 suck the gas in the guide chamber 1-2 out of the guide chamber 1-2, blow it to the environmental chamber 1-11, and gradually diffuse it. Due to the need for air circulation, it is divided into two paths and enters the air outlets 1-12 on both sides. It enters the first heat sink 1-5 in the guide chamber along the direction indicated by the arrow, and then is sucked out by the first fan 1-4 and blown to the environmental chamber 1-11.

[0063] In this way, the air flow circulates between the guide chamber and the environmental chamber, and the gas serves as a carrier for transferring heat and humidity. The air flow flows through a wide range, thereby improving the temperature control accuracy and efficiency of the environmental chamber.

[0064] The temperature sensor of this embodiment detects the temperature value in real time. When the temperature is lower than the set temperature value, the first microprocessor controls the heating element to heat; when the temperature is higher than the set temperature value, the first microprocessor controls the refrigeration element to cool. During the temperature control process, the airflow between the environmental chamber and the diversion chamber is constantly circulating.

[0065] Embodiment 2

[0066] like Figure 3 As shown, a gas pressure control device of this embodiment includes:

[0067] An air intake pipeline 3, the air intake pipeline 3 is connected to an air source, and an air intake valve 6 is provided on the air intake pipeline 3;

[0068] An exhaust pipeline 4, wherein the exhaust pipeline 4 is connected to a first negative pressure device 8, and an exhaust valve 7 is provided on the exhaust pipeline 4;

[0069] The air intake pipeline 3 and the exhaust pipeline 4 merge to form a main pipeline 5, and the main pipeline 5 is connected to the test chamber; a pressure sensor 9 is arranged on the main pipeline 5;

[0070] The intake valve, exhaust valve and pressure sensor are all connected to the second microprocessor; the pressure sensor is used to detect the pressure value in the test chamber in real time and transmit it to the second microprocessor; the second microprocessor is used to compare the received pressure value with the given pressure value to control the on and off of the intake valve and the exhaust valve.

[0071] If the received pressure value is less than the given pressure value, the second microprocessor is used to control the air inlet valve to open, so that the gas in the air source enters the test chamber, until the pressure value in the test chamber reaches the given pressure value, then the air inlet valve is controlled to close;

[0072] If the received pressure value is greater than the given pressure value, the second microprocessor is used to control the exhaust valve to open and the vacuum generator to evacuate air until the pressure value in the test chamber reaches the given pressure value and then controls the exhaust valve to close.

[0073] In a specific implementation, the exhaust pipe and the intake pipe are connected via a three-way valve.

[0074] In a specific implementation, both the intake valve and the exhaust valve are one-way valves.

[0075] The first negative pressure device may be a vacuum pump, or a vacuum generator or other device capable of creating a vacuum.

[0076] This embodiment uses a second microprocessor to compare the pressure value in the test chamber detected by the pressure sensor with the given pressure value. If the former is less than the latter, the air inlet valve is controlled to open, so that the gas in the gas source enters the test chamber until the pressure value in the test chamber reaches the given pressure value, and then the air inlet valve is controlled to close; if the former is greater than the latter, the exhaust valve is controlled to open and the vacuum generator is used to evacuate air until the pressure value in the test chamber reaches the given pressure value, and then the exhaust valve is controlled to close; the efficiency of pressure regulation and the stability of test results are improved.

[0077] Embodiment 3

[0078] This embodiment provides a gas permeability detection system, including:

[0079] Sealable environmental chamber;

[0080] The environment chamber is equipped with Figure 1 and Figure 2 The temperature control and flow guiding device shown.

[0081] Embodiment 4

[0082] This embodiment provides a gas permeability detection system, including:

[0083] Sealable environmental chamber;

[0084] The environment chamber is equipped with Figure 3 Gas pressure control device shown.

[0085] Embodiment 5

[0086] In this embodiment, based on Example 3 or Example 4, at least one workstation is provided in the environmental chamber, and each workstation is provided with an automatic sample clamping structure.

