Air tightness detection equipment for hemodialysis pipeline

Abstract

The invention discloses air tightness detection equipment for a hemodialysis pipeline, and belongs to the technical field of hemodialysis pipelines, the air tightness detection equipment for the hemodialysis pipeline comprises a glass box, a base fixed at the bottom of the glass box, a liquid outlet with a valve arranged at the central position of the bottom of the glass box, and a liquid supplementing pipe with a valve fixed on the side surface of the glass box, four supporting columns are installed at the bottom of the glass box, a glass inserting pipe is fixedly installed in the middle of the glass box, the two ends of the glass inserting pipe extend to the outer portion of the side face of the glass box and are in threaded connection with sealing plugs, and the rest part of the glass inserting pipe is located in the glass box. A plurality of through holes are formed in the side face, located in the glass box, of the glass inserting pipe, and an arc-shaped support is placed in the glass inserting pipe. The detection mode of the device does not damage the hemodialysis pipeline, the observation method is diversified, the operation is simple, the observation is convenient, the probability of negligence in the manual observation process is reduced, and the detection effect of the air tightness of the hemodialysis pipeline is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hemodialysis tubing, and more particularly to an airtightness detection device for hemodialysis tubing. Background Art

[0002] Before the hemodialysis tubing, an airtightness detection device is required to perform airtightness detection on the tubing connected to the blood pump of the dialysis machine and the tubing required for the hemodialysis tubing. Then, the blood pump of the dialysis machine is started, and the air in the dialysis tubing and the blood chamber of the dialyzer is first drained with physiological saline. The flow direction of the physiological saline is from the arterial end to the dialyzer and then to the venous end, and reverse priming is not allowed. Traditional airtightness detection devices usually use air pressure to test the tightness of the tubing material and its joints under conditions similar to gas transmission.

[0003] Publication No. CN218674135U discloses a new airtightness detection device for hemodialysis tubing, including a detection device body. A supply mechanism is fixedly installed on one side of the detection device body. A detection mechanism is provided inside the detection device body. The detection mechanism includes a funnel, a delivery hose, a micropump, a suction hose, a suction table, a supply hose, and a pipe joint. A micropump is fixedly installed at the top of the suction table. The water inlet of the micropump is fixedly connected to the suction hose. The water outlet of the micropump is fixedly connected to the delivery hose. The end of the delivery hose away from the micropump is fixedly connected to the funnel. The bottom end of the funnel is fixedly connected to a supply hose extending to the outside. A pipe joint is fixedly installed at the end of the supply hose away from the funnel. Several clamping mechanisms are slidably connected to the middle of the supply hose. After the micropump is powered on and started, the micropump sucks the saline stored in the saline tank through the suction hose. The sucked saline is delivered to the funnel through the delivery hose. The liquid in the funnel is delivered to the catheter of the hemodialysis tubing connected to the pipe joint along the supply hose under the action of its own gravity. When the physiological saline does not drop in the funnel for a continuous period of time, it indicates that the airtightness of the catheter of the hemodialysis tubing is good.

[0004] However, the observation method for detecting the airtightness of the catheter of the hemodialysis tubing is relatively single, and it is easy to be negligent during the manual observation process, which will affect the detection effect of the airtightness of the catheter of the hemodialysis tubing.

[0005] Therefore, in view of this, the existing structure is studied and improved to provide an airtightness detection device for hemodialysis tubing, in order to achieve a more practical value. Summary of the Invention

[0006] 1. Technical Problems to be Solved

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide an airtightness detection device for hemodialysis tubing. The detection method of this device will not damage the hemodialysis tubing, and the observation methods are relatively diverse. Its operation is simple and convenient for observation, reducing the probability of negligence that is likely to occur in the process of manual observation and improving the detection effect of the airtightness of the hemodialysis tubing.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] An airtightness detection device for hemodialysis tubing, including a glass box, a base fixed at the bottom of the glass box, a liquid discharge port with a valve provided at the center of the bottom of the glass box, a liquid replenishing tube with a valve fixed on the side of the glass box. Four support columns are installed at the bottom of the glass box. A glass insertion tube is fixedly installed in the middle of the glass box. Both ends of the glass insertion tube extend to the outside of the side of the glass box and are threadedly connected with sealing plugs. The rest of the glass insertion tube is located inside the glass box, and a number of through holes are provided on the side of the glass insertion tube located inside the glass box. An arc-shaped bracket is placed inside the glass insertion tube;

