Medium recovery monitoring device

Abstract

The invention relates to test equipment with medium leakage, and provides a medium recovery monitoring device, which is characterized in that a medium recovery pipe is arranged, the equipment collection end of the medium recovery pipe is communicated with a recovery groove of fatigue test equipment to uniformly collect a medium leaked from a guide pipe in a fatigue test, and then a medium temporary storage pipe is arranged; the medium temporary storage pipe is communicated with the temporary storage pipe connecting end of the medium recovery pipe and used for temporarily storing media collected by the medium recovery pipe in a unified mode, and a liquid level sensor is arranged and assembled in the medium temporary storage pipe and used for monitoring the liquid level height of the temporarily-stored media in the medium temporary storage pipe so as to generate a liquid level height signal to be transmitted to an upper computer to be processed. Therefore, automatic recovery and monitoring of the leaked medium are realized. Even if the medium leaks slowly, the pressure fluctuation of the medium is extremely small, and the leakage of the medium cannot be judged through the pressure fluctuation acquired by the pressure sensor, the leakage can still be effectively monitored, and the harm caused by long-time leakage without monitoring of the medium is avoided.

Description

Technical Field

[0001] The present invention relates to the field of aviation conduit rotation bending fatigue testing, or other testing equipment with medium leakage, and more specifically, to a medium recovery monitoring device. Background Art

[0002] Bending fatigue failure is a form of failure of aviation ducts. In order to improve the reliability of the design of aviation duct components, the fatigue life of aviation duct components under certain stress states is measured using a rotary bending fatigue tester, which is an important technical means to study the fatigue fracture of aviation duct components. The fatigue test process of the duct is generally unattended. After the duct fatigue fractures, the liquid medium that has been flowing inside the duct will leak. In order to detect medium leakage, in the existing technology, the medium leakage is mainly judged by the pressure fluctuation collected by the pressure sensor. However, when the medium leaks slowly, the medium pressure fluctuation is extremely small, and the medium leakage cannot be judged by the pressure fluctuation collected by the pressure sensor. The medium leakage is difficult to be detected, and long-term leakage will eventually bring certain harm.

[0003] In summary, the existing catheter fatigue testing technology has technical problems such as slow leakage of the medium cannot be discovered in time and long-term leakage will cause harm. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art to at least a certain extent, and to provide a medium recovery monitoring device to monitor medium leakage and avoid the harm caused by long-term medium leakage.

[0005] The medium recovery monitoring device provided by the present invention comprises:

[0006] A medium recovery pipe, wherein the equipment collection end of the medium recovery pipe is connected to the recovery groove of the fatigue test equipment to uniformly collect the medium leaked from the catheter during the fatigue test;

[0007] A medium temporary storage pipe, connected to the temporary storage pipe connection end of the medium recovery pipe, temporarily storing the medium collected uniformly by the medium recovery pipe;

[0008] The liquid level sensor is installed inside the medium temporary storage tube and is used to monitor the liquid level height of the temporary storage medium inside the medium temporary storage tube to generate a liquid level height signal and transmit it to the host computer for processing.

[0009] Furthermore, when the host computer processes the liquid level height signal, the liquid level height of the temporary storage medium inside the temporary medium storage tube is determined by the liquid level height signal.

[0010] Furthermore, when the liquid level of the temporary storage medium inside the temporary storage pipe reaches a preset liquid level threshold, the host computer controls the alarm device to issue a liquid level alarm.

[0011] Furthermore, when the liquid level of the temporary storage medium inside the temporary storage pipe reaches a preset liquid level threshold, the host computer controls the medium supply system to stop supplying the medium to the fatigue test conduit.

[0012] Furthermore, when the liquid level of the temporary storage medium inside the temporary storage pipe reaches a preset liquid level threshold, the host computer controls the fatigue testing device to stop the testing operation.

[0013] Furthermore, the medium temporary storage tube is a transparent medium temporary storage tube.

[0014] Furthermore, the transparent medium temporary storage tube is a glass tube.

