CN201548532U - Liquid chromatography with light switching mechanism - Google Patents

Liquid chromatography with light switching mechanism Download PDF

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Publication number
CN201548532U
CN201548532U CN2009202465807U CN200920246580U CN201548532U CN 201548532 U CN201548532 U CN 201548532U CN 2009202465807 U CN2009202465807 U CN 2009202465807U CN 200920246580 U CN200920246580 U CN 200920246580U CN 201548532 U CN201548532 U CN 201548532U
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China
Prior art keywords
condenser
lamp
horizontal
plummet
base
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Expired - Lifetime
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CN2009202465807U
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Chinese (zh)
Inventor
王悦
王铁军
李维森
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SUZHOU RIGOL PRECISION ELECTRIC TECHNOLOGIES CO., LTD.
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BEIJING RIGOL SCIENCE AND TECHNOLOGY Co Ltd
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Priority to CN2009202465807U priority Critical patent/CN201548532U/en
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Abstract

The utility model relates to a liquid chromatography with a light switching mechanism, which comprises two light sources of a deuterium lamp and a deuterium lamp that are arranged on a monochromator base of a photometer, and the light switching mechanism, wherein the deuterium lamp and the deuterium lamp are arranged on two sides of a connecting wire between incident slits of the light switching mechanism and the monochromator, the light switching mechanism comprises a condensing mirror module, a stepping motor, a rocking beam, two eccentric shafts and a return spring, the bottom part of the condensing mirror module is connected with a rotating shaft of the stepping motor driving the condensing mirror module to rotate, the side wall is transversely and fixedly connected with a rocking beam, the two eccentric shafts are respectively arranged on two sides of the rocking beam, and one end of the return spring is arranged on the condensing mirror module, while the other end is arranged on the base. The utility model has high positioning precision, good instrumental base line connection, convenient switching between the two light sources, simple structure, and convenient adjustment and use.

