CN204287105U - A kind of karl Fischer moisture teller adds pumping equipment automatically - Google Patents

Abstract

The utility model discloses an automatic liquid adding and discharging device for a Karl Fischer moisture meter, which mainly relates to the process of adding liquid and draining liquid for a Karl Fischer test liquid, including a reaction pool, a waste liquid bottle and a reagent bottle; The outlet of the liquid is connected with the gas pump for liquid filling, and the outlet of the liquid is connected with the liquid inlet hole of the reaction tank to form a sealed liquid feeding circuit; the exhaust port of the waste liquid bottle is connected with the air pump for liquid discharge, and the inlet of the liquid is connected with the liquid discharge hole of the reaction tank Tightly connected to form a sealed drain circuit. The utility model realizes accurate automatic liquid addition and discharge. The liquid level of the reagent can be controlled in real time by using two pipelines, so that the instrument can be adjusted in time when the instrument is unstable due to the different liquid level, so that the instrument can quickly reach a stable state. Make the staff not directly contact with the reagent, reduce the pungent smell, improve the working environment of the staff, and improve work efficiency.

Description

An automatic liquid adding and discharging device for a Karl Fischer moisture analyzer

technical field

The utility model belongs to the field of micromoisture testing by the Coulomb method, and relates to a liquid adding and discharging device, in particular to an automatic adding and discharging device for a Karl Fischer moisture meter.

Background technique

At this stage, the coulometric trace moisture analyzer is one of the important items for measuring the trace moisture of oil equipment such as transformers, but the traditional coulometric trace moisture analyzer still faces many difficulties when using and measuring light oil samples . Among them, when doing the test of micro-water in oil, it is necessary to manually add liquid and discharge liquid regularly and contact with various toxic chemicals. The liquid discharge device realizes the function of automatic liquid addition and discharge of the coulometric trace moisture meter, and also greatly improves the work efficiency.

The traditional coulometric moisture meter adopts the artificial liquid addition and discharge function, which makes the test personnel have too much contact with Karl Fischer reagent. As we all know, the coulometric method of trace moisture determination is the most professional and accurate method for determining trace moisture. The basic principle is that when using iodine to oxidize sulfur dioxide, a certain amount of water is required to participate in the reaction:

I ₂ +S0 ₂ +2H ₂ O＝2HI+H ₂ SO ₄ (1)

In order to make the reaction move in the positive direction and proceed quantitatively, an alkaline substance must be added. Experiments have shown that pyridine is the most suitable reagent, and pyridine can also combine with iodine and sulfur dioxide to reduce their vapor pressure. Therefore, the reagent must be added to methanol or another solvent containing active OH groups to convert pyridine sulfate anhydride into stable pyridine methyl hydrogensulfate. In this way, the medicinal solution used in the test process needs to contain substances such as iodine, sulfur dioxide, pyridine and methanol. These substances are harmful to the human body, especially pyridine, which is more harmful to the human body, which also makes some operators reluctant to use the equipment. Since the reaction pool is sealed during the use of the equipment, the test personnel can only add liquid and easy access to Karl Fischer reagent during oil drainage.

Utility model content

The purpose of this utility model is to solve the above problems, and to provide an automatic liquid adding and draining device for a Karl Fischer moisture analyzer. The last part is the pipeline part and the interface, which can prevent the staff from directly contacting the reagents, reduce the pungent smell, improve the working environment of the staff, and improve work efficiency.

In order to achieve the above object, the technical solution adopted in the utility model is:

An automatic liquid filling and discharging device for a Karl Fischer moisture analyzer, including a reaction tank, a waste liquid bottle, and a reagent bottle; the air inlet of the reagent bottle is sealed and connected with the liquid feeding pump, and the liquid outlet is sealed and connected with the liquid inlet hole of the reaction tank, forming a Sealed liquid feeding circuit; the exhaust port of the waste liquid bottle is sealed and connected with the liquid discharge pump, and the liquid inlet is sealed and connected with the liquid discharge hole of the reaction tank to form a sealed liquid discharge circuit.

