CN117180773B - Kai's distillation system and method for automatically connecting and separating digestion tubes in static state - Google Patents
Kai's distillation system and method for automatically connecting and separating digestion tubes in static state Download PDFInfo
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- CN117180773B CN117180773B CN202311160365.6A CN202311160365A CN117180773B CN 117180773 B CN117180773 B CN 117180773B CN 202311160365 A CN202311160365 A CN 202311160365A CN 117180773 B CN117180773 B CN 117180773B
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- 238000004821 distillation Methods 0.000 title claims abstract description 199
- 230000029087 digestion Effects 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003068 static effect Effects 0.000 title claims abstract description 7
- 238000001704 evaporation Methods 0.000 claims abstract description 58
- 230000008020 evaporation Effects 0.000 claims abstract description 58
- 230000033001 locomotion Effects 0.000 claims description 57
- 238000007789 sealing Methods 0.000 claims description 32
- 210000001035 gastrointestinal tract Anatomy 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 5
- 230000001079 digestive effect Effects 0.000 abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 16
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- 230000008569 process Effects 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007696 Kjeldahl method Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 238000002331 protein detection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to a Kjeldahl distillation system and a method for automatically connecting and separating a digestive tube in a static state, wherein the system comprises a steam sliding table group and a splash-proof sliding table group, the steam sliding table group comprises an evaporation sliding block movably connected to a fixed plate, the evaporation sliding block is connected with a distillation head, the distillation head is connected with a vertically arranged steam tube, and the evaporation sliding block drives the distillation head and the steam tube to vertically move; the splash-proof sliding table group comprises a splash-proof sliding block movably connected to the fixed plate, and the splash-proof sliding block is used for fixing the splash-proof bottle and driving the splash-proof bottle to move to a space above the distillation head and coincide with the axis of the distillation head; the tube seat for placing the digestion tube is positioned in the space below the distillation head and coincides with the axis of the distillation head. The distillation head with the steam pipe can move along the vertical direction, so that the digestion pipe can be put in and taken out without tilting, and meanwhile, the splash-proof bottle is matched with the steam pipe to ensure the tightness of the distillation process, thereby realizing the automatic operation of the distillation process.
Description
Technical Field
The invention relates to the technical field of Kjeldahl nitrogen determination instruments, in particular to a Kjeldahl distillation system and a method for automatically connecting and separating a digestive tube in a static state.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The Kjeldahl method is a method for measuring the protein content in a sample by taking nitrogen element as a reference, namely, the sample is digested by concentrated sulfuric acid, organic nitrogen in the sample is converted into inorganic ammonium salt, then the ammonium salt is converted into ammonia under alkaline condition, the ammonia is distilled out along with water vapor and is absorbed by excessive boric acid liquid, then standard hydrochloric acid is used for titration, and the nitrogen content in the sample can be calculated through the consumed standard hydrochloric acid. Since the nitrogen content of the protein is relatively constant, the nitrogen content of the protein can be calculated, so the method is a classical quantitative protein detection method.
The detection equipment formed by the method is a Kjeldahl apparatus, and the Kjeldahl apparatus completes the process that ammonia is distilled out along with water vapor through a distillation system. In the distillation system, steam is introduced into the bottom of the digestion tube by the steam tube to boil the solution to be tested, so that ammonia in the solution to be tested is distilled out in the form of ammonia gas, and then the condensation process of the next step is performed.
In the process of realizing the distillation by using the Kjeldahl nitrogen determination instrument in the prior art, the installation and the disassembly of a digestion tube, a steam tube, a distillation head and a splash-proof bottle are required to be completed, and the use is inconvenient.
For example: the steam pipe is required to be inclined at a certain angle in the direction away from the azotometer, the digestion pipe is required to be inclined at a certain angle, the steam pipe can smoothly penetrate into the digestion pipe, the digestion pipe is installed in the Kjeldahl azotometer and placed on the pipe seat, the pipe opening of the digestion pipe is sealed by the installation of the distillation head under the condition that the digestion pipe is ensured to be restored to be vertical, and the splash-proof bottle is required to be installed on the distillation head to prevent liquid splashing during distillation. When the distillation process is finished, the splash-proof bottle and the distillation head are required to be removed one by one, and then the digestion tube is taken out by tilting operation.
Therefore, in the prior art, the digestion tube containing the sample needs to be installed in the Kjeldahl apparatus and continuously taken out at the end, so that the use is inconvenient, and the digestion tube needs to be inclined in the process of installation and removal, on one hand, the sealing of the orifice of the digestion tube is not tight, so that ammonia leakage is caused, and on the other hand, the inclined action easily causes the sample in the digestion tube to be sprayed out, so that the detection result is error.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a Kelvin distillation system and a Kelvin distillation method for automatically connecting and separating a digestion tube in a static state, so that a distillation head with a steam tube can move in a vertical direction, the digestion tube can be put in and taken out without tilting, and meanwhile, the sealing performance of a distillation process is ensured by matching the splash-proof bottle with the action of the steam tube, and the automatic operation of the distillation process is realized.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the first aspect of the invention provides a Kjeldahl distillation system for automatically connecting and separating a digestive tube in a static state, which comprises a host machine and a distillation system, wherein the host machine controls the distillation system to enable steam to be introduced into the digestive tube through a steam tube so as to boil a solution to be detected, and ammonia in the solution to be detected is distilled out in the form of ammonia gas and condensed; the distillation system comprises:
the steam sliding table group comprises an evaporation sliding block movably connected to the fixed plate, the evaporation sliding block is connected with a distillation head, the distillation head is connected with a vertically arranged steam pipe, and the evaporation sliding block drives the distillation head and the steam pipe to vertically move;
the splash-proof sliding table group comprises a splash-proof sliding block movably connected to the fixed plate, and the splash-proof sliding block is used for fixing the splash-proof bottle and driving the splash-proof bottle to move to a space above the distillation head and coincide with the axis of the distillation head;
the tube seat is used for placing the digestion tube, is positioned in the space below the distillation head and coincides with the axis of the distillation head.
