CN105477750B - Disposable automatic liquid-stopping transfusion apparatus - Google Patents

Abstract

The invention relates to an automatic liquid-stopping infusion device, the safety mechanism of which includes a buoyant liquid-stopping device inside a dripping funnel, the buoyant liquid-stopping device is composed of a floating body, a double-folded convex liquid-sealing part and a connecting part, the connecting part and the double-closed The sealing diaphragm of the double-folding convex liquid-sealing parts is suitable for the installation of double-folding convex-type liquid-sealing parts. The diameter of the liquid stop column core is adapted to the size and diameter of the liquid outlet nozzle, which is used to block the liquid outlet, and combined with the sealing diaphragm to achieve a double liquid stop effect. When the infused liquid is almost finished, as the liquid level in the infusion set lowers, the buoyant liquid stopping device sinks and blocks the liquid outlet of the infusion set, thereby achieving the effect of stopping the liquid. The invention has reasonable design principle, simple structure and simple processing, can be widely assembled on existing infusion sets, adds a safety protection function to the infusion set, and plays the role of safe infusion.

Description

Disposable automatic liquid stop infusion set

Technical field:

The invention relates to a disposable medical appliance, in particular to a disposable automatic stop liquid transfusion device.

Background technique:

As we all know, my country has promoted the use of ordinary disposable infusion sets since the 1980s, and has a history of more than 30 years. It has played a positive role in preventing cross-infection in clinical infusions; There are certain shortcomings: when the infusion is completed or the infusion group is alternated, the air is easy to enter the infusion hose. If the treatment is not timely, the air input into the human body will have an impact on the patient's health; it also increases the care of the medical staff. The intensity of work can easily lead to doctor-patient disputes; therefore people expect to have a safer and more effective product, so that the majority of medical staff and patients can use it safely and safely; in order to solve the above-mentioned technical problems, some existing technologies such Technical solutions such as:

The Chinese patent No. "CN200810048699" discloses a safety infusion set, which is used for intravenous infusion in the medical and health field; The mechanism includes a plastic foam floating ball in the funnel. When the liquid in the funnel runs out, the floating ball will block the liquid outlet at the lower part of the funnel to achieve the purpose of safe use.

Chinese Patent No. "200320129365.1" discloses a disposable pressure-maintaining infusion set, which is used for intravenous infusion in the medical and health field; Composed of intravenous infusion needle, drip funnel and safety mechanism, the safety mechanism includes a raised medicinal liquid inlet channel at the lower part of the wine funnel, a limit piece in the middle and lower part of the drip funnel, a floating body in the middle, and a latex embedded in the floating body and diaphragms made of other soft materials.

Chinese Patent No. "CN201120280062" discloses a safety infusion set, which is used for intravenous infusion in the medical and health field; the infusion set is composed of a sequentially connected liquid inlet tube, a Murphy's dropper and a liquid outlet tube, wherein The safety mechanism includes a Murphy's dropper with a conical lower end. A float corresponding to the shape of the lower end is arranged inside the Murphy's dropper. The diameter of the largest cross-section of the float is larger than the inner diameter of the liquid outlet pipe, and the density of the float is smaller than that of the liquid medicine. When there is medicine liquid in the Murphy dropper, the float is suspended on the liquid surface, and the float will drop with the drop of the liquid level. When the liquid drop is empty, the float is just at the lower end of the Murphy dropper. The access can effectively prevent air from entering the patient's body. Therefore, the infusion set of the present invention can automatically close the infusion line by means of the floating body in the safety mechanism, preventing air bubbles from entering the patient's vein.

The above-mentioned patents generally have the following deficiencies in practical applications: First, the seal between the floating body and the liquid outlet at the bottom of the dropping funnel or the liquid outlet at the bottom of the housing is sealed by contacting the sealing diaphragm on the plane, and the sealing film When there is a certain space inside the tablet and the floating body, air bubbles are likely to be generated when the infusion alternates; secondly, when the liquid is stopped by the plugging method, the accuracy of the seal between the floating body and the liquid outlet at the bottom of the dropping funnel is high, and the existing production The process is difficult to meet the requirements of complete sealing, resulting in low sealing reliability and low safety; third, when the liquid is stopped by the membrane sealing method, the sealing diaphragm must be designed to be thinner in order to effectively wrap the sealing outlet, making the practical Because the protruding end of the outlet portion of the liquid medicine easily pierces the film sheet, resulting in inability to seal.

