A gas block testing device for packed columns

Abstract

The utility model relates to the technical field of filling column detection device, specifically relates to a gas resistance testing arrangement for filling column. The utility model provides a gas resistance testing arrangement for filling column, the gas resistance testing arrangement includes gas resistance test subassembly, hand -held fixer and connecting pipeline, the gas resistance test subassembly includes the gas flowmeter and air pressure sensor of intercommunication, the hand -held fixer includes clamp unit, the clamp unit is used for fixed and closed intercommunication the filling column of measuring, one end of clamp unit passes through connecting pipeline and is communicated with air pressure sensor, the clamp unit includes clamp pipe nozzle, and its outer diameter is less than the inner diameter of the filling column of measuring, the clamp unit is communicated with the filling column of measuring through clamp pipe nozzle, and the utility model can carry out the test to the permeability of filling column.

Description

Technical Field

[0001] This utility model relates to the technical field of filling column testing devices, specifically to a gas resistance testing device for filling columns. Background Technology

[0002] In the chemical industry, biomedicine, environmental monitoring, and other fields, packed columns, as highly efficient and multifunctional devices, have long been widely used for the separation, purification, catalysis, and synthesis of substances. Their core principle involves filling a column-shaped container with a solid-phase material (such as an adsorbent, catalyst, or stationary phase) with specific functions, utilizing the interaction between the mobile phase (liquid or gas) and the stationary phase (such as partitioning, adsorption, ion exchange, or chemical reaction) to process the target substance. Packed columns include synthesis columns, chromatographic columns, adsorption columns, catalytic columns, and extraction columns.

[0003] High-throughput synthesis columns are experimental tools used in chemical synthesis, biosynthesis, or solid-phase synthesis (such as peptides and oligonucleotides) to perform multiple reactions simultaneously or rapidly and continuously. They are typically used in conjunction with automated systems (such as synthesizers and liquid chromatography workstations) to significantly improve synthesis efficiency and are suitable for fields such as drug discovery, combinatorial chemistry, and genomics. Currently, in parallel synthesis, the permeability of different synthesis columns may vary, leading to inconsistent product yields or purities. If the permeability of synthesis columns could be tested, and process conditions adjusted accordingly, these problems could be effectively avoided. Utility Model Content

[0004] To address the aforementioned issues, this application provides a gas resistance testing device for detecting the permeability of a packed column. The device includes a gas resistance testing component, a handheld fixture, and a connecting pipe. The gas resistance testing component includes a gas flow meter and a pressure sensor. One end of the gas flow meter is connected to a gas source, and the other end is connected to the pressure sensor. The handheld fixture includes a clamp unit for fixing and sealing the packed column under test. One end of the clamp unit is connected to the pressure sensor via the connecting pipe. The clamp unit includes a clamp nozzle, the outer diameter of which is smaller than the inner diameter of the packed column under test. The clamp unit is connected to the packed column under test through the clamp nozzle.

[0005] In some embodiments of this utility model, the gas flow meter is provided with an air inlet, and the gas flow meter can be connected to a gas source through the air inlet. The air pressure sensor is provided with an air outlet, and the air pressure sensor is connected to the clamp unit of the handheld fixture through the air outlet.

[0006] In some embodiments of this utility model, the handheld fixture further includes a gripping unit, and the clamping unit is connected to the gripping unit.

[0007] In some embodiments of this utility model, the clamping unit further includes a first clamp and a second clamp.

[0008] In some embodiments of this utility model, the gripping unit includes a first clamp arm and a second clamp arm that are hinged to each other.

[0009] In some embodiments of this utility model, the first clamp is located at one end of the first clamp arm, and the second clamp is located at the same end of the second clamp arm.

[0010] In some embodiments of this utility model, the first clamp arm and the second clamp arm are hinged together by a pivot.

[0011] In some embodiments of this utility model, the first clamp has a passage, the clamp nozzle is located on the surface of the first clamp near the second clamp side and at one end of the passage, and the other end of the passage is connected to the air pressure sensor through a connecting pipe.

[0012] The second clamp has a receiving portion that extends from the side of the second clamp near the first clamp to the side far from the first clamp. The receiving portion can fix the filling column to be tested. When the first clamp and the second clamp are close together and the receiving portion is fixing the filling column, the clamp nozzle can enter the filling column.

