CN217569991U

CN217569991U - Swab with double-ring cavity for cleaning sampling needle

Info

Publication number: CN217569991U
Application number: CN202221362083.5U
Authority: CN
Inventors: 郝书顺; 赵冯; 杨娇
Original assignee: Hebai Nanjing Medical Technology Co ltd
Current assignee: Hebai Nanjing Medical Technology Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-10-14
Anticipated expiration: 2032-06-02

Abstract

The utility model discloses a swab of washing sampling needle with dicyclo chamber, include the frame and insert the swab in the frame, the washing chamber of vertically running through the swab is seted up to the swab, the frame inboard is provided with mutually independent first annular and holds pressure chamber and second annular and hold the pressure chamber, first annular holds pressure chamber and second annular and holds the pressure chamber and distribute from top to bottom, first annular holds and is provided with a plurality of first connecting holes between pressure chamber and the washing chamber, second annular is held and is provided with a plurality of second connecting holes between pressure chamber and the washing chamber, the frame lateral wall is provided with first runner and second runner, be provided with the third connecting hole between first runner and the first annular pressure chamber, be provided with the fourth connecting hole between second runner and the second annular pressure chamber, first connecting hole and third connecting hole dislocation distribution, second connecting hole and fourth connecting hole dislocation distribution. The utility model discloses reduce the weeping condition, improved the negative pressure rate of utilization, improved the cleaning performance.

Description

Swab with double-ring cavity for cleaning sampling needle

Technical Field

The utility model belongs to the technical field of medical instrument inspection, concretely relates to swab of washing sampling needle with dicyclo chamber.

Background

Many of the metrological and analytical devices in modern medical instruments require the use of a sampling needle which is frequently reused over an extended period of time, a common problem being carryover, i.e. residual liquids or contaminants remaining in or possibly being absorbed by the sampling needle. These residues mix with subsequent sample or reagent entering the sampling needle and may interfere with subsequent analysis. Before the next use, the residual sample carrying pollution on the inner surface and the outer surface of the sampling needle must be thoroughly cleaned so as to avoid influencing the detection of the next sample.

At present, the outer wall of the sampling needle is cleaned by a swab which is provided with a cleaning cavity, a cleaning solution inlet hole and a cleaning solution outlet hole which are communicated with the cleaning cavity in the industry. The cleaning solution inlet and outlet holes of the swab are respectively connected with a cleaning solution container capable of generating positive pressure and a waste liquid container capable of generating negative pressure through pipelines, the needle body of the sampling needle penetrates through a cleaning cavity of the swab as much as possible (the state is also the normal state of the sampling needle, and the state is also the state when a detected sample is sucked), the positive pressure and the negative pressure are opened, the cleaning solution is sprayed into the cleaning cavity through the cleaning solution inlet hole, and the cleaning solution is sucked out of the waste liquid container from the cleaning solution outlet hole under the action of the negative pressure, so that the cleaning of the outer wall of the sampling needle of the length section (and the length of the interval between the cleaning solution inlet hole and the cleaning solution outlet hole) through which the cleaning solution flows in the cleaning cavity is completed; the existing swab is in a three-layer structure, the upper layer and the lower layer are sealed, the middle layer only depends on assembly pressure to meet the sealing effect, and the problem of negative pressure loss caused by reduction of air tightness exists.

Meanwhile, in the existing structure, one of the liquid outlet holes is opposite to the water outlet, and the phenomenon of uneven liquid outlet pressure relative to the other Kong Yi is easy to cause uneven cleaning, so that the residue cannot meet the cleaning requirement. The upper end and the lower end are sealed in a double-layer way, and leakage possibly exists between the water inlet cavity and the water outlet cavity to cause pollution.

And under the structural condition of the existing swab, the liquid inlet and the liquid outlet are at right angles with the cleaning chamber, and the kinetic energy loss of the liquid is aggravated under the design, so that the energy proportion for cleaning is reduced. And because the liquid outlet is perpendicular to the sampling needle, the high-speed water flow directly impacts the sampling needle to cause cavitation after long-term use, so that the sealing performance of the swab is damaged to cause leakage and pollution to influence the cleaning effect, the sampling needle is scrapped if the sampling needle is heavy, the service life of the device is greatly shortened, and the situation that the sampling needle is clamped by the remaining solid particles after the washing liquid is volatilized at the guide section of the cleaning cavity after long-term use is caused.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a swab of washing sampling needle with dicyclo chamber can effectively improve the flow that washing liquid got into clean cavity, improves the cleaning performance of sampling needle, solves swab negative pressure loss problem and alleviates the problem that liquid erodees the cavitation phenomenon that the swab caused.