Invention content:

The purpose of the present invention is to provide a one-time-use automatic liquid-stopping infusion device for the purpose of controlling the liquid or air from entering the human body and preventing blood backflow when the liquid in the infusion bottle is transfused, so as to realize safe infusion.

The present invention realizes the purpose of the invention by adopting the following technical scheme: a disposable automatic stop liquid infusion device, which consists of a bottle stopper puncturer 1, a dropper 2, a dropper 3, a hose 4, a flow regulator 5, a medicine The liquid filter 6, the connector 7, and the intravenous infusion needle 8 are composed of the dripping funnel 3 consisting of the dripping funnel upper cover 3-1, the dripping funnel body 3-2, the dripping funnel lower support 3-3, and the buoyancy liquid stop device 3-4 , limiting parts 3-5; bottle stopper piercer 1 is connected to intravenous infusion needle 8 through dropper 2, dropper 3, hose 4, flow regulator 5, liquid medicine filter, connector 7; The cover 3-1 is provided with a liquid inlet pipe 3-1-1, a dosing hole 3-1-2, and a liquid outlet 3-3-1 and a liquid outlet 3-3 are provided on the lower support 3-3 of the dropping funnel. 3-2; the inner lower end of the dropping funnel body 3-2 is provided with a limiter 3-5, and a buoyancy liquid stop device 3-5 is provided between the lower part of the limiter 3-5 and the upper part of the liquid outlet 3-3-2 4.

In order to realize the installation limit function of the double folded convex liquid sealing part 3-4-2, the present invention designs the double folded convex liquid seal part 3-4-2 as a hat top 3-4-2-1, sealing Diaphragm 3-4-2-2 and liquid stop core 3-4-2-3 are three parts; and the cap top 3-4-2-1 is on the upper part, and the sealing diaphragm 3-4-2-2 is on the The middle part and the liquid-stopping column core 3-4-2-3 are installed in the lower part with a double folded convex structure.

In order to realize the function of fitting and installing the connecting part 3-4-3 and the double-folding convex liquid-sealing part 3-4-2 in the present invention, the cap top 3-4 on the double-folding convex liquid-sealing part 3-4-2 -2-1 can be provided with an inner concave part for being inserted into the connecting part 3-4-3, and can also be provided with a solid protruding part, and the protruding part is used for inserting into the inner hole core of the connecting part 3-4-3, so that The double folded convex liquid sealing part 3-4-2 can be combined with the floating body 3-4-1 as an integral part to achieve the functions of fixing the floating body 3-4-1 and stopping liquid.

In order to realize the sealing function of the double folded convex liquid sealing part 3-4-2 in the present invention, the surrounding edges of the sealing diaphragm 3-4-2-2 of the double folded convex liquid seal part 3-4-2 protrude and It can cover the liquid outlet, and can be designed to be turned into a sky pot shape in the direction of the liquid inlet 3-1-1, or it can be turned into an umbrella shape in the direction of the liquid outlet 3-3-2 to facilitate sealing and exhaust; Its material is preferably made of absorbent silica gel pad material, which has excellent sealing effect, realizes automatic liquid stop, and is used to supplement the liquid stop function; the liquid stop column core 3- The diameter of 4-2-3 is suitable for the size and diameter of the liquid outlet 3-3-2, and is used to block the liquid outlet 3-3-2, the liquid stop core 3-4-2-3 and the sealing diaphragm The combination of 3-4-2-2 realizes the plugging of the outlet liquid, so as to achieve the effect of double stop liquid.

