Plastic two-way infusion connector connecting structure

Abstract

The utility model provides a plastic two-way infusion connector connecting structure which comprises a valve body, a first valve plate, a nut and a pressing cap, a second valve plate is arranged in the plastic two-way infusion connector connecting structure in an ultrasonic welding mode, one end of the pressing cap is fixed with the valve body in an ultrasonic welding mode, and the valve body, the nut and the pressing cap are all plastic pieces and are sequentially and fixedly connected in a plastic mode to form the product. The pressing cap, the second valve plate and the valve body are communicated to form a first liquid conveying channel, and liquid of the first liquid conveying channel enters from the pressing cap, enters the valve body through the second valve plate and flows out from the first connector. The valve body, the first valve plate and the nut are communicated to form a second liquid conveying channel, and liquid of the second liquid conveying channel enters from the first connector, passes through the first valve plate and flows out from the second connector. Transfusion in the two directions of suction and injection is achieved, especially liquid medicine delivery under certain pressure is achieved, and the pressure type infusion device is suitable for pressure type infusion.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical infusion connectors, and in particular relates to a plastic bidirectional infusion connector connection structure. Background Art

[0002] An infusion connector is a medical product used in medical infusion. It is generally used to connect an infusion pump or a syringe to deliver liquid medicine. Usually, the existing connector can only be used for infusion in one direction, and the use effect is relatively simple. In addition, the existing infusion connector is bonded by glue, which is not stable enough and is prone to leakage. In view of this, a connection connector structure that is more suitable for infusion is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a plastic two-way infusion connector connection structure to solve the problems raised in the above background technology.

[0004] In view of this, the utility model provides a plastic two-way infusion connector connection structure, comprising:

[0005] A valve body, having a first end and a second end, wherein the interior of the valve body is capable of allowing liquid to flow;

[0006] A first valve plate is ultrasonically welded to the inside of the first end of the valve body, and the second end includes a first connector, and the first connector is used to connect to a male connector;

[0007] Nut, the first end of the valve body is placed in the nut and sealed and fixed by ultrasonic welding, and the other end of the nut is a second connector for connecting to a female connector;

[0008] A pressure cap, inside of which a second valve plate is arranged by ultrasonic welding, one end of the pressure cap is fixed to the valve body by ultrasonic welding, and the other end is a third joint for connecting the pipeline;

[0009] The first infusion channel is formed by the connection between the pressure cap, the second valve sheet and the valve body, and the liquid in the first infusion channel flows into the pressure cap, passes through the second valve sheet, enters the valve body and flows out from the first joint;

[0010] A second liquid infusion channel is formed by the flow between the valve body, the first valve sheet and the nut, and the liquid in the second liquid infusion channel flows into the first joint, passes through the first valve sheet and flows out from the second joint;

[0011] Wherein, the valve body, nut and pressure cap are all plastic parts.

[0012] A further implementation scheme of the utility model is that the valve body has a valve seat, one end of the pressure cap is ultrasonically welded to the outside of the valve seat, a first infusion hole is opened in the center of the valve seat, and the first infusion hole connects the first connector, the second valve body and the pressure cap.

[0013] A further implementation scheme of the utility model is that a first convex rib is circumferentially arranged on the inner wall of the valve seat, the second valve plate is ultrasonically welded in the pressure cap, and the outer edge of the second valve plate is also ultrasonically welded to the inner edge of the first convex rib.

[0014] A further implementation scheme of the utility model is that a second convex rib is circumferentially provided on the inner wall of the first end of the valve body, and the outer edge of the first valve plate and the inner edge of the second convex rib are fixed by ultrasonic welding.

[0015] A further implementation scheme of the utility model is that a second infusion hole is opened in the nut, and the second infusion hole is connected to the first valve plate and the inside of the valve body.

[0016] A further implementation scheme of the utility model is that the first valve plate and the second valve plate are both one-way valve plates.

[0017] The beneficial effects of the utility model are:

[0018] The first valve sheet is ultrasonically welded in the first end of the valve body, the first end of the valve body and the nut are ultrasonically welded together, the second valve sheet is ultrasonically welded on the pressure cap and the pressure cap is ultrasonically welded to the valve body, the valve body, the nut and the pressure cap are all plastic parts, and multiple components are connected and fixed by ultrasonic welding, the first valve sheet and the second valve sheet both have a liquid check function, a unidirectional first infusion channel is formed between the pressure cap, the second valve sheet and the first connector, and a unidirectional second infusion channel is formed inside the valve body, the first valve sheet and the nut, the first valve sheet and the second valve sheet have different opening pressures, the male connector is connected to the first connector for suction to generate a positive opening pressure, so that the first infusion channel is opened to form an infusion passage, the liquid cannot pass through the first valve sheet, and the first valve sheet prevents the drug from flowing back; when injecting from the first connector, the drug pressure cannot pass through the second valve sheet, the first valve sheet is opened, so that the second infusion channel is opened to form an infusion passage, thereby realizing infusion in both directions of suction and injection, especially realizing the delivery of drug under a certain pressure, which is suitable for pressure-type infusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The explosion structure of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 2 The explosion structure of the utility model is shown in FIG. Figure 2 ;

[0021] Figure 3 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0023] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0025] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words 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 cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0026] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0027] See also Figure 1-Figure 3 This embodiment provides a plastic two-way infusion connector connection structure, including:

[0028] The valve body 1 has a first end 10 and a second end 11, and the interior of the valve body 1 is capable of allowing liquid to flow;

[0029] The first valve plate 2 is ultrasonically welded inside the first end 10 of the valve body 1. The second end 11 includes a first connector 110. The first connector 110 is used to connect to a male connector. Common male connectors include syringes and dosing pumps.

