CN109201641B - Anti-overflow device for cleaning device - Google Patents
Anti-overflow device for cleaning device Download PDFInfo
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- CN109201641B CN109201641B CN201811102518.0A CN201811102518A CN109201641B CN 109201641 B CN109201641 B CN 109201641B CN 201811102518 A CN201811102518 A CN 201811102518A CN 109201641 B CN109201641 B CN 109201641B
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- inner hole
- cleaning
- flaps
- baffle plates
- sample needle
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- 238000004140 cleaning Methods 0.000 title claims abstract description 157
- 230000001174 ascending effect Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 70
- 230000000903 blocking effect Effects 0.000 abstract description 21
- 230000004308 accommodation Effects 0.000 abstract description 13
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 84
- 238000005406 washing Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 12
- 239000012530 fluid Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000003018 immunoassay Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/023—Cleaning the external surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
Abstract
The invention relates to an overflow prevention device for a cleaning device, comprising: the body part is an annular structure body with an inner hole, and is provided with a first end and a second end which are opposite along the axial direction of the inner hole; one or more blocking pieces extending from a wall portion of the inner bore in a radial direction of the inner bore to form a rotation passage in the inner bore which is spirally raised toward the first end, and a predetermined accommodation space being formed in the radial direction of the inner bore. According to the overflow preventing device provided by the invention, the baffle capable of forming the spiral ascending rotating channel is arranged in the inner hole of the body part, so that the cleaning liquid can be prevented from overflowing from the cleaning tank of the cleaning device, and the overflow preventing device is simple in structure and easy to realize.
Description
Technical Field
The invention relates to the technical field of medical diagnosis equipment, in particular to an anti-overflow device for a cleaning device.
Background
The biochemical luminous immunoassay has the advantages of high sensitivity, wide linear range, convenient and quick operation and the like, and is widely applied in the clinical examination field. Currently, biochemical light emitting measuring instruments based on biochemical light emitting immunoassay have become mature medical diagnostic devices. The biochemical luminescence measurement requires that the sample is sucked through the sample needle to react with the relevant reagent, and in order to avoid the pollution carried by the sample needle from affecting the detection result, the sample needle for sampling must be clean.
There are two prior art approaches to solving this problem: firstly, use head insulating disposable suction head, but this kind of method consumptive material loss is big, and the cost is high, has also restricted the use of liquid level detection. And secondly, a reusable metal probe is adopted, and the sample needle is cleaned before each sampling, for example, an ultrasonic cleaning device or a cleaning solution flushing technology is adopted to clean the sample needle so as to control the carrying pollution between samples.
The ultrasonic cleaning device has higher cost, complex structure and inconvenient later maintenance; the cleaning device used in the current cleaning liquid flushing technology ensures that the water pressure and the flow velocity formed by the cleaning liquid in the cleaning pool are poor in cleaning effect on the sample needle, cannot meet the standard requirement of carrying pollution rate, and has the risk that the cleaning liquid overflows the cleaning pool, so that the reliability is lower.
Disclosure of Invention
The invention aims to provide an overflow preventing device for a cleaning device, which can prevent cleaning liquid from overflowing from a cleaning tank of the cleaning device.
The embodiment of the invention provides an anti-overflow device for a cleaning device, which comprises: the body part is an annular structure body with an inner hole, and is provided with a first end and a second end which are opposite along the axial direction of the inner hole; one or more blocking pieces extending from a wall portion of the inner hole in a radial direction of the inner hole to form a spirally rising rotation passage toward the first end in the inner hole, and a predetermined accommodation space being formed in the radial direction of the inner hole.
According to one aspect of the embodiment of the invention, the number of the baffle plates is a plurality, each baffle plate is inclined towards the first end, and the baffle plates are distributed in a spiral step shape along the circumferential direction of the inner hole to form a rotating channel.
According to one aspect of the embodiment of the present invention, the value range of the helix angle β of each baffle is: beta is more than or equal to 15 degrees and less than or equal to 25 degrees.
According to an aspect of the embodiment of the present invention, two adjacent flaps have a predetermined interval in the axial direction and are continuously distributed in the circumferential direction, and a flap adjacent to the second end in the axial direction among the plurality of flaps partially overlaps with a flap adjacent to the first end in the circumferential direction.