In order to realize the function of ensuring that the medicinal liquid normally passes through the floating body 3-4-1 during the infusion process, the present invention is provided with a liquid passage tank 3-4-1-1 and a flow surface 3-4-1-2; 1. There are 2-8 liquid-passing tanks 3-4-1-1 on the periphery of the upper part; each liquid-passing tank 3-4-1-1 is provided with a flow-through surface 3-4-1-2 at the lower end; The liquid passes through the overflow surface to the bottom surface of the lower support 3-3 of the drip funnel, and then recoils back to form a recoil force to make the buoyancy liquid stop device 3-4 float up, so as to prevent the infusion situation from being unable to recover due to too tight plugging when changing the bottle; The liquid tank 3-4-1-1 can be in different shapes such as U-shaped, I-shaped, and straight, and the flow surface 3-4-1-2 can be in different shapes such as arcs and squares; because the liquid flow tank 3- The changes of different shapes of 4-1-1 and flow surface 3-4-1-2 make the floating body 3-4-1 have other different shapes accordingly.

In order to realize the function of limiting the position of the buoyancy liquid stop device 3-4 so that it can only float up and down, the present invention is provided with a limiter 3-5; the limiter 3-5 is arranged at the inner lower end of the dropping funnel body 3-3; the floating body 3-4-1 is located between the lower part of the limiting member 3-5 and the upper part of the liquid outlet 3-3-2.

Due to the adoption of the above technical scheme, the present invention better realizes the purpose of the invention. The disposable automatic stop liquid infusion set adopts the method of inserting the liquid stop core into the liquid outlet nozzle to block the liquid and the sealing diaphragm flexible wrapping out. The liquid stop design combined with the liquid port and nozzle can avoid the adverse effect of simply blocking the stop liquid and air leakage and the film seal liquid stop is easy to break, forming a double safe liquid stop effect. At the same time, a liquid passage is designed on the side wall of the upper part of the floating body as a channel for the liquid medicine. There is a flow surface at the lower end of each liquid passage. When changing the infusion set, squeeze the dripping funnel, and the liquid passes through the flowing surface to the bottom of the dripping funnel. The bottom surface then recoils back to form a recoil force to make the buoyancy liquid stop device float up; the buoyancy liquid stop device rises and falls with the liquid level, and under the limit of the limit piece, it floats vertically up and down to prevent left and right swing deviation, which can effectively buffer the mobile infusion vibration, and also avoid adverse consequences caused by component collision and agitation of the clarified liquid surface; Blockage, achieve the purpose of automatic liquid stop, improve the safety factor of infusion, reduce the nursing work intensity of medical staff, as well as the tension and fear of patients, and realize safe and effective infusion.

Description of drawings:

Accompanying drawing 1 is the overall structure schematic diagram of the present invention.

Accompanying drawing 2 is the schematic cross-sectional structure diagram of the mark 3 of the present invention.

Accompanying drawing 3 is the cut-away structure schematic diagram of mark 3 of the present invention.

Accompanying drawing 4 is the cross-sectional schematic diagram of the installation structure of markers 3-1, 3-2, 3-3 and 3-5 of the present invention.

Accompanying drawing 5 is the structure diagram of mark 3-4 of the present invention.

Accompanying drawing 6A is the schematic cross-sectional structure diagram of mark 3-4 of the present invention.

Figure 6B is a schematic diagram of different cross-sectional structures of double-folded convex liquid-sealing components marked 3-4 in the present invention.

Accompanying drawing 7 is the structure diagram of 3-4-1, 3-4-3 in the mark 3-4 buoyancy liquid stop device of the present invention.

Accompanying drawing 8 is the schematic cross-sectional structure diagram of 3-4-1 and 3-4-3 in the buoyancy liquid stop device marked 3-4 of the present invention.

Accompanying drawing 9 is the structure schematic diagram of mark 3-4-2 of the present invention.

Accompanying drawing 10A is the schematic cross-sectional structure diagram of the mark 3-4-2 of the present invention.

Figure 10B is a schematic diagram of different cross-sectional structures of the sealing diaphragm marked 3-4-2 of the present invention.

Accompanying drawing 11 is the cut-away structure schematic diagram of mark 3-5 of the present invention.

