Combined type airtight pipe sealing device

Abstract

The utility model discloses a combined type airtight tube sealing device, and belongs to the technical field of tube sealing injectors. Comprising an internal needle cylinder and an external needle cylinder which are provided with tubular inner cavities, a first leather plug is slidably connected into the tubular inner cavity of the external needle cylinder, a second leather plug is slidably connected into the tubular inner cavity of the internal needle cylinder, and the second leather plug is connected to a piston assembly; a normal saline cavity is formed between the first leather plug and the external needle cylinder, a heparin cavity is formed between the first leather plug and the second leather plug, a through hole communicated with the normal saline cavity and the heparin cavity is formed in the first leather plug, and a third leather plug is movably embedded in the through hole; a frustum is arranged on the bottom side of the tubular inner cavity of the external needle cylinder, and a conical head part is arranged at the bottom of the external needle cylinder; according to the combined type airtight tube sealing device provided by the utility model, a device for injecting normal saline and a device for injecting heparin tube sealing liquid are combined together, so that the tube sealing convenience of clinical nurses is improved, and the possibility of pollution caused in the liquid medicine suction process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tube-sealing syringes, and in particular relates to a combined airtight tube-sealing device. Background Art

[0002] Deep vein, PICC and medium and long venous catheters are now widely used in clinical practice. When using this type of catheter, it is necessary to use normal saline to seal the tube, and then use 0-10U / ml heparin sealing solution to seal the tube to ensure the patency of the tube. The 0-10U / ml heparin sealing solution used in clinical practice is mainly temporarily prepared by nurses and is used immediately. Before performing deep vein sealing for patients, clinical nurses need to temporarily draw 0-10U / ml heparin sealing solution, and need to carry a syringe of normal saline and a syringe with 0-10U / ml heparin sealing solution to the patient's bedside, and then perform pulse sealing in sequence.

[0003] During the entire sealing process, nurses need to temporarily prepare liquid medicine, which is inconvenient to carry. The prepared sealing liquid has a short shelf life and is easily contaminated. It cannot be used at will, which increases the workload of nurses and also poses a risk of drug contamination or cross-infection. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a combined airtight tube sealing device, which improves the convenience of tube sealing for clinical nurses and reduces the possibility of contamination during the process of aspirating liquid medicine by combining a device for injecting physiological saline with a device for injecting heparin tube sealing solution.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a combined closed tube sealing device, comprising an internal syringe and an external syringe with a tubular inner cavity, a first leather plug connected to the end of the internal syringe is slidably connected in the tubular inner cavity of the external syringe, a second leather plug is slidably connected in the tubular inner cavity of the internal syringe, and the second leather plug is connected to a piston assembly extending at one end to the outside of the internal syringe;

[0006] A saline cavity is formed between the first leather plug and the external syringe, a heparin cavity is formed between the first leather plug and the second leather plug, a through hole connecting the saline cavity and the heparin cavity is provided on the first leather plug, and a third leather plug capable of separating the saline cavity and the heparin cavity is movably embedded in the through hole;

[0007] A frustum capable of abutting against the third leather plug is arranged at the bottom side of the tubular inner cavity of the external syringe, and a conical head communicating with the physiological saline cavity is arranged at the bottom of the external syringe.

[0008] Optionally, a limiting top column capable of being plugged into and engaged with the third leather plug is provided on the frustum.

[0009] Optionally, the second leather plug is provided with a contoured groove capable of embedding the third leather plug.

[0010] Optionally, a chamfer is provided on one edge of the third plug facing the frustum.

[0011] Optionally, the tubular inner cavity opening ends of the external syringe and the internal syringe are provided with extended curling edges.

[0012] Optionally, the piston assembly includes a piston core rod connected to the second piston at one end, a folding plate symmetrically arranged along the piston core rod is inserted at the other end of the piston core rod, and a folding groove is symmetrically arranged on the folding plate along the piston core rod, and the folding plate can be folded along the folding groove;

[0013] The folded folding plate can be embedded in the tubular cavity of the built-in syringe, and the folding plate can be embedded on the extended curling edge of the built-in syringe.