[0015] Furthermore, the medium recovery monitoring device also includes a lower end cover; the lower end cover is connected to the bottom end of the medium temporary storage tube, and the bottom end of the medium temporary storage tube is connected to the temporary storage tube connecting end of the medium recovery tube, so that the medium temporary storage tube is connected to the recovery groove of the fatigue testing equipment through the medium recovery tube.

[0016] Furthermore, the medium recovery monitoring device also includes a mounting bracket; the mounting bracket is connected to the lower end cover, and supports the lower end cover, the medium temporary storage pipe and the medium recovery pipe.

[0017] Furthermore, the medium recovery monitoring device also includes an upper end cover; the upper end cover is arranged at the top end of the medium temporary storage tube to seal the top end of the medium temporary storage tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The medium recovery monitoring device provided by the present invention is provided with a medium recovery pipe, the equipment collection end of which is connected with the recovery groove of the fatigue test equipment, so as to uniformly collect the medium leaked from the catheter during the fatigue test, and then a medium temporary storage pipe is provided, which is connected with the temporary storage pipe connection end of the medium recovery pipe, so as to temporarily store the medium uniformly collected by the medium recovery pipe, and then a liquid level sensor is provided, which is assembled inside the medium temporary storage pipe and is used to monitor the liquid level height of the temporarily stored medium inside the medium temporary storage pipe, so as to generate a liquid level height signal and transmit it to the host computer for processing, thereby realizing the automatic recovery of the leaked medium, and automatically measuring the medium recovery capacity to judge the leakage degree, which is used as a basis to control the next action, such as alarm prompt, automatic stop of medium supply, automatic shutdown, etc. Even if the medium leaks slowly, the medium pressure fluctuation is extremely small, and the medium leakage cannot be judged by the pressure fluctuation collected by the pressure sensor, in this case, effective leakage monitoring can still be obtained, avoiding the harm caused by the medium leakage without monitoring for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic diagram of an assembly structure of a medium recovery monitoring device according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the structure of the medium recovery monitoring device according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1. Install the bracket;

[0025] 2. Lower end cover;

[0026] 3. Sealing ring;

[0027] 4. Temporary storage tube for medium;

[0028] 5. Liquid level sensor;

[0029] 6. Upper end cover;

[0030] 7. Medium discharge pipe;

[0031] 8. Valve;

[0032] 9. Medium overflow pipe;

[0033] 1 0. Series bolts;

[0034] 11. Medium recovery pipe. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar methods or methods having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 2 , the medium recovery monitoring device provided by the embodiment of the present invention includes:

[0037] A medium recovery pipe 11, wherein the equipment collection end of the medium recovery pipe 11 is connected to the recovery groove of the fatigue test equipment to uniformly collect the medium leaked from the catheter during the fatigue test;

[0038] The medium temporary storage pipe 4 is connected to the temporary storage pipe connection end of the medium recovery pipe 11, and temporarily stores the medium uniformly collected by the medium recovery pipe 11;

[0039] The liquid level sensor 5 is installed inside the medium temporary storage tube 4 and is used to monitor the liquid level of the temporary storage medium inside the medium temporary storage tube 4 to generate a liquid level signal and transmit it to the host computer for processing.

[0040] It should be noted that, in this embodiment, by setting a medium recovery pipe 11, the device collection end of the medium recovery pipe 11 is connected to the recovery groove of the fatigue test equipment, and the medium leaked from the catheter during the fatigue test is uniformly collected, and then a medium temporary storage pipe 4 is set, and the medium temporary storage pipe 4 is connected to the temporary storage pipe connection end of the medium recovery pipe 11, and the medium uniformly collected by the medium recovery pipe 11 is temporarily stored, and then a liquid level sensor 5 is set, and the liquid level sensor 5 is assembled inside the medium temporary storage pipe 4, and is used to monitor the liquid level height of the temporary storage medium inside the medium temporary storage pipe 4, so as to generate a liquid level height signal and transmit it to the host computer for processing, thereby realizing the automatic recovery of the leaked medium, and automatically measuring the medium recovery capacity to judge the leakage degree, and using this as a basis to control the next action, such as alarm prompt, automatic stop of medium supply, automatic shutdown, etc. Even if the medium leaks slowly, the medium pressure fluctuation is very small, and the medium leakage cannot be judged by the pressure fluctuation collected by the pressure sensor, in this case, effective leakage monitoring can still be obtained, avoiding the harm caused by the medium leakage without monitoring for a long time.