[0011] The top of the glass box is snap-connected with a top cover. Four electric telescopic rods are fixedly installed between the sides of the base and the top cover. A gas exhaust port with a valve, a pressure sensor, and a medicine funnel with a valve are fixedly installed at the top of the top cover. A probe is provided at the bottom of the pressure sensor.

[0012] Further, an upper limit scale line and a lower limit scale line are provided in the upper middle part of the side of the glass box, and the upper limit scale line and the lower limit scale line are arranged in parallel.

[0013] Further, the bottom of the glass box is of a funnel-shaped structure, and one end of the liquid discharge port with a valve is located at the position of the funnel tube.

[0014] Further, the sealing plug is composed of an outer sleeve and an inner piston, and the outer sleeve and the inner piston are integrally formed. An internal thread is provided on the inner side of the outer sleeve, and external threads matching the internal thread are provided at both ends of the glass insertion tube;

[0015] The cross-sectional diameter of the inner piston is equal to the inner diameter of the glass insertion tube.

[0016] Further, a wing plate is fixed at one end of the outer side of the outer sleeve, and a rotation mark is provided at the end of the outer sleeve away from the glass insertion tube.

[0017] Further, twelve through holes are in a group, and the through holes in a group are evenly distributed in a circularly radiating shape. The number of groups of through holes on the glass insertion tube is not less than twelve groups.

[0018] Further, a sealing strip is fixedly installed on the inner side of the top cover.

[0019] Further, the top cover is an inverted funnel-shaped structure, and one end of the exhaust port with a valve is located at the position of the funnel tube;

[0020] The bottom ends of the exhaust port with a valve, the probe, and the reagent funnel with a valve all pass through the top cover and extend to the bottom of the top cover. The exhaust port with a valve is located at the center of the top cover, and the air pressure sensor and the reagent funnel with a valve are respectively located on both sides of the exhaust port with a valve.

[0021] Further, the liquid injected into the glass box through the liquid replenishing pipe with a valve is glycerol.

[0022] Further, the liquid injected into the glass box through the liquid replenishing pipe with a valve is water, and the reagent injected into the glass box through the reagent funnel with a valve is litmus reagent.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the advantages of the present invention are as follows:

[0025] In this solution, the hemodialysis pipeline to be detected is filled with carbon dioxide. Carbon dioxide is a common gas and will not damage the hemodialysis pipeline after the detection. Then, the hemodialysis pipeline is placed into the glass insertion tube, and a certain amount of liquid is injected into the glass box. By observing whether there are bubbles inside the glass box, whether the pressure value detected by the air pressure sensor changes, whether the gas sampled from the exhaust port of the detection valve is high-concentration carbon dioxide, and whether there are obvious color changes in the liquid inside the glass box and other detection methods, it is determined whether the airtightness of the hemodialysis pipeline to be detected is good. The detection method of this device is relatively diverse, its operation is simple, it is convenient to observe, the probability of negligence easily occurring in the process of manual observation is reduced, and the detection effect of the airtightness of the hemodialysis pipeline is improved.

[0026] The above relevant description of the invention content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then can be implemented according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features, and advantages of this application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings are only used to illustrate the principles, implementation manners, applications, features, and effects of the specific implementation manners and other related contents of this application, and should not be considered as a limitation to this application.

