CN206809504U - Infusion unit titrimeter and its precision transfusion device - Google Patents

Abstract

Technical field of medical instruments is the utility model is related to, in particular to infusion unit titrimeter and its precision transfusion device.Body interior, which is set, stops liquid component, only liquid component includes support, buoyancy device, connecting rod, spring element and the seal for blocking outage, support links together with base, connecting rod extend into the inside of support and seal links together, buoyancy device is additionally provided with connecting rod, when buoyancy caused by buoyancy device is more than the pressure of spring element, buoyancy device can the company's of drive seal move up, decoction can reserve from outage, realize the function of automatically controlling liquid level in body, after the completion of transfusion, seal can be pressed at outage by spring element again；Filter is located at inlet opening, and the first filter layer is provided with filter, and the first filter layer flows into direction parallel to liquid, so sets the first filter layer effectively to prevent bulky grain medicine from blocking the first filter layer.

Description

Infusion unit titrimeter and its precision transfusion device

Technical field

Technical field of medical instruments is the utility model is related to, is filled in particular to infusion unit titrimeter and its precision transfusion Put.

Background technology

Disposable infusion set is conventional medicine equipment at present, and it generally comprises bottle plug puncture unit, dropping funnel, flow and adjusted Device, intravenous infusion needle are saved, they are chained together by transfusion catheter.To ensure that bubble will not enter in whole infusion process In human body, the harm such as aeroembolism is otherwise easily caused, decoction flows into through bottle plug puncture unit, the outlet through dropping funnel, flows into transfusion catheter, warp Liquid medicine filter, intravenous infusion needle enter human body., it is necessary to which family members pay close attention to the liquid level of decoction during clinical transfusion, Otherwise occur infusion bottle inner liquid medicine to be totally lost and do not change infusion bottle in time or extract the phenomenon of intravenous infusion syringe, this can lead Blood backflow is caused in catheter of transfusion system or liquid level decline is too low and cause gas to cause the adverse consequences such as aeroembolism into human body.Such as Fruit patient continues to infuse, and need to fall the air-treatment in the pipeline of dropping funnel lower end, when operation is exhausted in the transfusion device used at present Dropping funnel topping up is extruded after must first dropping funnel be inverted, again puts dropping funnel just after certain liquid is filled in dropping funnel, or extracts vein Pin re-starts bleeding replacing intravenous needle and carries out venipuncture again, and both the above method is cumbersome time-consuming, adds medical care The labor intensity of personnel and the mental burden of patient.Meanwhile existing filter can not effectively in filtering liquid medicine big Grain, if bulky grain with decoction intravasation, is easily formed and blocked, while bulky grain also easily blocking filtering device, make filtering Device can not normal work.

Therefore need to provide a kind of automatic exhaust, automatic controlling liquid level, automatic liquid-stopping and can effective filtering liquid medicine transfusion Device dropping funnel and its precision transfusion device turn into those skilled in the art's important technological problems to be solved.

Utility model content

The purpose of this utility model is to provide infusion unit titrimeter and its precision transfusion device, with alleviate in the prior art without Method is vented automatically, can not automatic controlling liquid level, can not automatic liquid-stopping and filtering is not smooth or the technical problem that blocks.

A kind of infusion unit titrimeter provided by the utility model, including：Body, upper lid, only base, liquid component, gas deflation assembly And filter；

The base is connected with the body, and inlet opening and steam vent are provided with the upper lid, is set on the base There is outage；

The gas deflation assembly is located at the steam vent, it is described only liquid component be located in the body, and with the base Connection, the only liquid component includes support, buoyancy device, connecting rod, spring element and the seal for blocking the outage, described Connecting rod is stretched into the support and is connected with the seal, and runs through the spring element, the spring element be located at the support and Between the seal, one end away from the seal is provided with the buoyancy device on the connecting rod；

The filter is located at inlet opening, and the first filter layer, first filter layer one are provided with the filter Side is provided with inlet, and opposite side is provided with liquid outlet, and first filter layer flows into direction parallel to liquid.