Further, the steam slipway group is including connecting the first drive assembly on the fixed plate, and the power take off end of first drive assembly connects the rectilinear movement module of vertical arrangement, is equipped with the evaporation slider on the rectilinear movement module, converts the gyration motion of first drive assembly into rectilinear movement through the rectilinear movement module, drives the evaporation slider and drives distillation head and steam pipe vertical motion.
Further, the upper surface of the distillation head is provided with a sealing ring matched with the splash-proof bottle, the lower surface of the distillation head is provided with another sealing ring matched with the digestion tube, the distillation head is provided with a steam interface, a distillation outlet and a steam tube, the steam tube is vertically arranged in a space below the distillation head, and the top of the steam tube is communicated with the steam interface.
Further, the splash-proof sliding table group comprises a splash-proof sliding block movably connected to the fixing plate, one side of the splash-proof sliding block is used for connecting the splash-proof bottle, the other side of the splash-proof sliding block is connected with a first guide rail, the first guide rail is in sliding connection with a first sliding block, the first sliding block is connected to a first base, the first base is connected with a second sliding block, the second sliding block is in sliding connection with a second guide rail, the second guide rail is vertically arranged and connected to a second base, and the second base is connected with the fixing plate.
Further, the splash-proof bottle is arranged along the vertical direction, the bottom end is a pipe orifice, and the top end is detachably connected with the end cover.
Further, a guide groove is formed in the fixed plate, one side of the fixed plate is connected with the second driving assembly, the other side of the fixed plate is provided with a deflector rod, the power output end of the second driving assembly penetrates through the fixed plate and is connected with one end of the deflector rod, a hole is formed in the other end of the deflector rod, a driven piece is arranged in the hole, and the driven piece sequentially penetrates through the hole at the other end of the deflector rod, the guide groove and the first guide rail and then is connected with the splash-proof sliding block.
Further, the guide groove comprises a vertical groove and a horizontal groove, wherein one ends of the vertical groove and the horizontal groove are connected together, and arc transition is carried out on the vertical groove and the horizontal groove.
Further, the steam sliding table group comprises an evaporation sliding block movably connected to the fixed plate, the evaporation sliding block is connected to the top end of a vertically arranged steam pipe, the steam pipe sequentially penetrates through the splash-proof bottle and the distillation head to reach the digestion pipe, and the evaporation sliding block drives the steam pipe to vertically move.
Further, the splash-proof sliding table group comprises a third driving assembly connected with the fixing plate, the third driving assembly is connected with the linear motion module, a splash-proof sliding block is arranged on the linear motion module and used for connecting a splash-proof bottle, an end cover of the splash-proof bottle is provided with a hole, a steam pipe sequentially penetrates through the hole of the end cover, the distillation head and the digestion tube and is positioned on the same axis, the rotary motion of the third driving assembly is converted into linear motion through the linear motion module, and the splash-proof bottle is driven to realize vertical motion in the direction of the same axis with the digestion tube.
In a second aspect, the present invention provides a method for operating a kjeldahl distillation system for automatically connecting and disconnecting a stationary digestion vessel, comprising the steps of:
and (3) entering a distillation process after digestion: the digestion tube is placed on the tube seat, the distillation head is driven by the evaporation sliding block to move along the vertical direction and drive the steam tube to penetrate into the digestion tube until the distillation head and the digestion tube are matched to finish sealing of the digestion tube;
the splash-proof bottle is driven by the splash-proof sliding block to horizontally move towards the direction close to the digestion tube, and then moves to the position right above the digestion tube along the vertical direction until the bottle mouth of the splash-proof bottle is matched with the distillation head to finish sealing of the splash-proof bottle, and distillation is started;
taking out the sample after distillation: the splash-proof bottle moves vertically under the drive of the splash-proof sliding block, so that the bottle mouth of the splash-proof bottle is separated from the distillation head, then moves horizontally away from the digestion tube and the distillation head, the distillation head moves vertically under the drive of the steam sliding block, separation of the distillation head and the digestion tube and retraction of the steam tube are completed, and the digestion tube is taken out;
or (b)
And (3) entering a distillation process after digestion: after the digestion tube is placed on the tube seat, the steam tube moves in the vertical direction under the drive of the evaporation slide block, the splash-proof bottle moves in the vertical direction along the same axis under the drive of the splash-proof slide block, so that the steam tube stretches into digestion until the distillation head is matched with the digestion tube, and distillation is started;
taking out the sample after distillation: the splash-proof bottle moves along the vertical direction under the drive of the splash-proof sliding block, the steam pipe moves along the vertical direction under the drive of the evaporation sliding block, the separation and the retraction of the splash-proof bottle, the distillation head and the digestion pipe are completed, and the digestion pipe is taken out.
