CN112076354A - Closed low-negative-pressure sterile drainage liquid specimen collector - Google Patents

Abstract

The invention relates to a closed type low negative pressure sterile drainage liquid sample collector, which comprises a collecting bottle and a drainage sample input structure, and is characterized in that: the bottle mouth of the collecting bottle is connected with a spiral bottle cap structure, the spiral bottle cap structure comprises a spiral bottle cap, a negative pressure mastoid and a hard tube, the negative pressure mastoid is arranged on the spiral bottle cap, and the inner cavity of the negative pressure mastoid is communicated with the inner cavity of the collecting bottle to form a negative pressure structure; the drainage specimen input structure is provided with a threaded joint, a pipeline upper part and a pipeline lower part, and the top end of the pipeline upper part is connected with the threaded joint; the lower part of the pipeline extends into the inner cavity of the collecting bottle, and a liquid backflow preventing structure is arranged at the pipe orifice at the tail end of the lower part of the pipeline; the threaded connector is connected with a hose, the front end of the hose is connected with an inner cavity of the threaded connector, the rear end of the hose is positioned at a tail end pipe orifice at the lower part of the pipeline, and the liquid backflow prevention structure wraps the periphery of the tail end pipe orifice at the lower part of the pipeline; forming a negative pressure type anti-reflux drainage liquid collecting structure. Has the characteristics of preventing drainage fluid from leaking, reducing specimen pollution and the like.

Description

Closed low-negative-pressure sterile drainage liquid specimen collector

Technical Field

The invention relates to a specimen collector, in particular to a closed type low negative pressure sterile drainage specimen collector. The device is suitable for collecting drainage pipeline liquid to perform culture detection of various pathogens and bacteriology and analysis of drainage liquid components. Belongs to the technical field of disposable medical instruments.

Background

In medical clinical practice, drainage fluid collectors are widely used in surgical operations and pathological examinations. However, most of the drainage liquid collectors used in the prior art are disposable hand-cover-lifting sterile specimen cups for reserving and taking various drainage liquids for culture, and medical personnel extract the liquid in the drainage bottle or the drainage bag according to the sterile operation principle and inject the liquid into the sterile cups to finish sampling. Because the structure of the drainage liquid collector is not reasonable, the following problems exist: (1) because the cup cover of the hand-lifted sterile specimen cup needs to be separated by hands when the specimen is left and taken, medical personnel easily touch the inner side surface of the container in the process of keeping and taking the specimen to cause specimen pollution and influence the culture result; (2) when medical care personnel need to pour or extract the specimen when the specimen is kept, the liquid is easy to splash and leak, the surrounding environment is polluted, the incidence rate of cross infection in a hospital is increased, and the safety of the medical care personnel and patients is threatened; (3) the existing leaving and taking mode has complex flow and long time requirement, so that the working efficiency of medical staff is reduced.

In addition, chinese patent publication discloses: the invention with the patent number of CN110898263A and the name of 'a novel negative pressure drainage fluid collector' has the following problems: the upper end of the upper part of the collector is not connected with a universal threaded joint, and the drainage tube is difficult to connect. Although the invention can be used for drainage fluid collection, the invention is not closed collection, so the invention can not be used for drainage fluid retention and delivery. The invention with the patent number of CN208943007U and the name of surgical drainage fluid collecting and culturing specimen device has the following problems: the drainage liquid collecting and culturing sample device needs to be positioned and placed on the bedside of a patient when collecting samples, influences the daily movement of the patient with a tube, is not suitable for collecting various different types of pipeline samples in surgery, is long in collecting time, and is complex in leaving and taking mode, so that the working efficiency is reduced, and the assembly is not suitable for the existing automatic assembly and cannot be produced in a large scale.

Therefore, a closed type low negative pressure sterile drainage liquid sample collector needs to be designed to solve the technical problem of the existing drainage liquid collecting method.

Disclosure of Invention

The drainage liquid collecting device aims to solve the problems that the existing drainage liquid collection is easy to leak, cross infection in hospitals and environment pollution are easy to cause, the collection consumes time and the like. Provides a closed type low negative pressure sterile drainage liquid specimen collector. The drainage fluid collection device has the prominent substantive characteristics and the obvious technical progress of ensuring the tightness of the drainage fluid collection process, preventing the drainage fluid from leaking during collection, reducing the pollution of samples, shortening the drainage fluid collection time of medical staff and the like.