According to an aspect of the embodiment of the present invention, a circumferential angle θ1 of a baffle plate near the second end among the plurality of baffle plates along the inner hole satisfies formula (1), and a circumferential angle θ2 of the remaining baffle plates along the inner hole satisfies formula (2):
θ1>360/n (1)
θ2＝360/n (2)
wherein n is the number of the baffle plates.
According to one aspect of the embodiment of the invention, a concave edge is formed on the side, away from the inner hole, of each baffle plate, and the edges of the baffle plates form a preset accommodating space.
According to an aspect of the embodiment of the present invention, the projection of the predetermined accommodation space on a plane perpendicular to the axial direction is a bar-shaped hole or an elliptical hole.
According to one aspect of the embodiment of the invention, the number of the baffle plates is four, the preset accommodating space comprises a second position corresponding to the central axis of the inner hole, one side, away from the inner hole, of two adjacent baffle plates in the four baffle plates is respectively provided with a 1/4 circular arc edge which is coaxial with the inner hole and concave inwards, the other side, away from the inner hole, of the two baffle plates is respectively provided with a special-shaped edge which consists of a straight line section and a concave 1/4 circular arc, and the two 1/4 circular arc edges and the two special-shaped edges jointly form a strip-shaped hole.
According to one aspect of the embodiment of the invention, the number of the baffle plates is four, the preset accommodating space comprises a second position corresponding to the central axis of the inner hole, one side, away from the inner hole, of two adjacent baffle plates in the four baffle plates is respectively provided with a first arc-shaped edge which is coaxial with the inner hole and concave inwards, one side, away from the inner hole, of the other two baffle plates is respectively provided with a second arc-shaped edge, and the two first arc-shaped edges and the two second arc-shaped edges form an elliptical hole together.
According to one aspect of an embodiment of the invention, the second end of the body portion is provided with a flange projecting outwardly around the bore, the flange being capable of extending into the opening of the wash basin; or, the second end of the body part is provided with a groove recessed along the axial direction, and the opening of the cleaning tank can extend into the groove.
According to the anti-overflow device for the cleaning device, provided by the embodiment of the invention, the baffle capable of forming the spiral ascending rotating channel is arranged in the inner hole of the body part, so that the cleaning liquid can be prevented from overflowing from the cleaning tank of the cleaning device, and the anti-overflow device is simple in structure and easy to realize.
Drawings
Fig. 1 is a schematic structural view of a cleaning device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a cleaning tank of the cleaning apparatus shown in FIG. 1;
FIG. 3 is a cross-sectional view of the wash basin shown in FIG. 2 in the direction A-A;
FIG. 4 is a schematic view showing the effect of cleaning a sample needle in a second chamber of the cleaning section;
FIG. 5 is a schematic view of another cleaning section of the cleaning tank shown in FIG. 2;
FIG. 6 is a schematic cross-sectional view of another cleaning tank provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic top view of the wash basin of FIG. 6;
FIG. 8 is a schematic view of another cleaning device according to an embodiment of the present invention with the liquid supply device and the liquid discharge device removed;
FIG. 9 is a schematic view of the overflow preventing means of the cleaning device shown in FIG. 8;
FIG. 10 is a longitudinal cross-sectional view of the spill guard shown in FIG. 9;
FIG. 11 is a top view of the spill guard shown in FIG. 9;
FIG. 12 is a top view of another anti-overflow device provided in an embodiment of the invention;
FIG. 13 is a block flow diagram of a sample needle cleaning method provided by an embodiment of the present invention;
fig. 14 is a flow velocity distribution diagram of the cleaning liquid at the end of the sample needle when the sample needle is cleaned by the sample needle cleaning method shown in fig. 13, and the distance h=1 mm between the sample needle and the bottom surface of the second chamber;
fig. 15 is a flow velocity distribution diagram of the cleaning liquid at the end of the sample needle when the sample needle is cleaned by the sample needle cleaning method shown in fig. 13, and the distance h=5 mm between the sample needle and the bottom surface of the second chamber;
fig. 16 is a flow velocity distribution diagram of the cleaning liquid at the end of the sample needle when the sample needle is cleaned by the sample needle cleaning method shown in fig. 13, and the distance h=7 mm between the sample needle and the bottom surface of the second chamber.
