A multi-station airtightness testing device for sodium hypochlorite tubes

Abstract

This invention relates to the field of medical device testing technology, specifically to a multi-station airtightness testing device for a thiopancreatography (Thio) tube. The device includes a base and a detector mounted on the base. The detector includes an adjusting roller, a liquid supply system, and a pressure detection element. The adjusting roller is horizontally positioned and rotatable around its own axis, and has a conical roller section. During testing, the thiopancreatography (Thio) tube is spirally wound around the conical roller section, with both ends detachably mounted on the adjusting roller. The liquid supply system introduces liquid with a preset pressure into the thiopancreatography (Thio) tube from one end near the smaller end of the conical roller section. The pressure detection element detects the pressure of the liquid discharged from the other end of the thiopancreatography (Thio) tube. By rotating the adjusting roller, the centrifugal force on the liquid inside the thiopancreatography (Thio) tube is made opposite in direction to the frictional force, thereby reducing the influence of friction on the liquid pressure and ensuring a large pressure difference between the inside and outside of the thiopancreatography (Thio) tube throughout its operation, reducing misjudgments caused by excessively small pressure differences.

Description

Technical Field

[0001] This invention relates to the field of medical device testing technology, and in particular to a multi-station airtightness testing device for a hysteresis tube. Background Technology

[0002] The hypotube is an ultra-fine metal capillary tube used in minimally invasive interventional surgery. It is a key component of the balloon dilation catheter system. Its main function is to transmit thrust and torque, helping the operator to smoothly deliver instruments such as balloons and stents to the lesion site.

[0003] Because the sodium hypochlorite tube needs to withstand intravascular pressure and come into contact with blood within the human body, its airtightness is a key indicator for evaluating product quality. Therefore, airtightness testing is an indispensable quality control step in the manufacturing process. Currently, the mainstream airtightness testing methods include the water pressure test, the soap water test, and the gas test. Among these, the water pressure test is widely used due to its relatively simple operation and intuitive results. Its core testing principle is to introduce water at a certain pressure into a closed system and then measure the pressure of the outlet water. The airtightness of the closed system is determined by the pressure change.

[0004] However, due to the small diameter of the submersible tube, there is a significant flow loss when water flows inside it. This results in lower water pressure and a smaller pressure difference between the water and the outside environment as the water approaches the outlet. Consequently, when a leak occurs near the outlet, the small pressure difference leads to a smaller leakage, which in turn has less impact on the final pressure of the water discharged from the outlet. This makes it more difficult to determine whether a leak has occurred in the submersible tube, affecting the accuracy of the detection results. Summary of the Invention

[0005] Therefore, it is necessary to provide a multi-station airtightness testing device for hysteresis tubes to address the problem of low accuracy in the current hysteresis tube airtightness testing process.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A multi-station air tightness testing device for a sub-thickness tube, the multi-station air tightness testing device for a sub-thickness tube includes a base and a detector disposed on the base;

[0008] The detector includes an adjusting roller, a liquid supply system, and a pressure detection element. The adjusting roller is horizontally positioned and rotatable around its own axis, and has a conical roller section. The sodium hypochlorite tube is spirally wound around the conical roller section during detection, and its two ends are detachably mounted on the adjusting roller. The liquid supply system is configured to allow liquid with a preset pressure to be introduced into the sodium hypochlorite tube from one end near the smaller end of the conical roller section. The pressure detection element is configured to detect the pressure of the liquid discharged from the other end of the sodium hypochlorite tube.

[0009] Furthermore, the detector also includes a switching part, which includes a first base ring and a second base ring. The first base ring and the second base ring are both sleeved on the adjusting roller and are arranged at intervals along the axial direction of the adjusting roller, and are connected by friction strips. The friction strips are spirally arranged and form a friction fit with the sodium hypotube. The switching part and the adjusting roller are capable of relative rotation.

[0010] Furthermore, there are multiple friction strips, which are arranged circumferentially.

[0011] Furthermore, the adjusting roller also has a circular roller section, and the circular roller section and the conical roller section are connected in one direction by a one-way component; one end of the hyaluronic acid tube is detachably mounted on the circular roller section.

[0012] Furthermore, the unidirectional component includes a plurality of ratchet teeth, a portion of which are arranged circumferentially on the circular roller section and another portion of which are arranged circumferentially on the conical roller section, and any portion of which can elastically slide in the radial direction.

[0013] Furthermore, the adjusting roller is provided with two elastic clamping parts, which are configured to elastically clamp the two ends of the sodium hypotube respectively.