Compared with the prior art, the above technical scheme has the following beneficial effects:
1. the distillation head with the steam pipe can move along the vertical direction through the evaporation slide block, so that the steam pipe can be inserted into the digestion pipe along the vertical direction or separated from the digestion pipe, the digestion pipe can be put in and taken out without tilting, the sample is prevented from being spilled out, and the sealing effect of the distillation head is guaranteed in a vertical movement mode, and the distillation head is not easy to leak; the splash-proof bottle driven by the splash-proof sliding block can be matched with the distillation head at the position overlapped with the axis of the distillation head, so that the tightness of the distillation process is further ensured, and the automatic operation of the distillation process of the Kjeldahl nitrogen determination method is realized.
2. In the steam sliding table group, the rotary motion of the first driving component is converted into linear motion, and the position of the evaporation sliding block in the vertical direction can be controlled by controlling the rotating speed of the first driving component, so that the steam pipe can be filled into or taken out from the digestion pipe in the vertical direction.
3. In one of the structures of the splash-proof sliding table set, the deflector rod provides power through the second driving assembly and is matched with the guiding direction of the guide groove on the fixed plate, the formed circular arc movement can separate the distillation head from the splash-proof bottle in a 'first rising and then translating' mode, the splash-proof bottle can avoid interference with the rising movement of the distillation head, and the steam pipe can be completely exposed in the visual field of a user after being taken out of the digestion pipe, so that the splash-proof sliding table set is convenient to check and replace.
4. In the arc motion formed by the deflector rod, the motion in the horizontal direction is guided by the first guide rail, and the motion in the vertical direction is guided by the second guide rail, so that the horizontal position and the vertical position of the splash-proof bottle when being matched with the distillation head are controllable, and the sealing effect is reliable.
5. In another structure of the splash-proof sliding table set, the steam pipe penetrates through the opening of the end cover of the splash-proof bottle in advance and passes through the distillation head, the steam pipe reaches the inside of the digestion pipe under the drive of the evaporation sliding block and the axis coincides, so that the splash-proof sliding table set realizes the automatic lifting of the steam pipe while the steam pipe is driven by the third driving assembly, the splash-proof sliding table set realizes the automatic lifting of the splash-proof bottle on the same axis, the splash-proof bottle simplifies the structure because of no translation, and meanwhile, the splash-proof bottle is connected with the distillation head in advance, so that a possible leakage point is reduced.
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.
FIG. 1 is a schematic diagram of a distillation system according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a steam slide set in a distillation system according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a splash slide set in a distillation system according to an embodiment of the present invention;
FIG. 4 is a schematic view of a structure of a splash-proof slider set with a splash-proof bottle hidden in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a splash guard assembly according to an embodiment of the present invention, in which splash guard bottles are hidden from view;
FIG. 6 is a schematic diagram of a distillation system according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a distillation system according to a third embodiment of the present invention.
In fig. 1: 1 bracket, 2 digestion tube, 3 tube seat, 4 distillation head, 5 evaporation slide block, 6 ball screw, 7 first driving component, 8 splash-proof bottle;
in fig. 2: 41 sealing rings, 42 steam interfaces, 43 steam pipes and 51 guide components;
fig. 3-5: 81 end covers, 9 splash-proof sliding blocks, 91 first guide rails, 911 first sliding blocks, 92 second guide rails, 921 second sliding blocks, 93 first bases, 94 second bases, 10 fixing plates, 101 guide grooves, 102 deflector rods, 103 driven parts, 1031 first limiting components, 1032 second limiting components and 104 second driving components;
fig. 6-7: 52 slide bar assembly, 73 third drive assembly.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In the distillation process, the pipe orifice of the steam pipe is required to extend into the bottom of the digestion pipe, and in the Kjeldahl nitrogen determination instrument in the prior art, the position of the steam pipe is fixed, so that in the process of loading the steam pipe into the digestion pipe, the digestion pipe is required to be manually taken and moved from bottom to top, and the steam pipe can extend into the digestion pipe; meanwhile, the tube seat is arranged in the Kjeldahl nitrogen determination instrument in the prior art, and the motion of the digestive tube from bottom to top is blocked by the tube seat, so that when the Kjeldahl nitrogen determination instrument in the prior art is installed in the digestive tube, a user needs to bend the steam tube outwards by a certain angle by one hand, and the other hand is used for removing the chemical tube, and then the steam tube is penetrated into the digestive tube first and then inserted into the Kjeldahl nitrogen determination instrument along the oblique upper direction. Then one hand is used for righting the digestive tract, and the other hand is used for controlling the locking mechanism to lock the digestive tract, so that the bottleneck of the digestive tract is tightly attached to the distillation head, and a reliable seal is formed. During sampling, a user is required to loosen the locking mechanism by one hand and take out the digestive tract along the inclined lower part by the other hand.
The tilting operation makes the sample inside the digestion tube easily spilled out when the digestion tube is put in and taken out, and the tilting mode is unfavorable for sealing installation, thereby causing leakage. Some Kjeldahl nitrogen determination instruments design the tube seat into a movable structure, so that the inclination angle can be reduced to a certain extent, and the situation can be relieved only without being completely solved.
