CN112255425A - Semi-automatic constant volume device - Google Patents
Semi-automatic constant volume device Download PDFInfo
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- CN112255425A CN112255425A CN202011260633.8A CN202011260633A CN112255425A CN 112255425 A CN112255425 A CN 112255425A CN 202011260633 A CN202011260633 A CN 202011260633A CN 112255425 A CN112255425 A CN 112255425A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1002—Reagent dispensers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/52—Containers specially adapted for storing or dispensing a reagent
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
- G01N2035/1025—Fluid level sensing
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Abstract
The invention relates to a semi-automatic constant volume device, which comprises a shell, a camera shooting liquid fixing mechanism and a lifting positioning assembly; the camera shooting liquid fixing mechanism comprises an electric control system, a camera shooting assembly and a liquid adding assembly; the camera assembly comprises a camera and a first motor, the first motor is a lead screw motor, a first sliding block is arranged on a lead screw of the first motor, and the camera is fixedly connected to the first sliding block; the liquid feeding assembly comprises a liquid inlet, a liquid outlet and a liquid drawing pump, the liquid inlet is formed in the side wall of the shell and connected with the liquid drawing pump, the liquid drawing pump is connected with a stabilizing pool, an electromagnetic valve is arranged on the stabilizing pool, and the electromagnetic valve is connected with the liquid outlet. The semi-automatic constant volume device can effectively improve the working efficiency of experimenters, improve the accuracy of constant volume, reduce constant volume error and to the waste of sample, can satisfy the liquid feeding demand among various quantitative analysis, the range of application is wide.
Description
Technical Field
The invention relates to the technical field of experimental instruments, in particular to a semi-automatic constant volume device.
Background
Volumetric flasks are precision instruments used to prepare solutions of exact quantitative concentrations of a substance. The glass bottle is a long and thin neck pear-shaped flat-bottom glass bottle with a ground glass plug, scales are arranged on the neck, and when the volume in the bottle reaches a marked line at a specified temperature, the volume is the marked volume number.
In conventional chemical analysis, the constant volume of the volumetric flask is a conventional step, and at present, the constant volume of the volumetric flask is that the solution is added to the scale mark of the near volumetric flask firstly, then the volumetric flask is held by hands, the scale mark of the volumetric flask and eyes are kept on the same plane, and then a dropper or a straw is used for adding liquid to the scale mark. When the volumetric flask is subjected to constant volume, the scale lines of the volumetric flask are kept on the same plane with eyes by hands, and under the condition of continuous large-batch constant volume, the upward or downward constant volume is often caused due to fatigue or paralysis, so that the constant volume is failed; in addition, the liquid is added to the scale by using a dropper or a straw, and the liquid is easily added to exceed the scale due to inaccurate control of the characteristics of the dropper or the straw, so that the constant volume is also failed.
Because the constant volume liquid feeding process of the prior volumetric flask still needs to be operated manually by operators, the manual operation is complicated, the working efficiency is lower, and the volumetric flask is time-consuming and labor-consuming and is easy to make mistakes under the condition of continuous large-batch constant volume.
Therefore, a semi-automatic constant volume device is designed to solve the problems.
Disclosure of Invention
The invention provides a semi-automatic constant volume device for overcoming the defects, which comprises a shell, a camera shooting liquid fixing mechanism and a lifting positioning assembly, wherein the camera shooting liquid fixing mechanism is arranged on the shell;
the camera shooting liquid fixing mechanism comprises an electric control system, a camera shooting assembly and a liquid adding assembly;
the camera assembly comprises a camera and a first motor, the first motor is a lead screw motor, a first sliding block is arranged on a lead screw of the first motor, and the camera is fixedly connected to the first sliding block; a second proximity switch is fixed on the first sliding block, an upper limiting block is arranged at the upper part of a screw rod of the first motor, a lower limiting block is arranged at the lower part of the screw rod of the first motor, the second proximity switch is electrically connected with the first motor, when the second proximity switch is close to the upper limiting block, the first motor stops working, when the second proximity switch is close to the lower limiting block, the first motor stops working, and therefore the first sliding block is limited between the upper limiting block and the lower limiting block;
the liquid adding assembly comprises a liquid inlet, a liquid outlet and a liquid drawing pump, the liquid inlet is formed in the side wall of the shell and is connected with the liquid drawing pump, the liquid drawing pump is connected with a stabilizing pool, an electromagnetic valve is arranged on the stabilizing pool, and the electromagnetic valve is connected with the liquid outlet; the liquid outlet is positioned above the placed volumetric flask; after liquid to be added enters from the liquid inlet and is stabilized on the stabilizing pool through the liquid drawing pump, the electromagnetic valve controls the liquid outlet to flow out;
the camera of the camera assembly is electrically connected with an electric control system, the electric control system is electrically connected with the electromagnetic valve of the liquid adding assembly, and when the camera displays that the liquid level of the volumetric flask is coincident with the scale mark of the volumetric flask, a closing electric signal is sent to the electromagnetic valve;
the lifting positioning component is used for supporting the volumetric flask.
