CN216434011U - Automatic injector of gas chromatograph - Google Patents

Abstract

The utility model relates to an automatic appearance ware of annotating of gas chromatograph, it includes a base and is fixed in rotatable and the first pole setting of stretching out and drawing back from top to bottom on the base, be fixed with the appearance bottle mounting disc that is used for placing the appearance bottle in the first pole setting, the first pole setting and the scalable arm of appearance bottle mounting disc top are connected, the free end of scalable arm can be fixed with the notes appearance needle that is used for advancing the appearance, the import of annotating the appearance needle is through first pipeline and power device's exit linkage, power device's import is through the exit linkage of second pipeline and air supply or lotion storage tank, the rotation and the upper and lower flexible operation of first pole setting, the flexible operation of scalable arm and the opening and close of power device are through total control platform control. The utility model discloses an automatic injector of gas chromatograph realizes annotating high-efficient, the quick washing and the rinse of appearance needle, raises the efficiency, saves time.

Description

Automatic injector of gas chromatograph

Technical Field

The utility model belongs to the gas chromatography field, concretely relates to automatic injector of gas chromatograph.

Background

Gas chromatography is one of the most common separation and analysis means in a laboratory at present, when GC (gas chromatography) gas chromatography analysis is carried out in the laboratory at present, due to the fact that a plurality of different samples exist, manual operation is needed during injection, the sample injection period at one time is about 30min-45min, manpower and time are consumed for injecting samples at intervals, and a specially-assigned person is needed for injecting samples, starting analysis, stopping analysis, processing a map and exporting reports. At present, an automatic sample injector used in a laboratory is complex in design, when sample injection is carried out, the needle head is complex to clean and rinse, the needle head is not easy to accurately align at a sample injection port, the driving force of the automatic sample injector is insufficient, the analysis procedure is complex, and errors are easy to occur.

When GC gas chromatography analysis is carried out, the situation that a trace sample injector is easily damaged due to uneven force of artificial sample injection exists, and if the sample injection speed is slowed down, the trace deviation of results is easily caused due to even force of artificial sample injection. The existing method for improving the efficiency is to process the previously derived result and derive an analysis report when injecting samples and starting analysis, and the whole analysis time is prolonged because the operator cannot inject samples immediately when the chromatograph is ready when other tasks are performed.

Only a micro-injector is used in gas chromatography, which consumes labor and time. To achieve automatic continuation, a specially-made and complex GC headspace injector is purchased.

SUMMERY OF THE UTILITY MODEL

To the problem that automatic injector appears among the prior art, the utility model provides a simple, the convenient operation's of design automatic injector.

The utility model discloses an automatic appearance ware of annotating of gas chromatograph, it includes a base and is fixed in rotatable and the first pole setting of upper and lower flexible on the base, be fixed with the appearance bottle mounting disc that is used for placing the appearance bottle in the first pole setting, the first pole setting and the scalable arm of appearance bottle mounting disc top are connected, the free end of scalable arm is fixed with the notes appearance needle that is used for the appearance of introduction, the import of annotating the appearance needle is through the exit linkage of first pipeline with power device, power device's import is through the exit linkage of second pipeline with air supply (for example can be nitrogen gas or argon gas) or lotion storage tank (for example can be the methyl alcohol storage tank), the rotation and the upper and lower flexible operation of first pole setting, the flexible operation of scalable arm and power device open and close through total control platform (for example can be the computer) chain control.

Furthermore, first pole setting is including being fixed in the first sleeve on the base and standing in first sleeve and reciprocating and rotatable dwang along first sleeve inner wall, and the dwang is through setting up the hydraulic press drive in first sleeve oscilaltion in first sleeve, and drives the rotation through the rotating electrical machines that sets up in first sleeve. Preferably, a support (for example, the support may be a support rod or a support plate crossing the inside of the first sleeve) is arranged inside the first sleeve, a rotating motor (preferably, a small or micro rotating motor) is fixed on the support, a hydraulic press (preferably, a small or micro hydraulic press) is fixed above the rotating motor, a rotating shaft of the rotating motor is directly and fixedly connected with the hydraulic press, a rotating rod is fixed above the hydraulic press, the hydraulic press is driven by the rotating motor to rotate, and further can drive the rotating rod to rotate, the hydraulic machine is a common hydraulic system and comprises a hydraulic pump, a hydraulic motor, a hydraulic oil cylinder and a push rod (an actuating mechanism), the push rod can push the rotating rod to lift up and down, the top of the rotating rod is connected with a telescopic mechanical arm, the telescopic mechanical arm can rotate along with the rotating rod, and the rotating motor and the hydraulic machine can be connected with a main control table (for example, a computer) through a lead.

The height of the first sleeve is 30-60cm, the height of the rotating rod is 10-20cm, the adjustable height of the rotating rod can be 5-10cm, the adjustable height of the first upright is determined by the height of the gas chromatograph, the height of the first upright is larger than the height of the gas chromatograph, and the height of the first upright can be 40-80 cm.