[0028] In the accompanying drawings of the specification:

[0029] Figure 1 Schematic diagram of the three-dimensional structure of the airtightness detection device for hemodialysis tubing in the present invention Figure 1 ;

[0030] Figure 2 Schematic diagram of the three-dimensional structure of the airtightness detection device for hemodialysis tubing in the present invention Figure 2 ;

[0031] Figure 3 Schematic diagram of the planar structure of the airtightness detection device for hemodialysis tubing in the present invention;

[0032] Figure 4 Schematic diagram of the three-dimensional structure of the top cover in the present invention;

[0033] Figure 5 Schematic diagram of the three-dimensional structure of the glass insertion tube in the present invention;

[0034] Figure 6 Schematic diagram of the cross-sectional structure of the sealing plug in the present invention.

[0035] The reference numerals involved in the above-mentioned drawings are explained as follows:

[0036] 1. Glass box; 101. Base; 102. Drainage port with valve; 103. Liquid replenishing tube with valve; 104. Upper limit marking line; 105. Lower limit marking line;

[0037] 2. Support column;

[0038] 3. Glass insertion tube;

[0039] 301. Sealing plug; 3011. Outer sleeve; 3012. Inner piston; 3013. Wing plate; 3014. Rotating mark;

[0040] 302. Through hole; 303. Arc-shaped bracket;

[0041] 4. Top cover; 401. Sealing rubber strip;

[0042] 5. Electric telescopic rod;

[0043] 6. Exhaust port with valve;

[0044] 7. Pressure sensor; 701. Probe;

[0045] 8. Medicine funnel with valve. Detailed implementation manners

[0046] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable objectives and effects of this application, the following will be described in detail with reference to the specific examples listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, and thus are only examples and cannot be used to limit the protection scope of this application.

[0047] Reference to "embodiment" in this document means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it particularly limited to the independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0048] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those generally understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0049] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this document generally represents an "or" logical relationship between the associated objects before and after.

[0050] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary, or order relationship between these entities or operations.

[0051] Without more limitations, in this application, the open-ended expressions such as "including", "comprising", "having" or other similar expressions used in the statements are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be additional elements in the process, method or product including the said elements, so that the process, method or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to this process, method or product.

[0052] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood as not including the present number; expressions such as "above", "below", "within", etc. are understood as including the present number. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise specifically limited.

[0053] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiment of this application or facilitating the understanding of the reader, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, so it cannot be understood as a limitation to the embodiments of this application.

[0054] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be directly connected or indirectly connected through an intermediate medium; it can be the relationship of two components being combined together, or the interaction relationship of two components, or the communication inside two structures. For those skilled in the art to which this application belongs, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0055] Embodiment 1:

[0056] Please refer to Figure 1 - Figure 6 , an airtightness detection device for hemodialysis tubing, including a glass box 1. The air-permeable structure of the glass box 1 can facilitate observing the liquid level inside it and whether bubbles are generated in the liquid.

[0057] A base 101 fixed to the bottom of the glass box 1, and a liquid discharge port 102 with a valve provided at the center of the bottom of the glass box 1. When the valve in the liquid discharge port 102 with a valve is opened, it can facilitate discharging the liquid in the glass box 1.

[0058] A liquid replenishing pipe 103 with a valve fixed to the side of the glass box 1, which is convenient for replenishing the inside of the glass box 1 with liquid.

[0059] Four support columns 2 are installed at the bottom of the glass box 1 to facilitate raising the height of the glass box 1 and cooperate with the liquid discharge port 102 with a valve to facilitate the discharge of the liquid in the glass box 1.

