CN104857588B

CN104857588B - Safety bag type infusion apparatus

Info

Publication number: CN104857588B
Application number: CN201510296827.6A
Authority: CN
Inventors: 李飞
Original assignee: Sichuan Nigale Biomedical Inc
Current assignee: Sichuan Nigale Biomedical Inc
Priority date: 2015-06-03
Filing date: 2015-06-03
Publication date: 2020-03-17
Anticipated expiration: 2035-06-03
Also published as: CN104857588A

Abstract

The invention provides a safe bag type infusion apparatus which comprises a dropping funnel (10) and a puncture outfit (4), wherein the top end of the puncture outfit (4) is provided with a puncture head, the tail end of the puncture outfit (4) is fixedly connected with a liquid separation bag (1) in a sealing way through a first connecting hose (2), the first connecting hose (2) is provided with a flow regulating device, a partition plate (103) is fixedly connected in the inner cavity of the dropping funnel (10), the inner cavity of the dropping funnel (10) is divided into a filter cavity (102) and a collection cavity (106) by the partition plate (103), a conduit (104) is fixedly arranged on the partition plate (103), the filter cavity (102) is communicated with the collection cavity (106) by the conduit (104), and a filter screen (11) is fixedly arranged in the filter cavity (102). The invention can force the impurities deposited on the filter screen to be separated from the filter screen by properly extruding the filter cavity on the dropping funnel, so that the output flow in the pipeline is recovered to be normal; meanwhile, impurities cannot forcibly pass through the filter screen and are finally output to a human body, and the reliability and the safety are high.

Description

Safety bag type infusion apparatus

Technical Field

The invention relates to a bag type infusion apparatus, in particular to a safe bag type infusion apparatus.

Background

The disposable common bag type infusion apparatus in the medical industry is widely applied to clinical infusion, and has the most extensive application and the highest use frequency. The common bag type infusion apparatus is mainly composed of a puncture outfit, an exhaust branch with an air filter, a liquid separating bag, a flow regulator, a liquid medicine filter, a dropping funnel and an infusion needle which are connected with the puncture outfit in sequence. Wherein the exhaust branch is a medical connecting hose, and two ends of the exhaust branch are respectively communicated with the air filter and the puncture outfit. In the infusion process, need utilize the puncture ware to alternate the infusion bottle to the exhaust branch who takes air cleaner is fixed up, consequently, the exhaust branch who takes air cleaner takes place occasionally forgets to fix again, perhaps fixes badly, thereby the pipeline condition of leaking or air cleaner appears and is rolled over, has influenced normal infusion, has reduced infusion efficiency, causes the pollution even. The puncture outfit connected with the exhaust branch with the air filter has no handle position, so the labor intensity of puncture operation during transfusion is increased.

In addition, the common bag type infusion apparatus is basically made of polyvinyl chloride (PVC) materials, and the PVC plastics are hard and are not suitable for being used as infusion apparatus components such as catheters, drip chambers and the like, so a large amount of plasticizer and other auxiliary agents are required to be added into the PVC plastics, and the PVC plastics are soft and elastic. However, when the drip chamber, catheter and the like in the bag type infusion set made of the modified PVC plastic are in direct contact with the liquid medicine, plasticizers, stabilizers and the like in the PVC plastic can seep out to pollute the liquid medicine and generate chemical reaction with the liquid medicine to generate harmful substances, so that the physical health and the treatment effect of a patient are damaged to a certain extent. The common bag-type infusion apparatus made of waste polyvinyl chloride materials is difficult to burn, the soil can be seriously polluted when the common bag-type infusion apparatus is buried, hydrogen chloride and dioxin gas can be generated in the burning process, acid rain can be formed by the hydrogen chloride, and the dioxin gas is a carcinogenic substance, so that the common bag-type infusion apparatus is poor in environmental protection.

