CN110954366B - Sampling device - Google Patents
Sampling device Download PDFInfo
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- CN110954366B CN110954366B CN201911360453.4A CN201911360453A CN110954366B CN 110954366 B CN110954366 B CN 110954366B CN 201911360453 A CN201911360453 A CN 201911360453A CN 110954366 B CN110954366 B CN 110954366B
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- inner tube
- outer tube
- cambered surface
- tube
- main body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention provides a sampling device, which comprises an inner tube, a sampling device and a sampling device, wherein the inner tube is provided with an inner tube closed end, an inner tube open end and a longitudinally extending inner tube body; an outer tube having an outer tube closed end, an outer tube open end, and a longitudinally extending outer tube body, the outer tube body housing an inner tube; the cover body comprises a cover main body and a sealing bolt connected with the bottom end of the cover main body; an annular groove is formed at the joint of the cover main body and the sealing bolt, and an outwards extending cambered surface which is contacted with the outer side wall of the opening end of the outer tube is arranged on the outer side wall of the annular groove. According to the invention, the cambered surface contacted with the outer tube is arranged at the annular groove of the cover body, so that the contact force between the cover body and the tube body is uniformly dispersed on the cambered surface when the cover body is separated outwards, and the stress generated in the cover body is reduced; the cover body can be opened outwards only by slightly exerting force, so that liquid in the inner pipe is prevented from shaking and splashing.
Description
Technical Field
The invention relates to a sampling device, which is particularly suitable for collecting urine and belongs to the technical field of medical treatment.
Background
The urine needs to be collected during urine examination, but most of urine collection devices adopted at the present stage are simple urine sample collection cups, urine is directly received in the collection cups and then poured into test tubes by delivery staff, so that a plurality of problems exist in the process, such as the problem that the urine is not convenient enough and is easy to splash to the outer sides of the collection cups during collection, and sanitation is affected; the collection cup tends to contaminate the surrounding environment during urine collection into the test tube and is also inconvenient when transferred to the test tube.
CN1276868A discloses a urine collection container comprising an elongated tubular container body having one end closed and the other end open; a urine collection port formed in a central portion of the container body; a cover cylinder which is formed in an elongated cylindrical shape having one end closed and the other end opened, and has a diameter slightly larger than that of the container body so as to be capable of freely inserting and extracting the container body, and which is used for closing the urine collection port; a cover detachably formed at an opening end of the container body to open and close the opening end of the container body; when the container body is inserted into the cap to the inserted position, the contact sound between the cap and the cap is generated, and as a result, the fully inserted state of the container body can be easily determined. When the collected urine is required to be operated, the sealing component is extruded by the injection rod or the urine collection rod, and the sealing component is broken along the breaking groove to form an opening. When the inner tube is filled with liquid, the surface of the inner wall of the cover body, which is in contact with the outer wall of the upper end of the outer wall of the cover cylinder, is an inclined surface, so that a large force is needed to be applied when the cover is taken down, and not only is a large stress generated on the inner wall of the cover, but also the liquid in the inner tube can be splashed.
Disclosure of Invention
In order to solve the problems, the invention provides the sampling device, and the cambered surface extending outwards is arranged at the annular groove of the cover body, so that the contact force between the cover body and the pipe body is uniformly dispersed on the cambered surface, the stress generated in the cover body is reduced, and the cover body can be broken outwards only by slightly exerting force.
The technical scheme adopted by the invention is as follows:
a sampling device, the device comprising:
the inner tube is provided with an inner tube closed end, an inner tube open end and a longitudinally extending inner tube body, and a sampling port is formed in one side of the inner tube body;
an outer tube having an outer tube closed end, an outer tube open end, and a longitudinally extending outer tube body, the outer tube body housing an inner tube;
the cover body comprises a cover main body and a sealing bolt connected with the bottom end of the cover main body; an annular groove is formed at the joint of the cover main body and the sealing bolt, and an outwards extending cambered surface which is contacted with the outer wall of the opening end of the outer tube is arranged on the outer side wall of the annular groove.
