CN116889894B - Rubber head dropper with switchable liquid drop sizes - Google Patents
Rubber head dropper with switchable liquid drop sizesInfo
- Publication number
- CN116889894B CN116889894B CN202310928311.3A CN202310928311A CN116889894B CN 116889894 B CN116889894 B CN 116889894B CN 202310928311 A CN202310928311 A CN 202310928311A CN 116889894 B CN116889894 B CN 116889894B
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- Prior art keywords
- conical
- pipe
- dropper
- funnel
- port
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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
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0213—Accessories for glass pipettes; Gun-type pipettes, e.g. safety devices, pumps
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- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Pipe Accessories (AREA)
Abstract
一种液滴大小可切换的胶头滴管，滴管的一端设置有橡胶材质的气囊、另一端为锥形端，滴管的锥形端外中部设置有连接管，滴管的锥形端口位于连接管内且在锥形端口上设置有锥形管，连接管内通过连接杆固定有漏斗形管，滴管、连接管、锥形管、漏斗形管的中心线重合，漏斗形管上端口上设置有小端向下的锥形盖，锥形盖的中心加工有漏液孔，锥形管与锥形盖之间留有一定宽度的间隙，漏斗形管的内腔由上圆柱形腔和下圆柱形腔连为一体组成，本发明即可实现微小液滴的滴加，同时能够采用缓慢吸液方式实现常规大液滴的滴加。本发明具有结构简单、操作简便、成本低的优点。
A dropper with adjustable droplet size is disclosed. One end of the dropper has a rubber air bladder, and the other end is tapered. A connecting tube is located at the center of the tapered end of the dropper. The tapered port of the dropper is located inside the connecting tube, and a tapered tube is attached to the tapered port. A funnel-shaped tube is fixed inside the connecting tube by a connecting rod. The centerlines of the dropper, connecting tube, tapered tube, and funnel-shaped tube coincide. A tapered cap with the smaller end facing downwards is located at the upper end of the funnel-shaped tube. A leakage hole is machined in the center of the tapered cap. A certain width gap is left between the tapered tube and the tapered cap. The inner cavity of the funnel-shaped tube consists of an upper cylindrical cavity and a lower cylindrical cavity connected as one unit. This invention can achieve the addition of tiny droplets, and can also achieve the addition of conventional large droplets using a slow liquid aspiration method. This invention has the advantages of simple structure, easy operation, and low cost.
Description
Technical Field
The invention belongs to the technical field of laboratory instruments, and particularly relates to a rubber head dropper with switchable liquid drop sizes.
Background
The rubber head dropper is also called as a rubber cap dropper, has a simple structure and is mainly used for transferring and dripping a small amount of liquid. Typically, existing rubber head droppers are single in drop size when in use, with 20 drops of about 1 milliliter. The rubber head dropper can solve the problem that the volume of a single liquid drop needs to be reduced for micro-addition in the practical application process, and can also need to be matched with a plurality of liquid drops with different sizes to finish the addition. The size of the liquid drops is determined by the outlet pipe diameter of the rubber head dropper, the liquid drops with different sizes are difficult to switch by a single conventional rubber head dropper, the size of the liquid drops is changed by selecting droppers with different pipe diameters in a conventional mode, the operation steps are increased, and the experimental efficiency is reduced. At present, there is an urgent need for a rubber head dropper capable of switching large and small liquid drops without replacing the dropper.
Disclosure of Invention
The invention aims to overcome the defects of the traditional rubber head dropper and provide the rubber head dropper with the switchable liquid drop size, which has the advantages of simple structure, convenient operation and low cost.