Refer to the table on the last page of the specification for the description of reference signs.

Detailed ways:

Below in conjunction with accompanying drawing, content of the invention will be further described:

Example 1:

It can be seen from the content of the invention that a disposable automatic stop liquid infusion device is composed of a cork piercer 1, a dropper 2, a dropper 3, a hose 4, a flow regulator 5, a liquid medicine filter 6, and a connector 7 , intravenous infusion needle 8, wherein the drip funnel 3 is composed of the drip funnel upper cover 3-1, the drip funnel body 3-2, the drip funnel lower support 3-3, the buoyancy liquid stop device 3-4, and the limit piece 3-5 The cork puncturer 1 is connected with the intravenous infusion needle 8 through the dropper 2, the dropper 3, the flexible pipe 4, the flow regulator 5, the liquid medicine filter 6, the connector 7; the dropper upper cover 3-1 is provided with The liquid inlet 3-1-1 and the dosing hole 3-1-2 are provided with a liquid outlet joint 3-3-1 and a liquid outlet 3-3-2 on the lower support 3-3 of the dripping funnel; the dripping funnel body The lower end of 3-2 is provided with a limiter 3-5, and a buoyancy liquid stop device 3-4 is provided between the lower part of the limit member 3-5 and the upper part of the liquid outlet 3-3-2; the buoyancy liquid stop device 3 -4 consists of the connecting part 3-4-3, the double folded convex liquid sealing part 3-4-2 and the floating body 3 with the liquid tank 3-4-1-1 and the flow surface 3-4-1-2 -4-1 composition.

The bottle stopper puncturer 1, dropper 2, dropper 3, hose 4, flow regulator 5, liquid medicine filter 6, connector 7, and intravenous infusion needle 8 of the present invention are conventional configuration parts of the infusion set.

The dropping funnel 3 of the present invention is a safety function feature part of the infusion set, and the safety function feature part is internally provided with a device that can control the liquid or air from entering the human body and prevent blood backflow when the liquid in the infusion bottle is transfused. security controls.

The dropping funnel upper cover 3-1 of the present invention refers to: the upper cover of the dropping funnel 3; and the upper cover 3-1 is provided with a liquid inlet 3-1-1 and a dosing hole 3-1-2; Its function is that the liquid enters the pot body during infusion and injects medicine safely and conveniently; its cross-sectional structure is shown in Figure 2, its cut-away structure is shown in Figure 3, and its design positions are marked in Figures 2, 3, and 4 3-1 shown.

The liquid inlet 3-1-1 of the present invention refers to: the liquid inlet pipe that is located on the dropping funnel upper cover 3-1; Its function is the flexible pipe that the liquid enters the dropping funnel; Its design position is as accompanying drawing 2, 3 shown in the mark 3-1-1.

The dosing hole 3-1-2 of the present invention refers to: the dosing port located on the top cover 3-1 of the dropping funnel; its function is to inject medicine safely and conveniently; its design position is as shown in accompanying drawings 2 and 3 Shown in Mark 3-1-2.

The dripping funnel body 3-2 of the present invention refers to: the body of the dripping funnel 3; its function is to carry liquid during infusion; its design position is shown in the mark 3-2 in accompanying drawing 2,3,4,11.

The lower holder 3-3 of the dropping funnel of the present invention refers to: the lower bottom of the dropping funnel 3; and a liquid outlet joint 3-3-1 and a liquid outlet 3-3-2 are arranged on it; its function is to limit The position of the buoyancy liquid stop device 3-4 and the outlet of the liquid medicine; its cross-sectional structure is as shown in accompanying drawing 2, its cut-away structure is as shown in accompanying drawing 3, and its design position is as marked 3- in accompanying drawing 2, 3, 4 3.