[0014] Optionally, both ends of the folding plate are respectively provided with sheet-like boosting portions, and when the folding plate is folded along the folding groove, the two sheet-like boosting portions can be butted together to form a piston handle structure.

[0015] Optionally, the outer circumference of the built-in syringe and the piston core rod are both provided with a plurality of groups of reinforcing ribs arranged in a circular array, and the end of the reinforcing ribs on the built-in syringe can abut against the first leather plug, and the end of the reinforcing ribs on the piston core rod can abut against the second leather plug.

[0016] Optionally, the bottom of the external syringe is provided with an internal threaded connecting cap surrounding the outer periphery of the cone head.

[0017] Compared with the prior art, the utility model has the following beneficial effects: a saline cavity for storing saline is formed between the first leather plug and the external syringe, a heparin cavity for storing heparin tube-sealing liquid is formed between the first leather plug and the second leather plug, and the saline cavity and the heparin cavity are separated by the third leather plug. The internal syringe and the first leather plug form the piston rod structure of the external syringe, which is convenient for the external syringe to inhale and discharge saline to perform the first step of the saline tube-sealing operation. When the internal syringe and the first leather plug discharge saline, the third leather plug is pushed into the heparin cavity through the cone on the external syringe, so that the heparin cavity can be connected to the outside through the through hole, and finally, by pushing down the piston assembly, the second leather plug compresses the heparin tube-sealing liquid in the heparin cavity, and the heparin tube-sealing liquid can be discharged through the cone head, thereby completing the second step of the heparin tube-sealing liquid tube-sealing operation. This technical solution combines a device for injecting physiological saline with a device for injecting heparin sealing solution to construct a closed, sterile tube sealing device, which can improve the convenience of tube sealing for clinical nurses and reduce the possibility of contamination during the process of aspirating the drug solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural schematic diagram of a combined type airtight pipe sealing device in a preferred embodiment of the utility model;

[0020] Figure 2 In the preferred embodiment of the utility model Figure 1 Schematic diagram of the structure viewed from above;

[0021] Figure 3 In the preferred embodiment of the utility model Figure 2 Axonometric cross-sectional structural diagram from AA;

[0022] Figure 4 In the preferred embodiment of the utility model Figure 3 A schematic diagram of the local enlarged structure at B;

[0023] Figure 5 It is a structural schematic diagram of a preferred embodiment of the utility model when the first leather plug is installed on the built-in syringe;

[0024] Figure 6 It is a structural schematic diagram of the second leather plug installed on the piston assembly in the preferred embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the third leather plug in the preferred embodiment of the utility model;

[0026] Figure 8 It is a structural schematic diagram of the folding plate when it is folded in the preferred embodiment of the utility model;

[0027] Among them, 1. built-in syringe; 2. external syringe; 3. first leather plug; 301. through hole; 4. second leather plug; 401. contoured groove; 5. saline cavity; 6. heparin cavity; 7. third leather plug; 8. cone; 801. limit top column; 9. cone head; 10. extended curling edge; 11. piston core rod; 12. folding plate; 1201. folding groove; 1202. sheet-like booster; 13. reinforcing rib plate; 14. internal threaded connecting cap. DETAILED DESCRIPTION

[0028] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0029] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, the directional indication is only used to explain the relative position relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] like Figure 1-Figure 8 As shown, a combined closed tube sealing device comprises an internal syringe 1 and an external syringe 2 provided with a tubular inner cavity, a first leather plug 3 connected to the end of the internal syringe 1 is slidably connected in the tubular inner cavity of the external syringe 2, a second leather plug 4 is slidably connected in the tubular inner cavity of the internal syringe 1, and the second leather plug 4 is connected to a piston assembly extending to the outside of the internal syringe 1 at one end; wherein, a saline cavity 5 is formed between the first leather plug 3 and the external syringe 2, and a heparin cavity 6 is formed between the first leather plug 3 and the second leather plug 4, a through hole 301 connecting the saline cavity 5 and the heparin cavity 6 is provided on the first leather plug 3, and a third leather plug 7 capable of separating the saline cavity 5 and the heparin cavity 6 is movably embedded in the through hole 301; and a frustum 8 capable of abutting against the third leather plug 7 is provided on the bottom side of the tubular inner cavity of the external syringe 2, and a conical head 9 connected to the saline cavity 5 is provided at the bottom of the external syringe 2.

