CN216439751U

CN216439751U - High-pressure syringe

Info

Publication number: CN216439751U
Application number: CN202122256165.3U
Authority: CN
Inventors: 张铁军; 陈晓英; 曾勇; 石佳; 杨林
Original assignee: Tianjin Haohao Medical Technology Co ltd
Current assignee: Tianjin Haohao Medical Technology Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-05-06
Anticipated expiration: 2031-09-17

Abstract

The utility model relates to a high-pressure injector which comprises an injection cylinder, a piston, a push rod, a protective sleeve and a filter assembly. According to the high-pressure injector, the problem of pollution caused by repeated use of the high-pressure injector is solved through the arrangement of the protective sleeve and the filter assembly, and the repeated use of the high-pressure injector is realized; the high-pressure injector can realize the suction of the medicament and the injection of the medicament without replacing the radiography conduit, and has simple operation, time saving and labor saving; the high-pressure injector can realize injection of different patients only by replacing the medicine outlet pipeline without replacing the whole high-pressure injector, so that the time and labor are saved, the high-pressure injector is economical and environment-friendly, and the waste of medicines is reduced; the high-pressure injector in the application has the advantages of simple structure and strong practicability.

Description

High-pressure syringe

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a high-pressure injector.

Background

Currently, clinically, contrast enhanced scanning is one of the important technical means in CT diagnosis today, and contrast is generally injected into a human body by a high-pressure syringe.

The existing high-pressure injector comprises a needle cylinder, a piston and a push rod, the existing needle cylinder and the like are generally small in volume and disposable, and the needle cylinder needs to be replaced every time a patient is injected, so that the problems of long waiting time of the patient, large workload of medical staff and the like are caused.

Disclosure of Invention

It is an object of the present invention to provide a high pressure syringe that can be reused.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the application provides a high-pressure injector, which comprises an injection cylinder, a piston, a push rod and a protective sleeve,

the piston is arranged in the injection cylinder, the outer side wall of the piston is attached to the inner side wall of the injection cylinder,

one end of the push rod is connected with the piston so that the piston can move on the inner side wall of the injection cylinder under the action force of the push rod,

the protective sleeve can stretch out and draw back, the stretching direction of the protective sleeve is consistent with the axial direction of the injection tube, the protective sleeve is sleeved on the periphery side of the push rod, one end of the protective sleeve is connected with the injection tube, the other end of the protective sleeve is connected with the other end of the push rod,

an isolation area is formed among the protective sleeve, the push rod and the injection tube, a through hole communicated with the external environment is formed in the isolation area, and a filtering assembly used for filtering is arranged on the through hole.

When the high-pressure injector is repeatedly used, the push rod is polluted due to long-term exposure in the air, so that when a patient is injected with a medicament, the polluted push rod enters the injection tube and brings pollutants into the injection tube, the possibility of polluting liquid medicament exists, and the medicament safety is influenced. The combined design of protective sheath and filter assembly has been solved high pressure syringe and has been used for a long time and the pollution problem that exists, has realized high pressure syringe's used repeatedly. In addition, high pressure syringe in this application can realize the gas exchange of isolation region and external environment, can avoid external environment again to the pollution of push rod and the pollution of volatilizing of medicament to external environment, has simple structure, easily advantage of operation.

Preferably, the filter assembly comprises a filter membrane disposed within the through-hole.

According to some preferred embodiments, one end of the push rod, which is far away from the piston, is further provided with a convex part, the through hole is formed in the convex part, and the convex part is connected with the other end of the protective sleeve.

Further preferably, the through hole comprises an air inlet hole and an air outlet hole, the filtering component comprises a first filtering membrane, a second filtering membrane, a first one-way vent valve and a second one-way vent valve, the first filtering membrane is arranged in the air inlet hole, the first one-way vent valve is arranged in the air inlet hole so that air can only flow from the external environment to the direction of the isolation region, the second filtering membrane is arranged in the air outlet hole, and the second one-way vent valve is arranged in the air outlet hole so that air can only flow from the isolation region to the direction of the external environment.

Preferably, the protective sleeve comprises a plurality of convex parts and a plurality of concave parts, and the convex parts and the concave parts are sequentially arranged along the axial direction of the protective sleeve and are distributed at intervals one by one so that the protective sleeve can be stretched.