[0060] A glass insertion tube 3 is fixedly installed in the middle of the glass box 1. Both ends of the glass insertion tube 3 extend to the outside of the side of the glass box 1 and are threadedly connected with sealing plugs 301. The rest of the glass insertion tube 3 is located inside the glass box 1, and a number of through holes 302 are provided on the side of the glass insertion tube 3 located inside the glass box 1. An arc-shaped bracket 303 is placed inside the glass insertion tube 3;

[0061] The inside of the hemodialysis pipeline to be tested is filled with carbon dioxide gas, and both ends of the hemodialysis pipeline to be tested are sealed. Then, the hemodialysis pipeline to be tested is placed on the arc-shaped bracket 303, and then the arc-shaped bracket 303 is pushed into the glass insertion tube 3, which can facilitate the relatively uniform distribution of the hemodialysis pipeline to be tested inside the glass insertion tube 3. At this time, the two ends of the glass insertion tube 3 are sealed with the sealing plugs 301. If the airtightness of the hemodialysis pipeline is insufficient, bubbles will be generated inside the glass box 1 and the air pressure value will change.

[0062] The top cover 4 is snap-connected to the top of the glass box 1. Four electric telescopic rods 5 are fixedly installed between the side of the base 101 and the top cover 4. The height of the top cover 4 can be controlled by using the electric telescopic rods 5. When the top cover 4 is snap-connected to the top of the glass box 1 and all valves are closed, the inside of the glass box 1 is in a completely sealed state.

[0063] An exhaust port 6 with a valve, a pressure sensor 7, and a medicine funnel 8 with a valve are fixedly installed at the top of the top cover 4. A probe 701 is provided at the bottom of the pressure sensor 7.

[0064] When the airtightness of the hemodialysis pipeline to be tested is insufficient, better gas is generated inside the glass box 1. The pressure sensor 7 cooperates with the probe 701 to detect the air pressure change. The exhaust port 6 with a valve can be used for gas sampling to determine whether it is carbon dioxide. And after the airtightness detection is completed, the exhaust port 6 with a valve can be fully opened to balance the internal and external air pressures of the glass box 1, facilitating the complete discharge of the liquid inside the glass box 1. The medicine funnel 8 with a valve can choose whether to add an indicating agent according to the actual detection situation.

[0065] Refer to Figure 1 、 Figure 2 、 Figure 3 Specifically, an upper limit scale line 104 and a lower limit scale line 105 are provided on the upper middle part of the side of the glass box 1, and the upper limit scale line 104 and the lower limit scale line 105 are arranged in parallel.

[0066] When performing the airtightness detection, liquid is injected into the glass box 1, and the liquid level is between the upper limit marking line 104 and the lower limit marking line 105. By directly observing the position of the liquid, it is convenient to visually judge whether the injected liquid volume is appropriate.

[0067] Refer to Figure 1 、 Figure 3 , specifically, the bottom of the glass box 1 is a funnel-shaped structure, and one end of the liquid discharge port 102 with a valve is located at the position of the funnel tube.

[0068] Using the funnel-shaped structure, when discharging the liquid inside the glass box 1, it is possible to avoid liquid remaining inside the glass box 1 as much as possible.

[0069] Refer to Figure 1 、 Figure 5 、 Figure 6 , specifically, the sealing plug 301 is composed of an outer sleeve 3011 and an inner piston 3012. The outer sleeve 3011 and the inner piston 3012 are integrally formed. Internal threads are provided on the inner side of the outer sleeve 3011, and external threads matching the internal threads are provided at both ends of the glass insertion tube 3;

[0070] The cross-sectional diameter of the inner piston 3012 is equal to the inner diameter of the glass insertion tube 3.

[0071] The outer sleeve 3011 is screwed in along the reverse direction of the thread. At this time, the inner piston 3012 is screwed in synchronously. After the sealing plug 301 is completely screwed in, the airtightness of the glass insertion tube 3 is ensured at this time.

[0072] Specifically, one end of the outer side of the outer sleeve 3011 is fixed with a wing plate 3013, and a rotation mark 3014 is provided at the end of the outer sleeve 3011 away from the glass insertion tube 3.

[0073] Through the wing plate 3013, the convenience of rotating the outer sleeve 3011 is improved. Through the rotation mark 3014, it is convenient for the user to quickly identify the tightening direction of the outer sleeve 3011.

