A medical oxygen humidifier leakage and pressure strength testing device

Abstract

The utility model provides a kind of medical oxygen humidifier leakage and pressure strength testing device, including protection box subassembly and fixed subassembly;Protection box subassembly includes box and lid, lid is hinged in box top portion;Fixed subassembly is placed in box;Fixed subassembly includes base, stand and fixing piece, stand is fixedly installed in base top surface, fixing piece includes sliding seat and the fixed clamp of fixed installation in the one side of sliding seat, sliding seat is slidably installed on stand, fixed clamp fixes the medical oxygen humidifier to be tested, places fixed subassembly in the box that is filled with water, so that medical oxygen humidifier is immersed in water, so that leakage test is simple and easy to use. Close the lid, protect medical oxygen humidifier, prevent bottle body breakage and produce splashing of debris. Testing device can satisfy leakage and pressure strength two test requirements in turn, provide safety and convenience for test personnel, and multiple medical oxygen humidifiers can be inspected simultaneously at a time, to improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical device testing and inspection technology, specifically to a device for testing the leakage and pressure resistance of a medical oxygen humidifier. Background Technology

[0002] Medical oxygen humidifiers are commonly used in oxygen therapy. They work by passing oxygen through a small container filled with water, mixing the oxygen and water to form tiny aerosols that are delivered directly to the patient's nasal cavity or mouth, thus helping the patient inhale an appropriate amount of humidified oxygen. Medical oxygen humidifiers must meet the leakage test requirements in Clause 7.4 and the pressure resistance test requirements in Clause 8 of the standard YY / T 1610-2018 "Medical Oxygen Humidifiers for Anesthesia and Respiratory Equipment" to ensure their safe and effective use.

[0003] Currently, leakage tests and pressure resistance tests are generally conducted sequentially. During leakage tests, the tester holds a medical oxygen humidifier and immerses it in a water tank. Because the humidifier contains gas, it experiences significant buoyancy, and this process needs to be maintained for at least 3 minutes. The entire process is time-consuming, labor-intensive, and inefficient. While the subsequent pressure resistance test eliminates the need for the tester to hold the humidifier, allowing it to float on the water, there is a risk of the pressurized humidifier rupturing and scattering fragments. The water tank does not provide protection against such fragments. Therefore, there is an urgent need for a testing device that can simultaneously meet the requirements of both leakage and pressure resistance tests to solve these problems. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a testing device that can simultaneously meet the testing requirements for both leakage and pressure resistance of medical oxygen humidifiers. This device can both fix the medical oxygen humidifier and immerse it in water during leakage testing, and protect the medical oxygen humidifier during pressure resistance testing to prevent the bottle from rupturing and causing fragments to fly.

[0005] The present invention adopts the following technical solution: a medical oxygen humidifier leakage and pressure resistance testing device, comprising a protective box assembly and a fixing assembly; the protective box assembly comprises a box body and a box cover, the box cover being hinged to the top of the box body for sealing the top opening of the box body; the fixing assembly is placed inside the box body;

[0006] The fixing assembly includes a base, a column, and a fixing member. At least one column is fixedly installed on the top surface of the base. The fixing member includes a sliding seat and a fixing clip fixedly installed on one side of the sliding seat. The sliding seat is fixedly installed on the column and can slide vertically along the column. The fixing clip is used to fix the medical oxygen humidifier to be tested.

[0007] Furthermore, the sliding seat includes a first slider and a first locking knob. A through hole is provided in the center of the first slider. The first slider is fitted onto the column through the through hole and can slide along the column. The fixing clamp is fixedly installed on one side of the first slider through a connecting rod.

[0008] The first locking knob includes a screw and a knob head fixed to one end of the screw. A threaded hole perpendicular to and connected to the through hole is provided on the side of the first slider. The screw is screwed onto the threaded hole by the thread, and the other end of the screw can enter the through hole.