Finally, although the filter screen is installed in the dropping funnel of the common bag-type infusion apparatus, the filter screen is installed in the inner cavity of the dropping funnel, the filter screen and the dropping funnel share the same inner space, the infusion fluid is filtered by the filter screen and then flows out of the dropping funnel, and the flowing infusion fluid has a certain compression effect on the filter screen. Therefore, when large-particle-size impurities in the infusion fluid enter the inner space of the dropping funnel, the impurities are easily deposited on the filter screen, so that the filter screen is easily blocked. If the dropping funnel is forcibly extruded, impurities are easily extruded out of the filter screen and finally enter the human body along with flowing infusion fluid, and the infusion safety is adversely affected, so that certain safety risk exists.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the problems in the prior art, the safe bag type infusion set is provided, and the reliability and the safety of infusion are improved.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: the utility model provides a safe type bag type transfusion system, includes drip chamber, puncture ware, the puncture ware top is the puncture head, and puncture ware tail end and divide and set up flow regulator on first coupling hose through the sealed fixed connection of first coupling hose between the liquid bag, fixed connection baffle in the drip chamber inner chamber, mutually independent filter chamber and collection chamber are separated into with the drip chamber inner chamber to the baffle, fixed mounting pipe on the baffle, the pipe switches on filter chamber and collection chamber fixed mounting filter screen in the filter chamber.

Preferably, the filter screen is funnel-shaped, a relatively larger end of the filter screen is an inlet end, an opening direction of the inlet end is back to the partition plate, a relatively smaller end of the filter screen is an outlet end, and the outlet end is close to the partition plate.

Preferably, the clapboard and the catheter are tightly adhered into a whole by medical polymer adhesive or integrally connected.

Preferably, the second puncture outfit is provided with an air inlet channel penetrating through the puncture head, the air inlet end of the air inlet channel is fixedly provided with a one-way air inlet membrane through a fixing support with a through hole, the through hole in the fixing support is communicated with the air inlet channel, the fixing support is hermetically connected with the fixing cover so as to close the air inlet part of the fixing support, and the fixing support is separated from the fixing cover so as to open the air inlet part of the fixing support.

Preferably, the cross section of the fixing cover is in a T shape, and the bulge part of the fixing cover is in interference fit with the through hole in the fixing support.

Preferably, the flow regulator is a first roller type flow regulator.

Preferably, the flow regulating device is an elastic ball, a through hole is arranged on the elastic ball, and the first connecting hose penetrates through the through hole.

Preferably, the first connecting hose is provided with a liquid stopping clip.

Preferably, the flow regulating device is an elastic ball, a through hole is formed in the elastic ball, a corrugated pipe is arranged on the first connecting hose, and the elastic ball is mounted in the inner cavity of the corrugated pipe.

Preferably, the liquid-separating bag and/or the first connecting hose and/or the dropping funnel are processed and formed by thermoplastic elastomer.

Compared with the prior art, the invention has the beneficial effects that: when the filter screen in the dropping funnel is blocked due to excessive large-particle-size impurities which cannot pass through the filter screen, an operator can properly extrude the filter cavity on the dropping funnel to enable the impurities deposited on the filter screen to move in the direction opposite to the normal flowing direction of liquid, so that the impurities are forced to be separated from the filter screen, the filtering capacity of the filter screen is recovered, and the output flow of the dropping funnel is recovered to be normal; meanwhile, the impurities deposited on the filter screen cannot forcibly pass through the filter screen and enter the collecting cavity, so that the impurities cannot be output to a human body, and the reliability and the safety of infusion are ensured.

Drawings

Fig. 1 is a structural diagram of a safety bag type infusion set (embodiment 1) of the invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view of a portion B in fig. 2.

Fig. 4 is a cross-sectional view (exploded view) of the puncture instrument of fig. 1.

Fig. 5 is a structural diagram of a safety bag type infusion set (embodiment 2) of the invention.

Fig. 6 is a cross-sectional view of the elastic ball of fig. 5.

