CN116570831B - Quick joint for catheter - Google Patents
Quick joint for catheter Download PDFInfo
- Publication number
- CN116570831B CN116570831B CN202310796720.2A CN202310796720A CN116570831B CN 116570831 B CN116570831 B CN 116570831B CN 202310796720 A CN202310796720 A CN 202310796720A CN 116570831 B CN116570831 B CN 116570831B
- Authority
- CN
- China
- Prior art keywords
- connector
- piece
- base
- connecting component
- fastening piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 239000000741 silica gel Substances 0.000 claims description 25
- 229910002027 silica gel Inorganic materials 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 229960000074 biopharmaceutical Drugs 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000003814 drug Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 2
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229960002897 heparin Drugs 0.000 description 2
- 229920000669 heparin Polymers 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000004819 Drying adhesive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M39/1011—Locking means for securing connection; Additional tamper safeties
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M39/105—Multi-channel connectors or couplings, e.g. for connecting multi-lumen tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M2039/1033—Swivel nut connectors, e.g. threaded connectors, bayonet-connectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M2039/1038—Union screw connectors, e.g. hollow screw or sleeve having external threads
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M2039/1066—Tube connectors; Tube couplings having protection means, e.g. sliding sleeve to protect connector itself, shrouds to protect a needle present in the connector, protective housing, isolating sheath
Abstract
The invention discloses a catheter quick connector, which relates to the technical field of catheter connectors and comprises an upper connector and a lower connector, wherein the upper connector comprises an upper connecting component, an upper expansion piece and an upper fastening piece; the upper expansion piece is sleeved on the upper connecting component, the upper fastening piece is sleeved on the upper expansion piece, and the upper fastening piece is in threaded connection with the upper connecting component; the lower joint comprises a lower connecting assembly, a lower expansion piece and a lower fastening piece; the lower expansion piece is sleeved on the lower connecting component, the lower fastening piece is sleeved on the lower expansion piece, and the lower fastening piece is in threaded connection with the lower connecting component; the upper connecting component is connected with the lower connecting component. According to the invention, the upper and lower expansion pieces are arranged to apply a fixed strength to the guide pipe through interference from the inside of the guide pipe, and simultaneously, the upper and lower fastening pieces are combined to apply a fixed strength to the guide pipe through interference from the outside of the guide pipe, so that the intervention of glue is avoided, the pollution of the glue to a product in the bio-pharmaceutical process is avoided, and the problem that the adhesive property of the glue is reduced due to long-term storage of the product is solved.
Description
Technical Field
The invention relates to the technical field of catheter connectors, in particular to a catheter quick connector.
Background
Disposable consumables have wide application in biopharmaceutical processes and end product storage, and their compatibility with loaded drugs has always been a major concern for pharmaceutical factories. The main part and spare and accessory parts of the consumable material generally all choose relatively stable polymer materials, but various solvents and glue are inevitably used for connection among the spare and accessory parts, and harmful micromolecule substances in the components pollute medicines. Meanwhile, the reliability of the glue is low, and inherent connection force and sealing performance cannot be stably maintained in the effective period of the product. The auxiliary materials can be filled into the temporary dosing port by using some connecting pieces when needed, so that excessive residues are avoided because liquid is leaked into the pipeline above the main runner, the liquid stopping clamp on the pipeline is generally closed and then is subjected to liquid filling operation, the process becomes complicated by one-step operation, and once the liquid stopping clamp is forgotten to be closed, the auxiliary materials are remained excessively, so that the auxiliary materials in the medicine are insufficient, and finished medicine in the process is scrapped to cause loss to a medicine enterprise. As the storage consumptive material of bio-pharmaceuticals finished product medicament, some needs put into liquid nitrogen after the filling is accomplished and freeze to preserve, can not exist the bubble in the bag body in such low temperature environment, so can carry out the exhaust operation usually after the filling is accomplished, current consumptive material is generally all directly opened the pipeline terminal joint or connect a syringe and take out the core bar and exhaust while connecting the department at the joint, this operation process is unavoidable to make the liquid medicine in the container contact external environment, and most pharmaceutical company's production environment is B level or C level (can't reach real aseptic environment), the risk of cross contamination can't be controlled.