Description

A kind of have a liquid chromatograph that changes lamp mechanism
Technical field
The utility model relates to a kind of liquid chromatograph that changes lamp mechanism that has.
Background technology
High performance liquid chromatograph is an instrument and equipment of realizing liquid-phase chromatographic analysis, and its elementary cell is formed as Figure 1-1, and highly effective liquid phase chromatographic system should comprise several parts such as transfusion system, sampling system, separating column, detecting device and data handling system at least.
Sample branch after chromatographic column is separated enters detecting device with moving phase, and the physics or the chemical characteristic of pressing sample are the easy electric signal of measuring with information translation, and note, and obtain the chromatogram that sample component is separated.Position, shape and size by the spectrum peak can be judged the quality of separating, and carry out qualitative, quantitative test.Therefore the ultraviolet-visible spectrum detecting device becomes μ-the most frequently used detecting device of LC system because of its universality.
The outside optical system of ultraviolet-visible detecting device generally is made up of light source, catoptron or lens, generally adopts two light sources, and one is ultraviolet source such as deuterium lamp, and another is visible light source such as tungsten lamp; Catoptron is generally used concave mirror, and the outside optical system of some instrument adopts lens or cylindrical mirror, and the effect of these mirrors is that photoimaging that light source is sent is on the entrance slit of monochromator.In the automatic length scanning process of instrument, two light sources automatically switch, and the mechanism that realizes this action is called and changes lamp mechanism.Traditional lamp mechanism that changes realizes changing the lamp action by rotating lamp or light source reflector, in order to finish the switching between the light source.
The light source of ultraviolet-visible detecting device switches following several form substantially:
1) as Figure 1-1, deuterium lamp 1 ' and tungsten lamp 2 ' are positioned at the homonymy of concave mirror 3 ', the light source switching is moved by driven by motor plane mirror 6 ' and is realized, final by entrance slit 4 ' and color filter 5 ', the structure more complicated that the driven by motor plane mirror moves, need with motor rotation convert rectilinear motion to by physical construction, and the increase of catoptron can bring the loss of energy.
2) shown in Fig. 1-2, deuterium lamp 1 ' and tungsten lamp 2 ' are positioned at the both sides of concave mirror 3 '.Deuterium lamp 1 ' and tungsten lamp 2 ' maintain static, light source switches by the 3 ' rotation of driven by motor concave mirror to be realized, final by entrance slit 4 ' and color filter 5 ', the vibrations of the positioning error of stepper motor itself or motor itself cause repetitive positioning accuracy bad and cause the linking of instrument baseline bad.
3) as Figure 1-3, deuterium lamp 1 ' and tungsten lamp 2 ' are fixed on the group seat 7 '.Concave mirror 3 ' is fixed, light source switch to be that group seat 7 ' by driven by motor deuterium lamp 1 ' and tungsten lamp 2 ' moves to be realized, final by entrance slit 4 ' and color filter 5 ', with first kind similar, and deuterium lamp 1 ' tungsten lamp 2 ' can not open simultaneously, opens the interference that has parasitic light simultaneously.
4) shown in Fig. 1-4, deuterium lamp 1 ' and tungsten lamp 2 ' are fixed on a side of concave mirror 3 '.Deuterium lamp 1 ' and tungsten lamp 2 ' are done and are made deuterium tungsten lamp 8 ' together, be positioned at the left side or the right side of concave mirror 3 ', concave mirror 3 ' maintains static, light source is imaged on the entrance slit 4 ' by concave mirror 3 ', deuterium lamp done with tungsten lamp be in the same place, need a structure, for example shutter, structure more complicated like this with deuterium lamp 1 ' and the separation of tungsten lamp 2 ' light source.
Comprehensive above several lamp modes of changing, as can be seen second kind to change lamp mode structure simpler, both can realize the switching of light source by the rotation of motor, but need reduce or eliminate the positioning error of stepper motor itself or the inaccurate problem excessive of the repetitive positioning accuracy that vibrations caused of solution motor itself with noise.
The utility model content
The technical problems to be solved in the utility model is, a kind of liquid chromatograph that changes lamp mechanism that has is provided, have can realize UV-lamp and visible lamp change lamp mechanism, the bearing accuracy height, the instrument baseline is connected, can carry out the switching of two light sources very easily, simple in structure, adjusting and use are all very convenient.
The utility model is by the following technical solutions:
A kind of have a liquid chromatograph that changes lamp mechanism, comprise the deuterium lamp that is arranged on the photometric monochromator base, two light sources of tungsten lamp and change lamp mechanism, described deuterium lamp and tungsten lamp are arranged on the both sides of changing the line between lamp mechanism and the monochromator entrance slit, this changes lamp mechanism and comprises the condenser module, stepper motor, fork, two excentric shafts and back-moving spring, wherein, the condenser module bottom connects the rotating shaft of the stepper motor that drives the rotation of condenser module, the horizontal affixed fork of sidewall, two excentric shafts are separately positioned on the both sides of fork, described back-moving spring one end is arranged on the condenser module, and the other end is arranged on the base.