Further, the gas deflation assembly includes blast pipe, the second filter layer and ball sealer；

The blast pipe is located at the steam vent, and second filter layer is located at the blast pipe with the ball sealer Interior, the ball sealer is located at below second filter layer, and the diameter of the ball sealer is more than the diameter of the steam vent.

Further, projection is provided with the blast pipe, second filter layer is in the projection.

Further, the support includes support bar and baffle plate, and the support bar is fixedly connected with the base, the gear Plate is located on the support bar, and the through hole passed through for the connecting rod is provided with the baffle plate.

Further, the spring element is between the seal and the baffle plate.

Further, the diameter of the spring element is less than the maximum gauge of the seal.

Further, the seal bottom is in truncated cone-shaped, is cylinder at the top of the seal, at the top of the seal Diameter is more than seal bottom maximum gauge, and seal bottom maximum gauge is not less than the discharge opeing bore dia.

Further, the chemical feed pipe for adding medicine is additionally provided with the body.

A kind of precision transfusion device provided by the utility model, including：Intravenous needle, infusion tube, bottle plug puncture unit and institute State infusion unit titrimeter；

The outage is connected by the infusion tube with the intravenous needle, and the inlet opening passes through the infusion tube It is connected with the bottle plug puncture unit.

Further, precision transfusion device also includes flow regulator, and the flow regulator is located at the infusion tube On, and below the infusion unit titrimeter.

Beneficial effect：

A kind of infusion unit titrimeter provided by the utility model, including：Body, upper lid, only base, liquid component, gas deflation assembly And filter；Base is connected with body, and inlet opening and steam vent are provided with upper lid, and decoction can enter body by inlet opening It is interior, outage is provided with base, by the control of dropping funnel, decoction can be reserved by outage, and gas deflation assembly is positioned at exhaust At hole, the excessive gas in dropping funnel can be discharged automatically, realize self-bleeding function.Set in body interior and stop liquid group Part, and be connected with base, only liquid component includes support, buoyancy device, connecting rod, spring element and the seal for blocking outage, Support is linked together with base, and connecting rod extend into the inside of support and seal links together, and connecting rod is being stretched into support During portion, while spring element is run through, spring element is located at internal stent and on seal, by between seal and spring element There is certain distance, and the raw footage of spring element is more than this segment distance, so spring element is in compressive state, while support is fixed Seal can be made to be pressed at outage on base, therefore by spring element, buoyancy device, buoyancy device are additionally provided with connecting rod One end of connecting rod is respectively disposed at seal, when liquid is flowed into dropping funnel, buoyancy device can produce buoyancy, and this buoyancy can act on On spring element, when liquid reaches a timing in dropping funnel, buoyancy caused by buoyancy device will be greater than the initial pressure of spring element, now Buoyancy device meeting drivening rod and seal move up, and decoction is reserved from outage, and realization automatically controls liquid in body The function in face, after the completion of transfusion, flow into dropping funnel decoction reduce, caused by buoyancy device buoyancy reduce, spring element can again by Seal is pressed at outage, reaches the function of automatic liquid-stopping；Filter is located at inlet opening, and wherein filter can be placed In body interior, body exterior can also be placed on, the first filter layer is provided with filter, the first filter layer side is provided with Inlet, opposite side are provided with liquid outlet, and inlet is separated i.e. decoction with liquid outlet and entered by inlet by the first filter layer Enter, then pass through the first filter layer, then reserved from liquid outlet, the first filter layer flows into direction parallel to liquid, so sets One filter layer can effectively prevent bulky grain medicine from blocking the first filter layer, ensure the flowing of decoction.

A kind of precision transfusion device provided by the utility model, including：Intravenous needle, infusion tube, bottle plug puncture unit and defeated Liquid device dropping funnel, outage are connected by infusion tube with intravenous needle, and inlet opening is connected by infusion tube with bottle plug puncture unit, essence Close infusion device has above-mentioned advantage compared with prior art.