Chinese patent publication No. CN106031807a discloses a needle-free connector module comprising: a flow guiding seat, the periphery of which comprises an ultrasonic welding part; the elastic valve body is arranged on the upper seat part of the flow guiding seat and sleeved on the flow guiding pipe of the upper seat part; and a sleeve, the upper part of the inner wall of a sleeve base of the sleeve is provided with an inner ring bottom plane, the inner ring bottom plane is contracted inwards relative to the sleeve base, the inner wall of the sleeve base defines an annular wall limiting part, wherein the sleeve is sleeved outside the elastic valve body and is assembled with the flow guiding seat, so that the inner ring bottom plane contacts with the ultrasonic welding part, and the annular wall limiting part is attached to one side part of a seat body of the flow guiding seat, so that the sleeve can be firmly arranged on the flow guiding seat. The Chinese patent with the publication number of CN204017143U discloses an anti-countercurrent positive pressure connector, which comprises a shell with an inner cavity, a large silica gel plug and a base, wherein the cross section of the shell is elliptical, the large silica gel plug is of a hollow cylindrical structure with a closed head end, a cavity at the tail end of the large silica gel plug is arranged on a bulge at the head end of the base and is tightly attached to the bulge, the large silica gel plug slides left and right in the shell during use, the fluidity of liquid is influenced, the shell is connected with the base by adopting ultrasonic welding, and an anti-countercurrent side branch pipe connected with the hollow inner cavity of the shell is arranged on the side wall of the shell. However, the above patent still has the problems of high use cost, environmental pollution, low working efficiency caused by the fact that a plurality of joints cannot be used simultaneously for common operation, and the like.
Disclosure of Invention
The invention provides a catheter quick connector aiming at the problems existing in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a catheter quick connector comprises an upper connector and a lower connector, wherein the upper connector comprises an upper connecting component, an upper expansion piece and an upper fastening piece; the upper expansion piece is sleeved on the upper connecting component, the upper fastening piece is sleeved on the upper expansion piece, and the upper fastening piece is in threaded connection with the upper connecting component; the lower joint comprises a lower connecting assembly, a lower expansion piece and a lower fastening piece; the lower expansion piece is sleeved on the lower connecting component, the lower fastening piece is sleeved on the lower expansion piece, and the lower fastening piece is in threaded connection with the lower connecting component; the upper connecting component is connected with the lower connecting component.
Based on the technical scheme, still further, go up coupling assembling and by last connecting portion, last screw thread portion and last base, and last connecting portion, last screw thread portion and last base detachable connection or integrated into one piece, go up connecting portion, go up screw thread portion and go up the inside through-hole that all is equipped with of base, and go up connecting portion, last screw thread portion and last base's through-hole intercommunication.
Based on the above technical scheme, still further, the external diameter of upper connecting portion is less than the external diameter of upper screw portion, and the external diameter of upper screw portion is less than the external diameter of upper base.
Based on the above technical scheme, still further, go up the extension piece and be equipped with two at least blades, blade bottom integrated into one piece just encloses to establish into a mounting hole, and the through-hole intercommunication of coupling assembling is gone up to the mounting hole, and blade tip mutually independent sets up, and the inner wall of blade bottom is equipped with deformation back-off, and deformation back-off is fixed with the cooperation of the last connecting portion or the lower connecting portion that correspond. Specifically, the outer surface of the upper connecting part is provided with a convex part, and the end face of the bottom of the blade is buckled with the end face of the convex part.