Furthermore, a rear cover which can be opened and closed is arranged on the rear side of the shell; the electric control system is positioned on the inner side cover door of the rear cover.
Further, the lifting positioning assembly comprises a tray and a second motor, the tray is used for bearing the volumetric flask, the tray is sleeved on an output shaft of the second motor through a connecting arm, a first proximity switch for controlling the opening and closing of a third motor is arranged at the connecting end of the connecting arm and the second motor, a first limiting block and a second limiting block are arranged on the first proximity switch in a matched mode, the first limiting block and the second limiting block limit the rotatable position of the tray, and when the first proximity switch contacts with the first limiting block and the second limiting block, a closing signal is sent to the third motor; when the first proximity switch rotates to the first limiting block, the bottle opening of the volumetric flask is over against the liquid outlet.
Furthermore, the lifting positioning assembly comprises a supporting base and a third motor, the supporting base is sleeved with an output shaft of the third motor through an L-type connecting rod, a third proximity switch for controlling the third motor to be opened and closed is arranged on the output shaft of the third motor, and a first limiting block and a second limiting block are arranged on the third proximity switch in a matched mode; the first limiting block and the second limiting block limit the rotatable position of the support base; when the third proximity switch contacts the first limiting block and the second limiting block, a closing signal is sent to the third motor, and when the third proximity switch rotates to the second limiting block, the bottle opening of the volumetric flask is over against the liquid outlet.
Furthermore, the bottleneck of the small-size volumetric flask is narrow and is easy to be dripped outside, so that a bottleneck clamping assembly is designed; the lifting positioning assembly further comprises a bottle opening clamping assembly, the bottle opening clamping assembly comprises an installation plate, the installation plate is fixed to the top of the vertical portion of the L-shaped connecting rod, a supporting rod and a sliding rail are fixed to the top surface of the installation plate, and the supporting rod is provided with an installation rod capable of moving up and down through a spring; a first hinged arm and a second hinged arm are hinged to the mounting rod, a first moving block and a second moving block are arranged on the sliding rail in a sliding mode, the first moving block is fixed to the first hinged arm, and the second moving block is fixed to the second hinged arm; the first moving block is connected with a first clamping arm, the second moving block is connected with a second clamping arm, and the first clamping arm and the second clamping arm are matched and fixedly clamped with a bottleneck of a volumetric flask; the mounting rod is close to the support rod, the free ends of the first hinged arm and the second hinged arm are far away, the first moving block and the second moving block are far away on the slide rail, and the first clamping arm and the second clamping arm are far away, so that the bottleneck of the volumetric flask can be conveniently clamped; on the contrary, after the neck of the volumetric flask is placed, the mounting rod is far away from the support rod under the action of the spring, the free ends of the first hinged arm and the second hinged arm are close to each other, the first moving block and the second moving block are close to each other on the slide rail, and the first clamping arm and the second clamping arm are close to each other to fixedly clamp the neck of the volumetric flask.
Furthermore, an illuminating lamp is arranged at the liquid outlet, and the position of the illuminating lamp corresponds to the bottle mouth of the volumetric flask, so that the operation of a camera is convenient during liquid adding; the liquid outlet 5 is embedded with a lighting lamp, so that the operation of a camera is convenient during liquid adding.
