CN103845781A - Automatic stopping negative-pressure conduction drip chamber - Google Patents

Abstract

The invention provides an automatic stopping drip chamber with a negative-pressure conduction three-way device. The automatic stopping drip chamber can take the place of a common drip chamber and is installed between an upper infusion tube and a lower infusion tube. When infusion finishes or medicine liquid level descends due to medicine change, a stopping device descending seal in a stopping device blocks a medicine liquid channel and achieves stopping, pressure change in the cut-off infusion tube can be accurately conducted to an external connection part through the integrally-designed three-way device, so that the negative pressure in a vein infusion apparatus is further utilized. The automatic stopping drip chamber is simple in structure, elaborate in design, good in manufacturability, high in assembly and production efficiency, low in manufacture cost and stable and reliable in working effect.

Description

A kind of automatic cut-off negative pressure conduction dropping funnel

Technical field

[0001] the present invention relates to a kind of automatic cut-off negative pressure conduction dropping funnel, particularly a kind of by dropping funnel and the integrated design of negative pressure conduction device, utilize stopper buoyancy and gravity of self in medicinal liquid in dropping funnel to realize transfusion and automatic cut-off in when transfusion, and can be after cut-off accurately conduct transfusion device internal pressure by integrated negative pressure conduction device and be changed to infusion management the automatic cut-off negative pressure conduction dropping funnel of real time information is provided.

[0002] disposable intravenous infusion set that medical industry is used in venous transfusion nursing at present, domestic production producer is numerous, and its product structure is similar, and its dropping funnel does not all possess automatic cut-off and negative pressure conduction function; In the decades that use in disposable intravenous infusion set invention, the relevant improved patent of transfusion device approximately has thousands of more than, and major part is all the revising of the functions around aspects such as cut-off, blood return prevention, alarm, Anti-bubble, anti-needle rollers; These are enough to illustrate that disposable intravenous infusion set has arrived needs improved time really, and the right item of its patent has also highlighted the existing problem of disposable intravenous infusion set and defect place thereof; Mainly contain two large classes about transfusion device improvement project: a class is to utilize transfusion device self power automatic cut-off blood return prevention, the anti-air inlet of anti-needle roller (complication after puncture) etc.; Another kind of is use electronic monitoring technology external force auxiliary cut-off, anti-air inlet, blood return prevention and realize alarm; Utilizing aspect transfusion device self power automatic cut-off blood return prevention, its main technical schemes is in Murphy's dropper, to increase automatic cut-off device, as latex ball sealer, float needle, flap valve, valve, conical plug, tension force seepage technology etc., its object is exactly in the time that medicinal liquid is totally lost liquid level decline, these devices can seal liquid-transport pipe-line by self-blocking, stop medicinal liquid to flow, keep tube for transfusion internal pressure, prevent tube for transfusion inner liquid medicine face excessive descent, cause that lower tube for transfusion air inlet, medicinal liquid are counter flows, occurs blood back phenomenon; Or at tube for transfusion bottom and end, the check valve of various structures is installed, and make the medicinal liquid can only one-way flow in tube for transfusion, avoid anti-flow phenomenon, thereby avoided blood back; Aspect the auxiliary cut-off of use electronic monitoring technology external force alarm, mainly concentrate on and use various modern technologies, medicinal liquid in infusion bottle and transfusion device is monitored: as gravimetric method, volumetric method, magnetic method, photosensitive method etc., capture in time the information that medicinal liquid is totally lost, recycling electromagnetic technique clamping tube for transfusion is realized automatic cut-off, prevents that medicinal liquid face excessive descent and blood back phenomenon from occurring and sending warning signal.

With regard to the patent Xiang Eryan of the novel transfusion device aspect about utilizing the automatic cut-off of transfusion device self power, blood return prevention, anti-air inlet, although its object is clear and definite, but function is all more single, lack systematicness, and it is not mature enough perfect to realize technical scheme, manufacturability is poor, is unfavorable for the number of drawbacks such as the application of electronic technology, causes this class technological invention slowly to can not get promotion and application, with regard to another kind of use electric detective technology, the auxiliary cut-off of external force alarm, it is by existing disposable intravenous infusion set, install electronics additional, gravity, the method of the monitoring equipments such as magnetic force, realize automatic cut-off and the alarm monitoring function of venous transfusion, this class invention advanced technology, scheme is fairly perfect, both realized the anti-air inlet function of automatic cut-off blood return prevention of venous transfusion, also realized alarm monitoring function simultaneously, but it has evaded the improvement to transfusion device, make the existing deficiency of disposable intravenous infusion set self can not get solving, transfusion device could not be improved and develop, leave electronic technology, just do not possess automatic cut-off, blood return prevention, anti-air inlet function, moreover the realization of its function relies on completely is external force, and not by the power of transfusion device self, do not meet energy-conserving and environment-protective requirement, moreover automatic cut-off negative pressure conduction transfusion device after improving, it realizes alarm monitoring function does not need electronic monitoring, just can realize alarm monitoring function, though be therefore just not difficult to find out that this class technology is through wideling popularize, the reason of not up to the present still being used widely.