Based on the technical scheme, furthermore, the fixed orifices has been seted up to the inside fixed orifices that has gone up of fastener, and fixed orifices and mounting hole, the through-hole intercommunication of last connecting portion, and the inner wall of fixed orifices is equipped with the helicitic texture, goes up the external screw thread cooperation of fastener through helicitic texture and last screw thread portion.
Based on the technical scheme, further, the outer surfaces of the upper fastening piece and the lower fastening piece are provided with anti-skid grooves.
Based on the technical scheme, further, the inner diameter of the lower end of the upper expansion piece is equal to the outer diameter of the upper connecting part, and the outer diameter of the lower end of the upper expansion piece is 0.05-0.1mm larger than the inner diameter of the required assembly catheter.
Based on the above technical scheme, still further, lower coupling assembling is by lower connecting portion, lower screw thread portion, connecting body and lower base, and connecting portion, lower screw thread portion, connecting body and lower base connect in order, and connecting portion, lower screw thread portion, connecting body and lower base are inside all to be equipped with the through-hole, and lower connecting portion, lower screw thread portion, connecting body and lower base's through-hole intercommunication.
Based on the above technical scheme, still further, the outside of connecting the main part outwards extends and is equipped with two at least and connects the end, and two connect the inside through-hole intercommunication of end and connecting the main part, and the passageway one end structure of intercommunication is luer internal cone structure.
Based on the technical scheme, the connector end further comprises an exhaust connector, one end of the exhaust connector is of a luer outer cone structure, the other end of the exhaust connector is welded with an exhaust membrane, and the aperture of the exhaust membrane is 0.1-0.22 mu m.
Based on the above technical scheme, still further, the expansion piece is equipped with two at least blades down, and blade bottom integrated into one piece just encloses to establish into a mounting hole, and the mounting hole communicates with coupling assembling's through-hole down, and the blade tip mutually independent sets up, and the inner wall of blade bottom is equipped with deformation back-off, and deformation back-off is fixed with lower coupling assembling cooperation. Specifically, the outer surface of the lower connecting part is provided with a convex part, and the end surface of the bottom of the blade is buckled with the end surface of the convex part.
Based on the technical scheme, furthermore, the fixed orifices has been seted up to fastener inside down, and the fixed orifices communicates with mounting hole, the through-hole of lower connecting portion, and the inner wall of fixed orifices is equipped with the helicitic texture, and the fastener passes through the helicitic texture and the external screw thread cooperation of lower helicitic texture down.
Based on the technical scheme, still further, still be equipped with the silica gel pad, in the cavity that the position that upper joint subassembly and lower joint subassembly are connected formed was located to the silica gel pad, and the external diameter of silica gel pad is greater than liquid channel diameter L in the upper base, and the external diameter of silica gel pad is less than the internal diameter H of base one end cavity.
Based on the technical scheme, furthermore, the inside sealing rib that is equipped with of upper base, and install a plurality of spacing portion on the upper base inner wall, install the silica gel pad between sealing rib and the spacing portion.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, the upper and lower expansion pieces are arranged to apply a fixing strength to the guide pipe through interference from the inside of the guide pipe, and simultaneously, the upper and lower fastening pieces are combined to apply a fixing strength to the guide pipe through interference from the outside of the guide pipe, so that the connection strength between the guide pipe and the joint can reach more than 100N, the connection strength in the modes of far-ultra quick-drying glue or UV glue and the like is realized through a physical structure, the whole assembly is realized through a physical structure, the intervention of glue is thoroughly avoided, the pollution of the glue to a product in the bio-pharmaceutical process is avoided, and the problem of reduced glue bonding performance caused by long-term storage of the product is solved.
(2) The invention can be provided with a plurality of joint ends, namely a plurality of dosing ports can be connected, the dosing ports are designed as luer inner cones, one dosing port can be connected with fittings such as heparin caps, needleless joints and the like to realize different dosing modes, the other dosing port is connected with an outer cone, one end of the outer cone is welded with a PTFE hydrophobic exhaust film with the aperture of 0.1-0.22 mu m, and after dosing or liquid feeding through a quick joint is completed, gas in the bag body can be discharged through the exhaust film, so that pollution caused by contact of liquid in the bag with the external environment is avoided.
