CN204734788U - Buoyancy formula non return infusion set - Google Patents

Abstract

(B, ) the utility model relates to a medical treatment liquid accessory technical field, a buoyancy formula non return infusion set, it includes non return casing and float, be equipped with liquid inlet channel and stock solution chamber in the non return casing respectively, liquid inlet channel's upper portion is for being located the inlet on the non return casing, be equipped with the intercommunication passageway between liquid inlet channel and the stock solution chamber, the bottom in stock solution chamber is equipped with the liquid outlet, the stock solution intracavity cover that corresponds liquid outlet top position is equipped with and surpasses the minimum float that floats and be less than minimum whereabouts in limited time and shutoff liquid outlet at the liquid medicine liquid level in limited time at liquid medicine liquid level. The utility model discloses a separately set up liquid inlet channel and stock solution chamber, can effectively eliminate the effort of liquid drippage to the float to and to the restriction of float and stock solution chamber clearance, liquid medicine drippage runner and the velocity of flow, having good non return effect, the liberation manpower need not patient or accompanies and attends to the people to observe the dropping liquid circumstances constantly, and the suitability of rising and falling that adopts buoyancy control float is strong, can satisfy the use of multiple liquid medicine, the facilitate promotion. (B, )

Description

Floatage-type non-return infusion set

Technical field

this utility model relates to medical fluid accessory technical field, is a kind of floatage-type non-return infusion set.

Background technology

transfusion device conventional at present generally comprises intravenous needle, helmet, infusion tube, liquid medicine filter, flow regulator, drips kettle, bottle plug puncture unit and air inlet pipe air filter etc., it all needs patient or the people that accompanies and attends to observe dropping liquid process in use, until the liquid that liquid more renews when being about to drip off or pull out intravenous needle, prevent with this phenomenon occurring blood backflow after liquid drips off.But the process of dropping liquid is very long and uninteresting, patient or guardian are very easily absent-minded in observation process or feel sleepy, so that the phenomenon of blood back happens occasionally, and cannot better be solved.

also have in the prior art and can realize at the device of liquid by return blood anti-time most, it is mostly be respectively equipped with feed liquor and liquid outlet channel at the upper-lower position of liquid storage cavity, and float is provided with in cavity, when fluid low in liquid storage cavity is with the buoyancy providing float to float, float will be sunken to liquid storage cavity bottom, thus shutoff liquid outlet channel.But at this class formation, the circulation of medicinal liquid is all from top to bottom, it can be dropped on float and produce certain resistance to float, the gap that simultaneously can restrict between float and liquid storage cylinder body sidewall sets and the flow velocity of medicinal liquid, namely, when the down suction of float and place cavity is less, can guarantee that float moves up and down smooth and easy, now less gap can make the narrows passageways of medicinal liquid, cause medicinal liquid to be deteriorated by property, reduce the flow velocity of medicinal liquid; When the down suction of float and place cavity is larger, can guarantee that medicinal liquid can pass through smoothly, but in the case, float is vulnerable to external shock and is subjected to displacement, and when easily there is float drops, position is inaccurate and cannot the phenomenon of effective shutoff liquid outlet channel, thus affect its non-return effect; In addition, on the path all flowed through at medicinal liquid because float is overall, it also may block inlet after floating, and affects stability and the reliability of transfusion so all the better.A kind of automatic exhausting anti-blood backflow infusion set and medical Transfusion device thereof is disclosed in Chinese invention patent CN201210189228, set up the vertical position-limited rack that can limit float mobile space in described blood return prevention infusion set and medicinal liquid can have been divided the skirt dropped in outside float, although it can make medicinal liquid can not be dropped on float, and float can be moved in the reasonable scope, but vertical position-limited rack itself is also in the passage that normal liquid flows through, the effect of its abirritant flow velocity is also limited, and also there is processed complex, higher to the requirement of machining accuracy, increase the problem of its production cost.