Preferably, the cambered surface comprises a first cambered surface and a second cambered surface, and the included angle between the tangent line of the first cambered surface and the axis of the cover main body is larger than the included angle between the tangent line of the second cambered surface and the axis of the cover main body.
Preferably, the cambered surface comprises a first cambered surface and a second cambered surface which are sequentially connected, the included angle between the tangent line of the first cambered surface and the axis of the cover main body is 20-30 degrees, and the arc length is 1-2 mm; the included angle between the tangent line of the second cambered surface and the axis of the cover main body is 5-15 degrees, and the arc length is 1-2 mm.
Preferably, the cambered surface comprises a first cambered surface, a conical surface and a second cambered surface which are sequentially connected, the included angle between the tangent line of the first cambered surface and the axis of the cover main body is 20-30 degrees, and the arc length is 2-4 mm; the included angle between the conical surface and the axis of the cover main body is 15-20 degrees, and the length is 1-2 mm; the included angle between the tangent line of the second cambered surface and the axis of the cover main body is 5-15 degrees, and the arc length is 1-2 mm.
Preferably, the side wall of the outer tube corresponding to the cambered surface is a straight surface.
Preferably, a first end face contacting with the end wall of the opening end of the inner tube and a second end face contacting with the end wall of the opening end of the outer tube are formed on the top wall of the annular groove, and the depth of the first end face is smaller than that of the second end face.
Preferably, the outer diameter of the sealing bolt is equal to the inner diameter of the opening end of the inner tube, and the outer diameter of the sealing bolt is smaller than the diameter of the cover main body.
Preferably, the inner side wall at the upper end of the inner tube is provided with a convex part, the convex part has a height gradually decreasing along the lower end, and the sealing bolt is provided with a groove corresponding to the convex part.
Preferably, the upper peripheral surface of the cover main body is provided with a plurality of arc ribs extending longitudinally; the height of the arc-shaped edges is 0.5-1 mm, and the distance between the adjacent arc-shaped edges is 1-2 mm.
Preferably, a plurality of supporting ribs are axially arranged on the inner side wall of the closed end of the outer tube, and the supporting ribs are provided with side surfaces corresponding to the closed end of the inner tube.
Preferably, the sampling port is arranged at the middle part of the inner tube, and the inner tube is closed at one side opposite to the sampling port.
The beneficial effects of the invention are as follows:
(1) According to the invention, the cambered surface contacted with the outer tube is arranged at the annular groove of the cover body, so that the contact force between the cover body and the tube body is uniformly dispersed on the cambered surface when the cover body is separated outwards, and the stress generated in the cover body is reduced; the included angle between the first cambered surface tangent line and the axis of the cover main body is larger than the included angle between the second cambered surface tangent line and the axis of the cover main body, when the cover body is taken down outwards, the first cambered surface and the second cambered surface have adaptation and buffering to uneven lateral force, so that the stress in the cover body is greatly reduced; the cover body can be opened outwards only by slightly exerting force, so that liquid in the inner pipe is prevented from shaking and splashing.
(2) The invention also provides a plurality of supporting ribs axially arranged on the inner side wall of the closed end of the outer tube and used for supporting the closed end of the inner tube, so that the closed end of the inner tube is prevented from being directly contacted with the closed end of the outer tube, and the separation of the inner tube and the outer tube is facilitated and the repeated use is facilitated.
(3) The device has the advantages of convenient operation, simple structure and strong practicability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of a cover of a sampling device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a cover of a sampling device according to another embodiment of the present invention;
FIG. 3 is a schematic view of the structure of an inner tube in the sampling device of the present invention;
FIG. 4 is a schematic view of the structure of an outer tube in the sampling device of the present invention;
FIG. 5 is a schematic diagram showing a use state of the sampling device according to the present invention;
FIG. 6 is a schematic diagram of another use state of the sampling device according to the present invention;
fig. 7 is a top view of an outer tube of a sampling device according to an embodiment of the present invention.
