Air leakage and liquid leakage preventing device connected with drainage tube

Abstract

The utility model discloses an air leakage and liquid leakage prevention device connected with a drainage tube, which relates to the technical field of drainage and comprises a main body structure and a sealing adjusting component, the sealing adjusting component consists of an elastic sealing element and an adjustable locking element, the elastic sealing element surrounds the periphery of a drainage channel, and the adjustable locking element is connected with the main body structure through threads. When the locking piece is screwed, the extrusion platform converts axial force into radial compression force, the elastic sealing piece is driven to deform, a dynamic sealing interface is formed to prevent gas-liquid leakage, and the drainage tube is fixed through radial friction force to prevent falling. The device adapts to drainage tubes with different outer diameters, and universal connection can be achieved only by adjusting the screwing degree of the locking piece. And by combining zero-taper clearance fit, a guide structure and a chamfering structure, the installation process is simplified, and the anti-falling performance is enhanced. The problems that a traditional connector is poor in sealing performance, single in adaptation and prone to falling off are solved, the infection risk is remarkably reduced, and the connector has the advantages of being efficient, universal and low in cost.

Description

Technical Field

[0001] This utility model relates to the field of drainage technology, specifically to a device for preventing air and liquid leakage when connecting a drainage tube. Background Technology

[0002] Negative pressure irrigation and drainage devices are medical devices primarily used to drain bodily fluids, contaminated blood, and secretions during medical procedures to promote wound healing and prevent infection. They work by creating a negative pressure environment to remove fluids from the body and are commonly used in various surgical and trauma treatments. Negative pressure irrigation and drainage devices are widely used clinically. In the existing technology, patent CN217548672U discloses a negative pressure irrigation and drainage device with drug delivery, drainage, and irrigation functions. This device achieves functional integration through a multi-channel design within the connector, but its connection structure still has the following limitations:

[0003] 1. Although a main channel and a drug delivery channel are provided, the drainage tube connection structure is simple and cannot adapt to the complex needs of multi-lumen drainage tubes. For example, the coordination between the injection, aspiration and drainage channels is poor, which requires frequent switching of interfaces during operation and reduces the efficiency of use.

[0004] 2. The sealing between the connector and the drainage tube mainly relies on traditional fixing methods (such as adhesive bonding or tapered fit), without introducing a dynamic sealing mechanism. This type of structure is prone to irregular gaps due to elastic deformation of the tube wall during the tightening process, leading to an increased risk of leakage, especially during negative pressure operation, which may cause environmental pollution and infection.

[0005] 3. Existing connectors are typically designed for a single model, only compatible with drainage tubes of a specific outer diameter. If a different size drainage tube is required, the entire connector must be replaced, increasing the complexity and cost of clinical procedures.

[0006] 4. Some connectors use a split structure (such as external cover fixation), which requires precise alignment with the cavity during installation. Due to improper dimensional tolerances or taper design, the drainage tube may be difficult to insert or the connection may be unstable, making it easy for it to fall off during clinical use.

[0007] Furthermore, while existing technologies have improved multi-cavity drainage devices, such as the one disclosed in patent CN105944220A, which uses a "sandwich" sponge and a multi-cavity catheter to enhance the irrigation effect, their core focus remains on wound treatment, without addressing the sealing and versatility issues of the connection structure. Patent CN220572450U discloses a novel negative pressure irrigation drainage device, which proposes a side-penetration design for the epidural catheter to simplify the medication delivery process, but its connection method still relies on traditional connectors, failing to achieve rapid insertion / removal and dynamic sealing.

[0008] In summary, there is an urgent need for those skilled in the art to design a novel connection and drainage structure to address the problems of insufficient separation of cavity functions, inadequate sealing performance, limited adaptability and poor versatility, and insufficient ease of installation in existing technologies. Utility Model Content

[0009] The problem this utility model aims to solve is to address the aforementioned deficiencies by providing a connection device that integrates multiple cavities, has a dynamic sealing mechanism, and is compatible with various specifications of drainage tubes. This device enables multi-cavity drainage, dynamic sealing, rapid installation, and universal compatibility, ensuring that the drainage connection is leak-proof (no air or liquid leakage), protecting the external environment, and avoiding the risk of operator infection due to leakage of drainage material. This significantly reduces the risk of infection and improves clinical operation efficiency.

[0010] To solve the above problems, this utility model provides a device for preventing air and liquid leakage when connecting a drainage tube, comprising:

[0011] The main structure has multiple interconnected functional cavities, including a drainage channel for fluid delivery, an injection and drug delivery channel for connecting to external devices, and a suction channel for negative pressure operation. By integrating the drainage channel, injection and drug delivery channel, and suction channel within the main structure, the cavities are interconnected and complementary, forming a multi-functional integrated and coordinated operation. Injection, suction, and drainage operations can be performed simultaneously without frequent interface switching, improving the continuity and efficiency of medical operations.