The invention has the beneficial effects that:
the semi-automatic constant volume device can effectively improve the working efficiency of experimenters, improve the accuracy of constant volume, reduce constant volume errors and waste of samples, and overcome the defect that the traditional constant volume method is easy to cause constant volume failure due to fatigue or paralysis especially under the condition that a large quantity of volumetric flasks need constant volume; the semi-automatic constant volume device is convenient to use, high in accuracy, high in speed and good in stability, can meet the liquid adding requirements in various quantitative analyses, and is wide in application range.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the present invention in use;
FIG. 3 is a front view (one) of the present invention in use;
FIG. 4 is a bottom view (one) of the present invention in use;
FIG. 5 is a perspective view of the present invention in use;
FIG. 6 is a front view of the present invention in use (II);
FIG. 7 is a bottom view of the present invention in use (II);
FIG. 8 is a perspective view of the present invention (back cover open state);
FIG. 9 is a perspective view of the present invention (with the interior removed from the housing);
FIG. 10 shows a liquid-fixing mechanism for camera shooting;
FIG. 11 is a perspective view of the refill assembly;
FIG. 12 is a first schematic view of a first embodiment of a lift pin assembly;
FIG. 13 is a schematic view of a first embodiment of a lift positioning assembly;
FIG. 14 is a perspective view of the present invention (second embodiment of the lift positioning assembly)
FIG. 15 is a schematic view of a second embodiment of a lift positioning assembly;
FIG. 16 is a perspective view of the pedestal;
FIG. 17 is a perspective view of the finish clamp assembly;
wherein:
1-a shell; 2-a tray; 3-a camera; 4-liquid inlet; 5-a liquid outlet; 6-rear cover; 7-a liquid drawing pump; 8-a stabilization tank; 9-an electromagnetic valve; 10-a first electric machine; 11-a second motor; 12-a first stopper; 13-a second stopper; 14-a first proximity switch; 15-a first slider; 16-a second proximity switch; 17-an upper limit block; 18-a lower limit block; 19-a third motor; 20-a limiting block; 21-second limiting block; 22-a pedestal; 23-mounting a plate; 24-a mounting bar; 25-a first hinge arm; 26-a second hinge arm; 27-a first clip arm; 28-a second clamp arm; 29-a slide rail; 30-a first moving block; 31-a second moving mass; 32-a support bar; 33-third proximity switch.
Detailed Description
The following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
A semi-automatic constant volume device comprises a shell 1, a camera shooting liquid fixing mechanism and a lifting positioning assembly;
the camera shooting liquid fixing mechanism comprises an electric control system, a camera shooting assembly and a liquid adding assembly;
as shown in fig. 9 and 10, the camera assembly includes a camera 3 and a first motor 10, the first motor 10 is a lead screw motor, a lead screw of the first motor 10 is provided with a first slider 15, and the camera 3 is fixedly connected to the first slider 15; a second proximity switch 16 is fixed on the first slider 15, an upper limit block 17 is arranged at the upper part of a screw rod of the first motor 10, a lower limit block 18 is arranged at the lower part of the screw rod of the first motor 10, the second proximity switch 16 is connected with the first motor 10 through an electric signal, when the second proximity switch 16 is close to the upper limit block 17, the first motor 10 stops working, when the second proximity switch 16 is close to the lower limit block 18, the first motor 10 stops working, and therefore the first slider 15 is limited between the upper limit block 17 and the lower limit block 18;
as shown in fig. 11, the liquid adding assembly includes a liquid inlet 4, a liquid outlet 5 and a liquid drawing pump 7, the liquid inlet 4 is opened on a side wall of the housing 1, the liquid inlet 4 is connected with the liquid drawing pump 7, the liquid drawing pump 7 is connected with a stabilization tank 8, an electromagnetic valve 9 is arranged on the stabilization tank 8, and the electromagnetic valve 9 is connected with the liquid outlet 5; the liquid outlet 8 is positioned above the placed volumetric flask; after liquid to be added enters from the liquid inlet 4 and is pumped to the stabilization pool 8 by the liquid drawing pump 7 to be stabilized, the electromagnetic valve 9 controls the liquid outlet 5 to flow out;
the camera 3 of the camera assembly is in electric signal connection with an electric control system, the electric control system is in electric signal connection with the electromagnetic valve 9 of the liquid adding assembly, and when the camera 3 displays that the liquid level of the volumetric flask coincides with the scale mark of the volumetric flask, a closing electric signal is sent to the electromagnetic valve 9;
the lifting positioning component is used for supporting the volumetric flask.
Further, a rear cover 6 which can be opened and closed is arranged on the rear side of the shell 1; the electric control system is positioned on the inner side cover door of the rear cover 6.