FIG. 8 is a front view of a cover of a sampling device according to an embodiment of the present invention;
wherein, 1, an inner tube; 11. a sampling port; 12. a first inner tube bump; 13. a second inner tube bump; 14. a convex portion; 2. an outer tube; 21. support the arris; 211. a side surface; 22. a first outer tube bump; 23. a second outer tube bump; 3. a cover body; 31. a cover main body; 311. arc-shaped edges; 32. a sealing bolt; 33. an annular groove; 331. a first cambered surface; 332. a second cambered surface; 333. a conical surface; 334. a first end face; 335. a second end face; 336. a groove.
Detailed Description
The present invention is described in detail below with reference to examples, but the present invention is not limited to these examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
In addition, in the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly attached, detachably attached, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1 to 6, a sampling device of the present invention includes: the inner tube 1 is provided with an inner tube closed end, an inner tube open end and a longitudinally extending inner tube body, one side of the inner tube body is provided with a sampling port 11, and the sampling port 11 is used for collecting samples; the outer tube 2 is provided with an outer tube closed end, an outer tube open end and a longitudinally extending outer tube body, the inner tube 1 is accommodated in the outer tube body, the inner diameter of the outer tube 2 is slightly larger than the outer diameter of the inner tube 1, and after the inner tube 1 collects a sample, the outer tube 2 is used for sealing an inner tube sampling port; the cover body 3 comprises a cover main body 31 and a sealing bolt 32 connected with the bottom end of the cover main body 31; an annular groove 33 is formed at the junction of the cap body 31 and the seal bolt 32, and an outwardly extending cambered surface contacting with the outer wall of the open end of the outer tube is formed on the outer side wall of the annular groove 33.
When the device is used, firstly, a sample is collected through the sampling port 11 of the inner tube 1; after the inner tube 1 is inserted into the outer tube 2, the outer tube 2 closes the sampling port 11, the cover 3 preferably covers the open end of the inner tube before sampling, and after the outer tube 2 closes the sampling port 11, the open end of the outer tube is also closed by the cover 3. In the assembled state, the closed end of the outer tube and the closed end of the inner tube face downwards, when a collected sample needs to be detected or analyzed, the cover body 3 needs to be taken down, and the stress in the cover body is evenly dispersed when the cover body is broken off outwards due to the arc-shaped surface of the annular groove 33 of the cover body 3, so that the stress in the cover body is reduced; and the cover body can be broken off and taken down only by slightly exerting force, so that liquid in the inner pipe is prevented from shaking and splashing due to overlarge force.
In a preferred embodiment, the cambered surfaces include a first cambered surface 331 and a second cambered surface 332, and an included angle between a tangent line of the first cambered surface 331 and the axis of the cover main body 31 is larger than an included angle between a tangent line of the second cambered surface 332 and the axis of the cover main body 31. When the cover 31 is removed to the outside, the outer pipe body sequentially passes through the first arc surface 331 and the second arc surface 332 at the annular groove 33, and because of uneven side force generated outside the annular groove of the cover, the force is larger from beginning to end and smaller from the beginning. Therefore, the included angle between the tangent line of the first arc surface 331 and the axis of the cover main body 31 is set to be larger than the included angle between the tangent line of the second arc surface 332 and the axis of the cover main body 31, and a buffer surface is adapted to the applied lateral force, so that the stress in the cover body 3 is reduced.
In a preferred embodiment, as shown in fig. 1, the cambered surface comprises a first cambered surface 331 and a second cambered surface 332 which are sequentially connected, the included angle between the tangent line of the first cambered surface 331 and the axis of the cover main body 31 is 20-30 degrees, and the arc length is 2-4 mm; the angle between the tangent line of the second cambered surface 332 and the axis of the cover main body 31 is 5-15 degrees, and the arc length is 1-2 mm. The included angle between the arc tangent line and the axis of the cover main body and the arc length determine the size of the buffer surface for external force, when the angle between the first arc 331 and the second arc 332 and the arc length are too small, the stress in the cover body is concentrated when external force is applied; when the first cambered surface, the second cambered surface, the first cambered surface, the second cambered surface and the arc length are too large, a large external force is required to be used, and the stress in the cover body is not reduced.