[0087] like Figure 4 and Figure 5 As shown, the automatic sample clamping structure of this embodiment includes:

[0088] A first test chamber 2-1 and a second test chamber 2-6; a sample 2-5 is disposed between the first test chamber 2-1 and the second test chamber 2-6; the first test chamber 2-1 and the second test chamber 2-6 are disposed above and below the sample 2-5, respectively;

[0089] Before clamping the sample, the first driving device is used to drive the first test cavity to move upward, and the second driving device is used to move the second test cavity in the horizontal direction, so that the first test cavity and the second test cavity are separated and the second test cavity extends out of the environmental chamber;

[0090] When the sample is placed in the second test chamber, the second driving device is used to drive the second test chamber to retract into the environmental chamber, and the first driving device is used to drive the first test chamber to move vertically downward, so that the first test chamber and the second test chamber are closed to compress the sample.

[0091] During the clamping process, the second driving device drives the second test cavity to move in the horizontal direction, while the first driving device drives the first test cavity to move downward in the vertical direction by a first preset distance to close the first test cavity and the second test cavity and to compress the sample;

[0092] When the sample test is completed, the first driving device drives the first test chamber to move upward in the vertical direction by a preset distance, and the second driving device drives the second test chamber to move horizontally by a preset distance, thereby finally realizing automatic compression of the sample and automatic entry and exit of the environmental chamber.

[0093] The first preset distance is a distance that can be preset manually, and the distance value can close the test cavity formed by the first test cavity and the second test cavity and simultaneously achieve the purpose of compacting the sample.

[0094] In a specific implementation, both the first driving device and the second driving device are connected to a controller, and the controller is used to output control signals to the first driving device and the second driving device respectively.

[0095] It should be noted that when the first drive device and the second drive device are both cylinder structures, their telescopic amounts are fixed or manually pre-adjusted parameters when the products leave the factory. During operation, the cylinder can be operated by simply turning on the switch between the cylinder and the air source.

[0096] In this embodiment, a sealing device is further provided between the first test cavity and the second test cavity.

[0097] like Figure 4 As shown, the sealing device of this embodiment is a sealing ring 2-4.

[0098] In a specific implementation, the sealing ring 2 - 4 is arranged on the first test cavity or the second test cavity.

[0099] In an optional embodiment, the sealing device includes a first seal and a second seal, the first seal and the second seal are respectively disposed on the first test cavity and the second test cavity, and the first seal and the second seal cooperate to seal the sample.

[0100] In this embodiment, a sealing device is provided between the first test cavity and the second test cavity, so that the sealing degree around the sample is uniform, and the gas on one side is prevented from leaking laterally from the periphery of the sample into the other side, thereby improving the reliability of the sample sealing and further improving the test efficiency and accuracy.

[0101] It should be noted that sealing grease may be provided on the edges of the first test cavity and the second test cavity that are arranged opposite to each other, and the sealing grease is used to seal the first test cavity and the second test cavity.

[0102] In this embodiment, both the first driving device and the second driving device are implemented by cylinders.

[0103] Specifically, Figure 5 As shown, the first driving device is implemented by cylinder i2-3, and the first driving device drives the first test cavity to move in the vertical direction; the second driving device is implemented by cylinder ii2-9, and the second driving device drives the second test cavity to move in the horizontal direction.

[0104] In order to ensure that the force on the sample is uniform when the gap between the first test cavity and the second test cavity is closed, the driving shaft of the first driving device is symmetrically connected to the first test cavity. Figure 5 As shown, the driving shaft of the first driving device can be symmetrically connected at both ends of the first test cavity, so that the first test cavity is also subjected to uniform force during the movement.

[0105] It should be noted that the first driving device and the second driving device may also be implemented by any other existing driving structure forms, such as a motor, an electric cylinder or a hydraulic cylinder.

[0106] In this embodiment, it is taken as an example that the first driving device is implemented by cylinder i and the second driving device is implemented by cylinder ii, and cylinder i and cylinder ii are fixed to the first fixing plate 2-8:

[0107] The first fixing plate 2-8 is disposed below the second testing cavity 2-6.

[0108] Specifically, in order to save equipment space, the cylinder i2-3 is arranged on both sides of the first test cavity 2-1, and the cylinder i2-3 is connected to the first test cavity 2-1 through screws 2-2.

[0109] In a specific implementation, a sliding device is further provided between the first fixing plate and the second testing cavity.

[0110] The sliding device is used to realize the horizontal movement of the second test cavity on the first fixed plate.

[0111] In a specific implementation, the sliding device can be implemented using an existing structure, such as:

[0112] The sliding device includes a guide structure and a sliding structure. The guide structure is arranged on the first fixed plate, and the sliding structure is arranged at the bottom end of the second test cavity. The sliding structure is used to drive the second test cavity to move horizontally along the guide structure under the drive of the cylinder ii.