Further, as shown in fig. 12 and 13, the lifting positioning assembly includes a tray 2 and a second motor 11, the tray 2 is used for bearing a volumetric flask, the tray 2 is sleeved on an output shaft of the second motor 11 through a connecting arm, a first proximity switch 14 for controlling the opening and closing of a third motor 19 is arranged at a connecting end of the connecting arm and the second motor 11, a first limit block 12 and a second limit block 13 are arranged in the first proximity switch 14 in a matching manner, the first limit block 12 and the second limit block 13 limit the rotatable position of the tray 2, and when the first proximity switch 14 contacts the first limit block 12 and the second limit block 13, a closing signal is sent to the third motor 19; when the first proximity switch 14 rotates to the first limiting block 12, the bottle mouth of the volumetric flask is over against the liquid outlet 5.
Further, the lifting positioning assembly comprises a supporting base 22 and a third motor 19, the supporting base 22 is sleeved with an output shaft of the third motor 19 through an L-type connecting rod, a third proximity switch 33 for controlling the third motor 19 to be opened and closed is arranged on the output shaft of the third motor 19, and a first limiting block 20 and a second limiting block 21 are arranged on the third proximity switch 33 in a matched mode; the first limiting block 12 and the second limiting block 13 limit the rotatable position of the supporting base 22; when the third proximity switch 33 contacts the first limiting block 20 and the second limiting block 21, a closing signal is sent to the third motor 19, and when the third proximity switch 33 rotates to the second limiting block 21, the bottle mouth of the volumetric flask is over against the liquid outlet 5.
Further, as shown in fig. 17, the bottleneck of the small-sized volumetric flask is narrow and is easy to be dropped outside, so a bottleneck clamping assembly is designed; the lifting positioning assembly further comprises a bottle opening clamping assembly, the bottle opening clamping assembly comprises an installation plate 23, the installation plate 23 is fixed to the top of the vertical portion of the L-type connecting rod, a supporting rod 32 and a sliding rail 29 are fixed to the top surface of the installation plate 23, and an installation rod 24 capable of moving up and down is installed on the supporting rod 32 through a spring; a first hinged arm 25 and a second hinged arm 26 are hinged to the mounting rod 24, a first moving block 30 and a second moving block 31 are arranged on the sliding rail 29 in a sliding manner, the first moving block 30 is fixed on the first hinged arm 25, and the second moving block 31 is fixed on the second hinged arm 26; the first moving block 30 is connected with a first clamping arm 27, the second moving block 31 is connected with a second clamping arm 28, and the first clamping arm 27 and the second clamping arm 28 are matched and fixed to clamp the bottleneck of the volumetric flask; the mounting rod 24 is close to the support rod 32, the free ends of the first hinge arm 25 and the second hinge arm 26 are far away, the first moving block 30 and the second moving block 31 are far away on the slide rail 29, and the first clamping arm 27 and the second clamping arm 28 are far away, so that the bottle neck of the volumetric flask can be conveniently clamped; on the contrary, after the neck of the volumetric flask is placed, under the action of the spring, the mounting rod 24 is far away from the support rod 32, the free ends of the first hinge arm 25 and the second hinge arm 26 are close to each other, the first moving block 30 and the second moving block 31 are close to each other on the slide rail 29, and the first clamping arm 27 and the second clamping arm 28 are close to each other, so that the neck of the volumetric flask is fixedly clamped.
Furthermore, a lighting lamp is arranged at the liquid outlet 5, and the position of the lighting lamp corresponds to the bottle mouth of the volumetric flask, so that the camera 3 is convenient to operate during liquid adding; the liquid outlet 5 is embedded with a lighting lamp, so that the operation of a camera is convenient during liquid adding.