[0009] Furthermore, the fixing clamp includes a first clamping body, a second clamping body, a bolt, and a wing nut. The rear ends of the first clamping body and the second clamping body are hinged together. The bolt passes through a through hole in the middle of the first clamping body and exits through a second strip-shaped through groove in the middle of the second clamping body along the length of the second clamping body. The wing nut is threaded onto the exit end of the bolt. The front ends of the first clamping body and the second clamping body form opposing V-shaped clamping portions.

[0010] Furthermore, a flexible pad is fixed on the inner side of the V-shaped clamping part.

[0011] Furthermore, multiple fasteners are provided, and a crossbar perpendicular to the column is fixedly connected between the multiple sliding seats.

[0012] Furthermore, graduations are provided on the side of the box along the height direction.

[0013] Furthermore, the fixing assembly also includes a measuring component, which includes a second slider, a second locking knob, a hinge seat, and an indicator. A through hole is provided in the center of the second slider, through which the second slider is fitted onto the column and can slide along the column. The second locking knob includes a screw and a knob head fixed to one end of the screw. A threaded hole perpendicular to and connected to the through hole is provided on the side of the second slider. The screw is screwed onto the threaded hole, and the other end of the screw can enter the through hole.

[0014] The hinge seat is fixed to the side of the second slider, and one end of the indicator is hinged to the hinge seat. The indicator extends horizontally and can rotate horizontally relative to the hinge seat.

[0015] Furthermore, the box body and the box lid are made of transparent material. There are two box lids, which are designed to open in opposite directions. The two box lids are hinged to the top of the box body on the opposite side. A handle is fixedly installed on the top surface of the two box lids on the side that are close to each other. Each handle has a recessed part.

[0016] A hook is installed between the two handles. The hook includes an extension rod and a collar and a hook respectively fixedly installed at both ends of the extension rod. The collar is fitted onto the recess of one handle and the hook can rotate around the handle. The hook can be hooked onto the recess of the other handle.

[0017] Furthermore, a reserved channel is provided on the lid, which is a first strip-shaped through groove on the lid.

[0018] Beneficial Effects: The medical oxygen humidifier testing device in this patent can meet the requirements of performing both leakage and pressure resistance tests sequentially. During leakage testing, the medical oxygen humidifier under test is fixed to the clamp of the fixing component, which is then placed in a water-filled tank, immersing the humidifier in the water, making the leakage test simple and labor-saving. During pressure resistance testing, the tank lid is closed to protect the medical oxygen humidifier and prevent the cylinder from breaking and causing fragments to fly. The medical oxygen humidifier testing device provides safety and convenience for testing personnel and can simultaneously test multiple medical oxygen humidifiers, thereby improving work efficiency. Attached Figure Description

[0019] Appendix Figure 1 This is a three-dimensional structural diagram of the testing device in this utility model.

[0020] Appendix Figure 2 This is a three-dimensional structural diagram of the testing device after removing the box cover 12 in this utility model.

[0021] Appendix Figure 3 This is a three-dimensional structural diagram of the protective box component 1 in this utility model.

[0022] Appendix Figure 4 This is a three-dimensional structural diagram of the fixing component 2 in this utility model.

[0023] Appendix Figure 5 This is a three-dimensional structural diagram of the fixing member 23 in this utility model. Figure 1 .

[0024] Appendix Figure 6 This is a three-dimensional structural diagram of the fixing member 23 in this utility model. Figure 2 .

[0025] Appendix Figure 7 This is a three-dimensional structural diagram of the measuring component 25 in this utility model.