[0113] In this embodiment, the guide structure can be a guide rail, such as Figure 5As shown, the sliding structure is implemented using sliders 2-10.

[0114] Among them, the structure in which the guide rail and the slider 2-10 cooperate is small and light, and is easier to implement.

[0115] In another embodiment, the second test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the second test cavity to the surface of the second test cavity.

[0116] In an optional embodiment, the first test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the first test cavity to the surface of the first test cavity.

[0117] Specifically, the second negative pressure device may be a vacuum pump, or a device capable of creating a vacuum, such as a vacuum generator.

[0118] The vacuum pump is connected to the first test cavity or the second test cavity through a pipeline. The first test cavity or the second test cavity has an air hole. The first test cavity or the second test cavity is evacuated to form a gas negative pressure area on the surface of the first test cavity or the second test cavity. The sample to be tested is placed on the surface of the first test cavity or the second test cavity and adsorbed by the negative pressure. The test is adhered to the surface of the first test cavity or the second test cavity.

[0119] In this embodiment, if Figure 6 As shown, the automatic sample clamping structure is arranged in the environmental chamber 1-1. Driven by the cylinder ii2-9, the second test chamber 2-6 moves along the guide rail and is placed outside the environmental chamber 1-1. The sample 2-5 is placed in the designated position of the second test chamber 2-6. The cylinder ii2-9 drives the second test chamber 2-6 back to the inside of the tester, and the negative pressure device is started to adsorb the sample. The sample is adsorbed and adhered to the surface of the second test chamber 2-6. When the second test chamber 2-6 is translated and retracted to the bottom of the first test chamber 2-1. The cylinder i2-3 drives the first test chamber 2-1 to move downward and close with the second test chamber 2-6. The first test chamber 2-1 is provided with a sealing ring 2-4. The closing of the first test chamber 2-1 and the second test chamber 2-6 causes the sealing ring to press and seal the periphery of the sample, and the automatic sample packaging is completed.

[0120] It should be noted that the guide structure may also be implemented by a lead screw, and the sliding structure may be implemented by a nut.

[0121] In an optional embodiment, when the second driving device is used to drive the second test cavity to move in the horizontal direction, the second driving device is also a driving mechanism with a guide, and there is no need to provide a sliding device between the first fixing plate and the second test cavity.

[0122] Specifically, the guided driving mechanism can be implemented by driving a guided cylinder, wherein the guided cylinder has two telescopic rods, which is different from an ordinary cylinder having only one telescopic rod.

[0123] It should be noted that the guided driving mechanism can also be realized by using a guided electric cylinder drive.

[0124] The specific working principle of the clamping structure of this embodiment is:

[0125] Before testing the sample, the first drive device drives the first test cavity to move upward, and the upper and lower cavities are separated. The second drive device drives the second test cavity to move horizontally and extend to the outside of the test instrument. After the sample is placed in the second test cavity, the second drive device drives the second test cavity to retract into the environmental chamber of the test instrument. At the same time, the first test cavity moves vertically downward to press the sample, realizing automatic cavity entry, automatic clamping and pressing of the sample;

[0126] When the sample test is completed, the first drive device drives the first test chamber to move upward in the vertical direction to separate the first test chamber from the second test chamber; the second drive device drives the second test chamber and the sample to extend outside the test instrument environment chamber, so that the sample can be automatically taken out of the chamber, and the test personnel can take the sample away. The permeability parameters of the sample are obtained based on the amount of gas that permeates the sample detected by the instrument.

[0127] The opening and closing of the first test cavity and the second test cavity of the present embodiment are driven by a driving device, the sample is well sealed and the compression degree is consistent, thereby achieving the purpose of stable test data and high detection accuracy; the automatic sample clamping structure of the present embodiment realizes the automation of the clamping process of the entire gas permeation test system, improves the efficiency of clamping samples, has a high degree of automation, and is easy to operate.

[0128] Embodiment 6

[0129] like Figure 7 and Figure 8 As shown, different from the fifth embodiment, in the automatic sample clamping structure of the gas permeation test system of this embodiment, the cylinder i2-3 is fixed on the second fixing plate 2-11, and the cylinder ii2-9 is fixed on the first fixing plate 2-8. Among them, the first fixing plate 2-8 is arranged below the second test cavity 2-6, and the second fixing plate 2-11 is arranged above the first test cavity 2-1.

