Pressure monitoring self-adaptive connecting device
By designing the connectors and elastic components of the adaptive connection device, the sealing problem caused by shape and position deviations in hemodialysis equipment was solved, achieving stable connection and accurate detection of the pressure monitoring interface, simplifying the operation process and extending the equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-03-10
AI Technical Summary
The fixed position of the pressure monitoring interface in traditional hemodialysis or purification equipment leads to shape and position deviations in the production of integrated tubing consumables, affecting sealing and connection reliability, and making operation cumbersome and inefficient.
An adaptive connection device is adopted, including a connector, an elastic element, and a connection assembly. The elastic element allows the connector to move circumferentially within the connection groove, compensating for dimensional and positional deviations and ensuring a stable and reliable sealed connection between the pressure box and the equipment interface. The conical structure and seals also improve the accuracy of the test.
This achieves a stable and reliable sealed connection between the pressure box and the equipment interface, improves the stability and accuracy of pressure sensor detection, simplifies the operation process, extends the service life of the equipment, and reduces maintenance requirements.
Smart Images
Figure CN223979971U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a pressure monitoring adaptive connection device. Background Technology
[0002] In order to ensure the safety of treatment during blood purification or hemodialysis, pressure monitoring is required at multiple locations in the extracorporeal circulation tubing. Therefore, a pressure box needs to be connected to the pressure monitoring interface of the hemodialysis or blood purification equipment.
[0003] A pressure chamber is a device internally divided into two independent chambers by a diaphragm: a fluid chamber and a gas chamber. When liquid flows through the fluid chamber, changes in its flow state cause changes in the pressure difference across the diaphragm. These pressure differences are transmitted through the diaphragm to the gas chamber. A pressure sensor installed in the gas chamber can accurately detect minute pressure changes and indirectly calculate the actual flow of the liquid based on this.
[0004] Traditionally, pressure is monitored by pressure sensors within the equipment. This requires individually connecting each pressure box on the integrated tubing consumable to the monitoring interface on the hemodialysis or blood purification equipment, a cumbersome and inefficient process that inconveniences medical staff and adds to their workload. To simplify this process, multiple pressure boxes are now integrated into one unit, allowing for simultaneous one-click connection of multiple pressure boxes to all pressure monitoring interfaces, simplifying the process and improving efficiency. However, the positions of the pressure monitoring interfaces on most hemodialysis or purification equipment are currently fixed, and unavoidable shape and position deviations occur during the manufacturing process of integrated tubing consumables, affecting the sealing and connection reliability of the pressure boxes on the integrated tubing consumables with the equipment interfaces. Utility Model Content
[0005] The purpose of this invention is to provide a pressure monitoring adaptive connection device that can ensure a stable and reliable sealed connection between the pressure box and the monitoring interface on the hemodialysis or purification equipment.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pressure monitoring adaptive connection device, comprising a sealing component disposed on the equipment and a connecting component for mounting a pressure box; the sealing component includes a connector and a support, the support having a connecting groove, and an elastic element coaxially sleeved on the outside of the connector between the support and the connector; one end of the elastic element is fixedly mounted on the side wall of the connecting groove, and the other end is fixedly mounted on the side wall of the connector; the connector has a channel communicating with a pressure sensor, and the connecting component is used to drive the pressure box to move so that the pressure box abuts against the connector.
[0007] The technical principle of this utility model is as follows: the connector can move circumferentially within the connecting groove to become an adaptive interface. When the connecting component drives the pressure box to move and abut against the connector, the elastic element can be used to press the connector against the pressure box, overcoming the unavoidable shape and position deviations that will occur during the production of integrated pipeline consumables, and ensuring the stability and sealing between the connector and the pressure box.
[0008] Furthermore, the connecting assembly includes a mounting plate, a first connecting plate, a second connecting plate, and a driving component. The driving component and the second connecting plate are both disposed inside the device. The driving component abuts against the second connecting plate to drive the second connecting plate to move. The first connecting plate passes through the device and is disposed between the mounting plate and the second connecting plate. The mounting plate is disposed outside the device, and the pressure box is fixedly mounted on the mounting plate.