In sum, this case thinks that single transfusion device improves or the method for single dependence electronic technology, all can not solve existing problem in venous transfusion comprehensively, meets growing transfusion nursing requirement; Only have both are combined, the existing defect of transfusion device self and deficiency are improved and perfect, make it both to possess automatic cut-off Anti-bubble blood return prevention function, be convenient to again the application of electronic technology, the negative pressure of utilizing on this basis its cut-off to produce, the modern management that realizes venous transfusion in conjunction with electronic technology is undoubtedly best selection; Bridge and tie that automatic cut-off dropping funnel and negative pressure conduction device combine this two classes technology just; Therefore it is very necessary researching and developing and provide new more simple and practical automatic cut-off dropping funnel and negative pressure conduction technique.

Summary of the invention

The object of the present invention is to provide a kind of automatic cut-off negative pressure conduction dropping funnel, particularly by dropping funnel and the integrated design of negative pressure conduction device, utilize stopper buoyancy and gravity of self in medicinal liquid in dropping funnel to realize transfusion and automatic cut-off, and after cut-off, accurately conduct transfusion device overpressure by integrated negative pressure conduction device and be changed to infusion management the automatic cut-off negative pressure conduction dropping funnel of real time information is provided.In order to achieve the above object, technical scheme of the present invention is achieved in that described automatic cut-off negative pressure conduction dropping funnel 1, be arranged between upper tubing 2 and lower tube for transfusion 3, be assembled by dropping funnel epimere 1-1 and dropping funnel hypomere 1-2, the hypomere dropping funnel connector 1-1-5 of dropping funnel epimere 1-1 is connected connection with the epimere dropping funnel connection tube 1-2-1-1 of dropping funnel hypomere 1-2, and dropping funnel epimere feed tube 1-1-2 is connected connection with the dropping funnel union joint 2-1 of upper tubing 2; The lower tube for transfusion union joint 1-2-3-5-8 of dropping funnel hypomere 1-2 is connected connection with the feed liquor mouth of pipe 3-1 of lower tube for transfusion 3.

Described automatic cut-off negative pressure conduction dropping funnel 1, its dropping funnel epimere 1-1 is transparent barrel-like structure, its length is about 2/3rds of dropping funnel total length, is made up of feed tube 1-1-2, transparent observing pipe 1-1-3, medicinal liquid face graduation mark 1-1-4, hypomere dropping funnel connector 1-1-5; Feed tube mounting pipe 1-1-1 is connected connection with the dropping funnel union joint 2-1 of upper tubing 2; Feed tube 1-1-2 extends in transparent observing pipe 1-1-3 through feed tube mounting pipe 1-1-1 and has certain length to form to guarantee drop; The middle part of transparent observing pipe 1-1-3 is provided with medicinal liquid face graduation mark 1-1-4, and medicinal liquid face when it is transfusion in dropping funnel is with reference to altitude line; The hypomere dropping funnel connector 1-1-5 of dropping funnel epimere 1-1 is embedded into dropping funnel dropping funnel shell and carries in the dropping funnel epimere connection tube 1-2-1-1 of 1-2-1 and be connected and be integrated with dropping funnel hypomere 1-2.

Described automatic cut-off negative pressure conduction dropping funnel 1, its dropping funnel hypomere 1-2 is funnel-shaped structure, by dropping funnel housing 1-2-1, stopper 1-2-2 in shell, the outer negative-pressure guide integrated device 1-2-3 composition of shell, in shell, in the shell of stopper 1-2-2, mozzle 1-2-2-6 is assemblied in intrasegmental part under dropping funnel through the water conservancy diversion mouth of pipe 1-2-1-4 of dropping funnel housing 1-2-1, the outer negative-pressure guide integrated device 1-2-3 of shell and dropping funnel housing 1-2-1 are integrated part, the connection shell 1-2-3-3 of the outer negative-pressure guide integrated device 1-2-3 of shell is connected in the water conservancy diversion nose end of the conjoined outer shell 1-2-1-3 of dropping funnel housing 1-2-1, the fluid mozzle 1-2-3-1 concentric of the outer negative-pressure guide integrated device 1-2-3 of the water conservancy diversion mouth of pipe 1-2-1-4 of dropping funnel housing 1-2-1 and shell, the negative pressure generator tube 1-2-3-2 of the outer negative-pressure guide integrated device 1-2-3 of shell is connected in the conjoined outer shell 1-2-1-3 mono-side outer rim of dropping funnel housing 1-2-1 partially.