[0130] Embodiment 7

[0131] In this embodiment, based on Example 3 or Example 4, at least one workstation is provided in the environmental chamber, and each workstation is provided with a sample automatic clamping structure. The sample automatic clamping structure of this embodiment includes:

[0132] A first test chamber and a second test chamber, wherein a sample is disposed between the first test chamber and the second test chamber; the first test chamber and the second test chamber are disposed above and below the sample, respectively;

[0133] A first driving device connected to the first test chamber;

[0134] a second driving device connected to the second test chamber;

[0135] Before clamping the sample, the second driving device is used to drive the second test cavity to move downward by a second preset distance, and the first driving device is used to drive the first test cavity to move in a horizontal direction, so that the first test cavity and the second test cavity are separated and the first test cavity extends out of the environmental chamber;

[0136] When the sample is adsorbed to the first test cavity, the first driving device is used to drive the first test cavity to retract into the environmental chamber, and at the same time, the second test cavity moves vertically upward by a second preset distance under the drive of the second driving device, so that the first test cavity and the second test cavity are closed to compress the sample.

[0137] The second preset distance is a distance that can be preset manually, and the distance value can close the test cavity formed by the first test cavity and the second test cavity and simultaneously achieve the purpose of compacting the sample.

[0138] In a specific embodiment, a sliding device is provided at the top of the first test cavity, and the first driving device is used to drive the first test cavity to move in a horizontal direction along the sliding device.

[0139] The sliding device of this embodiment has the same structure as the sliding device described in the fifth embodiment, and will not be described again here.

[0140] In an optional embodiment, the first drive device is a belt-guided drive device.

[0141] Specifically, the guided driving device can be implemented by driving a guided cylinder, wherein the guided cylinder has two telescopic rods, which is different from an ordinary cylinder having only one telescopic rod.

[0142] It should be noted that the guided driving mechanism can also be realized by using a guided electric cylinder drive.

[0143] In a specific implementation, a sealing device is further provided between the first test cavity and the second test cavity.

[0144] The sealing device of this embodiment has the same structure as the sealing device in the fifth embodiment, and will not be described again here.

[0145] In a specific embodiment, the first test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the first test cavity to the surface of the first test cavity.

[0146] In an optional embodiment, the second test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the second test cavity to the surface of the second test cavity.

[0147] Specifically, the second negative pressure device may be a vacuum pump, or a device capable of creating a vacuum, such as a vacuum generator.

[0148] The vacuum pump is connected to the first test cavity or the second test cavity through a pipeline. The first test cavity or the second test cavity has an air hole. The first test cavity or the second test cavity is evacuated to form a gas negative pressure area on the surface of the first test cavity or the second test cavity. The sample to be tested is placed on the surface of the first test cavity or the second test cavity and adsorbed by the negative pressure. The test is adhered to the surface of the first test cavity or the second test cavity.

[0149] Embodiment 8

[0150] In this embodiment, based on Example 3 or Example 4, at least one workstation is provided in the environmental chamber, and each workstation is provided with an automatic sample clamping structure.

[0151] In the automatic sample clamping structure of this embodiment, the first test cavity and the second test cavity are respectively arranged on the left and right sides of the sample:

[0152] In this embodiment, the first driving device and the second driving device are respectively used to drive the first test cavity and the second test cavity to move relative to each other in the horizontal direction and move corresponding preset distances respectively, so as to close the gap between the first test cavity and the second test cavity and compress the sample;

[0153] The first driving device and the second driving device are also used to drive the first test chamber and the second test chamber to move oppositely in the horizontal direction and move the third preset distance and the fourth preset distance respectively after the sample test is completed, so as to open the gap between the first test chamber and the second test chamber, and finally realize automatic compression of the sample and automatic entry and exit of the environmental chamber.

[0154] In a specific implementation, a sliding device is provided at the bottom end of the first test cavity, and the first driving device is used to drive the first test cavity to move in a horizontal direction along the sliding device.

[0155] A sliding device is provided at the bottom end of the second test cavity, and the second driving device is used to drive the second test cavity to move in a horizontal direction along the sliding device.