The buoyancy liquid stop device 3-4 of the present invention refers to: a connecting part 3-4-3, a double folded convex liquid sealing part 3-4-2 and a liquid passing tank 3-4-1-1, The floating body 3-4-1 of the overflow surface 3-4-1-2 is composed of floating body 3-4-1; its function is to float the normal infusion during infusion, and can control the liquid or air from entering the human body and prevent blood backflow when the liquid is infused; its cross-sectional structure As shown in accompanying drawing 2, its cut-away structure is shown in accompanying drawing 3, and its design position is shown in marking 3-4 in accompanying drawing 2, 3.

The liquid outlet joint 3-3-1 of the present invention refers to: the liquid outlet pipe located at the bottom of the dripping funnel lower support 3-3; its function is the hose for the liquid to come out from the dripping funnel; its design position is as shown in Figure 2 , 3 as shown in the mark 3-3-1.

The liquid outlet 3-3-2 of the present invention refers to: the medicinal liquid circulation channel raised by the lower holder 3-3 of the dropping funnel, which is connected to the liquid outlet inner pipe on the top of the liquid outlet joint 3-3-1; its function is When the transfusion is completed, it is adapted to cooperate with the buoyancy liquid stop device 3-4 to block the liquid outlet 3-3-2.

Example 2:

In order to realize the installation limit function of the double folded convex liquid sealing part 3-4-2, the present invention designs the double folded convex liquid seal part 3-4-2 as a hat top 3-4-2-1, sealing Diaphragm 3-4-2-2 and liquid stop core 3-4-2-3 are three parts; and the cap top 3-4-2-1 is on the upper part, and the sealing diaphragm 3-4-2-2 is on the The middle part and the liquid-stopping column core 3-4-2-3 are installed in the lower part with a double folded convex structure.

The double folded convex liquid sealing part 3-4-2 of the present invention refers to: the device that realizes the sealing effect at the lower part of the buoyancy liquid stopping device 3-4; Diaphragm 3-4-2-2, liquid stop core 3-4-2-3; its function is to cooperate with liquid outlet 3-3-2 to form a sealing structure; its structure is shown in Figure 9, and its cross-sectional structure As shown in accompanying drawing 10A, 10B; Its design position is as shown in accompanying drawing 2,3,5,6A, 6B mark 3-4-2.

Example 3:

In order to realize the function of fitting and installing the connecting part 3-4-3 and the double-folding convex liquid-sealing part 3-4-2 in the present invention, the cap top 3-4 on the double-folding convex liquid-sealing part 3-4-2 -2-1 can be provided with an inner concave part for being inserted into the connecting part 3-4-3, and can also be provided with a solid protruding part, and the protruding part is used for inserting into the inner hole core of the connecting part 3-4-3, so that The double folded convex liquid sealing part 3-4-2 can be combined with the floating body 3-4-1 as an integral part to achieve the functions of fixing the floating body 3-4-1 and stopping liquid.

The cap top 3-4-2-1 of the present invention refers to: the upper layer of the double folded convex liquid sealing part 3-4-2, and its function is to insert or insert the connecting part 3-4-3, so that the double The folded convex liquid sealing part 3-4-2 can be combined with the floating body 3-4-1 as an integral part to achieve the functions of fixing the floating body 3-4-1 and stopping the liquid; its design position is shown in Figures 9, 10A, Marked 3-4-2-1 in 10B.

Example 4:

In order to realize the sealing function of the double folded convex liquid sealing part 3-4-2 in the present invention, the surrounding edges of the sealing diaphragm 3-4-2-2 of the double folded convex liquid seal part 3-4-2 protrude and It can cover the liquid outlet, and can be designed to be turned into a sky pot shape in the direction of the liquid inlet 3-1-1, or it can be turned into an umbrella shape in the direction of the liquid outlet 3-3-2 to facilitate sealing and exhaust; Its material is preferably made of absorbent silica gel pad material, which has excellent sealing effect, realizes automatic liquid stop, and is used to supplement the liquid stop function; the liquid stop column core 3- The diameter of 4-2-3 is suitable for the size and diameter of the liquid outlet 3-3-2, and is used to block the liquid outlet 3-3-2, the liquid stop core 3-4-2-3 and the sealing diaphragm The combination of 3-4-2-2 realizes the plugging of the outlet liquid, so as to achieve the effect of double stop liquid.