Described automatic cut-off negative pressure conduction dropping funnel 1, the dropping funnel housing 1-2-1 of its dropping funnel hypomere 1-2 is from top to bottom by epimere dropping funnel connection tube 1-2-1-1, connect stopper slot 1-2-1-2, conjoined outer shell 1-2-1-3, water conservancy diversion mouth of pipe 1-2-1-4 forms, wherein connecting stopper slot 1-2-1-2 is U-shaped notch, inwall is that epimere dropping funnel connection tube 1-2-1-1 outer wall is L shaped entity, epimere dropping funnel connection tube 1-2-1-1 lower end is connected with conjoined outer shell 1-2-1-3, conjoined outer shell 1-2-1-3 is funnel-form entity, be integrated part with the disjunctor shell 1-2-3-3 of the outer negative-pressure guide integrated device 1-2-3 of shell, lower end core leaves water conservancy diversion mouth of pipe 1-2-1-4, water conservancy diversion mouth of pipe 1-2-1-4 communicates with the fluid conduction pipe concentric of the outer negative-pressure guide integrated device 1-2-3 of shell.

Described automatic cut-off negative pressure conduction dropping funnel 1, in the shell of its dropping funnel hypomere 1-2, stopper 1-2-2 is umbrella-shaped structure, is made up of mozzle 1-2-2-6, mozzle mounting limit platform 1-2-2-7, ring packing hoop 1-2-2-8, buoyancy aid cambered surface membrane seal 1-2-2-9 in flow guiding disc 1-2-2-1, concave arc sealing surface 1-2-2-2, feed liquor pod apertures 1-2-2-3, sealing flow-guiding mouth 1-2-2-4, assembling outer ring surface 1-2-2-5, shell, wherein flow guiding disc 1-2-2-1 is positioned on mozzle mounting limit platform 1-2-2-7, mozzle mounting limit platform 1-2-2-7 is positioned at shell mozzle 1-2-2-6 top, concave arc sealing surface 1-2-2-2 is the upper surface of flow guiding disc 1-2-2-1, sealing flow-guiding mouth 1-2-2-4 is that tubulose is positioned at the bottom centre of the upper concave arc sealing surface 1-2-2-2 of flow guiding disc 1-2-2-1 and outstanding a little, be connected with mozzle 1-2-2-6 in shell, it is the outlet that liquid flows out stopper 1-2-2 in shell, feed liquor pod apertures 1-2-2-3 is the passage that liquid flows into cut-off 1-2-2 device in shell, generally have multiple, be looped around the surrounding of sealing flow-guiding mouth 1-2-2-4, run through flow guiding disc 1-2-2-1 and mozzle mounting limit platform 1-2-2-7, buoyancy aid cambered surface membrane seal 1-2-2-9 cap-like structure, be covered on the concave arc sealing surface 1-2-2-2 of flow guiding disc 1-2-2-1, ring packing hoop 1-2-2-8 is sleeved on assembling outer ring surface 1-2-2-5 and above buoyancy aid cambered surface membrane seal 1-2-2-9 is fixed, buoyancy aid cambered surface membrane seal 1-2-2-9 is by cancave cambered surface latex diaphragm 1-2-2-9-1, diaphragm cambered surface inlet opening 1-2-2-9-2, diaphragm annular edge 1-2-2-9-3, diaphragm center float mounting groove 1-2-2-9-4, U-shaped float shell 1-2-2-9-5, float shell sealing installing port 1-2-2-9-6 composition, cancave cambered surface latex diaphragm 1-2-2-9-1 is the straight cambered surface diaphragm in bottom, diaphragm has diaphragm annular edge 1-2-2-9 around, bottom straight portion upper surface has diaphragm center float mounting groove 1-2-2-9-4, in its cambered surface part around, there is diaphragm cambered surface inlet opening 1-2-2-9-2, U-shaped float shell 1-2-2-9-5 is hollow shell, its lower ending opening end is embedded in the assembly buoyancy aid cambered surface membrane seal 1-2-2-9 that forms hollow in the float mounting groove 1-2-2-9-4 of diaphragm center with latex diaphragm, in the interior stopper 1-2-2 of shell, feed liquor pod apertures 1-2-2-3 and diaphragm cambered surface inlet opening 1-2-2-9-1 can exist also jointly can individualism, but two structures can not lack simultaneously.

