Device for detecting hemodialysis on-line port leakage

Abstract

The utility model discloses a device for detecting hemodialysis on-line port leakage, which relates to the technical field of medical instruments and comprises a shell and a leakage detection unit, the shell is fixedly mounted on a hemodialysis machine, the side wall of the shell is arranged around the on-line port of the hemodialysis machine, the bottom edge of the shell is arranged on the lower side of the on-line port, and the leakage detection unit is arranged on the side wall of the shell. A liquid collecting groove is formed in the bottom edge of the shell, and the liquid leakage detection unit is arranged on the bottom edge of the shell. When the online port of the hemodialysis machine leaks liquid, the leaked liquid can directly drop into the liquid collecting tank on the shell and can be detected by the leaked liquid detection unit, so that the detection sensitivity is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a device for detecting the leakage of an online port of hemodialysis. Background Art

[0002] The methods of extracorporeal blood treatment include hemodialysis, hemofiltration, etc. Usually, unnecessary substances or molecules (such as blood component separation, plasma removal) are extracted from the patient's blood, and / or beneficial substances or molecules are added to the blood.

[0003] There are usually multiple liquid supply and return interfaces in the hemodialysis system connected to the extracorporeal circulation pipeline, and these connection points may be the sources of liquid leakage. At the online port of the hemodialysis system, there are two common situations of liquid leakage. One situation is during the pipeline flushing and disinfection. When the sealing function at the online port fails, the disinfection liquid flows out, which will result in incomplete disinfection at the online port and bacterial residues, thus affecting the dialysis treatment effect. Another situation is during the pipeline priming or replacement fluid replenishment. Liquid leakage occurs at the connection between the online port and the pipeline, which will also have an adverse impact on the priming effect or replenishment effect, thus affecting the dialysis treatment effect. Therefore, it is necessary to detect the liquid leakage at these connection points on the extracorporeal circulation pipeline.

[0004] The Chinese patent document with the publication number CN215780383U discloses a liquid leakage detection device for a blood purification device, which is used to detect the liquid leakage condition of the device body of the blood purification device, including: a support base, a mounting part, and a liquid leakage detector. The support base includes a receiving groove for receiving the liquid leaked from the device body. The receiving groove includes a groove bottom wall and a groove side wall connected to the groove bottom wall. A liquid collecting groove is formed at the lowest part of the receiving groove, and the liquid leakage detector is arranged in the liquid collecting groove; the mounting part is used to mount the device body and is arranged on the support base; the liquid leakage detector is used to detect the liquid leakage condition of the device body; wherein, the groove bottom wall includes a receiving surface arranged obliquely, the receiving surface extends obliquely along the first direction, the liquid leakage detector is arranged at the lowest part of the receiving groove, and the lowest part of the receiving groove is located in the middle of the receiving groove perpendicular to the first direction. The above patent can collect the leaked liquid in the receiving groove by setting the support base with the receiving groove; by setting the liquid leakage detector, it can detect whether there is liquid leakage from the device body of the blood purification device.

[0005] However, when the above-mentioned patented technology detects liquid leakage, there is a molecular attraction between the water molecules of the liquid leakage and the receiving surface, which will generate frictional force, resulting in the possibility that the liquid leakage may stay on the receiving surface and cannot be detected by the liquid leakage detector in the liquid collecting tank. Moreover, the liquid leakage needs to flow in the receiving tank for a period of time before it can flow into the liquid collecting tank and be detected by the liquid leakage detector. Therefore, the detection sensitivity of the liquid leakage of this patented technology is low. Secondly, there will also be a certain amount of liquid leakage during normal operation, such as the liquid brought out when pulling out the tube. Once the liquid leakage detector of this patent detects the liquid, it will alarm, which is prone to false alarms. Thirdly, the cross-section of the receiving tank of this patent is U-shaped, so at least two sides are prone to crystallization and are not easy to clean. In addition, the liquid leakage in the above-mentioned patent is in direct contact with the liquid leakage detector. After working for a period of time, crystals are likely to form on the surface of the liquid leakage detector, which may affect the detection accuracy. Utility Model Content

[0006] The purpose of the present utility model is to provide a device for detecting the leakage of the online port of hemodialysis. The liquid leakage directly enters the liquid collecting tank, greatly improving the detection sensitivity.

[0007] To achieve the above purpose, the present utility model adopts the following technical solution: A device for detecting the leakage of the online port of hemodialysis includes a housing and a liquid leakage detection unit. The housing is fixedly installed on the hemodialysis machine, and the side wall of the housing is arranged around the online port of the hemodialysis machine. The bottom edge of the housing is arranged on the lower side of the online port. A liquid collecting tank is opened on the bottom edge of the housing. The liquid leakage detection unit includes a liquid leakage sensor and a fixing member. The fixing member is fixedly installed on the bottom edge of the housing, and the liquid leakage sensor is fixedly installed on the fixing member and abuts against the side wall of the housing bottom edge far away from the online port.