Further, the rotating electrical machines can be step motor for example, be fixed with angle sensor on the rotation axis of rotating electrical machines, angle sensor is connected with total control board (for example can be the computer), the angle of rotating electrical machines rotation axis pivoted is carried to total control board through angle sensor, and then the rotation angle of the first pole setting of control, because sample bottle evenly distributed on the outer fringe of sample bottle mounting disc, the central angle between the adjacent sample bottle is unanimous, total control board sets up the rotation angle parameter of rotating electrical machines rotation axis, the angle that is used for controlling the rotating electrical machines rotation axis at every turn is the integral multiple of central angle between the adjacent sample bottle, guarantee that the accurate suction of notes appearance needle or discharge appearance liquid.

Further, the sample bottle mounting plate may be, for example, a solid disc, and holes (the diameter of the mouth of the sample bottle is larger than the diameter of the hole) for placing the sample bottle are formed in the disc (preferably, on the outer edge), the holes are preferably uniformly distributed along the outer edge of the sample bottle mounting plate, the number of the holes may be, for example, 12 to 20, or the sample bottle mounting plate may be, for example, a hollow annular plate, and the annular plate is formed with holes for placing the sample bottle, preferably uniformly distributed, the number of the holes may be, for example, 12 to 20, the annular plate is connected to the first sleeve via a connecting rod, and the diameter of the sample bottle mounting plate may be, for example, 40 to 60 cm.

Further, the first vertical rod penetrates through the center of (e.g. preferably vertically) the sample bottle mounting plate, and the first sleeve of the first vertical rod is fixedly connected with the sample bottle mounting rotary disk.

Furthermore, the telescopic mechanical arm comprises a second sleeve fixedly connected with the first upright post and a telescopic rod extending into the second sleeve and sliding along the inner wall of the second sleeve, a telescopic double-section hydraulic arm is fixed in the second sleeve, a first section arm of the hydraulic arm is fixed in the second sleeve and is connected with a controller for controlling the hydraulic arm to stretch, a second section arm stretching along the axial direction of the first section arm is connected with the telescopic rod and is used for controlling the movement of the telescopic rod, the controller is used for receiving an electric signal and controlling the telescopic movement of the second section arm along the axial direction of the first section arm, the controller is connected with a main control platform (such as a computer) through a lead, preferably, the telescopic mechanical arm is fixedly connected with the first upright post vertically, the maximum length of the telescopic mechanical arm is consistent with the radius of the sample bottle mounting plate, so that the sample injection is directed at the center of the sample bottle, and the minimum length is the distance between the sample injection port and the first upright post, so that the sample injection needle is aligned with the center of a sample injection port of a fixing bolt in the gas chromatograph.

Furthermore, the one end that the first pole setting was kept away from to the telescopic link is opened has the hole that supplies to annotate the appearance needle and run through, and the inside recess that is used for fixed spring that opens respectively of telescopic link of hole both sides, and the free end of spring is fixed with towards annotating the arc of appearance needle and supports the board, annotates the appearance needle and advances the hole back, and the spring is in compression state, and two support the board under the effect of spring and block annotate the appearance needle.

Furthermore, a second vertical rod is fixed on the base, the distance between the second vertical rod and the first vertical rod can be larger than the radius of the sample bottle mounting disc, the height of the second vertical rod is larger than that of the first vertical rod, for example, by 10-15cm, a power device is fixed on the second vertical rod, a second pipeline is connected with the power device along the second vertical rod, the first pipeline is connected with an inlet of the sample injection needle after passing through the top end of the second vertical rod, and the first pipeline between the top end of the second vertical rod and the inlet of the sample injection needle is spiral.

Further, a cylindrical fixer for sleeving the needle head is fixed at the bottom end of the needle cylinder of the sample injection needle, axial narrow hollows are formed in the fixer, the axial length of each narrow hollow is 7/10-9/10 of the length of the fixer, the width of each narrow hollow is 1/20-1/25, the number of the narrow hollows is 5-8, the outer diameter of the fixer is consistent with the outer diameter of the needle cylinder of the sample injection needle, the length of the fixer can be 50-54mm, the narrow hollows are uniformly distributed on the fixer, the fixer is made of PE, PVC or PP, preferably PE, and the narrow hollow structure of the fixer enables the fixer to rebound and restore after being extruded, or can automatically restore when the fixer rotates slightly (for example, the rotation angle is 2-5 degrees).