The purpose of the invention can be achieved by adopting the following technical scheme:

the utility model provides a sterile drainage liquid sample collector of airtight type low negative pressure, includes collecting bottle and drainage sample input structure, its structural feature lies in: the bottle mouth of the collecting bottle is connected with a spiral bottle cap structure, the spiral bottle cap structure comprises a spiral bottle cap, a negative pressure mastoid and a hard tube, the negative pressure mastoid is arranged on the spiral bottle cap, and the inner cavity of the negative pressure mastoid is communicated with the inner cavity of the collecting bottle to form a negative pressure structure; the drainage specimen input structure is provided with a threaded joint, a pipeline upper part and a pipeline lower part, and the top end of the pipeline upper part is connected with the threaded joint to form a drainage specimen input connecting end; the lower part of the pipeline extends into the inner cavity of the collecting bottle, and a liquid backflow preventing structure is arranged at the pipe orifice at the tail end of the lower part of the pipeline; the threaded connector is connected with a hose, the front end of the hose is connected with an inner cavity of the threaded connector, the rear end of the hose is positioned at the tail end pipe orifice at the lower part of the pipeline, and the liquid backflow prevention structure wraps the periphery of the tail end pipe orifice at the lower part of the pipeline; forming a negative pressure type anti-reflux drainage liquid collecting structure.

The purpose of the invention can be achieved by adopting the following technical scheme:

furthermore, the liquid backflow prevention structure is formed by a plastic sleeve which is sleeved at the tail end of the lower part of the pipeline and is provided with a plurality of soft films, or formed by a plurality of films arranged at the tail end part of the software

Furthermore, a valve, especially a silica gel valve, is arranged at the top end of the negative pressure mastoid to form a negative pressure valve structure. The collecting bottle is of a soft bottle body structure.

Further, the threaded joint and the hose are of an integrated structure; the upper part and the lower part of the pipeline can be formed by an integrated hard pipe, and the spiral bottle cap is fixedly connected with the hard pipe and the negative pressure mastoid to form an integrated connecting structure; the spiral bottle cap, the hard tube and the negative pressure mastoid are fixedly connected to form an integral connecting structure, so that an integral spiral bottle cap structure is formed.

Furthermore, a soft plastic connecting pipe is arranged at the bottleneck of the collecting bottle, and the tail end of the soft plastic connecting pipe is connected with a sealing screw cap so as to form a sealing structure for the collecting bottle and form a liquid collecting and sealing structure.

Further, the threaded joint is a universal type pipeline threaded joint.

Furthermore, the valve is a cross-shaped silica gel flap arranged at the top end of the negative pressure mastoid and is integrally formed with the negative pressure mastoid.

Further, negative pressure mastoid is nozzle structure of short pipe, and its height is 0.5cm, and the valve that is located the top is the soft silica gel flap structure of cross, is the fovea form when this flap structure closes, extrudes soft bottle body hard, and the flap is opened and is gone out outstanding exhaust, stops to extrude bottle body flap and kick-backs, and in external gas can not get into the bottle, forms low negative pressure chamber in the bottle, does benefit to and collects different consistency drainage liquid, shortens and stays time and laborsaving.

The invention has the following outstanding advantages:

1. the drainage bottle comprises a collection bottle and a drainage sample input structure, wherein a spiral bottle cap structure is connected to the bottle mouth of the collection bottle, the spiral bottle cap structure comprises a spiral bottle cap, a negative pressure mastoid and a hard tube, the negative pressure mastoid and the hard tube are arranged on the spiral bottle cap, and the inner cavity of the negative pressure mastoid is communicated with the inner cavity of the collection bottle to form a negative pressure structure; the drainage specimen input structure is provided with a threaded joint, a pipeline upper part and a pipeline lower part, and the top end of the pipeline upper part is connected with the threaded joint to form a drainage specimen input connecting end; the lower part of the pipeline extends into the inner cavity of the collecting bottle, and a liquid backflow preventing structure is arranged at the pipe orifice at the tail end of the lower part of the pipeline; the threaded connector is connected with a hose, the front end of the hose is connected with an inner cavity of the threaded connector, the rear end of the hose is positioned at the tail end pipe orifice at the lower part of the pipeline, and the liquid backflow prevention structure wraps the periphery of the tail end pipe orifice at the lower part of the pipeline; form negative pressure formula anti-reflux drainage liquid collection structure. Therefore, the drainage fluid collecting device can solve the problems that the existing drainage fluid collection is easy to leak, cross infection in hospitals and pollution to the surrounding environment are easily caused, the collection is time-consuming and the like, and has the prominent substantive characteristics and the obvious technical progress of ensuring the tightness of the drainage fluid collecting process, preventing the drainage fluid from leaking during collection, reducing the pollution to samples, shortening the drainage fluid collecting time of medical staff and the like.