[0156] In a specific implementation, the first sliding device and the second sliding device can be implemented using existing structures, such as:

[0157] The first sliding device and the second sliding device include a guide structure and a sliding structure. The guide structure is arranged on a horizontal fixed plate, and the sliding structure is arranged at the bottom end of the first test cavity. The sliding structure is used to drive the first test cavity to move horizontally along the guide structure under the drive of the first driving device.

[0158] The guiding structure can be realized by a guide rail, and the sliding structure can be realized by a slider.

[0159] Among them, the structure in which the guide rail and the slider cooperate is small and light, and is easier to implement.

[0160] In addition, the guide structure can also be implemented by a lead screw, and the sliding structure can be implemented by a nut.

[0161] In an alternative embodiment, the first drive device is a belt-guided drive device.

[0162] The second drive is a belt-guided drive.

[0163] Specifically, the guided driving device can be implemented by driving a guided cylinder, wherein the guided cylinder has two telescopic rods, which is different from an ordinary cylinder having only one telescopic rod.

[0164] It should be noted that the guided driving mechanism can also be realized by using a guided electric cylinder drive.

[0165] In one or more embodiments, the sliding device includes a guide structure and a sliding structure, the guide structure is arranged on a horizontal fixed plate, the sliding structure is arranged at the bottom end of the second test cavity, and the sliding structure is used to drive the first test cavity to move horizontally along the guide structure under the drive of the first driving device.

[0166] The guiding structure can be realized by a guide rail, and the sliding structure can be realized by a slider.

[0167] Among them, the structure in which the guide rail and the slider cooperate is small and light, and is easier to implement.

[0168] In addition, the guide structure can also be implemented by a lead screw, and the sliding structure can be implemented by a nut.

[0169] Specifically, the guided driving device can be implemented by driving a guided cylinder, wherein the guided cylinder has two telescopic rods, which is different from an ordinary cylinder having only one telescopic rod.

[0170] It should be noted that the guided driving mechanism can also be realized by using a guided electric cylinder drive.

[0171] In a specific implementation, a sealing device is further provided between the first test cavity and the second test cavity.

[0172] The sealing device of this embodiment has the same structure as the sealing device of the fifth embodiment, and will not be described again here.

[0173] In a specific embodiment, the first test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the first test cavity to the surface of the first test cavity.

[0174] In an optional embodiment, the second test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the second test cavity to the surface of the second test cavity.

[0175] Specifically, the second negative pressure device may be a vacuum pump, or a device capable of creating a vacuum, such as a vacuum generator.

[0176] The vacuum pump is connected to the first test cavity or the second test cavity through a pipeline. The first test cavity or the second test cavity has an air hole. The first test cavity or the second test cavity is evacuated to form a gas negative pressure area on the surface of the first test cavity or the second test cavity. The sample to be tested is placed on the surface of the first test cavity or the second test cavity and adsorbed by the negative pressure. The test is adhered to the surface of the first test cavity or the second test cavity.

[0177] Embodiment 9

[0178] In this embodiment, based on Example 3 or Example 4, at least one workstation is provided in the environmental chamber, and each workstation is provided with an automatic sample clamping structure.

[0179] The automatic sample clamping structure of this embodiment includes:

[0180] A first test cavity and a second test cavity; a sample is arranged between the first test cavity and the second test cavity, and the first test cavity and the second test cavity are arranged above and below the sample, respectively; the first test cavity is fixed;

[0181] A driving device is connected to the second test chamber; the driving device is used to drive the second test chamber to move upward in the vertical direction by a preset distance to close the gap between the first test chamber and the second test chamber and to compress the sample; when the sample test is completed, the second test chamber is driven to move downward in the vertical direction by a fifth preset distance to open the gap between the first test chamber and the second test chamber, thereby finally realizing automatic compression of the sample and automatic entry and exit of the sample from the environmental chamber.

[0182] The fifth preset distance is a distance that can be preset manually, and the distance value can close the test cavity formed by the first test cavity and the second test cavity and simultaneously achieve the purpose of compacting the sample.

[0183] In other embodiments, the first test chamber and the second test chamber are arranged opposite to each other in the upper and lower directions, and the second test chamber is fixed; the driving device is used to drive the first test chamber to move downward in the vertical direction by a first preset distance to close the gap between the first test chamber and the second test chamber and to compress the sample; when the sample test is completed, the first test chamber is driven to move upward in the vertical direction by a second preset distance to open the gap between the first test chamber and the second test chamber, thereby finally realizing automatic compression of the sample and automatic entry and exit of the environmental chamber.