[0026] The reference numerals in the attached drawings are explained as follows: Protective box assembly 1, box body 11, scale 111, box cover 12, first strip-shaped through groove 121, handle 13, hook 14, fixing assembly 2, base 21, column 22, fixing piece 23, first slider 231, first locking knob 232, connecting rod 233, first clamp 234, second clamp 235, bolt 236, second strip-shaped through groove 237, wing nut 238, crossbar 24, measuring piece 25, second slider 251, second locking knob 252, hinge seat 253, indicator 254. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The content of the utility model will be further explained below in conjunction with the drawings:

[0028] Example 1

[0029] See attached document Figure 1 , 2 This embodiment provides a medical oxygen humidifier leakage and pressure resistance testing device, including a protective box assembly 1 and a fixing assembly 2, with the fixing assembly 2 placed inside the protective box assembly 1.

[0030] See attached document Figure 3 The protective enclosure assembly 1 includes a enclosure body 11 and an enclosure lid 12 made of transparent material, specifically acrylic, PC, PETG, and PVC, allowing direct observation of the internal testing conditions through the enclosure body 11 and enclosure lid 12. The enclosure body 11 is a hollow structure with an open top, containing water for testing. A drain pipe with a switch is connected to the lower part of the outer side of the enclosure body 11 to drain the water. There are two enclosure lids 12, which are designed to open outwards. The two lids 12 are hinged to the top of the enclosure body 11 on opposite sides to close the top opening of the enclosure body 11.

[0031] A handle 13 is fixedly installed on the top surface of each of the two lids 12 on one side, which facilitates opening the lids 12. The handle 13 has a recessed part. Specifically, the handle includes a connecting post and a lifting head that are fixedly connected. The other end of the connecting post is fixedly connected to the top surface of the lid 12. The outer diameter of the connecting post is smaller than the outer diameter of the lifting head, thus forming a recessed part on the outside of the connecting post.

[0032] A hook 14 is installed between the two handles 13. The hook 14 includes an extension rod and a collar and a hook respectively fixedly installed at both ends of the extension rod. The collar is fitted onto the recess (i.e., the connecting post) of one handle 13, and the hook 14 can rotate around the handle 13 (i.e., the connecting post). The hook can be hooked onto the recess (i.e., the connecting post) of the other handle 13 to lock the two box covers 12, preventing the two box covers 12 from being forced open after the medical oxygen humidifier is pressurized and ruptured, thus ensuring the safety of the test personnel.

[0033] Because an external air source is required to pressurize the medical oxygen humidifier during leakage and pressure resistance tests (i.e., the air pipe needs to enter the housing 11 and the cover 12 from the outside), a reserved channel is provided on the cover 12 for the external air source pipe to enter the housing 11 and the cover 12. The reserved channel is a first strip-shaped through groove 121 opened on the cover 12. The first strip-shaped through groove 121 is opened on an adjacent side of the two covers 12, and the two first strip-shaped through grooves 121 are connected.

[0034] Naturally, a reserved channel can also be opened on the upper part of the side wall of the box 11 to allow the air pipe connected to the external air source to pass through. This method can be inferred from the first strip-shaped through groove 121, so it will not be described in detail.

[0035] See attached document Figure 4 The fixing component 2 includes a base 21, columns 22, fasteners 23, crossbars 24 and measuring components 25; three parallel columns 22 are fixedly installed on the top surface of the base 21 at intervals, and the number of fasteners 23 is the same as that of columns 22.

[0036] See attached document Figure 5 , 6 The fixing component 23 includes a first slider 231, a first locking knob 232, a connecting rod 233, a first clamp 234, a second clamp 235, a bolt 236, and a wing nut 238.

[0037] A through hole is provided at the center of the first slider 231. The first slider 231 is fitted onto the column 22 through the through hole and can slide along the column 22. The first locking knob 232 includes a screw and a knob head fixed to one end of the screw. A threaded hole perpendicular to and connected to the through hole is provided on the side of the first slider 231. The screw is screwed into the threaded hole, and the other end of the screw can enter the through hole. After the first slider 231 slides along the column 22 to the target height, the screw is tightened by the knob head, so that the front end of the screw abuts against the column 22, fixing the first slider 231 to the column 22.