Embodiment one:
as shown in fig. 1 to 5, the kjeldahl distillation system for automatically connecting and disconnecting a stationary state digestion tube, comprises:
the steam sliding table group comprises an evaporation sliding block movably connected to the fixed plate, the evaporation sliding block is connected with a distillation head, the distillation head is connected with a vertically arranged steam pipe, and the evaporation sliding block drives the distillation head and the steam pipe to vertically move;
the splash-proof sliding table group comprises a splash-proof sliding block movably connected to the fixed plate, and the splash-proof sliding block is used for fixing the splash-proof bottle and driving the splash-proof bottle to move to a space above the distillation head and coincide with the axis of the distillation head;
the tube seat is used for placing the digestion tube, is positioned in the space below the distillation head and coincides with the axis of the distillation head.
As shown in fig. 1, the support 1 is used for bearing the weight of a steam slide table group and a splash-proof slide table group, the digestion tube 2 is used for containing a sample to be distilled after digestion, the sealing of a tube orifice is completed through the cooperation with the lower surface of the distillation head 4, the tube seat 3 is used for placing the digestion tube 2, the distillation head 4 introduces steam into the digestion tube 2, the upper surface of the distillation head 4 is matched with the splash-proof bottle 8 to realize sealing, and the evaporation slide block 5 is used for driving the distillation head 4 to move.
As shown in fig. 2, the steam sliding table group comprises a first driving component 7 and a guiding component 51 which are connected to a fixed plate 10, a power output end of the first driving component 7 is connected with a vertically arranged linear motion module, an evaporation sliding block 5 is arranged on the linear motion module, the evaporation sliding block 5 is connected with a distillation head 4, a sealing ring 41 which is matched with a splash-proof bottle 8 is arranged on the upper surface of the distillation head 4, another sealing ring which is matched with a digestion tube 2 is arranged on the lower surface of the distillation head 4, a steam interface 42, a distillation outlet and a steam tube 43 are arranged on the distillation head 4, the steam tube 43 is vertically arranged in a space below the distillation head 4, the top is communicated with the steam interface 42, external steam enters the steam tube 43 through the steam interface 42, the sample in the digestion tube 2 is heated and distilled through an opening at the bottom end of the steam tube 43, and ammonia steam generated by distillation is led out through the distillation outlet to a subsequent condensation unit for subsequent treatment.
The linear motion module converts the rotary motion generated by the first driving component 7 into linear motion, for example, the linear motion can be a ball screw 6, and the first driving component 7 is used for driving the ball screw 6 to rotate so as to drive the evaporation sliding block 5 to ascend or descend; a screw or the like may be used, and a ball screw is preferably selected in consideration of the control accuracy.
The first driving assembly 7 drives the ball screw 6 to rotate, and the evaporation slide 5 is driven by the ball screw 6 and drives the distillation head 4 and the steam pipe 43 to move in the vertical direction under the guiding action of the guiding assembly 51.
The tube seat 3 is provided with a positioning groove for accommodating the digestion tube 2, the digestion tube 2 is placed on the tube seat 3, the steam tube 43 is extended into the digestion tube 2 by the evaporation sliding block 5 or is taken out from the digestion tube 2, and the way of obliquely installing or taking out the digestion tube in the prior art is not used any more; simultaneously, the evaporation slide block 5 enables the distillation head 4 to be matched with the digestion tube 2 along the vertical direction, which is beneficial to the sealing effect.
The guide assembly 51 is not limited to a specific structural type. In this embodiment, the guide assembly 51 is in the form of a guide rail, as shown in fig. 2, including a guide groove connected to the evaporation slider 5 and a guide rail fitted to the guide groove, the guide rail being arranged in a vertical direction and connected to the bracket 1. When the first driving unit 7 drives the ball screw 6 to rotate, the evaporation slider 5 is pushed by the rotating ball screw 6, and the evaporation slider 5 is prevented from rotating by the structure of the guide unit 41 so as to be movable (vertically) in the direction in which the axis of the ball screw 6 is located.
The first driving member 7 is not limited to a specific structural type. In this embodiment, the first driving member 7 is a synchronous belt driven motor, the driven wheel is connected with one end of the ball screw 6, the output shaft of the motor is connected with the driving wheel, the driving wheel and the driven wheel are connected through a synchronous belt (which may be any form such as a flat machine belt, a triangle belt or a toothed belt, etc., in fig. 2), the motor is fixed on the base, and the base is connected with the bracket 1.
As shown in fig. 3-5, the splash-proof sliding table group comprises a fixed plate 10 connected with the bracket 1, a splash-proof sliding block 9 is movably connected on the fixed plate 10, one side of the splash-proof sliding block 9 is connected with a splash-proof bottle 8, the other side of the splash-proof sliding block is connected with a first guide rail 91, the splash-proof bottle 8 is arranged along the vertical direction, the bottom end of the splash-proof sliding table group is a pipe orifice, and the top end of the splash-proof sliding table group is detachably connected with an end cover 81.
The first guide rail 91 is arranged in the horizontal direction and is provided with a first slider 911 in sliding connection, the first slider 911 is connected to the first base 93, the first base 93 is connected to a second slider 921, the second slider 921 is in sliding connection with the second guide rail 92, the second guide rail 92 is arranged vertically and connected to the second base 94, and the second base 94 is connected to the fixing plate 10.