(3) According to the invention, the sealing rib is arranged in the upper base, the group of supporting parts are arranged in the lower base, the silica gel pad is arranged between the upper base and the lower base, the supporting parts are used for supporting the silica gel pad, when the medicine is added from the medicine adding port of the quick connector, the silica gel pad is propped against the sealing rib of the upper base (the upper channel is closed) by the liquid to avoid liquid channeling, the liquid can quickly flow to the designated passage without additional operation, and the liquid is prevented from remaining in other passages.
(4) The invention sleeves the catheter into the conical upper expansion piece, the interference of the bottom end of the upper expansion piece is 0.05-0.1mm compared with the inner diameter of the catheter, the upper expansion piece is sleeved into the upper connecting part (the outer diameter of the upper connecting part is consistent with the inner diameter of the upper expansion piece), in the process, a plurality of expansion blades of the upper expansion piece are expanded by the upper connecting part, and then the catheter is expanded to form an integral interference fit state with the upper expansion piece. And meanwhile, the deformation back-off of the inner wall of the lower expansion piece is clamped and fixed with the convex rib on the lower cover connecting rod. And finally, sleeving the lower fastening piece on the guide pipe, and screwing the threads of the inner ring of the lower fastening piece with the threads of the upper end of the lower cover connecting rod, wherein the size of the inner hole of the lower fastening piece is consistent with the outer diameter of the guide pipe. After the assembly is completed, the lower expansion piece applies a fixed strength to the guide pipe through interference from the inside of the guide pipe, and meanwhile, the lower fastening piece applies a fixed strength to the guide pipe through interference from the outside of the guide pipe, so that the connection strength between the guide pipe and the connector can reach more than 100N through double fixing, and the connection strength of modes such as far ultra quick-drying adhesive or UV adhesive can be realized.
Drawings
FIG. 1 is a schematic view of the overall structure of a quick connector according to the present invention;
FIG. 2 is a cross-sectional view of the quick connector of the present invention;
FIG. 3 is a schematic view of the structure of the fastener of the present invention;
FIG. 4 is a schematic view of the upper base of the present invention;
FIG. 5 is a schematic view of the structure of the lower base of the present invention;
FIG. 6 is a schematic view of the structure of the upper or lower extender of the present invention in a closed state;
FIG. 7 is a schematic view of the structure of the upper or lower extender of the present invention in an expanded state;
reference numerals: 1. an upper connection assembly; 2. an upper expansion member; 3. a fastening piece is arranged; 4. a lower connection assembly; 5. a lower expansion member; 6. a lower fastener; 7. an upper connection part; 8. an upper thread portion; 9. an upper base; 10. a blade; 11. deformation back-off; 12. convex ribs; 13. an anti-skid groove; 14. a lower connecting part; 15. a lower thread portion; 16. a connecting body; 17. a lower base; 18. an exhaust joint; 19. a needleless connector; 20. a silica gel pad; 21. sealing ribs; 22. a limit part; 23. a support part; 24. a catheter.
Detailed Description
The invention is further illustrated and described below with reference to the drawings and detailed description. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict.
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict. In the description of the present invention, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected with intervening elements present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
Example 1
As shown in fig. 1-7, a catheter quick connector comprises an upper connector and a lower connector, wherein the upper connector comprises an upper connecting assembly 1, an upper expanding piece 2 and an upper fastening piece 3; the upper expansion piece 2 is sleeved on the upper connecting component 1, the upper fastening piece 3 is sleeved on the upper expansion piece 2, and the upper fastening piece 3 is in threaded connection with the upper connecting component; the lower joint comprises a lower connecting assembly 4, a lower expansion piece 5 and a lower fastening piece 6; the lower expansion piece 5 is sleeved on the lower connecting component 4, the lower fastening piece 6 is sleeved on the lower expansion piece 5, and the lower fastening piece 6 is in threaded connection with the lower connecting component; the upper and lower connection assemblies 1 and 4 may be connected by welding, wherein the upper and lower expansion members 2 and 5 are identical in structure, and the upper and lower fastening members 3 and 6 are identical in structure.