The technical scheme includes that the rubber head dropper with the switchable liquid drops is characterized in that an air bag made of rubber is arranged at one end of the dropper, a conical end is arranged at the other end of the dropper, a connecting pipe and a conical pipe are connected to a conical port of the dropper, the conical pipe is located in the connecting pipe, a funnel-shaped pipe is fixed below the conical pipe through a connecting rod, the central lines of the dropper, the connecting pipe, the conical pipe and the funnel-shaped pipe coincide, the inner diameter of a conical port of the dropper=the inner diameter of a large port of the conical pipe=the inner diameter of the connecting pipe, a conical cover with a small end facing downwards is arranged on an upper port of the funnel-shaped pipe, the conical cover is connected with the funnel-shaped pipe into a whole, a liquid leakage hole is formed in the center of the conical cover, a gap with a certain width is reserved between the conical pipe and the conical cover, the inner cavity of the funnel-shaped pipe is formed by connecting an upper cylindrical cavity and a lower cylindrical cavity into a whole, the diameter of the upper cylindrical cavity is larger than the inner diameter of the small port of the conical pipe is larger than the liquid leakage hole is smaller than the diameter of the lower cylindrical cavity, and the diameter of the upper cylindrical cavity=the inner diameter of the large port is smaller than the conical cover.
As a preferable technical scheme, the inner diameter of the small port of the conical tube is 1/3-1/2 times of the inner diameter of the large port, and the taper is 30-60 degrees.
As a preferable technical scheme, the aperture of the liquid leakage hole is 1/5-1/4 times of the inner diameter of the connecting pipe.
As a preferable technical scheme, the diameter of the upper cylindrical cavity is 2/3-4/5 times of the inner diameter of the connecting pipe, and the length is 20-30 mm.
As a preferable technical scheme, the diameter of the lower cylindrical cavity is 1/6-1/4 times of the inner diameter of the connecting pipe, and the length is 20-30 mm.
As a preferable technical scheme, the width of the gap between the conical tube and the conical cover is 2-4 mm.
The beneficial effects of the invention are as follows:
1. According to the invention, the funnel-shaped pipe is arranged in the connecting pipe, the hollow part is formed in the funnel-shaped pipe by adjusting the liquid suction rate, the hollow part can effectively prevent liquid in the funnel-shaped pipe from rising, and the liquid in the funnel-shaped pipe is discharged at first when the air bag is extruded, so that tiny liquid drop discharging is realized. The funnel-shaped pipe can be filled with liquid through slow liquid suction, no hollowness exists, liquid drops drop out of the funnel-shaped pipe and the annular cavity when the air bag is extruded to drop, and conventional large-liquid drop discharging is achieved. The single dropper can realize the discharge of large and small liquid drops.
2. The connecting pipe has no flowing dead zone, and is convenient to clean.
3. The invention has the advantages of simple structure, simple and convenient operation and low cost.
Drawings
FIG. 1 is a schematic diagram of a droplet size switchable rubber head dropper according to the present invention.
Fig. 2 is a partial enlarged view of a in fig. 1.
Wherein, the air bag 1, the dropper 2, the funnel-shaped pipe 3, the connecting pipe 4, the connecting rod 5, the conical pipe 6, the conical cover 7, the upper cylindrical cavity a, the lower cylindrical cavity b, the annular cavity c and the liquid leakage hole d.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to the following embodiments.
In fig. 1 and 2, a rubber head dropper with switchable droplet sizes in this embodiment is formed by connecting an air bag 1, a dropper 2, a funnel-shaped pipe 3, a connecting pipe 4, a connecting rod 5 and a conical pipe 6. One end of the dropper 2 is provided with an air bag 1, the other end is a conical end, the dropper 2 and the air bag 1 are connected into a whole, the material of the air bag 1 is rubber, a connecting pipe 4 and a conical pipe 6 are connected to the conical port of the dropper 2, the conical pipe 6 is positioned in the connecting pipe 4, a funnel-shaped pipe 3 is fixed in the connecting pipe 4 through a connecting rod 5, an annular cavity c is formed between the funnel-shaped pipe 3 and the connecting pipe 4, the central lines of the dropper 2, the connecting pipe 4, the conical pipe 6 and the funnel-shaped pipe 3 are overlapped, the inner diameter of the conical port of the dropper 2 = the inner diameter of the large port of the conical pipe 6 = the inner diameter of the connecting pipe 4, the inner cavity of the funnel-shaped pipe 3 is formed by connecting an upper cylindrical cavity a and a lower cylindrical cavity b, the upper port of the conical cover 7 is provided with a conical cover 7 with a small end downward, the funnel-shaped pipe 3 and the conical cover 7 are connected into a whole, a liquid leakage hole d is processed in the center of the conical cover 7, and a gap with a width of 4mm is reserved between the conical pipe 6 and the conical cover 7. The annular cavity c formed between the funnel-shaped pipe 3 and the connecting pipe 4 is communicated with the inner cavity of the funnel-shaped pipe 3 through a gap between the conical pipe 6 and the conical cover 7, and the diameter of the upper cylindrical cavity is equal to the diameter of the small port of the conical pipe, the diameter of the weeping hole is equal to the diameter of the lower cylindrical cavity.