Preferably, the injection end of the injection cylinder is provided with at least one connecting pipe, and the connecting pipe is communicated with the injection cylinder and is integrally formed with the injection cylinder.

According to some preferred embodiments, the number of the connecting pipes is two, wherein one connecting pipe is connected with the medicine inlet pipeline, and the other connecting pipe is connected with the medicine outlet pipeline.

Preferably, the drug inlet conduit is provided with a first one-way valve to enable the drug to flow only from the drug inlet of the drug inlet conduit to the direction of the syringe, and the drug outlet conduit is provided with a second one-way valve to enable the drug to flow only from the syringe to the direction of the drug outlet conduit.

According to other preferred embodiments, the adapter includes an adapter body connected to the syringe, and a plurality of branch pipes provided on the adapter body and communicating with the adapter body, and the adapter body and the branch pipes are integrally formed.

Further preferably, one of the branch pipes is connected with the medicine inlet pipe, the rest branch pipes are connected with the medicine outlet pipe, and the rest branch pipes correspond to the medicine outlet pipes one to one.

Further preferably, the medicine inlet pipe is provided with a first one-way valve so that the medicine can only flow from the medicine inlet of the medicine inlet pipe to the direction of the injection cylinder, and the medicine outlet pipe is provided with a second one-way valve so that the medicine can only flow from the injection cylinder to the direction of the medicine outlet pipe.

Preferably, the medicine outlet pipeline is further connected with a vacuum pipe, and the inner diameter of the vacuum pipe is larger than that of the medicine outlet pipeline.

Further preferably, the medicine outlet pipeline is further provided with a third one-way valve which only enables the medicine to flow from the injection cylinder to the direction of the medicine outlet pipeline, and the second one-way valve and the third one-way valve are respectively arranged at two ends of the vacuum pipe.

Preferably, the volume of the syringe is 400-600 ml.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the high-pressure injector has the advantages that the problem of pollution caused by repeated use of the high-pressure injector is solved through the combined arrangement of the protective sleeve and the filtering assembly, the repeated use of the high-pressure injector is realized, the gas exchange between the isolation area and the external environment is realized through the arrangement of the filtering assembly, on one hand, the contact between bacteria and dust in the air and the push rod is effectively blocked, the possibility that the push rod enters the injection cylinder to pollute the injection cylinder is eliminated, and on the other hand, the pollution to the external environment caused by the outward volatilization of the medicament on the inner wall of the injection cylinder is effectively prevented;

the high-pressure injector can realize the suction of the medicament and the injection of the medicament without replacing the radiography conduit through the arrangement of the connecting pipe, and has simple operation, time saving and labor saving;

the high-pressure injector can realize injection of different patients only by replacing the medicine outlet pipeline without replacing the whole high-pressure injector, so that the time and labor are saved, the high-pressure injector is economical and environment-friendly, and the waste of medicines is reduced;

the high-pressure injector in the application has the advantages of simple structure and strong practicability.

Drawings

FIG. 1 is a schematic view showing the construction of a high-pressure syringe according to embodiment 1 of the present invention;

FIG. 2 is a partial cross-sectional view of the high pressure syringe of FIG. 1;

FIG. 3 is a left side view of the high pressure syringe of FIG. 1;

FIG. 4 is a schematic view showing the construction of a high-pressure syringe in example 2 of the present invention;

in the above drawings: 1. an injection tube; 2. a piston; 3. a push rod; 31. a convex portion; 4. a protective sleeve; 5. taking over a pipe; 6. a medicine inlet pipeline; 7. a medicine outlet pipeline; 71. a vacuum tube; 72. a second check valve; 73. a third check valve; 8. a through hole; 9. a filter assembly.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; the connection can be mechanical connection, electrical connection or communication; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the utility model. To simplify the disclosure of embodiments of the utility model, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the utility model. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

A high-pressure injector comprises an injection cylinder 1, a piston 2, a push rod 3, a protective sleeve 4 and a filter assembly 9.