Described condenser module comprises condenser, optically focused microscope base and condenser swivel base, and wherein, condenser is fixedlyed connected with the optically focused microscope base, and the optically focused microscope base is arranged on the condenser swivel base;
Described condenser swivel base is an inverted T-shape bearing of being made up of plummet support arm and horizontal mounting arm, the plummet support arm of this inverted T-shape bearing is provided with an optically focused microscope base and adjusts the hole, this optically focused microscope base is adjusted the axially consistent with the brachium direction of horizontal mounting arm of hole, and this optically focused microscope base is adjusted the hole and is radially had a horizontal opening, and vertical described horizontal opening is provided with the threaded hole of mounting screw on the plummet support arm; One end of described horizontal mounting arm has horizontal opening, and the brachium direction along horizontal mounting arm is provided with two mounting screws, the other end of described horizontal mounting arm has the plummet opening, at threaded hole with the mounting screw that is provided with vertical plummet opening on the horizontal mounting arm end of plummet opening and the connecting hole that fork is set.
The optically focused microscope base is adjusted the hole and is radially had a horizontal opening, vertical described horizontal opening is provided with the threaded hole of mounting screw on the plummet support arm, in order to regulate the size of horizontal opening, fixing optically focused microscope base, and can carry out the rotation adjusting of condenser scale direction and the axial translation adjustment of condenser horizontal direction, wherein, rotation is regulated by regulating the anglec of rotation realization between optically focused microscope base and the condenser swivel base; Axial translation is finely tuned realization by the fixed position of optically focused microscope base and condenser swivel base, so that condenser is adjusted to the appropriate location.
One end of described horizontal mounting arm has horizontal opening, has the threaded hole that is provided with the mounting screw of vertical-horizontal opening on the horizontal mounting arm end of horizontal opening, and the brachium direction along horizontal mounting arm is provided with two mounting screws, in order to regulate the angle of horizontal opening, regulate the luffing angle of condenser swivel base plummet support arm, and then regulate the adjustment of the luffing angle of condenser.
The other end of described horizontal mounting arm has the plummet opening, has the threaded hole that is provided with the mounting screw of vertical plummet opening on the horizontal mounting arm end of plummet opening, in order to regulate the size of plummet opening, the fixing turning axle of stepper motor, can be to the edge perpendicular to the rotation of the direction of plummet support arm and horizontal mounting arm and the adjustment of translation, wherein sense of rotation is that driving force by stepper motor provides and adjusts, and translation direction is by the fixed position of condenser swivel base and step motor shaft is finely tuned.
Thus, realize the adjustment of five degree of freedom of condenser, its degree of accuracy is improved.
Described condenser outer setting one diaphragm, this diaphragm is fixed by the mounting screw of vertical-horizontal opening on the described plummet support arm, the power of the light beam that passes through in order to control bundle throughput and adjusting.
The light that the utility model sends by deuterium lamp and tungsten lamp passes through the source reflection mirror reflection respectively and focuses on the entrance slit of monochromator, deuterium lamp and tungsten lamp are fixed on the photometric monochromator base, in the both sides of changing the line between lamp mechanism and the monochromator entrance slit, the condenser that changes in the lamp mechanism is installed on the condenser swivel base that has fork, change the swing incision light path of certain limit on surface level into by the rotation of stepper motor, realize the purpose of toggle lights, stepper motor is by the automatic program control circuit control of prior art, and realize by the position of excentric shaft restriction fork the location of hunting range.
The utlity model has following advantage:
1) the lamp mechanism that changes of the present utility model can eliminate or reduce because the positioning error of the error of machining assembling or stepper motor itself and cause the bad problem that the instrument baseline is bad or noise objective is excessive that causes of repetitive positioning accuracy because of the vibrations of motor itself, position and the excentric shaft of adjusting condenser by the condenser swivel base with five degree of freedom adjustings limit the hunting range of regulating fork, the bearing accuracy height, the instrument baseline is connected.
2) the starting power effect of the stepper motor in the utility model does not play the role of positioning and reaches the positioning error minimum, the fine setting excentric shaft can carry out tiny adjusting to two switching points of light source according to light path, the deviation of two positions being brought with the positioning error of eliminating machining and motor.