The inner diameter of the small port of the conical tube 6 is 5/12 times of the inner diameter of the large port, the taper is 45 degrees, the diameter of the upper cylindrical cavity a is 11/15 times of the inner diameter of the connecting tube 4, the length is 25mm, the diameter of the lower cylindrical cavity b is 5/24 times of the inner diameter of the connecting tube 4, the length is 25mm, and the aperture of the liquid leakage hole d is 9/40 times of the inner diameter of the connecting tube 4.
The working principle of the invention is as follows:
(1) The air in the dropper 2 is discharged by extruding the air bag 1, the connecting pipe 4 is inserted below the liquid level to be taken, part of the air bag 1 is loosened, the liquid is slowly absorbed until the liquid level reaches the upper port of the lower cylindrical cavity b of the funnel-shaped pipe 3, and then the liquid is absorbed at a higher speed, and the liquid level of the annular space between the position of the upper cylindrical cavity a of the funnel-shaped pipe 3 and the connecting pipe 4 rises faster because the cross section area of the annular space between the position of the lower cylindrical cavity b of the funnel-shaped pipe 3 and the connecting pipe 4 is smaller than that of the annular space between the position of the lower cylindrical cavity b and the connecting pipe 4. At the same time, the cross-sectional area of the upper cylindrical chamber a is larger than that of the lower cylindrical chamber b, and the liquid level of the upper cylindrical chamber a rises slowly. When liquid is present at the small port of the conical tube 6, the liquid suction is stopped, and at this time, the upper cylindrical cavity a of the funnel tube is filled with air, and the lower cylindrical cavity b is filled with liquid.
(2) The invention is moved out of the liquid level, the air bag 1 is continuously loosened, the liquid in the annular gap between the funnel-shaped pipe 3 and the connecting pipe 4 rises into the dropper 2, and the liquid level at the lower end of the liquid in the annular gap between the funnel-shaped pipe 3 and the connecting pipe 4 stops when the liquid level rises to the upper port position of the funnel-shaped pipe 3. At this time, since the air is stored in the upper portion of the cylindrical chamber a, the liquid in the lower portion thereof does not rise.
(3) The invention is transferred to the position above the liquid to be dripped, the position is adjusted to enable the dropper 2 to be vertical, the air sac is extruded, the liquid stored in the lower cylindrical cavity b of the funnel-shaped pipe 3 moves downwards at first and flows out from the lower port to form tiny liquid drops, meanwhile, the liquid level between the annular gap of the funnel-shaped pipe 3 and the connecting pipe 4 moves downwards to gradually supplement the annular gap, the air sac 1 is stopped from being extruded, the liquid does not flow out of the funnel-shaped pipe 3 any more, and the flow rate is controlled by adjusting the extrusion rate.
According to the invention, the funnel-shaped pipe 3 is arranged in the connecting pipe 4, the hollow is formed in the funnel-shaped pipe 3 by adjusting the liquid suction rate, the hollow can effectively prevent liquid in the funnel-shaped pipe 3 from rising, and the liquid in the funnel-shaped pipe 3 is discharged at first when the air bag 1 is extruded, so that tiny liquid drops are discharged. The funnel-shaped pipe 3 is filled with liquid through slow liquid suction, no hollowness appears, and liquid drops simultaneously drop out from the funnel-shaped pipe 3 and the annular cavity when the air bag 1 is extruded for dropping liquid, so that the conventional large-liquid drop discharging is realized. The single dropper can realize the discharge of the large and small liquid drops, and the operation is simple.