Furthermore, the bottom end of the fixer is fixed with an anastomat which is complementary with a fixing bolt of a sample injection port of a gas chromatograph, the fixing bolt of the sample injection port is of a columnar structure with straight teeth on the periphery, the straight teeth are uniformly distributed on the outer wall of the columnar structure, the adjacent straight teeth are spaced by a certain radian, the number of the straight teeth can be 6, for example, clamping grooves are formed between the adjacent straight teeth, an axial hole is formed in the center of the columnar structure, the sample injection port of the chromatograph is positioned in the axial hole, the anastomat is cylindrical, the anastomat comprises an anastomat wall and a plurality of vertical ribs which are arranged around the inner side of the anastomat wall, the width of the ribs is consistent with the width of the clamping grooves, the bottom of the ribs is of a beveling structure, the beveling structure enables the anastomat to realize rotary anastomosis under the action of the fixer when the anastomat is deviated, the anastomat is downwards aligned with the fixing bolt when the sample injection is carried out, so that a single rib is just clamped into the clamping groove of the fixing bolt, at the moment, the needle head of the sample injection needle is over against the sample injection port, the first upright rod is shortened and drives the sample injection needle to move downwards, the fixer is extruded and shortened, and the needle head enters the sample injection port to inject samples; the length of the anastomat can be 5-10mm, and the anastomat can be made of anticorrosive materials such as copper and stainless steel, and copper is preferred. The diameter of anastomat is unanimous with appearance bottle bottleneck diameter, when guaranteeing to absorb appearance liquid, the anastomat stops in appearance bottle outside, when absorbing appearance liquid, first pole setting shortens and drives and annotates the appearance needle and move down, the appearance bottle bottleneck is aimed at to the anastomat, the fixer receives the extrusion of anastomat and notes appearance needle cylinder and shortens, the centre is the form that expands, the syringe needle gets into appearance liquid bottle and absorbs the sample, inhale the appearance and accomplish the back, first pole setting extension drives and annotates the appearance needle and rise, the anastomat breaks away from appearance bottle bottleneck, the fixer resumes natural state.

Further, the injection needle comprises a syringe and a needle, the first pipeline is connected with the inlet of the syringe, and the length of the needle can be 60-70mm, for example.

Further, the first pipeline or the second pipeline is used for conveying liquid or gas, when a liquid phase system is adopted, liquid is conveyed in the first pipeline and the second pipeline, and a filtering membrane used for filtering the liquid is arranged on the second pipeline; when a gas phase system is adopted, gas is introduced into the first pipeline and the second pipeline, and a gas pressure valve for controlling the gas pressure is arranged on the second pipeline, such as an electromagnetic pressure reducing valve or a pressure limiting valve, and the electromagnetic pressure reducing valve or the pressure limiting valve is controlled by a master control console (such as a computer).

Preferably, the power device is a dual-purpose gas-liquid metering pump with a bidirectional function, the dual-purpose gas-liquid metering pump is fixed on a second vertical rod which is independently arranged with the first vertical rod, preferably fixed at the top end of the second vertical rod, and the power device is connected with a master control console (such as a computer) through a lead to control the operation of the dual-purpose gas-liquid metering pump.

Further, the base is of any shape, for example, the base can be square or round, preferably crescent, the concave part of the crescent base is aligned with the edge of the gas chromatograph, so that the sample injector is closer to the sample injection port, and the side of the base is provided with an interface connected with a master control console (for example, a computer).

Use the utility model discloses a method of annotating appearance is annotated to automatic injector of gas chromatograph:

use the utility model discloses an during automatic sample injector, be equipped with the looks concern sample procedure on the computer, set up relevant parameter and include opening of power device open the maximum length and the minimum length etc. of number of times, power device's activation time and closing time, the rotation angle parameter of rotating electrical machines rotation axis, the flexible relevant parameter of first pole setting, hydraulic press activation time and closing time, scalable arm.

Firstly, a sample bottle filled with sample liquid and an empty bottle (used as a waste liquid bottle) are placed on a sample bottle mounting disc (taking 12 holes on the sample bottle mounting disc as an example for explanation), the position of a base is manually adjusted so that the upper part of a sample injection port is just opposite to a connecting line between the center of the sample bottle mounting disc and the empty bottle, a rotating rod is manually adjusted to ensure that a sample injection needle is just opposite to the empty bottle, and the position is used as the initial position of the rotating rod.

When a liquid phase system is adopted

(1) And (3) a rinsing stage: the sample injection program is operated, the gas-liquid dual-purpose metering pump is started, methanol is automatically sucked to flush the sample injection needle, the number of flushing times is determined according to the starting and stopping times of the gas-liquid dual-purpose metering pump set by the program, flushing liquid enters an empty bottle, after the sample injection needle is flushed, the angle of each rotation of the rotating rod is controlled to be 30 degrees, 60 degrees, 120 degrees or 180 degrees through a background computer program, so that the sample injection needle is opposite to the upper part of the sample bottle, then the background computer program controls the hydraulic press to start, the first vertical rod is shortened, the sample injection needle enters the sample bottle, the background computer program controls the gas-liquid dual-purpose metering pump to start to suck sample liquid, after the suction is finished, the first upright stanchion is extended, the rotating pole is rotated to return to the initial position and the sample liquid is flushed into the empty bottle, the operation is repeated for 3 to 5 times, because the amount of methanol solution or sample solution required by each rinsing is very small, namely 1 mu L, even if the rinsing is carried out for many times, the capacity of one sample bottle can be used as a waste liquid bottle;

(2) a sampling stage: after rinsing is finished, the sample injection needle (rotating rod) stays at the initial position and rotates from the initial position, the rotating rod is controlled by a background computer program to rotate by 30 degrees, 60 degrees, 120 degrees or 180 degrees each time, the sample injection needle is consistent with the sample suction operation in the step (1) for the sample injection needle, and sample suction is finished;

(3) and (3) injecting a sample: after the sample is sucked, the telescopic mechanical arm is adjusted by a background computer program to be the distance between the sample injection port and the first vertical rod which is the minimum length, the control rotating rod rotates to the initial position, the sample injection needle is just opposite to the center of the sample injection port, the first vertical rod is shortened, the anastomat is just opposite to the fixing bolt of the sample injection port, the sample injection needle head is enabled to enter the sample injection port, the gas-liquid dual-purpose metering pump is started to inject the sample, after the sample injection is completed, the first vertical rod is extended, the telescopic mechanical arm is adjusted to be the maximum length, and the sample injection operation is continued to the position above a sample bottle in a rotating mode.