Fig. 7 is a structural diagram of a safety bag type infusion set (embodiment 3) of the invention.

Fig. 8 is a block diagram of the drip chamber of fig. 1, 5 or 7.

The labels in the figure are: 1-a liquid separating bag, 2-a first connecting hose, 3-a first roller type flow regulator, 4-a puncture outfit, 5-a second connecting hose, 6-a second roller type flow regulator, 7-a third connecting hose, 8-a liquid medicine filter, 9-an infusion needle, 10-a dropping funnel, 11-a filter screen, 12-an elastic ball, 13-a liquid stopping clip, 14-a through hole, 15-a corrugated pipe, 41-a holding part, 42-an air inlet channel, 43-a main channel, 44-a puncture head, 45-a fixing bracket, 46-a fixing cover, 47-a puncture outfit body, 48-a one-way air inlet membrane, 49-an air filtering membrane, 101-an input pipe, 102-a filtering cavity, 103-a partition board, 104-a conduit and 105-an output pipe, 106-collection chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

The safe bag type infusion apparatus shown in fig. 1 is a closed pipeline system formed by fixedly connecting a puncture outfit 4, a first connecting hose 2, a liquid separating bag 1, a second connecting hose 5, a dropping funnel 10, a third connecting hose 7, a liquid medicine filter 8 and an infusion needle 9 in sequence. The puncture outfit 4 has a specific structure as shown in fig. 2, 3 and 4, and comprises a puncture outfit body 47, a holding part 41, a fixing bracket 45 with a through hole and a fixing cover 46, wherein the puncture head 44 is arranged at the free end of the puncture outfit body 47, the holding part 41 is in a trapezoidal shape, and the relatively larger end of the holding part is fixedly connected with the puncture outfit body 47, so that an operator can apply sufficient acting force to the puncture head 44 through the holding part 41, the puncture efficiency of the puncture outfit 4 is improved, and the labor intensity during puncture operation is reduced.

The puncture outfit body 47 is provided with a main flow passage 43, and the puncture outfit body 47 is provided with an air inlet passage 42 penetrating through the puncture head 44, wherein the air inlet passage 42 is parallel to the main flow passage 43. The inlet end of the air inlet channel 42 is provided with a groove, the fixing support 45 is in a T shape, the relatively smaller end of the fixing support is fixedly and hermetically connected in the groove in an interference fit mode, the fixing support can also be fixedly and hermetically connected in the groove by adopting medical high polymer adhesive, the relatively larger end of the fixing support is exposed out of the puncture outfit body 47, and the through hole on the fixing support 45 is communicated with the air inlet channel 42. A one-way air inlet film 48 and an air filtering film 49 are arranged between the fixing bracket 45 and the puncture outfit body 47, the one-way air inlet film 48 is fixedly arranged at the air inlet end of the air inlet channel 42 through the fixing bracket 45, and the air filtering film 49 is arranged between the one-way air inlet film 48 and the fixing bracket 45, as shown in fig. 4.

The cross-sectional shape of the fixing cover 46 is T-shaped, the main body of the relatively smaller end of the fixing cover is cylindrical, and the top end of the boss is designed into a spherical body, so that the fixing cover 46 can be guided when being buckled with the fixing bracket 45, and the fixing cover 46 can be conveniently taken down from the fixing bracket 45. The convex part on the fixed cover 46 is preferably in interference fit with the through hole on the fixed bracket 45, when the fixed cover 46 is buckled with the fixed bracket 45 in place, the fixed cover 46 is hermetically connected with the fixed bracket 45 so as to close the air inlet part of the fixed bracket 45; when the fixing cover 46 and the fixing bracket 45 are separated from each other, the air inlet portion of the fixing bracket 45 is opened, so that the air inlet passage 42 and the space outside the puncture instrument 4 communicate with each other, so that the air in the space outside the puncture instrument 4 can enter the air inlet passage 42 from the through hole in the fixing bracket 45 and flow out of the puncture instrument 4 from the puncture head 44. The puncture instrument 4 is a puncture instrument with a unidirectional air intake mechanism because the unidirectional air intake membrane 48 allows only air from the space outside the puncture instrument 4 to pass through the unidirectional air intake membrane 48 and enter the air intake passage 42 after the fixing cover 46 is opened.