A syringe 1 having a receiving chamber capable of receiving a medicament. Preferably, the containment chamber is cylindrical, such as a cylinder, a square column, a prism, or the like. Preferably, the syringe 1 is a large-capacity syringe 1, and the large-capacity syringe 1 eliminates the step of sucking a large number of medicaments when the small-capacity syringe 1 injects the medicaments, and can suck a large amount of medicaments at one time to meet different injection requirements. Further, the volume of the syringe 1 is 400 to 600 ml. The injection end of the injection tube 1 is provided with at least one connecting tube 5, and the connecting tube 5 is communicated with the injection tube 1 and is integrally formed with the injection tube 1. The number and shape of the connecting pipes 5 can be designed according to actual requirements.

The piston 2 is preferably a rubber piston and is disposed in the syringe 1, the outer side wall of the piston 2 is attached to the inner side wall of the syringe 1, and the piston 2 is slidably connected to the syringe 1.

The push rod 3 has a certain length, and the outer diameter of the push rod 3 is smaller than the inner diameter of the syringe 1 so that the push rod 3 can move in the syringe 1. One end of the push rod 3 is connected with the piston 2, so that the piston 2 can move on the inner side wall of the injection tube 1 under the action of the push rod 3, and the connection mode of the push rod 3 and the piston 2 includes but is not limited to clamping, threaded connection, sleeving and the like. The other end of the push rod 3 is provided with a convex part 31, and the outer diameter of the convex part 31 is larger than that of the push rod 3.

The protective sleeve 4 comprises a plurality of convex parts and a plurality of concave parts, and the convex parts and the concave parts are sequentially arranged along the axial direction of the protective sleeve and are distributed at intervals one by one so that the protective sleeve can stretch out and draw back. . The number of the concave parts and the convex parts can be selected according to the length of the push rod 3, the length of the push rod 3 is short, and the number of the concave parts and the convex parts can be properly reduced to be suitable for the push rod 3; the length of the push rod 3 is long, and the number of the concave portions and the convex portions can be increased appropriately to be adapted to the push rod 3. The protective sheath 4 cover is established on the periphery side of push rod 3 and the flexible direction of protective sheath 4 is unanimous with the axial of injection tube 1, and the one end of protective sheath 4 is connected with injection tube 1, and the other end is connected with the one end that the piston 2 was kept away from to push rod 3. Preferably, one end of the sheath 4 is connected to the end of the syringe 1 remote from the injection end, and the other end of the sheath 4 is connected to the projection 31. The push rod 3 is separated from the external environment through the arrangement of the protective sleeve 4, so that the pollution of the external environment to the push rod 3 is avoided.

Form the isolation region between protective sheath 4, injection tube 1, the push rod 3, be equipped with through-hole 8 on the isolation region, filter assembly 9 sets up in through-hole 8 for filter the internal environment of external environment and/or isolation region. The arrangement of the through holes 8 realizes the gas exchange between the isolation area and the external environment, and the arrangement of the filter assembly 9 enables the air to enter the isolation area after being filtered, so that bacteria, viruses, ash layers and the like in the air entering the isolation area can be removed, and the pollution of the air entering the isolation area is further avoided; on the other hand makes the gas in the isolation region filter earlier then discharge to the external environment in, avoided the remaining volatilizing of the medicament on the 1 inner wall of injection tube and to the pollution of external environment, the security is high.

Preferably, the through hole 8 comprises an air inlet hole and an air outlet hole, and the filtering component 9 comprises a first filtering membrane, a second filtering membrane, a first one-way vent valve and a second one-way vent valve. First filtration membrane sets up in the inlet port, and first one-way breather valve sets up in the inlet port so that gas can only flow to the direction of isolation region by external environment, and second filtration membrane sets up in the outlet port, and the one-way breather valve of second sets up in the outlet port so that gas can only flow to the direction of external environment by the isolation region.

The filtering membrane and the one-way vent valve in the application are all commercially available parts.

The utility model will be further described with reference to examples of embodiments shown in the drawings to which the utility model is attached.

Example 1

A high-pressure injector comprises an injection tube 1, a piston 2, a push rod 3, a protective sleeve 4, a connecting tube 5, a medicine inlet pipeline 6, a medicine outlet pipeline 7 and a filter assembly 9.