In this structure, the second guide rail 92, the second base 94 and the fixing plate 10 are all fixedly connected to the bracket 1, and when the second slider 921 moves, the first base 93, the first slider 911, the first guide rail 91 and the splash proof slider 9 can be driven to move in the vertical direction, so that the initial position can be finely adjusted before the splash proof bottle 8 is mounted and matched with the distillation head 4, and the sealing effect is ensured.
When the first slider 911 is fixed, the first guide rail 91 moves along the horizontal direction together with the splash-proof slider 9, so that the splash-proof bottle 8 driven by the splash-proof slider 9 can be finely adjusted in horizontal position before being matched with the distillation head 4 in an installation manner, and the sealing effect is ensured.
The fixed plate 10 is provided with a guide groove 101, one side of the fixed plate 10 is connected with a second driving component 104, the other side is provided with a deflector rod 102, the power output end of the second driving component 104 passes through the fixed plate 10 and is connected with one end of the deflector rod 102, the other end of the deflector rod 102 is provided with a hole, a driven piece 103 is arranged in the hole, and the driven piece 103 sequentially passes through the hole at the other end of the deflector rod 102, the guide groove 101 and the first guide rail 91 and then is connected with the splash-proof sliding block 9.
The guide groove 101 includes a vertical groove and a horizontal groove connected together at one end, and both arc transitions.
The hole on the shift lever 102 may be a waist-shaped hole or a bar-shaped hole, and the waist-shaped hole is selected in this embodiment.
The follower 103 may be a roller bearing or a shaft connected to one end of the first rail 91, on which a roller is sleeved, and the outer surface of the roller is movably connected with a sleeve.
In the above structure, the second driving component 104 drives one end of the shift lever 102 to rotate, the other end of the shift lever 102 moves in an arc, the arc movement is performed in the guide groove 101, the follower 103 passes through the hole of the shift lever 102 and is driven by the shift lever 102, the splash proof slider 9 is guided to move along the direction of the guide groove 101, and when the guide groove 101 comprises a vertical groove and a horizontal groove in arc transition, the splash proof slider 9 is driven by the follower 103, the movement in the horizontal direction is guided by the first guide rail 91, and the movement in the vertical direction is guided by the second guide rail 92.
When distillation is finished, the splash-proof sliding block 9 drives the splash-proof bottle 8 to rise and then translate, and arc transition is arranged between the rise and the translation, and the splash-proof bottle 8 is separated from the sealing ring 41 on the distillation head 4 firstly and then translates for a distance, so that enough space is reserved for the rising movement of the steam pipe 43 carried by the distillation head 4, the steam pipe 43 is completely exposed in the space above the digestion pipe 2, and the inspection, cleaning and replacement of the steam pipe 43 and the distillation head 4 are facilitated.
And the action of filling the splash-proof bottle 8 is opposite to the process, and the splash-proof slider 9 drives the splash-proof bottle 8 to translate to the position which is right above the distillation head 4 and coincides with the axis of the digestion tube 2, and then descends to finish sealing.
The side of the fixing plate 10 connected with the second driving assembly 104 is provided with a first limit assembly 1031 and a second limit assembly 1032. The first limiting component 1031 is located at the beginning of the guiding slot 101, and the second limiting component 1032 is located at the end of the guiding slot 101, for limiting the rotation angle of the second driving component 104.
The specific structure of the limiting assembly is not limited, the specific structure of the second driving assembly 104 is also not limited, and the second driving assembly 104 in this embodiment is directly driven by a motor, that is, an output shaft of the motor is directly connected with one end of the shift lever 102, and any structural type such as gear transmission, worm gear transmission and the like can be selected according to actual power requirements, so as to meet different transmission ratio requirements.
The stand 1 is connected to the fixing plate 10, so that the weight of the steam slide group and the splash slide group is transferred to the stand 1 via the fixing plate 10.
The working process is as follows:
sample injection (digestion completed into distillation process): after the digestion tube 2 is placed on the tube seat 3, the distillation head 4 moves downwards from the highest point under the drive of the evaporation sliding block 5, the steam tube 43 firstly penetrates into the digestion tube 2, and then the distillation head 4 is attached to the digestion tube 2 to finish sealing of the digestion tube 2;
under the drive of the splash-proof sliding block 9, the splash-proof bottle 8 firstly moves horizontally in the direction close to the digestion tube 2 until reaching the position right above the digestion tube 2, at this time, the axis of the splash-proof bottle 8 coincides with the axis of the digestion tube 2 (if not coincides, the splash-proof bottle is finely adjusted through the first sliding block 911 under the support of the first guide rail 91), then moves downwards, the bottle mouth of the splash-proof bottle 8 is matched with the sealing ring 41 on the distillation head 4 to finish the sealing of the splash-proof bottle (if the matching is not ideal, the problem of the splash-proof bottle in the initial position in the vertical direction is illustrated, the splash-proof bottle is finely adjusted through the second sliding block 921 under the support of the second guide rail 92, and the adjustable stroke is influenced by the length of the waist-shaped hole on the deflector 102. At this time, the digestion tube 2 and the splash bottle 8 are sealed by the sealing group on the distillation head 4, and distillation can be started.