The utility model discloses take following technical scheme to realize:

the utility model provides a wash swab of sampling needle with dicyclo chamber, includes the frame and inserts the swab in the frame, the washing chamber of vertically running through the swab is seted up to the swab, the frame inboard is provided with first annular of mutual independence and holds pressure chamber and second annular and hold and press the chamber, first annular holds pressure chamber and second annular and holds and press the chamber to distribute from top to bottom, be provided with a plurality of first connecting holes between first annular pressure chamber and the washing chamber, second annular is held and is provided with a plurality of second connecting holes between pressure chamber and the washing chamber, first annular is held and is pressed the chamber outside and be provided with first runner, be provided with the third connecting hole between first runner and the first annular pressure chamber, second annular pressure chamber outside is provided with the second runner, second runner and second annular are held and are pressed and are provided with the fourth connecting hole between the chamber, first connecting hole and third connecting hole dislocation distribution, second connecting hole and fourth connecting hole dislocation distribution.

In order to optimize the technical scheme, the specific measures adopted further comprise:

furthermore, the washing cavity comprises a first-stage cavity, a second-stage cavity and a third-stage cavity, the first-stage cavity, the second-stage cavity and the third-stage cavity are sequentially connected, and the first-stage cavity, the second-stage cavity and the third-stage cavity are of variable diameter structures from small to large.

Further, the swab body comprises an end cover and a swab body, the end cover is arranged at the upper end of the swab body, and the washing cavity penetrates through the end cover and the swab body.

Further, first annular pressure accumulation chamber upper end is provided with first sealing washer, be provided with the second sealing washer between first annular pressure accumulation chamber and the second annular pressure accumulation chamber, second annular pressure accumulation chamber lower extreme is provided with the second sealing washer, be provided with first holding ring and second holding ring on the swab body lateral wall, first holding ring supports and leans on in first sealing washer upper end, the second holding ring supports and leans on in second sealing washer upper end.

Further, the diameter of the first annular pressure accumulation chamber is larger than the diameter of the second annular pressure accumulation chamber.

Furthermore, the first connecting holes are circumferentially distributed on the side wall of the secondary cavity, and the second connecting holes are circumferentially distributed on the side wall of the tertiary cavity.

Further, first connecting hole and second connecting hole all are certain angle slope setting, the incline direction of first connecting hole and second connecting hole is opposite.

Further, the diameters of the third connecting hole and the fourth connecting hole are larger than the diameters of the first connecting hole and the second connecting hole.

The utility model has the advantages that:

compared with the prior art, the utility model discloses a swab of washing sampling needle with dicyclo chamber, simple structure is reasonable, holds pressure chamber, second annular through the multistage cavity in washing chamber, first annular and holds the setting of pressure chamber and a plurality of connecting hole, adds the sealing washer, has reduced the weeping condition, has improved the negative pressure rate of utilization, has improved the cleaning performance.

According to the invention, by arranging the horizontal included angles between the first connecting hole and the washing cavity and the horizontal included angles between the second connecting hole and the washing cavity, the washing liquid is enabled to be in smooth transition, the loss of washing kinetic energy is reduced, the washing effect of the washing liquid is increased, the cavitation phenomenon caused by the fact that the sampling needle is vertically washed by high-speed liquid is relieved, the service lives of the swab and the sampling needle are prolonged, and the maintenance cost is reduced.

Drawings

Fig. 1 is a schematic view of a swab with a double-ring cavity for cleaning a sampling needle according to the present invention.

Fig. 2 is a rear view of a swab with a double-ring cavity for cleaning a sampling needle of the present invention.

Fig. 3 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2 according to the present invention.

Fig. 4 is a left side view of fig. 2 of the present invention.

Fig. 5 is a cross-sectional view taken along line B-B of fig. 4 according to the present invention.

The reference signs are: the swab body comprises an outer frame 10, a first annular pressure accumulation cavity 11, a second annular pressure accumulation cavity 12, a first flow channel 13, a second flow channel 14, a third connecting hole 15, a fourth connecting hole 16, a first positioning ring 17, a second positioning ring 18, a swab 20, an end cover 21, a swab body 22, a first connecting hole 23, a second connecting hole 24, a washing cavity 30, a primary cavity 31, a secondary cavity 32, a tertiary cavity 33, a sampling needle 40, a first sealing ring 50, a second sealing ring 60 and a third sealing ring 70.