[0038] The rear end of the first clamp 234 is fixedly installed on one side of the first slider 231 via the connecting rod 233 (a fixing plate perpendicular to the length direction of the first clamp 234 is fixedly installed at the rear end of the first clamp 234, and the fixing plate is fixedly connected to one end of the connecting rod 233). The rear ends of the first clamp 234 and the second clamp 235 are hinged (through a hinge shaft, shown in the figure). The second clamp 235 is not connected to the fixing plate. The front ends of the first clamp 234 and the second clamp 235 form a V-shaped clamping part that is arranged opposite to each other. The first clamp 234 and the second clamp 235 can rotate relative to the hinged part at the rear end, so that the V-shaped clamping part moves away from each other and moves closer to each other. When they move closer to each other, they clamp and fix the medical oxygen humidifier to be tested. A flexible pad is fixed on the inner side of the V-shaped clamping part (i.e., the surface in contact with the medical oxygen humidifier). The flexible pad plays a buffering and protective role, which can prevent the medical oxygen humidifier bottle from being pinched or damaged, and at the same time increase the friction. The flexible pad can be made of sponge, rubber pad, silicone pad, etc.

[0039] The bolt 236 has its threaded portion passing through a through hole in the middle of the first clamping body 234. The outer diameter of the bolt head portion of the bolt 236 is larger than the diameter of the through hole. The bolt 236 also has its threaded portion passing through a second strip-shaped through groove 237 in the middle of the second clamping body 235 along the length of the second clamping body 235. The wing nut 238 is threaded onto the protruding end of the bolt 236.

[0040] By tightening the wing nut 238, the second clamp 235 is driven to rotate around the hinge and move toward the first clamp 234, thereby reducing the distance between the two V-shaped clamping parts and clamping and fixing the medical oxygen humidifier located between the two V-shaped clamping parts.

[0041] Because three fixing members 23 are provided, in order to achieve synchronous lifting and lowering adjustment of the three fixing members 23 and improve work efficiency, a crossbar 24 perpendicular to the column 22 is fixedly connected between the first sliders 231 of the three fixing members 23. Furthermore, in actual use, after the three fixing members 23 are adjusted to the target height, their positions on the column 22 can be locked using only a first locking knob 232, further improving work efficiency.

[0042] When conducting the leakage test under Clause 7.4 of the standard YY / T 1610-2018 "Medical Oxygen Humidifiers for Anesthesia and Respiratory Equipment", the medical oxygen humidifier needs to be immersed in water to a depth of ≥20cm. To facilitate the measurement of the immersion depth, please refer to the appendix. Figure 2 , 3 A scale 111 is provided on the side of the housing 11 along the height direction. The scale 111 includes scale lines and corresponding scale values.

[0043] Meanwhile, in order to facilitate the measurement of the height of the top of the medical oxygen humidifier and its correspondence with the scale 111 to determine the amount of water added in the housing 11, a measuring element 25 is provided on the column 22 located in the middle.

[0044] The measuring component 25 includes a second slider 251, a second locking knob 252, a hinge seat 253, and an indicator 254. A through hole is provided in the center of the second slider 251, through which the second slider 251 is fitted onto the central column 22 and can slide along the column 22. The second locking knob 252 includes a screw and a knob head fixed to one end of the screw. A threaded hole perpendicular to and connected to the through hole is provided on the side of the second slider 251. The screw is threaded into the threaded hole, and the other end of the screw can enter the through hole. After the second slider 251 slides along the column 22 to the target height, the screw is tightened by the knob head, causing the front end of the screw to abut against the column 22, thus fixing the second slider 251 onto the column 22.

[0045] The hinge seat 253 is fixed to the side of the second slider 251, and includes two horizontally arranged fixed plates fixed at a distance from each other to the side of the second slider 251. A hinge shaft is connected between the two fixed plates. One end of the indicator 254 has a shaft hole and is hinged to the hinge shaft through the shaft hole. The indicator 254 extends horizontally and can rotate horizontally relative to the hinge shaft.

