CN219201071U

CN219201071U - Diluting constant volume device

Info

Publication number: CN219201071U
Application number: CN202223119398.XU
Authority: CN
Inventors: 全洗强; 王朝晖; 俞建国; 黄俊杰; 秦愫妮; 杜文越
Original assignee: Institute of Karst Geology of CAGS
Current assignee: Institute of Karst Geology of CAGS
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-06-16
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses a diluting and constant-volume device, and belongs to the technical field of experimental apparatuses. The device comprises a base, wherein a fixed rod is arranged on the base, a mounting rod is arranged on the fixed rod, and the device also comprises a sampling assembly and a constant volume assembly; the sampling assembly comprises an air extractor, an air exhaust pipe and a sampling pipe, and a scribing line is arranged on the sampling pipe, so that the volume of sampling is convenient to confirm; the air exhaust device is provided with an air exhaust pipe, the tail end of the air exhaust pipe is provided with a sampling pipe, and the sampling pipe is movably arranged on the mounting rod; the constant volume component comprises a liquid carrying cup, a liquid taking device and a liquid taking pipe; the liquid carrying cup is arranged on the side surface of the liquid taking device, one end of the liquid taking pipe extends into the liquid carrying cup through the liquid taking device, and the other end of the liquid taking pipe is movably arranged on the mounting rod; the air extractor, the liquid carrying cup and the liquid taking device are respectively arranged at two sides of the base. This novel sample operation is accomplished to the sampling subassembly, and the constant volume operation is accomplished to reuse constant volume subassembly, and convenient operation is swift, has higher dilution constant volume efficiency.

Description

Diluting constant volume device

Technical Field

The utility model belongs to the technical field of experimental apparatuses, and particularly relates to a diluting and constant-volume device.

Background

Dilution to volume is an important task in chemical analysis. When the content of the sample is high, the sample needs to be diluted and fixed in volume so as to ensure the accuracy of the analysis result. The existing dilution constant volume mainly comprises the following components:

1. squeezing the ear washing ball to remove a certain amount of sample solution into a corresponding appliance, and then removing the solvent to fix the volume to the score line. The method is simple and convenient to operate, but when the batch samples are diluted and fixed in volume, the ear balls are required to be repeatedly squeezed and pinched, so that the operation efficiency is low, the fingers are easy to fatigue, and the inaccurate moving and taking amount of the samples is easy to occur.

2. And (5) adopting a diluting and volume-fixing device to finish diluting and volume-fixing. The method has the functions of sampling, quantifying, uniformly mixing and the like, and is mostly matched with an analysis device for use so as to realize automatic analysis and detection of samples. For example, chinese patent document CN208313682U, which discloses a constant volume device for automatic dilution, comprising a constant volume bottle, on which a mother liquor input port, a dilution water input pipe orifice, and an overflow port are provided; the device is respectively connected with a mother liquor input loop, a diluent bottle and a waste liquor container; a peristaltic pump is arranged on the pipeline connected with the dilution water input pipe orifice, and a titration pump is arranged on the pipeline connected with the mother liquor input port; the bottom of the constant volume bottle is provided with a discharge port, and the discharge port is respectively connected with an air blowing valve, a sampling valve and a liquid discharge pinch valve in parallel; the air blowing valve is connected with the stirring air pump, the sampling valve can be connected with the detecting instrument, and the liquid draining pinch valve is connected with the waste liquid outlet. The proposal of the patent can realize automatic dilution and volume fixing, but needs to be matched with a detection instrument for use, and is not suitable for the dilution and volume fixing requirements (such as titration analysis) of some analysis experiments.

Accordingly, the inventors of the present application devised a dilution constant volume device.