[0184] In an optional embodiment, the first test chamber and the second test chamber can also be arranged on the left and right sides of the sample, respectively. One of the first test chamber and the second test chamber is fixed and is a fixed chamber, and the other is a moving chamber; a driving device is used to drive the moving chamber to move a fifth preset distance toward the fixed chamber to close the first test chamber and the second test chamber and press the sample; when the sample test is completed, the moving chamber is driven away from the fixed chamber by a fifth preset distance to separate the first test chamber and the second test chamber, and finally realize the automatic pressing of the sample and the automatic entry and exit of the environmental chamber.

[0185] In a specific implementation, the driving device can be implemented by a cylinder.

[0186] It should be noted that the driving device is implemented by using any other existing driving structure forms, such as: a motor, an electric cylinder or a hydraulic cylinder.

[0187] In a specific implementation, a sealing device is further provided between the first test cavity and the second test cavity.

[0188] The sealing device of this embodiment has the same structure as the sealing device of the fifth embodiment, and will not be described again here.

[0189] In a specific embodiment, the first test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the first test cavity to the surface of the first test cavity.

[0190] In an optional embodiment, the second test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the second test cavity to the surface of the second test cavity.

[0191] Specifically, the second negative pressure device may be a vacuum pump, or a device capable of creating a vacuum, such as a vacuum generator.

[0192] The vacuum pump is connected to the first test cavity or the second test cavity through a pipeline. The first test cavity or the second test cavity has an air hole. The first test cavity or the second test cavity is evacuated to form a gas negative pressure area on the surface of the first test cavity or the second test cavity. The sample to be tested is placed on the surface of the first test cavity or the second test cavity and adsorbed by the negative pressure. The test is adhered to the surface of the first test cavity or the second test cavity.

[0193] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. A gas permeation testing system, characterized in that: include: Sealable environmental chamber; A temperature control and flow guiding device is provided in the environmental chamber; and A gas pressure control device is provided in the environmental chamber; The temperature control and flow guiding device comprises: a flow guiding bin, which is a hollow structure with openings at both ends; the flow guiding bin is symmetrically arranged inside a sealable environmental bin; a heating element and a cooling element are arranged on the flow guiding bin; the flow guiding bin is also connected with a first airflow generating device and a second airflow generating device, the first airflow generating device and the second airflow generating device are symmetrically arranged on the flow guiding bin, and the first airflow generating device and the second airflow generating device are used to suck out the first airflow and the second airflow of the flow guiding bin correspondingly and blow them to the environmental bin, so that the first airflow and the second airflow circulate between the flow guiding bin and the environmental bin; the flow guiding bin comprises a horizontal bin, a first vertical bin and a second vertical bin; one end of the first vertical bin is connected to the horizontal bin, and the other end is an open structure and a first air inlet; one end of the second vertical bin is connected to the horizontal bin, and the other end is an open structure and a second air inlet; wherein the horizontal bin is arranged on the inner side of the top wall of the environmental bin, and the first vertical bin and the second vertical bin are respectively arranged on the inner sides of two walls connected to the top wall; The horizontal bin is arranged on the center line of the inner side of the top wall of the environmental bin, and the first vertical bin and the second vertical bin are arranged on the center lines of the inner sides of two walls connected to the top wall respectively; The gas pressure control device comprises: an intake pipeline, the intake pipeline is connected to the gas source, and an intake valve is arranged on the intake pipeline; an exhaust pipeline, the exhaust pipeline is connected to the first negative pressure device, and an exhaust valve is arranged on the exhaust pipeline; the exhaust pipeline and the intake pipeline are connected and merged through a three-way valve to form a main pipeline, and the main pipeline is connected to the test chamber; a pressure sensor is arranged on the main pipeline; the intake valve, the exhaust valve and the pressure sensor are all connected to the second microprocessor; the pressure sensor is used to detect the pressure value in the test chamber in real time and transmit it to the second microprocessor; the second microprocessor is used to compare the received pressure value with the given pressure value to control the on and off of the intake valve and the exhaust valve, and the intake valve and the exhaust valve are both one-way valves; If the pressure value received by the second microprocessor is less than the given pressure value, the second microprocessor controls the air inlet valve to open, so that the gas in the air source enters the test chamber until the pressure value in the test chamber reaches the given pressure value and the air inlet valve is controlled to close; if the pressure value received by the second microprocessor is greater than the given pressure value, the second microprocessor controls the exhaust valve to open and the vacuum generator to exhaust air until the pressure value in the test chamber reaches the given pressure value and the exhaust valve is controlled to close.