[0009] Furthermore, the end of the connector furthest from the blood purification or hemodialysis equipment is tapered.
[0010] Furthermore, the channel includes a first cylindrical channel and a second conical channel that are interconnected.
[0011] Furthermore, the angle between the busbar of the second channel and the central axis on the same vertical plane ranges from 0.5° to 150°, and the interface between the pressure box 9 and the connector 1 is also conical with an angle range of 0.5° to 150°, and the size of the angle of the second channel matches the size of the angle at the pressure box interface.
[0012] Furthermore, the circumferential movement angle of the connection point between the connector and the equipment within the connection groove ranges from 0° to 15°.
[0013] Furthermore, the travel range of the elastic element is 0–10 mm.
[0014] Furthermore, it also includes a fixing assembly for fixing a pressure sensor installed in a blood purification or hemodialysis device. The fixing assembly includes a housing with a first cavity and a second cavity that are interconnected. The pressure sensor is installed in the second cavity. The end of the connector away from the pressure box passes through the first cavity and abuts against the pressure sensor. A first seal is provided in the first cavity that abuts against the side wall of the connector. A second seal is provided in the second cavity that abuts against the pressure sensor.
[0015] Furthermore, the first cavity has a groove on its side wall, and the side wall of the connector near the pressure sensor has a protrusion. The first seal is coaxially sleeved on the protrusion, and the first seal is configured to cooperate with the groove.
[0016] Furthermore, a retaining ring for fixing the pressure sensor is also provided inside the second cavity.
[0017] The beneficial effects of this utility model are as follows:
[0018] 1. Through the setting of elastic elements and connecting components, the connector can move circumferentially in the connecting groove to become an adaptive interface pressure box to abut, overcoming the unavoidable shape and position deviations that will occur during the production process of integrated pipeline consumables, and ensuring a stable and reliable sealed connection between the pressure box and the monitoring interface on the hemodialysis or purification equipment.
[0019] 2. The protrusion allows the first seal to expand, enabling it to fit tightly against the tooth groove, thus forming a reliable seal.
[0020] 3. By setting the second sealing element, it can be ensured that all the gas passing through the joint acts on the pressure sensor, thereby improving the stability and accuracy of the pressure sensor's detection value. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the second structure of the present invention;
[0023] Figure 3 This is a cross-sectional view of the present invention;
[0024] Figure 4 This is a cross-sectional view of the connector in this utility model;
[0025] Figure 5 This is a cross-sectional view of the outer shell of this utility model;
[0026] Figure 6 This is a cross-sectional view of the connection between the pressure box and the connector;
[0027] Figure 7 This is a schematic diagram of the first structure of the connecting components;
[0028] Figure 8 This is a schematic diagram of the second structure of the connecting component;
[0029] Figure 9 This is a schematic diagram of the joint rotation in this utility model.
[0030] In the above attached figures:
[0031] 1. Connector; 101. First channel; 102. Second channel;
[0032] 2. Elastic components;
[0033] 3. Support; 301. Connecting through groove;
[0034] 4. Outer shell; 401. First cavity; 402. Second cavity;
[0035] 5. First seal; 6. Second seal; 7. Retaining ring; 8. Pressure sensor; 9. Pressure box;
[0036] 10. Mounting plate; 11. First connecting plate; 12. Second connecting plate; 13. Drive component. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments; the structures described in various embodiments can be freely combined without conflict in terms of structure or principle.
[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "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," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0040] The following description, in conjunction with the accompanying drawings, describes some embodiments of the present invention:
[0041] like Figures 1-8 As shown, this utility model proposes a pressure monitoring adaptive connection device, including a sealing component installed on the device and a connection component for installing a pressure box 9; the sealing component includes a connector 1 and a support 3, the support 3 has a connecting groove 301, and an elastic element 2 is coaxially sleeved on the connector 1 between the support 3 and the connector 1; one end of the elastic element 2 is fixedly installed on the side wall of the connecting groove 301, and the other end is fixedly installed on the side wall of the connector 1; the connector 1 has a channel communicating with the pressure sensor, and the connection component is used to drive the pressure box 9 to move so that the pressure box 9 abuts against the connector 1.