[0031] Specifically, the heparin cavity 6 can be sealed by a third leather plug 7 and store the heparin sealing solution. Figure 4 As shown, when the cone head 9 is coaxially arranged with the cone 8, holes arranged in a circular array can be opened at the bottom of the tubular inner cavity of the external syringe 2 around the cone 8, so that the saline and heparin sealing liquid can be discharged from the cone head 9. When in use, the internal syringe 1 cooperates with the first leather plug 3 to form a piston rod structure. By pulling the internal syringe 1, the external syringe 2 can suck saline from the outside into the saline cavity 5 through the cone head 9. The external syringe 2 can be connected to a catheter such as a deep vein, PICC or a medium-long catheter through the cone head 9. By pressing down the internal syringe 1, the first leather plug 3 at the end of the internal syringe 1 gradually approaches the cone 8 on the bottom side of the tubular inner cavity of the external syringe 2, compressing the saline in the saline cavity 5, so that the saline flows through the cone head 9, the deep vein, the PICC or the medium-long catheter, and the first step of the saline sealing operation is completed. Subsequently, the built-in syringe 1 is pushed down continuously, and the residual saline in the saline cavity 5 will continue to be discharged outwardly, and the cone 8 will slowly push the third plug 7 into the heparin cavity 6 until the third plug 7 is detached from the first plug 3, so that the heparin cavity 6 is connected with the cone head 9 through the through hole 301, and then the piston assembly is pushed down again to make the second plug 4 compress the heparin sealing liquid in the heparin cavity 6, so that the heparin sealing liquid flows through the deep vein, PICC or medium and long catheter and other catheters through the cone head 9, completing the second step of the heparin sealing liquid sealing operation.

[0032] As mentioned above, in the second step of the heparin sealing liquid tube sealing operation, a portion of physiological saline will be stored in the through hole 301 on the first leather plug 3. When the heparin cavity 6 is connected with the through hole 301, this portion of physiological saline will be mixed into the heparin sealing liquid. However, since the heparin sealing liquid is mainly made by mixing 12500 units of heparin sodium and physiological saline in a certain ratio, this portion of physiological saline will not affect the sealing effect of the heparin sealing liquid.

[0033] In the technical solution, a closed and sterile tube sealing device is constructed by combining a device for injecting physiological saline with a device for injecting heparin tube sealing liquid. After the first tube sealing operation is performed using physiological saline, the heparin tube sealing liquid in the heparin cavity 6 can be immediately compressed by the piston assembly, so that the heparin tube sealing liquid in the heparin cavity 6 is injected into the patient's catheter through the cone head 9, achieving the purpose of tube sealing, improving the convenience of tube sealing for clinical nurses, and reducing the possibility of contamination during the process of aspirating the liquid medicine.

[0034] Furthermore, in order to prevent the third leather plug 7 from floating arbitrarily in the heparin cavity 6 and hinder the second leather plug 4 from discharging the heparin sealing liquid in the heparin cavity 6, as shown in FIG. Figure 3 , Figure 4 , Figure 7As shown, the cone 8 is provided with a limiting top post 801 that can be plugged with the third plug 7. When the third plug 7 abuts against the cone 8, the limiting top post 801 on the cone 8 will gradually be inserted into the third plug 7. Specifically, a positioning groove that does not penetrate the third plug 7 is provided at a position corresponding to the limiting top post 801 on the third plug 7. There is a certain damping feeling between the third plug 7 and the positioning groove, which can prevent the third plug 7 from detaching from the limiting top post 801, and never prevent the third plug 7 from floating arbitrarily in the heparin cavity 6.

[0035] Further, such as Figure 3 , Figure 6 As shown, the second leather plug 4 is provided with a contoured groove 401 capable of embedding the third leather plug 7. When the second leather plug 4 gradually approaches the bottom of the heparin cavity 6, the third leather plug 7 pushed into the heparin cavity 6 by the cone 8 can be embedded in the contoured groove 401 on the second leather plug 4, thereby reducing the volume of the heparin cavity 6 and reducing the residual heparin sealing liquid in the heparin cavity 6.