[0030] The nut 3, the first end 10 of the valve body 1 is placed in the nut 3 and sealed and fixed by ultrasonic welding, and the other end of the nut 3 is a second connector 30 for connecting with a female connector.

[0031] A pressure cap 4 is provided with a second valve plate 5 inside thereof by ultrasonic welding. One end of the pressure cap 4 is fixed to the valve body 1 by ultrasonic welding, and the other end is a third joint for connecting pipelines. General pipelines include infusion tubes and puncture devices, etc., wherein the valve body 1, nut 3 and pressure cap 4 are all plastic parts, and multiple plastic parts are connected and fixed into a T-shaped double unidirectional infusion connector by ultrasonic welding.

[0032] Preferably, the first valve disc 2 and the second valve disc 5 are both one-way valve discs. Under a certain pressure, the first valve disc 2 and the second valve disc 5 both have a check function, so the first valve disc 2 and the second valve disc 5 both have a one-way opening direction.

[0033] The first infusion channel A is formed by the connection between the pressure cap 4, the second valve plate 5 and the valve body 1. The liquid in the first infusion channel A flows into the pressure cap 4, enters the valve body 1 through the second valve plate 5 and flows out from the first joint 110.

[0034] The second infusion channel B is formed by the flow between the valve body 1, the first valve plate 2 and the nut 3. The liquid flow direction of the second infusion channel B enters from the first joint 110, passes through the first valve plate 2 and flows out from the second joint 30.

[0035] Therefore, under a certain pressure, the leaf directions of the first infusion channel A and the second infusion channel B are unidirectional, and the realization of the two infusion channels of suction and injection can be realized.

[0036] A further implementation scheme of the utility model is that the valve body 1 has a valve seat 12, one end of the pressure cap 4 is ultrasonically welded to the outside of the valve seat 12, and a first infusion hole 120 is opened in the center of the valve seat 12, and the first infusion hole 120 connects the first connector 110, the second valve body 1 and the pressure cap 4.

[0037] The inner wall of the valve seat 12 is circumferentially provided with a first convex rib 121, the second valve plate 5 is ultrasonically welded in the pressure cap 4, and the outer edge of the second valve plate 5 is also ultrasonically welded to the inner edge of the first convex rib 121. When the syringe or the dosing pump is docked with the first connector 110, positive pressure is generated by suction, at which time the second valve plate 5 is opened, and the drug liquid enters the valve body 1 from the third connector and finally enters the male connector from the first connector 110.

[0038] In this embodiment, a second rib 100 is circumferentially provided on the inner wall of the first end 10 of the valve body 1, and the outer edge of the first valve sheet 2 and the inner edge of the second rib 100 are fixed by ultrasonic welding. A second infusion hole 31 is opened in the nut 3, and the second infusion hole 31 connects the first valve sheet 2 and the interior of the valve body 1. When the male connector is connected to the first connector 110 for injection, the pressure of the drug liquid generated opens the first valve sheet 2, and the drug liquid enters the valve body 1 and passes through the first valve sheet 2 through the second infusion hole 31 and is infused from the second connector 30. At this time, the second valve sheet 5 does not flow back, thereby realizing infusion in both directions of suction and injection, and especially realizing the delivery of drug liquid under a certain pressure, which is suitable for pressure-type infusion.

[0039] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A plastic two-way infusion connector connection structure, comprising a valve body, characterized in that: The valve body has a first end and a second end, and the interior of the valve body is capable of allowing liquid to flow; A first valve plate is ultrasonically welded to the inside of the first end of the valve body, and the second end includes a first connector, and the first connector is used to connect to a male connector; Nut, the first end of the valve body is placed in the nut and sealed and fixed by ultrasonic welding, and the other end of the nut is a second connector for connecting to a female connector; A pressure cap, inside of which a second valve plate is arranged by ultrasonic welding, one end of the pressure cap is fixed to the valve body by ultrasonic welding, and the other end is a third joint for connecting the pipeline; The first infusion channel is formed by the connection between the pressure cap, the second valve sheet and the valve body, and the liquid in the first infusion channel flows into the pressure cap, passes through the second valve sheet, enters the valve body and flows out from the first joint; A second liquid infusion channel is formed by the flow between the valve body, the first valve sheet and the nut, and the liquid in the second liquid infusion channel flows into the first joint, passes through the first valve sheet and flows out from the second joint; Wherein, the valve body, nut and pressure cap are all plastic parts.

2. A plastic two-way infusion connector connection structure according to claim 1, characterized in that: The valve body has a valve seat, one end of the pressure cap is ultrasonically welded to the outside of the valve seat, a first infusion hole is opened in the center of the valve seat, and the first infusion hole is connected to the first connector, the second valve body and the pressure cap.

3. A plastic two-way infusion connector connection structure according to claim 2, characterized in that: The inner wall of the valve seat is circumferentially provided with a first convex rib, the second valve plate is ultrasonically welded in the pressure cap, and the outer edge of the second valve plate is also ultrasonically welded and fixed to the inner edge of the first convex rib.

4. A plastic two-way infusion connector connection structure according to claim 3, characterized in that: A second convex rib is circumferentially disposed on the inner wall of the first end of the valve body, and the outer edge of the first valve plate and the inner edge of the second convex rib are fixed by ultrasonic welding.

5. A plastic two-way infusion connector connection structure according to claim 4, characterized in that: A second infusion hole is provided in the nut, and the second infusion hole is connected with the first valve sheet and the interior of the valve body.

6. A plastic two-way infusion connector connection structure according to claim 1, characterized in that: The first valve plate and the second valve plate are both one-way valve plates.

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