[0074] Specifically, twelve through holes 302 are in a group, and the through holes 302 in a group are evenly distributed in a circularly radiating shape. The number of groups of through holes 302 on the glass insertion tube 3 is not less than twelve groups.

[0075] If the airtightness of the hemodialysis pipeline to be detected is insufficient, it is convenient for the leaked gas to be discharged from the through holes 302, ensuring the accuracy of the airtightness detection of the hemodialysis pipeline to be detected;

[0076] At the same time, the liquid can also freely pass through the through holes 302. When the inside of the glass insertion tube 3 where the hemodialysis pipeline to be detected is located is filled with liquid, a more obvious pressure difference will be formed between the gas inside the hemodialysis pipeline to be detected and the external liquid. When the hemodialysis pipeline to be detected, the effect of bubble emergence is more obvious.

[0077] Refer to Figure 1 、 Figure 4 Specifically, a sealing strip 401 is fixedly installed inside the top cover 4.

[0078] When the top cover 4 is engaged with the glass box 1, the sealing strip 401 is used to further enhance the sealing performance of the glass box 1.

[0079] Refer to Figure 1 、 Figure 3 Specifically, the top cover 4 is an inverted funnel-shaped structure, and one end of the exhaust port 6 with a valve is located at the position of the funnel tube;

[0080] Taking advantage of the property of gas floating, it is convenient to completely exhaust the gas inside the glass box 1.

[0081] The bottom ends of the exhaust port 6 with a valve, the probe 701, and the reagent funnel 8 with a valve all pass through the top cover 4 and extend to the bottom of the top cover 4. The exhaust port 6 with a valve is located at the center of the top cover 4, and the pressure sensor 7 and the reagent funnel 8 with a valve are respectively located on both sides of the exhaust port 6 with a valve.

[0082] Working principle:

[0083] When performing the airtightness detection of the hemodialysis pipeline to be detected, first fill the inside of the hemodialysis pipeline to be detected with carbon dioxide gas, and seal both ends of the hemodialysis pipeline to be detected. Then, place the hemodialysis pipeline to be detected on the arc-shaped bracket 303, and then push the arc-shaped bracket 303 into the glass insertion tube 3;

[0084] Then inject liquid through the liquid supplement pipe 103 with a valve to make the liquid level inside the glass box 1 between the upper limit scale line 104 and the lower limit scale line 105. At this time, observe the situation inside the glass box 1. If one or more of the above situations occur, it is determined that the airtightness of the hemodialysis pipeline to be detected is insufficient:

[0085] ① Bubbles appear inside the glass box 1;

[0086] ② The pressure value detected by the pressure sensor 7 changes;

[0087] ③ The gas sampled from the exhaust port 6 with a valve is high-concentration carbon dioxide;

[0088] ④ The liquid inside the glass box 1 shows an obvious color change.

[0089] In other cases, it should be determined that the airtightness of the hemodialysis pipeline to be detected meets the requirements.

[0090] In this way, the use of the entire device can be completed.

[0091] Embodiment 2:

[0092] Based on the above-mentioned Embodiment 1, a further description is made.

[0093] Refer to Figure 1 、 Figure 2 、 Figure 3 Specifically, the liquid injected into the glass box 1 through the liquid supplement pipe 103 with a valve is glycerol.

[0094] Glycerol is non-toxic and not volatile. At the same time, carbon dioxide is insoluble in glycerol. In this way, carbon dioxide can be completely above the glycerol. At this time, the medicine funnel 8 with a valve is not used and the valve is closed. The airtightness of the hemodialysis pipeline to be detected is determined by observing the bubbles and the internal air pressure of the glass box 1.

[0095] At the same time, since carbon dioxide is insoluble in glycerol, it is not necessary to frequently replace the glycerol solution, which improves the utilization rate of the glycerol solution and reduces the detection cost.

[0096] Embodiment 3:

[0097] Based on the above-mentioned Embodiment 1, a further description is made.