The sealing diaphragm 3-4-2-2 of the present invention refers to: the film surface in the middle of the double-folded convex liquid sealing part 3-4-2, which has an excellent sealing effect and realizes automatic liquid stop. It is used to supplement the liquid-stopping effect; its design position is shown in the mark 3-4-2-2 in the accompanying drawings 9, 10A, and 10B.

The liquid-stopping column core 3-4-2-3 of the present invention refers to: the lower part of the double-folded convex liquid-sealing part 3-4-2, and its function is to adapt and cooperate with the liquid outlet 3-3-2 , used to block the liquid outlet 3-3-2, the combination of the liquid stop column core 3-4-2-3 and the sealing diaphragm 3-4-2-2 realizes the liquid blockage and achieves the effect of double stop liquid; The design position is shown as 3-4-2-3 in accompanying drawings 10A and 10B.

Example 5:

In order to realize the function of ensuring that the medicinal liquid normally passes through the floating body 3-4-1 during the infusion process, the present invention is provided with a liquid passage tank 3-4-1-1 and a flow surface 3-4-1-2; 1. There are 2-8 liquid-passing tanks 3-4-1-1 on the periphery of the upper part; each liquid-passing tank 3-4-1-1 is provided with a flow-through surface 3-4-1-2 at the lower end; The liquid passes through the overflow surface to the bottom surface of the lower support 3-3 of the drip funnel, and then recoils back to form a recoil force to make the buoyancy liquid stop device 3-4 float up, so as to prevent the infusion situation from being unable to recover due to too tight plugging when changing the bottle; The liquid tank 3-4-1-1 can be in different shapes such as U-shaped, I-shaped, and straight, and the flow surface 3-4-1-2 can be in different shapes such as arcs and squares; because the liquid flow tank 3- The changes of different shapes of 4-1-1 and flow surface 3-4-1-2 make the floating body 3-4-1 have other different shapes accordingly.

The liquid-passing tank 3-4-1-1 of the present invention refers to: it is arranged on the edge around the upper part of the floating body 3-4-1; its function is to ensure the normal passage of the medicinal liquid during the infusion process; its design position is as shown in Figure 5, Mark 3-4-1-1 in 6A, 6B, 7, and 8.

The flow surface 3-4-1-2 of the present invention refers to: it is located at the lower end of the liquid tank 3-4-1-1; its function is when the liquid passes through the flow surface to the bottom surface of the drip funnel 3-3 , and then recoil back to form the recoil force to make the buoyancy liquid stop device 3-4 float up; its design position is shown in the mark 3-4-1-2 in appending 5, 6A, 6B, 7, 8.

Embodiment 6:

In order to realize the function of limiting the position of the buoyancy liquid stop device 3-4 so that it can only float up and down, the present invention is provided with a limiter 3-5; the limiter 3-5 is arranged at the inner lower end of the dropping funnel body 3-3; the floating body 3-4-1 is located between the lower part of the limiting member 3-5 and the upper part of the liquid outlet 3-3-2.

The limiting member 3-5 of the present invention refers to: the limiting frame installed at the lower end of the dropping funnel body 3-3; its function is to limit the position of the buoyancy liquid stop device 3-4, so that it can only float up and down; Its cut-away structure is shown in accompanying drawing 11, and its design position is shown in the mark 3-5 in accompanying drawing 2,3,4,11.

Claims (8)