When gas phase system is adopted

And (3) a rinsing stage: and (3) operating a sample injection program, starting the gas-liquid dual-purpose metering pump, automatically sucking nitrogen to flush and sweep the sample injection needle, determining the flushing frequency according to the starting and stopping frequency of the gas-liquid dual-purpose metering pump set by the program, discharging gas into air or blowing the gas into an empty bottle, and performing the rest of operations as the same as those in the case of adopting a liquid phase system.

The utility model has the advantages that:

the special automatic sample injector for gas chromatography can continuously and automatically inject samples when gas chromatography is carried out, and can realize continuous and automatic sample injection and manpower liberation after batch samples to be detected are placed into the sample bottle mounting disc at one time; the special needle head anastomat can be perfectly matched with the fixing bolt at the sample injection port, so that the sample injection needle is accurately inserted into the sample injection port, and the accuracy and the efficiency of sample injection are greatly improved; and the gas or liquid flushing system realizes efficient and rapid cleaning and rinsing of the sample injection needle tube. After the automatic injector is put into use, the time of experimenters can be greatly saved, and all samples can be injected into the automatic injector and the spectrograms can be processed in batches after the analysis is finished, and an analysis report can be exported.

Drawings

Fig. 1 is a schematic diagram of the overall structure of an automatic injector for a gas chromatograph according to the present invention.

Fig. 2 is a top view of the automatic injector of the gas chromatograph of the present invention.

Fig. 3 is a structural schematic diagram of a needle head of the sample injection needle and the anastomat.

Fig. 4 is a perspective view of the structure of the holder.

FIG. 5 is a longitudinal cross-sectional view of the stapler.

Fig. 6 is a top view of the stapler.

Fig. 7 is a view showing a structure for fixing the sample injection needle.

Figure 8 is a schematic view of the structure of the first upright and the telescopic robot arm.

Fig. 9 is a schematic structural view of a fixing bolt of the sample injection port.

Fig. 10 is a block diagram of an analysis flow program using the automatic injector of the present invention.

Description of reference numerals:

1-a first upright post, 2-a sample bottle, 3-a sample bottle mounting plate, 4-a second pipeline, 5-a pneumatic valve, 6-a base, 7-a power device (a gas-liquid dual-purpose metering pump), 8-a telescopic mechanical arm, 9-a sample injection needle, 10-a sample injection port, 11-a gas chromatograph, 12-a connecting rod, 13-a first pipeline, 14-an angle sensor, 15-a second upright post, 16-a narrow hollow part, 17-a needle cylinder, 18-a first sleeve, 19-a rotating rod, 20-a rotating motor, 21-a hydraulic machine, 22-a lead wire, 23-a second sleeve, 24-a telescopic rod, 25-a first section arm, 26-a controller, 27-a second section arm, 28-a lead wire, 29-a support and 30-a fixer, 31-anastomat, 311-anastomat wall, 312-rib, 32-arc-shaped surface supporting plate, 33-spring and 34-needle head.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1-2, the automatic sample injector for gas chromatograph of the present invention comprises a base 6 and a first vertical rod 1 fixed on the base and capable of rotating and extending up and down, a sample bottle mounting plate 3 for placing a sample bottle 2 is fixed on the first vertical rod 1, the first vertical rod 1 above the sample bottle mounting plate 3 is connected with a telescopic mechanical arm 8, the free end of the telescopic mechanical arm 8 can be fixed with a sample injection needle 9 for sample injection, the inlet of the sample injection needle 9 is connected with the outlet of the power device 7 through a first pipeline 13, the inlet of the power device 7 is connected with the outlet of an air source (for example, nitrogen or argon) or a washing solution storage tank (for example, methanol storage tank) through a second pipeline 4, and the rotation and up-down telescopic operation of the first vertical rod 1, the telescopic operation of the telescopic mechanical arm 8 and the opening and closing of the power device 7 are controlled in an interlocking manner through a master control board (for example, a computer).