[0046] When the indicator 254 is rotated horizontally to be perpendicular to the crossbar 24, the height of the top of the medical oxygen humidifier fixed on the fixing member 23 can be positioned (i.e., when the second slider 251 is slid along the column 22 so that the lower surface of the indicator 254 contacts the top of the medical oxygen humidifier, the second slider 251 is fixed on the column 22 by the second locking knob 252). When the indicator 254 is rotated horizontally to be parallel to the crossbar 24 and facing the scale 111, the specific value of the height of the top of the medical oxygen humidifier can be measured at this time, which serves as a reference for how much water to add into the box 11 to meet the requirement of "immersion depth ≥ 20cm" in the standard.

[0047] One method of using the medical oxygen humidifier leakage and pressure resistance testing device in this patent is as follows:

[0048] When conducting a leak test on a medical oxygen humidifier: First, place the medical oxygen humidifier vertically on the base 21. Loosen the first locking knob 232 to lower the fixing member 23 to a height corresponding to the bottle of the medical oxygen humidifier. Tighten the first locking knob 232 to secure the fixing member 23. Loosen the wing nut 238 to move the V-shaped clamping parts at the front ends of the first clamp 234 and the second clamp 235 away from each other. Then, move the medical oxygen humidifier horizontally into the two V-shaped clamping parts and tighten the wing nut 238 to fix the medical oxygen humidifier between the two V-shaped clamping parts.

[0049] Rotate the indicator 254 horizontally to a position perpendicular to the crossbar 24, loosen the second locking knob 252, and slide the second slider 251 along the column 23. When the bottom surface of the indicator 254 contacts the top surface of the medical oxygen humidifier, tighten the second locking knob 252 to position the second slider 251. Then rotate the indicator 254 horizontally to a position parallel to the crossbar 24, so that the indicator 254 points to the scale 111, and directly read the scale value at this time. Water can then be added to the chamber 11, and the water depth should be equal to the read scale value plus at least 20 cm. Connect the gas inlet of the medical oxygen humidifier to the test gas supply source, close all other interfaces, close the chamber cover 12, and let the gas supply pipe pass through the first strip groove 121. Rotate the hook 14 to connect the two handles and lock the two chamber covers 12.

[0050] Pressurize the medical oxygen humidifier through the air supply source and air supply pipe (the air supply pressure is the maximum working pressure or 200kPa pressure, whichever is greater), and let it stand for 3 minutes to completely release the air adhering to the surface of the medical oxygen humidifier. Then, observe through the box 11 and the box cover 12 whether there are bubbles generated at each connection of the medical oxygen humidifier. If no bubbles are generated, the leakage test is passed; otherwise, it is failed.

[0051] When conducting the pressure resistance test of a medical oxygen humidifier: After completing the leakage test of the medical oxygen humidifier, if no bubbles are generated, the pressure resistance test can be continued. Pressurize the medical oxygen humidifier through the gas supply source and gas supply pipeline (the gas supply pressure is 2 times the maximum working pressure or 600 kPa pressure, whichever is smaller) for 1 minute. Observe the medical oxygen humidifier through the chamber 11 and the chamber cover 12 to see if there is any cracking (if there is a pressure relief device, the test should be conducted with the pressure relief device blocked). If no cracking occurs, the pressure resistance test is passed; otherwise, it is failed.

[0052] Obviously, modifications and / or additions can be made to the above-mentioned medical oxygen humidifier leakage and pressure resistance testing device and corresponding method without departing from the field and scope of this utility model.

[0053] It is equally clear that although this invention has described the medical oxygen humidifier leakage and pressure resistance testing device in detail, those skilled in the art will certainly be able to obtain many other equivalent forms of medical oxygen humidifier leakage and pressure resistance testing devices and corresponding methods, which have the features described in the claims and are therefore within the scope of protection defined herein.

