CN214810979U

CN214810979U - Combined platinum crucible for analyzing uranium content of air filter membrane

Info

Publication number: CN214810979U
Application number: CN202121244639.6U
Authority: CN
Inventors: 孔淮
Original assignee: Research Institute of Physical and Chemical Engineering of Nuclear Industry
Current assignee: Research Institute of Physical and Chemical Engineering of Nuclear Industry
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-11-23
Anticipated expiration: 2031-06-04

Abstract

The utility model discloses a combined platinum crucible for analyzing the uranium content of an air filter membrane, which comprises a platinum crucible, wherein the bottom of the platinum crucible is a plane, and a support frame is sleeved outside the platinum crucible; the support frame comprises a hollow main body, the taper of the inner wall of the main body is the same as that of the outer wall of the platinum crucible, and the inner wall of the main body is attached to the outer wall of the platinum crucible. The utility model provides a combination platinum crucible that uranium content used in laser fluorescence method analytical determination air filter membrane, this crucible can neither receive external force influence and warp when using, can place steadily on the laboratory bench isoplane again, and have the antifouling nature of certain degree.

Description

Combined platinum crucible for analyzing uranium content of air filter membrane

Technical Field

The utility model belongs to chemical analysis equipment field, concretely relates to air filter membrane uranium content analysis is with combination platinum crucible.

Background

The platinum crucible is an indispensable container for analyzing the uranium content in the air filter membrane by using a laser fluorescence method in a standard method HJ 840-2017, after a sample filter membrane is placed in the platinum crucible and is burnt at 700 ℃ for 1 hour according to the standard method, crucible tongs are required to be used for clamping the sample filter membrane out of a muffle furnace, the platinum crucible is soft in texture, the platinum crucible is deformed if too much force is applied in the clamping process, the use is influenced, and the clamping force is too light, so that the platinum crucible is easy to fall off and the sample is lost.

In addition, the volume of the platinum crucible used for analyzing the uranium content in the air filter membrane is 25mL, the mass is about 25g, the weight of the air filter membrane burnt at high temperature can be basically ignored and is not recorded, so the total mass is lighter, and the bottom surface of the crucible has slight radian and is not completely attached to a table top, so the platinum crucible is easily influenced by the outside and topples over when being independently placed on a laboratory bench, and a sample is spilled to influence an analysis result.

SUMMERY OF THE UTILITY MODEL

The utility model provides a overcome the shortcoming that exists among the prior art and propose, its purpose provides an air filter membrane uranium content analysis is with combination platinum crucible.

The utility model discloses a realize through following technical scheme:

a combined platinum crucible for analyzing the uranium content of an air filter membrane comprises a platinum crucible, wherein the bottom of the platinum crucible is a plane, and a support frame is sleeved outside the platinum crucible; the support frame includes hollow main part, and the tapering of main part inner wall is the same with the tapering of platinum crucible outer wall, and main part inner wall pastes with platinum crucible outer wall.

In the technical scheme, a pouring opening is formed at the upper edge of the platinum crucible.

In the technical scheme, the main body is of a round table structure with a wide upper part and a narrow lower part, and the top bottom surface of the main body and the top bottom surface of the platinum crucible are positioned on the same horizontal plane.

In the above technical scheme, the support frame further comprises support legs arranged at the middle lower part of the main body, and the support legs are of hollow round table type structures with narrow tops and wide bottoms.

In the technical scheme, the vertical distance between the joint of the support leg and the main body and the bottom surface of the main body is one third of the height of the main body, the bottom surface of the support leg and the bottom surface of the main body are in the same horizontal plane, and the included angle alpha between a bus of the outer wall of the support leg and the horizontal line is 60 degrees.

In the above technical scheme, the annular clamping groove is formed in the outer wall of the main body, the clamping groove is arranged above the connection position of the supporting leg and the main body, and the bottom of the groove is an arc surface.

In the above technical scheme, the upper edge of the main body forms a gap.

In the technical scheme, the device also comprises a top cover buckled at the top of the support frame, and the top cover, the platinum crucible and the support frame are coaxially arranged; the top cover comprises a cover plate and a convex edge formed on the edge of the bottom surface of the top cover.

In the technical scheme, the top of the cover plate is provided with a clamping handle.

In the above technical scheme, the support frame and the top cover are made of ceramic materials.

