CN111604328A

CN111604328A - Negative pressure cleaning device for preventing sampling needle from hanging liquid

Info

Publication number: CN111604328A
Application number: CN202010284837.9A
Authority: CN
Inventors: 吴国银; 吴冬
Original assignee: Suzhou Hybiome Biomedical Engineering Co Ltd
Current assignee: Suzhou Hybiome Biomedical Engineering Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-09-01
Also published as: WO2021208356A1

Abstract

The application provides a negative pressure cleaning device for avoiding a sampling needle from hanging liquid, the negative pressure cleaning station device comprises a cleaning station body (2), a waste liquid pumping pump (4), a pipeline (5) and a negative pressure air bag (3).

Description

Negative pressure cleaning device for preventing sampling needle from hanging liquid

Technical Field

The utility model belongs to the field of medical equipment, especially, relate to a negative pressure belt cleaning device who avoids sample needle hanging liquid.

Background

In the current full-automatic chemiluminescence apparatus, the sampling needle needs to be cleaned inside and outside after the sample is added, the internal cleaning mainly avoids the interference of the sample on the next test caused by the residue of the inner wall of the needle, and the external cleaning mainly cleans the residue of the outer wall of the needle caused by trace liquid hanging or adsorption. However, after the needle tip is washed, a liquid hanging amount generally exists more or less, the liquid hanging amount is carried into the sample when the sample is sucked again, the sample is polluted and the sample or the reagent is diluted, particularly, the sample adding amount of the sample or the reagent is small, the dilution phenomenon is more serious, the accuracy of a test result is greatly influenced, and meanwhile, the randomness of the liquid hanging amount also influences the repeatability of the sample analysis result, so that the test precision is influenced.

CN 109894434 a discloses a sampling needle cleaning device and a cleaning method for preventing a sampling needle from hanging liquid, the method further controls the cleaning height of the sampling needle and the distance between the bottom end of a cleaning tube liquid outlet and the bottom end of the sampling needle in a cleaning position by controlling the length and the inclination angle of a bevel opening of the sampling needle tip, and further controls the included angle between the central axis of the cleaning tube liquid outlet and the vertical direction and the vertical distance between the cleaning tube liquid outlet and the outer wall of the sampling needle, thereby effectively reducing the probability of hanging liquid on the sampling needle tip, and improving the cleanliness of the sampling needle, but the method still cannot completely prevent the sampling needle tip from hanging liquid.

In the prior art, the sampling needle cleaning device and the cleaning method have been improved to reduce the liquid hanging on the needle tip of the sampling needle, but the sampling needle cleaning device still needs to be continuously improved so as to expect to obtain better effect of avoiding the liquid hanging on the needle tip of the sampling needle.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the technical problem that the existing sampling needle cleaning device is poor in effect of avoiding liquid hanging on the needle point of the sampling needle, the invention provides a negative pressure cleaning device for avoiding liquid hanging on the sampling needle.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention provides a negative pressure cleaning device for preventing a sampling needle from hanging liquid, which is characterized by comprising a cleaning station body 2, a waste liquid pumping pump 4, a pipeline 5 and a negative pressure air bag 3;

wherein, the cleaning station body is including strengthening the purge orifice 21, be used for adding the reinforced cleaning solution liquid injection joint 22 of reinforced cleaning solution, be used for adding ordinary outer cleaning joint 23 of ordinary cleaning solution, installation fixed plate 24, waste liquid outlet 25, ordinary purge orifice 26, step face 27, wherein step face 27 is located cleaning station body 2 upper surface, installation fixed plate 24 is fixed at cleaning station body 2 lower surface, reinforced purge orifice 21 and ordinary purge orifice 26 open side by side on step face 27, reinforced cleaning solution liquid injection joint 22 and ordinary outer cleaning joint 23 are installed on cleaning station body 2, and are located step face 27 both sides. ,

wherein, one end of the pipeline 5 passes through a waste liquid outlet 25 at the lower end of the cleaning station body 2 and is respectively connected with a reinforced cleaning liquid injection joint 22 and a common external cleaning joint 23, the other end of the pipeline 5 is connected with a waste liquid pump 4, and the negative pressure air bag 3 is connected on the pipeline 5.

Preferably, the common external cleaning joint comprises a step structure 231, a water inlet 232 and a water outlet 234, wherein the step structure 231 is connected with the pipeline 5, and the water inlet 234 is connected with the liquid injection pump through the pipeline 5.

Preferably, the negative pressure air bag 3 is connected to the pipeline 5 through a three-way joint;

preferably, the vertical distance between the negative pressure air bag 3 and the mounting and fixing plate 24 is shorter than that between the negative pressure air bag 3 and the liquid pump 4, and the negative pressure air bag 3 is closer to the mounting and fixing plate 24, so that the hanging liquid on the outer wall of the needle point can be effectively sucked.

Further, the cleaning station body 2 comprises two common external cleaning joints 23 and a reinforced cleaning solution injection joint 22, wherein the two common external cleaning joints 23 are respectively positioned at two sides of a common cleaning hole 26, and the reinforced cleaning solution injection joint 22 is positioned at one side of a reinforced cleaning hole; when the needle point of the sampling needle 1 is cleaned in the common cleaning hole 26, the two common outer cleaning joints are opened simultaneously, so that the needle point can be more effectively washed.

Further preferably, the cleaning device in the negative pressure gasbag produced negative pressure be 0.1 ~ 0.2Mpa, the inventor finds through the research that, when negative pressure is 0.1 ~ 0.2Mpa, can effectively absorb the hanging liquid of needle point outer wall, pressure is too low, the negative pressure of production can not effectively absorb needle point outer wall hanging liquid, and when pressure is too big, can lead to unnecessary energy consumption again to and produce bad consequence to the needle point.