Described automatic cut-off negative pressure conduction dropping funnel 1, the outer negative-pressure guide integrated device 1-2-3 of its shell, for the integrated device of dropping funnel housing 1-2-1, mainly by fluid conduction pipe 1-2-3-1, negative pressure generation pipeline 1-2-3-2, disjunctor shell 1-2-3-3, mozzle negative tube merges a mouthful 1-2-3-4, merge a mouthful end socket part 1-2-3-5, negative pressure pouch 1-2-3-6 forms, the water conservancy diversion mouth of pipe concentric radius of its fluid conduction pipe 1-2-3-1 and dropping funnel housing 1-1-2 and being connected, negative pressure generation pipeline 1-2-3-2 is the pipeline of unidirectional opening downwards, tangent with fluid conduction pipe 1-2-3-1 and be connected, disjunctor shell 1-2-3-3 is that tube wall upper end and the dropping funnel housing 1-1-2 of fluid conduction pipe 1-2-3-1 and negative pressure generation pipeline 1-2-3-2 is connected as a single entity, hypomere is mozzle negative tube and merges a mouthful 1-2-3-4, can be connected with parallel port end socket part 1-2-3-5, parallel port end socket part 1-2-3-5 is twin flue three-port structure, by end socket installation opening 1-2-3-5-1, mozzle docking port 1-2-3-5-2, negative pressure pouch erecting bed 1-2-3-5-3, pouch cover tankage 1-2-3-5-4, air duct 1-2-3-5-5, merge a mouthful end socket shell 1-2-3-5-6, corollary system union joint 1-2-3-5-7, lower tube for transfusion union joint 1-2-3-5-8 forms, end socket installation opening 1-2-3-5-1 is positioned at end socket part 1-2-3-5 upper end, parallel port, for 8-shaped U notch structure, can merge a mouthful 1-2-3-4 with mozzle negative tube is connected, its inwall is mozzle docking port 1-2-3-5-2 and negative pressure pouch erecting bed 1-2-3-5-3, outer wall is for merging a mouthful end socket shell 1-2-3-5-6, mozzle docking port 1-2-3-5-2 is that annular mouth of pipe upper end can communicate with the inner tube of lower tube for transfusion union joint 1-2-3-5-8 with mozzle 1-2-2-6 linking hypomere in shell, form liquid communication pipeline, negative pressure pouch erecting bed 1-2-3-5-3 has the up-thin-low-thick ring body in duct in being, it is the supporting body of negative pressure pouch 1-2-3-6, the pouch cover tankage 1-2-3-5-4 of its ring wall bottom outer rim can with the negative pressure sac band annular mouth 1-2-3-6-1 phase embedding of negative pressure pouch 1-2-3-6 and, be convenient to the fixing of negative pressure pouch 1-2-3-6 and install, after negative pressure pouch 1-2-3-6 assembling, the bag 1-2-3-6-2 of negative pressure pouch can be placed in the negative pressure generation pipeline 1-2-3-2 of the outer negative-pressure guide integrated device 1-2-3 of shell, by the duct of negative pressure pouch erecting bed 1-2-3-5-3, be connected and become the airtight tract that lower end is in communication with the outside with an air duct 1-2-3-5-5 who merges mouth end socket part 1-2-3-5, air duct 1-2-3-5-5 is L-type pipeline, longitudinally parallel with fluid conduction pipe 1-2-3-1, be laterally the inner tube of corollary system union joint 1-2-3-5-7, being convenient to the air scavenge in air duct 1-2-3-5-5 or sucking provides pressure changing accurately for corollary system.

Beneficial effect:

The invention provides a kind of automatic cut-off negative pressure conduction dropping funnel, its structural design is ingenious, utilize gravity and law of buoyancy, make the dropping funnel of disposable intravenous infusion set can utilize own characteristic to there is automatic cut-off function, both having stopped in venous transfusion tube for transfusion inner liquid medicine face height air inlet and the anti-blood phenomenon that flows back to causing that decline occurs, negative pressure conduction device and dropping funnel integrated design were both convenient to manufacture and have also been convenient to install, simultaneously for outside monitor system provides negative pressure support; Compared to other stopper, have existing transfusion device is changed little, easy and simple to handle, the feature such as energy-conserving and environment-protective, manufacturability are strong; In clinical practice, can effectively reduce medical personnel's amount of labour, make more standard of infusion management.

Accompanying drawing explanation: Fig. 1, automatic cut-off negative pressure conduction dropping funnel installation diagram

Fig. 2, automatic cut-off negative pressure conduction dropping funnel cutaway view

Fig. 3, dropping funnel epimere perspective view

Fig. 4, dropping funnel hypomere cutaway view

Fig. 5, dropping funnel shell are carried, the outer negative-pressure guide integrated device cutaway view of shell