The first vertical rod 1 comprises a first sleeve 18 fixed on the base and a rotating rod 19 which is arranged in the first sleeve, moves up and down along the inner wall of the first sleeve and can rotate, the rotating rod 19 is driven by a hydraulic machine 21 arranged in the first sleeve to move up and down in the first sleeve, and the rotating rod is driven to rotate by a rotating motor 20 arranged in the first sleeve. Preferably, a support 29 (the support may be a support rod or a support plate crossing the inside of the first sleeve, for example) is arranged inside the first sleeve 18, a rotating motor 20 (preferably a small or micro rotating motor) is fixed on the support 29, a hydraulic machine 21 (preferably a small or micro hydraulic machine, for example) is fixed above the rotating motor 20, a rotating shaft of the rotating motor 20 is directly and fixedly connected with the hydraulic machine 21, a rotating rod 19 is fixedly connected above the hydraulic machine 21, the hydraulic machine 21 is driven by the rotating motor 20 to rotate, and then the rotating rod 19 can be driven to rotate, the hydraulic machine 21 is a common hydraulic system and comprises a hydraulic pump, a hydraulic motor, a hydraulic oil cylinder and a pushing rod (actuating mechanism), the pushing rod of the hydraulic machine can push the rotating rod 19 to move up and down, the top of the rotating rod 19 is connected with the telescopic mechanical arm 8, so that the telescopic mechanical arm 8 can rotate along with the rotating rod 19, the rotary motor 20 and the hydraulic machine 21 can be connected to a general control board (which may be a computer, for example) via wires (22).

The height of the first sleeve 18 can be 30-60cm, the height of the rotating rod 19 can be 10-20cm, the height of the rotating rod 19 can be adjusted to be 5-10cm, for example, the height of the first upright 1 can be adjusted to depend on the height of the gas chromatograph 11, the height of the first upright 1 is larger than the height of the gas chromatograph 11, and the height of the first upright 1 can be 40-80cm, for example. The vial mounting plate 3 is fixed to the first sleeve 18 of the first upright, and the vial mounting plate 3 may be fixed, for example, to the top of the first sleeve 18.

The rotating electrical machine 20 can be for example step motor, be fixed with angle sensor 14 on the rotation axis of rotating electrical machine 20, angle sensor 14 is connected with master control platform (for example can be the computer), rotating electrical machine rotation axis pivoted angle is carried to master control platform through angle sensor 14, and then the rotation angle of control first pole setting 1, because the sample bottle is evenly distributed on the outer fringe of sample bottle mounting disc, the central angle between the adjacent sample bottle is unanimous, master control platform sets up the rotation angle parameter of rotating electrical machine rotation axis, the angle that is used for controlling the rotating electrical machine rotation axis at every turn is the integral multiple of central angle between the adjacent sample bottle, guarantee to annotate the accurate suction of sample needle or discharge sample liquid.

The sample bottle mounting plate 3 may be, for example, a solid disk, and holes for placing sample bottles are formed in the disk (preferably, on the outer edge), and the holes are preferably uniformly distributed, and the number of the holes may be, for example, 12 to 20, or the sample bottle mounting plate 3 may be, for example, a hollow annular plate, and the annular plate is formed with holes for placing sample bottles, and is preferably uniformly distributed, and the number of the holes may be, for example, 12 to 20, and the annular plate is connected to the first sleeve 18 via the connecting rod 12, and the diameter of the sample bottle mounting plate may be, for example, 40 to 60 cm.

The first vertical rod 1 passes through the center of (e.g. preferably vertically) the sample bottle mounting plate 3, and the first sleeve 18 of the first vertical rod 1 is fixedly connected with the sample bottle mounting plate 3, and preferably, the sample bottle mounting plate 3 can be fixed on the top of the first sleeve 18, for example.

As shown in fig. 8, the telescopic mechanical arm 8 comprises a second sleeve 23 fixedly connected with the first upright 1 and a telescopic rod 24 extending into the second sleeve 23 and sliding along the inner wall of the second sleeve, a telescopic two-joint hydraulic arm is fixed inside the second sleeve 23, a first joint arm 25 of the hydraulic arm is fixed inside the second sleeve 23 and connected with a controller 26 controlling the hydraulic arm to extend and retract, a second joint arm 27 extending and retracting along the first joint arm 25 is connected with the telescopic rod 24 for controlling the movement of the telescopic rod 24, the controller 26 is used for receiving an electric signal and controlling the axial extension and retraction movement of the second joint arm 27 along the first joint arm 25, the controller is connected with a main control console (which may be a computer for example) through a wire 28, and here also comprises a hydraulic mechanism driven by a push rod of the hydraulic mechanism to push the second joint arm 27 to extend and retract along the axial direction of the first joint arm 25, the telescopic mechanical arm is preferably vertically and fixedly connected with the first upright 1, the maximum length of scalable arm is unanimous with the radius of appearance bottle mounting disc 3 for annotate the appearance to the accurate appearance bottle center, minimum length is for annotating the distance between appearance mouth and the first pole setting 1, makes and annotates the fixed bolt that appearance needle 9 aimed at in the gas chromatograph and annotates appearance mouth central point and put.

The power device 7 is preferably a dual-purpose gas-liquid metering pump with a bidirectional function, the dual-purpose gas-liquid metering pump can be fixed on a second vertical rod 15 which is independently arranged with the first vertical rod 1, more preferably, the dual-purpose gas-liquid metering pump can be fixed at the top end of the second vertical rod 15, and the dual-purpose gas-liquid metering pump can be connected with a master control platform (for example, a computer) through a lead to control the operation of the dual-purpose gas-liquid metering pump.