[0042] Pressure boxes 9 are evenly distributed on the connecting assembly. When the connecting assembly moves, it drives the pressure boxes 9 to move synchronously, so that the pressure boxes 9 abut against the connector 1. When there is an error between the interface position of the pressure box 9 and the connector 1, the connector 1 moves circumferentially within the connecting groove 301 around the connection point between the connector 1 and the blood purification or hemodialysis equipment. The elastic element 2 moves synchronously with the connector 1 to match the position of the interface of the pressure box 9. When the pressure box 9 is pressed into the connector, the elastic element 2 will generate a reaction force, so that the connector 1 and the pressure box 9 always abut against each other and are sealed. Through the cooperation of the connector 1 and the elastic element 2, the connector 1 can adaptively connect with the pressure box 9, compensate for the form and position deviation caused by the manufacturing process, and ensure the stability and sealing between the connector 1 and the pressure box 9. Moreover, the setting of the elastic element 2 gives the connector 1 a certain degree of floating (it can move around the connection point between the connector 1 and the blood purification or hemodialysis equipment). Here, the elastic element 2 can be selected as a spring, etc., but to ensure the stability and sealing between the connector 1 and the pressure box 9, a spring is preferred. The change in air pressure in the gas chamber of the pressure box is introduced into the device through the channel in connector 1. The air pressure of each channel is then connected in series and the overall air pressure is applied to the pressure sensor 8 to detect the pressure change in real time.
[0043] The circumferential movement angle of connector 1 around the connection point between connector 1 and the equipment within the connecting groove 301 ranges from 0° to 15°. When the circumferential movement angle is 0°, the central axis of connector 1 coincides with the central axis of pressure box 9, and connector 1 and pressure box 9 can form a good sealing effect. When the circumferential movement angle is other angles, through a certain angle of motion compensation, connector 1 can better adapt to the slight offset and vibration of the pipeline or equipment, thereby reducing the risk of leakage caused by alignment problems and improving the reliability of the overall system. Secondly, it helps to disperse the pressure in the stress concentration area, reduce fatigue damage caused by continuous vibration or temperature changes, extend the service life of the equipment, and maintain the long-term stable operation of the system. Finally, even if there are slight installation errors, the optimal matching state can be achieved through the motion compensation of connector 1.
[0044] The travel range of the elastic element is 0-10mm. At the 0mm position, connector 1 has already formed initial contact with the mating parts, while the 10mm travel provides additional space to ensure that even with slight dimensional deviations or alignment problems in practical applications, full contact can be achieved through adjustment, thereby ensuring good sealing performance. The 0-10mm travel range helps to disperse stress during installation, avoiding local stress concentration caused by forced mating, which can extend the service life of connector 1 and reduce maintenance requirements. The 0-10mm travel provides a certain margin of error during installation. Even if the initial installation is not perfectly aligned, it can be corrected through adaptive adjustment. In some high-pressure or high-risk applications, the 0-10mm travel can act as a safety buffer to prevent damage to connector 1 due to overpressure or other unexpected situations.
[0045] Furthermore, such as Figure 7 and Figure 8 As shown, the connecting assembly includes a mounting plate 10, a first connecting plate 11, a second connecting plate 12, and a driving component 13. The driving component 13 and the second connecting plate 12 are both disposed inside the device. The driving component 13 abuts against the second connecting plate 12 to drive the second connecting plate 12 to move. The first connecting plate 11 passes through the device and is disposed between the mounting plate 10 and the second connecting plate 12. The mounting plate 10 is disposed outside the device, and the pressure box 9 is fixedly mounted on the mounting plate 10.
[0046] The pressure box 9 and the mounting plate 10 are integrally formed. The drive component 13 is a telescopic motor. The second connecting plate 12 is fixedly mounted on the power output shaft of the telescopic motor. When the telescopic motor is working, it drives the second connecting plate 12 to move synchronously. The second connecting plate 12 drives the mounting plate 10 to move synchronously through the first connecting plate 11, thereby driving the pressure box 9 to move and abut against the joint. The stroke of the telescopic motor is greater than the maximum error gap between the joint and the pressure box 9 to ensure that all joints are sealed to the pressure box 9.