Stopper one cutaway view in Fig. 6, shell

Stopper two cutaway views in Fig. 7, shell

Fig. 8, buoyancy aid cambered surface membrane seal one cutaway view

Fig. 9, buoyancy aid cambered surface membrane seal two cutaway views

Figure 10, parallel port end socket part cutaway view

1, automatic cut-off negative pressure conduction dropping funnel

1-1, dropping funnel epimere

1-1-1, feed tube mounting pipe

1-1-2, feed tube

1-1-3, transparent observing pipe

1-1-4, medicinal liquid face graduation mark

1-1-5, hypomere dropping funnel connector

1-2, dropping funnel hypomere

Piece housing under 1-2-1, dropping funnel

1-2-1-1, epimere dropping funnel connection tube

1-2-1-2, connection stopper slot

1-2-1-3, conjoined outer shell

1-2-1-4, the water conservancy diversion mouth of pipe

Stopper in 1-2-2, shell

1-2-2-1, flow guiding disc

1-2-2-2, concave arc sealing surface

1-2-2-3, feed liquor pod apertures

1-2-2-4, sealing flow-guiding mouth

1-2-2-5, assembling outer ring surface

Mozzle in 1-2-2-6, shell

1-2-2-7, mozzle mounting limit platform

1-2-2-8, ring packing hoop

1-2-2-9, buoyancy aid cambered surface membrane seal

1-2-2-9-1, cancave cambered surface latex diaphragm

1-2-2-9-2, diaphragm cambered surface inlet opening

1-2-2-9-3, diaphragm annular edge

1-2-2-9-4, diaphragm center float mounting groove

1-2-2-9-5, U-shaped float shell

1-2-2-9-6, float shell sealing installing port

1-2-3, the outer negative-pressure guide integrated device of shell

1-2-3-1, fluid conduction pipe

1-2-3-2, negative pressure generation pipeline

1-2-3-3, disjunctor shell

1-2-3-4, mozzle negative tube merge mouth

1-2-3-5, a merging mouthful end socket part

1-2-3-5-1, end socket installation opening

1-2-3-5-2, mozzle docking port

1-2-3-5-3, negative pressure pouch erecting bed

1-2-3-5-4, pouch cover tankage

1-2-3-5-5, air duct

1-2-3-5-6, a merging mouthful end socket shell

1-2-3-5-7, corollary system union joint

1-2-3-5-8, lower tube for transfusion union joint

1-2-3-6, negative pressure pouch

1-2-3-6-1, negative pressure pouch annular mouth

1-2-3-6-2, negative pressure pouch bag

2, upper tubing

2-1, dropping funnel connect tube head

3, lower tube for transfusion

3-1, the feed liquor mouth of pipe

Specific embodiment

In actual venous transfusion process, the tube for transfusion inner liquid medicine flow of disposable intravenous infusion set, because being subject to the Flow-rate adjustment restriction of piercing needle and flow control valve, in most transfusion, can not flow by the maximum stream flow of design, making has pressure to exist in tube for transfusion in the inherent whole infusion process of tube for transfusion, also have just the venous transfusion that exists of pressure just can continue to carry out, the pressure in tube for transfusion is the essential condition of venous transfusion, and its pressure strengthens from top to bottom gradually, therefore in transfusion device pipeline and with the tube chamber of pipeline communication in all there is the malleation to tube wall, cause the expansion of soft tube wall, when medicinal liquid is totally lost after the decline of medicinal liquid face, the suffered malleation of tube wall disappears, tube wall returns to naturalness, the intracavity being attached thereto because of tube wall tympanites and contraction, extruding air, make air produce the mobile negative pressure that produces, the position at the air place simultaneously squeezing out forms cavity, liquid just can flow in the cavity forming, otherwise in the time that pressure disappears, the tube wall expanding produces to shrink and recovers, the cavity forming because of tympanites disappears, diaphragm is airtight coverage rate again, mobile disappearance or the cut-off of liquid,

Automatic cut-off negative pressure conduction dropping funnel 1 in this case, is linked and packed with upper tubing 2 and lower tube for transfusion 3, makes transfusion device can have the anti-return blood of automatic cut-off, and the pressure after cut-off can be changed accurately and conducts to outer welding system, realizes the collection of infusion information.It is in use identical with common disposable intravenous infusion set operation sequence, the hand-held new disposable intravenous transfusion device of medical personnel, first automatic cut-off negative pressure conduction dropping funnel 1 is inverted, to wear bottle is needled in medicinal liquid bottle again, medicinal liquid will flow in automatic cut-off negative pressure conduction dropping funnel 1 in upper tubing 2, while rising to the middle medicinal liquid face graduation mark 1-1-4 of dropping funnel epimere 1-1 in medicinal liquid face, slowly automatic cut-off negative pressure conduction dropping funnel 1 is turned again, medicinal liquid enters the below of buoyancy aid cambered surface membrane seal 1-2-2-9 by feed liquor pod apertures 1-2-2-3 or diaphragm cambered surface inlet opening 1-2-2-9-2, at this moment the buoyancy aid cambered surface membrane seal 1-2-2-9 in dropping funnel hypomere 1-2 floats under the buoyancy of medicinal liquid, the cancave cambered surface latex diaphragm 1-2-2-9-1 of buoyancy aid cambered surface membrane seal 1-2-2-9 departs from sealing flow-guiding mouth 1-2-2-4, below forms water conservancy diversion cavity, medicinal liquid can flow smoothly in water conservancy diversion cavity, negative pressure pouch 1-2-3-6 in the outer negative-pressure guide integrated device 1-2-3 of shell shrinks under medicinal liquid pressure-acting simultaneously, the air of negative pressure generation pipeline 1-2-3-2 is extruded from air duct 1-2-3-5-5, medicinal liquid in inflow negative pressure generation pipeline 1-2-3-2 is because of the interval of negative pressure pouch 1-2-3-6, do not contact with air, guarantee infusion safety.