Specifically, the upper connection assembly 1 includes an upper connection portion 7, an upper threaded portion 8 and an upper base 9, and the upper connection portion 7, the upper threaded portion 8 and the upper base 9 are sequentially detachably connected or integrally formed, through holes are formed in the upper connection portion 7, the upper threaded portion 8 and the upper base 9, and the through holes of the upper connection portion 7, the upper threaded portion 8 and the upper base 9 are communicated. The outer diameter of the upper connecting part 7 is smaller than that of the upper threaded part 8, and the outer diameter of the upper threaded part 8 is smaller than that of the upper base 9. The upper expansion piece 2 is provided with at least two blades 10, the blades 10 are of conical structures, the opening and closing actions of the blades 10 are facilitated, the bottoms of the blades 10 are integrally formed and are surrounded to form a mounting hole, the mounting hole is communicated with a through hole of the upper connecting assembly 1, the end parts of the blades 10 are mutually independent, deformation back-off 11 is arranged on the inner wall of the bottom of the blades 10, and the deformation back-off 11 is fixedly matched with the upper connecting portion 7. Specifically, a convex rib 12 is arranged on the outer surface of the upper connecting portion 7, and the deformation inverted buckle 11 of the inner wall of the blade 10 is matched with the convex rib 12. The fixing hole is formed in the upper fastening piece 3, the fixing hole is communicated with the mounting hole and the through hole of the upper connecting portion 7, a thread structure is arranged on the inner wall of the fixing hole, and the upper fastening piece 3 is matched with the external thread of the upper thread portion 8 through the thread structure. The outer surfaces of the upper fastening piece 3 and the lower fastening piece 6 are provided with anti-slip grooves 13. The inner diameter of the lower end of the upper expansion piece 2 is equal to the outer diameter of the upper connecting part 7, and the outer diameter of the lower end of the upper expansion piece 5 is 0.05-0.1mm larger than the inner diameter of the required assembly conduit 24. The lower connection assembly 4 comprises a lower connection part 14, a lower threaded part 15, a connection main body 16 and a lower base 17, wherein the lower connection part 14, the lower threaded part 15, the connection main body 16 and the lower base 17 are sequentially connected, through holes are formed in the lower connection part 14, the lower threaded part 15, the connection main body 16 and the lower base 17, and the through holes of the lower connection part 14, the lower threaded part 15, the connection main body 16 and the lower base 17 are communicated. The outside of the connecting main body 16 is provided with at least two connector ends in an outward extending way, the inside of the two connector ends is communicated with the inside through hole of the connecting main body 16, and one end structure of the communicated channel is a luer inner cone structure. The joint end comprises an exhaust joint 18, one end of the exhaust joint 18 is of a luer outer cone structure, the other end of the exhaust joint is welded with an exhaust membrane, and the aperture range of the exhaust membrane is 0.1-0.22 mu m. The lower expansion piece 5 is provided with at least two blades 10, the bottom of each blade 10 is integrally formed and is surrounded to form a mounting hole, the mounting hole is communicated with a through hole of the lower connecting component 4, the end parts of the blades 10 are mutually independent, the inner wall of the bottom of each blade 10 is provided with a deformation back-off 11, and the deformation back-off 11 is matched and fixed with the lower connecting part 14. Wherein, a convex rib 12 is arranged on the outer surface of the lower connecting part 14, and the deformation back-off 11 on the inner wall of the blade 10 is buckled with the convex rib 12. The inside fixed orifices that has seted up of fastener 6 down, fixed orifices and mounting hole, the through-hole intercommunication of lower connecting portion 14, and the inner wall of fixed orifices is equipped with the helicitic texture, and fastener 6 passes through the helicitic texture and the external screw thread cooperation of lower screw thread portion 15 down. The silica gel pad 20 is arranged in a cavity formed by the connection position of the upper joint assembly and the lower joint assembly, the outer diameter of the silica gel pad 20 is larger than the diameter L of the liquid channel in the upper base 9, and the outer diameter of the silica gel pad 20 is smaller than the inner diameter H of the cavity at one end of the base. The inside sealing rib 21 that is equipped with of upper base 9, and install a plurality of spacing portion 22 on the upper base 9 inner wall, install silica gel pad 20 between sealing rib 21 and the spacing portion 22. The lower base 17 is internally provided with a supporting part 23, and the supporting part 23 is used for supporting the silica gel pad 20 contacted with the supporting part.