The utility model has the advantages that:

the utility model provides a combination platinum crucible that high temperature firing air filter membrane used in environmental air uranium content analysis laser fluorescence method, neither can receive external force influence and warp when this crucible uses, can place steadily on the equiplanar of laboratory bench again, and have the antifouling nature of certain degree. When the crucible tongs are used for clamping the device, the device can be clamped at the clamping groove of the ceramic support frame, so that the clamping is more stable and is not easy to slip and overturn while the inner core of the platinum crucible is not deformed, and the top end of the platinum crucible is provided with an overturning port, so that a liquid sample is easier to topple; the ceramic support frame can resist high temperature of 1200 ℃, is suitable for heating in a muffle furnace in a standard method, and can be completely contacted with an electric heating plate at the bottom of a platinum crucible when the electric heating plate is used for heating, so that the heating efficiency is not influenced; the matched ceramic top cover is added, so that dust or other substances can be prevented from falling into the sample.

Drawings

FIG. 1 is a schematic structural view of a combined platinum crucible for uranium content analysis of an air filtration membrane of the present invention (a top cover is not shown);

FIG. 2 is a cross-sectional view of the platinum crucible for analyzing uranium content in an air filtration membrane of the present invention (the top cover is not shown);

FIG. 3 is a cross-sectional view of the top cover of the combined platinum crucible for analyzing the uranium content in the air filtration membrane of the utility model.

Wherein:

1 platinum crucible

11 pouring spout

2 support frame

21 main body 22 support leg

23 slot 24 opening

3 Top cover

31 cover plate 32 convex edge

33 grip the handle.

For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the combined platinum crucible for uranium content analysis of air filtration membrane of the present invention is further described below by referring to the drawings of the specification and the specific embodiments.

As shown in fig. 1 to 3, a combined platinum crucible for analyzing uranium content of an air filter membrane comprises a platinum crucible 1 and a support frame 2 sleeved outside the platinum crucible;

the support frame 2 comprises a hollow main body 21, and the top bottom surface of the main body 21 and the top bottom surface of the platinum crucible 1 are positioned on the same horizontal plane; the taper of the inner wall of the main body 21 is the same as that of the outer wall of the platinum crucible 1, and the inner wall of the main body 21 is attached to the outer wall of the platinum crucible 1, namely, the main body and the outer wall are not in clearance and are not bonded, so that the inner layer and the outer layer can be separated and respectively cleaned.

The main body 21 and the platinum crucible 1 are both of a circular truncated cone structure with a wide upper part and a narrow lower part.

In the present embodiment, in order to improve the stability of the main body 21 of the support frame 2, the support frame 2 further includes a support leg 22 disposed at the middle lower portion of the main body 21, and the support leg 22 is a hollow truncated cone structure with a narrow top and a wide bottom. The vertical distance between the junction of the support leg 22 and the main body 21 and the bottom surface of the main body 21 is one third of the height of the main body 21, the bottom surface of the support leg 22 and the bottom surface of the main body 21 are in the same horizontal plane, and the included angle alpha between the generatrix of the outer wall of the support leg 22 and the horizontal line is 60 degrees. Further, in order to improve the stability of the main body 21 and increase the friction between the bottom surface and the table top, the bottom of the main body 21 is sanded on the portion contacting the table top.

In this embodiment, in order to ensure that the platinum crucible is clamped by the crucible tongs more stably and not to fall off the whole crucible, the outer wall of the main body 21 forms an annular clamping groove 23, the clamping groove 23 is arranged above the joint of the supporting leg 22 and the main body 21, and the bottom of the groove is an arc surface.

In the embodiment, in order to pour liquid conveniently, a pouring opening 11 is formed at the upper edge of the platinum crucible 1, and the cross section of the pouring opening 11 is triangular and gradually reduced in diameter; furthermore, in order to match the structure of the pouring opening 11, a V-shaped notch 24 is formed at the upper edge of the main body 21, the size of the notch 24 is suitable for the pouring opening 11 of the platinum crucible to extend out, and the extending length of the pouring opening 11 is not greater than the wall thickness of the main body 1, that is, the pouring opening 11 is located in a circular truncated cone region surrounded by the outer wall of the main body 1, so that the platinum crucible 1 is effectively protected.

In the embodiment, in order to further prevent impurities from falling into the sample and ensure more accurate analysis data, the combined platinum crucible for analyzing the uranium content in the air filtration membrane further comprises a top cover 3 buckled on the top of the support frame 2, and the top cover 3, the platinum crucible 1 and the support frame 2 are coaxially arranged; the top cover 3 includes a cover plate 31 and a flange 32 formed at an edge of a bottom surface thereof. The inner diameter of the convex edge 32 is 1.0 mm larger than the maximum outer diameter of the main body 21 of the support frame 2;

furthermore, in order to conveniently clamp the top cover 3 by using the crucible tongs, a clamping handle 33 is arranged at the top of the top cover 3, the clamping handle 33 is vertically arranged at the center of the top of the cover plate 31, and the shape of the clamping handle 33 is any structural form capable of realizing the clamping function, such as a semicircular ring, a semicircular ring and the like.