Wherein:
1-a first chamber; 2-a second chamber; 1 A-A first opening; 1 b-outlet; 2 A-A second opening; 3-side walls; 3 A-A first sidewall; 3 b-a second sidewall; 4-an overflow trough; 11-a cleaning part; 12-reinforcing ribs; x-a first direction; alpha-predetermined angle; beta-helix angle; p1-a first position; p2-second position; l-a predetermined distance; l1-a first depth dimension; l2-a second depth dimension;
10-cleaning a pool; 20-a liquid supply device; 30-draining device; 40-an anti-overflow device; 41-a body portion; 13 42-baffle plates; 41 A-A first end; 41 b-a second end; 41 c-an inner bore; c-an accommodation space; 43-1/4 arc edge; 44-profiled edges; 14 45-bar-shaped holes or oval holes; 46-a first arcuate edge; 47-a second arcuate edge; 48-flange.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the invention. In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
For a better understanding of the present invention, a cleaning tank, a cleaning device, an anti-overflow device and a sample needle cleaning method according to embodiments of the present invention are described in detail below with reference to fig. 1 to 16.
Referring to fig. 1, an embodiment of the present invention provides a cleaning apparatus including a cleaning tank 10, a liquid supply device 20, and a liquid discharge device 30.
The liquid supply device 20 communicates with one end of the sample needle N having an inner wall and an outer wall to supply a cleaning liquid for cleaning the sample needle N. The other end of the sample needle N extends into the washing tub 10 to wash the inner and outer walls of the sample needle N. The drain 30 is for receiving the waste liquid flowing from the wash tank 10.
The specific structure of the cleaning tank 10 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 2 and 3 together, the cleaning tank 10 has a first chamber 1, a first opening 1a and an outlet 1b communicating with the first chamber 1, a cleaning portion 11 is disposed in the first chamber 1, the cleaning portion 11 has a second chamber 2 and a second opening 2a communicating with the second chamber 2, and the second opening 2a is disposed in the same direction as the first opening 1a.
The second chamber 2 has a bottom surface 2b opposite to the second opening 2a and a side wall 3 connecting the bottom surface 2b and the second opening 2a, the side wall 3 including a first side wall 3a extending upward from the bottom surface 2b by a predetermined distance and a second side wall 3b located between the first side wall 3a and the second opening 2a, the second side wall 3b being tapered in a first direction X from the bottom surface 2b to the second opening 2 a.
Thereby, the liquid supply device 20 supplies a stable flow rate of the cleaning liquid into the cleaning reservoir 10, the space between the wall portion of the first chamber 1 and the cleaning portion 11 is used for cleaning the inner wall of the sample needle N, the second chamber 2 of the cleaning portion 11 is used for cleaning the outer wall of the sample needle N, and generally only the region 3mm from the end portion of the sample needle N is cleaned, and the cleaning liquid flows out to the liquid discharge device 30 through the outlet 1 b.
Specifically, referring to fig. 4, the cleaning liquid is cleaned from the inner wall of the sample needle N during the process of flowing out of the sample needle N, and the greater the flow rate q provided by the liquid supply device 20, the cleaner the inner wall of the sample needle N is cleaned. When the sample needle N moves into the second chamber 2 of the cleaning part 11 and has a distance h from the bottom surface 2b, the cleaning fluid flowing out of the sample needle N first impacts the bottom surface 2b of the second chamber 2 and rapidly flows to both sides of the bottom surface 2b, and under the action of the first sidewall 3a, the cleaning fluid moves upward through the rebound of the bottom surface 2b and flow reversing occurs under the action of the tapered second sidewall 3b, so that the cleaning fluid is guided to clean the outer wall of the sample needle N.
There is a loss of momentum of the cleaning fluid during movement within the second chamber 2 such that there is a velocity difference between the cleaning fluid flowing out of the sample needle N and the cleaning fluid after the sidewall 3 has been diverted, thereby forming a vortex at the second sidewall 3 b. The flow rate q decreases when the cleaning liquid flows through the second side wall 3b, resulting in an increase in the pressure of the cleaning liquid, thereby facilitating cleaning of the outer wall of the sample needle N. At the same time, the second side wall 3b also limits to a certain extent the overflow of cleaning liquid from the second opening 2 a.
According to the cleaning pool 10 provided by the invention, the second chamber 2 with the tapered second side wall 3b is arranged in the cleaning part 11 of the first chamber 1, so that the cleaning liquid can form vortex in the second chamber 2, the cleaning effect of the sample needle N is improved, the standard requirement of carrying the pollution rate is met, and the cleaning pool is low in cost and convenient to maintain.