Injection cylinder 1 is cylindrical structure and has the accommodation chamber, and piston 2 sets up in injection cylinder 1 and laminates with the inside wall of injection cylinder 1, and piston 2 is connected with the one end of push rod 3, and piston 2 can move in injection cylinder 1 under the effort of push rod 3, and then realizes the suction of liquid medicine in order to inject. The other end of push rod 3 is equipped with convex part 31, and protective sheath 4 cover is established on push rod 3, and the one end of protective sheath 4 is connected with the one end that injection end was kept away from to injection tube 1, and the other end is connected with the convex part 31 of push rod 3.

An isolation area is formed among the protective sleeve 4, the push rod 3 and the injection tube 1, and an air inlet and an air outlet which are communicated with the isolation area are respectively arranged on the convex part 31. The filtering assembly 9 comprises a first filtering membrane, a second filtering membrane, a first one-way vent valve and a second one-way vent valve. First filtration membrane sets up in the inlet port, and first one-way breather valve sets up in the inlet port so that gas can only flow to the direction of isolation region by external environment, and second filtration membrane sets up in the outlet port, and the one-way breather valve of second sets up in the outlet port so that gas can only flow to the direction of external environment by the isolation region.

The injection end of the injection tube 1 is provided with two connecting tubes 5, and the connecting tubes 5 are communicated with the injection tube 1 and are integrally formed with the injection tube 1. Through the setting of two takeover 5, need not to change the radiography pipe and can realize the absorption of medicament and the injection of medicament, easy operation, labour saving and time saving.

One of the connection pipes 5 of the syringe 1 is connected to a drug inlet pipe 6, and the other connection pipe 5 is detachably connected to a drug outlet pipe 7. Through the detachable connection of the connecting pipe 5 and the medicine outlet pipeline 7, the medicine outlet pipeline 7 can be replaced only as required, the whole high-pressure injector does not need to be replaced, the injection of different patients can be realized, the repeated use of the high-pressure injector is realized, and the operations of liquid preparation, air exhaust and the like which are required to be carried out when each patient is injected are also omitted. Certainly, the medicine outlet pipeline 7 can also be fixedly connected with the connecting pipe 5, when the medicine outlet pipeline 7 is fixedly connected with the connecting pipe 5, the medicine outlet end of the medicine outlet pipeline 7 can also be connected with a plurality of ways, the medicine outlet end is respectively connected with the radiography conduit through the plurality of ways, and the radiography conduit is connected with a patient, so that the injection of different patients can be realized only by replacing the radiography conduit.

The drug inlet channel 6 is provided with a first one-way valve (not shown) to allow the drug to flow only from the drug inlet of the drug inlet channel 6 to the direction of the syringe 1, and the drug outlet channel 7 is provided with a second one-way valve 72 and a third one-way valve 73 to allow the drug to flow only from the syringe 1 to the direction of the drug outlet channel 7.

The medicine outlet pipeline 7 is also connected with a vacuum pipe 71, the inner diameter of the vacuum pipe 71 is larger than that of the medicine outlet pipeline 7, and the second check valve 72 and the third check valve 73 are respectively arranged at two ends of the vacuum pipe 71. The vacuum tube 71 is used as a buffer area of the medicament, so that the medicament can be sucked and injected simultaneously, and continuous injection can be realized. Because the vacuum tube 71 has a certain volume, when no medicament is in the injection tube 1, the medicament is remained in the vacuum tube 71, the medicament inlet pipeline 6 can be used for realizing the supplement of the medicament liquid without stopping the injection, and the continuity of the injection is ensured. In addition, the vacuum tube can be heated according to actual conditions during injection so as to meet different injection requirements.

The working principle is as follows:

the medicine inlet pipeline 6 is communicated with the medicine, the push rod 3 is pulled to enable the injection tube 1 to be filled with the medicine, and then the medicine outlet pipeline 7 is communicated with the human body to push the push rod 3 to complete the injection of the medicine. In the meantime, if the medicine needs to be replenished, the medicine inlet pipe 6 is only required to be communicated with the medicine, and the push rod 3 is pulled to suck the medicine.