The two ends of the first connecting hose 2 are respectively fixedly connected with the puncture outfit 4 and the liquid separating bag 1 in a sealing way by adopting medical high polymer adhesive, the main flow passage 43 on the puncture outfit 4 is communicated with the first connecting hose 2, the first roller type flow regulator 3 is arranged on the first connecting hose 2 as a flow regulating device, and the second roller type flow regulator 6 is arranged on the third connecting hose 7 as a flow regulating device. The working principle of the bag-type infusion set of the embodiment is as follows:

when the transfusion is clinically needed, the first roller type flow regulator 3 on the first connecting hose 2 is closed, then the fixing cover 46 on the puncture outfit 4 is opened, the puncture head 44 on the puncture outfit 4 punctures the transfusion bottle, then the first roller type flow regulator 3 and the second roller type flow regulator 6 are opened, the liquid in the transfusion bottle can sequentially flow through the puncture outfit 4, the first connecting hose 2, the liquid separation bag 1, the second connecting hose 5, the dropping funnel 10, the third connecting hose 7 and the liquid medicine filter 8, and finally is output to the human body through the transfusion needle 9, so that the transfusion process is realized. In the infusion process, the liquid flow in the first connecting hose 2 can be conveniently adjusted through the first roller type flow regulator 3, and the liquid flow in the third connecting hose 7 can be conveniently adjusted through the second roller type flow regulator 6, so that the output speed of the infusion needle 9 is controlled, the infusion pain caused by the excessively high infusion speed is relieved, and the safety and the reliability of the infusion are ensured.

In the process of infusion, liquid in the pipeline system may contain granular impurities, and after the liquid enters the inner cavity of the dropping funnel 10, the impurities, especially large-particle-size impurities, are easily deposited on the filter screen 11, so that the filtering capacity of the filter screen 11 is reduced, and even the filter screen 11 is blocked, which causes the reduction of liquid flow in the subsequent pipeline system of the dropping funnel 10. At this time, if the dropping funnel 10 is forcibly squeezed, impurities, particularly small-particle-size impurities, can easily pass through the filter screen 11 and enter a subsequent pipeline system of the dropping funnel 10, and finally enter a human body along with flowing liquid, so that adverse effects are caused on the safety of infusion, and the health of the human body can be affected, even the life is threatened.

In order to ensure the safe and reliable infusion, the structure of the dropping funnel 10 can be designed as shown in fig. 8, one end of the dropping funnel 10 is fixedly connected with an input pipe 101, the other end is fixedly connected with an output pipe 105, a partition plate 103 is fixedly connected in the inner cavity of the dropping funnel 10, and the partition plate 103 divides the inner cavity of the dropping funnel 10 into two inner cavities, namely a filtering cavity 102 and a collecting cavity 106, which are mutually independent; a conduit 104 is fixedly mounted on the partition 103, said conduit 104 communicating the filter chamber 102 with the collection chamber 106. The filter screen 11 can be fixedly installed in the inner cavity of the input end of the dropping funnel 10 in a heat seal mode, that is, the filter screen 11 is fixedly installed in the filter cavity 102, and the filter screen 11 is located between the input pipe 101 and the partition plate 103.