The exhaust hole of the liquid-filling air pump is connected to the reagent interface, the reagent interface is connected to the air inlet on the working cover of the reagent bottle through the first flexible tube, and the liquid outlet on the working cover of the reagent bottle is connected to the On the liquid inlet hole; the inlet end of the liquid discharge air pump is connected to the waste liquid interface, and the waste liquid interface is connected to the exhaust port on the working cover of the waste liquid bottle through the second hose, and the liquid inlet on the working cover of the waste liquid bottle passes through the second hose. Four hoses are connected to the drain hole.

The liquid outlet at the end of the third hose extending into the reaction pool is located at the bottom of the reaction pool.

The liquid inlet at the end of the fourth hose extending into the reaction pool is located at the bottom of the reaction pool.

The reagent interface and the waste liquid interface adopt quick plugs.

The first hose and the second hose are fluororubber tubes.

The third hose and the fourth hose are polytetrafluoroethylene tubes or fluorine rubber tubes.

The diameter of the third hose and the fourth hose is 4mm.

Compared with the prior art, the utility model has the following beneficial effects:

According to the defects existing in the operation process of the existing equipment, the utility model adds a liquid discharge device, upgrades the liquid exchange system, and redesigns the fluid pipeline. Using a minimum of pipelines, filling, draining and cleaning can be done at any time. Accurate automatic liquid addition and discharge are realized. The liquid level of the reagent can be controlled in real time by using two pipelines, so that the instrument can be adjusted in time when the instrument is unstable due to the different liquid level, so that the instrument can quickly reach a stable state. Make the staff not directly contact with the reagent, reduce the pungent smell, improve the working environment of the staff, and improve work efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the connection relationship of the present invention.

In the figure: 1 is the liquid-filling air pump; 2 is the exhaust hole of the liquid-filling air pump; 3 is the air inlet of the pressurized air pump; 4 is the liquid-discharging air pump; 5 is the waste liquid interface; 6 is the reagent interface; 7 is the hose; 8 Flexible pipe; 9 is a waste liquid bottle; 10 is a reagent bottle; 11 is a liquid inlet hole; 12 is a liquid discharge hole; 13 is a flexible pipe; 14 is a flexible pipe.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to FIG. 1 , the utility model includes a liquid-filling air pump 1 and a liquid-discharging air pump 4 . The liquid feeding system and the liquid draining system are introduced respectively below.

The working process of the liquid addition system is as follows: the exhaust port 2 of the liquid addition air pump 1 is connected to the reagent interface 6 on the equipment through a hose. The interface 6 is connected with the working cover of the reagent bottle 10 with a hose 7 to form a sealed air circuit system. During operation, by applying voltage to the liquid-filling air pump 1, air enters through the air inlet 3 on the liquid-filling air pump 1, and then makes the liquid-filling The air pump 1 generates air pressure, which is pressurized to the reagent bottle 10 through the above air circuit, so that the reagent in the reagent bottle enters the reaction pool through the hose 13 and the liquid inlet 11 under the action of air pressure for working use.

The working process of the liquid drainage system is as follows: the air inlet port of the liquid drainage pump 4 is connected to the waste liquid interface 5 on the equipment through a hose, and the waste liquid interface also adopts a quick plug, and the waste liquid interface 5 is connected to the waste liquid bottle through the hose 8 9. The working cover is connected to form a sealed air circuit system. During operation, the liquid discharge air pump 4 is operated by applying voltage to the liquid discharge air pump 4. The air intake port of the liquid discharge air pump will draw air from the waste liquid bottle 9 through the hose. , so that a negative pressure is generated in the waste liquid bottle, and the waste liquid in the reaction tank flows back into the waste liquid bottle through the drain hole 12 and the hose 14 under the action of the negative pressure. Realize automatic draining function.