Referring again to fig. 3, as previously described, the second sidewall 3b tapers in a first direction X from the bottom surface 2b to the second opening 2a, wherein the second sidewall 3b forms a predetermined angle α with the first sidewall 3 a. Experiments prove that when the value range of the preset angle alpha is more than or equal to 5 degrees and less than or equal to 15 degrees, the overflow of the cleaning liquid from the second opening 2a can be effectively inhibited.
In addition, the second chamber 2 has a first depth dimension L1 in the first direction X, and the first sidewall 3a extends upwardly from the bottom surface 2b a predetermined distance L.ltoreq. 0.5L1. The bottom surface 2b of the second chamber 2 may be any one of a plane, a spherical surface, and a conical surface. Since the cleaning fluid will rebound upwards after impacting the bottom surface 2b, the spherical surface and the conical surface have guiding function, so that the velocity loss of the cleaning fluid is smaller than the velocity loss when the bottom surface 2b is planar.
When the bottom surface 2b is a spherical surface or a tapered surface, the distance h between the sample needle N and the bottom surface 2b refers to the minimum distance, i.e., the distance h between the sample needle N and the uppermost end of the spherical surface or the tapered surface.
The cross section of the second chamber 2 along the first direction X may be any one of a circular hole, an elliptical hole, and a bar-shaped hole. The cross section of the first chamber 1 along the first direction X may be a circular hole or an oval hole, and in the embodiment of the present invention, the cross sections of the first chamber 1 and the second chamber 2 along the first direction X are both circular holes.
Further, a rib 12 supporting the washing part 11 is further provided in the first chamber 1, and a receiving space capable of receiving the sample needle N is formed between the rib 12, the washing part 11, and the first chamber 1. The number of the reinforcing ribs 12 may be one or two or more, and the two or more reinforcing ribs 12 are circumferentially spaced apart along the wall portion of the first chamber 1. Preferably, the cleaning part 11 is located in the middle of the first chamber 1 so that the space between the wall of the first chamber 1 and the cleaning part 11 is equal in any direction, so that the inner wall of the sample needle N can be cleaned at any position of the space.
Referring to fig. 5, the cleaning portion 11 is provided with a plurality of overflow grooves 4 penetrating the second sidewall 3b at a position near the second opening 2a, and a second depth dimension L2 of the overflow grooves 4 along the first direction X is equal to or less than 0.5L1. Since the cleaning liquid generates a large hydraulic pressure during the formation of the vortex in the second chamber 2, the overflow tank 4 is provided to release the fluid pressure of the cleaning liquid, so that the cleaning liquid overflows from the overflow tank 4 and flows into the space between the wall of the first chamber 1 and the cleaning part 11, and finally is discharged from the outlet 1b to the drain 30.
When the number of the overflow grooves 4 is even, for example, 4, the overflow grooves 4 may be symmetrically arranged, and when the number of the overflow grooves 4 is odd, the overflow grooves may be uniformly distributed in the circumferential direction of the second opening 2a to balance the pressure of the cleaning liquid.
Referring to fig. 6 and fig. 7, a schematic cross-sectional view and a schematic top view of another cleaning tank according to an embodiment of the invention are shown. Since the cleaning liquid is inevitably splashed from the first opening of the cleaning bath 10 during the cleaning of the sample needle N, the reliability of the test instrument is affected. To this end, the wall portion of the first chamber 1 of the washing tub 10 provided in the embodiment of the present invention is further provided with one or more blocking pieces 13 located above the washing portion 11, the one or more blocking pieces 13 extending from the wall portion toward the inner space of the first chamber 1 to form a spiral ascending rotation passage toward the first opening 1a in the first chamber 1, and a receiving space for receiving the movement of the sample needle N along a predetermined trajectory in the first chamber 1. The predetermined trajectory refers to a trajectory in which the sample needle N reciprocates between a first position P1 between the wall of the first chamber 1 of the washing bath 10 and the washing section 11 and a second position P2 of the second chamber 2 of the washing section 11, as shown in fig. 6.
The spiral ascending rotating channel formed by the one or more baffle plates 13 can prevent the cleaning fluid from splashing out of the first opening 1a, and the residual cleaning fluid slowly flows down along the rotating channel under the action of self gravity without remaining on the baffle plates 13. The purpose of the spiral rising is to provide the baffle 13 with different slopes, so as to prevent the cleaning liquid from forming a bubble film in a certain plane, which is difficult to clean.