Disclosure of Invention

The utility model provides a diluting and constant-volume device for solving the technical problems.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the diluting and constant-volume device comprises a base, wherein a fixing rod is arranged on the base, a mounting rod is arranged on the fixing rod, and the diluting and constant-volume device further comprises a sampling assembly and a constant-volume assembly; the sampling assembly comprises an air exhaust device, an air exhaust pipe and a sampling pipe, and a score line is arranged on the sampling pipe so as to be convenient for confirming the sampling volume; the air exhaust device is provided with the air exhaust pipe, the tail end of the air exhaust pipe is provided with the sampling pipe, and the sampling pipe is movably arranged on the mounting rod; the constant volume component comprises a liquid carrying cup, a liquid taking device and a liquid taking pipe; the liquid carrying cup is arranged on the side surface of the liquid taking device, one end of the liquid taking pipe extends into the liquid carrying cup through the liquid taking device, and the other end of the liquid taking pipe is movably arranged on the mounting rod; the air extractor, the liquid carrying cup and the liquid taking device are respectively arranged on two sides of the base. Sampling: placing the tail end of the sampling tube into a sample solution to be diluted, starting an air extractor, sucking the sample solution into the sampling tube, when the sample solution entering the sampling tube reaches a specified line, pinching an air extracting tube close to one end of the sampling tube to avoid continuous air extraction and sampling, lifting the sampling tube into a device with a constant volume (such as a volumetric flask, a test tube and the like), and removing the air extracting tube on the sampling tube to finish sampling; constant volume: the liquid carrying cup is filled with a solvent for dilution, one end of the liquid taking pipe is immersed in the solvent of the liquid carrying cup, and the other end of the liquid taking pipe penetrates through the liquid taking device and stretches into the upper part of the constant volume appliance; and opening the liquid taking device, enabling the solvent to flow into the constant volume device through the liquid taking pipe, and taking out the liquid taking pipe and pinching the liquid taking pipe when the solution in the constant volume device reaches the position of the dividing line, thus completing the constant volume. When more samples with fixed volume are diluted, the sampling assembly can be used for completing sampling, and then the fixed volume assembly is used for completing the fixed volume so as to improve the operation efficiency; the air extracting device is a miniature air pump and is used for extracting air; the liquid taking device is a peristaltic pump and is used for conveying the solvent with constant volume; the exhaust pipe and the liquid taking pipe can be silica gel pipes; the sampling tube may be a pipette or pipette with a score line to ensure quantitative sampling of the sample solution.

Further, the sampling assembly further comprises a buffer bottle, two branch pipe ports are formed in two sides of the buffer bottle, one branch pipe port is connected with the air extractor, and the other branch pipe port is connected with the sampling pipe. Because the sampling is negative pressure in the pipeline caused by air suction of the air suction device, under the action of air pressure, when the sampling pipe stretches into the sample solution, the sample solution easily enters the sampling pipe; in order to prevent sample solution from entering the sampling device caused by careless operation, the buffer bottle is arranged, so that even if the sample solution enters the exhaust tube, the sample solution can only enter the buffer bottle, and the use safety of the exhaust device is ensured.

Further, a clamping groove is formed in one end, close to the sampling assembly, of the mounting rod, an elastic layer is arranged in the clamping groove, and the clamping groove is used for movably clamping the sampling tube on the mounting rod. The clamping groove is convenient to clamp the sampling tube when not in use, and the sampling tube can be taken down very conveniently when in use, so that the convenience of use is improved.

Further, a clamp is arranged at one end of the mounting rod, which is close to the constant volume component, and is used for clamping the tail end of the liquid taking pipe. The clip provided on the mounting bar may be used to clamp the liquid extraction tube to prevent solvent from dripping from the liquid extraction tube when the volume is not constant.

Further, one end of the liquid taking pipe, which is far away from the liquid carrying cup, is provided with a constant volume pipe, and the tail end of the constant volume pipe is of a closing-in structure. The end of the constant volume pipe is of a closing-in structure, so that the caliber of a liquid outlet part at the end of the constant volume pipe is smaller, the constant volume is convenient, and the solvent is prevented from flowing out too fast to exceed a scribing line during constant volume, so that the constant volume is inaccurate.

Further, a placing groove is formed in the base, and the sampling assembly and the constant volume assembly are located on the outer side of the placing groove. The placing groove can be used for placing containers with constant volume, such as a volumetric flask, and can play a certain role in fixation; if the test tube is fixed in volume, the test tube can be placed on a test tube rack in advance, and then the test tube rack is arranged on the bottom plate.

Further, a plurality of circular grooves are formed in the inner side of the placement groove, the grooves are distributed along the length direction of the placement groove, and adjacent grooves are not connected. If the volumetric flask is used for volume fixing, the volumetric flask with smaller specification can be placed in the groove, and the volumetric flask with large specification can be directly placed on the placing groove because of different specifications of different volumetric flasks; the specification of standing groove, recess can be according to the volumetric flask specification of using commonly used design preparation to convenient to use.

The utility model has the advantages that:

1. when diluting the sample, use air extraction device to bleed for treat that dilute sample can enter into the sampling tube fast, be equipped with the scale mark on the sampling tube and can realize quantitative sampling, greatly improve sampling efficiency, avoid using the ear washing ball to squeeze the hand discomfort that leads to the fact, and guarantee the quick accuracy of sample.