also have in the prior art and can realize can identifying this state time most at liquid and reminding the device of early warning, mainly comprise infra-red detection, electric capacity detection and gravity and weigh detection etc.Infra-red detection method, the physical quantity of its actual detection is that liquid and tube for transfusion integrate ultrared refractive index.Faced by the method needs is the tube for transfusion of unlike material, the tube for transfusion of different colours, the medicinal liquid of different colours, the density of different medicinal liquid, the formula of the density of different plastic raw materials and purity, different manufacturer and processing technique.In this case, the quantity of various combination is too huge, guarantee the accuracy detected, need the adjustment repeatedly of a large amount of tests and product.This just allows research and development reliably a, uses the product of infra-red detection technology, has to pay higher research and development testing cost.But medicine new every year and material constantly enter medical market, also huge challenge can be formed to its stability and reliability.On the other hand, using the product of infra-red detection technology, must carry out under open state owing to detecting itself, so necessary manually opened and closedown when using, all will operate when changing infusion bottle/transfusion bag.Therefore infra-red detection method is not convenient in use, needs more manual intervention.If forget closedown, its non-productive work can waste limited electric energy again, reduces service life.Therefore infra-red detection is not suitable for use in the scene of transfusion detection.Capacitance detecting method, the physical quantity of its actual detection is the comprehensive electric charge carrying capacity of liquid and tube for transfusion.The program in the question marks guaranteeing to run into infrared ray in reliability and convenience seemingly, is all difficult to ensure the reliability of detection and the convenience of use, therefore is also not suitable for being used in the scene of transfusion detection.No matter be adopt infra-red detection technology or electric capacity Detection Techniques, it all needs sensitive detection parts to be fixed on transfusion device.Existing fixed solution, by RF transmitter and receptor, or two plate electrodes of electric capacity be placed in fixture two inside, then to be fixed on transfusion device by fixture.When using fixture, the detection of the parts of key can be placed in one need repeatedly to contact, repeatedly opening and closing use, stressed larger position, therefore can cause harmful effect to the precision of detection sensitive detection parts and stability, not only affect service life, and malpractice, nursing accident easily occur.Gravity weighs detection and refers to, utilizes infusion bottle or the transfusion bag weight difference when having liquid and no liquid to react the detection method of whether infusing and terminating.This kind of scheme all comprises the title of a Measuring Object weight.Carry owing to claiming itself to be not easy to installation, and the medicine liquid volume varying in size, infuse needed for object of infusion bottle or transfusion bag is different, the material difference of infusion bottle or transfusion bag (glass, plastics etc.) etc. problem make gravity weigh Detection Techniques can not to have a unified detection index.Therefore the method is also not suitable for being used in the scene of transfusion detection.

existing infusion alarming technology adopts detection and warning to be integrated scheme, and probe portion and alarm portion use same battery supply, needs near exploring block, to send sound and light signal when reporting to the police.This scheme has several shortcoming.Shortcoming one, runs into patient and has a rest (stupor) or entourage not in case, cannot effective guarantee infusion safety.When user trusts alarm, occur that this situation is more dangerous on the contrary.Shortcoming two, even if alarm gives notice patient or entourage, patient or entourage also will go for nurse and carry out follow-up operation, and convenience does not get a promotion.Shortcoming three, detection uses same battery supply with warning, adds power consumption.If add data-transformation facility, so will certainly continue to increase power consumption, thus reduce further its flying power, reliability and stability in medical procedure.

no matter be structural non-return technology or non-return membrane technology, user all can be allowed to produce the slack psychology of paralysis, think that after using this product be safe and reliable certainly.But even if when effective non-return, non-return is only also effectively comparatively safe at short notice.If the time is slightly long, the liquid at non-return interface is in complete agravity state (be namely equivalent to actuator and shut state), because the effect of human vein pressure and liquid have the effect of phase counterdiffusion, blood still can flow in transfusion device, cannot reach blood return prevention effect thoroughly.When relaxing vigilant, objectively make non-return time lengthening, then more easily can cause the formation of thrombosis, more easily cause the generation of malpractice.Therefore non-return technology if with detection alarm combine with technique, then safety is better.