As shown in fig. 7, a hole for a sample injection needle to penetrate through is formed in one end, away from the first vertical rod 1, of the telescopic rod 24, grooves for fixing a spring 33 are formed in the telescopic rod on two sides of the hole respectively, an arc-shaped surface abutting plate (clamping apparatus) 32 facing the sample injection needle is fixed at the free end of the spring 33, after the sample injection needle is inserted into the hole, the spring 33 is in a compressed state, and the sample injection needle 9 is clamped by the two arc-shaped surface abutting plates under the action of the spring.

In an alternative embodiment, a second vertical rod 15 may be further fixed on the base, the distance between the second vertical rod 15 and the first vertical rod 1 may be greater than the radius of the sample bottle mounting plate 3, the height of the second vertical rod 15 is greater than the height of the first vertical rod 1, for example, by 10-15cm, a power device 7 is fixed on the second vertical rod 15, the second pipeline 4 is connected with the power device 7 along the second vertical rod 15, the first pipeline 13 passes through the top end of the second vertical rod 15 and then is connected with the inlet of the sample injection needle 9, and the first pipeline 13 between the top end of the second vertical rod 15 and the inlet of the sample injection needle 9 is spiral.

In a preferred embodiment, as shown in fig. 3 and 4, a cylindrical fixer 30 for sleeving a needle is fixed at the bottom end of a syringe 17 of the sample injection needle, the fixer is provided with axial narrow hollow parts 16, the axial length of the narrow hollow parts 16 is 7/10-9/10 of the length of the fixer, the width of the narrow hollow parts 16 is 1/20-1/25, the number of the narrow hollow parts 16 is 5-8, the outer diameter of the fixer is consistent with the outer diameter of the syringe of the sample injection needle, the length of the fixer 30 can be 50-54mm, for example, the narrow hollow parts 16 are uniformly distributed on the fixer, the fixer 30 can be made of PE for example, PVC, PP, preferably PE, the narrow hollow structure of the fixer enables the fixer to be recovered after being compressed or automatically restored when the fixer is slightly rotated (for example, the rotation angle is 2-5 degrees).

In a further preferred embodiment, as shown in fig. 3, 5, and 6, an anastomat 31 complementary to a fixing bolt (as shown in fig. 9) of the sample injection port is fixed at the bottom end of the fixer 30, the fixing bolt of the sample injection port is of a cylindrical structure with straight teeth on the periphery, the straight teeth are uniformly distributed on the outer wall of the cylindrical structure, the number of adjacent straight teeth is 6, for example, a clamping groove is formed between adjacent straight teeth, an axial hole is formed in the center of the cylindrical structure, the sample injection port 10 of the gas chromatograph is located in the axial hole, the anastomat 31 is cylindrical, the anastomat comprises an anastomat wall 311 and a plurality of vertical ribs 312 arranged around the inner periphery of the anastomat wall, the width of the ribs 312 is consistent with the width of the clamping groove, the bottom of the ribs 312 is of a bevel structure, the bevel structure enables the anastomat to realize rotary anastomosis under the action of the fixer when the anastomat is deviated, and sample injection is performed, the fixer 30 is aligned with the fixing bolt downwards, so that the single rib 312 is just clamped into the clamping groove of the fixing bolt, the needle head of the sample injection needle is right opposite to the sample injection port, the first upright rod is shortened and drives the sample injection needle to move downwards, the fixer is extruded and shortened, and the needle head enters the sample injection port to perform sample injection; the length of the anastomat can be 5-10mm, and the anastomat can be made of anticorrosive materials such as copper and stainless steel, and copper is preferred. The diameter of anastomat is unanimous with appearance bottle bottleneck diameter, when guaranteeing to absorb appearance liquid, the anastomat stops in appearance bottle outside, when absorbing appearance liquid, first pole setting shortens and drives and annotates the appearance needle and move down, the appearance bottle bottleneck is aimed at to the anastomat, the fixer receives the extrusion of anastomat and notes appearance needle cylinder and shortens, the centre is the form that expands, the syringe needle gets into appearance liquid bottle and absorbs the sample, inhale the appearance and accomplish the back, first pole setting extension drives and annotates the appearance needle and rise, the anastomat breaks away from appearance bottle bottleneck, the fixer resumes natural state.

The first pipeline 13 or the second pipeline 4 is used for conveying liquid or gas, when a liquid phase system is adopted, the first pipeline 13 and the second pipeline 4 convey liquid, and a filtering membrane for filtering the liquid is arranged on the second pipeline 4; when a gas phase system is adopted, gas is introduced into the first pipeline and the second pipeline, and the second pipeline is provided with a gas pressure valve 5 for controlling gas pressure, such as an electromagnetic pressure reducing valve or a pressure limiting valve, which is controlled by a master control console (such as a computer).

In a specific embodiment, the sample injection needle 9 comprises a syringe 17 and a needle 34, the first conduit 13 is connected with the inlet of the syringe 17, the length of the needle 34 can be 60-70mm, for example, and the size of the sample injection needle can be 10 μ L.

The base 6 can be any shape, for example, it can be square or round, preferably crescent, the concave part of crescent base is aligned with the edge of gas chromatograph, so that the injector is closer to the injection port, and the side of base is opened with the interface connected with the general control desk (such as computer).