[0008] The technical principle of the present utility model is as follows: When liquid leakage occurs at the online port of the hemodialysis machine, the liquid leakage will directly drip into the liquid collecting tank on the housing, that is, it will be detected by the liquid leakage detection unit, greatly improving the detection sensitivity.

[0009] Further, the cross-section of the liquid collecting tank is V-shaped, and the connection at the bottom of the V-shaped liquid collecting tank is set to be arc-shaped.

[0010] Further, the volume of the liquid collecting tank is 3 ml - 5 ml, and the alarm liquid level is greater than or equal to 30% of the volume of the liquid collecting tank.

[0011] Further, the angle between the liquid outflow surface of the liquid collecting tank in the front-back direction and the horizontal plane is 20° - 26°.

[0012] Further, the angle between the liquid outflow surface of the liquid collecting tank in the left-right direction and the horizontal plane is 2° - 4°.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The liquid leakage generated at the online port will directly drip into the liquid collection tank, that is, it will be detected by the liquid leakage unit, which can greatly improve the detection sensitivity. Moreover, the liquid leakage detection unit is arranged outside the liquid collection tank, which can avoid the crystallization of the liquid leakage from affecting the accuracy of the liquid leakage detection unit.

[0015] 2. For the traditional liquid collection tank with a U-shaped cross-section, at least two sides are prone to crystallization. By setting the liquid collection tank in a V shape, only one arc-shaped side at the bottom of the V shape is relatively prone to crystallization, which is convenient for cleaning.

[0016] 3. When the volume of the liquid collection tank is small and the alarm liquid level is greater than or equal to 30% of the volume of the liquid collection tank, it can not only reduce false alarms for the outflowing liquid during normal operation, but also detect leaks faster and send out warning signals, greatly reducing the impact on the treatment effect caused by leaks. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a cross-sectional view of the present utility model.

[0019] In the above drawings:

[0020] 1. Online port; 2. Housing; 201. Liquid collection tank;

[0021] 3. Liquid leakage detection unit; 301. Liquid leakage sensor; 302. Fixing member. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; the structures described in various embodiments can be freely combined without conflict in terms of structure or principle.

[0023] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0025] The following describes some embodiments of the present utility model with reference to the drawings:

[0026] As Figure 1 and Figure 2 shown, the present utility model provides a device for detecting leakage of the online port 1 of hemodialysis, including a housing 2 and a leakage detection unit 3. The housing 2 is fixedly installed on the hemodialysis machine, and the side wall of the housing 2 is arranged around the online port 1 of the hemodialysis machine. The bottom edge of the housing 2 is arranged on the lower side of the online port 1. A liquid collecting groove 201 is formed in the bottom edge of the housing 2. The leakage detection unit 3 includes a leakage sensor 301 and a fixing member 302. The fixing member 302 is fixedly installed on the bottom edge of the housing 2, and the leakage sensor 301 is fixedly installed on the fixing member 302 and abuts against the side wall of the housing 2 on the side away from the online port 1 at the bottom edge.

[0027] The side wall of the housing 2 around the online port 1 of the hemodialysis machine can be in a U shape or a square shape. For the convenience of operation of the staff, it is preferably in a U shape here. When the online port 1 of the hemodialysis machine leaks, the leaked liquid will directly drip into the liquid collecting groove 201 on the housing 2, that is, it will be detected by the leakage detection unit 3, greatly improving the detection sensitivity. Moreover, the leakage detection unit 3 is arranged outside the liquid collecting groove 201, which can avoid the crystallization of the leaked liquid from affecting the accuracy of the leakage detection unit 3.

[0028] The leakage sensor 301 adopts a capacitive non-contact detection principle and is placed on the back of one side or both sides of the liquid collecting groove 201. Since the leakage sensor 301 is arranged outside the accommodating volume of the liquid collecting groove 201, this detection method avoids the direct contact between the leakage sensor 301 and the liquid, thus being able to avoid the problems that the surface of the leakage sensor 301 is prone to crystallization and being covered by other foreign objects, which will affect the detection accuracy.

[0029] Furthermore, as Figure 1 and Figure 2 shown, the cross-section of the liquid collecting groove 201 is V-shaped, and the bottom connection of the V-shaped liquid collecting groove 201 is set to be arc-shaped.

[0030] The detection surface of the liquid leakage sensor 301 is a flat surface, which is attached to the back side of the side surface of the V-shaped liquid collection tank 201. When the liquid in the liquid collection tank 201 covers a certain area of the detection surface of the leakage sensor, the alarm setting of the leakage sensor will be triggered. Through the V-shaped setting, only the bottom arc edge is more likely to crystallize, which is convenient for subsequent cleaning.

