Online detection device for positive pressure of dialysis tube air kettle

Abstract

The utility model provides a dialysis tube air kettle positive pressure on-line detection device, which solves the problems of scrapping, waste, low efficiency and the like existing in a traditional bubble method, remarkably improves the product quality control level, the production efficiency and the safety, and comprises at least one group of positioning jacking components, at least one group of positioning jacking components, at least one group of positioning jacking components and at least one group of positioning jacking components, comprising a position sensor and a jacking driving part, the position sensor is used for identifying the air kettle reaching the detection station, and the jacking driving part is used for lifting the identified air kettle away from the conveying line to a preset detection height; the sealing butt joint assembly comprises a linear driver arranged in the lateral direction of the detection hole site and a sealing joint connected to the execution end of the linear driver, and the linear driver is used for driving the sealing joint to move in the horizontal direction so as to be inserted into a side wall interface of the lifted air kettle; the air pressure detection assembly is connected with the sealing connector through a pipeline, and the controller is in signal connection with the air pressure detection assembly, the position sensor, the jacking driving piece and the linear driver.

Description

Technical Field

[0001] This utility model relates to the field of air bottle testing, and more specifically, to an online positive pressure testing device for dialysis tubing air bottles. Background Technology

[0002] In renal replacement therapy for patients with acute and chronic renal failure, the dialyzer, as the core extracorporeal circulation device, must work precisely with the dialysis tubing, dialysate, and dialysis machine to replace the excretory function of the kidneys. The dialysis tubing establishes vascular access outside the body, and its safety and reliability directly affect the patient's life and health. Among these components, the air vent is a key part of the extracorporeal circulation system, playing a crucial role in venting air and safety monitoring.

[0003] During treatment, the dialysis tubing system, especially the air reservoir and its connections, requires extremely tight sealing. If the sealing is not up to standard, even a tiny leak can easily occur, leading to blood or dialysate leakage during treatment. This not only severely impacts treatment effectiveness and causes incomplete dialysis, but can also lead to serious infections, blood loss, and even life-threatening accidents. Therefore, rigorous airtightness testing of the air reservoir before production or use is an essential step to ensure patient safety and treatment effectiveness.

[0004] The traditional positive pressure testing method commonly used in the industry is the bubble detection method. Its specific operating procedure is as follows: A sample air tank is extracted from a batch of products, and its air tube interface is sealed using solvents such as cyclohexanone; compressed air with adjusted pressure is introduced into the sealed air tank; then the entire product is completely submerged in a water tank; the testing personnel visually observe whether bubbles are continuously generated in the water to determine if there is a leak. If a leak is found, the product is considered defective.

[0005] However, this traditional detection method has many significant drawbacks, such as:

[0006] 1. The product must be immersed in water for testing. After the test, it can no longer be used due to water immersion and adhesive contamination, and must be scrapped, resulting in a huge waste of materials and energy.

[0007] 2. After each product is immersed in water, it is necessary to wait for the water surface to be completely calm before observing the bubbles. The detection cycle is long and the efficiency is low, which is difficult to meet the online detection needs of current large-scale production lines.

[0008] 3. Because it is a destructive test and inefficient, this method can usually only be used for random sampling. Random sampling means there is a risk of missed detection. If defective products that are not detected are used in clinical settings, they will pose a huge safety hazard and cannot achieve full inspection.

[0009] 4. The test results rely entirely on the operator's visual observation and subjective judgment, which are easily affected by factors such as fatigue, lighting, and viewing angle, and there is a risk of misjudgment or missed judgment.

[0010] 5. Using solvents such as cyclohexanone for bonding raises environmental concerns such as solvent evaporation, operator health protection, and subsequent waste disposal. Utility Model Content

[0011] The purpose of this invention is to provide a highly efficient, accurate, non-destructive, and fully automated online device for detecting the positive pressure seal of dialysis tubing air containers. This fundamentally solves the problems of waste, low efficiency, inability to perform full inspection, reliance on manual labor, and insufficient accuracy associated with traditional bubble methods. It significantly improves product quality control, production efficiency, and safety, and has significant economic and social benefits.