2. The drainage liquid collection device can solve the problems that the existing drainage liquid collection is easy to pollute, cross infection in hospital and surrounding environment pollution are easily caused by leakage in the drainage liquid collection process, and the collection consumes time. The drainage fluid collecting device has the beneficial effects of ensuring the tightness of the drainage fluid collecting process, preventing drainage fluid from leaking during collection, reducing specimen pollution, shortening the drainage fluid collecting time of medical personnel and realizing large-scale production.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a spiral bottle cap structure in embodiment 1 of the present invention.

Fig. 3 is a schematic structural view of a collection bottle and a post-use sealed bottle cap according to embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of a spiral bottle cap according to embodiment 1 of the present invention.

FIG. 5 is a schematic view of a spiral connector structure externally connected to a drainage collection port according to embodiment 1 of the present invention.

Fig. 6 is a schematic structural diagram of a use state of embodiment 1 of the present invention.

Detailed Description

Detailed description of the preferred embodiment 1

Referring to fig. 1, the present embodiment includes a collection bottle 9 and a drainage specimen input structure, a spiral bottle cap structure is connected to a bottleneck of the collection bottle 9, the spiral bottle cap structure includes a spiral bottle cap 6, a negative pressure mastoid 3 and a hard tube, the negative pressure mastoid 3 is arranged on the spiral bottle cap 6, and an inner cavity of the negative pressure mastoid 3 is communicated with an inner cavity of the collection bottle 9 to form a negative pressure structure; the drainage specimen input structure is provided with a threaded joint 1, a pipeline upper part 2 and a pipeline lower part 5, and the top end of the pipeline upper part 2 is connected with the threaded joint 1 to form a drainage specimen input connecting end; the lower part 5 of the pipeline extends into the inner cavity of the collecting bottle 9, and a liquid backflow preventing structure 4 is arranged at the pipe orifice at the tail end of the lower part 5 of the pipeline; the threaded connector 1 is connected with a hose 11, the front end of the hose 11 is connected with an inner cavity of the threaded connector 1, the rear end of the hose is positioned at a tail end pipe orifice of the lower part 5 of the pipeline, and the liquid backflow preventing structure 4 is wrapped around the tail end pipe orifice of the lower part 5 of the pipeline; forming a negative pressure type anti-reflux drainage liquid collecting structure.

In this embodiment:

the liquid countercurrent prevention structure 4 is formed by a plastic sleeve which is sleeved at the tail end of the lower part of the pipeline and is provided with a plurality of soft films. The collecting bottle 9 is of a soft bottle body structure.

The screwed joint 1 and the hose 11 are of an integrated structure; the upper part 2 and the lower part 5 of the pipeline can be formed by an integrated hard pipe, and the spiral bottle cap 6 is fixedly connected with the hard pipe and the negative pressure mastoid 3 to form an integrated connecting structure to form an integrated spiral bottle cap structure.

The threaded joint 1 is a universal pipeline threaded joint.

Referring to fig. 2, the bottle cap structure comprises a spiral bottle cap 6, and a negative pressure mastoid 3 and a hard tube which are arranged on the spiral bottle cap 6, wherein the hard tube is provided with a pipeline upper part 2 and a pipeline lower part 5, the top end of the pipeline upper part 2 is provided with a connecting thread 2-1, the pipeline lower part 5 extends into an inner cavity of a collecting bottle 9, the tail end of the pipeline lower part 5 is provided with an anti-reflux rubber sheet 4, and the hard tube and the negative pressure mastoid 3 are fixedly connected or flexibly connected with the spiral bottle cap 6 to form an integrated structure. The negative pressure mastoid 3 is a short pipe structure, the lower part of the short pipe structure extends into the inner cavity of the collecting bottle 9, the upper part of the short pipe structure is exposed, and the top end of the negative pressure mastoid 3 is provided with a valve 10, particularly a silica gel valve 10, to form a negative pressure valve structure.