[0047] Furthermore, such as Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the end of connector 1 furthest from the blood purification or hemodialysis equipment is tapered.
[0048] Currently, hemodialysis or blood purification equipment is mainly equipped with two types of pressure monitoring interfaces: one is a standard 6% Luer inner cone locking connector 1 suitable for general tubing consumables, and the other is a non-standard structure connector 1 designed specifically for certain consumables. One end of the pressure box 9 connects to connector 1 in a conical shape that mates with connector 1. This conical structure allows for docking with specialized consumables and also provides guidance, ensuring accuracy and stability during the connection process. The conical connector 1 also limits the movement of the elastic element 2, preventing it from detaching from connector 1.
[0049] Furthermore, such as Figure 3 and Figure 4 As shown, the channel includes a first cylindrical channel 101 and a second conical channel 102 that are interconnected.
[0050] The diameter of the lower end of the second channel 102 is the same as the diameter of the first channel 101. The angle between the generatrix of the conical second channel 102 and the central axis on the same vertical plane is in the range of 0.5° to 150°. The interface between the pressure box 9 and the connector 1 is also conical with an angle in the range of 0.5° to 150°. The size of the angle of the second channel 102 matches the size of the angle at the interface of the pressure box 9. The corresponding connector 1 is matched according to the size of the angle at the interface of the pressure box 9.
[0051] When the angle at the interface of the pressure box 9 and the design angle of the second conical channel 102 are at the minimum value of 0.5°, sufficient contact area and stability can still be provided to ensure good performance even under extreme conditions.
[0052] When the maximum design angle is set to 150°, the design allows for connection between pressure box 9 and connector 1 within a very wide range of angles. The larger cone angle can more easily accommodate larger axial and radial positional deviations, making the installation process more flexible and reducing the need for precise alignment. In some applications, such as high-pressure or high-vibration environments, the larger contact surface can provide better sealing and prevent leakage.
[0053] The preferred design angle here is 30°, which balances the tightness of the connection, ease of installation, and manufacturing economy. The 30° cone angle provides a moderate contact surface, helping to reduce material stress concentration while maintaining sufficient strength, thereby improving the overall stability and durability of the joint and facilitating the formation of an effective sealing layer. This is particularly important in applications requiring pressure resistance or leak prevention, ensuring a good seal at the joint and reducing fluid or gas penetration. Secondly, the 30° cone angle provides good alignment tolerance; even with slight axial or radial misalignment, the pressure box 9 and the connector 1 can achieve an effective connection, simplifying the installation process and reducing the requirements for operational precision. Finally, from a manufacturing perspective, the 30° cone angle is adaptable to most processing techniques while keeping production costs within a reasonable range.
[0054] The conical second channel 102 improves the sealing between the connector 1 and the sealing box, while the cylindrical first channel 101 ensures the stability of the gas passing through it and reduces gas fluctuations, thereby making the data detected by the pressure sensor 8 more stable.
[0055] Furthermore, such as Figure 1 , Figure 3 and Figure 5 As shown, it also includes a fixing assembly for fixing the pressure sensor 8 within the blood purification or hemodialysis equipment. The fixing assembly includes a housing 4 with a first cavity 401 and a second cavity 402 that are interconnected. The pressure sensor 8 is disposed in the second cavity 402. The end of the connector 1 away from the pressure box 9 passes through the first cavity 401 and abuts against the pressure sensor 8. A first sealing element 5 is disposed in the first cavity 401 and abuts against the side wall of the connector 1. A second sealing element 6 is disposed in the second cavity 402 and abuts against the pressure sensor 8.
[0056] By setting up fixed components, multiple pressure sensors 8 that are matched with pressure boxes 9 can be set up at the same time, so that the pressure changes in each pressure box 9 can be detected individually, thereby obtaining more accurate detection results. At the same time, the source of pressure change can be accurately identified through pressure boxes 9 with large changes.
[0057] The first sealing element 5 isolates the first cavity 401 from the outside, preventing gas entering the first cavity 401 from leaking to the outside and improving the accuracy of the pressure sensor 8's detection data. The second sealing element 6 seals the contact surface between the connector 1 and the pressure sensor 8, further improving the accuracy of the pressure sensor 8's detection data.