In this embodiment, in order to satisfy the use conditions of the standard method, the support frame 2 and the top cover 3 are made of ceramic materials, and the ceramic materials have good thermal conductivity, small thermal expansion coefficient and can resist high temperature of 1200 ℃, so that the combined platinum crucible is resistant to high temperature and can withstand high-temperature burning of a muffle furnace.

The utility model discloses a working process:

placing an air filter membrane sample to be analyzed in a platinum crucible, covering a ceramic top cover, placing the platinum crucible in a muffle furnace, ashing at high temperature, taking a concave part of an outer support frame by using a crucible clamp, clamping a combined crucible to an electric heating plate, hooking a semicircular ring on the top cover by using the crucible clamp, taking the top cover down, adding nitric acid for continuous heating, taking the concave part of the outer support frame by using the crucible clamp after the electric heating plate is treated, clamping the combined crucible to a tray for cooling, adding nitric acid acidized water, and pouring liquid along a notch on the platinum crucible to adjust the pH value to be detected.

The utility model changes the platinum crucible used alone in the standard method into a double-layer design, and adds the ceramic support frame and the ceramic top cover as an outer layer structure. The platinum crucible is an ashing digestion container required by a standard method, but has soft texture, easy deformation, easy quality dumping, good thermal conductivity of ceramic materials, small thermal expansion coefficient and high temperature resistance of 1200 ℃; the double-deck design of platinum crucible and ceramic support frame, both high temperature resistant can stand the high temperature firing of muffle furnace, has improved the holistic hardness of crucible simultaneously again and has been convenient for press from both sides and get, prevents that the platinum material from warping the slope, and has increased and has emptyd the notch drainage, and difficult wall built-up when liquid shifts reduces the sample loss, has increased ceramic top cap again, prevents to drop into impurity in the sample, makes the analytical data more accurate like this.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.

Claims

1. The utility model provides an analysis of air filter membrane uranium content is with combination platinum crucible, includes platinum crucible (1), its characterized in that: the bottom of the platinum crucible (1) is a plane, and a support frame (2) is sleeved outside the platinum crucible; the support frame (2) comprises a hollow main body (21), the taper of the inner wall of the main body (21) is the same as that of the outer wall of the platinum crucible (1), and the inner wall of the main body (21) is attached to the outer wall of the platinum crucible (1).

2. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 1, wherein: a pouring opening (11) is formed at the upper edge of the platinum crucible (1).

3. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 1, wherein: the main body (21) is of a round table structure with a wide upper part and a narrow lower part, and the top bottom surface of the main body and the top bottom surface of the platinum crucible (1) are positioned on the same horizontal plane.

4. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 3, wherein: the support frame (2) further comprises support legs (22) arranged on the middle lower portion of the main body (21), and the support legs (22) are of hollow circular truncated cone-shaped structures with narrow tops and wide bottoms.

5. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 4, wherein: the vertical distance between the joint of the support leg (22) and the main body (21) and the bottom surface of the main body (21) is one third of the height of the main body (21), the bottom surface of the support leg (22) and the bottom surface of the main body (21) are in the same horizontal plane, and the included angle alpha between a bus of the outer wall of the support leg (22) and the horizontal line is 60 degrees.

6. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 1, wherein: the outer wall of the main body (21) forms an annular clamping groove (23), the clamping groove (23) is arranged above the joint of the supporting leg (22) and the main body (21), and the bottom of the groove is an arc surface.

7. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 1, wherein: the upper edge of the main body (21) forms a gap (24).

8. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 1, wherein: the device also comprises a top cover (3) buckled at the top of the support frame (2), and the top cover (3) is coaxially arranged with the platinum crucible (1) and the support frame (2); the top cover (3) comprises a cover plate (31) and a convex edge (32) formed on the edge of the bottom surface of the top cover.

9. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 8, wherein: the top of the cover plate (31) is provided with a clamping handle (33).

10. The combined platinum crucible for the analysis of the uranium content of an air filtration membrane according to claim 1 or 2, wherein: the supporting frame (2) and the top cover (3) are made of ceramic materials.