[0013] In some embodiments of this utility model, the clamp unit further includes a seal, which is located on the surface of the first clamp on the outer periphery of the clamp nozzle.

[0014] In some embodiments of this utility model, the clamp unit further includes a threaded connection port, which is located near the end of the connecting pipe within the passage of the first clamp, and the threaded connection port is threadedly connected to the connecting pipe.

[0015] In some embodiments of this utility model, the gas resistance testing component further includes a touch screen and a PLC controller. The touch screen is electrically connected to the PLC controller, and the PLC controller is electrically connected to the gas flow meter and the gas pressure sensor, respectively.

[0016] In some embodiments of this utility model, the air resistance testing component further includes a printer, which is electrically connected to the touch screen.

[0017] In some embodiments of this utility model, the gas resistance testing component further includes a power supply module, which is electrically connected to the touch screen, PLC controller, printer, gas flow meter, and air pressure sensor respectively.

[0018] In some embodiments of this utility model, the air resistance testing component further includes a switch, which is electrically connected to the power module.

[0019] In some embodiments of this utility model, the air resistance testing component further includes a housing.

[0020] In some embodiments of this utility model, the gas flow meter, gas pressure sensor, PLC controller, and power module are all located inside the housing.

[0021] In some embodiments of this utility model, the touch screen, printer, and switch are all embedded in the outer wall of the housing;

[0022] In some embodiments of this utility model, the air inlet and air outlet are located on the outer side wall of the housing.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention provides a gas resistance testing device for packed columns, which can test the permeability of packed columns. Its structure is simple and the detection is accurate. Therefore, when selecting and using packed columns, the process conditions can be changed according to the different permeability of the packed columns, so as to avoid the problem of inconsistent product yield or purity due to the possible differences in permeability of different packed columns. It can also quickly test the gas resistance value of packed columns at the same flow rate, so as to screen packed columns with the same permeability for subsequent synthesis experiments. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the air resistance testing device of this utility model.

[0026] Figure 2 This is a perspective view of the appearance of the air resistance testing component of this utility model.

[0027] Figure 3 This is a top view of the appearance of the air resistance testing component of this utility model.

[0028] Figure 4 This is a left view of the appearance of the air resistance testing component of this utility model.

[0029] Figure 5 This is a right view of the appearance of the air resistance testing component of this utility model.

[0030] Figure 6 This is a front view of the internal structure of the air resistance testing component of this utility model.

[0031] Figure 7 This is a left view of the internal structure of the air resistance testing component of this utility model.

[0032] Figure 8This is a right view of the internal structure of the air resistance testing component of this utility model.

[0033] Figure 9 This is a schematic diagram of the handheld fixation device of this utility model.

[0034] Figure 10 This is a schematic diagram of the handheld fixation device of this utility model in use.

[0035] Figure Labels

[0036] 1-Gas resistance test assembly; 11-House; 12-Gas flow meter; 121-Inlet; 13-Pressure sensor; 131-Outlet; 14-PLC controller; 15-Power module; 16-Touch screen; 17-Printer; 18-Switch;

[0037] 2-Handheld retainer; 21-Clamping unit; 211-First clamp; 212-Second clamp; 213-Clamping nozzle; 214-Receiving part; 215-Threaded connection port; 216-Seal; 22-Grip unit; 221-First clamp arm; 222-Second clamp arm; 223-Spindle;

[0038] 3-Connecting pipes;

[0039] 4-Synthesis column. Detailed Implementation

[0040] In the description of this utility model, it should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] like Figures 1-9 As shown, this utility model embodiment provides an air resistance testing device for a filled column, see [link to relevant documentation]. Figure 1 The air resistance testing device includes an air resistance testing component 1, a handheld fixture 2, and a connecting pipe 3. The air resistance testing component 1 is used to connect to an external air source, control the gas flow rate entering the air resistance testing device, and detect the gas pressure entering the filling column. The handheld fixture 2 is used to fix the filling column to be tested and to connect it in a closed manner, allowing the gas in the air resistance testing component 1 to be introduced into the filling column. The air resistance testing component 1 is connected to the handheld fixture 2 through the connecting pipe 3.

[0043] The external gas source can use existing technology, as long as it can input gas into the gas resistance testing device, such as an existing nitrogen gas cylinder.