[0014] Furthermore, the elastic clamping part is an annular airbag.

[0015] Furthermore, a support sleeve is fitted onto the conical roller section. The support sleeve is made of an elastic material and is configured to support the hyaluronic acid tube.

[0016] Furthermore, the elastic material is rubber.

[0017] Furthermore, the number of the detectors is multiple.

[0018] The beneficial effects of this invention are:

[0019] This invention relates to a multi-station airtightness testing device for a submersible tube. By setting an adjusting roller and utilizing the conical structure, rotational motion, spiral winding of the submersible tube, and the characteristic that liquid enters from the end of the submersible tube closest to the small end of the adjusting roller, the device ensures that the centrifugal force on the liquid inside the submersible tube is opposite to the frictional force during airtightness testing. This reduces the influence of friction on liquid pressure, ensuring a large pressure difference between the inside and outside of the submersible tube, and thus ensuring a large water leakage. The leakage significantly affects the pressure of the water discharged from the outlet of the submersible tube, facilitating the determination of whether a leak has occurred and improving the accuracy of the test results. Attached Figure Description

[0020] Figure 1 A three-dimensional structural schematic diagram of the multi-station airtightness testing device for a submersible tube provided in an embodiment of the present invention;

[0021] Figure 2 This is a top view of the multi-station airtightness testing device for submersible tubes provided in an embodiment of the present invention.

[0022] Figure 3 for Figure 2 Sectional view along the AA direction;

[0023] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point Y in the middle;

[0024] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point Z in the middle;

[0025] Figure 6 This is an exploded view of the components of the multi-station airtightness testing device for submersible tubes provided in an embodiment of the present invention.

[0026] in:

[0027] 1. Base; 101. Mounting box;

[0028] 2. Detector; 201. Adjusting roller; 2011. Conical roller section; 20111. Slot; 2012. Circular roller section; 20121. First flow channel; 20122. Second flow channel; 20123. Insert protrusion; 2021. Inlet pipe; 2022. Outlet pipe; 203. First transmission belt; 204. Switching unit; 2041. First base ring; 2042. Second base ring; 2043. Friction strip; 205. Second transmission belt; 206. Ratchet; 207. Annular airbag; 208. Support sleeve;

[0029] 3. Hypobo air filter. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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 limiting the invention.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] In the current process of testing the airtightness of the hyaluronic acid tube 3 using a water pressure test, due to the "ultra-small diameter" structural characteristics of the hyaluronic acid tube 3, the proportion of friction between the water and the inner wall of the hyaluronic acid tube 3 is significantly increased when water flows inside the hyaluronic acid tube 3. This results in flow losses far greater than those in conventional diameter pipes. This flow loss leads to a significant pressure attenuation gradient along the axial direction of the hyaluronic acid tube 3—the farther away from the water inlet of the hyaluronic acid tube 3, the lower the water pressure compared to the initial pressurization value, and the smaller the pressure difference between the inside and outside of the hyaluronic acid tube 3.

[0034] This pressure decay phenomenon is particularly problematic for detection when the leak point is near the outlet of tube 3. When the leak point is close to the outlet of tube 3, the water pressure in that area has already dropped to a low level due to long-distance flow loss, resulting in a very small pressure difference with the external environment. Driven by this minimal pressure difference, the flow rate of the leaking water will be significantly reduced, potentially resulting in only a trace seepage. This weak leak is not only difficult to detect using conventional pressure monitoring methods, but it also has no significant impact on the pressure of the water discharged from the outlet of tube 3. This makes it difficult for inspectors to judge the leak from pressure changes or visual observation, ultimately leading to a significant decrease in the sensitivity of the hydrostatic testing method for detecting leaks at distant points, making it impossible to reliably identify such potential quality issues.

[0035] Based on this, the present invention provides a multi-station airtightness testing device for hysteresis tubes, which is particularly suitable for airtightness testing of hysteresis tubes 3. Of course, it is also suitable for airtightness testing of other pipes with smaller diameters.

[0036] Specifically, refer to Figures 1 to 6 As shown, the multi-station airtightness testing device for the hysteresis tube is configured to include a base 1 and a detector 2 mounted on the base 1. To facilitate the installation of the detector 2, the base 1 has a mounting box 101 with an open top. The detector 2 is installed inside the mounting box 101 during installation.