[0041] It should be noted that, since the equipment collection end of the medium recovery pipe 11 is connected to the recovery groove of the fatigue test equipment, and the medium temporary storage pipe 4 is connected to the temporary storage pipe connection end of the medium recovery pipe 11, the medium temporary storage pipe 4 is connected to the recovery groove of the fatigue test equipment through the medium recovery pipe 11. The leaked medium collected by the recovery groove of the fatigue test equipment is collected at the equipment collection end of the medium recovery pipe 11, flows into the medium recovery pipe 11 from the equipment collection end of the medium recovery pipe 11, and then flows into the medium temporary storage pipe 4 from the medium recovery pipe 11. As time goes by, the temporary storage amount of the leaked medium flowing into the medium temporary storage pipe 4 also changes continuously, which is finally reflected as the liquid level height inside the medium temporary storage pipe 4. Since the liquid level sensor 5 is installed inside the medium temporary storage pipe 4, the liquid level sensor 5 can monitor the liquid level height of the temporary storage medium inside the medium temporary storage pipe 4, so as to generate a liquid level height signal and transmit it to the upper computer for processing, so as to realize the control of the next step of action, such as alarm prompt, automatic stop of medium supply, automatic shutdown, etc. Even if the medium leaks slowly and the medium pressure fluctuation is extremely small, it is impossible to judge the medium leakage through the pressure fluctuation collected by the pressure sensor. In this case, effective leakage monitoring can still be achieved to avoid the harm caused by long-term unmonitored leakage of the medium.

[0042] In some preferred embodiments, when the host computer processes the liquid level height signal, the liquid level height of the temporary storage medium inside the temporary storage tube 4 is determined by the liquid level height signal. When the liquid level height of the temporary storage medium inside the temporary storage tube 4 reaches the preset liquid level threshold, the host computer controls the alarm device to issue a liquid level alarm. It should be noted that in this embodiment, the liquid level height in the temporary storage tube 4 is monitored by the liquid level sensor 5, and the signal is transmitted to the host computer. When the liquid level height exceeds the preset threshold, it means that the leakage amount has reached a certain extent, and a timely response can be made to ensure that the leakage situation is further monitored and controlled. For example, when the liquid level reaches the preset threshold, the alarm device will sound an alarm to remind the operator to pay attention. This monitoring method is particularly suitable for chronic or minor leaks that occur during fatigue testing, because these leaks are often difficult to monitor through pressure changes. Through liquid level monitoring, the accumulated amount of leakage can be accurately reflected, thereby providing a reliable warning for the operator. The liquid level threshold is set as the standard for the host computer to judge the degree of leakage. By reaching different thresholds, different levels of response measures can be triggered, so as to flexibly respond to different degrees of leakage and optimize the operation and maintenance of the equipment.

[0043] In some preferred embodiments, when the host computer processes the liquid level height signal, the liquid level height of the temporary storage medium inside the temporary storage tube 4 is determined by the liquid level height signal. When the liquid level height of the temporary storage medium inside the temporary storage tube 4 reaches the preset liquid level threshold, the host computer controls the medium supply system to stop supplying the medium to the fatigue test conduit. It should be noted that, compared with a simple alarm prompt, directly stopping the operation of the supply system can more actively prevent the expansion of medium leakage. When the liquid level reaches the preset threshold, it means that the leakage has accumulated to a certain extent. At this time, automatically cutting off the supply can effectively prevent the medium from continuing to leak and reduce losses from the source. In this embodiment, the design of the liquid level threshold triggering the supply stop can protect the test equipment and its working environment. Continuous supply of medium may cause excessive leakage, which may damage the fatigue test equipment or pollute the surrounding environment. Therefore, when the leakage reaches the warning level, stopping the supply immediately not only avoids secondary damage to the equipment, but also helps to maintain the safety of the test area. At the same time, when the liquid level threshold is reached, the supply is automatically stopped, and no manual intervention or manual confirmation is required. It can also greatly improve the response speed, help to quickly control the leakage situation, and avoid delays caused by human factors.

