CN210097728U

CN210097728U - Experimental device for quantitative analysis chemistry

Info

Publication number: CN210097728U
Application number: CN201920462649.3U
Authority: CN
Inventors: 周恩红; 金俊成
Original assignee: West Anhui Health Vocational College; West Anhui University
Current assignee: West Anhui Health Vocational College; West Anhui University
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-02-21
Anticipated expiration: 2029-04-08

Abstract

The utility model discloses an experimental apparatus for be used for quantitative analysis chemistry, including table surface, pipette and the support column of fixed welding at table surface center, the upper end fixedly connected with guide pillar of support column, the sleeve pipe has been cup jointed to the outside of guide pillar, the fixed disc of sheathed tube upper end fixedly connected with second, the first fixed disc of sheathed tube lower extreme fixedly connected with, it has a plurality of groups's perforating hole to distribute as central annular on the terminal surface of first fixed disc, it has a plurality of groups's perforating hole to distribute as central annular equally to use it on the terminal surface of the fixed disc of second, the centre of a circle of the perforating hole of seting up on the fixed disc terminal surface of second and the centre of a circle of the perforating hole of seting up on the terminal surface of first fixed disc are located same straight line in the vertical direction. The utility model discloses a carry out structural improvement to the pipette holder, make the pipette operate on the storage shelf and can accomplish the experiment, avoided manual operation's trouble, device simple structure has practiced thrift the occupation of land space.

Description

Experimental device for quantitative analysis chemistry

Technical Field

The utility model relates to a chemistry experiment equipment field especially relates to an experimental apparatus for quantitative analysis chemistry.

Background

The chemical quantitative analysis is to determine the content of the relevant composition in the substance on the basis of qualitative analysis and structural analysis, and can be roughly divided into several steps of sampling, analyzing the sample, decomposing the sample, preparing the analysis sample solution, separating, measuring and evaluating the analysis result. Commonly used quantitative analysis instruments are: high performance liquid chromatograph, gas chromatograph, spectrophotometer, glass instrument commonly used (beaker, graduated flask, glass stick, volumetric flask etc.), balance etc, wherein the pipettor uses the most common one in the chemistry experiment, current pipette is connected aurilave and pipette through personnel manual operation when using, thereby it shifts to extrude aurilave messenger pipette inside formation negative pressure carries out quantitative suction with liquid, personnel manual operation is consuming time hard, and the accuracy of drawing of liquid is accurate inadequately, can cause the influence to subsequent experimental work, the pipette is not destroyed in order to protect after finishing using simultaneously, can place the pipette and preserve on dedicated shelf, it is great that like this will lead to the space that occupies the laboratory, be unfavorable for the smooth expansion of experimental work.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide an experimental apparatus for quantitative analysis chemistry, make the pipette operate on the storage shelf and can accomplish the experiment, whole experimental apparatus is simple structurally, has saved the occupation of land space of experiment.

The experimental device for quantitative analytical chemistry according to the embodiment of the utility model comprises a worktable, a pipette and a support column fixedly welded at the center of the worktable, wherein the upper end of the support column is fixedly connected with a guide pillar, the outside of the guide pillar is sleeved with a sleeve, the upper end of the sleeve is fixedly connected with a second fixed disc, the lower end of the sleeve is fixedly connected with a first fixed disc, a plurality of groups of through holes are annularly distributed on the end surface of the first fixed disc by taking the guide pillar as the center, a plurality of groups of through holes are also annularly distributed on the end surface of the second fixed disc by taking the guide pillar as the center, the circle center of the through hole formed on the end surface of the second fixed disc and the circle center of the through hole formed on the end surface of the first fixed disc are positioned on the same straight line in the vertical direction, a threaded hole matched with an adjusting bolt is arranged between the second fixed disc and the first fixed disc, adjusting bolt with the sleeve pipe is arranged perpendicularly, and adjusting bolt runs through threaded connection sleeve pipe and guide pillar contact, the pipette inserts from the perforating hole of the fixed disc terminal surface of second and extends to the perforating hole of first fixed disc terminal surface, the diameter of perforating hole with the diameter of pipette is the same, the top swing joint of guide pillar has flexible post, the top fixed mounting of flexible post has spacing platform, the diameter of spacing platform is the same with the sheathed tube diameter, the top center department of flexible post rotates and is connected with the pivot, the connecting rod has been cup jointed to the periphery of pivot, the other end fixed mounting of connecting rod has the aurilave clamp, the aurilave has been placed on the aurilave clamp.

Preferably, the pipette comprises mouth of pipe, tripe pipe, pipette body, scale mark, suction nozzle, tripe pipe is connected to the upper end of pipette body, lower extreme fixedly connected with suction nozzle, the surface of pipette body is carved with the scale mark.