Summary of the invention

this utility model provides a kind of floatage-type non-return infusion set, overcome the deficiency of above-mentioned prior art, its special messenger that needs that effectively can solve the existence of existing transfusion device observes medicinal liquid situation, easily there is blood back phenomenon, check device uses inconvenience, liquid medicine flow is poor and shutoff situation is unstable, the problem poor for applicability of Detection Techniques and alarm technique.

the technical solution of the utility model is realized by following measures: a kind of floatage-type non-return infusion set, comprise non-return housing and float, feed pathway and liquid storage cylinder is respectively equipped with in non-return housing, the top of feed pathway is be positioned at the inlet on non-return housing, communicating passage is provided with between feed pathway and liquid storage cylinder, the bottom of liquid storage cylinder is provided with liquid outlet, be set with in the liquid storage cylinder of corresponding liquid outlet top position and float when medicinal liquid liquid level exceedes minimum and at the float of medicinal liquid liquid level lower than the also shutoff liquid outlet of falling during minimum, the non-return housing of corresponding liquid storage cylinder upper position is provided with the unidirectional only liquid breather that can communicate with liquid storage cylinder.

here is the further optimization and/or improvements to above-mentioned utility model technical scheme:

float is the magnetic float of tool, and on non-return housing, be provided with the magnetic reed switch that can sense that float floats and sinks.

the above-mentioned upper outside at non-return housing can be provided with the magnetic reed switch open in usual disconnected when can close when float floats and sink.

can there be mounting groove on the above-mentioned top at non-return housing, is provided with the magnetic reed switch open in usual disconnected when can close when float floats and sink in mounting groove.

the above-mentioned lower outside at non-return housing can be provided with the normally closed type magnetic reed switch disconnected when can close when float floats and sink.

can there be mounting groove the above-mentioned bottom at non-return housing, is provided with the normally closed type magnetic reed switch disconnected when can close when float floats and sink in mounting groove.

the above-mentioned upper outside at non-return housing can be fixed with hook, on hook, cover hangs with test card sheet, magnetic reed switch open in usual is integrated in and detects in card, detect in card and be also integrated with wireless signal transmitting device, two pins of wireless signal transmitting device and magnetic reed switch open in usual are electrically connected.

the upper outside of above-mentioned non-return housing is fixed with hook, on hook, cover hangs with test card sheet, normally closed type magnetic reed switch is integrated in and detects in card, and detect in card and be also integrated with wireless signal transmitting device, two pins of wireless signal transmitting device and normally closed type magnetic reed switch are electrically connected.

the opening of above-mentioned mounting groove can be positioned on the sidewall of non-return housing, two pins of magnetic reed switch open in usual or normally closed type magnetic reed switch all with the opening homonymy of mounting groove, be installed with in the outside of non-return housing and its mounting groove opening and two pins all can be coated on interior installation cover plate, the connection path being formed with unidirectional opening between cover plate and non-return hull outside is installed, magnetic joint is installed with by extending flexible pipe between the installation cover plate of corresponding connection path aperture position and non-return housing, be electrically connected respectively by wire between two pins of magnetic reed switch open in usual or normally closed type magnetic reed switch and each pin of magnetic joint.

above-mentioned float can be cylinder or cuboid, and the inner sealing of float is coated with the body that magnetizes.

the average density of above-mentioned float can be not more than 0.9 gram/cc.

the skid-proof rubber ring be positioned at below float can be fixed with bottom the liquid storage cylinder of above-mentioned corresponding liquid outlet upper outside position.

above-mentioned unidirectional only liquid breather can comprise aerofluxus ring taps and air-filtering membrane, the exhaust passage communicated with liquid storage cylinder is provided with on the top of non-return housing, the air vent be positioned on non-return housing is arranged at the top of exhaust passage, air vent is installed with aerofluxus ring taps, is provided with between air vent and aerofluxus ring taps and air can be made to discharge and the air-filtering membrane that medicinal liquid passes can be prevented.