Referring to fig. 3, a soft plastic connecting pipe 7 is arranged at the bottleneck of the collecting bottle 9, and the end of the soft plastic connecting pipe 7 is connected with a sealing screw cap 8 to form a sealing structure for the collecting bottle 9, so as to form a liquid collecting and sealing structure.

Referring to fig. 4, a connection part 6-1 is provided at the middle position of the spiral bottle cap 6 for connecting the negative pressure mastoid 3 and the hard tube, the connection part 6-1 may be a hard connection body or a soft connection body, a hard fixed connection structure is formed when the connection part 6-1 is the hard connection body, and a soft fixed connection structure is formed when the connection part 6-1 is the soft connection body.

As can be seen from fig. 4, the valve 10 is a cross-shaped silicone flap arranged at the top end of the negative pressure mastoid 3 and is integrally formed with the negative pressure mastoid 3.

In this embodiment, negative pressure mastoid 3 is nozzle stub nipple structure, and its height is 0.5cm, and the valve 10 that is located the top is the soft silica gel flap structure of cross, is the fovea form when this flap structure closes, extrudes soft bottle body hard, and the flap is opened and is outwards outstanding exhaust, stops to extrude bottle body flap and kick-backs, and in external gas can not get into the bottle, forms low negative pressure chamber in the bottle, does benefit to and collects different viscosity drainage liquid, shortens and stays time and laborsaving.

The universal pipeline threaded joint connected above the flexible hose is suitable for connecting outlets of clinical common drainage pipelines to collect drainage liquid samples of all the drainage pipelines; the plastic rubber sheet is connected below the flexible hose to prevent air in the bottle body from entering the drainage pipeline when the bottle body of the soft bottle is extruded, so that the air is discharged from the negative pressure valve, and in addition, drainage liquid can be prevented from flowing back to the drainage tube.

The anti-reflux plastic film 4 can prevent the collected drainage liquid from flowing back to the drainage tube cavity and prevent the outside air from entering the soft drainage liquid collecting bottle.

The plastic connecting pipe 7 is connected to the bottleneck and is connected with the common type and seal the spiral bottle cap 8, the common type seals the spiral bottle cap and is used for drainage liquid to collect and finish, the integral type bottle cap connecting structure is detached from the collection bottle 9, and the common type is reused to seal the spiral bottle cap 8 and seal the specimen bottle.

Referring to fig. 5, in practical application, this embodiment requires the use of a screw connector 12 with a flexible hose 13. Referring to fig. 6, a screw connector 12 having a flexible hose 13 may be externally connected to the screw connector 1, and drainage fluid may be introduced through a front port of the flexible hose 13.

The liquid backflow prevention structure 4 is formed by a plurality of soft rubber sheets (the tail end of the hose 11) sleeved at the tail end of the lower part 5 of the pipeline, so that air in the bottle body can be prevented from entering the drainage pipeline when the collection bottle (the soft bottle body) is extruded, the air is discharged from the negative pressure valve 10, and in addition, the liquid backflow prevention structure 4 can also prevent drainage liquid from flowing back to the drainage tube.

The anti-reflux structure 4 can prevent the collected drainage liquid from flowing back to the drainage tube cavity and prevent the outside air from entering the soft drainage liquid collecting bottle.

Seal spiral bottle lid 8 through setting up plastic connecting pipe 7 and connecting ordinary type in bottleneck department, seal spiral bottle lid 8 through ordinary type, can collect at the drainage liquid and finish, lift integral type bottle lid connection structure off from gathering bottle 9, reuse ordinary type and seal 8 sealed specimen bottles of spiral bottle lid.

The screwed joint 1 is connected into a whole by connecting a flexible hose 11 in the integrated bottle cap connecting structure, a lower pipeline 5 in the lower part of the inner part of the cap and an anti-reflux plastic structure 4.

Screwed joint 1 can be suitable for linking up the export of clinical drainage pipeline commonly used, connects and forms aseptic airtight drainage liquid collection structure after inseparable, and drainage liquid directly collects in soft drainage liquid receiving flask 9, collects and finishes abandoning integral type bottle lid connecting device, reuses and seals 8 sealed drainage liquid receiving flasks of spiral cover, prevents the sample and pollutes, guarantees the seal, has and guarantees to gather drainage liquid process seal, prevents to leak when drainage liquid collects, reduces the sample and pollutes. Secondly, be attached with gentle soft silica gel valve 10 in the negative pressure valve device, be the fovea form when silica gel valve 10 closes, push soft drainage liquid receiving flask 9 with strength, silica gel valve 10 is opened and is outwards outstanding the exhaust, stops to push soft drainage liquid receiving flask 9, and silica gel valve 10, in external gas can not get into the bottle, forms low negative pressure chamber in the bottle, does benefit to and collects different consistency drainage liquid, shortens and stays and get time and laborsaving.