Example 2
In this embodiment, one end of the dropper 2 is provided with the air bag 1, the other end is a conical end, the dropper 2 and the air bag 1 are connected into a whole, the material of the air bag 1 is rubber, the middle part outside the conical end of the dropper is provided with the connecting pipe 4, the conical port of the dropper is positioned in the connecting pipe 4 and is provided with a conical pipe on the conical port, the funnel 3 is fixed in the connecting pipe 4 through the connecting rod 5, an annular cavity c is formed between the funnel 3 and the connecting pipe 4, the dropper, the connecting pipe 4, the conical pipe and the central line of the funnel 3 coincide, the inner diameter of the conical port of the dropper = the inner diameter of the conical pipe = the inner diameter of the connecting pipe 4, the inner diameter of the small port of the conical pipe 6 is 1/3 times the inner diameter of the large port, the taper is 30 degrees, the inner cavity of the funnel 3 is formed by connecting an upper cylindrical cavity a and a lower cylindrical cavity b integrally, the diameter of the upper cylindrical cavity a is 2/3 times the inner diameter of the connecting pipe 4, the length is 20mm, the diameter of the lower cylindrical cavity b is 1/6 times the inner diameter of the connecting pipe 4, the length is 20mm, a conical cover 7 with the small end downwards is arranged on the upper port of the funnel 3, the conical cover 7 has the inner diameter = the inner diameter of the large port of the upper cylindrical cavity a3, the diameter of the conical cover 3 = the inner diameter of the large port of the conical cavity 3, the inner diameter of the conical cover is 1/3 is 3, the inner diameter of the conical cover is 3 d is the inner diameter of the conical hole is 4, the inner diameter of the conical hole is 3 d is 4 is the diameter of the inner diameter of the cone is. An annular cavity c is formed between the funnel-shaped pipe 3 and the connecting pipe 4 and is communicated with the inner cavity of the funnel-shaped pipe 3 through a gap between the conical pipe and the conical cover 7.
Example 3
In this embodiment, one end of the dropper 2 is provided with the gasbag 1, the other end is the conical end, the dropper 2 is connected with the gasbag 1 as an organic whole, the material of gasbag 1 is rubber, the outer middle part of conical end of dropper 2 is provided with connecting pipe 4, the conical port of dropper 2 is located connecting pipe 4 and is provided with the conical tube on the conical port, be fixed with funnel 3 through connecting rod 5 in connecting pipe 4, form annular chamber c between funnel 3 and the connecting pipe 4, the dropper, connecting pipe 4, the conical tube, the central line coincidence of funnel 3, the conical port internal diameter = conical tube major port internal diameter = connecting pipe 4 internal diameter, the minor port internal diameter of conical tube 6 is 1/2 times of major port internal diameter, the tapering is 60, the inner chamber of funnel 3 is formed by connecting upper cylindrical chamber a and lower cylindrical chamber b as an organic whole, the diameter of upper cylindrical chamber a is 4/5 times of connecting pipe 4 internal diameter, the length is 30mm, the diameter of lower cylindrical chamber b is 1/4 times of connecting pipe 4 internal diameter, be 30mm, be provided with tip decurrent cone cover 7 on the upper port of funnel 3, the major port internal diameter = upper end major port diameter of cone cover 7, the major port internal diameter = upper end diameter of cone 7, the major port internal diameter = 1/2 times of major port internal diameter of major port is 3d, the annular chamber 7 is formed between the annular chamber 7 d and the conical cover is formed by the annular chamber 3d and the annular chamber 3, the annular chamber is formed by the gap between the cone cover and the conical cover 3d and the conical cover is 3d, the annular chamber is formed by the annular chamber 3d, the gap between the inner diameter and the cone cover is 3 and the conical cover is formed.