[0044] In some preferred embodiments, when the host computer processes the liquid level height signal, the liquid level height of the temporary storage medium inside the medium temporary storage tube 4 is determined by the liquid level height signal. When the liquid level height of the temporary storage medium inside the medium temporary storage tube 4 reaches a preset liquid level threshold, the host computer controls the fatigue test equipment to stop the test. It should be noted that fatigue testing needs to be carried out under specific conditions to ensure that the measured data is accurate and has reference value. Excessive leakage may change the medium pressure, temperature and other parameters of the test environment, causing the test conditions to no longer meet the standards and affect the reliability of the data. Stopping the test helps to avoid invalid or inaccurate test data caused by leakage. At the same time, when it is detected that the leakage exceeds the control range, the test is automatically stopped without human intervention, which can improve the level of automation, so that the equipment can protect itself without human monitoring, and reduce the risk of leakage expansion due to untimely human decision-making.

[0045] In some further preferred embodiments, when the host computer processes the liquid level height signal, the liquid level height of the temporary storage medium inside the temporary storage tube 4 is determined by the liquid level height signal. When the liquid level height of the temporary storage medium inside the temporary storage tube 4 reaches the preset liquid level threshold, the host computer first controls the alarm device to issue a liquid level alarm, then controls the medium supply system to stop supplying the medium to the fatigue test conduit, and finally controls the fatigue test equipment to stop the test work. It should be noted that when the liquid level reaches the threshold, the alarm is first triggered to immediately warn the operator, ensuring that the operator can be informed of the current leakage in time. Stop the medium supply immediately after the alarm is issued. Stopping the supply can cut off the leakage source and prevent the medium from continuing to flow into the test conduit, thereby effectively controlling the further expansion of the leakage. After the alarm is issued and the supply is stopped, the test work is stopped to ensure that the equipment enters a safe state after the leakage is controlled. It should be noted that in this embodiment, the alarm is first issued to notify the operator in time to ensure that the operator has the opportunity to intervene or prepare necessary measures. Before stopping the test, cut off the medium supply to prevent the leakage source from expanding. This can protect the equipment, control the leakage, and ensure the smooth execution of the subsequent shutdown action. If the equipment is shut down directly, it may stop suddenly under high load, which may cause impact damage to the equipment components. Executing in the order of alarm, stop supply, and stop test can make the shutdown action safer and more orderly.

[0046] In some preferred embodiments, the medium temporary storage tube 4 is a transparent medium temporary storage tube 4. Further, the transparent medium temporary storage tube 4 is a glass tube. It should be noted that the transparent glass material allows the operator to directly observe the liquid level, color and state of the medium in the temporary storage tube, intuitively judge the leakage situation, and facilitate initial detection or daily maintenance. In addition, the glass tube has excellent chemical stability and corrosion resistance, and is suitable for temporary storage of a variety of media, especially media with corrosive or high-purity requirements. Compared with plastic or metal materials, glass materials are not easy to react chemically with the medium, thereby ensuring the purity of the temporary storage medium for recycling. In addition, the transparent glass tube is also convenient for daily inspection and cleaning, which helps to find and clean possible sediments, crystals or foreign matter in the tube.