Brief description of the drawings

, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the structural representation for the infusion unit titrimeter that the utility model embodiment provides；

Fig. 2 is the structural representation of filter in Fig. 1；

Fig. 3 is the structural representation that Fig. 1 stops liquid component；

Fig. 4 is the front view that Fig. 3 stops liquid component；

Fig. 5 is the structural representation that figure is gas deflation assembly in Fig. 1；

Fig. 6 is the schematic diagram of body in Fig. 1, upper lid and base；

Fig. 7 is the structural representation for the precision transfusion device that the utility model embodiment provides；

Fig. 8 is the top view of precision transfusion device in Fig. 6.

Icon：100- bodies；Covered on 101-；102- inlet openings；103- steam vents；104- outages；200- bottoms Seat；300- stops liquid component；301- supports；3011- support bars；3012- baffle plates；3013- through holes；302 buoyancy devices；303- Connecting rod；304- spring elements；305- seals；400- gas deflation assemblies；401- blast pipes；The filter layers of 402- second；403- Ball sealer；500- filters；The filter layers of 501- first；502- inlets；503- liquid outlets；600- intravenous needles；700- Infusion tube；800- bottle plug puncture units；900- flow regulators.

Embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality Novel protected scope.

, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

The utility model is described in further detail below by specific examples of the implementation and with reference to accompanying drawing.

Fig. 1 is the structural representation for the infusion unit titrimeter that the utility model embodiment provides；Fig. 2 is filter 500 in Fig. 1 Structural representation；Fig. 3 is the structural representation that Fig. 1 stops liquid component；Fig. 4 is the front view that Fig. 3 stops liquid component；Fig. 5 is Figure is the structural representation of gas deflation assembly in Fig. 1；Fig. 6 is the schematic diagram of body, upper lid 101 and base in Fig. 1；

As Fig. 1-Fig. 6 be the utility model embodiment provide a kind of infusion unit titrimeter, including：Body 100, base 200th, liquid component 300 and gas deflation assembly 400 are stopped；Base 200 is connected with body 100, and the He of inlet opening 102 is provided with body 100 Steam vent 103, outage 104 is provided with base 200；Gas deflation assembly 400 is located at steam vent 103, and only liquid component 300 is located at In body 100, and it is connected with base 200, only liquid component 300 includes support 301, buoyancy device 302, connecting rod 303, spring element 304 With the seal 305 for blocking outage 104, connecting rod 303 is stretched into support 301 and is connected with seal 305, and runs through elastic force Part 304, spring element 304 is between support 301 and seal 305, and one end away from seal 305 is set on connecting rod 303 There is buoyancy device 302.

A kind of infusion unit titrimeter provided by the utility model, including：Body 100, upper lid 101, only base 200, liquid component 300th, gas deflation assembly 400 and filter 500；Base 200 is connected with body 100, and inlet opening 102 and row are provided with upper lid 101 Stomata 103, decoction can be entered in body 100 by inlet opening 102, outage 104 are provided with base 200, passes through dropping funnel Control, decoction can be reserved by outage 104, and gas deflation assembly 400 is located at steam vent 103, can be automatically by dropping funnel Excessive gas discharge, realize self-bleeding function.Set inside body 100 and stop liquid component 300, and connected with base 200 Connect, only liquid component 300 includes support 301, buoyancy device 302, connecting rod 303, spring element 304 and seal 305, support 301 and bottom Seat 200 links together, and connecting rod 303 extend into the inside of support 301 and seal 305 links together, and connecting rod 303 is stretching into During 301 inside of support, while running through spring element 304, spring element 304 is located at the inside of support 301 and on seal 305, There is certain distance between seal 305 and spring element 304, and the raw footage of spring element 304 is more than this segment distance, so spring element 304 are in compressive state, while support 301 is integrally fixed on base 200, therefore can make seal 305 by spring element 304 It is pressed at outage 104, buoyancy device 302, buoyancy device 302 and the company of being respectively disposed at of seal 305 is additionally provided with connecting rod 303 One end of bar 303, when liquid is flowed into dropping funnel, buoyancy device 302 can produce buoyancy, and this buoyancy can be acted on spring element 304, When liquid reaches a timing in dropping funnel, buoyancy caused by buoyancy device 302 will be greater than the initial pressure of spring element 304, now buoyancy The meeting drivening rod 303 of device 302 and seal 305 move up, and decoction is reserved from outage 104, after the completion of transfusion, The decoction for flowing into dropping funnel is reduced, and buoyancy caused by buoyancy device 302 reduces, and spring element 304 can be again by the row of being pressed on of seal 305 At fluid apertures 104, reach the function of automatic liquid-stopping；Filter 500 is located at inlet opening 102, and wherein filter 500 can be placed on It inside body 100, can also be placed on outside body 100, the first filter layer 501, the first filter layer are provided with filter 500 501 sides are provided with inlet 502, and opposite side is provided with liquid outlet 503, and the first filter layer 501 is by inlet 502 and liquid outlet 503 separate i.e. decoction is entered by inlet 502, then passes through the first filter layer 501, then reserved from liquid outlet 503, first Filter layer 501 flows into direction parallel to liquid, so sets the first filter layer 501 effectively to prevent bulky grain medicine from blocking First filter layer, ensure the flowing of decoction.