[0037] The detector 2 includes an adjusting roller 201, a liquid supply system, and a pressure detection element. The liquid supply system includes an inlet pipe 2021, an outlet pipe 2022, a storage container (not shown), and a pump (not shown). The inlet pipe 2021 is mounted on the base 1 and located on the front side of the mounting box 101, and has a horizontal section that extends horizontally backward and penetrates the front side wall of the mounting box 101. The outlet pipe 2022 is mounted on the base 1 and located on the rear side of the mounting box 101, and is arranged parallel to the inlet pipe 2021. The outlet pipe 2022 has a horizontal section that extends horizontally forward and penetrates the rear side wall of the mounting box 101. The storage container stores liquid and is connected to the outlet end of the outlet pipe 2022. The pump's suction end is connected to the storage container, and its discharge end is connected to the inlet end of the inlet pipe 2021.

[0038] The adjusting roller 201 is horizontally positioned and extends horizontally in the front-to-back direction. Its front end is coaxially and rotatably sleeved on the horizontal section of the inlet pipe 2021, and its rear end is coaxially and rotatably sleeved on the horizontal section of the outlet pipe 2022, so that the adjusting roller 201 can rotate around its own axis. The adjusting roller 201 has a coaxially arranged conical roller section 2011 and two circular roller sections 2012, one large and one small. The small end of the conical roller section 2011 is in front, and the small circular roller section 2012 is in front, coaxially and rotatably sleeved on the horizontal section of the inlet pipe 2021. The large circular roller section 2012 is in the rear, coaxially and rotatably sleeved on the horizontal section of the outlet pipe 2022.

[0039] To facilitate the provision of driving force for the rotation of the adjusting roller 201, the detector 2 is configured to also include a first driving assembly. The first driving assembly includes a first driving motor, which is mounted on the base 1, with the motor shaft and the adjusting roller 201 arranged in parallel. A first pulley is fixedly sleeved on the motor shaft. A first transmission belt 203 is sleeved on the first pulley and the large circular roller section 2012 to facilitate the rotation of the adjusting roller 201.

[0040] A first flow channel 20121 is formed within the small cylindrical roller segment 2012. The first flow channel 20121 has a T-shaped structure and includes a horizontal section and a vertical section. The horizontal section of the first flow channel 20121 is coaxially arranged with the small cylindrical roller segment 2012 and communicates with the inlet pipe 2021. The vertical section of the first flow channel 20121 extends radially along the small cylindrical roller segment 2012 and communicates with the outside. A second flow channel 20122 is formed within the large cylindrical roller segment 2012. The second flow channel 20122 has a T-shaped structure and includes a horizontal section and a vertical section. The horizontal section of the second flow channel 20122 is coaxially arranged with the large cylindrical roller segment 2012 and communicates with the outlet pipe 2022. The vertical section of the second flow channel 20122 extends radially along the large cylindrical roller segment 2012 and communicates with the outside. The vertical sections of the first flow channel 20121 and the second flow channel 20122 can be arranged opposite each other. During testing, the hyaluronic acid tube 3 is spirally wound around the conical roller section 2011, and its two ends are detachably mounted on the adjusting roller 201. Specifically, the two ends of the hyaluronic acid tube 3 are respectively frictionally inserted into the vertical sections of the first flow channel 20121 and the second flow channel 20122, and are respectively connected to the vertical sections of the first flow channel 20121 and the second flow channel 20122. Under the action of the liquid supply system, liquid with a preset pressure is introduced into the hyaluronic acid tube 3 from the end near the small end of the conical roller section 2011, so that the liquid forms a circulation path of liquid storage container, liquid pump, liquid inlet pipe 2021, first flow channel 20121, hyaluronic acid tube 3, second flow channel 20122, liquid outlet pipe 2022, and liquid storage container.

[0041] The pressure sensing element is configured to detect the pressure of the liquid discharged from the other end of the hysteresis tube 3; specifically, the pressure sensing element can be set as a water pressure sensor and set at the outlet pipe 2022 to facilitate sensing the pressure of the liquid flowing through the outlet pipe 2022.

[0042] Before testing, first insert the front end of the hyaluronic acid tube 3 into the vertical section of the first flow channel 20121; then hold the other end of the hyaluronic acid tube 3; then start the first drive motor, which drives the adjusting roller 201 to rotate through the first pulley and the first transmission belt 203, so that the hyaluronic acid tube 3 is gradually spirally wound on the conical roller section 2011; when the hyaluronic acid tube 3 is about to be spirally wound on the conical roller section 2011, turn off the first drive motor, and then insert the rear end of the hyaluronic acid tube 3 into the vertical section of the second flow channel 20122.