[0098] Refer to Figure 1 、 Figure 2 、 Figure 3 Specifically, the liquid injected into the glass box 1 through the liquid supplement pipe 103 with a valve is water, and the medicine injected into the glass box 1 through the medicine funnel 8 with a valve is litmus reagent.

[0099] Carbon dioxide dissolves in water and is acidic. At this time, the dropped litmus reagent can react with the acidity and show a color change, which improves the convenience of visually observing the airtightness of the hemodialysis pipeline to be detected.

[0100] It should be noted that although the above-mentioned embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made using the content of the specification and drawings of the present invention, and directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. An air tightness detection device for a hemodialysis pipeline, comprising a glass box (1), a base (101) fixed to the bottom of the glass box (1), a liquid discharge port (102) with a valve arranged at the center of the bottom of the glass box (1), and a liquid infusion tube (103) with a valve fixed to the side of the glass box (1), characterized in that: Four support columns (2) are installed at the bottom of the glass box (1); a glass insertion tube (3) is fixedly installed in the middle of the glass box (1); both ends of the glass insertion tube (3) extend to the outside of the side of the glass box (1) and are threadedly connected with sealing plugs (301); the rest of the glass insertion tube (3) is located inside the glass box (1); a plurality of through holes (302) are opened on the side of the glass insertion tube (3) located inside the glass box (1); and an arc-shaped bracket (303) is placed inside the glass insertion tube (3); The top of the glass box (1) is snap-connected with a top cover (4), four electric telescopic rods (5) are fixedly installed between the base (101) and the side of the top cover (4), an exhaust port (6) with a valve, an air pressure sensor (7), and a medicine funnel (8) with a valve are fixedly installed at the top of the top cover (4), and a probe (701) is arranged at the bottom of the air pressure sensor (7).

2. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: An upper limit marking line (104) and a lower limit marking line (105) are arranged at the middle and upper part of the side surface of the glass box (1), and the upper limit marking line (104) and the lower limit marking line (105) are arranged in parallel.

3. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: The bottom of the glass box (1) is a funnel-shaped structure, and one end of the liquid discharge port (102) with a valve is located at the position of the funnel tube.

4. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: The sealing plug (301) is composed of an outer sleeve (3011) and an inner piston (3012), the outer sleeve (3011) and the inner piston (3012) are integrally formed, the inner side of the outer sleeve (3011) is provided with an internal thread, and both ends of the glass insertion tube (3) are provided with external threads matching the internal threads; The cross-sectional diameter of the inner piston (3012) is equal to the inner diameter of the glass insertion tube (3).

5. The air tightness detection device for hemodialysis pipeline according to claim 4, characterized in that: A wing plate (3013) is fixed to one end of the outer side surface of the outer sleeve (3011), and a rotation mark (3014) is provided at one end of the outer sleeve (3011) away from the glass insertion tube (3).

6. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: Twelve through holes (302) form a group, and the through holes (302) in a group are evenly distributed in a ring-shaped radial shape. The number of groups of through holes (302) on the glass interpenetrating tube (3) is not less than twelve groups.

7. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: A sealing strip (401) is fixedly mounted on the inner side of the top cover (4).

8. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: The top cover (4) is an inverted funnel-shaped structure, and one end of the exhaust port (6) with a valve is located at the position of the funnel tube; The bottom ends of the exhaust port with a valve (6), the probe (701), and the medicine funnel with a valve (8) all pass through the top cover (4) and extend to the bottom of the top cover (4); the exhaust port with a valve (6) is located at the center of the top cover (4); and the air pressure sensor (7) and the medicine funnel with a valve (8) are respectively located on both sides of the exhaust port with a valve (6).

9. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: The liquid injected into the glass box (1) through the liquid infusion tube (103) with a valve is glycerol.

10. The air tightness detection device for hemodialysis pipeline according to claim 1, characterized in that: The liquid injected into the glass box (1) through the liquid infusion tube (103) with a valve is water, and the medicine injected into the glass box (1) through the medicine funnel (8) with a valve is litmus reagent.

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