Preferably, the number of the baffle plates 13 is plural, each baffle plate 13 is inclined toward the first opening 1a, and the plurality of baffle plates 13 are spirally stepwise distributed in the circumferential direction of the first chamber 1 to form a rotation passage. The baffle 13 is inclined toward the first opening 1a, so that the blocked cleaning liquid flows along the surface of the inclined baffle 13 toward the wall of the first chamber 1 by the flow guiding action of the baffle 13, and the cleaning liquid is prevented from splashing onto the outer wall of the sample needle N.
The helix angle β of each baffle 13 is related to the inner diameter dimension of the first chamber 1, the larger the inner diameter, the larger the value of the helix angle β. Preferably, the value range of the helix angle β of each baffle 13 is: beta is more than or equal to 15 degrees and less than or equal to 25 degrees.
Further, the adjacent two of the barrier ribs 13 have a predetermined interval in the first direction X, and the smaller the predetermined interval is, the more easily the bubble film is formed to cover the barrier ribs 13, so that the predetermined interval in the first direction X of the adjacent two barrier ribs 13 should be increased as much as the structural size allows. In addition, the adjacent two baffle plates 13 are continuously distributed in the circumferential direction to form a 360-degree closed ring, so that the cleaning liquid can be prevented from overflowing in the circumferential direction.
Among the plurality of baffle plates 13, the baffle plate 13 near the first opening 1a along the first direction X and the baffle plate 13 far from the first opening 1a have a larger interval in the first direction X, so that the two baffle plates are partially overlapped in the circumferential direction in order to prevent the cleaning liquid from bouncing and splashing between the two baffle plates.
In addition, a side of each of the flaps 13 remote from the wall portion of the first chamber 1 is formed with an inwardly concave edge, and the edges of the flaps 13 form a predetermined accommodation space. The projection of the predetermined accommodation space on a plane perpendicular to the first direction X is a bar-shaped hole 14 or an elliptical hole 14, as shown in fig. 7. The smaller the predetermined accommodation space should be, the better the predetermined trajectory of the sample needle N is satisfied, to prevent the cleaning liquid from splashing out of the accommodation space as much as possible.
The cleaning tank 10 is typically manufactured by injection molding or other processes using a transparent plastic material such as acrylic or polycarbonate. In practical designs, one or more of the baffle plates 13 may be assembled on the wall of the first chamber 1 by means of clamping or bonding after the processing of the baffle plates 13 due to, for example, the limitation of the injection molding process.
As an alternative embodiment, one or more of the baffle 13 portions may be configured as a single unit and removably coupled to the basin 10. Since the blocking piece 13 and the wall portion of the first chamber 1 may have residual cleaning liquid, the assembly is detachably connected to the cleaning tank 10 so as to be cleaned or replaced at any time.
Thus, referring to fig. 9, a schematic diagram of another cleaning device according to an embodiment of the present invention is shown with the liquid supply device 20 and the liquid discharge device 30 removed. The cleaning device is similar in structure to the cleaning device shown in fig. 1, except that the cleaning device further includes an overflow preventing means 40 detachably covered on the first opening 1a of the cleaning tank 10. The overflow preventing means 40 has a receiving space for receiving the movement of the sample needle N along a predetermined trajectory, and serves to prevent the cleaning liquid from overflowing from the first opening 1a during the cleaning of the sample needle N.
Specifically, the overflow preventing means 40 includes: a body 41 and one or more flaps 42 provided in the body 41.
The body 41 is an annular structure having an inner hole 41c, and the inner hole 41c may be a circular hole or an elliptical hole, and the circular hole is exemplified as an embodiment of the present invention. The body portion 41 has opposite first and second ends 41a, 41b along the axial direction of the bore 41c, and the anti-overflow device is covered by the second end 41b against the first opening 1a of the washing tub 10.
One or more blocking pieces 42 extend from a wall portion of the inner hole 41c in a radial direction of the inner hole 41c to form a spirally rising rotation passage in the inner hole 41c, and a predetermined accommodation space is formed in the radial direction of the inner hole 41c to accommodate movement of the sample needle N along a predetermined trajectory. The predetermined trajectory refers to a trajectory in which the sample needle N reciprocates between a first position P1 between the wall of the first chamber 1 of the washing bath 10 and the washing section 11 and a second position P2 of the second chamber 2 of the washing section 11, as shown in fig. 9.