Sampling (sample taken after distillation): the splash-proof bottle 8 moves upwards under the drive of the splash-proof sliding block, at the moment, the bottle mouth of the splash-proof bottle 8 is separated from the sealing ring 41, and then the translational motion is far away from the digestion tube 2 and the distillation head 4, so that enough space is reserved for the rising of the distillation head 4, and after the completion, the distillation head 4 moves upwards under the drive of the steam sliding block 5, and the separation of the distillation head 4 and the digestion tube 2 and the retraction of the steam tube 43 are completed. At this time, the steam pipe 43 and the distillation head 4 are completely retracted into the Kjeldahl apparatus, and the sampling operation can be completed by only removing the digestion tube 2 from the tube seat 3.
Embodiment two:
as shown in fig. 6, in the distillation system in this embodiment, the first driving component 7 is of a motor direct-drive structure, that is, an output shaft of the motor is connected with one end of the ball screw 6 to drive the ball screw 6 to rotate, and the other end of the ball screw 6 is movably connected to a fixed block of the bracket 1 through a bearing.
In this embodiment, the guide assembly 51 of the guide rail type in the first embodiment is replaced by the slide rod assembly 52, the slide rod assembly 52 includes slide rod bodies arranged on two sides of the ball screw 6 in parallel, one end of the slide rod body is connected with the housing of the first driving assembly 7, the other end of the slide rod body is connected to the fixed block of the bracket 1, the evaporation slide block 5 passes through the two groups of slide rod bodies and the ball screw 6, when the ball screw 6 rotates to drive the evaporation slide block 5 to ascend or descend, the two groups of slide rod bodies block the rotation of the evaporation slide block 5, and the slide rod assembly 52 has the same function as the guide assembly 51 of the guide rail type in the first embodiment, and both functions are guiding the movement direction of the evaporation slide block 5.
In this embodiment, the first guide rail 91 and the second guide rail 92 in the splash-proof sliding table set are replaced with guide shafts, the shapes of the first base 93 and the second base 94 are correspondingly changed to be matched with the types of the guide shafts, and correspondingly, the first slider 911 and the second slider 921 are replaced with structural types capable of moving along the guide shafts, so that the same effect as in the first embodiment is produced.
Embodiment III:
as shown in fig. 7, in the distillation system in this embodiment, the ball screw 6 is driven to rotate by the direct driving mode of the steam sliding table set selection motor, so as to push the evaporation sliding block 5 to move vertically, and the slide bar assembly 52 (the slide bar assembly 52 has the same function as the guide assembly 51 in the first embodiment) capable of guiding the direction of the evaporation sliding block 5 is matched, unlike the first embodiment, the lower surface of the evaporation sliding block 5 is connected with the top end of the steam pipe 43, so as to realize automatic lifting of the steam pipe 43, the opening of the end cover 81 of the splash-proof bottle 8 is opened, the pipe orifice at the bottom end is detachably connected with the distillation head 4, and the steam pipe 43 penetrates from the opening of the end cover 81 and then reaches the inside of the digestion pipe 2 through the distillation head 4, so that the axes of the splash-proof bottle 5, the distillation head 4 and the digestion pipe 2 are overlapped.
In the splash-proof sliding table set, a deflector 102 driven by a second driving assembly 104, a matched driven piece 103, two sets of limiting assemblies and a guide groove 101 are omitted, a first guide rail 91 capable of horizontally moving, a matched first sliding block 911 and a corresponding base are omitted, the second guide rail 92 and a second sliding block 921 are replaced by a third driving assembly 73 and a linear movement module, so that the splash-proof bottle 8 does not realize circular arc movement of vertical and translational movement through the second driving assembly 104 and the deflector 102, fine adjustment in the horizontal direction is not realized, an end cover 81 at the top end of the splash-proof bottle 8 is changed into a structure with an opening, one end of a steam pipe 43 is connected with a steam sliding block 5 and sequentially passes through the splash-proof bottle 8, a distillation head 4 and the digestion pipe 2, and meanwhile the distillation head 4 is pre-installed on the splash-proof bottle 8, and the splash-proof sliding table set realizes automatic lifting of the splash-proof bottle 8 on the same axis while the steam sliding table set realizes automatic lifting of the steam pipe 43.
Specific:
as shown in fig. 7, the stand 1 is connected to the fixing plate 10, and both the steam slide group and the splash slide group are mounted on the fixing plate 10.
The steam sliding table group comprises an evaporation sliding block 5 movably connected to the fixed plate 10, the evaporation sliding block 5 is connected with the top end of a vertically arranged steam pipe 43, the steam pipe 43 sequentially passes through the splash-proof bottle 8 and the distillation head 4 to reach the digestion pipe 2, and the evaporation sliding block 5 drives the steam pipe 43 to vertically move;
the splash proof sliding table group comprises a third driving assembly 73 connected with the fixing plate 10, the third driving assembly 73 is connected with a linear motion module, a splash proof sliding block 9 is arranged on the linear motion module, the splash proof sliding block 9 is used for connecting a splash proof bottle 8, an end cover 81 of the splash proof bottle 8 is provided with a hole, a steam pipe 43 sequentially penetrates through the hole of the end cover 81, the distillation head 4 and the digestion tube 2 and is positioned on the same axis, the rotary motion of the third driving assembly 73 is converted into linear motion through the linear motion module, and the splash proof bottle 8 is driven to realize vertical motion in the direction of the same axis with the digestion tube 2.