[0036] The above, such as Figure 3 , Figure 7 As shown, the edge of the third plug 7 facing the cone 8 is chamfered to expand the gap between the third plug 7 and the edge of the through hole 301, so as to facilitate the heparin sealing liquid to pass through the gap between the third plug 7 and the edge of the through hole 301.

[0037] Further, such as Figure 1 , Figure 8 As shown, the tubular inner cavity opening ends of the external syringe 2 and the internal syringe 1 are provided with an extended curling edge 10 to facilitate the operator to hold the syringe in hand.

[0038] Further, such as Figure 1 , Figure 3 , Figure 6 As shown, the piston assembly includes a piston core rod 11 connected to the second leather plug 4 at one end, and a folding plate 12 symmetrically arranged along the piston core rod 11 is inserted at the other end of the piston core rod 11, and a folding groove 1201 is symmetrically arranged on the folding plate 12 along the piston core rod 11, and the folding plate 12 can be folded along the folding groove 1201; wherein, the folded folding plate 12 can be embedded in the tubular cavity of the built-in syringe 1, and the folding plate 12 can be embedded on the outer extension curling edge 10 of the built-in syringe 1. The piston assembly adopts a double folding structure design and can be combined with the built-in syringe 1, so that the combination of the built-in syringe 1 and the piston assembly is more concise and convenient for operators to operate. At the same time, in this technical solution, when the folding plate 12 is flattened and embedded on the outer extension curling edge 10, a heparin cavity 6 with a quantitative volume can be formed between the second leather plug 4 and the first leather plug 3 at the end of the built-in syringe 1. This prevents the operator from accidentally touching the piston core rod 11 when injecting saline into the catheter.

[0039] The above, such as Figure 1 , Figure 8As shown, the two ends of the folding plate 12 are respectively provided with a sheet-like boosting part 1202, and when the folding plate 12 is folded along the folding groove 1201, the two sheet-like boosting parts 1202 can be butted together to form a piston handle structure, so as to increase the contact area between the operator's finger end and the folding plate 12, and facilitate the operator to use. In this technical solution, in order to ensure that the two sheet-like boosting parts 1202 can remain stable after being butted together, a clamping structure can be provided on one side of the two sheet-like boosting parts 1202 that abut against each other.

[0040] Further, if Figure 5 , Figure 6 As shown, the outer circumference of the built-in syringe 1 and the piston core rod 11 are both provided with a plurality of groups of reinforcing ribs 13 arranged in a circumferential array, and the end of the reinforcing rib 13 on the built-in syringe 1 can abut against the first leather plug 3, and the end of the reinforcing rib 13 on the piston core rod 11 can abut against the second leather plug 4, and the strength of the built-in syringe 1 and the piston core rod 11 can be increased by the reinforcing rib 13. At the same time, the reinforcing rib 13 can also play a certain supporting role when the first leather plug 3 and the second leather plug 4 slide relative to the tubular inner cavity of the external syringe 2 and the built-in syringe 1, reduce the deformation of the first leather plug 3 and the second leather plug 4, and ensure that the first leather plug 3 and the second leather plug 4 are closely attached to the inner wall of the tubular inner cavity.

[0041] Furthermore, an internal threaded connection cap 14 is provided at the bottom of the external syringe 2 and is arranged around the outer periphery of the cone head 9, so that when the cone head 9 is docked with a catheter such as a deep vein, PICC or a medium-length catheter, the external syringe 2 can be prevented from being dislocated by means of a threaded connection, which is convenient for clinical nurses to operate.