As shown in fig. 8, when liquid enters the drip chamber 10 from the input tube 101, first, the fluid entering the filter chamber 102 is filtered by the filter screen 11, if the fluid contains large-particle-size impurities which cannot pass through the filter screen 11, for example, blood entering the inner cavity of the drip chamber 10 may contain blood clots with large particle size during blood transfusion; in the process of transfusion of protein fluid with high viscosity, protein precipitates with large particle size may also be contained in the protein fluid, and impurities with large particle size which cannot pass through the filter screen 11 will be deposited on the filter screen 11, which easily causes the blockage of the meshes of the filter screen 11, so that the filtering capacity of the filter screen 11 is reduced, the output flow of the drip chamber 10 is reduced, even the subsequent pipeline of the drip chamber 10 is cut off, the transfusion efficiency is seriously affected, and certain safety problems may be brought. Fluid that is able to enter the filter chamber 102 passes through the conduit 104 into the collection chamber 106 and is ultimately output through the output tube 105 to a subsequent line outside the drip chamber 10.

If the amount of impurities deposited on the filter screen 11 is too large, the output flow of the drip chamber 10 will be greatly reduced, even if there is no output, for example, when blood transfusion occurs, blood clots in the blood will be deposited on the filter screen 11, causing the filter screen 11 to be clogged. In this case, an operator can appropriately press the filter cavity 102 on the dropping funnel 10, and after the filter cavity 102 is compressed and contracted, the impurities deposited on the filter screen 11 will move upwards, i.e. the movement direction of the impurities will be opposite to the normal flow direction of the fluid, so that the impurities and the filter screen 11 are forced to separate from each other, the filtering capability of the filter screen 11 is restored, and the output flow of the dropping funnel 10 is restored to normal. After the filter cavity 102 is compressed and contracted, the movement direction of the impurities deposited on the filter screen 11 is opposite to the normal flow direction of the fluid, so the impurities cannot forcibly pass through the filter screen 11 and enter the collection cavity 106, the impurities are ensured not to be output through the output pipe 105, and finally enter the human body along with the flowing liquid, and the reliability and the safety of the transfusion are ensured. The filter screen 11 can be designed into a funnel shape, the relatively larger end of the filter screen is an inlet end, the opening direction of the inlet end is back to the partition plate 103, the relatively smaller end of the filter screen is an outlet end, and the outlet end is close to the partition plate 103, so that the filtering capacity of the filter screen 11 can be increased, the bearing capacity for impurities can be improved, and the reliability and the safety of the dropping funnel 10 are enhanced.

The casing of the dropping funnel 10 is preferably made of TPE materials, so that the dropping funnel 10 has high transparency and extrusion resilience, the number of drops output by the catheter 104 can be clearly observed when infusion is facilitated, the infusion safety is improved, the dropping funnel 10 can be quickly reset after being pressed and deformed, and the inner cavity of the dropping funnel 10 is ensured to have certain infusion pressure. In addition, when the disposal of the drip chamber 10 is required after the use thereof, harmful substances such as hydrogen chloride and dioxin gas are not generated even if the incineration disposal is performed, thereby contributing to environmental protection in the incineration disposal of the drip chamber 10.

The partition plate 103 and the shell of the dropping funnel 10, the input pipe 101 and the input end of the dropping funnel 10, the output pipe 105 and the output end of the dropping funnel 10, and the partition plate 103 and the guide pipe 104 can be tightly bonded into a whole by medical high polymer adhesives, and can also be integrally formed and connected by mould processing, so that the production cost of the dropping funnel 10 is reduced. The input pipe 101, the output pipe 105, the partition plate 103 and the guide pipe 104 are also preferably formed by processing TPE materials, so that the processing and forming are easy, the tight adhesion can be realized easily through medical polymer adhesives, the reliable connection strength is ensured, and harmful substances such as hydrogen chloride, dioxin gas and the like can not be generated in the incineration treatment of the dropping funnel 10, thereby improving the environmental protection level of the bag-type infusion apparatus.