Otherwise when the medicinal liquid in medicinal liquid bottle is totally lost, the pressure of the outer negative-pressure guide integrated device 1-2-3 of shell of automatic cut-off negative pressure conduction dropping funnel 1 approaches while disappearance, buoyancy aid cambered surface membrane seal 1-2-2-9 in shell in stopper 1-2-2 falls under the gravity pressure of U-shaped float shell 1-2-2-9-5 is forced to make peace negative pressure combined effect, cover the sealing flow-guiding mouth 1-2-2-4 of stopper 1-2-2 in shell, the medicinal liquid in blocking-up tube for transfusion flows; Tube for transfusion endogenous cause of ill medicinal liquid gravity after cut-off produces negative pressure, in the negative pressure generation pipeline 1-2-3-2 of the outer negative-pressure guide integrated device 1-2-3 of shell being communicated with it, the negative pressure pouch 1-2-3-6 shrinking disappears because of normal pressure, the pulling force of negative pressure makes the cavity in its bag produce negative pressure, air will flow into from air duct 1-2-3-5-5, and the corollary system being connected with air duct 1-2-3-5-5 can be worked thus.

Medicinal liquid in automatic cut-off negative pressure conduction dropping funnel 1 after cut-off is no longer mobile, liquid level no longer declines, there is transfusion halted state, now stay the medicinal liquid in automatic cut-off negative pressure conduction dropping funnel 1 and lower tube for transfusion 3, still maintain certain pressure, avoided air to enter in lower tube for transfusion and anti-generation of flowing back to blood phenomenon.

If continue transfusion, continuous bottle change dressings after the operator middle and upper part that only need gently pinch automatic cut-off negative pressure conduction dropping funnel 1, then unclamp fast, automatic cut-off negative pressure conduction dropping funnel 1 will suck the medicinal liquid in medicinal liquid bottle fast, supplement lower medicinal liquid face in dropping funnel, simultaneously by buoyancy aid cambered surface membrane seal 1-2-2-9 sealing sealing flow-guiding mouth 1-2-2-4 open, medicinal liquid starts to flow, and enters continuation transfusion state.

In process of production, the structural member in this case adopts conventional production technology to produce, and manufacturability is strong, and production cost is low; Adopt the manufacture of multimode injection moulding, production efficiency is high; Buoyancy aid cambered surface membrane seal 1-2-2-9, negative pressure pouch 1-2-3-6 can adopt soft thinner latex material to make, and to increase adaptability, guarantee sealing effectiveness.

Automatic cut-off negative pressure provided by the present invention conduction dropping funnel 1, its modern design, is skillfully constructed, and takes full advantage of the characteristic of liquid and pressure, gravity, principle of negative pressure, has reached the automatic cut-off of venous transfusion, negative pressure conduction, anti-air inlet, the object of blood return prevention; Latex diaphragm manufacturability is strong, good sealing effect, and negative pressure conductive performance is reliable and stable; Its sealing stopper is spacing in liquid outlet one end of dropping funnel inside, does not affect formation and the observing effect of drop in dropping funnel, does not increase the volume of dropping funnel and affects outward appearance, similar or close to the traditional style of disposable general infusion set dropping funnel; Negative pressure conduction device does not affect the flow effect of medicinal liquid, and its amount of flow is more than or equal to defined flow standard in GB.

Be equipped with disposable intravenous infusion set of the present invention, do not change medical personnel's work habit, its operation sequence is identical with disposable intravenous infusion set, is easy to learn and use; Compared to other stopper, have simple in structure, good sealing effect, the feature such as manufacturability is strong; In clinical practice, can effectively reduce medical personnel's labor intensity, save a large amount of human resources who takies for observing transfusion progress, make more standard of infusion management, nurse more intimate.

  

Claims (6)

1. automatic cut-off negative pressure conduction dropping funnel (1), it is arranged between upper tubing (2) and lower tube for transfusion (3), be assembled by dropping funnel epimere (1-1) and dropping funnel hypomere (1-2), the hypomere dropping funnel connector (1-1-5) of dropping funnel epimere (1-1) is connected connection with the epimere dropping funnel connection tube (1-2-1-1) of dropping funnel hypomere (1-2), and dropping funnel epimere feed tube (1-1-2) is connected connection with the dropping funnel union joint (2-1) of upper tubing (2); The lower tube for transfusion union joint (1-2-3-5-8) of dropping funnel hypomere (1-2) is connected connection with the feed liquor mouth of pipe (3-1) of lower tube for transfusion (3).