[0012] A sealing adjustment assembly includes an elastic seal and an adjustable locking member. The elastic seal is disposed around the outer periphery of the drainage channel, and the adjustable locking member is threadedly connected to the main structure and configured to apply radial compressive force to the elastic seal by axial displacement.

[0013] The tightening operation of the adjustable locking element triggers the deformation of the elastic seal to simultaneously achieve the following functions:

[0014] A dynamic sealing interface is formed on the outer wall of the drainage tube inserted into the drainage channel to prevent gas and liquid leakage;

[0015] The drainage tube is fixed by radial friction force generated by deformation to prevent it from falling off axially;

[0016] It can be adapted to drainage tubes of different outer diameters to form a universal connection structure.

[0017] Preferably, the main structure has a guide structure inside the drainage channel, and the guide structure is UV-cured and connected to the drainage channel.

[0018] Preferably, the extension end of the guide structure protrudes 2-3 mm beyond the inlet end face of the drainage channel, which is used to guide the axial insertion of the drainage tube and align it with the cavity.

[0019] Preferably, the elastic seal is an O-ring, whose inner diameter is matched with the outer diameter of the drainage tube to achieve stepless adjustable sealing.

[0020] Preferably, the inner wall of the adjustable locking member is provided with a compression platform, which contacts the upper and lower end faces of the elastic seal during the tightening process, thereby converting the axial locking force into a radial compressive force.

[0021] Preferably, the inlet face of the drainage channel has a chamfered structure, and it is elastically connected to the drainage tube through chamfered fit to form an anti-detachment connection structure.

[0022] Preferably, the front end of the rear drainage cavity has a pagoda-shaped chamfered structure, which can be elastically connected with the single-cavity drainage tube through chamfering, thereby adapting to drainage tubes of various specifications.

[0023] Preferably, the adjustable locking element is a sealing cover with an anti-slip groove texture on its outer surface, forming a multi-groove high friction structure, thereby increasing the operating friction and making it easy for clinicians to quickly tighten or loosen it.

[0024] Compared with the prior art, the present invention achieves the following beneficial technical effects:

[0025] This invention utilizes the synergistic effect of an elastic seal and an adjustable locking element to create a dynamic sealing interface during tightening. The deformation of the elastic seal automatically adapts to the outer diameter of the drainage tube, ensuring a tight fit against the outer wall of the drainage tube to prevent gas-liquid leakage. Furthermore, it secures the drainage tube through radial friction, enhancing dynamic sealing and leak-proof performance. This completely solves the problem of leakage caused by gaps due to tube wall deformation in traditional adhesive or tapered fits, significantly reducing environmental pollution and infection risks.

[0026] This utility model is highly versatile and adaptable to drainage tubes of various specifications. Through the stepless deformation design of the elastic seal, the inner diameter of the elastic seal matches the outer diameter of the drainage tube, so that the same device can be adapted to drainage tubes of extra-large, extra-small and different outer diameters. There is no need to change the device or special connectors. Stable connection can be achieved by simply adjusting the tightness of the locking part, which greatly improves the flexibility and efficiency of clinical operation.

[0027] This utility model's adjustable locking mechanism converts axial locking force into radial compression force through its compression platform. Combined with the frictional force of the elastic seal, this provides double protection against the drainage tube falling off. Furthermore, the chamfered structure at the drainage channel inlet, along with the gap design, allows for flexible docking of the drainage tube, avoiding insertion difficulties caused by dimensional tolerances. The guide structure protrudes 2-3mm from the drainage channel inlet face, precisely guiding the drainage tube axially into and aligning it with the cavity, simplifying the installation process and enabling rapid installation, further enhancing the anti-fall-off effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the device for preventing air and liquid leakage when connecting the drainage pipe according to this utility model.

[0029] Figure 2 This is a cross-sectional view of the device for preventing air and liquid leakage when connecting the drainage tube according to this utility model.

[0030] Figure 3 This is a schematic diagram of the internal cavity of the anti-leakage device for connecting the drainage tube of this utility model.

[0031] Figure 4 This is a schematic diagram of the installation and assembly of the gas and liquid leakage prevention device for connecting the drainage pipe of this utility model;

[0032] Figure 5 This utility model Figure 4 An enlarged schematic diagram of part A in the middle;

[0033] In the diagram: 1-Main structure, 2-Elastic seal, 3-Guiding structure, 4-Adjustable locking element, A-Injection chamber, B-Aspiration chamber, C-Rear drainage chamber, D-Front drainage chamber, E-Drug administration chamber, F-Sealing adjustment assembly. Detailed Implementation

[0034] The present invention will be further explained below with reference to the accompanying drawings and embodiments.