The using method comprises the following steps:
the invention is suitable for any liquid container with scale marks, such as volumetric flasks, colorimetric tubes and the like; hereinafter, a volumetric flask is taken as an example;
as shown in fig. 1-13, a volumetric flask is placed on the lifting positioning assembly, a first proximity switch 14 cooperates with a first limit block 12 and a second limit block 13 to control the opening and closing of a second motor 11, the lifting positioning assembly drives the volumetric flask to rotate to the lower side of the liquid outlet 5 through the second motor 11, and after a liquid to be added enters through a liquid inlet 4 and is pumped onto a stabilization tank 8 through a liquid drawing pump 7 to be stabilized, a solenoid valve 9 controls the liquid outlet 5 to flow out;
the camera 3 descends along with the first sliding block 15 on the screw rod of the first motor 10 to accurately find the scale mark of the volumetric flask to start shooting; the camera 3 irradiates the scale marks at the bottle mouth of the volumetric flask, and when the distance between the liquid level and the scale marks of the volumetric flask is more than 4cm, the liquid is fed at a high speed; when the distance between the liquid level and the scale mark of the volumetric flask is more than 1cm and less than 4cm, adding one strand of liquid at a medium speed; when the distance between the liquid level and the scale mark of the volumetric flask is less than 1cm and more than 0cm, slowly dripping; when the bottom edge of the liquid level is level with the scale line of the volumetric flask, stopping dripping; the camera 3 rises and retracts on a lead screw of the first motor 10 along with the first sliding block 15; the upper limit block 17 and the lower limit block 18 prevent the camera 3 from moving beyond the limit and impacting the top and the bottom;
as shown in fig. 14 to 17, the volumetric flask is supported by the supporting base 22 of the lifting positioning assembly, and the volumetric flask is rotated to a position right below the liquid outlet 5 by the rotation of the third motor 19 when the third proximity switch 33 is close to the second limiting block 21; when the third proximity switch 33 is close to the first limit block 20; the volumetric flask is rotated out of the shell 1, so that the volumetric flask is convenient to take;
the first clamping arm 27 and the second clamping arm 28 are matched with each other to fixedly clamp the bottleneck of the volumetric flask; the mounting rod 24 is close to the support rod 32, the free ends of the first hinge arm 25 and the second hinge arm 26 are far away, the first moving block 30 and the second moving block 31 are far away on the slide rail 29, and the first clamping arm 27 and the second clamping arm 28 are far away, so that the bottleneck of the volumetric flask can be conveniently placed; on the contrary, after the neck of the volumetric flask is placed, under the action of the spring, the mounting rod 24 is far away from the support rod 32, the free ends of the first hinged arm 25 and the second hinged arm 26 are close to each other, the first moving block 30 and the second moving block 31 are close to each other on the slide rail 29, and the first clamping arm 27 and the second clamping arm 28 are close to each other, so that the neck of the volumetric flask is fixedly clamped; the bottleneck of the volumetric flask of small size is narrow, and the bottle is easy to be dripped to the outside, so that the bottleneck clamping assembly is designed, and the accurate dripping is convenient.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A semi-automatic constant volume device comprises a shell (1), a camera shooting liquid fixing mechanism and a lifting positioning assembly, and is characterized in that the camera shooting liquid fixing mechanism comprises an electric control system, a camera shooting assembly and a liquid adding assembly;
the camera shooting assembly comprises a camera (3) and a first motor (10), the first motor (10) is a lead screw motor, a lead screw of the first motor (10) is provided with a first sliding block (15), and the camera (3) is fixedly connected to the first sliding block (15); a second proximity switch (16) is fixed on the first sliding block (15), an upper limit block (17) is arranged at the upper part of a screw rod of the first motor (10), a lower limit block (18) is arranged at the lower part of the screw rod of the first motor (10), the second proximity switch (16) is connected with the first motor (10) through an electric signal, when the second proximity switch (16) is close to the upper limit block (17), the first motor (10) stops working, when the second proximity switch (16) is close to the lower limit block (18), the first motor (10) stops working, and therefore the first sliding block (15) is limited between the upper limit block (17) and the lower limit block (18);
the liquid adding assembly comprises a liquid inlet (4), a liquid outlet (5) and a liquid sucking pump (7), the liquid inlet (4) is formed in the side wall of the shell (1), the liquid inlet (4) is connected with the liquid sucking pump (7), the liquid sucking pump (7) is connected with a stabilizing pool (8), an electromagnetic valve (9) is arranged on the stabilizing pool (8), and the electromagnetic valve (9) is connected with the liquid outlet (5); the liquid outlet (8) is positioned above the placed volumetric flask; liquid to be added enters from the liquid inlet (4), and is pumped to the stabilization pool (8) through the liquid drawing pump (7) to be stabilized, and then the electromagnetic valve (9) controls the liquid outlet (5) to flow out;
the camera (3) of the camera assembly is in electric signal connection with an electric control system, the electric control system is in electric signal connection with the electromagnetic valve (9) of the liquid adding assembly, and when the camera (3) displays that the liquid level of the volumetric flask is coincident with the scale mark of the volumetric flask, an electric closing signal is sent to the electromagnetic valve (9);
the lifting positioning component is used for supporting the volumetric flask.