1. a kind of disposable automatic liquid-stopping transfusion apparatus, including bottle plug puncture unit (1), dropper (2), dropping funnel (3), hose (4), Flow regulator (5), liquid medicine filter (6), connector (7), intravenous infusion needle (8), it is characterized in that dropping funnel (3) is by dropping funnel upper cover (3-1), dropping funnel body (3-2), dropping funnel subiculum (3-3), buoyancy stop liquid device (3-4), locating part (3-5) composition；The bottle stopper is worn Pierce device (1) by dropper (2), dropping funnel (3), hose (4), flow regulator (5), liquid medicine filter (6), connector (7) with it is quiet Arteries and veins transfusion needle (8) connection；The dropping funnel upper cover (3-1) is equipped with inlet (3-1-1), medicine feeding hole (3-1-2), in dropping funnel subiculum (3-3) is equipped with liquid outlet connector (3-3-1), liquid outlet (3-3-2)；The lower part of the locating part (3-5) and liquid outlet (3-3-2) Top between be equipped with buoyancy stop liquid device (3-4)；The buoyancy stops liquid device (3-4) and folds convex by floating body (3-4-1), pairing Sealing liquid component (3-4-2) and connecting component (3-4-3) composition, the floating body (3-4-1) and the pairing fold convex sealing liquid component (3-4-2) is connected by the connecting component (3-4-3)；

The buoyancy stops liquid device (3-4) and folds convex sealing liquid component (3-4-2) equipped with pairing, and pairing folds convex sealing liquid component (3- 4-2) by crown (3-4-2-1), sealing diaphragm (3-4-2-2), only fluid column core (3-4-2-3) form the folded convex shape structure of pairing；

The buoyancy stops floating body (3-4-1) in liquid device (3-4) and was equipped with liquid bath (3-4-1-1), flow-passing surface (3-4-1-2).

2. a kind of disposable automatic liquid-stopping transfusion apparatus according to claim 1, it is characterized in that the buoyancy stops liquid dress The crown (3-4-2-1) for setting (3-4) is so that pairing is folded convex sealing liquid portion for being inserted in connecting component (3-4-3) equipped with inner fovea part Part (3-4-2) can be combined as a whole component with floating body (3-4-1), have the function that fixed floating body (3-4-1) and only liquid.

3. a kind of disposable automatic liquid-stopping transfusion apparatus according to claim 1, it is characterized in that the buoyancy stops liquid dress The crown for setting (3-4) is equipped with solid protrusion, and protrusion folds pairing convex for being inserted into connecting component (3-4-3) inner hole in-core Type sealing liquid component (3-4-2) can be combined as a whole component with floating body (3-4-1), reach fixed floating body (3-4-1) and only liquid Effect.

4. a kind of disposable automatic liquid-stopping transfusion apparatus according to claim 1, it is characterized in that the buoyancy stops liquid dress The edge for setting the sealing diaphragm (3-4-2-2) of (3-4) protrudes and can cover liquid outlet.

5. a kind of disposable automatic liquid-stopping transfusion apparatus according to claim 4, it is characterized in that the buoyancy stops liquid dress The sealing diaphragm (3-4-2-2) for setting (3-4) can translate into pot-shaped on the direction inlet (3-1-1), can also be to liquid outlet (3-3- 2) umbrella shape is translated under direction.

6. a kind of disposable automatic liquid-stopping transfusion apparatus according to claim 1, it is characterized in that the buoyancy stops liquid dress Only fluid column core (3-4-2-3) for setting (3-4) is cylinder, and only fluid column core (3-4-2-3) diameter and liquid outlet (3-3-2) nozzle are big Small-bore adaptable cooperation, for blocking liquid outlet (3-3-2).

7. a kind of disposable automatic liquid-stopping transfusion apparatus according to claim 1, it is characterized in that being set on floating body (3-4-1) Cross liquid bath (3-4-1-1) and flow-passing surface (3-4-1-2)；The top edge floating body (3-4-1) sets the not equal liquid bath excessively of 2-8 item (3-4-1-1)；It crosses the liquid bath lower end (3-4-1-1) for every and is equipped with a flow-passing surface (3-4-1-2), liquid passes through flow-passing surface (3-4-1- 2) bottom surface dropping funnel subiculum (3-3) is arrived, the formation recoil strength back that then recoils makes buoyancy stop liquid device (3-4) convenient for floating.

8. a kind of disposable automatic liquid-stopping transfusion apparatus according to claim 1, it is characterized in that dropping funnel body (3-2) is internal Lower end sets a locating part (3-5)；The locating part (3-5) limits the position that buoyancy stops liquid device (3-4), make its can only on float downward It is dynamic.