This embodiment can freely connect with the spiral cover 8 and trade, has realized that the sample is collected and has been ended the back and use and seal 8 closed drainage bottles of spiral cover, forms obturator, prevents that the sample from leaking outward and polluting, the censorship of being convenient for.

Specific example 2:

the specific embodiment 2 of the present invention is characterized in that: the liquid-backflow preventing structure 4 is constituted by a plurality of films provided at the tip portion of the software 11. The collecting bottle 9 is of a soft bottle body structure. The length of the threaded joint 1 is about 2cm, the length of the flexible hose exposed out of the upper end of the bottle cap on the upper portion 2 of the lower pipeline in the flexible hose and the cap is about 5cm, the length of the rigid pipeline at the lower end in the cap on the upper portion 2 of the lower pipeline in the flexible hose and the cap is 2cm, the length of the rigid pipeline at the lower end of the flexible hose and the rigid pipeline at the lower end in the cap is fixedly connected with the plastic film 4 in a countercurrent prevention mode and is 3cm, the length of the nipple 3 of the negative pressure short pipe at the upper end of the spiral bottle cap of the negative pressure valve device is 0.5 cm. The rest is the same as in embodiment 1.

Specific example 3

The specific embodiment 3 of the present invention is characterized in that: the silicone valve 10 was removed. The rest is the same as embodiment 1 or embodiment.

The principle of the embodiment is as follows:

except not possessing the negative pressure flap device, the operator need last the soft drainage liquid receiving flask 9 of extrusion, and the sample drainage tube that needs to be gathered is connected immediately after the gaseous below stereoplasm pipeline 5 discharges in connecting the flap device lid from negative pressure nozzle stub mastoid 3 in the soft drainage liquid receiving flask 9, and manual pressing negative pressure nozzle stub mastoid 3 forms negative pressure mode collection drainage liquid sample. The embodiment has inflexible operation and easily pollutes the screw joint, so that the specimen collection is difficult. The remaining functions are the same as in embodiment 1.

Specific example 4

The specific embodiment 4 of the present invention is characterized in that: the plastic film 4 for preventing backflow is omitted. The rest is the same as embodiment 1 or embodiment.

The principle of the embodiment is as follows:

except that do not possess the anti-reflux principle and prevent that the external air from getting into soft drainage liquid receiving flask 9 in, arouse drainage liquid refluence to get into the drainage lumen easily among the sample collection process and cause the pollution, external air gets into soft drainage liquid receiving flask 9 in addition, can not form the negative pressure chamber, and the collection sample does not possess the seal, leads to the sample to leak easily, and all the other functions are the same with embodiment 1.

Collecting various pathogens in the liquid in the drainage pipeline by using a closed low-negative-pressure sterile drainage liquid sample collector, performing bacteriological culture detection, and analyzing the components of the drainage liquid; the closed type reserving mode reduces the pollution of the sample, and the drainage liquid avoids cross infection in a hospital and the pollution of the surrounding environment caused by leakage in the reserving process; the low-pressure suction is convenient for collecting liquid with different viscosities; be different from conventional drainage liquid and leave the mode of getting, use airtight type low negative pressure aseptic drainage liquid sample collector can shorten the sample and leave the time of getting, operate safer high-efficient.

According to the negative pressure valve device in the integrated bottle cap connecting device, the nipple-shaped projection height of the short pipe is 0.5cm, the cross-shaped soft silica gel valve is attached to the inside, the valve is in a concave shape when closed, the soft bottle body is forcibly extruded, the valve is opened and projects outwards to exhaust air, the valve of the extrusion bottle body stops rebounding, outside air cannot enter the bottle, a low negative pressure cavity is formed in the bottle, drainage liquid with different viscosities can be collected, the retention time is shortened, and labor is saved.

The universal pipeline threaded joint is connected above the flexible hose in the integrated bottle cap connecting device, and is suitable for being connected with the outlets of clinical common drainage pipelines to collect drainage liquid samples of all the drainage pipelines. The plastic rubber sheet of preventing flowing backwards is connected to flexible hose below, can prevent when the extrusion soft bottle body that the air in the body from getting into in the drainage tube, makes the air discharge from the negative pressure valve, can prevent in addition that drainage liquid from flowing backwards to the drainage tube.