[0012] The embodiments of this utility model are implemented as follows:

[0013] An online positive pressure detection device for a dialysis tubing air reservoir, comprising:

[0014] Conveyor line for continuous transport of dialysis tubing air jugs;

[0015] At least one set of positioning and lifting components is set at the inspection station of the conveyor line, including a position sensor and a lifting drive. The position sensor is used to identify the air bottle that has reached the inspection station, and the lifting drive is used to lift the identified air bottle away from the conveyor line to a predetermined inspection height.

[0016] The sealing docking assembly includes a linear actuator positioned laterally to the detection port and a sealing joint connected to the actuating end of the linear actuator. The linear actuator is used to drive the sealing joint to move horizontally to insert into the side wall interface of the raised air bottle.

[0017] The air pressure detection assembly, connected to a sealed joint via pipeline, includes an air source input unit, a pressure control valve, an on / off solenoid valve, and a pressure sensing unit;

[0018] The controller is connected to the air pressure detection component, position sensor, lifting drive component, and linear driver signal respectively.

[0019] In a preferred embodiment of the present invention, the positioning and lifting assembly further includes a limiting pressure plate disposed above the testing station.

[0020] In a preferred embodiment of this utility model, the above-mentioned lifting drive component is a double-guide column lifting cylinder, and the piston rod end of the lifting cylinder is provided with a U-shaped positioning bracket that matches the bottom contour of the air bottle.

[0021] In a preferred embodiment of this utility model, the sealing connector is a quick-connect straight connector, and the contact surface between the quick-connect straight connector and the air bottle interface is provided with an elastic sealing ring.

[0022] In a preferred embodiment of this utility model, a floating buffer mechanism is provided between the sealing joint and the push rod of the linear actuator.

[0023] In a preferred embodiment of the present invention, the sealing docking assembly further includes a laser alignment sensor. The emitting end of the laser alignment sensor is coaxially mounted with the sealing joint and is used to monitor the distance between the joint and the air bottle interface in real time.

[0024] In a preferred embodiment of the present invention, the above-mentioned air pressure detection component further includes a pressure relief branch, which is composed of a normally closed electromagnetic pressure relief valve and is connected in parallel with the outlet of the on / off solenoid valve. After the detection is completed, the controller triggers the pressure relief valve to open instantaneously.

[0025] In a preferred embodiment of the present invention, the above-mentioned air pressure detection component further includes a mechanical pressure gauge connected in parallel to the pipeline.

[0026] In a preferred embodiment of the present invention, the controller further includes a time relay for precisely controlling the pressure holding time.

[0027] In a preferred embodiment of this utility model, an audible and visual alarm is also provided at the above-mentioned testing station, and the audible and visual alarm is connected to the controller signal.

[0028] The beneficial effects of this utility model embodiment are:

[0029] 1. Adopting dry positive pressure testing technology, the water tank immersion process is completely eliminated. During the testing process, the air bottle does not come into contact with water or destructive solvents. After the test, the product is intact and can be directly used for subsequent production or clinical use. This completely solves the problem of traditional methods that result in the product being scrapped after testing, significantly saving resources and reducing production costs.

[0030] 2. Through continuous transmission and automated positioning, docking, and inspection processes via conveyor lines, 100% online full inspection is achieved. There is no need to wait for the water surface to calm down, the inspection cycle is greatly shortened, usually only a few seconds, and the inspection efficiency is multiplied. This perfectly meets the needs of modern high-speed production lines and ensures that every product leaving the factory undergoes airtightness verification.