It is pointed out that body 100 and base 200 in production not together with produce, but individually produce Out, it is subsequently connected together, will be placed on beneficial to by only liquid component 300 in body 100.

It may also be noted that support 301 is fixed on base 200, and inside body 100.

It may also be noted that one end of connecting rod 303 is provided with buoyancy device 302, the other end is stretched into support 301 with sealing Part 305 connects.

It may also be noted that connecting rod 303 when stretching into 301 inside of support, can pass through the elastic force being arranged in support 301 Part 304, while spring element 304 is between seal 305 and support 301, and spring element 304 is in compressive state.

It may also be noted that support 301 is fixed on base 200, connecting rod 303 connects buoyancy device 302 and seal 305, by buoyancy device 302, connecting rod 303 and seal 305 can move, therefore when setting spring element 304, in spring element 304 pressure lower seal 305 can seal outage 104, realize the function of stopping liquid.

It may also be noted that when transfusion, decoction can be flowed into body 100, when decoction reaches certain in body 100 During height, buoyancy device 302 can produce certain buoyancy, and buoyancy device 302 can give seal 305 1 upward buoyancy, while bullet Power part 304 can give seal 305 1 downward pressure, and when the liquid level rise of decoction, buoyancy can gradually increase, and work as buoyancy device When 302 buoyancy is more than the pressure of spring element 304, buoyancy device 302 can move up with dynamic seal 305, open outage 104, decoction can reserve from outage 104, and now buoyancy can reach an equalization point with pressure, keep the normal of outage 104 Open state, after transfusion terminates, the decoction in body 100 can be reduced, and now buoyancy can reduce caused by buoyancy device 302, when floating When power is less than pressure, spring element 304 again can depress seal 305, and seal 305 and outage 104 are compressed, and realize certainly The function of dynamic only liquid, avoids user from the phenomenon of backflow of blood occur.

It may also be noted that flow into decoction in the body 100, when the buoyancy device 302 is increased with dynamic seal 305, medicine Liquid energy is enough flowed out by outage 104, and decoction is entered from outage 104 from inlet opening 102 to flow out, and during which keeps buoyancy device 302 normal work, while the liquid level of decoction can be automatically controlled, reach a stationary value.

It may also be noted that gas deflation assembly 400 is set at steam vent 103, can be by the excessive gas in transfusion device Discharge in time, realizes automatic ventilating function.

In the alternative of the present embodiment, gas deflation assembly 400 includes blast pipe 401, the second filter layer 402 and ball sealer 403；Blast pipe 401 is located at steam vent 103, and the second filter layer 402 is located in blast pipe 401 with ball sealer 403, ball sealer 403 positioned at the lower section of the second filter layer 402, and the diameter of ball sealer 403 is more than the diameter of steam vent 103.

Gas deflation assembly 400 is arranged at steam vent 103, i.e., gas deflation assembly 400 can be arranged on inside body 100, also may be used To be arranged on outside body 100, gas deflation assembly 400 includes blast pipe 401, the second filter layer 402 and ball sealer 403, the second mistake Filtering layer 402 is asked with sealing and is arranged inside blast pipe 401, and ball sealer 403 is located at the lower section of the second filter layer 402, avoids filling Ball sealer 403 drops away when putting inversion.