bottom the bottom that the two ends of above-mentioned communicating passage can lay respectively at feed pathway and liquid storage cylinder.

this utility model reasonable and compact in structure, it is by being provided separately feed pathway and liquid storage cylinder, effectively can eliminate the active force of liquid drippage to float, and float and liquid storage cylinder gap, medicinal liquid are dripped to the restriction of runner and flow velocity, there is good non-return effect, liberation manpower, observes dropping liquid situation without the need to patient or people's moment of accompanying and attending to; And due to the density difference of different medicinal liquid less, adopt the suitability of rising and falling of buoyancy control float strong, the use of multiple-medicinal-liquid can be met, be convenient to promote; Structure is simple, easy to operate, production cost is low, and set up the magnetic reed switch that can match with the magnetic float of tool and can save the electric energy detected needed for link, make it easy to be combined with electronic device, simultaneously by non-return and warning combination can be realized double shield, medicine non-return will be realized time most at medicinal liquid, and start alert program, make medical personnel can make corresponding subsequent operation in time, this process safety is effective, and process observed by the medicinal liquid that can save patient or entourage, makes it more laborsaving.

Accompanying drawing explanation

accompanying drawing 1 is that the master of this utility model embodiment one looks perspective structure schematic diagram.

accompanying drawing 2 is that the master of this utility model embodiment two looks perspective structure schematic diagram.

accompanying drawing 3 is that the master of this utility model embodiment three looks perspective structure schematic diagram.

accompanying drawing 4 is that the master of this utility model embodiment four looks perspective structure schematic diagram.

accompanying drawing 5 is that the master of this utility model embodiment six using state looks perspective structure schematic diagram.

accompanying drawing 6 is the detonation configuration schematic diagram of accompanying drawing 5.

accompanying drawing 7 is the perspective structure schematic diagram under the using state of accompanying drawing 5 when being applied to transfusion device.

coding in accompanying drawing is respectively: 1 is non-return housing, and 2 is float, and 3 is feed pathway, and 4 is liquid storage cylinder, 5 is communicating passage, and 6 is liquid outlet, and 7 is magnetic reed switch, and 8 for installing cover plate, 9 for extending flexible pipe, and 10 is magnetic joint, and 11 is skid-proof rubber ring, and 12 is aerofluxus ring taps, 13 is air-filtering membrane, and 14 is exhaust passage, and 15 is the body that magnetizes, and 16 is wire, 17 is mounting groove, and 18 is hook, and 19 for detecting card, 20 is wireless signal transmitting device, and 21 is flow regulator, and 22 is bottle plug puncture unit.

Detailed description of the invention

this utility model by the restriction of following embodiment, can not determine concrete embodiment according to the technical solution of the utility model and practical situation.

in this utility model, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. determines according to the Butut direction of Figure of description.

below in conjunction with embodiment and accompanying drawing, this utility model is further described:

embodiment one: as shown in Figure 1, this floatage-type non-return infusion set comprises non-return housing 1 and float 2, feed pathway 3 and liquid storage cylinder 4 is respectively equipped with in non-return housing 1, the top of feed pathway 3 is be positioned at the inlet on non-return housing 1, communicating passage 5 is provided with between feed pathway 3 and liquid storage cylinder 4, the bottom of liquid storage cylinder 4 is provided with liquid outlet 6, be set with in the liquid storage cylinder 4 of corresponding liquid outlet 6 top position and float when medicinal liquid liquid level exceedes minimum and at the float 2 of medicinal liquid liquid level lower than the also shutoff liquid outlet 6 of falling during minimum, the non-return housing 1 of corresponding liquid storage cylinder 4 upper position is provided with the unidirectional only liquid breather that can communicate with liquid storage cylinder 4.According to demand, liquid outlet 6 should be positioned at the intersection area of all projections of float 2 bottom liquid storage cylinder 4, can guarantee like this float 2 be present optional position bottom liquid storage cylinder 4 time all can shutoff liquid outlet 6, in use, this utility model can be connected to the optional position in transfusion device between flow regulator 21 and bottle plug puncture unit 22, specifically can guarantee that non-return housing 1 continues to keep vertical state to be limited in use, now liquid will enter in feed pathway 3 by inlet, and enter in liquid storage cylinder 4 through communicating passage 5 thus, when being positioned at the medicinal liquid liquid level of liquid storage cylinder 4 once exceed minimum, float 2 will at buoyancy float downward, thus release liquid outlet 6, medicinal liquid will be carried downwards by liquid outlet 6, after the medicinal liquid in bottle drips off, to continue to supplement without medicinal liquid in inlet, and the medicinal liquid being positioned at liquid storage cylinder 4 will continue conveying downwards until when the liquid level of medicinal liquid is lower than minimum, float 2 will sink under gravity, and shutoff liquid outlet 6, realize its check function thus, wherein the gas unnecessary when can guarantee that medicinal liquid enters in liquid storage cylinder 4 of setting up of unidirectional only liquid breather can from discharging in it, avoid the drippage process affecting medicinal liquid because the gas in liquid storage cylinder 4 is produced counteracting force by compressing, and in the process of medicinal liquid drippage, air can enter in liquid storage cylinder 4 at any time thus, realizes pressure balance, this utility model structure is simple, easy to operate, production cost is low, and effectively can eliminate the active force of liquid drippage to float 2, and float 2 and liquid storage cylinder 4 gap, medicinal liquid are dripped to the restriction of runner and flow velocity, have good non-return effect, liberation manpower, observes dropping liquid situation without the need to patient or people's moment of accompanying and attending to, and due to the density difference of different medicinal liquid less, adopt the suitability of rising and falling of buoyancy control float 2 strong, the use of multiple-medicinal-liquid can be met, be convenient to promote, in addition when the inlet of non-return housing 1 is directly connected with puncture needle, non-return housing 1 with puncture needle also can be distributed with the inlet channel communicated with puncture needle entrance, and the air inlet of this inlet channel can be installed with the unidirectional only liquid breather that can communicate with inlet channel, air can be made like this to enter thus in Pharmaceutical container, and medicinal liquid can not flow out thus, and simplify the structure of transfusion device further, reduce production cost.

according to actual needs, above-mentioned floatage-type non-return infusion set can be made further optimization and/or improvements:

as shown in accompanying drawing 2,3,4,5,6,7, float 2 is the magnetic float 2 of tool, and on non-return housing 1, be provided with the magnetic reed switch 7 that can sense that float 2 floats and sinks.In use, incoming wireless signal discharger 20 on two pins of magnetic reed switch 7, the control station of nurse station is electrically connected with and can receives wireless signal and identify berth number and can start the reception of wireless signals alarm device of alert program after not receiving wireless signal; By magnetic to magnetic reed switch 7 and tool float 2 is combined, wireless signal transmitting device 20 is made to send the signal of normal work to reception of wireless signals alarm device when float 2 floats, wireless signal transmitting device 20 is made to send early warning signal when float 2 sinks to reception of wireless signals alarm device, and trigger alarm program thus; Or by making wireless signal transmitting device 20 send signal when float 2 floats to reception of wireless signals alarm device, make wireless signal transmitting device 20 interrupt signal when float 2 sinks launch and trigger the alert program of reception of wireless signals alarm device; Two kinds of described modes are energy trigger alarm program all, thus realizes the monitoring of medical personnel to this process, is convenient to it and makes corresponding subsequent operation in time, medical personnel namely can be made to complete in time and change dressings or pull out pin; This scheme adopts magnetic reed switch 7 can save the electric energy of detection needed for link, and be convenient to be combined with electronic device, it is by realizing double shield by non-return and warning combination, medicine non-return will be realized time most at medicinal liquid, and start alert program, make medical personnel can make corresponding subsequent operation in time, this process safety is effective, and process observed by the medicinal liquid that can save patient or entourage, makes it more laborsaving; According to demand, reception of wireless signals alarm device can adopt existing known technology.