[0031] 3. The position sensor automatically identifies the air bottle arriving at the inspection station; the lifting drive unit, in conjunction with the optional limit plate, precisely and stably lifts and fixes the air bottle to the predetermined inspection height; the linear actuator drives the sealing joint to automatically and accurately insert into the side wall interface of the air bottle, forming a reliable seal; the air pressure detection component automatically completes inflation, pressure holding, pressure change monitoring, and result judgment under the controller's command; after the inspection is completed, the pressure relief valve automatically and instantaneously opens to release pressure, ensuring safe separation; the lifting cylinder descends, and the product falls back onto the conveyor line and flows away, achieving a high degree of automation and reducing human intervention;

[0032] 4. The pressure sensor provides objective and quantitative pressure readings or pressure drop data, avoiding subjective errors from human observation. The precision pressure control valve ensures accurate and stable test pressure. The laser alignment sensor ensures docking accuracy and reduces sealing failure or product damage caused by misalignment. The floating buffer mechanism absorbs minor deviations during docking, protecting the product and the joint. The time relay precisely controls the holding time, ensuring consistent testing standards and guaranteeing testing accuracy and high reliability.

[0033] 5. The testing device only needs to be connected to the factory's gas supply, without the need for water tanks, water sources, or adhesive solvents. The site is cleaner, the operation is safer and more environmentally friendly, and it can eliminate product scrap costs and significantly reduce testing labor costs, such as changing from manual bonding, soaking, and observation to equipment monitoring, thus reducing overall costs. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the online positive pressure detection device for the dialysis tube air vessel in this embodiment of the present invention before startup;

[0036] Figure 2 This is a schematic diagram of the structure of the online positive pressure detection device for the dialysis tube air vessel according to an embodiment of the present invention after startup;

[0037] Figure 3 This is a schematic diagram of the sealing and docking assembly structure according to an embodiment of the present utility model;

[0038] Figure 4 This is a schematic diagram of the connection of the air pressure detection component according to an embodiment of the present utility model;

[0039] Figure 5 This is a schematic diagram of the control of the online positive pressure detection device for the dialysis tube air vessel according to an embodiment of the present invention;

[0040] Icons: Conveyor line 1; Inspection station 11; Positioning and lifting assembly 2; Position sensor 21; Lifting drive 22; Double guide column lifting cylinder 221; U-shaped positioning bracket 222; Limiting pressure plate 23; Sealing docking assembly 3; Linear driver 31; Sealing joint 32; Floating buffer mechanism 33; Laser alignment sensor 34; Air pressure detection assembly 4; Air source input unit 41; Pressure control valve 42; On / off solenoid valve 43; Pressure sensing unit 44; Normally closed solenoid pressure relief valve 45; Mechanical pressure gauge 46; Audible and visual alarm 47; Controller 5; Time relay 51; Air bottle 6; Inspection rack 7. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] First Embodiment

[0048] Please refer to Figure 1-5 This embodiment provides a positive pressure online detection device for dialysis tubing air jugs, which includes: a conveyor line 1, at least one set of positioning and lifting components 2 disposed on the conveyor line 1, a sealing docking component 3 matching the number of air jugs tested at one time, a pressure detection component 4 for positive pressure online detection, and a controller 5.

[0049] Among them, conveyor line 1 is used for continuous transmission of dialysis tube air bottle 6.

[0050] A positive pressure online testing station 11 is set up at a certain point on conveyor line 1, and a testing device is installed thereon. At least one set of positioning and lifting components 2 is set on the conveyor line 1 corresponding to the testing station 11, which is used to test the air tightness of one or more air tanks 6 in parallel, so as to improve the testing efficiency.

[0051] The positioning and lifting assembly 2 includes a position sensor 21 and a lifting drive 22. The position sensor 21 is used to identify the air bottle 6 that has reached the detection station 11, and the lifting drive 22 is used to lift the identified air bottle 6 away from the conveyor line 1 to a predetermined detection height.

[0052] In this embodiment, the position sensor 21 is a photoelectric switch, but other position sensors 21 can also be selected, such as magnetic encoders, laser rangefinders, etc.

[0053] In this embodiment, the lifting drive 22 adopts a double guide column lifting cylinder 221 to prevent the air bottle 6 from tilting. The piston rod end of the lifting cylinder is provided with a U-shaped positioning bracket 222 that matches the bottom contour of the air bottle 6 to ensure stable lifting of the air bottle 6.