Example 2

The injection tube 1 is of a cylindrical structure and is provided with an accommodating cavity, the piston 2 is arranged in the injection tube 1 and is attached to the inner side wall of the injection tube 1, the piston 2 is connected with one end of the push rod 3, the piston 2 can move in the injection tube 1 under the acting force of the push rod 3, and then the liquid medicine is sucked for injection. The other end of push rod 3 is equipped with convex part 31, and protective sheath 4 cover is established on push rod 3, and the one end of protective sheath 4 is connected with the one end that injection end was kept away from to injection tube 1, and the other end is connected with the convex part 31 of push rod 3.

The injection end of the injection tube 1 is provided with a connecting tube 5, and the connecting tube 5 is communicated with the injection tube 1 and is integrally formed with the injection tube 1.

The adapter 5 comprises an adapter body and a plurality of branch pipes. The connecting pipe main body is connected with the injection tube 1, the branch pipes are arranged on the connecting pipe main body and are communicated with the connecting pipe main body, and the connecting pipe main body and the plurality of branch pipes are integrally formed. One branch pipe is connected with the medicine inlet pipeline 6, the rest branch pipes are detachably connected with the medicine outlet pipeline 7, and the rest branch pipes correspond to the medicine outlet pipelines 7 one to one. The number of the branch pipes is not limited, and may be one, two, three, four, five, six, etc., and the number of the branch pipes in this embodiment is two. This application can realize only needing once to join in marriage the injection that liquid can realize a plurality of patients through the setting of a plurality of branch pipes, has saved every patient and need carry out the operation of joining in marriage liquid, exhaust etc. respectively when injecting. In addition, through taking over 5 and being connected with dismantling of going out medicine pipeline 7, can go out the change of medicine pipeline 7 to only need to change when carrying out same medicament multiple injection go out medicine pipeline 7 can, and need not change whole high pressure syringe, realized high pressure syringe's used repeatedly. Of course, the medicine outlet end of each medicine outlet pipeline 7 can also be connected with the multi-way and then connected with the radiography conduit through the multi-way, and the reuse of the high-pressure injector is realized by replacing the radiography conduit.

The medicine inlet pipe 6 is provided with a first one-way valve (not shown in the figure) so that the medicine can only flow from the medicine inlet of the medicine pipe to the direction of the injection cylinder 1; the drug outlet channel 7 is provided with a second one-way valve 72 and a third valve so that the drug can only flow from the syringe 1 to the drug outlet of the drug outlet channel 7.

The medicine outlet pipe 7 is also connected with a vacuum pipe 71, the inner diameter of the vacuum pipe 71 is larger than that of the medicine outlet pipe 7, and the second check valve 72 and the third check valve 73 are respectively arranged at two ends of the vacuum pipe 71. The vacuum tube 71 is used as a buffer area of the medicament, so that the medicament can be sucked and injected simultaneously, and continuous injection can be realized. Because the vacuum tube 71 has a certain volume, when no medicament is in the injection tube 1, the medicament is remained in the vacuum tube 71, the medicament inlet pipeline 6 can be used for realizing the supplement of the medicament liquid without stopping the injection, and the continuity of the injection is ensured. In addition, the vacuum tube can be heated according to actual conditions during injection so as to meet different injection requirements.

The working principle is as follows:

the medicine inlet pipeline 6 is communicated with the medicine, the push rod 3 is pulled to enable the injection tube 1 to be filled with the medicine, one medicine outlet pipeline 7 is communicated with a patient, the push rod 3 is pushed to inject the medicine, after the injection is finished, the other medicine outlet pipeline 7 is communicated with the other patient to finish the medicine injection, and after the injection is finished, the medicine outlet pipeline 7 which is not injected is communicated with the patient again, so that the reciprocating operation can be realized, and the repeated use of the same high-pressure injector can be realized. In the meantime, if the medicine needs to be replenished, the medicine inlet pipe 6 is only required to be communicated with the medicine, and the push rod 3 is pulled to suck the medicine.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-pressure injector is characterized in that the high-pressure injector comprises an injection cylinder (1), a piston (2), a push rod (3) and a protective sleeve (4),

the piston (2) is arranged in the injection cylinder (1), the outer side wall of the piston (2) is attached to the inner side wall of the injection cylinder (1),