Claims

1. A device for testing the leakage and pressure resistance of a medical oxygen humidifier, characterized in that: It includes a protective case assembly (1) and a fixing assembly (2); the protective case assembly (1) includes a case body (11) and a case cover (12), the case cover (12) is hinged to the top of the case body (11) and is used to close the top opening of the case body (11); the fixing assembly (2) is placed inside the case body (11); The fixing component (2) includes a base (21), a column (22) and a fixing member (23). At least one column (22) is fixedly installed on the top surface of the base (21). The fixing member (23) includes a sliding seat and a fixing clip fixedly installed on one side of the sliding seat. The sliding seat is fixedly installed on the column (22) and can slide vertically along the column (22). The fixing clip is used to fix the medical oxygen humidifier to be tested.

2. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 1, characterized in that: The sliding seat includes a first slider (231) and a first locking knob (232). A through hole is provided in the center of the first slider (231). The first slider (231) is fitted onto the column (22) through the through hole and can slide along the column (22). The fixing clamp is fixedly installed on one side of the first slider (231) through a connecting rod (233). The first locking knob (232) includes a screw and a knob head fixed to one end of the screw. A threaded hole perpendicular to and connected to the through hole is provided on the side of the first slider (231). The screw is screwed onto the threaded hole by the thread, and the other end of the screw can enter the through hole.

3. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 1, characterized in that: The fixing clamp includes a first clamp body (234), a second clamp body (235), a bolt (236), and a wing nut (238). The rear ends of the first clamp body (234) and the second clamp body (235) are hinged together. The bolt (236) passes through a through hole in the middle of the first clamp body (234) and exits through a second strip-shaped through groove (237) in the middle of the second clamp body (235) along the length direction of the second clamp body (235). The wing nut (238) is threaded onto the protruding end of the bolt (236). The front ends of the first clamp body (234) and the second clamp body (235) form opposing V-shaped clamping portions.

4. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 3, characterized in that: A flexible pad is fixed on the inner side of the V-shaped clamping part.

5. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 1, characterized in that: Multiple fasteners (23) are provided, and a crossbar (24) perpendicular to the column (22) is fixedly connected between the multiple sliding seats.

6. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 1, characterized in that: A scale (111) is provided on the side of the box (11) along the height direction.

7. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 1 or 6, characterized in that: The fixing component (2) also includes a measuring component (25), which includes a second slider (251), a second locking knob (252), a hinge seat (253), and an indicator (254). A through hole is provided in the center of the second slider (251), and the second slider (251) is fitted onto the column (22) through the through hole and can slide along the column (22). The second locking knob (252) includes a screw and a knob head fixed to one end of the screw. A threaded hole perpendicular to and connected to the through hole is provided on the side of the second slider (251), and the screw is screwed onto the threaded hole through the thread, and the other end of the screw can enter the through hole. The hinge seat (253) is fixed to the side of the second slider (251), and one end of the indicator (254) is hinged to the hinge seat (253). The indicator (254) extends horizontally and can rotate horizontally relative to the hinge seat (253).

8. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 1, characterized in that: The box body (11) and the box lid (12) are made of transparent material. There are two boxes lids (12), and they are designed to open in opposite directions. The two boxes lids (12) are hinged to the top of the box body (11) on the side away from each other. A handle (13) is fixedly installed on the top surface of the two boxes lids (12) that are close to each other. A recess is provided on the handle (13). A hook (14) is installed between the two handles (13). The hook (14) includes an extension rod and a collar and a hook respectively fixedly installed at both ends of the extension rod. The collar is fitted onto the recess of one handle (13), and the hook (14) can rotate around the handle (13). The hook can be hooked onto the recess of the other handle (13).

9. The medical oxygen humidifier leakage and pressure resistance testing device according to claim 1, characterized in that: A reserved channel is provided on the box cover (12), which is the first strip-shaped through groove (121) on the box cover (12).

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