[0047] In some preferred embodiments, the medium recovery monitoring device further includes a lower end cover 2; the lower end cover 2 is connected to the bottom end of the medium temporary storage tube 4, and the bottom end of the medium temporary storage tube 4 is connected to the temporary storage tube connection end of the medium recovery tube 11, so that the medium temporary storage tube 4 is connected to the recovery groove of the fatigue testing device through the medium recovery tube 11. Further, the medium recovery monitoring device further includes a mounting bracket 1; the mounting bracket 1 is connected to the lower end cover 2, and supports the lower end cover 2, the medium temporary storage tube 4 and the medium recovery tube 11. It should be noted that the lower end cover 2 is connected to the bottom end of the medium temporary storage tube 4, and is sealed and connected to the temporary storage tube connection end of the medium recovery tube 11, which can prevent the medium from leaking from the connection port and ensure the closed flow of the medium during the recovery process. The mounting bracket 1 is connected to the lower end cover 2 and supports the entire device, including the medium temporary storage tube 4 and the medium recovery tube 11. The mounting bracket 1 can provide a solid installation foundation, ensure the stability of the device during operation, and improve the accuracy of the measurement. It should be noted that the lower end cover 2 is connected to the bottom end of the medium temporary storage tube 4, and the bottom end of the medium temporary storage tube 4 is connected to the temporary storage tube connection end of the medium recovery tube 11. This arrangement means that the medium flows from the medium recovery tube 11 into the bottom end of the medium temporary storage tube 4, and then accumulates from low to high in the medium temporary storage tube 4, thereby forming a change in the liquid level height in the medium temporary storage tube 4, allowing the liquid level sensor 5 to be tested.

[0048] In some preferred embodiments, the medium recovery monitoring device further includes an upper end cover 6; the upper end cover 6 is arranged at the top of the medium temporary storage tube 4 to seal the top of the medium temporary storage tube 4. It should be noted that the upper end cover 6 can seal the top of the temporary storage tube to prevent the medium from volatilizing or leaking during the temporary storage process, especially for volatile or toxic media, thereby maintaining the integrity of the medium in the tube, preventing external gas from entering or the medium in the tube from overflowing, and improving the sealing and safety of the entire recovery device. In addition, the closure of the upper end cover 6 helps to maintain the pressure stability inside the temporary storage tube and prevent pressure fluctuations caused by changes in the external environment, thereby making the monitoring of the liquid level sensor 5 more accurate. In addition, the upper end cover 6 is a detachable component, which is convenient for daily cleaning and maintenance. Maintenance personnel can open the upper end cover 6 when necessary to facilitate the inspection or cleaning of medium sediments or other residues in the tube to ensure the cleanliness and smoothness of the inside of the pipeline.

[0049] In some further preferred embodiments, the medium recovery monitoring device further includes a sealing ring 3; when the upper and lower ends of the medium temporary storage tube 4 are respectively connected to the upper end cover 6 and the lower end cover 2, the sealing ring 3 is installed in the connection gap for sealing. It should be noted that the sealing ring 3 is filled in the connection gap, which helps to eliminate the leakage points caused by the tiny gap, form an efficient seal, and ensure that the medium will not leak from the connection between the upper and lower end covers 2. In addition, the sealing ring 3 not only prevents the leakage of the medium, but also prevents external air, moisture, dust and other pollutants from entering the temporary storage tube through the gap, thereby protecting the purity of the medium in the tube and ensuring that the recovered medium is not affected by the external environment.

[0050] In some further preferred embodiments, the medium recovery monitoring device further comprises a medium discharge pipe 7, a valve 8 and a medium overflow pipe 9; the medium discharge pipe 7 is connected to the medium temporary storage pipe 4 through the valve 8, the medium overflow pipe 9 is connected to the upper end cover 6, and is connected to the medium overflow pipe 9 through the upper end cover 6; when the medium in the medium overflow pipe 9 is to be emptied, the valve 8 is opened, and the medium is automatically discharged through the medium discharge pipe 7; when the medium fills the medium temporary storage pipe 4, it automatically overflows to the receiving container through the medium overflow pipe 9, and the placement position of the receiving container is lower than the position of the upper end cover 6. It should be noted that the combination of the medium discharge pipe 7 and the valve 8 facilitates the regular discharge of the medium in the temporary storage pipe. When the medium in the temporary storage pipe needs to be emptied, the operator only needs to open the valve 8, and the medium can be safely discharged through the discharge pipe, which simplifies the discharge operation, reduces manpower input, and is helpful for daily maintenance and cleaning. When the medium in the medium temporary storage pipe 4 is full, the medium is automatically discharged to the receiving container through the overflow pipe connected to the upper end cover 6 to avoid the temporary storage pipe being overfilled. In addition, the receiving container is located below the upper end cover 6, which can ensure that the overflowed medium naturally flows into the receiving container under the action of gravity, thereby avoiding the accumulation of the medium in the temporary storage tube.