one end of the push rod (3) is connected with the piston (2) so that the piston (2) can move on the inner side wall of the injection cylinder (1) under the action force of the push rod (3),

the protective sleeve (4) can stretch out and draw back, the stretching direction of the protective sleeve (4) is consistent with the axial direction of the injection tube (1), the protective sleeve (4) is sleeved on the periphery of the push rod (3), one end of the protective sleeve (4) is connected with the injection tube (1) and the other end is connected with the other end of the push rod (3),

an isolation area is formed among the protective sleeve (4), the push rod (3) and the injection tube (1), a through hole (8) communicated with the external environment is formed in the isolation area, and a filtering assembly (9) used for filtering is arranged on the through hole (8).

2. High pressure syringe according to claim 1, characterized in that the filter assembly (9) comprises a filter membrane arranged in the through hole (8).

3. The high-pressure injector according to claim 1, characterized in that the end of the push rod (3) away from the piston (2) is further provided with a convex part (31), the through hole (8) is arranged on the convex part (31), and the convex part (31) is connected with the other end of the protective sleeve (4); the through hole (8) comprises an air inlet hole and an air outlet hole, the filtering component (9) comprises a first filtering membrane, a second filtering membrane, a first one-way vent valve and a second one-way vent valve, the first filtering membrane is arranged in the air inlet hole, the first one-way vent valve is arranged in the air inlet hole so that air can only flow from the external environment to the direction of the isolation area, the second filtering membrane is arranged in the air outlet hole, and the second one-way vent valve is arranged in the air outlet hole so that air can only flow from the isolation area to the direction of the external environment.

4. High-pressure syringe according to claim 1, characterized in that the protective sheath (4) comprises a plurality of protrusions and a plurality of recesses, which are arranged one after the other in the axial direction of the protective sheath and are spaced one from the other to enable the sheath (4) to be retracted.

5. High-pressure syringe according to claim 1, characterized in that the injection end of the syringe (1) is provided with at least one adapter tube (5), the adapter tube (5) communicating with the syringe (1) and being integrally formed with the syringe (1).

6. High-pressure syringe as claimed in claim 5, characterized in that the number of connecting pieces (5) is two, wherein one connecting piece (5) is connected to the inlet line (6) and the other connecting piece (5) is connected to the outlet line (7),

the medicine inlet pipeline (6) is provided with a first one-way valve so that the medicine can only flow from the medicine inlet of the medicine inlet pipeline (6) to the direction of the injection cylinder (1), and the medicine outlet pipeline (7) is provided with a second one-way valve (72) so that the medicine can only flow from the injection cylinder (1) to the direction of the medicine outlet pipeline (7).

7. The high pressure syringe according to claim 5, wherein the adapter (5) comprises an adapter body connected to the syringe (1), a plurality of branch pipes provided on and communicating with the adapter body, the adapter body being integrally formed with the branch pipes; one branch pipe is connected with a medicine inlet pipeline (6), and a first one-way valve is arranged on the medicine inlet pipeline (6) so that the medicine can only flow from a medicine inlet of the medicine inlet pipeline (6) to the direction of the injection cylinder (1); the rest branch pipes are connected with the medicine outlet pipelines (7) and correspond to the medicine outlet pipelines (7) one by one, and second one-way valves (72) are arranged on the medicine outlet pipelines (7) so that the medicine can only flow from the injection cylinder (1) to the direction of the medicine outlet pipelines (7).

8. The high-pressure syringe as claimed in claim 6 or 7, wherein a vacuum tube (71) is further connected to the medicine outlet tube (7), and the inner diameter of the vacuum tube (71) is larger than that of the medicine outlet tube (7).

9. The high pressure syringe according to claim 8, wherein the drug outlet conduit (7) is further provided with a third one-way valve (73) which only enables the drug to flow from the syringe (1) to the direction of the drug outlet conduit (7), and the second one-way valve (72) and the third one-way valve (73) are respectively located at two ends of the vacuum tube (71).

10. High pressure syringe according to one of claims 1, 5 and 7, characterized in that the volume of the syringe barrel (1) is 400 to 600 ml.