The invention has the beneficial effects that:

compared with the prior art, the negative pressure air bag is additionally arranged below the cleaning station, after the inside and outside washing of the needle is finished, the negative pressure air bag releases the negative pressure instantly, so that the hanging liquid remained on the outer wall of the needle point is absorbed and pulled down, and is discharged by the waste liquid pump, and the hanging liquid on the outer wall of the needle point is greatly reduced or even eliminated.

Drawings

FIG. 1 is a schematic view of a negative pressure cleaning device for preventing a sampling needle from hanging liquid;

FIG. 2 is an overall schematic view of the cleaning station body;

FIG. 3 is a partial schematic view of the cleaning station body;

FIG. 4 is a schematic view of an enhanced cleaning fluid injection fitting and a conventional cleaning fitting;

FIG. 5 is a schematic view of the upper portion of the cleaning station body;

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

Examples

The embodiment provides a sampling needle cleaning device for avoiding liquid hanging of a sampling needle, which comprises a cleaning station body, a waste liquid pumping pump, a pipeline and a negative pressure air bag, wherein the cleaning station body comprises a reinforced cleaning hole, a reinforced cleaning liquid injection joint for adding reinforced cleaning liquid, a common outer cleaning joint for adding common cleaning liquid, an installation fixing plate, a waste liquid outlet, a common cleaning hole and a step surface, the step surface is positioned on the upper surface of the cleaning station body, the installation fixing plate is fixed on the lower surface of the cleaning station body, the reinforced cleaning hole and the common cleaning hole are opened on the step surface side by side, the reinforced cleaning liquid injection joint and the common outer cleaning joint are installed on the cleaning station body and positioned on two sides of the step surface,

wherein, the waste liquid export of the one end of pipeline passes cleaning station body lower extreme is gone into liquid joint and is linked to each other with the ordinary outer joint that washs with intensive washing liquid respectively, and the other end of pipeline is connected with the drawing liquid pump, and the negative pressure gasbag passes through three way connection and connects on the pipeline especially when the negative pressure gasbag is nearer apart from the installation fixed plate, can more effective absorption needle point outer wall hang liquid.

The cleaning station body comprises two common outer cleaning joints and a reinforced cleaning solution injection joint; when the needle point is cleaned in the common cleaning hole, the two common outer cleaning joints are opened simultaneously, so that the needle point can be more effectively washed.

During cleaning, the sampling needle 1 can be inserted into a reinforced cleaning hole and a common cleaning hole along the vertical direction, preferably, during cleaning, the sampling needle is firstly inserted into the reinforced cleaning hole along the vertical direction, cleaning liquid is injected from a reinforced cleaning liquid injection joint, sampling is uniformly absorbed and discharged aiming at the reinforced cleaning liquid, then common cleaning is carried out, during common cleaning, a water inlet of the common external cleaning joint is connected with a liquid injection pump through a pipeline, the liquid injection pump is started, the sampling needle is taken out from the reinforced cleaning hole and is inserted into the common cleaning hole along the vertical direction, the common external cleaning joint is used for injecting, flushing and flushing a needle point, preferably, two common external cleaning joints are started simultaneously, external cleaning liquid injection is closed after flushing for about 2s, at the moment, a negative pressure pump is started, a negative pressure air bag generates negative pressure of about 0.1-0.2 MPa, the negative pressure air bag instantly releases negative pressure to suck down needle point external wall hanging, the waste liquid pump always works in the whole cleaning process, and the generated waste liquid is pumped away by the waste liquid pump through the waste liquid outlet.

In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. A negative pressure cleaning device for preventing a sampling needle from hanging liquid is characterized by comprising a cleaning station body (2), a waste liquid pumping pump (4), a pipeline (5) and a negative pressure air bag (3);

wherein the cleaning station body (2) comprises a reinforced cleaning hole (21), a reinforced cleaning liquid injection joint (22) for adding reinforced cleaning liquid, a common outer cleaning joint (23) for adding common cleaning liquid, an installation fixing plate (24), a waste liquid outlet (25), a common cleaning hole (26) and a step surface (27), wherein the step surface (27) is positioned on the upper surface of the cleaning station body, the installation fixing plate (24) is fixed on the lower surface of the cleaning station body, the reinforced cleaning hole (21) and the common cleaning hole (26) are opened on the step surface (27) side by side, the reinforced cleaning liquid injection joint (22) and the common cleaning joint (23) are installed on the cleaning station body and positioned on two sides of the step surface (27),

wherein, one end of the pipeline (5) passes through a waste liquid outlet (25) at the lower end of the cleaning station body (2) and is respectively connected with the reinforced cleaning liquid injection joint (22) and the common external cleaning joint (23), the other end of the pipeline (5) is connected with the waste liquid pump (4), and the negative pressure air bag (3) is connected on the pipeline (5).

2. The cleaning device according to claim 1, wherein the common outer cleaning joint (23) comprises a step structure (231), a water inlet (232) and a water outlet (234), wherein the step structure (231) is connected with the pipeline (5), and the water inlet (234) is connected with the liquid injection pump through the pipeline (5).

3. The cleaning device according to any one of claims 1 to 2, wherein the negative pressure air bag (3) is connected to the pipeline (5) by a tee joint.

4. A cleaning device according to claim 3, characterized in that the negative pressure bladder (3) is located closer to the mounting plate (24) than to the waste pump (4).

5. The cleaning device according to any one of claims 1 to 2, characterized in that the cleaning station body (2) comprises two common external cleaning connections (23) and one intensified cleaning liquid injection connection (22).

6. The cleaning device according to any one of claims 1 to 2, wherein the negative pressure generated by the negative pressure air bag is 0.1 to 0.2 Mpa.