[0044] The packed column is a device that fills the interior of a hollow columnar or columnar (such as a segmented column, a conical column, or a spiral column) container with functional materials (such as adsorbents, catalysts, or stationary phases). It achieves separation, reaction, or purification functions through solid-liquid or solid-gas phase interactions and may include structures such as column tubes, packing materials, and sieve plates / filters.

[0045] In this embodiment, the filling column can be a porous matrix filling column or a non-porous matrix synthetic column.

[0046] More specifically, the packed column can be a synthesis column, chromatographic column, adsorption column, catalytic column, extraction column, etc.

[0047] The synthesis column can be, for example, a synthesis column for chemical synthesis, a synthesis column for biosynthesis, a synthesis column for solid-phase synthesis, or, for example, a nucleic acid synthesis column, a peptide synthesis column, or a small molecule compound synthesis column.

[0048] See Figure 6The gas resistance testing assembly 1 includes a gas flow meter 12 and a pressure sensor 13. One end of the gas flow meter 12 can be connected to an external gas source, and the other end can be connected to the pressure sensor 13, thereby forming a connected gas passage within the gas resistance testing assembly 1. In use, one end of the gas flow meter 12 is connected to the external gas source, and the gas provided by the external gas source can pass through the gas flow meter 12 and the pressure sensor 13 sequentially within the gas resistance testing assembly 1. The gas flow meter 12 can adopt existing technology, only needing to be able to adjust and control the gas flow rate, for example, the gas flow meter 12 can be an existing gas mass flow meter. The pressure sensor 13 can adopt existing technology, only needing to be able to detect the gas pressure entering the filling column.

[0049] Specifically, such as Figure 4 and Figure 7 As shown, the gas flow meter 12 is provided with an air inlet 121. The air inlet 121 of the gas flow meter 12 can be connected to an external gas source through an external pipe, so that the gas provided by the external gas source enters the gas flow meter 12 of the gas resistance test assembly 1 through the external pipe and the air inlet 121.

[0050] like Figure 5 and Figure 8 As shown, the pressure sensor 13 is provided with an air outlet 131. The pressure sensor 13 is connected to the connecting pipe 3 through the air outlet 131, so that the gas flowing through the pressure sensor 13 can enter the connecting pipe 3 and the filling column to be tested fixed by the subsequent handheld fixture 2 through the air outlet 131.

[0051] See Figure 2 and Figure 6 The gas resistance testing assembly 1 also includes a touch screen 16 and a PLC controller 14. The touch screen 16 is electrically connected to the PLC controller 14. The touch screen 16 not only has an input function, but can also display the real-time measured pressure value of the pressure sensor 13 and the pressure difference value calculated by the PLC controller 14. The PLC controller 14 is electrically connected to the gas flow meter 12. In use, the required flow value of the gas flow meter 12 can be input through the touch screen 16 and the flow value is transmitted to the PLC controller 14. The PLC controller 14 sends a control command to the gas flow meter 12 to adjust the flow of the gas flow meter 12 to the required flow value, thereby enabling the required and constant flow of gas from the upper inlet to the lower inlet of the filling column.

[0052] The PLC controller 14 is also electrically connected to the pressure sensor 13. During use, the pressure sensor 13 measures the gas pressure entering the filling column, which is the measured pressure value. The measured pressure value is transmitted to the PLC controller 14. After receiving the measured pressure value from the pressure sensor 13, the PLC controller 14 calculates the measured pressure value and calculates the difference between the measured pressure values ​​within 2 seconds. The measured pressure value and the difference are displayed on the touch screen 16 in real time. When the calculated difference between the measured pressure values ​​within 2 seconds is less than or equal to 0.02 kPa, it indicates that the measured pressure value is stable. The PLC controller 14 sends a control command to the touch screen 16, so that the touch screen 16 saves the measured pressure value.

[0053] See also Figure 2 The air resistance testing component 1 may also include a printer 17, which is electrically connected to the touch screen 16. The printer 17 can print out the measured pressure value stored on the touch screen 16. In use, when the PLC controller 14 calculates that the difference in the measured pressure value within 2 seconds is less than or equal to 0.02 kPa, it indicates that the measured pressure value is stable. The PLC controller 14 sends a control command to the touch screen 16, causing the touch screen 16 to transmit the print content including the measured pressure value to the printer 17 for printing.