embodiment two: as shown in Figure 2, the magnetic reed switch open in usual disconnected when the upper outside of non-return housing 1 is provided with and can closes when float 2 floats and sink.According to demand, magnetic reed switch open in usual is arranged on non-return housing 1 by modes such as pasting, adsorb, be fixing, and the actual induction scope of magnetic reed switch open in usual is positioned at when float 2 floats, be positioned at outside the actual induction scope of magnetic reed switch open in usual when float 2 sinks; In use, when float 2 floats, magnetic reed switch open in usual closes, its place circuit communication, wireless signal transmitting device 20 enters using state, and excites the start-up routine of reception of wireless signals alarm device, sends the wireless signal of normal condition to reception of wireless signals alarm device simultaneously; When medicinal liquid will be use up, float 2 sinks down into shutoff liquid outlet 6, realize non-return process, and magnetic reed switch open in usual is by instantaneous disconnection, now wireless signal transmitting device 20 will send early warning signal to reception of wireless signals alarm device, and trigger alarm program thus, enable nurse station obtain corresponding information.

as the preferred version of embodiment two, as shown in Figure 2, hook 18 is fixed with in the upper outside of non-return housing 1, on hook 18, cover hangs with test card sheet 19, magnetic reed switch open in usual is integrated in and detects in card 19, detect in card 19 and be also integrated with wireless signal transmitting device 20, wireless signal transmitting device 20 is electrically connected with two pins of magnetic reed switch open in usual.It can be made so fast easier for installation, and detection card 19 can repeatedly use, and reduces production cost.According to demand, wireless signal transmitting device 20 can adopt existing known technology, and wherein wireless signal transmitting device 20 can be passive and wireless label, specifically can be passive RFID RFID tag; Wireless signal transmitting device 20 also can be active radio label in addition, and its inside can be provided with the supply module and bluetooth module that are electrically connected.

embodiment three: as shown in Figure 3, has mounting groove 17 on the top of non-return housing 1, is provided with the magnetic reed switch open in usual disconnected when can close when float 2 floats and sink in mounting groove 17.

embodiment four: as shown in Figure 4, has mounting groove 17 in the bottom of non-return housing 1, is provided with the normally closed type magnetic reed switch disconnected when can close when float 2 floats and sink in mounting groove 17.

embodiment five: the normally closed type magnetic reed switch disconnected when the lower outside of non-return housing 1 is provided with and can closes when float 2 floats and sink.According to demand, magnetic reed switch 7 is arranged on the lower outside of non-return housing 1 by modes such as pasting, adsorb, be fixing, and be positioned at outside the actual induction scope of normally closed type magnetic reed switch when float 2 floats, the actual induction scope of normally closed type magnetic reed switch is positioned at when float 2 sinks; In use, when float 2 floats, normally closed type magnetic reed switch closes, its place circuit communication, wireless signal transmitting device 20 enters using state, and excites the start-up routine of reception of wireless signals alarm device, sends the wireless signal of normal condition to reception of wireless signals alarm device simultaneously; When medicinal liquid will be use up, float 2 sinks down into shutoff liquid outlet 6, realize non-return process, and normally closed type magnetic reed switch is by instantaneous disconnection, now wireless signal transmitting device 20 will send early warning signal to reception of wireless signals alarm device, and trigger alarm program thus, enable nurse station obtain corresponding information.

preferred version as embodiment five: the upper outside of non-return housing 1 is fixed with hook 18, on hook 18, cover hangs with test card sheet 19, normally closed type magnetic reed switch is integrated in and detects in card 19, detect in card 19 and be also integrated with wireless signal transmitting device 20, wireless signal transmitting device 20 is electrically connected with two pins of normally closed type magnetic reed switch.