The working principle of the joint is as follows: the upper connecting assembly 1 is provided with an upper connecting part 7 at one end, the outer diameter of the upper connecting part 7 is smaller than the inner diameter of a conduit 24 to be connected, the conduit 24 is penetrated into an inner hole of an upper fastening piece 3 during assembly, one end of the conduit 24 to be connected is externally inserted into the upper expanding piece 2, the end of the conduit 24 is flush with the bottom end of the upper expanding piece 2, the upper expanding piece 2 assembled with the conduit 24 is sleeved into the upper connecting part 7 from the lower end and pushed upwards until a deformation back-off 11 inside the upper expanding piece 2 is clamped and fixed with a convex rib 12 at the upper end of the upper connecting part 7, and in the process, three expandable thin blades 10 of the upper expanding piece 2 are propped open by the upper connecting part 7, so that the inner hole of the conduit 24 and an upper base 9 form interference connection. And finally, screwing and fixing the upper fastening piece 3 and the threads of the upper threaded part 8, so that the outer wall of the guide pipe 24 and the upper fastening piece 3 form interference connection. One end of the lower joint is of the same structural design, so that the pipes 24 of different materials are connected. The upper base 9 is internally provided with a cavity, a circle of sealing ribs 21 are arranged in the cavity, the lower base 17 is internally provided with a circle of supporting parts 23, the cavity of the upper base 9 and the cavity of the lower base 17 are connected to form a cavity, and a silica gel pad 20 is placed in the cavity. Two channels are respectively arranged on two sides of the connecting main body 16, the inside of each channel is communicated with the main flow channel of the connecting main body 16, one end of each channel on two sides is of a luer inner cone structure design, and one channel can be connected with a needleless connector 19 or a heparin cap to serve as a temporary dosing channel. The other channel is connected with an exhaust protective cap, and a hydrophobic exhaust film with the aperture range of 0.1-0.22 mu m is welded on the exhaust protective cap. When the temporary dosing is needed, liquid can flow into the exhaust channel and the upper channel of the connecting main body 16, the exhaust channel is blocked by an exhaust film, and the liquid in the upper channel of the connecting main body 16 props the silica gel pad 20 against the sealing rib 21 in the upper base 9 to close the channel, so that the liquid is prevented from continuously flowing upwards to form a channeling cavity in a countercurrent way. After the liquid filling is completed, the gas in the bag body can be discharged through the channel with the exhaust protective cap, and meanwhile, the 0.22 mu m filter can prevent bacteria and microorganisms from entering the bag body to pollute the liquid medicine.
Finally, it should be noted that the above description is only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and that the simple modification and equivalent substitution of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present invention.