The bottle neck of the invention is connected with the plastic connecting pipe to connect with the common sealing spiral bottle cap, the common sealing spiral bottle cap is used for collecting drainage liquid, the integrated bottle cap connecting device is discarded, and the common sealing spiral bottle cap is used for sealing the specimen bottle.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its concept within the scope of the present invention.

Claims (8)

1. The utility model provides a sterile drainage liquid sample collector of airtight type low negative pressure, includes collecting bottle (9) and drainage sample input structure, its characterized in that: a spiral bottle cap structure is connected to the bottle mouth of the collecting bottle (9), the spiral bottle cap structure comprises a spiral bottle cap (6), a negative pressure mastoid (3) and a hard tube, the negative pressure mastoid (3) is arranged on the spiral bottle cap (6), and the inner cavity of the negative pressure mastoid (3) is communicated with the inner cavity of the collecting bottle (9) to form a negative pressure structure; the drainage specimen input structure is provided with a threaded joint (1), a pipeline upper part (2) and a pipeline lower part (5), and the top end of the pipeline upper part (2) is connected with the threaded joint (1) to form a drainage specimen input connecting end; the lower part (5) of the pipeline extends into the inner cavity of the collecting bottle (9), and a liquid backflow preventing structure (4) is arranged at the pipe orifice at the tail end of the lower part (5) of the pipeline; the threaded connector (1) is connected with a hose (11), the front end of the hose (11) is connected with an inner cavity of the threaded connector (1), the rear end of the hose is positioned at a tail end pipe orifice of the lower part (5) of the pipeline, and a liquid backflow preventing structure (4) is wrapped around the tail end pipe orifice of the lower part (5) of the pipeline; forming a negative pressure type anti-reflux drainage liquid collecting structure.

2. The closed type low negative pressure sterile drainage liquid specimen collector of claim 1, which is characterized in that: the liquid backflow prevention structure (4) is formed by a plastic sleeve which is sleeved at the tail end of the lower part of the pipeline and provided with a plurality of soft films, or formed by a plurality of films arranged at the tail end part of the software (11).

3. The closed type low negative pressure sterile drainage liquid specimen collector of claim 1 or 2, which is characterized in that: a valve (10), in particular a silica gel valve (10), is arranged at the top end of the negative pressure mastoid (3) to form a negative pressure valve structure; the collecting bottle (9) is of a soft bottle body structure.

4. The closed type low negative pressure sterile drainage liquid specimen collector of claim 1 or 2, which is characterized in that: the screwed joint (1) and the hose (11) are of an integrated structure; the upper part (2) and the lower part (5) of the pipeline are formed by an integrated hard pipe, and the spiral bottle cap (6) is fixedly connected with the hard pipe and the negative pressure mastoid 3 to form an integrated connecting structure to form an integrated spiral bottle cap structure.

5. The closed type low negative pressure sterile drainage liquid specimen collector of claim 1 or 2, which is characterized in that: a soft plastic connecting pipe (7) is arranged at the bottleneck of the collecting bottle (9), and the tail end of the soft plastic connecting pipe (7) is connected with a sealing screw cap (8) so as to form a sealing structure for the collecting bottle (9) and form a sealing structure for completing liquid collection; the threaded joint (1) is a universal pipeline threaded joint.

6. The closed type low negative pressure sterile drainage liquid specimen collector of claim 1 or the closed type low negative pressure sterile drainage liquid specimen collector is characterized in that: the valve (10) is a cross silica gel flap arranged at the top end of the negative pressure mastoid (3) and is integrally formed with the negative pressure mastoid (3).

7. The closed type low negative pressure sterile drainage liquid specimen collector of claim 1 or 2, which is characterized in that: the negative pressure mastoid (3) is a short pipe nipple structure, the height of the negative pressure mastoid is 0.5cm, the valve (10) positioned at the top end is a cross-shaped soft silica gel valve structure, and the valve structure is in a concave shape when closed.

8. The closed type low negative pressure sterile drainage liquid specimen collector of claim 1 or 2, which is characterized in that: the pipeline threaded connector (12) with the flexible hose (13) is used for connecting the outlets of the drainage pipelines commonly used in clinic so as to collect drainage liquid samples of the drainage pipelines.

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