[0042] Working principle: The external syringe 2 can be connected to a catheter such as a deep vein, PICC or a medium-long catheter through the cone head 9, so that the physiological saline cavity 5 and the heparin cavity 6 can be connected to the catheter. At the same time, the heparin cavity 6 can be sealed and stored with the third leather plug 7. By pulling the internal syringe 1, the external syringe 2 can draw physiological saline from the outside into the physiological saline cavity 5 through the cone head 9, and the physiological saline can also be injected into the catheter to perform the first step of the physiological saline sealing operation. At the same time, when the internal syringe 1 is pressed down to introduce the physiological saline into the catheter, the cone 8 can push the third leather plug 7 into the heparin cavity 6. After the physiological saline is discharged, the heparin cavity 6 can be connected with the cone head 9 through the through hole 301. At this time, by pushing down the piston assembly, the heparin sealing liquid can be brought into the catheter through the cone head 9, completing the second step of the heparin sealing liquid sealing operation. This technical solution combines the device for injecting physiological saline with the device for injecting heparin sealing liquid to construct a closed and sterile sealing device. After the first step of tube sealing operation using normal saline, the heparin tube sealing liquid in the heparin chamber 6 can be immediately compressed by the piston assembly, so that the heparin tube sealing liquid in the heparin chamber 6 is injected into the patient's catheter through the cone head 9, thereby achieving the purpose of tube sealing, improving the convenience of tube sealing for clinical nurses, and reducing the possibility of contamination during the process of aspirating the drug solution.

[0043] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A combined sealed pipe sealing device, characterized in that: It comprises an internal syringe (1) and an external syringe (2) each having a tubular inner cavity, wherein a first leather plug (3) connected to the end of the internal syringe (1) is slidably connected in the tubular inner cavity of the external syringe (2), and a second leather plug (4) is slidably connected in the tubular inner cavity of the internal syringe (1), and the second leather plug (4) is connected to a piston assembly extending at one end to the outside of the internal syringe (1); A physiological saline cavity (5) is formed between the first leather plug (3) and the external syringe (2), and a heparin cavity (6) is formed between the first leather plug (3) and the second leather plug (4). The first leather plug (3) is provided with a through hole (301) connecting the physiological saline cavity (5) and the heparin cavity (6), and a third leather plug (7) capable of separating the physiological saline cavity (5) and the heparin cavity (6) is movably embedded in the through hole (301); The bottom side of the tubular inner cavity of the external syringe (2) is provided with a frustum (8) capable of abutting against the third leather plug (7), and the bottom of the external syringe (2) is provided with a conical head (9) connected to the physiological saline cavity (5).

2. The combined airtight pipe sealing device according to claim 1, characterized in that: The frustum (8) is provided with a limiting top column (801) capable of being plugged into and matched with the third leather plug (7).

3. The combined airtight pipe sealing device according to claim 1, characterized in that: The second leather plug (4) is provided with a contoured groove (401) capable of being embedded in the third leather plug (7).

4. The combined airtight pipe sealing device according to claim 1, characterized in that: A chamfer is provided on one side edge of the third plug (7) facing the frustum (8).

5. The combined airtight pipe sealing device according to claim 1, characterized in that: The tubular inner cavity opening ends of the external syringe (2) and the internal syringe (1) are provided with an extended curling edge (10).

6. The combined airtight pipe sealing device according to claim 5, characterized in that: The piston assembly comprises a piston core rod (11) having one end connected to the second piston (4); the other end of the piston core rod (11) is plugged with a folding plate (12) symmetrically arranged along the piston core rod (11); the folding plate (12) has folding grooves (1201) symmetrically arranged along the piston core rod (11); and the folding plate (12) can be folded along the folding grooves (1201); The folded folding plate (12) can be embedded in the tubular cavity of the built-in syringe (1), and the folding plate (12) can be embedded on the extended curling edge (10) of the built-in syringe (1).

7. The combined airtight pipe sealing device according to claim 6, characterized in that: Both ends of the folding plate (12) are respectively provided with sheet-like boosting portions (1202), and when the folding plate (12) is folded along the folding groove (1201), the two sheet-like boosting portions (1202) can be butted together to form a piston handle structure.

8. The combined airtight pipe sealing device according to claim 6, characterized in that: The outer circumferences of the built-in syringe (1) and the piston core rod (11) are both provided with a plurality of groups of reinforcing ribs (13) arranged in a circular array, and the ends of the reinforcing ribs (13) on the built-in syringe (1) can abut against the first leather plug (3), and the ends of the reinforcing ribs (13) on the piston core rod (11) can abut against the second leather plug (4).

9. The combined airtight pipe sealing device according to claim 6, characterized in that: The bottom of the external syringe (2) is provided with an internal thread connection cap (14) arranged around the outer circumference of the cone head (9).

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