阅读说明：本技术 一种防漏滴滴定管、系统及其使用方法 (Anti-drip burette, system and use method thereof ) 是由 魏春阳 曾静 陈宁娜 伍书军 夏昌勇 肖哲栋 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种防漏滴滴定管,包括竖直设置的滴定管本体,其上部为滴定液注入端,下部为滴定管管体,滴定液注入端的横截面积大于滴定管管体,滴定液注入端顶部开设两开孔,其中第一开孔与开关连接,由开关控制第一开孔的开闭,第二开孔插有第一连接管,滴定液控制装置通过第一连接管与滴定管本体连通,滴定管管体底部与U型滴定管连通,U型滴定管尖端朝下,滴定管管体上带有刻度线。本发明以U型毛细玻璃滴定管代替活塞旋钮,利用连通器原理,在滴定液控制装置和管路的配合下,实现控制气路、液路分离,进行滴定操作,从根本上杜绝了漏滴问题。(The invention discloses a burette with leakage prevention, which comprises a burette body which is vertically arranged, wherein the upper part of the burette body is provided with a titrant injection end, the lower part of the burette body is provided with a burette tube body, the cross section area of the titrant injection end is larger than that of the burette tube body, the top of the titrant injection end is provided with two openings, the first opening is connected with a switch, the switch controls the opening and closing of the first opening, the second opening is inserted with a first connecting pipe, a titrant control device is communicated with the burette body through the first connecting pipe, the bottom of the burette tube body is communicated with a U-shaped burette, the tip of the U-shaped burette is downward, and the burette tube body is provided with scale marks. The invention uses the U-shaped capillary glass burette to replace a piston knob, utilizes the principle of a communicating vessel, realizes the separation of a control gas circuit and a control liquid circuit under the coordination of a titration liquid control device and a pipeline, carries out titration operation, and fundamentally avoids the problem of drop leakage.)

1. The utility model provides a leak protection buret, a serial communication port, buret body including vertical setting, its upper portion is the buret body of titrating liquid injection end, the lower part is the buret body, the cross-sectional area of titrating liquid injection end is greater than the buret body, two trompils are seted up at titrating liquid injection end top, wherein first trompil is connected with the switch, by the switching of the first trompil of on-off control, first connecting pipe has been inserted to the second trompil, the buret controlling means passes through first connecting pipe and buret body intercommunication, buret body bottom and U type buret intercommunication, U type buret is most advanced down, have the scale mark on the buret body.

2. The drip resistant burette of claim 1, wherein the switch is a silicone cap.

3. The drip resistant burette of claim 1, wherein the U-shaped burette is a capillary glass burette.

4. The drip resistant burette of claim 1, wherein the U-shaped burette tip is taller than the highest point of the graduation marks.

5. A drip resistant burette as claimed in claim 1, wherein the first connecting tube is a silicone tube.

6. A method of using a leak resistant burette as claimed in claim 1, comprising the steps of:

the burette comprises a burette body, a titration liquid control device, a connecting pipe, a titration liquid control device and a U-shaped burette body, wherein the titration liquid control device is connected with the burette body through the connecting pipe, the titration liquid is added into the burette body until the titration liquid is higher than the highest point of a scale mark and lower than the tip of the U-shaped burette, the titration liquid can not be dripped out under the action principle of a communicating vessel, a switch is closed, the titration liquid control device pressurizes the inside of the burette body, the titration liquid begins to be dripped out at the tip of the U-shaped pipe under the action of pressure, and finally, the titration operation is carried out through the titration liquid control device.

7. A leak-proof burette system, comprising the leak-proof burette as claimed in claim 1, wherein the bottom of the titration liquid control device is communicated with the liquid storage bottle through a second connecting pipe, the pipe orifice of the second connecting pipe is arranged at the bottle orifice of the liquid storage bottle, one end of a third connecting pipe is inserted into the first opening, the other end of the third connecting pipe is inserted into the liquid storage bottle, and the pipe orifice of the third connecting pipe is arranged at the bottom of the liquid storage bottle; the switch is arranged in the burette body.

8. The leak resistant burette system of claim 7 wherein a shut-off valve is disposed on each of the first and second connecting tubes.