Examples

Use the utility model discloses a method of annotating appearance is annotated to automatic injector of gas chromatograph:

use the utility model discloses an during automatic sample injector, be equipped with the looks concern sample procedure on the computer, set up relevant parameter and include opening of power device open the maximum length and the minimum length etc. of number of times, power device's activation time and closing time, the rotation angle parameter of rotating electrical machines rotation axis, the flexible relevant parameter of first pole setting, hydraulic press activation time and closing time, scalable arm.

Firstly, a sample bottle 2 filled with sample liquid and an empty bottle (used as a waste liquid bottle) are placed on a sample bottle mounting disc 3 (the sample bottle mounting disc is provided with 12 holes for illustration), the position of a base 6 is manually adjusted so that the upper part of a sample injection port is over against a connecting line between the center of the sample bottle mounting disc 3 and the empty bottle, a rotating rod is manually adjusted so as to ensure that a sample injection needle is over against the empty bottle, and the position is used as the initial position of the rotating rod.

When a liquid phase system is adopted

(1) And (3) a rinsing stage: the sample injection program is operated, the gas-liquid dual-purpose metering pump is started, methanol is automatically sucked to flush the sample injection needle, the number of flushing times is determined according to the starting and stopping times of the gas-liquid dual-purpose metering pump set by the program, flushing liquid enters an empty bottle, after the sample injection needle 9 is flushed, the rotating rod 19 is controlled by a background computer program to rotate by 30 degrees, 60 degrees, 120 degrees or 180 degrees each time, so that the sample injection needle is right aligned to the upper part of the sample bottle, then the background computer program controls the hydraulic press 21 to start, the first vertical rod 1 is shortened, the sample injection needle 9 enters the sample bottle, the background computer program controls the gas-liquid dual-purpose metering pump to start to suck sample liquid, after the suction is finished, the first vertical rod 1 is extended, the rotating rod 19 is rotated to return to the initial position and the sample liquid is flushed into the empty bottle, the process is repeated for 3-5 times, because the amount of methanol solution or sample solution required by each rinsing is very small, namely 1 mu L, even if the rinsing is carried out for many times, the capacity of one sample bottle can be used as a waste liquid bottle;

(2) a sampling stage: after rinsing is finished, the sample injection needle 9 (rotating rod) stays at an initial position and rotates from the initial position, and the rotating rod is controlled by a background computer program to rotate by 30 degrees, 60 degrees, 120 degrees or 180 degrees each time, so that the sample injection needle can be used for injecting a sample into a sample bottle, the sample injection needle is consistent with the sample suction operation in the step (1), and sample suction is finished;

(3) and (3) a sample injection stage: after the sample is sucked, the background computer program adjusts the telescopic mechanical arm 8 to be the minimum length, namely, the distance between the sample injection port and the first upright rod, the control rotating rod 19 rotates to the initial position, the sample injection needle 9 is just opposite to the center of the sample injection port, the first upright rod 1 is shortened, the anastomat 31 is just opposite to the fixing bolt of the sample injection port, the sample injection needle head 34 is ensured to enter the sample injection port 10, the gas-liquid dual-purpose metering pump is started to inject the sample, after the sample injection is completed, the first upright rod 1 extends, the telescopic mechanical arm 8 is adjusted to be the maximum length, and the sample injection operation is continued by rotating to the upper part of a sample bottle.

When gas phase system is adopted

And (3) a rinsing stage: and (3) operating a sample injection program, starting the gas-liquid dual-purpose metering pump, automatically sucking nitrogen to flush the sample injection needle 9, determining the flushing frequency according to the starting and stopping frequency of the gas-liquid dual-purpose metering pump set by the program, discharging gas into air or blowing the gas into an empty bottle, and performing the same other operations as those in the case of adopting a liquid phase system.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the description of the embodiments is only intended to facilitate the understanding of the methods and their core concepts of the present application. Meanwhile, a person skilled in the art should, according to the idea of the present application, change or modify the embodiments and applications of the present application based on the scope of the present application. In view of the above, the description should not be taken as limiting the application.

Claims (14)

1. An automatic sample injector of a gas chromatograph is characterized by comprising a base (6) and a first vertical rod (1) which is fixed on the base and can rotate and stretch up and down, wherein a sample bottle mounting disc (3) for placing a sample bottle (2) is fixed on the first vertical rod (1), the first vertical rod (1) above the sample bottle mounting disc (3) is connected with a telescopic mechanical arm (8), the free end of scalable arm (8) can be fixed with notes appearance needle (9) that are used for the appearance of advancing, the exit linkage of the import of annotating appearance needle (9) through first pipeline (13) and power device (7), the exit linkage of the import of power device (7) through second pipeline (4) and air supply or lotion storage tank, the rotation and the operation of stretching out and drawing back from top to bottom of first pole setting (1), the flexible operation of scalable arm (8) and the opening and close of power device (7) are through total control panel interlocking control.

2. The automatic injector for gas chromatographs according to claim 1, characterized in that the first vertical rod (1) comprises a first sleeve (18) fixed on the base and a rotating rod (19) which stands in the first sleeve and moves up and down along the inner wall of the first sleeve and is rotatable, and the rotating rod (19) is driven by a hydraulic machine (21) arranged in the first sleeve to move up and down in the first sleeve and is driven by a rotating motor (20) arranged in the first sleeve to rotate.