2. automatic cut-off negative pressure according to claim 1 is conducted dropping funnel (1), be it is characterized in that its dropping funnel epimere (1-1) is transparent barrel-like structure, its length is about 2/3rds of dropping funnel total length, is made up of feed tube (1-1-2), transparent observing pipe (1-1-3), medicinal liquid face graduation mark (1-1-4), hypomere dropping funnel connector (1-1-5); Feed tube mounting pipe (1-1-1) is connected connection with the dropping funnel union joint (2-1) of upper tubing (2); Feed tube (1-1-2) extends in transparent observing pipe (1-1-3) through feed tube mounting pipe (1-1-1) and has certain length to form to guarantee drop; The middle part of transparent observing pipe (1-1-3) is provided with medicinal liquid face graduation mark (1-1-4), and medicinal liquid face when it is transfusion in dropping funnel is with reference to altitude line; The hypomere dropping funnel connector (1-1-5) of dropping funnel epimere (1-1) is embedded into dropping funnel dropping funnel shell and carries in the dropping funnel epimere connection tube (1-2-1-1) of (1-2-1) and be connected and be integrated with dropping funnel hypomere (1-2).

3. automatic cut-off negative pressure conduction dropping funnel according to claim 1 (1), it is characterized in that its dropping funnel hypomere (1-2) is funnel-shaped structure, by dropping funnel housing (1-2-1), stopper (1-2-2) in shell, outer negative-pressure guide integrated device (1-2-3) composition of shell, in shell, in the shell of stopper (1-2-2), mozzle (1-2-2-6) is assemblied in dropping funnel hypomere (1-2) inside through the water conservancy diversion mouth of pipe (1-2-1-4) of dropping funnel housing (1-2-1), the outer negative-pressure guide integrated device (1-2-3) of shell is integrated part with dropping funnel housing (1-2-1), the connection shell (1-2-3-3) of the outer negative-pressure guide integrated device (1-2-3) of shell is connected in the water conservancy diversion nose end of the conjoined outer shell (1-2-1-3) of dropping funnel housing (1-2-1), fluid mozzle (1-2-3-1) concentric of the outer negative-pressure guide integrated device (1-2-3) of the water conservancy diversion mouth of pipe (1-2-1-4) of dropping funnel housing (1-2-1) and shell, the negative pressure generator tube (1-2-3-2) of the outer negative-pressure guide integrated device (1-2-3) of shell is connected in conjoined outer shell (1-2-1-3) side outer rim of dropping funnel housing (1-2-1) partially.

4. automatic cut-off negative pressure conduction dropping funnel according to claim 1 (1), it is characterized in that the dropping funnel housing (1-2-1) of its dropping funnel hypomere (1-2) is from top to bottom by epimere dropping funnel connection tube (1-2-1-1), connect stopper slot (1-2-1-2), conjoined outer shell (1-2-1-3), the water conservancy diversion mouth of pipe (1-2-1-4) forms, wherein connecting stopper slot (1-2-1-2) is U-shaped notch, inwall is that epimere dropping funnel connection tube (1-2-1-1) outer wall is L shaped entity, epimere dropping funnel connection tube (1-2-1-1) lower end is connected with conjoined outer shell (1-2-1-3), conjoined outer shell (1-2-1-3) is funnel-form entity, be integrated part with the disjunctor shell (1-2-3-3) of the outer negative-pressure guide integrated device (1-2-3) of shell, lower end core leaves the water conservancy diversion mouth of pipe (1-2-1-4), the water conservancy diversion mouth of pipe (1-2-1-4) communicates with the fluid conduction pipe concentric of the outer negative-pressure guide integrated device (1-2-3) of shell.

5. automatic cut-off negative pressure according to claim 1 is conducted dropping funnel (1), be it is characterized in that the interior stopper (1-2-2) of shell of its dropping funnel hypomere (1-2) is umbrella-shaped structure, by mozzle (1-2-2-6), mozzle mounting limit platform (1-2-2-7), ring packing hoop (1-2-2-8), buoyancy aid cambered surface membrane seal (1-2-2-9) formation in flow guiding disc (1-2-2-1), concave arc sealing surface (1-2-2-2), feed liquor pod apertures (1-2-2-3), sealing flow-guiding mouth (1-2-2-4), assembling outer ring surface (1-2-2-5), shell, wherein flow guiding disc (1-2-2-1) is positioned on mozzle mounting limit platform (1-2-2-7), mozzle mounting limit platform (1-2-2-7) is positioned at shell mozzle (1-2-2-6) top, concave arc sealing surface (1-2-2-2) is the upper surface of flow guiding disc (1-2-2-1), sealing flow-guiding mouth (1-2-2-4) is gone up the bottom centre of concave arc sealing surface (1-2-2-2) and outstanding a little for tubulose is positioned at flow guiding disc (1-2-2-1), be connected with mozzle in shell (1-2-2-6), it is the outlet that liquid flows out stopper (1-2-2) in shell, feed liquor pod apertures (1-2-2-3) is the passage that liquid flows into cut-off (1-2-2) device in shell, generally have multiple, be looped around the surrounding of sealing flow-guiding mouth (1-2-2-4), run through flow guiding disc (1-2-2-1) and mozzle mounting limit platform (1-2-2-7), buoyancy aid cambered surface membrane seal (1-2-2-9) cap-like structure, be covered on the concave arc sealing surface (1-2-2-2) of flow guiding disc (1-2-2-1), it is upper that buoyancy aid cambered surface membrane seal (1-2-2-9) is fixing that ring packing hoop (1-2-2-8) is sleeved on assembling outer ring surface (1-2-2-5), buoyancy aid cambered surface membrane seal (1-2-2-9) is by cancave cambered surface latex diaphragm (1-2-2-9-1), diaphragm cambered surface inlet opening (1-2-2-9-2), diaphragm annular edge (1-2-2-9-3), diaphragm center float mounting groove (1-2-2-9-4), U-shaped float shell (1-2-2-9-5), float shell sealing installing port (1-2-2-9-6) composition, cancave cambered surface latex diaphragm (1-2-2-9-1) is the straight cambered surface diaphragm in bottom, diaphragm has diaphragm annular edge (1-2-2-9) around, bottom straight portion upper surface has diaphragm center float mounting groove (1-2-2-9-4), in its cambered surface part around, there is diaphragm cambered surface inlet opening (1-2-2-9-2), U-shaped float shell (1-2-2-9-5) is hollow shell, its lower ending opening end is embedded in the assembly buoyancy aid cambered surface membrane seal (1-2-2-9) that forms hollow in diaphragm center float mounting groove (1-2-2-9-4) with latex diaphragm, in the interior stopper (1-2-2) of shell, feed liquor pod apertures (1-2-2-3) and diaphragm cambered surface inlet opening (1-2-2-9-1) can exist also jointly can individualism, but two structures can not lack simultaneously.