Principle of the utility model:

Because Karl Fischer reagent has corrosive effect, it has been proved through many tests based on this characteristic that polytetrafluoroethylene tubes and fluorine rubber tubes with relatively stable chemical properties are used as the working pipelines. The third hose 13 and the fourth hose 14 must have For the liquid to pass through, choose a polytetrafluoroethylene tube with a diameter of 4mm as the working pipeline, while the other pipelines are gas circuits, and choose a fluororubber tube with good toughness.

The third hose 13 in the reagent bottle 10 will be inserted into the bottom of the bottle during work, so that the reagent in the reagent bottle 10 can be completely added to the reaction pool as much as possible when adding liquid, reducing waste. The four flexible pipes 14 will be inserted into the bottom of the reaction tank as far as possible, so as to ensure that the drainage is complete.

In order to prevent cross-contamination of pipelines, the utility model sets up independent liquid-feeding and liquid-discharging pipeline systems to work separately from liquid-feeding pipelines and liquid-discharging pipelines. The utility model has the advantage that the operator does not directly contact the reagent and the waste liquid, and avoids the damage of the liquid to the human body. Moreover, the system pipeline connection is relatively simple and easy to operate, which greatly improves the work efficiency of the operator.

The above content is only to illustrate the technical idea of the utility model, and cannot limit the protection scope of the utility model. Any changes made on the basis of the technical solution according to the technical idea proposed by the utility model all fall into the scope of the utility model. within the scope of protection of the claims.

Claims (8)

1. karl Fischer moisture teller adds a pumping equipment automatically, it is characterized in that: comprise reaction tank (15), waste liquid bottle (9) and reagent bottle (10); Reagent bottle (10) air intake opening seals with liquid feeding air pump (1) and is connected, and liquid outlet seals with the inlet opening (11) of reaction tank (15) and is connected, and forms the liquid feeding loop of sealing; The exhausr port of waste liquid bottle (9) seals with discharge opeing air pump (4) and is connected, and the outage (12) of liquid inlet and reaction tank (15) is tightly connected, and forms the weep circuit of sealing.

2. karl Fischer moisture teller according to claim 1 adds pumping equipment automatically, it is characterized in that: the vent port of described liquid feeding air pump (1) and being connected of reagent interface (6), reagent interface (6) is connected to reagent bottle (10) by the first flexible pipe (7) and works on the air intake opening that covers, reagent bottle (10) work the liquid outlet that covers by the 3rd flexible pipe (13) be connected on inlet opening (11); The inlet end of discharge opeing air pump (4) is connected with waste liquid interface (5), waste liquid interface (5) is connected to waste liquid bottle (9) by the second flexible pipe (8) and works on the exhausr port that covers, and waste liquid bottle (9) liquid inlet covered that works is connected on outage (12) by the 4th flexible pipe (14).

3. karl Fischer moisture teller according to claim 2 adds pumping equipment automatically, it is characterized in that: the end liquid outlet that described 3rd flexible pipe (13) stretches into reaction tank (15) is positioned at the bottom of reaction tank (15).

4. karl Fischer moisture teller according to claim 2 adds pumping equipment automatically, it is characterized in that: the end inlet that described 4th flexible pipe (14) stretches into reaction tank (15) is positioned at the bottom of reaction tank (15).

5. karl Fischer moisture teller according to claim 2 adds pumping equipment automatically, it is characterized in that: described reagent interface (6) and waste liquid interface (5) adopt quick plug.

6. karl Fischer moisture teller according to claim 2 adds pumping equipment automatically, it is characterized in that: described the first flexible pipe (7) and the second flexible pipe (8) adopt fluorine rubber-pipe.

7. the karl Fischer moisture teller according to Claims 2 or 3 or 4 adds pumping equipment automatically, it is characterized in that: the 3rd described flexible pipe (13) and the 4th flexible pipe (14) adopt polyfluortetraethylene pipe or fluorine rubber-pipe.

8. the karl Fischer moisture teller according to Claims 2 or 3 or 4 adds pumping equipment automatically, it is characterized in that: the 3rd described flexible pipe (13) and the diameter of the 4th flexible pipe (14) are 4mm.