9. The leak resistant burette system of claim 7 wherein the switch is a one-way check valve.

10. A method of using a leak resistant burette system as defined in claim 7, comprising the steps of:

when the titration liquid control device is used, the bottle mouth of the liquid storage bottle is closed, a stop valve between the titration liquid control device and the liquid storage bottle is opened, the stop valve between the titration liquid control device and the titration tube body is closed, the titration liquid control device is opened to pressurize the interior of the liquid storage bottle, and the titration liquid enters the titration tube body through a one-way check valve under the action of pressure; when the titration liquid is higher than the highest point of the scale mark of the tube body and lower than the tip of the U-shaped titration tube, the stop valve between the titration liquid control device and the liquid storage bottle is closed, and the titration liquid cannot drip out under the action principle of the communicating vessel; and opening a stop valve between the titration liquid control device and the burette body, operating the titration liquid control device to pressurize the interior of the burette body, closing the one-way check valve, beginning to drip out the liquid in the pipe at the tip of the U-shaped burette under the action of pressure, and finally carrying out titration operation through the titration liquid control device.

Technical Field

The invention relates to the field of chemical analysis devices, in particular to a drip-proof burette, a system and a using method thereof.

Background

The burette that commonly uses among the daily chemical analysis in laboratory all uses the control unit of piston knob formula, control titration and the velocity of flow of titrating liquid, and this kind of piston knob needs to cooperate with the burette, is polytetrafluoroethylene or glass material generally, and the cooperation is not good or live time is of a specified duration, because the material is ageing or the cooperation department is sealed not good, easily appears leaking the phenomenon, influences among the chemical analysis accuracy and the convenience of titration operation.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a drip-leakage-prevention titration system and a use method thereof.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a leak protection buret, buret body including vertical setting, its upper portion is the buret body of titrating liquid injection end, the lower part is the buret body, the cross-sectional area of titrating liquid injection end is greater than the buret body, two trompils are seted up at titrating liquid injection end top, wherein first trompil is connected with the switch, by the switching of the first trompil of on-off control, first connecting pipe has been inserted to the second trompil, it communicates with the buret body through first connecting pipe to titrate liquid controlling means, buret body bottom and U type buret intercommunication, U type buret is most advanced down, have the scale mark on the buret body.

The switch is a silica gel cover.

The U-shaped burette is a capillary glass burette.

The height of the tip of the U-shaped burette is higher than the highest point of the scale mark.

The first connecting pipe is a silicone tube.

There is also provided a method of use using a drip resistant burette as described above, comprising the steps of:

the burette comprises a burette body, a titration liquid control device, a connecting pipe, a titration liquid control device and a U-shaped burette body, wherein the titration liquid control device is connected with the burette body through the connecting pipe, the titration liquid is added into the burette body until the titration liquid is higher than the highest point of a scale mark and lower than the tip of the U-shaped burette, the titration liquid can not be dripped out under the action principle of a communicating vessel, a switch is closed, the titration liquid control device pressurizes the inside of the burette body, the titration liquid begins to be dripped out at the tip of the U-shaped pipe under the action of pressure, and finally, the titration operation is carried out through the titration liquid control device.

The bottom of the titration liquid control device is communicated with the liquid storage bottle through a second connecting pipe, wherein the pipe orifice of the second connecting pipe is arranged at the bottle orifice of the liquid storage bottle, one end of a third connecting pipe is inserted into the first open hole, the other end of the third connecting pipe is inserted into the liquid storage bottle, and the pipe orifice of the third connecting pipe is arranged at the bottom of the liquid storage bottle; the switch is arranged in the burette body.

And stop valves are arranged on the first connecting pipe and the second connecting pipe.

The switch is a one-way check valve.

There is also provided a method of use utilizing a leak resistant burette system as described above, comprising the steps of:

when the titration liquid control device is used, the bottle mouth of the liquid storage bottle is closed, a stop valve between the titration liquid control device and the liquid storage bottle is opened, the stop valve between the titration liquid control device and the titration tube body is closed, the titration liquid control device is opened to pressurize the interior of the liquid storage bottle, and the titration liquid enters the titration tube body through a one-way check valve under the action of pressure; when the titration liquid is higher than the highest point of the scale mark of the tube body and lower than the tip of the U-shaped titration tube, the stop valve between the titration liquid control device and the liquid storage bottle is closed, and the titration liquid cannot drip out under the action principle of the communicating vessel; and opening a stop valve between the titration liquid control device and the burette body, operating the titration liquid control device to pressurize the interior of the burette body, closing the one-way check valve, beginning to drip out the liquid in the pipe at the tip of the U-shaped burette under the action of pressure, and finally carrying out titration operation through the titration liquid control device.