Example 2

As shown in fig. 5 and 6, in the bag-type infusion set, an elastic ball 12 is sleeved on a first connecting hose 2 as a flow rate adjusting device, a through hole 14 is formed in the elastic ball 12, and the first connecting hose 2 penetrates through the through hole 14. In order to further facilitate the direct, quick closing operation of the first connecting hose 2, a liquid stop clamp 13 can be additionally arranged on the first connecting hose 2. As for the flow rate adjusting means on the third connecting hose 7, either an elastic ball 12 can be used in cooperation with the liquid stopper 13 with reference to the first connecting hose 2 or a roller type flow rate adjuster can be used. The other structure is the same as that of embodiment 1.

Compared with the embodiment 1, when the bag-type infusion apparatus of the present embodiment performs an infusion operation, if the fluid flow in the first connection hose 2 or the third connection hose 7 needs to be adjusted, only the elastic ball 12 needs to be squeezed. The elastic ball 12 is pressed to press the first connection hose 2 or the third connection hose 7, so that the flow rate in the first connection hose 2 or the third connection hose 7 is changed, and the purpose of adjusting the flow rate is achieved. The other operations are the same as those in embodiment 1, and are not described herein again. It should be noted that, in order to save labor during the squeezing operation, the elastic ball 12 may be made of medical rubber or medical TPE. The through hole 14 on the elastic ball 12 can be a circular hole or an elliptical hole, and the through hole 14 is more labor-saving than the circular hole in operation due to the elliptical hole.

Example 3

In the bag type infusion set shown in fig. 7, a bellows 15 is connected to the first connection hose 2, an elastic ball 12 is installed in an inner cavity of the bellows 15 as a flow rate adjusting device, and a through hole 14 is formed in the elastic ball 12 to penetrate through the first connection hose 2. In order to further facilitate the direct, quick closing operation of the first connecting hose 2, a liquid stop clamp 13 can be additionally arranged on the first connecting hose 2. As for the flow rate adjusting means on the third connecting hose 7, either an elastic ball 12 can be used in cooperation with the liquid stopper 13 with reference to the first connecting hose 2 or a roller type flow rate adjuster can be used. The other structure is the same as that of embodiment 1.

When the bag-type infusion set in this embodiment is used for infusion operation, if the fluid flow in the first connection hose 2 or the third connection hose 7 needs to be adjusted, only the elastic ball 12 in the bellows 15 needs to be pressed. When the elastic ball 12 is pressed, the through hole 14 on the elastic ball will be reduced, so that the flow in the first connecting hose 2 or the third connecting hose 7 is changed, thereby achieving the purpose of adjusting the flow. The other operations are the same as those in embodiment 2, and are not described herein again. However, compared with embodiment 2, the bellows 15 can increase the flexibility of the first connection hose 2 or the third connection hose 7, effectively prevent the pipe from being broken, and improve the reliability of infusion; moreover, the elastic expansion and contraction of the bellows 15 itself is also advantageous in reducing the crushing wear of the elastic balls 12. The bellows 15 can be formed by selecting TPE materials, so that the bellows 15 can be ensured to have high resilience, and the environmental protection during the waste treatment of the bag type infusion apparatus is facilitated.

In summary, the air inlet channel 42 penetrating the puncture head 44 is arranged on the puncture outfit 4, and the one-way air inlet film 48 is arranged at the inlet of the air inlet channel 42, so that the bag-type infusion apparatus in the above embodiment does not need to be separately provided with an exhaust branch with an air filter, thereby avoiding the occurrence of pipeline breakage or air filter leakage caused by improper operation of the exhaust branch, improving the infusion efficiency, and effectively avoiding pollution in the infusion process, thereby ensuring the safety and reliability of infusion.

In the infusion process, if too much large-particle-size impurities which cannot pass through the filter screen 11 are deposited on the filter screen 11 in the dropping funnel 10 to cause the filter screen 11 to be blocked, an operator can appropriately press the filter cavity 102 on the dropping funnel 10 to enable the impurities deposited on the filter screen 11 to move in the direction opposite to the normal flowing direction of liquid, so that the impurities and the filter screen 11 are forced to be separated from each other, the filtering capacity of the filter screen 11 is recovered, and the output flow of the dropping funnel 10 is recovered to be normal; meanwhile, the impurities deposited on the filter screen 11 cannot forcibly pass through the filter screen 11 and enter the collection cavity 106, so that the impurities cannot be output to a human body, and the reliability and the safety of infusion are effectively ensured.