embodiment six: as accompanying drawing 5, 6, shown in 7, the opening of mounting groove 17 is positioned on the sidewall of non-return housing 1, two pins of magnetic reed switch open in usual or normally closed type magnetic reed switch all with the opening homonymy of mounting groove 17, be installed with in the outside of non-return housing 1 and its mounting groove 17 opening and two pins all can be coated on interior installation cover plate 8, the connection path of unidirectional opening is formed between installing outside cover plate 8 and non-return housing 1, magnetic joint 10 is installed with by extending flexible pipe 9 between the installation cover plate 8 of corresponding connection path aperture position and non-return housing 1, be electrically connected respectively by wire 16 between two pins of magnetic reed switch open in usual or normally closed type magnetic reed switch and each pin of magnetic joint 10.Good protection can be formed to its wiring place like this, the connection of wireless signal transmitting device 20 also can be made more convenient.

preferred version as above-described embodiment: as shown in accompanying drawing 2,3,4,5,6,7, shown in, float 2 is cylinder or cuboid, and the inner sealing of float 2 is coated with the body 15 that magnetizes.Can be convenient to retrain the direction in magnetic field that float 2 produces like this, make the active force between its magnetic field and magnetic reed switch 7 more stable, and the body 15 that can prevent from magnetizing directly contacts with medicinal liquid, avoids it to have an impact to the property of medicine of medicinal liquid; According to demand, the shape of liquid storage cylinder 4 is similar to the shape of float 2.

as shown in accompanying drawing 1,2,3,4,5,6,7, the average density of float 2 is not more than 0.9 gram/cc.It can be made like this to be applicable to the medicinal liquid of all applicable human body inputs, there is the good suitability, and easy to utilize.

as shown in accompanying drawing 1,2,3,4,5,6,7, bottom the liquid storage cylinder 4 of corresponding liquid outlet 6 upper outside position, be fixed with the skid-proof rubber ring 11 be positioned at below float 2.Set up skid-proof rubber ring 11 can play buffering antidetonation effect to the sinking of float 2, simultaneously can with bottom float 2 between form good sealing and contact, strengthen performance and the stability of its non-return.

as shown in accompanying drawing 1,2,3,4,5,6,7, unidirectional only liquid breather comprises aerofluxus ring taps 12 and air-filtering membrane 13, the exhaust passage 14 communicated with liquid storage cylinder 4 is provided with on the top of non-return housing 1, the air vent be positioned on non-return housing 1 is arranged at the top of exhaust passage 14, air vent is installed with aerofluxus ring taps 12, is provided with between air vent and aerofluxus ring taps 12 and air can be made to discharge and the air-filtering membrane 13 that can prevent medicinal liquid from passing.It can be made like this excessive gas can be discharged in use, and can effectively prevent medicinal liquid from revealing thus, avoid waste.According to demand, air-filtering membrane 13 can adopt existing known technology.

as shown in accompanying drawing 1,2,3,4,5,6,7, bottom the bottom that the two ends of communicating passage 5 lay respectively at feed pathway 3 and liquid storage cylinder 4.Can guarantee that medicinal liquid enters bottom liquid storage cylinder 4 like this, avoid it to produce corresponding active force to float 2 top further, make moving up and down of float 2 have good stability.

above technical characteristic constitutes embodiment of the present utility model, and it has stronger adaptability and implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.

Claims (11)

1. a kind of floatage-type non-return infusion set, it is characterized in that comprising non-return housing and float, feed pathway and liquid storage cylinder is respectively equipped with in non-return housing, the top of feed pathway is be positioned at the inlet on non-return housing, communicating passage is provided with between feed pathway and liquid storage cylinder, the bottom of liquid storage cylinder is provided with liquid outlet, be set with in the liquid storage cylinder of corresponding liquid outlet top position and float when medicinal liquid liquid level exceedes minimum and at the float of medicinal liquid liquid level lower than the also shutoff liquid outlet of falling during minimum, the non-return housing of corresponding liquid storage cylinder upper position is provided with the unidirectional only liquid breather that can communicate with liquid storage cylinder.

2. floatage-type non-return infusion set according to claim 1, is characterized in that float is the magnetic float of tool, and on non-return housing, be provided with the magnetic reed switch that can sense that float floats and sinks.