Claims (8)
1. A catheter quick connector is characterized by comprising an upper connector and a lower connector,
the upper joint comprises an upper connecting assembly, an upper expanding piece and an upper fastening piece; the upper expansion piece is sleeved on the upper connecting component, the upper fastening piece is sleeved on the upper expansion piece, and the upper fastening piece is in threaded connection with the upper connecting component;
the lower joint comprises a lower connecting assembly, a lower expansion piece and a lower fastening piece; the lower expansion piece is sleeved on the lower connecting component, the lower fastening piece is sleeved on the lower expansion piece, and the lower fastening piece is in threaded connection with the lower connecting component;
the upper connecting component is connected with the lower connecting component;
the upper connecting assembly is formed by an upper connecting part, an upper threaded part and an upper base, wherein the upper connecting part, the upper threaded part and the upper base are sequentially and detachably connected or integrally formed;
the upper expansion piece and the lower expansion piece are respectively provided with at least two blades, the bottoms of the blades are integrally formed and are surrounded to form a mounting hole, the mounting hole is communicated with the through hole of the upper connecting component or the lower connecting component, the end parts of the blades are mutually independent, the inner wall of the bottom of the blades is provided with a deformation back-off, and the deformation back-off is matched and fixed with the corresponding upper connecting part or the lower connecting part.
2. The quick connector of claim 1, wherein the upper fastener is provided with a fixing hole, the fixing hole is communicated with the mounting hole and the through hole of the upper connecting portion, the inner wall of the fixing hole is provided with a thread structure, and the upper fastener is matched with the external thread of the upper thread portion through the thread structure.
3. A catheter quick connector according to claim 1, wherein the inner diameter of the lower end of the upper expansion member is equal to the outer diameter of the upper connecting portion, and the outer diameter of the lower end of the upper expansion member is 0.05-0.1mm greater than the inner diameter of the assembled catheter.
4. The quick connector of claim 1, wherein the lower connecting assembly comprises a lower connecting portion, a lower threaded portion, a connecting body and a lower base, wherein the lower connecting portion, the lower threaded portion, the connecting body and the lower base are sequentially connected, through holes are formed in the lower connecting portion, the lower threaded portion, the connecting body and the lower base, and the through holes of the lower connecting portion, the lower threaded portion, the connecting body and the lower base are communicated.
5. The catheter quick connector according to claim 4, wherein the outer side of the connecting main body is provided with at least two connector ends in an outward extending mode, the interiors of the two connector ends are communicated with the interior through holes of the connecting main body, and one end of a communicated channel is of a luer inner cone structure; the connector end comprises an exhaust connector, one end of the exhaust connector is of a luer outer cone structure, the other end of the exhaust connector is welded with an exhaust membrane, and the aperture range of the exhaust membrane is 0.1-0.22 mu m.
6. The quick connector of claim 5, wherein the lower fastening member is provided with a fixing hole, the fixing hole is communicated with the mounting hole and the through hole of the lower connecting portion, the inner wall of the fixing hole is provided with a thread structure, and the lower fastening member is matched with the external thread of the lower thread portion through the thread structure.
7. The catheter rapid connector according to claim 1, further comprising a silica gel pad, wherein the silica gel pad is disposed in a cavity formed at a position where the upper connector assembly and the lower connector assembly are connected, and an outer diameter of the silica gel pad is larger than a diameter L of the liquid channel in the upper base, and an outer diameter of the silica gel pad is smaller than an inner diameter H of the cavity at one end of the base.
8. The catheter quick connector according to claim 7, wherein the upper base is internally provided with a sealing rib, and a plurality of limiting parts are arranged on the inner wall of the upper base, and a silica gel pad is arranged between the sealing rib and the limiting parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310796720.2A CN116570831B (en) | 2023-06-30 | 2023-06-30 | Quick joint for catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310796720.2A CN116570831B (en) | 2023-06-30 | 2023-06-30 | Quick joint for catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116570831A CN116570831A (en) | 2023-08-11 |
| CN116570831B true CN116570831B (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310796720.2A Active CN116570831B (en) | 2023-06-30 | 2023-06-30 | Quick joint for catheter |
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| CN (1) | CN116570831B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN116570831A (en) | 2023-08-11 |
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