The spiral rising rotation channel formed by the one or more baffles 42 can block the overflow of the cleaning liquid from the first opening 1a and allow the residual cleaning liquid to slowly flow down the rotation channel under the action of self gravity without remaining on the baffles 42. The purpose of the spiral elevation is to provide the baffle plate 42 with different slopes, so that the cleaning liquid is prevented from forming a bubble film in a certain plane, which is difficult to clean.
The overflow preventing device 40 provided by the invention can prevent the cleaning liquid from overflowing from the cleaning pool of the cleaning device by arranging the baffle plate 42 capable of forming the spiral ascending rotating channel in the inner hole 41c of the body part 41, and has simple structure and easy realization.
The specific construction of the spill guard 40 is described in further detail below with reference to the accompanying drawings.
Referring to fig. 9 and 10 together, preferably, the number of the blocking pieces 42 is plural, each blocking piece 42 is inclined toward the first end 41a, and the blocking pieces 42 are spirally and stepwise distributed along the circumferential direction of the inner hole 41c to form a rotation channel. The baffle plate 42 is inclined toward the first end 41a in the axial direction, so that the blocked cleaning liquid flows along the surface of the inclined baffle plate 42 toward the wall of the inner hole 41c by the flow guiding action of the baffle plate 42, and the cleaning liquid is prevented from splashing onto the outer wall of the sample needle N.
The helix angle β of each flap 42 is related to the inner diameter dimension of the first chamber 1, the larger the inner diameter the larger the value of the helix angle β. Preferably, the value range of the helix angle β of each baffle 13 is: beta is more than or equal to 15 degrees and less than or equal to 25 degrees.
Further, the adjacent two of the flaps 42 have a predetermined interval in the axial direction, and the smaller the predetermined interval is, the more easily the bubble film is formed to cover the flaps 42, so that the predetermined interval in the axial direction of the adjacent two of the flaps 42 should be increased as much as the structural size allows. In addition, the adjacent two blocking pieces 42 are continuously distributed in the circumferential direction to form a 360-degree closed ring, so that the cleaning liquid can be prevented from overflowing in the circumferential direction.
Among the plurality of blocking pieces 42, the blocking piece 42 axially adjacent to the second end 41b and the blocking piece 42 axially adjacent to the first end 41a are spaced apart at a relatively large distance, so that the two blocking pieces are partially overlapped in the circumferential direction in order to prevent the cleaning liquid from bouncing and splashing between the two blocking pieces.
Specifically, the circumferential angle θ1 of the flaps 42 near the second end 41b among the flaps 42 along the inner hole satisfies formula (1), and the circumferential angles θ2 of the remaining flaps along the inner hole satisfy formula (2):
θ1>360/n (1)
θ2＝360/n (2)
where n is the number of the plurality of baffles 42.
Thus, when the cleaning liquid splashed from the cleaning reservoir 10 passes the stopper 42 near the second end 41b, the cleaning liquid passing the one end in the circumferential direction of the stopper 42 is caught by the adjacent stopper 42 and is returned to the cleaning reservoir 10, and the cleaning liquid passing the other end in the circumferential direction of the stopper 42 is returned directly to the cleaning reservoir 10.
Further, a concave edge is formed at a side of each of the blocking pieces 42 away from the inner hole 41c, and a predetermined accommodation space is formed at edges of the plurality of blocking pieces 42. The projection of the predetermined accommodation space on a plane perpendicular to the axial direction is a bar-shaped hole 45 or an elliptical hole 45. The predetermined accommodation space should be smaller and better in order to prevent the cleaning liquid from splashing out of the accommodation space as much as possible if the predetermined trajectory of the sample needle N is satisfied.
Referring to fig. 11, preferably, the number of the blocking pieces 42 is four, the predetermined accommodating space includes a second position P2 corresponding to the central axis of the inner hole 41c, one side of two adjacent blocking pieces 42 of the four blocking pieces 42 away from the inner hole 41c is respectively formed with a 1/4 circular arc edge 43 coaxial with the inner hole 41c and concave inwards, one side of the other two blocking pieces 42 away from the inner hole 41c is respectively formed with a special-shaped edge 44 composed of a straight line section and a concave 1/4 circular arc, and the two 1/4 circular arc edges 43 and the two special-shaped edges 44 together form a bar-shaped hole 45.