In a preferred embodiment, as shown in fig. 2, the cambered surface comprises a first cambered surface 331, a conical surface 333 and a second cambered surface 332 which are sequentially connected, wherein an included angle between a tangent line of the first cambered surface 331 and the axis of the cover main body 31 is 20-30 degrees, and the arc length is 2-4 mm; the included angle between the conical surface 333 and the axis of the cover main body 31 is 15-20 degrees, and the length is 1-2 mm; the angle between the tangent line of the second cambered surface 332 and the axis of the cover main body 31 is 5-15 degrees, and the arc length is 1-2 mm. The first cambered surface 331 and the second cambered surface 332 are connected through the conical surface 333, so that external force is dispersed more, and the elimination of internal stress of the cover body 3 is facilitated.
In a specific embodiment, as shown in fig. 4 and 6, the side wall of the outer tube 2 corresponding to the cambered surface is a straight surface. The outer tube 2 is of a tubular structure, and when the outer tube 2 is inserted into the cover body 3, the straight side wall of the outer tube 2 is contacted with the cambered surface of the cover body cambered groove; when the cover body 3 needs to be taken down, the cover body 3 generates lateral force on the outer tube 2, and the cambered surface is beneficial to reducing the pressure on the straight side wall of the outer tube 2.
In one embodiment, as shown in fig. 1 and 6, a first end surface 334 contacting the end wall of the opening end of the inner tube and a second end surface 335 contacting the end wall of the opening end of the outer tube are formed on the top wall of the annular groove 33, and the depth of the first end surface 334 is smaller than the depth 335 of the second end surface. Since the inner tube 1 is completely accommodated in the outer tube 2, the open end of the outer tube slightly protrudes from the open end of the inner tube, and when sealed with the cover 3, the depth or height of the first end face 334 contacting the open end wall of the inner tube and the depth or height of the second end face 335 contacting the open end wall of the outer tube are set to be different, and the depth of the first end face 334 is smaller than the depth of the second end face 335.
In a preferred embodiment, as shown in fig. 5 and 6, the outside diameter of the sealing plug 32 is equal to the inside diameter of the opening end of the inner tube, and the outside diameter of the sealing plug 32 is smaller than the diameter of the cap body 31. The sealing plug 32 is used for being inserted into the open end of the inner tube to seal the open end of the inner tube, and ensures that the sample in the inner tube 1 cannot flow out or seep out from the open end during sampling, sample transferring or transporting and the like of the sampling port 11.
In a preferred embodiment, as shown in fig. 1, 3, 5 to 6, the inner sidewall of the upper end of the inner tube 1 is provided with a protrusion 14, the protrusion 14 has a height gradually decreasing along the lower end, and the sealing plug 32 has a groove 336 corresponding to the protrusion. When the cover body 3 is broken off to the outside, the cover body 3 needs to be separated from the opening ends of the inner tube 1 and the outer tube 2 at the same time, the inner side wall of the inner tube 1 is provided with a convex part which gradually reduces along the lower end, and after the lateral force is applied, the cover body 3 can be separated from the inner tube 1 only by using a small force.
In a preferred embodiment, as shown in fig. 8, the upper outer circumferential surface of the cover main body 31 is provided with a plurality of longitudinally extending arc-shaped ribs 311; the height of the arc-shaped ribs 311 is 0.5-1 mm, and the distance between adjacent arc-shaped ribs 311 is 1-2 mm. When the user removes the cover, the user holds the outer peripheral wall of the cover main body 31 with the hand, and the arc-shaped ribs 311 are arranged, so that friction is increased, and the user cannot easily slide when holding the cover 3 with the hand. The height and distance of the arc-shaped ribs 311 are set, so that a user can hold the cover body conveniently, and the comfort of the user is improved.
In a preferred embodiment, the sampling port 11 is formed at a middle position of the inner tube 1, and the inner tube 1 is closed at a side opposite to the sampling port 11. The sampling port 11 has an axial opening, and the rear end surface of the opening has a slope rising toward the open end of the inner tube. The shape sampling port 11 is convenient to sample, and after being sealed by the outer 2 pipes, the sample in the liquid is not easy to flow out.