[0031] Further, as Figure 1 and Figure 2 shown, the volume of the liquid collection tank 201 is 3 ml - 5 ml, and the alarm liquid level is greater than or equal to 30% of the volume of the liquid collection tank 201.

[0032] According to the actual use situation at the online port 1, the alarm liquid volume is set to 30% or more of the volume of the liquid collection tank 201. This design can not only reduce false alarms for the outflowing liquid (such as the liquid carried out when pulling out the tube) during normal operation, but also the low-volume design can detect leakage faster and send out alarm signals, improving the detection sensitivity, thereby greatly reducing the impact on the treatment effect caused by leakage.

[0033] Further, as Figure 1 the included angle between the liquid outflow surface of the liquid collection tank 201 in the front-back direction and the horizontal plane is 20° - 26°.

[0034] When the included angle is too small, the liquid is easy to flow out and not conducive to liquid collection; when the included angle is too large, on the one hand, it is not convenient for the liquid to form a large detection coverage area in the horizontal direction, and on the other hand, it is not convenient to quickly drain the liquid during cleaning; here, it is preferably set the included angle to 23°.

[0035] Further, as Figure 1 shown, the included angle between the liquid outflow surface of the liquid collection tank 201 in the left-right direction and the horizontal plane is 2° - 4°.

[0036] When the included angle is too small, the liquid is not easy to flow and collect in the left-right direction, which is not conducive to quickly forming a large detection coverage area of the liquid; when the included angle is too large, the liquid is easily collected and flows out at one end in the left-right direction under the action of gravity, which is not conducive to collecting a large volume of liquid to form a large detection coverage area; here, it is preferably set the included angle to 3°. The V-shaped liquid collection tank 201 forms a certain included angle with the horizontal plane in the left-right direction. When the liquid flows into the liquid collection tank 201, it will first collect at the lower end under the action of gravity. To reduce false alarms for the outflowing liquid at the online port 1 during normal operation, the detection surface of the liquid leakage sensor 301 is set at a certain distance from the lower ends of the liquid collection tank 201 in the left-right direction. When the outflowing liquid is less, the liquid detection coverage area is 0 or small and will not trigger an alarm. As the outflowing liquid increases, the detection coverage area also increases until an alarm is triggered.

Claims

1. A device for detecting leakage of a hemodialysis online port, characterized in that: The invention comprises a housing (2) and a liquid leakage detection unit (3), wherein the housing (2) is fixedly mounted on a hemodialysis machine, and the side wall of the housing (2) is arranged around an online port (1) of the hemodialysis machine, the bottom edge of the housing (2) is arranged on the lower side of the online port (1), and a liquid collecting groove (201) is provided on the bottom edge of the housing (2); the liquid leakage detection unit (3) comprises a liquid leakage sensor (301) and a fixing member (302), the fixing member (302) is fixedly mounted on the bottom edge of the housing (2), the liquid leakage sensor (301) is fixedly mounted on the fixing member (302), and the liquid leakage sensor (301) abuts against the side wall of the bottom edge of the housing (2) away from the online port (1).

2. A device for detecting leakage of a hemodialysis online port according to claim 1, characterized in that: The cross section of the liquid collecting trough (201) is V-shaped, and the bottom connection of the V-shaped liquid collecting trough (201) is arranged in an arc shape.

3. A device for detecting leakage of a hemodialysis online port according to claim 1 or 2, characterized in that: The volume of the liquid collecting tank (201) is 3ml-5ml, and the alarm liquid level is greater than or equal to 30% of the volume of the liquid collecting tank (201).

4. A device for detecting leakage of a hemodialysis online port according to claim 1 or 2, characterized in that: The angle between the liquid outflow surface of the liquid collecting tank (201) in the front and rear directions and the horizontal plane is 20° to 26°.

5. The device for detecting leakage of a hemodialysis online port according to claim 3, characterized in that: The angle between the liquid outflow surface of the liquid collecting tank (201) in the front and rear directions and the horizontal plane is 20° to 26°.

6. A device for detecting leakage of a hemodialysis online port according to claim 1 or 2, characterized in that: The angle between the liquid outflow surface of the liquid collecting tank (201) in the left and right directions and the horizontal plane is 2° to 4°.

7. The device for detecting leakage of a hemodialysis online port according to claim 3, characterized in that: The angle between the liquid outflow surface of the liquid collecting tank (201) in the left and right directions and the horizontal plane is 2° to 4°.

8. The device for detecting leakage of a hemodialysis online port according to claim 4, characterized in that: The angle between the liquid outflow surface of the liquid collecting tank (201) in the left and right directions and the horizontal plane is 2° to 4°.

9. The device for detecting leakage of a hemodialysis online port according to claim 5, characterized in that: The angle between the liquid outflow surface of the liquid collecting tank (201) in the left and right directions and the horizontal plane is 2° to 4°.

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