It is pointed out that the diameter of ball sealer 403 is more than the diameter of steam vent 103, ball sealer 403 can lean on itself On steam vent 103, side is now if unnecessary gas cannot discharge gravity pressure, it is possible to which gas is input into user's body It is interior, serious consequence can be caused, when gas is excessive in body 100, by being computed correctly, pressure can caused by excessive gas Ball sealer 403 is opened on top, and gas can discharge from steam vent 103, makes air pressure of the inside of body 100 in a balance, will not to Family impacts, that is, realizes self-bleeding function.

In the alternative of the present embodiment, projection is provided with blast pipe 401, the second filter layer 402 is in projection.

Second filter layer 402 and ball sealer 403 are respectively positioned in blast pipe 401, if the second filter layer 402 is slided because of vibration Fall, ball sealer 403 can be pushed down, thus can not timely discharge the excessive gas inside body 100, it will cause serious Consequence, so setting projection on the inwall of blast pipe 401, the second filter layer 402 is arranged in projection, second can be avoided Filter layer 402 is inadvertently fallen off, it is ensured that equipment it is safe to use.

In the alternative of the present embodiment, support 301 includes support bar 3011 and baffle plate 3012, support bar 3011 and base 200 are fixedly connected, and baffle plate 3012 is located on support bar 3011, and the through hole passed through for connecting rod 303 is provided with baffle plate 3012 3013。

Support 301 is fixedly connected with base 200, and for support link 303, wherein bearing includes support bar 3011 and baffle plate 3012, support bar 3011 is fixedly connected with baffle plate 3012, and support bar 3011 is fixedly connected with base 200, is set on baffle plate 3012 There is through hole 3013, connecting rod 303 passes through this through hole 3013 when stretching into 301 inside of support, plays certain Auxiliary support effect.

It is pointed out that the purpose for setting baffle plate 3012 is not influence moving up and down for connecting rod 303 and buoyancy device 302.

In the alternative of the present embodiment, spring element 304 is between seal 305 and baffle plate 3012.

Support 301 includes support bar 3011 and baffle plate 3012, and support frame is fixedly connected with base 200, i.e., baffle plate 3012 is Fixed, for spring element 304 between baffle plate 3012 and seal 305, spring element 304 now is in compressive state, Spring element 304 can be to baffle plate 3012 and the pressure of seal 305, because baffle plate 3012 is fixed, and seal 305 is can be with Move up and down, therefore spring element 304 can oppress seal 305 and move down, until seal 305 and outage 104 are close Contact, realize the function of only liquid.

It may also be noted that two baffle plates 3012 are set, between existing necessarily between two baffle plates 3012 on support bar 3011 Away from because connecting rod 303 is relatively thin, passing through the constraint of two baffle plates 3012, it is possible to increase the bulk strength of structure, prevent connecting rod 303 from going out Now rock, so as to improve the sealing effectiveness of seal 305.

In the alternative of the present embodiment, the diameter of spring element 304 is less than the maximum gauge of seal 305.

The one end of spring element 304 is against on baffle plate 3012, and one end is against on seal 305, to ensure that spring element 304 can be opened Between baffle plate 3012 and seal 305, it is therefore desirable to be more than spring element 304 by what the maximum gauge of seal 305 designed Maximum gauge.

In the alternative of the present embodiment, the bottom of seal 305 is in truncated cone-shaped, and the top of seal 305 is cylinder, is sealed The top diameter of part 305 is more than the bottom maximum gauge of seal 305, and the bottom maximum gauge of seal 305 is straight not less than outage 104 Footpath.

Seal 305 is made up of two parts, and a part is the cylinder being relatively large in diameter, and a part is provided in below cylinder The less round platform of diameter, when seal 305 and outage 104 coordinate, round platform coordinates with cylinder with outage 104, can Realize the double-enclosure of cylinder, round platform, it is ensured that sealing.

In the alternative of the present embodiment, the chemical feed pipe for adding medicine is additionally provided with body 100.

When needing to input multi-medicament simultaneously, other drugs can be injected directly into transfusion bottle, can also be in dropping funnel Upper setting chemical feed pipe, other drugs are filled by chemical feed pipe.