[0054] In this embodiment, the position sensor 21 is provided in two locations: one is set on the conveyor line 1 to detect whether the air bottle 6 has been transported to the correct position, and the other is set on the lifting cylinder to monitor the lifting height of the bracket and ensure that the sealing docking assembly 3 can be smoothly inserted into the air bottle 6.

[0055] Furthermore, the positioning and lifting assembly 2 also includes a limiting pressure plate 23 set above the inspection station 11. The limiting pressure plate 23 is made of flexible material and fixed to the bottom of the inspection frame. The lifting drive component 22 cooperates with the limiting pressure plate 23 to accurately and stably lift and fix the air bottle 6 to the predetermined inspection height and prevent damage to the air bottle 6.

[0056] The sealing assembly 3 includes a linear actuator 31 positioned laterally at the detection port and a sealing connector 32 connected to the actuating end of the linear actuator 31. The linear actuator 31 drives the sealing connector 32 to move horizontally to insert into the side wall interface of the raised air bottle 6. In this embodiment, the linear actuator 31 is also a cylinder, and the sealing connector 32 is a quick-connect straight connector. The contact surface between the quick-connect straight connector and the air bottle 6 interface is provided with an elastic sealing ring to ensure a sealing effect.

[0057] Furthermore, a floating buffer mechanism 33 is provided between the sealing joint 32 and the push rod of the linear actuator 31 to absorb minor deviations during the docking process and protect the product and the joint. The floating buffer mechanism 33 includes a flexible column and an axial spring sleeved on the flexible column. It allows for a certain degree of angle self-adaptation, while the added pre-compression structure of the sealing ring ensures airtightness.

[0058] In this embodiment, the sealing and docking assembly 3 is disposed on the side wall of the testing station 11 of the testing frame, and its opposite surface is a baffle wall, so that it will not fall off during the docking process between the sealing connector 32 and the air bottle 6. In other embodiments, other blocking devices can be used, such as a cylinder block, which moves towards the sealing connector 32 to ensure that the sealing connector 32 is inserted into the air bottle 6 interface.

[0059] Furthermore, the sealing and docking assembly 3 also includes a laser alignment sensor 34. The emitting end of the laser alignment sensor 34 is coaxially mounted with the sealing joint 32 to monitor the distance between the joint and the air bottle 6 interface in real time, ensuring docking accuracy and reducing sealing failure or product damage caused by misalignment.

[0060] The air pressure detection assembly 4 is connected to the sealing joint 32 via pipelines and includes an air source input unit 41, a pressure control valve 42, an on / off solenoid valve 43, and a pressure sensing unit 44. The controller 5 is connected to the air pressure detection assembly 4, the position sensor 21, the lifting drive component 22, and the linear actuator 31 via signals and switches. The controller 5 also includes a time relay 51 for precisely controlling the pressure holding time. The time relay 51 precisely controls the pressure holding time to ensure consistent testing standards.

[0061] Furthermore, the air pressure detection component 4 also includes a pressure relief branch. The pressure relief valve design ensures that there is no residual pressure in the pipeline after testing, and the separation operation is safe. Specifically, the pressure relief branch consists of a normally closed electromagnetic pressure relief valve 45, which is connected in parallel with the outlet of the on / off solenoid valve 43. The controller 5 triggers the pressure relief valve to open instantaneously after the test is completed. The air pressure detection component 4 also includes a mechanical pressure gauge 46 connected in parallel to the pipeline. The pressure gauge is set on the top of the testing frame 7 for easy observation. At the same time, an audible and visual alarm 47 is also installed on the testing station 11, and the audible and visual alarm 47 is connected to the controller 5 via a signal connection.