3) the utility model can carry out the switching of two light sources very easily, changes lamp time weak point, and is simple in structure, easy to adjust.
Description of drawings
Fig. 1-the 1st existing changes the structural representation that deuterium lamp and tungsten lamp in the lamp mechanism are positioned at the homonymy of concave mirror;
Fig. 1-2 is the existing structural representation that deuterium lamp and tungsten lamp in the lamp mechanism are positioned at the both sides of concave mirror that changes;
Fig. 1-the 3rd existing changes that deuterium lamp and tungsten lamp are fixed on a structural representation on the group seat in the lamp mechanism;
Fig. 1-the 4th, existing left side or the right side that deuterium tungsten lamp in the lamp mechanism is positioned at concave mirror, the fixed structural representation of concave mirror of changing.
Fig. 2 is a structural representation of the present utility model;
Fig. 2-the 1st is for the spacing structural representation of tungsten lamp;
Fig. 2-the 2nd is for the spacing structural representation of deuterium lamp;
Fig. 2-the 3rd, the utility model are in the structural representation of tungsten lamp and the deuterium lamp equilibrium position between spacing;
Fig. 3 is the mounting structure synoptic diagram of spring;
Fig. 4 is the mounting structure synoptic diagram of biasing post;
Fig. 5 is the mounting structure synoptic diagram of condenser module;
Fig. 6-the 1st, the structural representation of the one side of condenser module;
Fig. 6-the 2nd, the structural representation of the another side of condenser module;
Fig. 7 is the structural relation synoptic diagram of condenser and condenser swivel base;
Fig. 8 is the structural relation synoptic diagram of condenser diaphragm and condenser;
Fig. 9 is the structural relation synoptic diagram of condenser and optically focused microscope base.
Embodiment
Embodiment
As Fig. 2, shown in 3, a kind of have a liquid chromatograph that changes lamp mechanism, comprise the deuterium lamp 2 that is arranged on the photometric monochromator base 1,3 two light sources of tungsten lamp and change lamp mechanism 4, described deuterium lamp 2 and tungsten lamp 3 are arranged on the both sides of changing the line between lamp mechanism 4 and the monochromator entrance slit 11, this changes lamp mechanism 4 and comprises condenser module 5, stepper motor 6, fork 7, two excentric shafts 8 and back-moving spring 9, wherein, condenser module 5 bottoms connect the rotating shaft 61 of the stepper motor that drives 5 rotations of condenser module, the horizontal affixed fork 7 of sidewall, two excentric shafts 8 are separately positioned on the both sides of fork 7, described back-moving spring 9 one ends are arranged on the condenser module 5, and the other end is arranged on the base 1.As shown in Figure 4, excentric shaft 8 can be that finely tune at the center with its axle center as required, so that regulate the accurate switching that the hunting range of fork realizes light source and condenser then.
Shown in Fig. 5,6-1,6-2,7,9, described condenser module 5 comprises condenser 51, optically focused microscope base 52 and condenser swivel base 53, and wherein, condenser 51 is fixedlyed connected with optically focused microscope base 52, and optically focused microscope base 52 is arranged on the condenser swivel base 53;
Described condenser swivel base 53 is an inverted T-shape bearing of being made up of plummet support arm 531 and horizontal mounting arm 532, the plummet support arm 531 of this inverted T-shape bearing is provided with an optically focused microscope base and adjusts hole 533, this optically focused microscope base is adjusted the axially consistent with the brachium direction of horizontal mounting arm 532 of hole 533, and this optically focused microscope base is adjusted hole 533 and is radially had a horizontal opening 534, and vertical described horizontal opening 534 is provided with the threaded hole 536 of mounting screw 535 on plummet support arm 531; One end of described horizontal mounting arm 532 has horizontal opening 537, and the brachium direction along horizontal mounting arm 532 is provided with two mounting screws 535, the other end of described horizontal mounting arm has plummet opening 521, at threaded hole 536 with the mounting screw 535 that is provided with vertical plummet opening 521 on the horizontal mounting arm end of plummet opening 521 and the connecting hole 522 that fork 7 is set.
As shown in Figure 8, described condenser 51 outer setting one diaphragm 54, this diaphragm 54 is fixing by the mounting screw 535 of vertical-horizontal opening on the described plummet support arm 531.
Shown in Fig. 2-1,2-2,2-3, change lamp mechanism under the drive that stepper motor rotating shaft 61 is rotated, rotation in the horizontal direction, because excentric shaft is spacing to fork, rotation is become the purpose of swing and then realization toggle lights, shown in Fig. 2-1, the reflection that is tungsten lamp 3 emission light beams at this moment by condenser 51 enters entrance slit 11; The reflection that Fig. 2-the 2nd is deuterium lamp 2 emission light beams at this moment by condenser 51 enters entrance slit 11; Fig. 2-the 3rd, fork 7 is in the equilibrium position; Behind electrical power, produce driving force, this driving force can make back-moving spring 9 produce restoring force, this restoring force is the tangential force shown in the figure direction of arrow just, this power can drive and change lamp mechanism 4 is the center with stepper motor rotating shaft 61, rotates, when swing-bar mechanism rotates to excentric shaft 8 positions, force it to stop, realizing the effect of location.