Referring to fig. 12, as an alternative embodiment, two adjacent baffle plates 42 of the four baffle plates 42 are respectively formed with a first arc edge 46 coaxial with the inner hole 41c and concave inwards on one side away from the inner hole 41c, and two other baffle plates 42 are respectively formed with a second arc edge 47 on one side away from the inner hole 41c, wherein the two first arc edges 46 and the two second arc edges 47 together form an elliptical hole 45.
It will be appreciated that the second position P2 of the predetermined trajectory of the sample needle N, i.e. the position of the cleaning portion 11, may also be located at other positions of the first chamber, such that the edges of the sides of the four flaps 42 of the anti-overflow device 40 facing away from the inner hole 41c have other shapes, respectively, and are not limited to the structure shown in fig. 9 or 10.
In addition, the second end 41b of the body portion 41 is provided with a groove 48 recessed in the axial direction, and the first opening 1a of the cleaning tank can extend into the groove 48, as shown in fig. 10.
As an alternative embodiment, the second end 41b of the body portion 41 is provided with a flange 48 projecting outwardly around the inner bore 41c, the flange 48 being capable of extending into the first opening of the washing tank.
Referring to fig. 13, an embodiment of the present invention further provides a sample needle cleaning method using any one of the cleaning devices described above, the sample needle cleaning method comprising the steps of:
step S1: the sample needle N is extended into the first position P1 between the wall of the first chamber 1 of the washing cell 10 and the washing section 11.
Step S2: supplying a cleaning liquid to the sample needle N, and allowing the cleaning liquid to flow out of the sample needle N to clean the inner wall of the sample needle N. The time for cleaning the inner wall of the sample needle N may be, for example, 1s.
Step S3: the sample needle N is moved from the first position P1 to the second position P2 of the second chamber 2 of the washing section 11.
Step S4: the cleaning liquid is supplied to the sample needle N so that the cleaning liquid flowing out from the sample needle N forms a vortex between the bottom surface 2b and the side wall 3 of the second chamber 2 to clean the outer wall of the sample needle N. Since the flow rate of the cleaning liquid is smaller than the flow rate of the cleaning liquid when the outer wall is cleaned, the time for cleaning the outer wall may be slightly longer than the time for cleaning the inner wall, for example, may be 3s.
The distance h between the second position P2 and the bottom surface 2b of the second chamber 2, the predetermined angle α between the second side wall 3b and the first side wall 3a, and the flow rate q of the liquid supply means 20 have an influence on the flow rate of the cleaning liquid, and the greater the flow rate, the better the cleaning effect of the sample needle N. The inner diameter of the sample needle N is generally 0.8 to 1.2mm, and the sample residue on the inner wall of the probe can be effectively cleaned under the condition of the actual flow rate q-type (3) of the sample needle N in consideration of the pressure load of the liquid path.
252mL/min＜q＜320mL/min (3)
Next, the influence of the height h of the sample needle N in the second chamber 2 of the washing reservoir 10 on the flow rate of the washing liquid is analyzed under the condition that the flow rate q of the liquid supply device 30 satisfies the requirement of the formula (3) at a predetermined angle α=8°.
Referring to fig. 14, 15 and 16 together, there are shown graphs of the flow rate of the cleaning liquid in the 3mm region at the end of the sample needle N at h=1 mm, 5mm and 7mm, respectively. It can be seen that the flow rate ranges from 1 to 2m/s at h=1 mm; the flow rate range is 1.5-2.0 m/s when h=5 mm, and the flow rate distribution is more uniform and the gradient of change is smaller compared with that when h=1; when h=7mm, the flow rate ranges from 0.02 to 0.5m/s, the flow rate is obviously reduced, and the cleaning effect is poor. Experiments prove that the range of the distance h between the second position P2 and the bottom surface 2b of the second chamber 2 is as follows: h is more than or equal to 3mm and less than or equal to 5mm. At this time, the flow rate range of the cleaning liquid is 1.5-2.0 m/s, and the flow rate q of the cleaning liquid meeting the flow rate can also meet the requirement of the formula (3).