[0035] Reference Figures 1-5 As shown, this embodiment provides a device for preventing air and liquid leakage when connecting a drainage tube, including: a main structure 1, which integrates multiple interconnected cavities, including a drainage channel for fluid delivery, an injection and drug delivery channel for communication with external equipment, and a suction channel for negative pressure operation; the drainage channel specifically includes: a rear drainage cavity C, which is elastically connected to the single-cavity drainage tube through a chamfered structure, avoiding installation difficulties caused by dimensional tolerances, and ensuring that the drainage tube is easily installed and firmly fixed without falling off. Specifically, the front end of the rear drainage cavity C is pagoda-shaped. The angular structure allows for flexible docking with single-lumen drainage tubes via chamfered fit, thus adapting to various drainage tube specifications. The front drainage cavity D docks with multi-lumen drainage tubes, with its outer wall and the inner wall of the drainage tube using a non-tapered clearance fit, simplifying the installation process and reducing frictional resistance. The injection and drug delivery channel specifically includes: injection cavity A, for connecting to external injection equipment; and drug delivery cavity E, which communicates with injection cavity A to achieve drug delivery, forming a drug delivery channel and enabling simultaneous injection and drainage operations. The aspiration channel specifically includes: aspiration cavity B, for negative pressure aspiration operations.

[0036] The sealing adjustment assembly F includes an elastic seal 2 and an adjustable locking component 4. The elastic seal 2 is arranged around the outer periphery of the front drainage cavity D, and its inner diameter is matched with the outer diameter of the drainage tube by deformation to achieve stepless adjustment of the seal.

[0037] The adjustable locking element 4 is connected to the main structure 1 by threads, and its inner wall is provided with a compression platform. When the adjustable locking element 4 is tightened, the compression platform applies axial pressure to the upper and lower end faces of the elastic seal 2, converting it into radial compression force, causing the inner ring of the elastic seal 2 to deform and tightly fit against the outer wall of the drainage tube, forming a dynamic sealing interface.

[0038] The tightening operation of the adjustable locking element 4 triggers the deformation of the elastic seal 2 to simultaneously achieve the following functions:

[0039] The deformation of the elastic seal 2 automatically adapts to the outer diameter of the drainage tube, forming a dynamic sealing interface on the outer wall of the drainage tube inserted into the drainage channel. This not only prevents gas and liquid leakage, but also fixes the drainage tube through the radial friction force generated by the deformation, preventing it from falling off axially.

[0040] By adjusting the tightness of the adjustable locking element 4, the same device can be adapted to drainage tubes of different outer diameters (including extra-large or extra-small models) without the need to replace special connectors, forming a universal connection structure.

[0041] The main structure 1 has a guide structure 3 in the drainage channel. The hollow tube-shaped guide structure 3 is fixed to the main structure 1 by UV adhesive curing. The size of the guide structure 3 is 2-3mm higher than the surface of the front drainage cavity D, which has a guiding function and makes it easier to install the drainage tube (including but not limited to multi-cavity type) in the guide structure 3.

[0042] The adjustable locking component 4 is a sealing cover with anti-slip groove texture on its outer surface, forming a multi-groove strong friction structure, thereby increasing the operating friction and making it easy for clinicians to quickly tighten or loosen it.

[0043] During the installation of the drainage tube, it is very easy to install into the sealing adjustment component F. At this time, tighten the 0 adjustable locking part. According to the matching size requirements, the height of the adjustable locking part 4 cover is controlled structurally. Simply tighten the adjustable locking part 4 to the bottom to accurately control the deformation of the elastic sealing part 2. In this way, the deformation of the elastic sealing part 2 can not only seal different types of drainage tubes, but also increase the friction between it and the drainage tube wall, so that the drainage tube will not fall off. The front drainage cavity of D and the cavity inside the drainage tube are connected and sealed, and form an integrated cavity with the rear drainage cavity of C, the front drainage cavity of D, and the suction cavity of B. If the cavity is blocked, the drainage function can be restored by suction treatment through the suction cavity B.

[0044] To facilitate understanding of the above technical solutions of this utility model, the following detailed description of the above technical solutions of this utility model is provided through specific usage methods.