Claims (4)

1. one kind has the liquid chromatograph that changes lamp mechanism, it is characterized in that, comprise the deuterium lamp that is arranged on the photometric monochromator base, two light sources of tungsten lamp and change lamp mechanism, described deuterium lamp and tungsten lamp are arranged on the both sides of changing the line between lamp mechanism and the monochromator entrance slit, this changes lamp mechanism and comprises the condenser module, stepper motor, fork, two excentric shafts and back-moving spring, wherein, the condenser module bottom connects the rotating shaft of the stepper motor that drives the rotation of condenser module, the horizontal affixed fork of sidewall, two excentric shafts are separately positioned on the both sides of fork, described back-moving spring one end is arranged on the condenser module, and the other end is arranged on the base.
2. a kind of liquid chromatograph that changes lamp mechanism that has according to claim 1, it is characterized in that described condenser module comprises condenser, optically focused microscope base and condenser swivel base, wherein, condenser is fixedlyed connected with the optically focused microscope base, and the optically focused microscope base is arranged on the condenser swivel base;
Described condenser swivel base is an inverted T-shape bearing of being made up of plummet support arm and horizontal mounting arm, the plummet support arm of this inverted T-shape bearing is provided with an optically focused microscope base and adjusts the hole, this optically focused microscope base is adjusted the axially consistent with the brachium direction of horizontal mounting arm of hole, and this optically focused microscope base is adjusted the hole and is radially had a horizontal opening, and vertical described horizontal opening is provided with the threaded hole of mounting screw on the plummet support arm; One end of described horizontal mounting arm has horizontal opening, and the brachium direction along horizontal mounting arm is provided with two mounting screws, the other end of described horizontal mounting arm has the plummet opening, at threaded hole with the mounting screw that is provided with vertical plummet opening on the horizontal mounting arm end of plummet opening and the connecting hole that fork is set.
3. a kind of liquid chromatograph that changes lamp mechanism that has according to claim 2 is characterized in that, described condenser outer setting one diaphragm, and this diaphragm is fixed by the mounting screw of vertical-horizontal opening on the described plummet support arm.
4. a kind of liquid chromatograph that changes lamp mechanism that has according to claim 2 is characterized in that, is provided with two mounting screws in the brachium direction of the horizontal mounting arm end upper edge horizontal mounting arm with horizontal opening.
CN2009202465807U 2009-11-04 2009-11-04 Liquid chromatography with light switching mechanism Expired - Lifetime CN201548532U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106523965A (en) * 2016-12-29 2017-03-22 中科和光(天津)应用激光技术研究所有限公司 Identical-optical-axis dual light source switching mechanism
CN108956516A (en) * 2018-08-28 2018-12-07 中国科学院合肥物质科学研究院 Ultraviolet EO-1 hyperion Atmospheric components survey meter path switching mechanisms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106523965A (en) * 2016-12-29 2017-03-22 中科和光(天津)应用激光技术研究所有限公司 Identical-optical-axis dual light source switching mechanism
CN108956516A (en) * 2018-08-28 2018-12-07 中国科学院合肥物质科学研究院 Ultraviolet EO-1 hyperion Atmospheric components survey meter path switching mechanisms
CN108956516B (en) * 2018-08-28 2021-06-01 中国科学院合肥物质科学研究院 Light path switching mechanism of ultraviolet hyperspectral atmospheric composition detector

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Owner name: BEIJING RIGOL TECHNOLOGIES, INC.

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Effective date: 20110307

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Address after: 102206 Beijing City, Shahe Town, step on the river village, No. 156

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Patentee before: Beijing RIGOL Science and Technology Co., Ltd.

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Patentee after: SUZHOU RIGOL PRECISION ELECTRIC TECHNOLOGIES CO., LTD.

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Patentee before: Beijing Rigol Technologies, Inc.

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Granted publication date: 20100811