[0043] During the testing process, the liquid pump is first started to form a circulating flow path consisting of the liquid storage container, the liquid pump, the liquid inlet pipe 2021, the first flow channel 20121, the hyaluronic acid tube 3, the second flow channel 20122, the liquid outlet pipe 2022, and the liquid storage container. Then, the first drive motor is started, which drives the adjusting roller 201 to rotate through the first pulley and the first transmission belt 203. Then, the pressure of the liquid flowing through the liquid outlet pipe 2022 is sensed by the pressure detection device. When the liquid pressure is within the preset range, it indicates that the hyaluronic acid tube 3 has good air tightness. When the liquid pressure is not within the preset range, it indicates that the hyaluronic acid tube 3 has poor air tightness.

[0044] During the rotation of the regulating roller 201, the hyaluronic acid tube 3 rotates synchronously with the regulating roller 201. Due to the influence of the circular motion, the liquid inside the hyaluronic acid tube 3 will generate an outward centrifugal force, which will give the liquid a tendency to move from the small end to the large end of the conical roller section 2011.

[0045] Under the driving force of the liquid pump, the liquid flows directionally from the small end to the large end of the conical roller section 2011 along the wave tube 3. During the flow, the contact between the liquid and the inner wall of the wave tube 3 will generate a frictional force that hinders the flow. The direction of this frictional force is opposite to the direction of liquid flow, that is, from the large end to the small end of the conical roller section 2011.

[0046] Since the centrifugal force acts in the opposite direction to the frictional force, they cancel each other out, effectively reducing the pressure loss caused by friction. This effect ensures that the liquid inside the hyaluronic acid tube 3 maintains a high pressure level throughout the entire flow path, thus guaranteeing a stable and sufficient pressure difference between the inside and outside of the tube.

[0047] A sufficient pressure difference between the inside and outside of the pipe will significantly increase the amount of liquid leakage at the leak point. Even if the leak point is close to the outlet of the hyaluronic acid pipe 3, it can still form a leak of a detectable scale. This obvious change in leakage will be directly reflected in the discharge pressure at the outlet of the hyaluronic acid pipe 3, allowing the pressure detection device to clearly sense the pressure fluctuation, thereby accurately determining whether there is a leak in the hyaluronic acid pipe 3 and greatly improving the accuracy of the detection results.

[0048] At the same time, the increased leakage volume ensures that droplets or liquid flows are easily observed regardless of the size of the leak point, avoiding the problem of difficult identification of trace penetrations and helping inspectors quickly locate the specific location of the leak.

[0049] It should be noted that during the rotation of the hyaluronic acid tube 3 driven by the adjusting roller 201, the liquid inside the tube always tends to move outwards due to centrifugal force. The impact of this tendency on the leakage amount varies depending on the location of the leakage point: when the leakage point is located on the outside of the hyaluronic acid tube 3, the centrifugal force will push the liquid towards the leakage point, thereby ensuring that there is enough liquid overflow at the leakage point to ensure that this type of leakage can be effectively captured; however, when the leakage point is located on the inside of the hyaluronic acid tube 3, the centrifugal force will cause the liquid to move away from the leakage point, which will inhibit the liquid from seeping out from the leakage point, resulting in a significant reduction in the leakage amount, and even the possibility that a small amount of leakage may be difficult to detect, forming a detection blind zone.

[0050] To completely eliminate this blind spot and ensure the comprehensive accuracy of the test results, the airtightness of both the inner and outer sides of the hyaluronic acid tube 3 needs to be verified. The specific operating procedure is as follows: After completing the first round of testing, firstly, remove both ends of the hyaluronic acid tube 3 from the vertical sections of the first flow channel 20121 and the second flow channel 20122, respectively, and release the fixed relationship between the hyaluronic acid tube 3 and the adjusting roller 201; then, rotate the hyaluronic acid tube 3 180 degrees around its own axis, so that the tube wall that was originally facing inward turns outward and the tube wall that was originally facing outward turns inward, realizing the complete exchange of the inner and outer positions of the hyaluronic acid tube 3; finally, reinstall the two ends of the hyaluronic acid tube 3 after the position exchange into the vertical sections of the first flow channel 20121 and the second flow channel 20122, and repeat the previous airtightness testing procedure. This operation allows the inner leak point, which may be suppressed by centrifugal force in the first round of testing, to become the outer leak point in the second round of testing. With the assistance of centrifugal force, the leak becomes obvious, thus achieving a complete test of the airtightness of the entire circumferential wall of the hyaluronic acid tube 3, avoiding misjudgment or missed judgment due to the location of the leak point.