Fig. 7 is the structural representation for the precision transfusion device that the utility model embodiment provides；Fig. 8 is accurate defeated in Fig. 6 The top view of liquid device.

As Fig. 7-Fig. 8 be the utility model embodiment provide a kind of precision transfusion device, including：It is intravenous needle 600, defeated Liquid flexible pipe 700, bottle plug puncture unit 800 and infusion unit titrimeter；Outage 104 is connected by infusion tube 700 with intravenous needle 600, Inlet opening 102 is connected by infusion tube 700 with bottle plug puncture unit 800.

A kind of precision transfusion device provided by the utility model, including：Intravenous needle 600, infusion tube 700, bottle stopper puncture Device 800 and infusion unit titrimeter, outage 104 are connected by infusion tube 700 with intravenous needle 600, and inlet opening 102 is soft by infusing Pipe 700 is connected with bottle plug puncture unit 800, and precision transfusion device has above-mentioned advantage compared with prior art.

In the alternative of the present embodiment, precision transfusion device also includes flow regulator 900, flow regulator 900 In on infusion tube 700, and below infusion unit titrimeter.

By setting flow regulator 900, flow rate of liquid when can adjust transfusion, avoid caused by flow velocity is too fast to user Injury.

Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly The scope of each embodiment technical scheme of type.

Claims (10)

1. A kind of 1. infusion unit titrimeter, it is characterised in that including：Body, upper lid, base, only liquid component, gas deflation assembly and filtering Device；

   The base is connected with the body, is provided with inlet opening and steam vent on the upper lid, the row of being provided with the base Fluid apertures；

   The gas deflation assembly is located at the steam vent, and the only liquid component is located in the body, and is connected with the base, The only liquid component includes support, buoyancy device, connecting rod, spring element and the seal for blocking the outage, the connecting rod Stretch into the support and be connected with the seal, and run through the spring element, the spring element be located at the support with it is described Between seal, one end away from the seal is provided with the buoyancy device on the connecting rod；

   The filter is located at inlet opening, and the first filter layer is provided with the filter, and the first filter layer side is set Inlet is equipped with, opposite side is provided with liquid outlet, and first filter layer flows into direction parallel to liquid.
2. 2. infusion unit titrimeter according to claim 1, it is characterised in that the gas deflation assembly includes blast pipe, the second mistake Filtering layer and ball sealer；

   The blast pipe is located at the steam vent, and second filter layer is located in the blast pipe with the ball sealer, institute State ball sealer to be located at below second filter layer, the diameter of the ball sealer is more than the diameter of the steam vent.
3. 3. infusion unit titrimeter according to claim 2, it is characterised in that it is provided with projection in the blast pipe, described Two filter layers are in the projection.
4. 4. infusion unit titrimeter according to claim 2, it is characterised in that the support includes support bar and baffle plate, described Support bar is fixedly connected with the base, and the baffle plate is located on the support bar, and is provided with the baffle plate for the company The through hole that bar passes through.
5. 5. infusion unit titrimeter according to claim 4, it is characterised in that the spring element is located at the seal and described Between baffle plate.
6. 6. infusion unit titrimeter according to claim 1, it is characterised in that the diameter of the spring element is less than the seal Maximum gauge.
7. 7. infusion unit titrimeter according to claim 6, it is characterised in that the seal bottom is in truncated cone-shaped, described close It is more than seal bottom maximum gauge, the seal bottom at the top of sealing for cylinder, the seal top diameter Maximum gauge is not less than the discharge opeing bore dia.
8. 8. infusion unit titrimeter according to claim 7, it is characterised in that be additionally provided with the body for adding medicine Chemical feed pipe.
9. A kind of 9. precision transfusion device, it is characterised in that including：Intravenous needle, infusion tube, bottle plug puncture unit and claim Infusion unit titrimeter described in any one of 1-8；

   The outage is connected by the infusion tube with the intravenous needle, and the inlet opening passes through the infusion tube and institute State bottle plug puncture unit connection.
10. 10. precision transfusion device according to claim 9, it is characterised in that also adjusted including flow regulator, the flow velocity Section device is located on the infusion tube, and below the infusion unit titrimeter.