Preferably, the diameter of tripe pipe is greater than the diameter of pipette body, the mouth of pipe with the gas outlet of aurilave can be dismantled and be connected.

Preferably, the telescopic column is inserted into the guide column, and the telescopic column is connected with the guide column in a sliding friction mode.

Preferably, the ear washing ball clamp can rotate by three hundred and sixty degrees by taking the rotating shaft as a circle center through the connecting rod.

Preferably, the sleeve, the first fixed disk and the second fixed disk are integrally formed members.

The utility model discloses in, carry out structural improvement to the pipette rack, can adjust the height of fixed plectane through operation adjusting bolt, thereby change the height of pipette, make the pipette be applicable to different work scenes, top at flexible post sets up the pivot, aurilave clamp is connected in the pivot, can fix aurilave, thereby the height that aurilave can be adjusted to flexible post is connected with the pipette and is accomplished experimental work, manual operation's trouble has been avoided, all pipettes after the effectual work efficiency experiment that has improved when experimenting finishes can all be deposited in on the fixed plectane, such design can make the pipette can carry out experimental operation on the pipette rack, the occupation of land space in laboratory has been saved.

Drawings

The accompanying drawings 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 not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of an experimental apparatus for quantitative analytical chemistry according to the present invention;

FIG. 2 is a schematic diagram of the pipette of the present invention;

FIG. 3 is a top view of the ear washing ball clamp and the limiting table of the present invention;

FIG. 4 is an enlarged view of the experimental apparatus for quantitative analytical chemistry of the present invention at A in FIG. 1.

In the figure: 1. a work table; 2. a support pillar; 3. a guide post; 4. a first fixed disk; 5. a sleeve; 6. adjusting the bolt; 7. a second fixed disk; 8. a through hole; 9. a limiting table; 10. a rotating shaft; 11. a connecting rod; 12. washing the ear balls; 13. a pipette; 131. a pipe orifice; 132. a large belly pipe; 133. a pipette body; 134. scale lines; 135. a suction nozzle; 14. ear washing ball hoop; 15. a telescopic column.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element 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" and "first" 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" or "second" 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 specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-4, an experimental apparatus for quantitative analytical chemistry comprises a worktable 1, a pipette 13 and a supporting column 2 fixedly welded at the center of the worktable 1, the upper end of the supporting column 2 is fixedly connected with a guide pillar 3, the exterior of the guide pillar 3 is sleeved with a sleeve 5, the upper end of the sleeve 5 is fixedly connected with a second fixed disk 7, the lower end of the sleeve 5 is fixedly connected with a first fixed disk 4, a plurality of groups of through holes 8 are annularly distributed on the end surface of the first fixed disk 4 by taking the guide pillar as the center, a plurality of groups of through holes 8 are also annularly distributed on the end surface of the second fixed disk 7 by taking the guide pillar as the center, the circle center of the through hole 8 arranged on the end surface of the second fixed disk 7 and the circle center of the through hole 8 arranged on the end surface of the first fixed disk 4 are vertically positioned on the same straight line, a threaded hole matched with an adjusting bolt 6 is arranged between the second fixed disk 7 and, the adjusting bolt 6 is vertically arranged with the sleeve 5, the adjusting bolt 6 penetrates through the sleeve 5 through threaded connection to be contacted with the guide pillar 3, the pipette 13 is inserted into the through hole 8 extending to the end face of the first fixed disc 4 from the through hole 8 on the end face of the second fixed disc 7, the diameter of the through hole 8 is the same as that of the pipette 13, the top end of the guide pillar 3 is movably connected with a telescopic column 15, the top of the telescopic column 15 is fixedly provided with a limiting table 9, the diameter of the limiting table 9 is the same as that of the sleeve 5, the center of the top of the telescopic column 15 is rotatably connected with a rotating shaft 10, the periphery of the rotating shaft 10 is sleeved with a connecting rod 11, the other end of the connecting rod 11 is fixedly provided with an ear washing ball clamp 14; the pipette 13 consists of a pipe orifice 131, a belly pipe 132, a pipette pipe body 133, scale marks 134 and a suction nozzle 135, wherein the upper end of the pipette pipe body 133 is connected with the belly pipe 132, the lower end of the pipette pipe body 133 is fixedly connected with the suction nozzle 135, and the scale marks 134 are carved on the surface of the pipette pipe body 133; the diameter of the belly pipe 132 is larger than that of the pipette pipe body 133, and the pipe orifice 131 is detachably connected with the air outlet of the ear washing ball 12; the telescopic column 15 is inserted into the guide column 3, and the telescopic column 15 is connected with the guide column 3 in a sliding friction manner; the ear washing ball hoop 14 can rotate by three hundred and sixty degrees by taking the rotating shaft 10 as the center of a circle through the connecting rod 11; the sleeve 5, the first fixed disk 4 and the second fixed disk 7 are integrally formed members.