[0058] Furthermore, such as Figure 3 and Figure 5As shown, the first cavity 401 has a groove on its side wall, and the connector 1 has a protrusion on its side wall near the pressure sensor 8. The first seal 5 is coaxially sleeved on the protrusion, and the first seal 5 is configured to cooperate with the groove.
[0059] The first seal 5 is made of an elastic material. The protrusions allow the first seal 5 to expand, enabling it to fit tightly within the tooth groove, thereby improving the sealing performance and the accuracy of the data monitored by the pressure sensor 8. These protrusions can be wavy, stepped, or pagoda-shaped, but a pagoda shape is preferred to facilitate the expansion of the first seal 5.
[0060] Furthermore, such as Figure 2 As shown, a retaining ring 7 for fixing the pressure sensor 8 is also provided in the second cavity 402.
[0061] By setting the retaining ring 7, not only can the pressure sensor 8 be fixed, but its clamping force can also further improve the stability and sealing of the overall structure.
Claims
1. A pressure monitoring adaptive connection device, characterized by: The application relates to a sealing assembly and a connecting assembly for installing a pressure box (9) on a blood purification or hemodialysis device.
2. A pressure monitoring self-adapting connection device according to claim 1, characterized in that, The connecting assembly comprises a mounting plate (10), a first connecting plate (11), a second connecting plate (12) and a driving member (13), the driving member (13) and the second connecting plate (12) are arranged in the device, the driving member (13) and the second connecting plate (12) abut against each other to drive the second connecting plate (12) to move, the first connecting plate (11) penetrates through the device and is arranged between the mounting plate (10) and the second connecting plate (12), the mounting plate (10) is arranged outside the device, and the pressure box (9) is fixedly arranged on the mounting plate (10).
3. A pressure monitoring self-adapting connection device according to claim 1 or 2, characterized in that, The end of the joint (1) away from the blood purification or hemodialysis device is conical.
4. A pressure monitoring self-adapting connection device according to claim 1 or 2, characterized in that, The channel comprises a first straight-cylinder channel (101) and a second conical channel (102) which are connected to each other.
5. A pressure monitoring self-adapting connection device according to claim 4, characterized in that, The included angle between the generatrix of the second channel (102) and the central axis is in the range of 0.5-150 degrees in the same vertical plane, the interface of the pressure box (9) contacting the joint (1) is also conical with an included angle in the range of 0.5-150 degrees, and the size of the angle of the second channel (102) matches the size of the angle of the interface of the pressure box (9).
6. A pressure monitoring self-adapting connection device according to claim 1, 2 or 5, characterized in that, The angle range of the circumferential movement of the joint (1) around the connecting point between the device and the connecting channel (301) is 0-15 degrees.
7. A pressure monitoring self-adapting connection device according to claim 1, 2 or 5, characterized in that, The stroke range of the elastic member (2) is 0-10 mm.
8. A pressure monitoring self-adapting connection device according to claim 1, 2 or 5, characterized in that, The application further discloses a fixing assembly arranged in the device for fixing the pressure sensor (8), the fixing assembly comprises an outer shell (4) provided with a first cavity (401) and a second cavity (402) which are connected to each other, the pressure sensor (8) is arranged in the second cavity (402), the end of the joint (1) away from the pressure box (9) penetrates through the first cavity (401) and abuts against the pressure sensor (8), the first cavity (401) is provided with a first sealing member (5) abutting against the side wall of the joint (1), and the second cavity (402) is provided with a second sealing member (6) abutting against the pressure sensor (8).
9. A pressure monitoring self-adapting connection device according to claim 8, characterized in that, The side wall of the first cavity (401) is provided with a tooth groove, the side wall of the joint (1) close to the pressure sensor (8) is provided with a protrusion, the first sealing member (5) is coaxially sleeved on the protrusion, and the first sealing member (5) is arranged in cooperation with the tooth groove.
10. The pressure monitoring self-adapting connection device of claim 8, wherein, The second cavity (402) is further provided with a retaining ring (7) for fixing the pressure sensor (8).