3. The automatic sample injector for the gas chromatograph according to claim 2, characterized in that a support (29) is arranged inside the first sleeve (18), a rotating motor (20) is fixed on the support, a hydraulic machine (21) is fixed above the rotating motor (20), a rotating shaft of the rotating motor (20) is directly and fixedly connected with the hydraulic machine (21), a rotating rod (19) is fixedly connected above the hydraulic machine (21), the hydraulic machine (21) rotates under the driving of the rotating motor (20) and simultaneously drives the rotating rod to rotate, a pushing rod of the hydraulic machine can estimate the vertical lifting of the rotating rod, the top of the rotating rod (19) is connected with the telescopic mechanical arm (8), so that the telescopic mechanical arm (8) can rotate along with the rotating rod, and the rotating motor (20) and the hydraulic machine (21) are connected with a master control console through a lead (22).

4. The automatic injector for gas chromatographs according to any of claims 1-3, characterized in that the rotating motor (20) is a stepping motor, an angle sensor (14) is fixed to the rotating shaft of the rotating motor (20), and the angle sensor (14) is electrically connected to the general control console for controlling the rotation angle of the first vertical rod (1).

5. The automatic sample injector of gas chromatograph according to claim 4, characterized in that the general control console sets the rotation angle parameter of the rotation shaft of the rotation motor, and is used for controlling the rotation angle of the rotation shaft of the rotation motor to be an integral multiple of the central angle between adjacent sample bottles each time, so as to ensure that the sample injection needle can accurately suck or discharge the sample liquid.

6. Gas chromatograph autosampler according to any of claims 1 to 3, characterized in that the vial mounting plate (3) is fixed to the first sleeve (18) of the first upright (1), the vial mounting plate (3) being a solid disc or a hollow annular plate, the plate being perforated with holes for receiving vials.

7. Gas chromatograph autoinjector according to any of claims 1-3, characterized in that the first pole (1) passes through the center of the vial mounting disc (3), the first sleeve (18) of the first pole (1) being fixedly connected to the vial mounting disc (3).

8. The automatic injector for gas chromatographs according to any one of claims 1-3, characterized in that the telescopic robotic arm (8) comprises a second sleeve (23) fixedly connected to the first vertical rod (1) and a telescopic rod (24) extending into the second sleeve (23) and sliding along the inner wall of the second sleeve, a telescopic two-section hydraulic arm is fixed inside the second sleeve (23), a first section arm (25) of the hydraulic arm is fixed inside the second sleeve (23) and connected to a controller (26) controlling the hydraulic arm to telescope, a second section arm (27) telescoping along the axial direction of the first section arm (25) is connected to the telescopic rod (24) for controlling the movement of the telescopic rod (24), and the controller (26) is used for receiving an electrical signal to control the telescopic movement of the second section arm (27) along the axial direction of the first section arm (25).

9. Gas chromatograph autosampler according to any of claims 1 to 3, characterized in that said power means (7) is a dual-purpose gas-liquid dosing pump with a bi-directional function.

10. The automatic injector for gas chromatographs according to any one of claims 1-3, characterized in that one end of the telescopic rod (24) away from the first vertical rod (1) is provided with a hole for a sample injection needle to pass through, grooves for fixing the spring (33) are respectively arranged in the telescopic rod at two sides of the hole, the free end of the spring (33) is fixed with an arc-shaped surface resisting plate (32) facing the sample injection needle, after the sample injection needle enters the hole, the spring (33) is in a compressed state, and the sample injection needle is clamped by the two arc-shaped surface resisting plates under the action of the spring.

11. The automatic sample injector for gas chromatographs according to any of claims 1-3, characterized in that the base can be further fixed with a second vertical rod (15), the second vertical rod (15) is fixed with a power device (7), the second pipe (4) is connected with the power device (7) along the second vertical rod (15), the first pipe (13) is connected with the inlet of the sample injection needle (9) after passing through the top end of the second vertical rod (15), and the first pipe (13) between the top end of the second vertical rod (15) and the inlet of the sample injection needle (9) is spiral.

12. The automatic injector for gas chromatographs according to any of claims 1-3, characterized in that the bottom of the injector needle cylinder (17) is fitted with a cylindrical holder (30) for the needle, which holder is provided with an axial narrow opening (16).

13. The automatic injector for gas chromatographs according to claim 12, characterized in that the bottom end of the holder (30) is fixed with a stapler (31) complementary to the fixing bolt of the injection port, the stapler (31) is cylindrical, the inside of the stapler (31) is provided with a plurality of vertical ribs (312) arranged around the inner wall, the width of the ribs (312) is consistent with the width of the fixing bolt slots, and the bottom of the ribs (312) is of a chamfered structure.

14. The automatic injector for gas chromatographs according to any of claims 1-3, characterized in that the first (13) or second (4) line is used for transporting liquid or gas, the second line (4) is provided with a filter membrane for filtering the liquid, or the second line (4) is provided with a pneumatic valve (5) for controlling the pressure of the gas, the pneumatic valve (5) being controlled by the general control console.

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