When the device works, a pipette 13 stored on the device is taken down from a pipette rack and soaked in a dilute hydrochloric acid solution, then one of the pipette 13 is taken out and inserted into a through hole 8 of a second fixed disc 7, the lower end of the pipette 13 penetrates out of the through hole 8 on a first fixed disc 4, a large-belly tube 132 of the pipette 13 is larger than the diameter of the through hole 8 and is clamped and fixed in the fixed disc, the position of the pipette 13 is adjusted according to the height of a chemical liquid containing cup in the experimental process, when the position is adjusted, a person rotates a counterclockwise adjusting bolt 6 to separate from a guide post 3, then an up-and-down moving sleeve 5 is adjusted to a proper position, the adjusting bolt 6 is rotated clockwise to abut against the guide post 3 to fix the pipette 13, the position of an ear-washing ball clamp 14 is adjusted by pulling a telescopic post 15 upwards, so that an ear-washing ball 12 is in sealing connection with a tube opening 131 at the, personnel extrude aurilave 12 and make its inside negative pressure that forms with the inside cavity of pipette 13, inside liquid was inhaled to pipette 13 under the effect of atmospheric pressure, can observe the volume of getting liquid through the scale mark 134 on pipette body 133 surface, after the experimentation, with all pipette 13 insert to first fixed disc 4 and second fixed disc 7 in can.

To sum up, this device carries out structural improvement to the pipette rack, can adjust the height of fixed plectane through operation adjusting bolt, thereby change the height of pipette, make the pipette be applicable to different work scenes, top at flexible post sets up the pivot, aurilave clamp is connected in the pivot, can fix the aurilave, thereby the height that the aurilave can be adjusted to flexible post is connected with the pipette and is accomplished experimental work, manual operation's trouble has been avoided, effectual work efficiency when having improved the experiment finishes on the back all pipettes can all be deposited in fixed plectane, such design can make the pipette can test operation on the pipette rack, the occupation of land space in laboratory has been saved.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. Experimental set-up for quantitative analytical chemistry, characterized in that: the device comprises a worktable, a pipette and a support column fixedly welded at the center of the worktable, wherein the upper end of the support column is fixedly connected with a guide column, the outer part of the guide column is sleeved with a sleeve, the upper end of the sleeve is fixedly connected with a second fixed disc, the lower end of the sleeve is fixedly connected with a first fixed disc, a plurality of groups of through holes are annularly distributed on the end surface of the first fixed disc by taking the first fixed disc as the center, a plurality of groups of through holes are annularly distributed on the end surface of the second fixed disc by taking the second fixed disc as the center, the circle center of the through hole formed on the end surface of the second fixed disc and the circle center of the through hole formed on the end surface of the first fixed disc are positioned on the same straight line in the vertical direction, a threaded hole matched with an adjusting bolt is arranged between the second fixed disc and the first fixed disc on the outer wall of, and adjusting bolt runs through threaded connection sleeve pipe and guide pillar contact, the pipette inserts from the perforating hole of the fixed disc terminal surface of second and extends to the perforating hole of first fixed disc terminal surface, the diameter of perforating hole with the diameter of pipette is the same, the top swing joint of guide pillar has flexible post, the top fixed mounting of flexible post has spacing platform, the diameter of spacing platform is the same with the sheathed tube diameter, the top center department of flexible post rotates and is connected with the pivot, the periphery of pivot has cup jointed the connecting rod, the other end fixed mounting of connecting rod has the aurilave clamp, the aurilave has been placed on the aurilave clamp.

2. An experimental apparatus for quantitative analytical chemistry according to claim 1, characterized in that: the pipette comprises mouth of pipe, tripe pipe, pipette body, scale mark, suction nozzle, the tripe pipe is connected to the upper end of pipette body, lower extreme fixedly connected with suction nozzle, the scale mark is carved with on the surface of pipette body.

3. An experimental apparatus for quantitative analytical chemistry according to claim 2, characterized in that: the diameter of tripe pipe is greater than the diameter of pipette body, the mouth of pipe with the connection can be dismantled to the gas outlet of aurilave.

4. An experimental apparatus for quantitative analytical chemistry according to claim 1, characterized in that: the telescopic column is inserted into the guide column and connected with the guide column in a sliding friction mode.

5. An experimental apparatus for quantitative analytical chemistry according to claim 1, characterized in that: the ear washing ball hoop can rotate by three hundred and sixty degrees by taking the rotating shaft as the circle center through the connecting rod.

6. An experimental apparatus for quantitative analytical chemistry according to claim 1, characterized in that: the sleeve, the first fixed disk and the second fixed disk are integrally formed components.