[0045] The specific working process is as follows: When inserting a single-lumen or multi-lumen drainage tube, align the drainage tube with the inlet end of the front drainage cavity D of the main structure 1. The guide structure 3 accurately guides the axial insertion of the drainage tube through its hollow tubular structure, ensuring cavity alignment and avoiding misalignment or friction damage. The non-tapered fit of the front drainage cavity D allows the drainage tube to easily slide into the sealing cavity of the sealing adjustment component F, reducing insertion resistance. The rear drainage chamber C is elastically connected to the single-chamber drainage tube through a chamfered structure, forming an anti-detachment connection. The front drainage chamber D is sealed and connected to the multi-chamber drainage tube, ensuring independent fluid delivery in each chamber and forming an integrated drainage system. Next, the adjustable locking component 4 is rotated. The compression platform on the inner wall of the adjustable locking component 4 moves downward as the thread tightens, applying axial pressure to the upper and lower end faces of the elastic seal 2. When the adjustable locking component 4 is tightened, the axial pressure applied to the upper and lower end faces of the elastic seal 2 by the compression platform is converted into radial compression force, forcing the inner ring of the elastic seal 2 to deform and tightly fit against the outer wall of the drainage tube, forming a dynamic sealing interface and preventing gas and liquid leakage. The deformation of the elastic seal 2 automatically adapts to the outer diameter of the drainage tube, achieving stepless adjustable sealing. At the same time, the drainage tube is fixed by radial friction to prevent it from axially detaching. By adjusting the tightening degree of the adjustable locking component 4, the same device can be adapted to drainage tubes with different outer diameters (including extra-large or extra-small models) without the need to replace special connectors. Next, the multi-cavity coordinated operation allows the external injection device to deliver the drug through injection cavity A to the through-hole drug delivery cavity E, achieving simultaneous drug delivery and drainage. If the drainage channel (rear drainage cavity C and front drainage cavity D) becomes blocked, negative pressure is applied through suction cavity B to aspirate the blockage and restore the drainage function.

[0046] This device solves the problems of poor sealing, limited compatibility, and easy detachment of existing connectors. It enables multi-cavity drainage, dynamic sealing, rapid installation, and universal compatibility, ensuring that the drainage connection is leak-proof and liquid-proof, protecting the external environment, and avoiding the risk of operator infection due to leakage of drainage material. This significantly reduces the risk of infection and improves the efficiency of clinical operations.

[0047] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0048] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. An air and liquid leakage prevention device for connecting a drainage tube, comprising: a main body structure (1) having a plurality of functional cavities in communication with each other, including a drainage channel for fluid delivery, an injection and administration channel for communicating with external equipment, and a suction channel for negative pressure operation; characterized in that a sealing adjustment assembly including an elastic sealing member (2) and an adjustable locking member (4), the elastic sealing member (2) being disposed around the outer periphery of the drainage channel, and the adjustable locking member (4) being connected to the main body structure (1) by threaded cooperation and configured to apply a radial compression force to the elastic sealing member (2) through axial displacement; wherein the tightening operation of the adjustable locking member (4) triggers the deformation of the elastic sealing member (2), forming a dynamic sealing interface with the outer wall of the drainage tube inserted into the drainage channel to prevent gas and liquid leakage, and fixing the drainage tube through the radial friction force generated by the deformation to prevent it from falling off axially; it is also suitable for drainage tubes of different outer diameter sizes, forming a universal connection structure.

2. The air and liquid leakage preventing device for connecting a drainage tube according to claim 1, characterized by The main body structure (1) is provided with a guide structure (3) in the drainage channel, and the guide structure (3) is connected with the drainage channel by UV curing.

3. The air and liquid leakage preventing device for connecting a drainage tube according to claim 2, characterized by The extension end of the guide structure (3) protrudes 2-3mm from the inlet end surface of the drainage channel, which is used to guide the axial insertion and alignment of the drainage tube.

4. The air and liquid leakage preventing device for connecting a drainage tube according to claim 1, characterized by The elastic sealing member (2) is an O-shaped sealing ring, and the inner diameter of the O-shaped sealing ring is matched with the outer diameter of the drainage tube through the deformation amount to realize stepless adjustment sealing.

5. The air and liquid leakage preventing device for connecting a drainage tube according to claim 1, characterized by The inner wall of the adjustable locking member (4) is provided with an extrusion platform, which is in contact with the upper and lower end surfaces of the elastic sealing member (2) during the tightening process, so as to convert the axial locking force into a radial compression force.

6. The air and liquid leakage preventing device for connecting a drainage tube according to claim 1, characterized by The inlet end surface of the drainage channel is chamfered, which is elastically connected with the drainage tube through chamfering, forming an anti-falling connection structure.

7. The air and liquid leakage preventing device for connecting a drainage tube according to claim 1, characterized by The adjustable locking member (4) is a sealing cover member, and the outer surface thereof is provided with anti-slip groove texture, forming a multi-groove strong friction structure.

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