In a preferred embodiment, as shown in fig. 8, a plurality of supporting ribs 21 are axially provided on the inner side wall of the closed end of the outer tube for supporting the closed end of the inner tube. The arrangement of the supporting ribs avoids the direct contact between the closed end of the inner tube and the closed end of the outer tube, thereby facilitating the separation of the outer tube 2 and the inner tube 1. The support ribs are symmetrically arranged on the inner side wall of the closed end of the outer 2 pipe at intervals.
In this assembled state, the closed end of the outer tube and the closed end of the inner tube are used to the lower side, the cover body 31 is held by a hand, sampling is performed through the sampling port of the inner tube 1, and after the sampling is completed, the outer tube 3 is inserted, and the end wall of the open end of the outer tube is connected with the cover body. After the device is transferred, the sample needs to be taken out from the opening end or the sampling port 11 for subsequent detection and analysis, and when the sample is taken out from the sampling port 11, the outer tube 2 needs to be drawn out and separated from the inner tube 1. Or after the sampling analysis is finished, the outer tube 2 is also required to be drawn out and separated from the inner tube 1, so that the inner tube 1 and the outer tube 2 are respectively cleaned, and the repeated use is convenient. When detecting and analyzing a sample, the urine or a urine mixed sample in the inner tube 1 is required to be stirred, and the support rib 21 at the closed end of the outer tube effectively avoids the inner tube 1 from moving downwards along the outer tube 2 under the condition of external force and directly contacting with the closed end of the outer tube 2; it is convenient to withdraw the outer tube 2 to separate from the inner tube 1, thereby cleaning the inner tube 1 and the outer tube 2 and reusing it.
And a plurality of support ribs 21 are arranged at intervals, so that a certain gap is reserved between the closed end of the outer tube and the closed end of the inner tube, the outer tube 2 is conveniently pulled out to be separated from the inner tube 1, and the processing cost is saved. In order to ensure the uniformity of the stress of the closed end of the inner tube, the support ribs 21 are symmetrically arranged on the closed end of the outer tube, so that the stress of the closed end of the inner tube is uniform, the influence of the stress on the detection of liquid in a sample is reduced, and the accuracy of an experimental result is ensured. Preferably, the number of the supporting ribs 21 is 3 to 5, but not limited to 3 to 5, and may be more, so long as the processing is convenient, and the basic performance is not affected. More preferably, the number of the supporting ribs 21 is 4, and the symmetrical center of the stress point of the closed end of the inner tube is at the middle position, so that the closed end of the inner tube is supported more stably.
In one embodiment, as shown in fig. 3 to 6, a first inner tube protrusion 12 and a second inner tube protrusion 13 are provided on the outer circumferential surface of the inner tube 1; the first inner tube bump 12 is formed at the upper end of the sampling port 11, the second inner tube bump 13 is formed at the lower end of the sampling port 11, and the first inner tube bump 12 and the second inner tube bump 13 are both belt-shaped bumps. A first outer tube convex block 22 and a second outer tube convex block 23 are arranged on the inner peripheral surface of the outer tube 2, the first outer tube convex block 22 is locked with the first inner tube convex block 12, and the second outer tube convex block 23 is locked with the second inner tube convex block 13; the first outer tube bump 22 and the second outer tube bump 23 are both belt-shaped bumps. When the outer tube 2 is inserted into the inner tube 1, the first outer tube projection 22 passes through the second inner tube projection 13, so that the first inner tube projection 12 is locked with the first outer tube projection 22, and the second outer tube projection 13 is locked with the second inner tube projection 23.
In one embodiment, the inner tube 1 is made of a transparent material such as synthetic resin, and the outer tube 2 is made of a transparent material such as synthetic resin or translucent. The inner tube 1 is transparent, so that the liquid in the inner tube 1 can be conveniently observed.
The sampling device can be used for collecting urine, but is not limited to collecting urine, and can also be used for collecting liquid such as waste water, cell sap and the like or semisolid samples such as excrement and the like.