[0054] See also Figures 6-8 The gas resistance testing assembly 1 also includes a power module 15, which is electrically connected to the touch screen 16, PLC controller 14, printer 17, gas flow meter 12, and pressure sensor 13, respectively, thereby providing DC power to each component.

[0055] See also Figures 3-5 The air resistance testing component 1 may also include a switch 18, which is electrically connected to the power module 15. The operator controls the start and stop of the air resistance testing device through the switch 18.

[0056] The aforementioned touch screen 16, PLC controller 14, printer 17, power module 15, and switch 18 may all include electrical connection interfaces.

[0057] The touch screen 16, PLC controller 14, printer 17, power module 15, and switch 18 mentioned above can all adopt existing technologies well known in the art, and only need to implement the above functions. For example, the PLC controller 14 can be a Siemens 1215CAC / DC / Rly.

[0058] Furthermore, the gas resistance testing assembly 1 may also include a housing 11, in which the gas flow meter 12, the pressure sensor 13, the PLC controller 14, and the power module 15 are all located; the touch screen 16, the printer 17, and the switch 18 are all embedded on the outer wall of the housing 11; and the air inlet 121 and the air outlet 131 are located on the outer side wall of the housing 11.

[0059] The bottom of the housing 11 may also include several support feet, for example, at least three or more support feet.

[0060] like Figure 9 As shown, the handheld fixture 2 includes a clamp unit 21 and a gripping unit 22. The clamp unit 21 is used to fix and seal the filling column to be tested. The sealed connection ensures the internal connectivity between the clamp unit 21 and the filling column to be tested, and prevents external interference or leakage from affecting the connection. This avoids air leakage during the test from affecting the results. The pressure sensor 13 is connected to one end of the clamp unit 21 through the connecting pipe 3. After the gas flows through the pressure sensor 13, it enters the connecting pipe 3 and then enters the clamp unit 21 from one end.

[0061] The clamp unit 21 includes a clamp nozzle 213, which is connected to the filling column to be tested. The outer diameter of the clamp nozzle 213 is smaller than the inner diameter of the filling column to be tested. The clamp nozzle 213 can be close to or fit against the inner wall of the filling column. That is, when using the gas resistance testing device, by inserting the clamp nozzle 213 into the filling column to be tested, gas can be delivered into the filling column to be tested, and the gas flows from the upper opening to the lower opening of the filling column.

[0062] More specifically, such as Figure 9As shown, the clamp unit 21 may further include a first clamp 211 and a second clamp 212. The first clamp 211 has a passage. The clamp nozzle 213 is located on the surface of the first clamp 211 near the second clamp side and at one end of the passage. The other end of the passage is connected to the pressure sensor 13 via a connecting pipe 3. When the first clamp 211 and the second clamp 212 are close together and the receiving portion 214 is fixed with a filling column, the clamp nozzle 213 can enter the filling column, allowing gas flowing from the pressure sensor 13 to pass through. Gas enters the passage of the first clamp 211 through the connecting pipe 3, and enters the filling column to be tested through the clamp nozzle 213 at one end of the passage. The surface of the first clamp 211 near the second clamp side can fit against the upper end face of the filling column to be tested, and the gas is delivered into the filling column to be tested through the clamp nozzle 213, realizing a closed connection between the clamp unit 21 and the filling column to be tested. This ensures the internal connectivity of the connection between the first clamp 211 and the filling column to be tested, and prevents the connection from being affected by external interference or leakage, thus avoiding gas leakage problems that may affect the results during the test.

[0063] The second clamp 212 has a receiving portion 214 that extends from the side of the second clamp 212 near the first clamp to the side far from the first clamp. The receiving portion 214 can fix the filling column to be tested. The fixing only needs to prevent the filling column from automatically shifting. For example, the fixing can be achieved by the following method: the top of the filling column to be tested has a shoulder, and the lower end face of the shoulder abuts against the surface of the second clamp 212 near the first clamp, thereby fixing the filling column.

[0064] The gripping unit 22 includes a first clamping arm 221 and a second clamping arm 222 that are hinged to each other. For example, the first clamping arm 221 and the second clamping arm 222 are hinged through a pivot 223.