Detailed Description

In order to clarify the technical solution and the working principle of the present invention, the present invention will be further described in detail with reference to the following embodiments with reference to the accompanying drawings, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

The utility model provides a swab with a double-ring cavity for cleaning a sampling needle, which is shown in figures 1 to 5, and comprises an outer frame 10 and a swab 20 inserted in the outer frame 10, wherein the sampling needle 40 is inserted in the swab 20.

Swab 20 includes end cover 21 and swab body 22, end cover 21 sets up in swab body 22 upper end, swab 20 has been seted up and has been vertically run through the washing chamber 30 of swab, washing chamber 30 runs through end cover 21 and swab body 22, washing chamber 30 includes one-level cavity 31, second grade cavity 32 and tertiary cavity 33, one-level cavity 31, second grade cavity 32 and tertiary cavity 33 connect gradually, one-level cavity 31, second grade cavity 32 and tertiary cavity 33 are by little big reducing structure, sampling needle 40 inserts in washing chamber 30, can understand: the second-stage cavity 32 and the third-stage cavity 33 of the washing cavity 30 are cleaning areas, the diameter of the sampling needle 40 is equal to that of the first-stage cavity 31, the sampling needle 40 can be conveniently inserted into the first-stage cavity 31, the diameters of the second-stage cavity 32 and the third-stage cavity 33 are both larger than that of the sampling needle 40, a circle of 360-degree dead-angle-free annular gap is formed between the second-stage cavity 32, the third-stage cavity 33 and the sampling needle 40, 360-degree dead-angle-free uniform washing of cleaning liquid is facilitated, the surface of the sampling needle 40 is punctured, and the cleaning effect is improved; meanwhile, the washing liquid flows from bottom to top after entering the washing cavity 30, and the flow speed of the washing liquid is increased due to the gradual decrease of the diameter of the channel of the washing cavity 30, so that the washing liquid in the swab 20 can be washed and flushed conveniently.

The inner side of the outer frame 10 is provided with a first annular pressure accumulation cavity 11 and a second annular pressure accumulation cavity 12 which are mutually independent, the first annular pressure accumulation cavity and the second annular pressure accumulation cavity are distributed up and down, the diameter of the first annular pressure accumulation cavity is larger than that of the second annular pressure accumulation cavity, a plurality of first connecting holes are arranged between the first annular pressure accumulation cavity and the washing cavity, a plurality of second connecting holes are arranged between the second annular pressure accumulation cavity and the washing cavity, the first connecting holes and the second connecting holes are both arranged on the swab body, the number of the first connecting holes and the second connecting holes is set according to requirements, in the embodiment, the number of the first connecting holes and the second connecting holes is 6, the first connecting holes are circumferentially distributed on the side wall of the second-level cavity, the second connecting holes are circumferentially distributed on the side wall of the third-level cavity, and the first connecting holes and the second connecting holes are both obliquely arranged at a certain angle, the sampling needle clearance forms 360 degrees of the annular clearance at no dead angles of round and is favorable to the even washing at 360 degrees of washing liquid no dead angles and punctures the sampling needle surface, and the inclination that improves the cleaning performance setting is set for as required, in this embodiment, the slope opposite direction of first connecting hole and second connecting hole, the frame lateral wall is provided with first runner and second runner, is provided with the third connecting hole between first runner and the first annular pressure storage chamber, and the inclination that is provided with first connecting hole of fourth connecting hole and second connecting hole between second runner and the second annular pressure storage chamber is 10-20, and the diameter of third connecting hole and fourth connecting hole all is greater than the diameter of first connecting hole and second connecting hole, first connecting hole and third connecting hole staggered distribution, second connecting hole and fourth connecting hole staggered distribution. It can be understood that: first flow channel is as the delivery port, the second flow channel is as the water inlet, be used for keeping in the washing liquid between first annular pressure storage chamber and the second annular pressure storage chamber, reduce the washing liquid to the impact force of sampling needle, the first connecting hole and the second connecting hole that the slope set up simultaneously, and the first connecting hole and the third connecting hole of dislocation distribution, the second connecting hole and the fourth connecting hole of dislocation distribution, make the more efficient smooth transition of washing liquid in two cavities, the effectual washing liquid of having alleviated is to the right angle lateral wall impact force, reduce the cavitation erosion to the sampling needle material, effectively increase the negative pressure utilization ratio, extension swab life.