The third driving assembly 73 in this embodiment is not limited to a specific structure type, and may be a motor direct drive or a synchronous belt drive, and any existing structure, and the linear motion module may be a ball screw or a screw, and is provided with a slide bar or a guide rail for preventing the ball screw from rotating.
According to the structure, the cleaned steam pipe 43 is arranged on the evaporation slide block 5 in advance, the steam pipe 43 penetrates through the opening of the end cover 81 at the top end of the splash-proof bottle 8, the splash-proof bottle 8 provided with the distillation head 4 in advance is arranged on the splash-proof slide block 9, and as the lifting movement of the steam slide block group and the splash-proof slide block group are in axis coincidence, the process of adjusting the horizontal position of the splash-proof bottle 8 in the first embodiment is not needed any more, the lifting stroke of the splash-proof slide block group is only needed to be adjusted according to the sealing condition of the distillation head 4 and the digestion pipe 2, and the automatic sample feeding and sampling of distillation operation can be completed after the adjustment is completed, so that the structure is simpler.
During the sample introduction of the distillation operation: after the digestion tube 2 is placed on the tube seat 3, the steam tube 43 moves downwards under the drive of the evaporation slide block 5, the splash-proof bottle 8 moves downwards under the drive of the splash-proof slide block 9, and the movement of the two is synchronous or asynchronous (depending on the specification of the digestion tube 2 and the length of the steam tube 43), the steam tube 43 stretches into the digestion tube 2, and continues to move downwards until the lower surface of the distillation head 4 is attached to the digestion tube 2 to finish the sealing of the digestion tube 2, so that distillation can be started.
During sampling of the distillation operation: the splash-proof bottle 8 ascends under the drive of the splash-proof sliding block, the separation and the retraction actions of the splash-proof bottle 8 and the distillation head 4 and the digestion tube 2 are completed, the movements of the splash-proof bottle 8 and the distillation head 4 and the digestion tube 2 can be synchronous or asynchronous, at the moment, the steam tube 43, the distillation head 4 and the splash-proof bottle 8 are all received in the Kjeldahl nitrogen analyzer, and at the moment, the sampling action can be completed only by taking down the digestion tube 2 from the tube seat 3.
Embodiment four:
the working method of the distillation system based on any one of the first, second or third embodiments comprises the following steps:
and (3) entering a distillation process after digestion: the digestion tube is placed on the tube seat, the distillation head is driven by the evaporation sliding block to move along the vertical direction and drive the steam tube to penetrate into the digestion tube until the distillation head and the digestion tube are matched to finish sealing of the digestion tube;
the splash-proof bottle is driven by the splash-proof sliding block to horizontally move towards the direction close to the digestion tube, and then moves to the position right above the digestion tube along the vertical direction until the bottle mouth of the splash-proof bottle is matched with the distillation head to finish sealing of the splash-proof bottle, and distillation is started;
taking out the sample after distillation: the splash-proof bottle moves vertically under the drive of the splash-proof sliding block, so that the bottle mouth of the splash-proof bottle is separated from the distillation head, then moves horizontally away from the digestion tube and the distillation head, the distillation head moves vertically under the drive of the steam sliding block, separation of the distillation head and the digestion tube and retraction of the steam tube are completed, and the digestion tube is taken out;
or (b)
And (3) entering a distillation process after digestion: after the digestion tube is placed on the tube seat, the steam tube moves in the vertical direction under the drive of the evaporation slide block, the splash-proof bottle moves in the vertical direction along the same axis under the drive of the splash-proof slide block, so that the steam tube stretches into digestion until the distillation head is matched with the digestion tube, and distillation is started;
taking out the sample after distillation: the splash-proof bottle moves along the vertical direction under the drive of the splash-proof sliding block, the steam pipe moves along the vertical direction under the drive of the evaporation sliding block, the separation and the retraction of the splash-proof bottle, the distillation head and the digestion pipe are completed, and the digestion pipe is taken out.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Kai's distillation system for automatically connecting and separating a digestion tube in a stationary state, comprising:
the steam sliding table group comprises an evaporation sliding block movably connected to the fixed plate, the evaporation sliding block is connected with a distillation head, the distillation head is connected with a vertically arranged steam pipe, and the evaporation sliding block drives the distillation head and the steam pipe to vertically move;
the splash-proof sliding table group comprises a splash-proof sliding block movably connected to the fixed plate, and the splash-proof sliding block is used for fixing the splash-proof bottle and driving the splash-proof bottle to move to a space above the distillation head and coincide with the axis of the distillation head;
the tube seat is used for placing the digestion tube, is positioned in the space below the distillation head and coincides with the axis of the distillation head.
2. The kjeldahl distillation system for automatically connecting and disconnecting a digestive tract in a stationary state according to claim 1, wherein the steam slipway group comprises a first driving component connected on a fixed plate, a power output end of the first driving component is connected with a vertically arranged linear motion module, an evaporation slide block is arranged on the linear motion module, the rotary motion of the first driving component is converted into linear motion through the linear motion module, and the evaporation slide block is driven to drive the distillation head and the steam tract to vertically move.
