CN210036866U - An externally mounted rotary meter - Google Patents

Abstract

The utility model discloses an externally mounted rotary mouth quantitative device, which relates to the technical field of quantitative sampling and solves the problems that the connection between the quantitative device main body and the reagent bottle of the existing liquid quantitative device is easy to loosen and the built-in type cannot be used for all the reagent bottles. The utility model includes a reagent bottle, a quantitative cylinder and a bottle cap, and is characterized in that: the bottle mouth of the reagent bottle is provided with an external thread, the side wall of the bottle cap is provided with an internal thread, and the quantitative cylinder includes a scale marked with a scale. A liquid drain pipe, the bottom of the liquid drain pipe is connected with a liquid suction pipe, the liquid suction pipe is inserted into the reagent bottle through the bottle cap, the liquid filling pipe protrudes from the side wall of the liquid discharge pipe, and a plunger is inserted in the liquid discharge pipe , a metal rod is arranged in parallel on the side of the plunger, and a limit block is fixed on the metal rod. The utility model adopts the screw cap to replace the glass stopper or the rubber stopper, the connection is more firm, and the external design is adopted, and there is no requirement on the size of the bottle mouth of the reagent bottle.

Description

An externally mounted rotary meter

technical field

The utility model relates to the technical field of quantitative sampling, in particular to an externally mounted rotary mouth quantitative device.

Background technique

Liquid dosing device is a device suitable for continuous quantitative addition of various test solutions, radioisotopes, biological agents, etc., in laboratories of hospitals, colleges, scientific research and other units during chemical analysis experiments. The liquid meter is composed of two parts: the liquid storage bottle and the main body of the meter. The external installation type is to install the syringe barrel with the water outlet pipe and the water inlet pipe of the one-way automatic piston together with the positioning stem and the positioning sleeve with the scale mark. There are metal scale marks and removable positioning sleeves on the top of the syringe to control the accuracy of the amount of test solution added. The reagent bottle is a glass bottle used to store the test solution.

However, in the prior art, the main body of the quantizer of the liquid quantizer is connected to the reagent bottle by means of a rubber stopper or a glass stopper, which is easy to separate the main body of the quantifier from the reagent bottle during use, and the fixation is not reliable, posing a potential safety hazard, and Most of the reagents taken by the quantitative device are strong oxidizing and corrosive reagents, and the connection of the bottle mouth is easily corroded and loosened. And most liquid quantizers are built-in quantizers, that is, most of the quantizer body is located in the reagent bottle, which requires a reagent bottle with a larger bottle mouth, which is not suitable for all reagent bottles.

Utility model content

The purpose of the present utility model is: in order to solve the problem that the connection between the quantitative device main body and the reagent bottle of the existing liquid quantitative device is easy to loosen and the built-in type cannot be used for all the reagent bottles, the present utility model provides an externally mounted rotary mouth quantitative device.

The utility model specifically adopts the following technical solutions in order to achieve the above-mentioned purpose:

An externally mounted screw-top quantitative device includes a reagent bottle, a quantitative cylinder and a bottle cap, characterized in that: the bottle mouth of the reagent bottle is provided with an external thread, the side wall of the bottle cap is provided with an internal thread, and the quantitative cylinder includes A drain pipe marked with a scale, a part of the top of the drain pipe protrudes horizontally, a suction pipe is connected to the bottom of the drain pipe, the suction pipe is inserted into the reagent bottle through the bottle cap, and the side wall of the drain pipe extends out There is a liquid filling pipe, a plunger is inserted in the liquid discharge pipe, a metal rod is arranged in parallel on the side of the plunger, a limit block is fixed on the metal rod, and the suction pipe is provided with a one-way valve that opens toward the liquid discharge pipe , the liquid addition pipe is provided with a one-way valve that opens away from the liquid discharge pipe.

Working principle: After the quantitative cylinder is inserted into the bottle cap, install the bottle cap on the reagent bottle and tighten, and finally insert the plunger into the drainage tube of the quantitative cylinder, and the installation is completed. Since both the plunger and the dosing cylinder are made of glass, errors will occur when the glass is formed. Therefore, the position of the limit block on the metal rod is adjusted according to the specific size of each installed dosing cylinder before leaving the factory. The position is fixed and cannot be moved.

When taking out the liquid in the reagent bottle, lift the plunger and stop when it reaches the specified scale of the required reagent volume. The reagent is sucked into the pipette and then flows into the discharge pipe, and then the plunger is pressed down. One-way valve, the reagent passes through the liquid outlet pipe to the outer container.

Further, the surface of the portion of the quantitative cylinder in contact with the bottle cap is set as a frosted surface, and the surface of the plunger is set as a frosted surface.

Further, the bottle cap is provided with a through hole for ventilation.

Further, the bottle cap is provided with a slope at the position in contact with the quantitative cylinder to increase the contact area between the drain tube and the bottle cap, and glue for bonding is filled between the slope and the drain tube.

Further, thick-bottomed reagent bottles with better stability can be selected for the reagent bottles, and transparent reagent bottles or brown reagent bottles can be selected according to whether the reagents stored in the bottles are easily decomposed when exposed to light.

The beneficial effects of the present utility model are as follows:

1. The utility model adopts the screw cap to replace the traditional glass stopper and rubber stopper, which makes the connection between the quantitative device and the reagent bottle more reliable, and the installation and disassembly are very convenient.