[0065] The first clamp 211 is located at one end of the first clamp arm 221, and the second clamp 212 is located at the same end of the second clamp arm 222. The first clamp arm 221 and the second clamp arm 222 open and close around the rotating shaft 223, thereby driving the first clamp 211 at the end of the first clamp arm 221 and the second clamp 212 at the end of the second clamp arm 222 to open and close. When in the closed state, the clamp nozzle 213 on the first clamp 211 is inserted into the filling column to be tested fixed by the second clamp 212.

[0066] Furthermore, the clamp unit 21 also includes a sealing element 216. The sealing element 216 is located on the surface of the first clamp 211 on the outer periphery of the clamp nozzle 213. The sealing element 216 can fit against the upper end face of the filling column to be tested, providing a further sealing effect. This further ensures that the first clamp 211 and the clamp nozzle 213 can be in closed communication with the filling column to be tested, preventing air leakage and ensuring the accuracy of the test. The sealing element 216 can be, for example, an O-ring.

[0067] Furthermore, the clamp unit 21 also includes a threaded connection port 215, which is located near the end of the connecting pipe in the passage of the first clamp 211. The connecting pipe 3 can be threadedly connected to the threaded connection port 215 in the passage of the first clamp 211 to ensure that the connecting pipe 3 can be securely and sealedly connected to the first clamp 211.

[0068] The complete gas passage of this utility model is as follows: gas is supplied by an external gas source, passes through an external pipeline, enters the gas flow meter 12 through the inlet 121, passes through the gas flow meter 12 and the pressure sensor 13 connected to the gas flow meter 12, enters the connecting pipe 3 through the outlet 131 of the pressure sensor 13, passes through the connecting pipe 3, enters the passage in the first clamp 211 through the threaded connection port 215, passes through the first clamp 211 and the clamp nozzle 213 on the first clamp 211, and finally enters the filling column to be tested, and flows from the upper opening to the lower opening of the filling column, and can only flow out from the lower opening of the filling column to the external environment. All connecting parts in the gas passage can be seamlessly closed, which not only ensures the internal connectivity of the connecting parts, but also prevents the connecting parts from being interfered with or leaked by the outside, thus avoiding gas leakage.

[0069] Taking the synthesis column as an example, when using this utility model, 1) firstly, the inlet 121 of the gas flow meter 12 is connected to an external gas source, one end of the connecting pipe 3 is connected to the outlet 131 of the pressure sensor, and the other end is connected to the threaded connection port 215 at the upper end of the first clamp 211, and the switch 18 is turned on.

[0070] 2) Then install the synthetic column 4 to be tested in the receiving part 214 of the second clamp 212, grip the first clamp arm 221 and the second clamp arm 222, rotate the shaft 223 to drive the first clamp 211 and the second clamp 212 to move closer, the hand-held fixture 2 is in the closed state, the clamp nozzle 213 is inserted into the synthetic column 4 to be tested, and the surface of the first clamp 211 or the sealing element 216 and the upper end face of the synthetic column 4 to be tested are tightly fitted and sealed.

[0071] 3) Then, set the required gas flow rate (e.g., 0-1 L / min) and print content (e.g., time, set flow rate, batch number, work number, gas resistance value, where the gas resistance value is the measured pressure value) on the touch screen 16. The touch screen 16 transmits the gas flow signal to the PLC controller 14. The PLC controller 14 sends control instructions to the gas flow meter 12, so that the flow rate of the gas flow meter 12 is adjusted to the required flow rate value. The external gas source provides gas, which flows through the gas flow meter 12, the pressure sensor 13, the connecting pipe 3, the first clamp 211, the clamp nozzle 213, and finally flows into the synthesis column 4 to be measured. It flows from the top of the synthesis column 4 to the bottom of the synthesis column 4. The pressure sensor 13 detects the gas pressure entering the synthesis column 4 and feeds back the measured pressure value to the PLC controller 14.

[0072] 4) The PLC controller 14 receives the measured pressure value from the air pressure sensor 13 and performs calculations to calculate the difference in measured pressure value within 2 seconds. The touch screen 16 displays the measured pressure value detected by the air pressure sensor 13 and the pressure difference calculated by the PLC controller 14 in real time. When the difference in measured pressure value within 2 seconds is less than or equal to 0.02 kPa, it indicates that the measured pressure value is stable. The PLC controller 14 sends a control command to the touch screen 16 to save the measured pressure value.

[0073] 5) At the same time, the PLC controller 14 transmits the control command of the print execution signal to the touch screen 16, and the touch screen 16 then transmits the print content to the printer 17. The printer 17 receives the print content and executes the printing.