Taking h=4mm as an example, a cleaning solution is supplied according to the above-mentioned requirement of the flow rate q, a high concentration sample and a zero concentration sample are used as samples, and the high concentration sample, the zero concentration sample, and the zero concentration sample are set in this order, and the measurement is performed on an analyzer, 5 sets of measurement are performed in total, and the carrying contamination rate K of each set is calculated according to the formula (4). The test data are shown in table 1.
In the formula (4), A 4 Measurement for sample 4 in each group; a is that 6 Measurement for sample 6 in each group; a is that Original source Is a high concentration sample.
The test data are shown in Table 1, and the test data in Table 1 show that the carrying pollution rate is less than 10ppm, and the test requirement of the medicine industry standard YY/T1155-2009 full-automatic luminous immunoassay instrument on the carrying pollution rate is less than or equal to 10ppm is met.
Table 1 carries pollution rate test data (carried pollution rate unit: ppm)
The sample needle cleaning method provided by the embodiment of the invention adopts the cleaning device, improves the cleaning effect of the sample needle N, ensures that the sample needle N meets the standard requirement of the carrying pollution rate, and has low cost and convenient maintenance.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. An anti-overflow device for a cleaning device for cleaning a sample needle, the anti-overflow device comprising:
the body part is an annular structure body with an inner hole, and the body part is provided with a first end and a second end which are opposite along the axial direction of the inner hole;
the baffle plates extend from the wall part of the inner hole along the radial direction of the inner hole, form a spiral ascending rotating channel facing the first end in the inner hole, and form a preset accommodating space for extending in one end of the sample needle in a surrounding manner in the radial direction of the inner hole.
2. The spill guard of claim 1, wherein each of said flaps is inclined toward said first end, a plurality of said flaps being helically stepped along a circumference of said bore to form said rotational passage.
3. The spill guard of claim 2, wherein the range of values of the angle of elevation β of each of the flaps is: beta is more than or equal to 15 degrees and less than or equal to 25 degrees.
4. The overflow preventing device as claimed in claim 3, wherein two adjacent flaps have a predetermined interval in the axial direction and are continuously distributed in the circumferential direction, and the flaps adjacent to the second end in the axial direction among the plurality of flaps partially overlap with the flaps adjacent to the first end in the circumferential direction.
5. The spill guard of claim 4, wherein a circumferential angle θ1 of the flaps adjacent the second end of the plurality of flaps along the bore satisfies equation (1), and a circumferential angle θ2 of the remaining flaps along the bore satisfies equation (2):
θ1>360/n (1)
θ2＝360/n (2)
wherein n is the number of the baffle plates.
6. The spill guard of claim 2, wherein each of said flaps defines a concave edge on a side thereof remote from said internal bore, said edges of a plurality of said flaps defining said predetermined receiving space.
7. The overflow preventing device of claim 6, wherein the projection of the predetermined receiving space on a plane perpendicular to the axial direction is a bar-shaped hole or an oval-shaped hole.
8. The overflow preventing device of claim 7, wherein the number of the baffle plates is four, the predetermined accommodating space comprises a second position corresponding to the central axis of the inner hole, one side, away from the inner hole, of each adjacent baffle plate is provided with a 1/4 circular arc edge which is coaxial with the inner hole and concave inwards, the other two sides, away from the inner hole, of each baffle plate are provided with a special-shaped edge which consists of a straight line section and a concave 1/4 circular arc, and the two 1/4 circular arc edges and the two special-shaped edges form the strip-shaped hole together.
9. The overflow preventing device of claim 7, wherein the number of the baffle plates is four, the predetermined accommodating space comprises a second position corresponding to the central axis of the inner hole, two adjacent baffle plates in the four baffle plates are respectively provided with a first arc edge which is coaxial with the inner hole and concave inwards on one side away from the inner hole, the other two baffle plates are respectively provided with a second arc edge on one side away from the inner hole, and the two first arc edges and the two second arc edges jointly form the oval hole.
10. The overflow preventing device of claim 1, wherein the second end of the body portion is provided with a flange projecting outwardly around the bore, the flange being capable of extending into the opening of the cleaning tank;
alternatively, the second end of the body portion may be provided with a recess recessed in the axial direction, and the opening of the cleaning tank may extend into the recess.
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| CN201811102518.0A CN109201641B (en) | 2018-09-20 | 2018-09-20 | Anti-overflow device for cleaning device |
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| CN109201641B true CN109201641B (en) | 2024-03-15 |
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|---|---|
| CN109201641A (en) | 2019-01-15 |
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