2. A semi-automatic constant volume device according to claim 1, characterized in that a rear cover (6) which can be opened and closed is arranged at the rear side of the shell (1); the electric control system is positioned on the inner side cover door of the rear cover (6).
3. A semi-automatic constant volume device according to claim 2, characterized in that the lifting positioning assembly comprises a tray (2) and a second motor (11), the tray (2) is used for bearing the volumetric flask, the tray (2) is sleeved on an output shaft of the second motor (11) through a connecting arm, a first proximity switch (14) for controlling the on-off of a third motor (19) is arranged at the connecting end of the connecting arm and the second motor (11), the first proximity switch (14) is provided with a first limit block (12) and a second limit block (13) in a matching way, the first limiting block (12) and the second limiting block (13) limit the rotatable position of the tray (2), and when the first proximity switch (14) contacts the first limiting block (12) and the second limiting block (13), a closing signal is sent to the third motor (19); when the first proximity switch (14) rotates to the first limiting block (12), the bottle opening of the volumetric flask is over against the liquid outlet (5).
4. The semi-automatic constant volume device according to claim 3, wherein the lifting positioning assembly comprises a supporting base (22) and a third motor (19), the supporting base (22) is sleeved with an output shaft of the third motor (19) through an L-type connecting rod, a third proximity switch (33) for controlling the third motor (19) to be opened and closed is arranged on the output shaft of the third motor (19), and a first limit block (20) and a second limit block (21) are arranged on the third proximity switch (33) in a matched manner; the first limiting block (12) and the second limiting block (13) limit the rotatable position of the support base (22); when a third proximity switch (33) contacts the first limiting block (20) and the second limiting block (21), a closing signal is sent to a third motor (19), and when the third proximity switch (33) rotates to the second limiting block (21), the bottle opening of the volumetric flask is just opposite to the liquid outlet (5).
5. The semi-automatic constant volume device according to claim 4, wherein the lifting and positioning assembly further comprises a bottle opening clamping assembly, the bottle opening clamping assembly comprises a mounting plate (23), the mounting plate (23) is fixed to the top of the vertical portion of the L-type connecting rod, a supporting rod (32) and a sliding rail (29) are fixed to the top surface of the mounting plate (23), and the supporting rod (32) is provided with a mounting rod (24) which can move up and down through a spring; a first hinged arm (25) and a second hinged arm (26) are hinged to the mounting rod (24), a first moving block (30) and a second moving block (31) are arranged on the sliding rail (29) in a sliding mode, the first moving block (30) and the second moving block (31) are fixed to the first hinged arm (25), and the second moving block (31) is fixed to the second hinged arm (26); the first moving block (30) is connected with a first clamping arm (27), the second moving block (31) is connected with a second clamping arm (28), and the first clamping arm (27) and the second clamping arm (28) are matched and fixed to clamp the bottleneck of the volumetric flask; the mounting rod (24) is close to the supporting rod (32), the free ends of the first hinged arm (25) and the second hinged arm (26) are far away, the first moving block (30) and the second moving block (31) are far away on the sliding rail (29), and the first clamping arm (27) and the second clamping arm (28) are far away, so that the bottleneck of the volumetric flask can be clamped conveniently; on the contrary, after the neck of the volumetric flask is placed, under the action of a spring, the mounting rod (24) is far away from the supporting rod (32), the free ends of the first hinged arm (25) and the second hinged arm (26) are close to each other, the first moving block (30) and the second moving block (31) are close to each other on the sliding rail (29), and the first clamping arm (27) and the second clamping arm (28) are close to each other, so that the neck of the volumetric flask is fixedly clamped.
6. A semi-automatic constant volume device according to claim 5, characterized in that a lighting lamp is arranged at the liquid outlet (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011260633.8A CN112255425A (en) | 2020-11-12 | 2020-11-12 | Semi-automatic constant volume device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011260633.8A CN112255425A (en) | 2020-11-12 | 2020-11-12 | Semi-automatic constant volume device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112255425A true CN112255425A (en) | 2021-01-22 |
Family
ID=74265741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011260633.8A Pending CN112255425A (en) | 2020-11-12 | 2020-11-12 | Semi-automatic constant volume device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112255425A (en) |
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2020
- 2020-11-12 CN CN202011260633.8A patent/CN112255425A/en active Pending
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