[0051] In some further preferred embodiments, the medium recovery monitoring device also includes a series bolt 10, which connects and compresses the lower end cover 2, the upper end cover 6 and the end of the liquid level sensor 5, and makes the medium temporary storage tube 4 pressed between the lower end cover 2 and the upper end cover 6 to form a whole. It should be noted that by tightly connecting the lower end cover 2, the upper end cover 6 and the medium temporary storage tube 4 through the series bolt 10, the gap at the connection can be effectively reduced, thereby improving the sealing of the device and preventing medium leakage. The tightly combined overall structure can better maintain pressure and sealing performance in fluid testing. In addition, the series bolt 10 connects and compresses the various components in series to form an integral structure, which can improve the mechanical strength and shock resistance of the device. In addition, the series bolt 10 can simplify the installation and disassembly process of the device. By tightening or loosening the bolts, the operator can easily assemble or disassemble the entire recovery monitoring device, which is convenient for maintenance, cleaning and inspection. In addition, the liquid level sensor 5 is fixed by the serial bolts 10, which can ensure that the sensor is always located at the set position and does not change position due to vibration or external force, thereby ensuring the accuracy and consistency of liquid level measurement.

[0052] The above is a description of the technical solution provided by the present invention. For those skilled in the art, according to the ideas of the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A medium recovery monitoring device, characterized in that: include: A medium recovery pipe, wherein the equipment collection end of the medium recovery pipe is connected to the recovery groove of the fatigue test equipment to uniformly collect the medium leaked from the catheter during the fatigue test; A medium temporary storage pipe, connected to the temporary storage pipe connection end of the medium recovery pipe, temporarily storing the medium collected uniformly by the medium recovery pipe; The liquid level sensor is installed inside the medium temporary storage tube and is used to monitor the liquid level height of the temporary storage medium inside the medium temporary storage tube to generate a liquid level height signal and transmit it to the host computer for processing.

2. The medium recovery monitoring device according to claim 1, characterized in that: When the host computer processes the liquid level height signal, the liquid level height of the temporary storage medium inside the temporary medium storage tube is determined by the liquid level height signal.

3. The medium recovery monitoring device according to claim 2, characterized in that: When the liquid level of the temporary storage medium inside the temporary storage pipe reaches a preset liquid level threshold, the host computer controls the alarm device to issue a liquid level alarm.

4. The medium recovery monitoring device according to claim 2, characterized in that: When the liquid level of the temporary storage medium inside the temporary storage pipe reaches a preset liquid level threshold, the host computer controls the medium supply system to stop supplying the medium to the fatigue test conduit.

5. The medium recovery monitoring device according to claim 2, characterized in that: When the liquid level of the temporary storage medium inside the temporary storage pipe reaches a preset liquid level threshold, the host computer controls the fatigue testing device to stop the testing operation.

6. The medium recovery monitoring device according to claim 1, characterized in that: The medium temporary storage tube is a transparent medium temporary storage tube.

7. The medium recovery monitoring device according to claim 6, characterized in that: The transparent medium temporary storage tube is a glass tube.

8. The medium recovery monitoring device according to any one of claims 1 to 7, characterized in that: It also includes a lower end cover; the lower end cover is connected to the bottom end of the medium temporary storage tube, and the bottom end of the medium temporary storage tube is connected to the temporary storage tube connecting end of the medium recovery tube, so that the medium temporary storage tube is connected to the recovery groove of the fatigue testing equipment through the medium recovery tube.

9. The medium recovery monitoring device according to claim 8, characterized in that: It also includes a mounting bracket; the mounting bracket is connected to the lower end cover to support the lower end cover, the medium temporary storage pipe and the medium recovery pipe.

10. The medium recovery monitoring device according to any one of claims 1 to 7, characterized in that: It also includes an upper end cover; the upper end cover is arranged on the top end of the medium temporary storage tube to seal the top end of the medium temporary storage tube.

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