2. When the volume is fixed, the solvent placed in the liquid carrying cup is sent into the device to be fixed through the liquid taking pipe by the operation of the liquid taking device, and the volume is fixed to the score line, so that the operation is convenient and quick.

3. The combined use of the sampling assembly and the constant volume assembly can better solve the problem of diluting and constant volume of a large amount of samples in a laboratory, can be used for diluting and constant volume of samples of a solution type, and is convenient and quick to operate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of the present utility model.

Fig. 2 is a partially enlarged schematic view at a of fig. 1.

Fig. 3 is a schematic structural view of the base.

Reference numerals: 1-base, 11-dead lever, 12-installation pole, 13-clip, 14-standing groove, 15-recess, 2-sampling module, 21-air extraction device, 22-exhaust tube, 23-sampling tube, 24-buffer bottle, 25-branch mouth, 26-draw-in groove, 3-constant volume module, 31-liquid carrying cup, 32-liquid taking device, 33-liquid taking tube, 34-constant volume tube.

Detailed Description

For a better understanding of the present utility model, reference is made to the following examples, which are included within the scope of the present utility model, but are not to be construed as limiting the scope of the present utility model.

Examples

1-3, the diluting and constant-volume device comprises a base 1, wherein a fixed rod 11 is arranged on the base 1, a mounting rod 12 is arranged on the fixed rod 11, and the diluting and constant-volume device further comprises a sampling assembly 2 and a constant-volume assembly 3; the sampling assembly 2 comprises an air extracting device 21, an air extracting tube 22 and a sampling tube 23; the air extractor 21 is provided with an air extracting pipe 22, the tail end of the air extracting pipe 22 is provided with a sampling pipe 23, and the sampling pipe 23 is movably arranged on the mounting rod 12; the constant volume component 3 comprises a liquid carrying cup 31, a liquid taking device 32 and a liquid taking pipe 33; the liquid carrying cup 31 is arranged on the side surface of the liquid taking device 32, one end of the liquid taking pipe 33 extends into the liquid carrying cup 31 through the liquid taking device 32, and the other end of the liquid taking pipe 33 is movably arranged on the mounting rod 12; the air extractor 21, the liquid carrying cup 31 and the liquid taking device 32 are respectively arranged on two sides of the base 1.

As shown in fig. 1-2, the sampling assembly 2 further comprises a buffer bottle 24, two branch pipe ports 25 are arranged on two sides of the buffer bottle 24, one pipe port 25 is connected with the air extractor 21, and the other pipe port 25 is connected with the sampling pipe 23.

As shown in fig. 1, a clamping groove 26 is formed in one end of the mounting rod 12, which is close to the sampling assembly 2, an elastic layer is formed in the clamping groove 26, the elastic layer can be made of soft elastic material such as rubber, and the clamping groove 26 is used for movably clamping the sampling tube 23 on the mounting rod 12.

As shown in fig. 1-2, a clip 13 is provided on the end of the mounting rod 12 near the constant volume component 3, the clip 13 can be loosened or clamped around the end fixed on the mounting rod 12, and the clip 13 is used for clamping the end of the liquid taking pipe 33 to prevent the solvent from dripping.

As shown in fig. 1-2, one end of the liquid taking pipe 33, which is far away from the liquid carrying cup 31, is provided with a constant volume pipe 34, and the tail end of the constant volume pipe 34 is of a closing-in structure.

As shown in fig. 1 and 3, a placement groove 14 is formed in the base 1, and the sampling assembly 2 and the constant volume assembly 3 are both located outside the placement groove 14.

As shown in fig. 1 and 3, a plurality of circular grooves 15 are arranged on the inner side of the placement groove 14, the grooves 15 are distributed along the length direction of the placement groove 14, and adjacent grooves 15 are not connected.

In the utility model, the specific model of the air extractor, the liquid extracting device and the like is not an improvement point created by the utility model, and the installation and connection modes are conventional connection and are not repeated here.