3. floatage-type non-return infusion set according to claim 2, is characterized in that the upper outside of non-return housing is provided with the magnetic reed switch open in usual disconnected when can close when float floats and sink.

4. floatage-type non-return infusion set according to claim 2, is characterized in that mounting groove is arranged at the top of non-return housing, is provided with the magnetic reed switch open in usual disconnected when can close when float floats and sink in mounting groove.

5. floatage-type non-return infusion set according to claim 2, is characterized in that the lower outside of non-return housing is provided with the normally closed type magnetic reed switch disconnected when can close when float floats and sink.

6. floatage-type non-return infusion set according to claim 2, is characterized in that mounting groove is arranged at the bottom of non-return housing, is provided with the normally closed type magnetic reed switch disconnected when can close when float floats and sink in mounting groove.

7. floatage-type non-return infusion set according to claim 3, it is characterized in that the upper outside of non-return housing is fixed with hook, on hook, cover hangs with test card sheet, magnetic reed switch open in usual is integrated in and detects in card, detect in card and be also integrated with wireless signal transmitting device, two pins of wireless signal transmitting device and magnetic reed switch open in usual are electrically connected.

8. floatage-type non-return infusion set according to claim 5, it is characterized in that the upper outside of non-return housing is fixed with hook, on hook, cover hangs with test card sheet, normally closed type magnetic reed switch is integrated in and detects in card, detect in card and be also integrated with wireless signal transmitting device, two pins of wireless signal transmitting device and normally closed type magnetic reed switch are electrically connected.

9. floatage-type non-return infusion set according to claim 4 or 6, it is characterized in that the opening of mounting groove is positioned on the sidewall of non-return housing, two pins of magnetic reed switch all with the opening homonymy of mounting groove, be installed with in the outside of non-return housing and its mounting groove opening and two pins all can be coated on interior installation cover plate, the connection path being formed with unidirectional opening between cover plate and non-return hull outside is installed, magnetic joint is installed with by extending flexible pipe between the installation cover plate of corresponding connection path aperture position and non-return housing, be electrically connected respectively by wire between two pins of magnetic reed switch and each pin of magnetic joint.

10. floatage-type non-return infusion set according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, it is characterized in that float is cylinder or cuboid, and the inner sealing of float is coated with the body that magnetizes; Or/and the average density of float is not more than 0.9 gram/cc, or/and, be fixed with the skid-proof rubber ring be positioned at below float bottom the liquid storage cylinder of corresponding liquid outlet upper outside position; Or/and, unidirectional only liquid breather comprises aerofluxus ring taps and air-filtering membrane, the exhaust passage communicated with liquid storage cylinder is provided with on the top of non-return housing, the air vent be positioned on non-return housing is arranged at the top of exhaust passage, air vent is installed with aerofluxus ring taps, is provided with between air vent and aerofluxus ring taps and air can be made to discharge and the air-filtering membrane that medicinal liquid passes can be prevented; Or/and, bottom the bottom that the two ends of communicating passage lay respectively at feed pathway and liquid storage cylinder.

11. floatage-type non-return infusion set according to claim 9, it is characterized in that float is cylinder or cuboid, and the inner sealing of float is coated with the body that magnetizes; Or/and the average density of float is not more than 0.9 gram/cc, or/and, be fixed with the skid-proof rubber ring be positioned at below float bottom the liquid storage cylinder of corresponding liquid outlet upper outside position; Or/and, unidirectional only liquid breather comprises aerofluxus ring taps and air-filtering membrane, the exhaust passage communicated with liquid storage cylinder is provided with on the top of non-return housing, the air vent be positioned on non-return housing is arranged at the top of exhaust passage, air vent is installed with aerofluxus ring taps, is provided with between air vent and aerofluxus ring taps and air can be made to discharge and the air-filtering membrane that medicinal liquid passes can be prevented; Or/and, bottom the bottom that the two ends of communicating passage lay respectively at feed pathway and liquid storage cylinder.