2. The gas permeation testing system according to claim 1, characterized in that: The cooling element and the heating element are both connected to a first microprocessor, and the first microprocessor is connected to a temperature sensor, and the temperature sensor is used to detect the temperature in the environmental chamber and transmit it to the first microprocessor, and then the first microprocessor controls the working state of the cooling element and the heating element; Or the cooling element and the heating element are symmetrically arranged on the flow guide bin; Or the guide chamber is further provided with a first heat sink, and the first heat sink is connected to the refrigeration element; Or the refrigeration element is further connected to a second heat sink, and the second heat sink is arranged outside the environmental chamber; or the first airflow generating device and the second airflow generating device are both fans; The heating element is an electric heating block; Or the refrigeration element is a semiconductor refrigeration block or a refrigeration tube.

3. A gas permeation testing system as claimed in claim 1, characterized in that: At least one workstation is arranged in the environmental chamber, and each workstation is provided with an automatic sample clamping structure.

4. A gas permeation testing system as claimed in claim 3, characterized in that: The automatic sample clamping structure includes: a first test cavity and a second test cavity on both sides of the sample; a first driving device, which is connected to the first test cavity; a second driving device, which is connected to the second test cavity; the first driving device and the second driving device are respectively used to drive the first test cavity and the second test cavity to move relative to each other, so that the first test cavity and the second test cavity are closed or separated, thereby realizing automatic compression of the sample and automatic entry and exit of the environmental chamber.

5. A gas permeation testing system as claimed in claim 3, characterized in that: The automatic sample clamping structure includes: a first test cavity and a second test cavity on both sides of the sample; either one of the first test cavity and the second test cavity is fixed as a fixed cavity, and the other is a movable cavity; a driving device, which is used to control the driving device to drive the movable cavity and the fixed cavity to close or separate, so as to realize automatic compression of the sample and automatic entry and exit of the environmental chamber.

6. The gas permeation testing system according to claim 4 or 5, characterized in that: A sealing device is also provided between the first test cavity and the second test cavity.

7. The gas permeation testing system according to claim 4 or 5, characterized in that: The first test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the first test cavity to the surface of the first test cavity.

8. The gas permeation testing system according to claim 4 or 5, characterized in that: The second test cavity is connected to a second negative pressure device, and the second negative pressure device is used to adsorb and adhere the sample placed on the second test cavity to the surface of the second test cavity.

9. The gas permeation testing system according to claim 4, characterized in that: When the first test chamber and the second test chamber are respectively arranged above and below the specimen: Before clamping the sample, the first driving device is used to drive the first test cavity to move upward, and the second driving device is used to move the second test cavity in the horizontal direction, so that the first test cavity and the second test cavity are separated and the second test cavity extends out of the environmental chamber; When the sample is placed in the second test chamber, the second driving device is used to drive the second test chamber to retract into the environmental chamber, and the first driving device is used to drive the first test chamber to move vertically downward, so that the first test chamber and the second test chamber are closed to compress the sample.

10. The gas permeation testing system according to claim 4, characterized in that: When the first test chamber and the second test chamber are respectively arranged above and below the specimen: Before clamping the sample, the second driving device is used to drive the second test cavity to move downward, and the first driving device is used to drive the first test cavity to move in the horizontal direction, so that the first test cavity and the second test cavity are separated and the first test cavity extends out of the environmental chamber; When the sample is adsorbed to the first test cavity, the first driving device is used to drive the first test cavity to retract into the environmental chamber, and the second driving device is used to drive the second test cavity to move vertically upward, so that the first test cavity and the second test cavity are closed to compress the sample.

11. The gas permeation testing system according to claim 4, characterized in that: When the first test cavity and the second test cavity are respectively arranged on the left and right sides of the specimen: The first driving device and the second driving device are respectively used to drive the first test cavity and the second test cavity to move relative to each other in the horizontal direction, so as to close the first test cavity and the second test cavity and compress the sample; The first driving device and the second driving device are also used to respectively drive the first test cavity and the second test cavity to move in opposite directions in a horizontal direction after the sample test is completed, so that the first test cavity and the second test cavity are separated.

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