Claims (6)
1. A rubber head dropper with switchable liquid drop sizes is characterized in that a connecting pipe and a conical pipe are connected to a conical port of the dropper, the conical pipe is located in the connecting pipe, a funnel-shaped pipe is fixed below the conical pipe through a connecting rod in the connecting pipe, the central lines of the dropper, the connecting pipe, the conical pipe and the funnel-shaped pipe are coincident, the inner diameter of the conical port of the dropper=the inner diameter of the large port of the conical pipe=the inner diameter of the connecting pipe, a conical cover with a downward small end is arranged on the upper port of the funnel-shaped pipe, the conical cover is connected with the funnel-shaped pipe into a whole, a liquid leakage hole is machined in the center of the conical cover, a gap with a certain width is reserved between the conical pipe and the conical cover, an inner cavity of the funnel-shaped pipe is formed by connecting an upper cylindrical cavity and a lower cylindrical cavity into a whole, the diameter of the upper cylindrical cavity is equal to the inner diameter of the small port of the conical pipe, the diameter of the liquid leakage hole is equal to the diameter of the lower cylindrical cavity, and the diameter of the upper cylindrical cavity is equal to the inner diameter of the large port of the conical cover.
2. The switchable droplet size rubber head dropper of claim 1, wherein the inner diameter of the small port of the conical tube is 1/3-1/2 times that of the large port, and the taper is 30-60 degrees.
3. The switchable droplet size rubber head dropper of claim 1, wherein the aperture of the weeping hole is 1/5-1/4 times the inner diameter of the connecting pipe.
4. The switchable droplet size rubber head dropper of claim 1, wherein the diameter of the upper cylindrical cavity is 2/3-4/5 times the inner diameter of the connecting pipe, and the length is 20-30 mm.
5. The switchable droplet size rubber head dropper of claim 1, wherein the diameter of the lower cylindrical cavity is 1/6-1/4 times the inner diameter of the connecting pipe, and the length is 20-30 mm.
6. The glue head dropper with switchable liquid drop sizes according to claim 1, wherein the gap width between the conical tube and the conical cover is 2-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310928311.3A CN116889894B (en) | 2023-07-27 | 2023-07-27 | Rubber head dropper with switchable liquid drop sizes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310928311.3A CN116889894B (en) | 2023-07-27 | 2023-07-27 | Rubber head dropper with switchable liquid drop sizes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116889894A CN116889894A (en) | 2023-10-17 |
| CN116889894B true CN116889894B (en) | 2025-12-09 |
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ID=88314792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310928311.3A Active CN116889894B (en) | 2023-07-27 | 2023-07-27 | Rubber head dropper with switchable liquid drop sizes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116889894B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603946A (en) * | 2019-01-31 | 2019-04-12 | 西北大学 | Glue tip dropper for adjusting droplet size and adjusting method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4974067B2 (en) * | 2004-12-28 | 2012-07-11 | 株式会社吉野工業所 | Spoid discharge container |
| CA2710904A1 (en) * | 2010-07-23 | 2012-01-23 | Norgen Biotek Corp. | Methods and devices for rapid urine concentration |
| CN203955251U (en) * | 2014-07-15 | 2014-11-26 | 何节玉 | A kind ofly be inverted, etch-proof metering dropper |
| CN206121776U (en) * | 2016-09-22 | 2017-04-26 | 长春师范大学 | Dropping liquid ware and experimental apparatus for chemistry experiments |
| CN109649820B (en) * | 2017-10-12 | 2020-11-03 | 万通(苏州)定量阀系统有限公司 | Fluid dispenser |
| CN212915718U (en) * | 2020-07-14 | 2021-04-09 | 湖州师范学院求真学院 | Device for assisting dropper to control dropping speed |
-
2023
- 2023-07-27 CN CN202310928311.3A patent/CN116889894B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603946A (en) * | 2019-01-31 | 2019-04-12 | 西北大学 | Glue tip dropper for adjusting droplet size and adjusting method thereof |
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| Publication number | Publication date |
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| CN116889894A (en) | 2023-10-17 |
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