The using method comprises the following steps: firstly preparing solvent solution for constant volume and filling the solvent solution into a liquid carrying cup, placing an instrument for constant volume into a placing groove or a groove (if the instrument for constant volume is a test tube, the instrument for constant volume can be firstly arranged on a test tube rack and then arranged on a bottom plate); the tail end of the sampling tube is placed in a sample solution to be diluted, the air extractor is started, the sample solution is pumped into the sampling tube, when the sample solution entering the sampling tube reaches a specified line, the air extractor close to one end of the sampling tube is pinched to avoid continuous air extraction and sampling, the sampling tube is lifted up and extends into an appliance to be fixed in volume, the air extractor is detached from the sampling tube, and the sampling tube can be taken out after the sample solution completely flows into the appliance to be fixed in volume; in order to improve the sampling efficiency, 2-5 sampling tubes can be used up, and after sampling is finished, the sampling tubes are obliquely inserted into the to-be-fixed-volume device, so that sample solution automatically flows into the to-be-fixed-volume device from the sampling tubes; and then sampling the next sample by using a new sampling tube, and repeating the operation in the way to finish the sampling of the sample. For sampling of batch samples, the use of a plurality of sampling tubes (preferably 1 sample corresponds to 1 sampling tube) can avoid the need of washing with pure water after the sampling tube is used, and avoid the pollution caused by sampling, thereby greatly improving the operation efficiency.

Before or after the constant volume of the liquid taking pipe is not fixed, the liquid taking pipe is clamped by the clamp and hung on the mounting rod, and when the constant volume is needed, the clamp is loosened, and the liquid taking pipe is taken out. When the constant volume is achieved, one end of the liquid taking pipe is immersed in the solvent of the liquid carrying cup, and the other end of the liquid taking pipe penetrates through the liquid taking device (namely, is clamped on a pump head of the peristaltic pump) and enables the constant volume pipe to extend above an appliance to be constant volume; starting the liquid taking device, enabling the solvent to flow into the constant volume pipe through the liquid taking pipe, flowing into the constant volume device from the tail end of the constant volume pipe, pinching the liquid taking pipe when the tangent line of the liquid level of the solution in the constant volume device reaches the line position, taking out the constant volume pipe, covering the constant volume device with a plug, and shaking uniformly to finish the diluting constant volume operation. When more samples are to be diluted and the fixed volume are needed, the samples are sampled into the container to be fixed, and then the fixed volume and shaking operation are carried out one by one, so that the operation efficiency is improved; and after the operation is finished, the power supplies of the air extracting device and the liquid taking device are turned off.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The diluting and constant-volume device comprises a base (1), wherein a fixed rod (11) is arranged on the base (1), and a mounting rod (12) is arranged on the fixed rod (11), and is characterized by further comprising a sampling assembly (2) and a constant-volume assembly (3);

the sampling assembly (2) comprises an air extracting device (21), an air extracting pipe (22) and a sampling pipe (23);

the air extraction device (21) is provided with the air extraction pipe (22), the tail end of the air extraction pipe (22) is provided with the sampling pipe (23), and the sampling pipe (23) is movably arranged on the mounting rod (12);

the constant volume component (3) comprises a liquid carrying cup (31), a liquid taking device (32) and a liquid taking pipe (33);

the liquid carrying cup (31) is arranged on the side surface of the liquid taking device (32), one end of the liquid taking pipe (33) extends into the liquid carrying cup (31) through the liquid taking device (32), and the other end of the liquid taking pipe (33) is movably arranged on the mounting rod (12);

the air extractor (21), the liquid carrying cup (31) and the liquid taking device (32) are respectively arranged on two sides of the base (1).

2. A dilution and constant volume device according to claim 1, wherein the sampling assembly (2) further comprises a buffer bottle (24), two branch pipe ports (25) are arranged on two sides of the buffer bottle (24), one branch pipe port (25) is connected with the air extraction device (21), and the other branch pipe port (25) is connected with the sampling pipe (23).

3. The diluting and constant volume device according to claim 2, wherein a clamping groove (26) is formed in one end, close to the sampling assembly (2), of the mounting rod (12), an elastic layer is arranged in the clamping groove (26), and the clamping groove (26) is used for movably clamping the sampling tube (23) on the mounting rod (12).

4. A dilution metering device according to claim 3, characterized in that the mounting rod (12) is provided with a clamp (13) at one end thereof adjacent to the metering assembly (3), the clamp (13) being adapted to clamp the end of the tapping tube (33).

5. The diluting and constant-volume device according to claim 4, wherein a constant-volume tube (34) is arranged at one end of the liquid taking tube (33) away from the liquid carrying cup (31), and the end of the constant-volume tube (34) is of a closing-in structure.

6. A dilution volumetric device according to any one of claims 1-5, characterized in that the base (1) is provided with a holding groove (14), and the sampling assembly (2) and the volumetric assembly (3) are both located outside the holding groove (14).

7. The diluting and constant volume device according to claim 6, wherein a plurality of circular grooves (15) are formed in the inner side of the placement groove (14), the grooves (15) are distributed along the length direction of the placement groove (14), and adjacent grooves (15) are not connected.