[0051] In a further embodiment, to improve ease of operation, the detector 2 is further configured to include a switching part 204, which includes a first base ring 2041 and a second base ring 2042. The first base ring 2041 and the second base ring 2042 are both sleeved on the adjusting roller 201 and are arranged at intervals along the axial direction of the adjusting roller 201, and are connected by friction strips 2043. The first base ring 2041 is coaxial and rotatably sleeved on the smaller circular roller segment 2012, and the second base ring 2042 is coaxial and rotatably sleeved on the larger circular roller segment 2012. The friction strips 2043 are spirally arranged and form a friction fit with the sodium hypochlorite tube 3, which facilitates simultaneous contact with the sodium hypochlorite tube 3 along the axial direction. The switching part 204 and the adjusting roller 201 can rotate relative to each other, so that under the action of friction, the sodium hypochlorite tube 3 is synchronously driven to rotate slowly along its own axis. This rotation process can change the relative position of the hyaluronic acid tube 3 and the central axis of the adjusting roller 201 in real time, so that the tube wall originally facing the inside of the adjusting roller 201 gradually turns to the outside, and the tube wall originally facing the outside gradually turns to the inside, realizing the dynamic position switching of the tube wall of the hyaluronic acid tube 3 in the whole circumference. The detection blind zone formed by the leak point being located on the inside can be eliminated without manual disassembly and reassembly.

[0052] To facilitate the provision of driving force for the rotation of the switching part 204, the detector 2 is configured to also include a second driving assembly. The second driving assembly includes a second driving motor, which is mounted on the base 1. The motor shaft and the adjusting roller 201 are arranged in parallel, and a second pulley is fixedly sleeved on the motor shaft. A second transmission belt 205 is sleeved on the second pulley and the first base ring 2041 to facilitate the rotation of the switching part 204.

[0053] During use, by setting the speeds of the first drive motor and the second drive motor to be different, the adjusting roller 201 and the switching part 204 can rotate relative to each other.

[0054] In a further embodiment, to improve the stability of the sodium hypochlorite tube 3 during rotation, multiple friction strips 2043 are provided, arranged circumferentially. Thus, by ensuring that each friction strip 2043 maintains a direction adapted to the spiral trajectory of the sodium hypochlorite tube 3, stable frictional contact with the outer wall of the sodium hypochlorite tube 3 is ensured. This allows the driving force to be distributed to different circumferential positions of the sodium hypochlorite tube 3, making the frictional force at each contact point on the outer wall of the sodium hypochlorite tube 3 uniform in magnitude and coordinated in direction, avoiding rotational instability caused by local force imbalance.

[0055] In some embodiments, to enable the winding of longer lengths of the sodium hypochlorite tube 3 and improve applicability, a slot 20111 is provided on the rear end face of the conical roller segment 2011; an insertion protrusion 20123 is provided on the front end face of the larger circular roller segment 2012. The insertion protrusion 20123 is a two-stage concentric cylindrical structure, coaxially arranged with the larger circular roller segment 2012, and can be inserted into the slot 20111. The insertion protrusion 20123 and the slot 20111 have the same shape; the larger circular roller segment 2012 and the conical roller segment 2011 are connected by a one-way member to form a one-way rotational connection. Under the action of the one-way member, the larger circular roller segment 2012 and the conical roller segment 2011 can rotate together in the forward direction, which facilitates the synchronous rotation of the sodium hypochlorite tube 3. When the larger circular roller segment 2012 rotates in the reverse direction, the conical roller segment 2011 remains stationary, and the sodium hypochlorite tube 3 can continue to be spirally wound on the conical roller segment 2011, thereby enabling the winding of a longer length and improving applicability.

[0056] Specifically, in this embodiment, the one-way component is configured to include multiple ratchet teeth 206, some of which are arranged circumferentially on the circumferential sidewall of the rear cylinder of the insertion protrusion 20123, and other ratchet teeth 206 are arranged circumferentially on the rear circumferential sidewall of the slot 20111, which facilitates the formation of a one-way engagement; at the same time, any part of the ratchet teeth 206 is connected to the rear cylinder of the insertion protrusion 20123 or to the conical roller section 2011 through a compression spring to avoid motion interference.