2. The utility model adopts the exterior design of the quantitative cylinder, only the pipette part of the quantitative cylinder extends into the reagent bottle, there is no requirement for the size of the bottle mouth of the reagent bottle, and the scope of application is wide.

3. There is a slope at the position where the bottle cap is in contact with the quantitative cylinder and is filled with glue for bonding, and the surface of the part where the quantitative cylinder is in contact with the bottle cap is set to a frosted surface, so that the connection between the quantitative cylinder and the bottle cap is more reliable, avoiding loose.

4. The surface of the plunger is set as a frosted surface, which increases the friction between the plunger and the inner wall of the dosing cylinder, and prevents the plunger from slipping too much and causing errors in the amount of reagent taken.

5. The bottle cap is provided with a through hole for ventilation, so that the pressure inside and outside the reagent bottle is consistent, so that the plunger can be pulled freely to take the reagent.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the structural representation of quantitative cylinder;

Fig. 3 is the structural representation of plunger;

Fig. 4 is the structural representation of bottle cap;

Reference numerals: 1-reagent bottle; 2-bottle cap; 21-through hole; 22-slope; 3-dosing cylinder; 31-liquid outlet pipe; 32-discharge pipe; 33-check valve; Tube; 4-Plunger; 5-Metal Rod; 6-Limit Block.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present utility model.

Example 1

As shown in Figures 1 to 3, the present embodiment provides an externally mounted screw-top quantitative device, including a reagent bottle 1, a quantitative cylinder 3 and a bottle cap 2, characterized in that: the bottle mouth of the reagent bottle 1 is provided with an external thread, The side wall of the bottle cap 2 is provided with an internal thread, the quantitative cylinder 3 includes a drain pipe 32 marked with a scale, a part of the top of the drain pipe 32 protrudes horizontally, and a suction pipe 34 is connected to the bottom of the drain pipe 32 , the suction pipe 34 is inserted into the reagent bottle 1 through the bottle cap 2, a liquid addition pipe 31 protrudes from the side wall of the liquid discharge pipe 32, a plunger 4 is inserted in the liquid discharge pipe 32, and the sides of the plunger 4 are parallel to each other. A metal rod 5 is provided on which a limiting block 6 is fixed, the suction pipe 34 is provided with a one-way valve 33 that opens towards the liquid discharge pipe, and the liquid addition pipe 31 is provided with a direction away from the liquid discharge pipe. Open one-way valve 33.

Example 2

As shown in Figures 1 to 3, this embodiment is further improved on the basis of Embodiment 1. Specifically, the surface of the part of the quantitative cylinder 3 in contact with the bottle cap 2 is set to a frosted surface, which increases the size of the suction pipe and the The friction force of the bottle cap prevents the positioning cylinder from sliding; the surface of the plunger 4 is set as a frosted surface, which increases the friction between the plunger and the inner wall of the dosing cylinder, and prevents the plunger from sliding too much and causing errors in the dosage of the reagent.

The bottle cap is provided with a through hole 21 for ventilation, so that the pressure inside and outside the reagent bottle can be kept the same, and the plunger can be pulled freely to take the reagent.

Example 3

As shown in Figures 1 to 3, this embodiment is further improved on the basis of Embodiment 1 and Embodiment 2. Specifically, the bottle cap is provided with an enlarged drain pipe 32 and a The slope 22 of the contact area of the bottle cap 2 is filled with glue for bonding between the slope 22 and the drain pipe 32, so that the connection between the dosing cylinder and the bottle cap is more firm, and loosening is avoided.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. The patent protection scope of the present utility model is subject to the claims. Equivalent structural changes should be included in the protection scope of the present invention.

Claims (4)

1. An externally mounted screw mouth quantitative device, comprising a reagent bottle (1), a quantitative cylinder (3) and a bottle cap (2), characterized in that: the bottle mouth of the reagent bottle (1) is provided with an external thread, and the The side wall of the bottle cap (2) is provided with an internal thread, the quantitative cylinder (3) includes a drain pipe (32) marked with a scale, and a part of the top of the drain pipe (32) protrudes horizontally, and the drain pipe (32) ) bottom is communicated with a suction pipe (34), the suction pipe (34) is inserted into the reagent bottle (1) through the bottle cap (2), and a liquid addition pipe (31) extends from the side wall of the discharge pipe (32). ), a plunger (4) is inserted in the drain pipe (32), a metal rod (5) is arranged parallel to the side of the plunger (4), and a limit block (6) is fixed on the metal rod, and the suction The pipe (34) is provided with a one-way valve (33) that opens toward the liquid discharge pipe, and the liquid addition pipe (31) is provided with a one-way valve (33) that opens away from the liquid discharge pipe. 2. A kind of externally mounted rotary mouth quantitative device according to claim 1, it is characterized in that: the surface of the part where the quantitative cylinder (3) is in contact with the bottle cap (2) is set as a frosted surface, and the surface of the plunger (4) Set to frosted surface. 3 . The externally mounted rotary mouth metering device according to claim 1 , wherein the bottle cap is provided with a through hole ( 21 ) for ventilation. 4 . 4. A kind of externally mounted rotary mouth quantitative device according to claim 1, is characterized in that: described bottle cap is provided with enlarged drain pipe (32) and bottle cap ( 2) The slope (22) of the contact area, the glue for bonding is filled between the slope (22) and the drain pipe (32).

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