Compared with the prior art, the invention has the beneficial effects that:

1. the U-shaped capillary glass burette replaces a piston knob, and the titration operation is carried out by utilizing the principle of a communicating vessel, so that the problem of leakage of the drops is fundamentally avoided.

2. Under the control of the titration liquid control device, the gas circuit and the liquid circuit are controlled to be separated, and meanwhile, the titration liquid control device is used for replacing titration liquid gravity type titration, so that the titration speed can be better controlled, and a better experiment effect is realized.

3. Because a piston knob is cancelled, the titration liquid only contacts the glass burette body and the silica gel pipeline in the operation, the acid-base titration liquid of the burette is universal, and the burette is more convenient to clean.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

in the figure, 1, a burette body, 2, scale marks, 3, a titration liquid control device, 4, a U-shaped capillary glass burette, 5, a switch, 6, a silicone tube, 7, a stop valve, 8 and a liquid storage bottle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The first embodiment:

as shown in FIG. 1, the anti-drip-leakage burette comprises a burette body 1, a U-shaped capillary glass burette 4, a titration liquid control device 3 and a silica gel cover.

The burette is provided with a U-shaped capillary glass burette 4, wherein the height of the tip of the capillary glass burette is higher than the scale mark of the pipe body.

And a silica gel cover is arranged at the upper opening of the burette.

The burette is provided with a titration liquid control device 3.

The burette body is provided with scale marks 2, and the upper part wide diameter part is provided with a silicone tube 6 connected with the titration liquid control device.

The use method of the anti-leakage burette is based on the anti-leakage burette and aims at controlling titration under the condition of no leakage of the dripping, and specifically comprises the following steps:

will titrate liquid controlling means 3 and be connected with the buret through silicone tube 6, will titrate liquid and add buret body 1, until titrating liquid is higher than scale mark 2 and be less than U type capillary glass buret 4 most advanced, under the effect principle of linker, titrate liquid can not drip, cover a mouthful silica gel lid, titrate liquid controlling means 3 to the inside pressurization of body, liquid begins to drip at U type capillary glass pipe most advanced under the effect of pressure, then titrate the operation under titrate liquid controlling means's effect.

Second embodiment:

as shown in FIG. 2, the anti-drip titration system comprises a burette body 1, a U-shaped capillary glass burette 4, a titration liquid control device 3 and a liquid storage bottle 8.

And silicone tubes 6 which are mutually communicated are arranged among the burette body 1, the titration liquid control device 3 and the liquid storage bottle 8.

And a stop valve 7 is arranged on the silica gel pipeline.

The burette body is equipped with U type capillary glass burette 4, and the burette body is equipped with scale mark 2, and wherein 4 pointed ends of capillary burette are highly higher than pipe shaft scale mark 2, and the burette upper shed is equipped with one-way check valve.

The use method of the anti-drip titration system is based on the anti-drip titration system, and the purpose of controlling titration under the condition of no drip leakage is achieved, and the anti-drip titration system specifically comprises the following steps:

with titration liquid controlling means 3, buret body 1, and stock solution bottle 8 pass through 6 interconnect of silicone tube, during the use, 8 bottleneck in stock solution bottle seal, open the stop valve 7 between titration liquid controlling means 3 and the stock solution bottle 8, close the stop valve 7 between titration liquid controlling means 3 and the buret body 1, open titration liquid controlling means 3, make it pressurize in the stock solution bottle 8, liquid is under the pressure effect, through one-way check valve, enter into in the buret body 1. When the titration liquid is higher than the scale mark of the tube body and lower than the tip of the U-shaped capillary glass burette 4, the stop valve 7 between the titration liquid control device 3 and the liquid storage bottle 8 is closed, and the titration liquid can not be dripped out under the action principle of the communicating vessel. The stop valve 7 between the titration liquid control device 3 and the burette body 1 is opened, the titration liquid control device 3 is operated to pressurize the interior of the burette body 1, the one-way check valve at the upper opening of the burette body is closed at the moment, liquid in the burette begins to drip out from the tip of the U-shaped capillary glass burette 4 under the action of pressure, and then the titration operation is carried out under the action of the titration liquid control device 3.

It should be noted that, according to the implementation requirement, each step/component described in the present application can be divided into more steps/components, and two or more steps/components or partial operations of the steps/components can be combined into new steps/components to achieve the purpose of the present invention.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.