[0074] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A gas resistance testing device for a packed column, characterized in that, The air resistance testing device includes an air resistance testing component (1), a handheld fixture (2), and a connecting pipe (3); the air resistance testing component (1) includes a gas flow meter (12) and a pressure sensor (13), one end of the gas flow meter (12) can be connected to a gas source, and the other end is connected to the pressure sensor (13); the handheld fixture (2) includes a clamp unit (21), the clamp unit (21) is used to fix and close the connection to the filling column to be tested, one end of the clamp unit (21) is connected to the pressure sensor (13) through the connecting pipe (3), the clamp unit (21) includes a clamp nozzle (213), the outer diameter of the clamp nozzle (213) is smaller than the inner diameter of the filling column to be tested, and the clamp unit (21) is connected to the filling column to be tested through the clamp nozzle (213).

2. The air resistance testing device according to claim 1, characterized in that, The handheld fixture (2) also includes a gripping unit (22), and the clamping unit (21) is connected to the gripping unit (22); And / or, the gas flow meter (12) is provided with an air inlet (121), the gas flow meter (12) can be connected to a gas source through the air inlet (121), the pressure sensor (13) is provided with an air outlet (131), the pressure sensor (13) is connected to the connecting pipe (3) through the air outlet (131).

3. The air resistance testing device according to claim 2, characterized in that, The clamp unit (21) further includes a first clamp (211) and a second clamp (212). The first clamp (211) has a passage. The clamp nozzle (213) is located on the surface of the first clamp (211) near the second clamp side and at one end of the passage. The other end of the passage is connected to the air pressure sensor (13) through a connecting pipe (3). The second clamp (212) has a receiving part (214). The receiving part (214) extends from the side of the second clamp (212) near the first clamp side to the side far from the first clamp side. The receiving part (214) can fix the filling column to be tested. When the first clamp (211) and the second clamp (212) are close together and the receiving part (214) is fixed with the filling column, the clamp nozzle (213) can enter the filling column.

4. The air resistance testing device according to claim 3, characterized in that, The clamp unit (21) further includes a seal (216) located on the surface of the first clamp (211) on the outer periphery of the clamp nozzle (213); And / or, the gripping unit (22) includes a first clamping arm (221) and a second clamping arm (222) hinged to each other, the first clamp (211) being located at one end of the first clamping arm (221) and the second clamp (212) being located at the same end of the second clamping arm (222).

5. The air resistance testing device according to claim 4, characterized in that, The clamp unit (21) further includes a threaded connection port (215), which is located near the end of the connecting pipe in the passage of the first clamp (211), and is threadedly connected to the connecting pipe (3). And / or, the first clamp arm (221) and the second clamp arm (222) are hinged by a pivot (223).

6. The air resistance testing device according to any one of claims 1 to 5, characterized in that, The gas resistance test assembly (1) also includes a touch screen (16) and a PLC controller (14). The touch screen (16) is electrically connected to the PLC controller (14), and the PLC controller (14) is electrically connected to the gas flow meter (12) and the air pressure sensor (13) respectively.

7. The air resistance testing device according to claim 6, characterized in that, The air resistance test assembly (1) also includes a printer (17) which is electrically connected to the touch screen (16).

8. The air resistance testing device according to claim 7, characterized in that, The gas resistance test assembly (1) also includes a power module (15), which is electrically connected to the touch screen (16), PLC controller (14), printer (17), gas flow meter (12), and pressure sensor (13).

9. The air resistance testing device according to claim 8, characterized in that, The air resistance test assembly (1) also includes a switch (18), which is electrically connected to the power module (15).

10. The air resistance testing device according to claim 9, characterized in that, The gas resistance test assembly (1) also includes a housing (11), and the gas flow meter (12), gas pressure sensor (13), PLC controller (14), and power module (15) are all located inside the housing (11); And / or, the touch screen (16), printer (17), and switch (18) are all embedded in the outer wall of the housing (11); And / or, the gas flow meter (12) is provided with an air inlet (121), the gas flow meter (12) can be connected to a gas source through the air inlet (121), the pressure sensor (13) is provided with an air outlet (131), the pressure sensor (13) is connected to the connecting pipe (3) through the air outlet (131); the air inlet (121) and the air outlet (131) are located on the outer wall of the housing (11).

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