[0062] The control system is configured as follows:

[0063] a) When the switch is turned on, the positive pressure online detection device starts; in response to the signal from position sensor 21, the lifting drive 22 is triggered to lift the air tank 6;

[0064] b) Control the linear actuator 31 to push the sealing joint 32 to complete the interface sealing;

[0065] c) Control the opening of the on / off solenoid valve 43 to fill the air tank 6 with detection gas through the air pressure detection system;

[0066] d) During the preset pressure holding time, the pressure sensor unit 44 monitors the air pressure change;

[0067] e) When the detected air pressure decay exceeds the threshold, an alarm signal is output.

[0068] This specification describes examples of embodiments of the present invention, but does not imply that these embodiments illustrate and describe all possible forms of the present invention. It should be understood that the embodiments in the specification can be implemented in various alternative forms. The drawings are not necessarily drawn to scale; some features may be enlarged or reduced to show details of specific components. The specific structural and functional details disclosed should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to implement the present invention in various forms. Those skilled in the art will understand that multiple features illustrated and described with reference to any of the drawings can be combined with features illustrated in one or more other drawings to form embodiments not explicitly illustrated or described. The illustrated combinations of features provide representative embodiments for typical applications. However, various combinations and variations of features consistent with the teachings of the present invention may be used as needed for specific applications or implementations.

[0069] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positive pressure on-line detection device for dialysis tubing air bell, characterized in that, include: Conveyor line for continuous transport of dialysis tubing air jugs; At least one set of positioning and lifting components is set at the detection station of the conveyor line, including a position sensor and a lifting drive. The position sensor is used to identify the air bottle that has reached the detection station, and the lifting drive is used to lift the identified air bottle away from the conveyor line to a predetermined detection height. A sealing docking assembly includes a linear actuator disposed on the side of the detection hole and a sealing connector connected to the actuating end of the linear actuator. The linear actuator is used to drive the sealing connector to move in a horizontal direction to insert into the side wall interface of the raised air bottle. The air pressure detection assembly is connected to the sealed joint via a pipeline and includes an air source input unit, a pressure control valve, an on / off solenoid valve, and a pressure sensing unit. The controller is connected to the air pressure detection component, position sensor, lifting drive component, and linear driver respectively.

2. The dialysis tube air pot positive pressure on-line detection device according to claim 1, characterized in that, The positioning and lifting assembly also includes a limiting pressure plate disposed above the testing station.

3. The dialysis tube air pot positive pressure on-line detection device according to claim 1, characterized in that, The lifting drive is a double-guide-column lifting cylinder, and the piston rod end of the lifting cylinder is provided with a U-shaped positioning bracket that matches the bottom contour of the air bottle.

4. The online positive pressure detection device for the dialysis tubing air vessel according to claim 1, characterized in that, The sealing connector is a quick-connect straight connector, and the contact surface between the quick-connect straight connector and the air bottle interface is provided with an elastic sealing ring.

5. The online positive pressure detection device for the dialysis tubing air vessel according to claim 1, characterized in that, A floating buffer mechanism is provided between the sealing joint and the push rod of the linear actuator.

6. The online positive pressure detection device for the dialysis tubing air vessel according to claim 1, characterized in that, The sealing docking assembly also includes a laser alignment sensor, the emitting end of which is coaxially mounted with the sealing joint to monitor the distance between the joint and the air bottle interface in real time.

7. The online positive pressure detection device for the dialysis tubing air vessel according to claim 1, characterized in that, The air pressure detection component also includes a pressure relief branch, which is composed of a normally closed electromagnetic pressure relief valve and is connected in parallel with the outlet of the on / off solenoid valve. The controller triggers the pressure relief valve to open instantaneously after the detection is completed.

8. The online positive pressure detection device for the dialysis tubing air vessel according to claim 1, characterized in that, The air pressure detection component also includes a mechanical pressure gauge connected in parallel to the pipeline.

9. The online positive pressure detection device for the dialysis tubing air vessel according to claim 1, characterized in that, The controller also includes a time relay for precise control of the pressure holding time.

10. The online positive pressure detection device for the dialysis tubing air vessel according to claim 1, characterized in that, An audible and visual alarm is also installed at the testing station, and the audible and visual alarm is connected to the controller via a signal connection.

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