[0057] In other embodiments, to reduce the impact of deformation of the thiocyanate tube 3 on the liquid pressure, two elastic clamping portions are provided on the adjusting roller 201. These two elastic clamping portions are located within the vertical sections of the first flow channel 20121 and the second flow channel 20122, respectively, and are both configured to elastically clamp the end of the thiocyanate tube 3. This avoids deformation of both the sidewall of the vertical section of the first flow channel 20121 and the thiocyanate tube 3 due to rigid collision, thereby reducing the impact of deformation of the thiocyanate tube 3 on the liquid pressure.

[0058] Specifically, in this embodiment, the elastic clamping part can be configured as an annular airbag 207. The two annular airbags 207 are respectively fixedly inserted into the vertical section of the first flow channel 20121 and the vertical section of the second flow channel 20122 during installation; the sodium thiosulfate tube 3 is inserted into the annular airbag 207 during installation.

[0059] In other embodiments, the elastic clamping portion may also be configured as an annular liquid bladder or a rubber ring.

[0060] In other embodiments, to reduce the impact on liquid pressure caused by deformation of the hyaluronic acid tube 3, a support sleeve 208 is fitted onto the conical roller section 2011. The support sleeve 208 is made of an elastic material and configured to support the hyaluronic acid tube 3. This avoids deformation caused by rigid collision between the conical roller section 2011 and the hyaluronic acid tube 3.

[0061] In this specific embodiment, the elastic material can be rubber.

[0062] In other embodiments, the elastic material may also be an elastic fiber, such as spandex, polyolefin elastic fiber, etc.

[0063] In other embodiments, to improve detection efficiency, the number of detectors 2 is set to be multiple, and the multiple detectors 2 can be arranged side by side; in this way, multiple detectors 2 can simultaneously perform airtightness detection on multiple sodium hypochlorite tubes 3, which helps to improve detection efficiency.

[0064] As an example, the number of detectors 2 can be set to three, arranged side by side in the left-right direction.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A multi-station airtightness testing device for sodium hypochlorite tubes, characterized in that, The multi-station air tightness testing device for the sodium thiosulfate tube includes a base and a detector mounted on the base; The detector includes an adjusting roller, a liquid supply system, and a pressure detection element. The adjusting roller is horizontally positioned and rotatable around its own axis. It has a coaxially arranged conical roller section and two circular roller sections, one large and one small. The circular roller sections and the conical roller section are connected by a one-way component to form a unidirectional rotatable connection. During detection, the sodium hypochlorite tube is spirally wound around the conical roller section, and both ends are detachably mounted on the adjusting roller. The liquid supply system is configured to allow liquid with a preset pressure to be introduced into the sodium hypochlorite tube from one end near the smaller end of the conical roller section. The pressure detection element is configured to detect the pressure of the liquid discharged from the other end of the sodium hypochlorite tube. The detector further includes a switching unit, which includes a first base ring and a second base ring. The first base ring and the second base ring are both sleeved on the adjusting roller and are arranged at intervals along the axial direction of the adjusting roller, with friction strips connecting them. The friction strips are spirally arranged and form a frictional engagement with the sodium hypotube. The switching unit and the adjusting roller can rotate relative to each other. There are multiple friction strips, which are arranged circumferentially. The first base ring is coaxial and rotatably sleeved on a smaller circular roller segment, and the second base ring is coaxial and rotatably sleeved on a larger circular roller segment.

2. The multi-station airtightness testing device for sodium hypochlorite tubes according to claim 1, characterized in that, The unidirectional component includes multiple ratchet teeth. A portion of the ratchet teeth are arranged circumferentially on the circular roller section, and another portion of the ratchet teeth are arranged circumferentially on the conical roller section. Any portion of the ratchet teeth can slide elastically in the radial direction.

3. The multi-station airtightness testing device for sodium hypochlorite tubes according to claim 1, characterized in that, The adjusting roller is provided with two elastic clamping parts, which are configured to elastically clamp the two ends of the sodium hypotube respectively.

4. The multi-station airtightness testing device for sodium hypochlorite tubes according to claim 3, characterized in that, The elastic clamping part is a ring-shaped airbag.

5. The multi-station airtightness testing device for sodium hypochlorite tubes according to claim 1, characterized in that, A support sleeve is fitted onto the conical roller section. The support sleeve is made of elastic material and is configured to support the hyaluronic acid tube.

6. The multi-station airtightness testing device for sodium hypochlorite tubes according to claim 5, characterized in that, The elastic material is rubber.

7. The multi-station airtightness testing device for sodium hypochlorite tubes according to claim 1, characterized in that, There are multiple detectors.

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