6. automatic cut-off negative pressure conduction dropping funnel according to claim 1 (1), it is characterized in that the outer negative-pressure guide integrated device (1-2-3) of its shell, for the integrated device of dropping funnel housing (1-2-1), mainly by fluid conduction pipe (1-2-3-1), negative pressure generation pipeline (1-2-3-2), disjunctor shell (1-2-3-3), mozzle negative tube merges mouthful (1-2-3-4), merge a mouthful end socket part (1-2-3-5), negative pressure pouch (1-2-3-6) forms, the water conservancy diversion mouth of pipe concentric radius of its fluid conduction pipe (1-2-3-1) and dropping funnel housing (1-1-2) and being connected, negative pressure generation pipeline (1-2-3-2) is the pipeline of unidirectional opening downwards, tangent with fluid conduction pipe (1-2-3-1) and be connected, disjunctor shell (1-2-3-3) is that tube wall upper end and the dropping funnel housing (1-1-2) of fluid conduction pipe (1-2-3-1) and negative pressure generation pipeline (1-2-3-2) is connected as a single entity, hypomere is mozzle negative tube and merges mouthful (1-2-3-4), can be connected with parallel port end socket part (1-2-3-5), parallel port end socket part (1-2-3-5) is twin flue three-port structure, by end socket installation opening (1-2-3-5-1), mozzle docking port (1-2-3-5-2), negative pressure pouch erecting bed (1-2-3-5-3), pouch cover tankage (1-2-3-5-4), air duct (1-2-3-5-5), merge a mouthful end socket shell (1-2-3-5-6), corollary system union joint (1-2-3-5-7), lower tube for transfusion union joint (1-2-3-5-8) forms, end socket installation opening (1-2-3-5-1) is positioned at upper end, parallel port end socket part (1-2-3-5), for 8-shaped U notch structure, can merge mouthful (1-2-3-4) with mozzle negative tube is connected, its inwall is mozzle docking port (1-2-3-5-2) and negative pressure pouch erecting bed (1-2-3-5-3), outer wall is for merging a mouthful end socket shell (1-2-3-5-6), mozzle docking port (1-2-3-5-2) communicates with the inner tube of lower tube for transfusion union joint (1-2-3-5-8) for annular mouth of pipe upper end can be connected hypomere with mozzle in shell (1-2-2-6), form liquid communication pipeline, negative pressure pouch erecting bed (1-2-3-5-3) has the up-thin-low-thick ring body in duct in being, it is the supporting body of negative pressure pouch (1-2-3-6), the pouch cover tankage (1-2-3-5-4) of its ring wall bottom outer rim can with negative pressure sac band annular mouth (1-2-3-6-1) the phase embedding of negative pressure pouch (1-2-3-6) and, be convenient to the fixing of negative pressure pouch (1-2-3-6) and install, after negative pressure pouch (1-2-3-6) assembling, the bag (1-2-3-6-2) of negative pressure pouch can be placed in the negative pressure generation pipeline (1-2-3-2) of the outer negative-pressure guide integrated device (1-2-3) of shell, by the duct of negative pressure pouch erecting bed (1-2-3-5-3), be connected and become the airtight tract that lower end is in communication with the outside with an air duct (1-2-3-5-5) that merges mouth end socket part (1-2-3-5), air duct (1-2-3-5-5) is L-type pipeline, longitudinally parallel with fluid conduction pipe (1-2-3-1), be laterally the inner tube of corollary system union joint (1-2-3-5-7), being convenient to the air scavenge in air duct (1-2-3-5-5) or sucking provides pressure changing accurately for corollary system.

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