The invention can be realized by adopting or referring to the prior art at the places which are not described in the invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The present invention provides a sampling device as described above, which is only an example of the present invention, and the scope of the present invention is not limited by the specific examples, but is defined by the claims of the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A sampling device, the device comprising:
the inner tube is provided with an inner tube closed end, an inner tube open end and a longitudinally extending inner tube body, and a sampling port is formed in one side of the inner tube body;
an outer tube having an outer tube closed end, an outer tube open end, and a longitudinally extending outer tube body, the outer tube body housing an inner tube;
the cover body comprises a cover main body and a sealing bolt connected with the bottom end of the cover main body; an annular groove is formed at the joint of the cover main body and the sealing bolt, and the outer side wall of the annular groove is provided with an outwards extending cambered surface which is contacted with the side wall of the opening end of the outer tube;
the cambered surface comprises a first cambered surface and a second cambered surface which are sequentially connected, wherein the included angle between the tangent line of the first cambered surface and the axis of the cover main body is larger than the included angle between the tangent line of the second cambered surface and the axis of the cover main body, the included angle between the tangent line of the first cambered surface and the axis of the cover main body is 20-30 degrees, and the arc length is 2-4 mm; the included angle between the tangent line of the second cambered surface and the axis of the cover main body is 5-15 degrees, and the arc length is 1-2 mm;
the inner side wall of the upper end of the inner pipe is provided with a convex part, the convex part is provided with a height gradually reduced along the lower end, and the sealing bolt is provided with a groove corresponding to the convex part;
the upper peripheral surface of the cover main body is provided with a plurality of longitudinally extending arc-shaped ribs, the height of each arc-shaped rib is 0.5-1 mm, and the distance between adjacent arc-shaped ribs is 1-2 mm;
the sampling port is provided with an axial opening, and the rear end surface of the opening is provided with an inclined surface rising towards the opening end of the inner pipe;
the inner side wall of the closed end of the outer tube is axially provided with a plurality of supporting ribs, the supporting ribs are provided with side surfaces corresponding to the closed end of the inner tube, the supporting ribs are symmetrically arranged on the inner side wall of the closed end of the outer tube at intervals, the number of the supporting ribs is 4, the closed end of the inner tube is an arc surface, and the symmetry center of a stress point of the closed end of the inner tube is at the middle position;
the outer peripheral surface of the inner tube is provided with a first inner tube lug and a second inner tube lug, the first inner tube lug is formed at the upper end of the sampling port, the second inner tube lug is formed at the lower end of the sampling port, the first inner tube lug and the second inner tube lug are both strip-shaped lugs, the inner peripheral surface of the outer tube is provided with a first outer tube lug and a second outer tube lug, the first outer tube lug is locked with the first inner tube lug, the second outer tube lug is locked with the second inner tube lug, and the first outer tube lug is strip-shaped lugs with the second outer tube lug.
2. The sampling device of claim 1, wherein the cambered surface comprises a first cambered surface, a conical surface and a second cambered surface which are sequentially connected, the included angle between the conical surface and the axis of the cover main body is 15-20 degrees, and the length is 1-2 mm.
3. The sampling device of claim 1, wherein the side wall of the outer tube corresponding to the arcuate surface is a straight surface.
4. The sampling device of claim 1, wherein a first end face contacting the end wall of the open end of the inner tube and a second end face contacting the end wall of the open end of the outer tube are formed on the top wall of the annular groove, and the depth of the first end face is smaller than the depth of the second end face.
5. The sampling device of claim 1, wherein the sealing plug has an outer diameter equal to an inner diameter of the open end of the inner tube, the sealing plug having an outer diameter less than a diameter of the cap body.
6. The sampling device of claim 1, wherein the sampling port is formed in a central portion of the inner tube, and the inner tube is closed on an opposite side of the sampling port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911360453.4A CN110954366B (en) | 2019-12-25 | 2019-12-25 | Sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911360453.4A CN110954366B (en) | 2019-12-25 | 2019-12-25 | Sampling device |
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| Publication Number | Publication Date |
|---|---|
| CN110954366A CN110954366A (en) | 2020-04-03 |
| CN110954366B true CN110954366B (en) | 2023-09-01 |
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| CN201911360453.4A Active CN110954366B (en) | 2019-12-25 | 2019-12-25 | Sampling device |
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