In the bag-type infusion apparatus, all components in contact with liquid, such as the liquid separation bag 1, the first connecting hose 2, the second connecting hose 5, the dropping funnel 10 and components thereof, and the third connecting hose 7, can be made of thermoplastic elastomer (TPE), which has no adsorption and chemical reaction to infusion drugs, so that the whole pipeline system has high transparency, is convenient for observation during infusion, improves the safety of infusion, and does not generate harmful substances such as hydrogen chloride and dioxin gas even if the bag-type infusion apparatus is incinerated after being used, thereby being more beneficial to environmental protection. Importantly, the bag-type infusion apparatus made of the thermoplastic elastomer can avoid the harm caused by adding the plasticizer (DEHP) in the bag-type infusion apparatus made of polyvinyl chloride (PVC) materials, so that the bag-type infusion apparatus has the advantages of safety and reliability, greatly reduces the harmful substances from entering a human body during infusion, reduces the personal injury caused by the infusion, and ensures the safety and the treatment effect of medication.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a safe type bag infusion set, includes drip chamber (10), puncture ware (4) top is puncture head (44), and through first coupling hose (2) fixed connection that seals between puncture ware (4) tail end and the branch liquid bag (1), set up flow control device, its characterized in that on first coupling hose (2): a partition plate (103) is fixedly connected in the inner cavity of the dropping funnel (10), the partition plate (103) divides the inner cavity of the dropping funnel (10) into a filtering cavity (102) and a collecting cavity (106) which are mutually independent, a guide pipe (104) is fixedly arranged on the partition plate (103), the filtering cavity (102) is communicated with the collecting cavity (106) through the guide pipe (104), and a filter screen (11) is fixedly arranged in the filtering cavity (102); the flow adjusting device is an elastic ball (12), a through hole (14) is formed in the elastic ball (12), a corrugated pipe (15) is arranged on the first connecting hose (2), and the elastic ball (12) is arranged in an inner cavity of the corrugated pipe (15).

2. The safety bag-type infusion set according to claim 1, wherein: the filter screen (11) be hopper-shaped, its great end relatively is the entry end, and the opening direction of entry end is the baffle (103) dorsad, its less end relatively is the exit end, and the exit end is close to baffle (103).

3. The safety bag-type infusion set according to claim 1 or 2, wherein: the clapboard (103) and the catheter (104) are tightly bonded into a whole by medical high polymer adhesive or integrally connected.

4. The safety bag-type infusion set according to claim 1, wherein: the puncture outfit (4) is provided with an air inlet channel (42) penetrating through the puncture head (44), a one-way air inlet film (48) is fixedly installed at the air inlet end of the air inlet channel (42) through a fixing support (45) with a through hole, the through hole in the fixing support (45) is communicated with the air inlet channel (42), the fixing support (45) is hermetically connected with a fixing cover (46) to close the air inlet part of the fixing support (45), and the fixing support (45) is separated from the fixing cover (46) to open the air inlet part of the fixing support (45).

5. The safety bag-type infusion set according to claim 4, wherein: the cross section of the fixing cover (46) is in a T shape, and the protruding part of the fixing cover is in interference fit with the through hole in the fixing support (45).

6. The safety bag-type infusion set according to claim 1, wherein: the first connecting hose (2) is provided with a liquid stopping clamp (13).

7. The safety bag-type infusion set according to claim 1, wherein: the liquid separating bag (1) and/or the first connecting hose (2) and/or the dropping funnel (10) are/is processed and formed by thermoplastic elastomer.