3. The kjeldahl distillation system for automatically connecting and disconnecting a digestive tract in a static state as claimed in claim 1, wherein a sealing ring matched with a splash-proof bottle is arranged on the upper surface of the distillation head, another sealing ring matched with the digestive tract is arranged on the lower surface of the distillation head, a steam interface, a distillation outlet and a steam pipe are arranged on the distillation head, the steam pipe is vertically arranged in a space below the distillation head, and the top of the steam pipe is communicated with the steam interface.
4. The kjeldahl distillation system for automatically connecting and disconnecting a stationary state of a digestive tract according to claim 1, wherein the splash proof sliding table group comprises splash proof sliding blocks movably connected on a fixed plate, one side of each splash proof sliding block is used for connecting a splash proof bottle, the other side of each splash proof sliding block is connected with a first guide rail, the first guide rail is slidingly connected with the first sliding block, the first sliding block is connected with a first base, the first base is connected with a second sliding block, the second sliding block is slidingly connected with a second guide rail, the second guide rail is vertically arranged and connected with a second base, and the second base is connected with the fixed plate.
5. The kjeldahl distillation system for automatically connecting and disconnecting a stationary digestion vessel according to claim 1, wherein the splash guard is arranged in a vertical direction, the bottom end is a pipe orifice, and the top end is detachably connected with an end cover.
6. The kjeldahl distillation system for automatically connecting and disconnecting a digestive tract in a stationary state according to claim 4, wherein the fixed plate is provided with a guide groove, one side of the fixed plate is connected with the second driving component, the other side of the fixed plate is provided with a deflector rod, the power output end of the second driving component passes through the fixed plate and is connected with one end of the deflector rod, the other end of the deflector rod is provided with a hole, a driven member is arranged in the hole, and the driven member sequentially passes through the hole at the other end of the deflector rod, the guide groove and the first guide rail and then is connected with the splash-proof sliding block.
7. The kjeldahl distillation system for automatically connecting and disconnecting a stationary digestive tract as in claim 6 wherein the guideway comprises a vertical trough and a horizontal trough connected together at one end, the vertical trough and the horizontal trough having a circular arc transition.
8. The kjeldahl distillation system for automatically connecting and disconnecting a digestive tract in a stationary state as claimed in claim 1, wherein the steam slipway group comprises an evaporation slide block movably connected on a fixed plate, the evaporation slide block is connected with the top end of a vertically arranged steam tract, the steam tract sequentially passes through a splash-proof bottle and a distillation head to reach the digestive tract, and the evaporation slide block drives the steam tract to vertically move.
9. The kjeldahl distillation system for automatically connecting and disconnecting a digestive tract in a stationary state according to claim 8, wherein the splash-proof sliding table group comprises a third driving component connected with a fixed plate, the third driving component is connected with a linear motion module, a splash-proof sliding block is arranged on the linear motion module and used for connecting a splash-proof bottle, an opening of an end cover of the splash-proof bottle is provided, a steam pipe sequentially penetrates through the opening of the end cover, the distillation head and the digestive tract and is positioned on the same axis, and the rotary motion of the third driving component is converted into linear motion through the linear motion module to drive the splash-proof bottle to realize vertical motion in the direction of the same axis with the digestive tract.
10. A method of operating a kjeldahl distillation system based on the automatic connection and disconnection of a stationary digestive tract according to any one of claims 1 to 9, comprising the steps of:
and (3) entering a distillation process after digestion: the digestion tube is placed on the tube seat, the distillation head is driven by the evaporation sliding block to move along the vertical direction and drive the steam tube to penetrate into the digestion tube until the distillation head and the digestion tube are matched to finish sealing of the digestion tube;
the splash-proof bottle is driven by the splash-proof sliding block to horizontally move towards the direction close to the digestion tube, and then moves to the position right above the digestion tube along the vertical direction until the bottle mouth of the splash-proof bottle is matched with the distillation head to finish sealing of the splash-proof bottle, and distillation is started;
taking out the sample after distillation: the splash-proof bottle moves vertically under the drive of the splash-proof sliding block, so that the bottle mouth of the splash-proof bottle is separated from the distillation head, then moves horizontally away from the digestion tube and the distillation head, the distillation head moves vertically under the drive of the steam sliding block, separation of the distillation head and the digestion tube and retraction of the steam tube are completed, and the digestion tube is taken out;
or (b)
And (3) entering a distillation process after digestion: after the digestion tube is placed on the tube seat, the steam tube moves along the vertical direction under the drive of the evaporation slide block, the splash-proof bottle moves along the vertical direction of the same axis under the drive of the splash-proof slide block, so that the steam tube stretches into the digestion tube until the distillation head is matched with the digestion tube, and distillation is started;
taking out the sample after distillation: the splash-proof bottle moves along the vertical direction under the drive of the splash-proof sliding block, the steam pipe moves along the vertical direction under the drive of the evaporation sliding block, the separation and the retraction of the splash-proof bottle, the distillation head and the digestion pipe are completed, and the digestion pipe is taken out.
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| CN202311160365.6A CN117180773B (en) | 2023-09-08 | 2023-09-08 | Kai's distillation system and method for automatically connecting and separating digestion tubes in static state |
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| CN202311160365.6A CN117180773B (en) | 2023-09-08 | 2023-09-08 | Kai's distillation system and method for automatically connecting and separating digestion tubes in static state |
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