Specifically, for the sealed effect of reinforcing, first annular is held pressure chamber upper end and is provided with first sealing washer, be provided with the second sealing washer between first annular is held pressure chamber and the second annular is held pressure chamber, second annular is held pressure chamber lower extreme and is provided with the third sealing washer, be provided with first holding ring and second holding ring on the swab body lateral wall, first holding ring supports and leans on in first sealing washer upper end, the second holding ring supports and leans on in second sealing washer upper end. It can be understood that: the triple sealing rings form a high-sealing environment, the negative pressure loss rate is reduced, and the cleaning efficiency is improved.

The utility model discloses a theory of operation does:

washing liquid enters from the second flow channel under the action of external positive pressure, enters the second annular pressure accumulation cavity through the fourth connecting hole to form a fountain, negative pressure outside forms negative pressure in the working cavity of the swab through the first flow channel to generate suction force on the washing liquid, the washing liquid washes the outer surface of the puncture sampling needle from the third-stage cavity, then flows to the first flow channel through the first connecting hole and the first annular pressure accumulation cavity in sequence, and flows to the external recovery container; meanwhile, the sampling needle moves up and down in the working cavity under the action of an external power source, so that all parts on the outer surface of the puncture sampling needle are washed and dried.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that modifications and embellishments within the scope of the present disclosure may be made by those skilled in the art without departing from the spirit of the present disclosure.

Claims

1. A swab with a double-ring cavity for cleaning a sampling needle is characterized in that: including the frame and insert the swab in the frame, the washing chamber of vertically running through the swab is seted up to the swab, the frame inboard is provided with mutually independent first annular and holds pressure chamber and second annular and hold and press the chamber, first annular holds and presses chamber and second annular to hold and press the chamber and distribute from top to bottom, first annular is held and is pressed and is provided with a plurality of first connecting holes between chamber and the washing chamber, the second annular is held and is pressed and is provided with a plurality of second connecting holes between chamber and the washing chamber, the frame lateral wall is provided with first runner and second runner, be provided with the third connecting hole between first runner and the first annular pressure chamber, second runner and second annular are held and are pressed and are provided with the fourth connecting hole between the chamber, first connecting hole and third connecting hole dislocation distribution, second connecting hole and fourth connecting hole dislocation distribution.

2. A swab with a double-ring chamber for washing a sampling needle according to claim 1, wherein: the washing cavity comprises a primary cavity, a secondary cavity and a tertiary cavity, the primary cavity, the secondary cavity and the tertiary cavity are sequentially connected, and the primary cavity, the secondary cavity and the tertiary cavity are of variable diameter structures from small to large.

3. A swab with a double-ring chamber for washing a sampling needle according to claim 2, wherein: the swab body comprises an end cover and a swab body, the end cover is arranged at the upper end of the swab body, and the washing cavity penetrates through the end cover and the swab body.

4. A swab with a double loop chamber for washing a sampling needle, according to claim 3, wherein: first annular pressure accumulation chamber upper end is provided with first sealing washer, be provided with the second sealing washer between first annular pressure accumulation chamber and the second annular pressure accumulation chamber, second annular pressure accumulation chamber lower extreme is provided with the second sealing washer, be provided with first holding ring and second holding ring on the swab body lateral wall, first holding ring supports and leans on in first sealing washer upper end, the second holding ring supports and leans on in second sealing washer upper end.

5. A swab with a double-ring cavity for washing a sampling needle according to claim 4, wherein: the diameter of the first annular pressure accumulation cavity is larger than the diameter of the second annular pressure accumulation cavity.

6. A swab with a double-ring cavity for washing a sampling needle according to claim 5, wherein: the first connecting holes are circumferentially distributed on the side wall of the secondary cavity, and the second connecting holes are circumferentially distributed on the side wall of the tertiary cavity.

7. A swab with a double-ring cavity for washing a sampling needle according to claim 6, wherein: first connecting hole and second connecting hole all are certain angle slope setting, the incline direction of first connecting hole and second connecting hole is opposite.

8. A swab with a double-ring cavity for washing a sampling needle according to claim 7, wherein: the diameters of the third connecting hole and the fourth connecting hole are larger than the diameters of the first connecting hole and the second connecting hole.