CN212180026U

CN212180026U - Constant volume device of automatic chemical reagent preparation system

Info

Publication number: CN212180026U
Application number: CN202020436808.5U
Authority: CN
Inventors: 陈春义; 陈春梅
Original assignee: Qinzhou Mingda Testing Technology Co ltd
Current assignee: Qinzhou Mingda Testing Technology Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-18
Anticipated expiration: 2030-03-31

Abstract

The invention discloses a constant volume device of an automatic chemical reagent preparation system, which comprises: the device uses the photoelectric sensor to sense the position of the liquid level, sends out an arrival instruction once when the liquid level in the volumetric flask reaches the scale mark, waits for the liquid level to be static, detects whether the liquid level is on the scale mark, and circulates until the lowest part of the liquid level is level with the scale mark. The photoelectric sensor can be kept horizontal all the time, and errors caused by visual angle problems during manual constant volume are reduced.

Description

Constant volume device of automatic chemical reagent preparation system

The technical field is as follows:

the invention belongs to chemical reagent preparation equipment, and designs an automatic constant volume device for preparing a chemical reagent.

Background art:

different reagent densities, the mixed reagent is not accurate by simply adopting volume calculation, and the constant volume is used for preparing the accurate reagent. The constant volume work takes the time of the experimenter, and the manual constant volume reagent can generate errors due to the operation.

Disclosure of Invention

Based on the prior art, the invention provides a constant volume device suitable for an automatic liquid preparation system, and aims to provide a device capable of replacing manual constant volume to realize automatic constant volume.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

the utility model provides a constant volume device of automatic system of preparing of chemical reagent which characterized in that transfer line can remove about along the polished rod, also can reciprocate through polished rod locating clip, adapts to the different requirements in different volumetric flask bottleneck position. Photoelectric sensor can reciprocate along the screw rod, adapts to the different requirements of different volumetric flask scale mark positions, and whether photoelectric sensor detects the liquid level in the volumetric flask and reachs the scale mark that detects, and photoelectric sensor has signal output port.

Based on the fact that corrosive solutions such as strong acid, strong alkali and the like exist in chemical reagents, the infusion tube in the device is a fluorine rubber tube with strong acid resistance, strong alkali resistance, high temperature resistance and shading characteristics.

Based on the volatile gas commonly used in the chemical reagent, the photoelectric sensor in the device is sealed and waterproof.

The photoelectric sensor is a groove-shaped sensor, and light emitting diodes and photosensitive diodes are respectively arranged on two sides of the notch. When no reagent is available, the light-sensitive diode receives the light of the light-emitting diode and outputs high level. When reagent exists, light is refracted through the reagent, the light sensing diode loses the light of the light emitting diode, and low level is output.

Can cause the liquid level vibration when adding reagent to the volumetric flask, photoelectric sensor real-time supervision liquid level when the suspension adds reagent back liquid level signal to the volumetric flask and still be high to when the hold time is greater than 2 seconds, just confirm for accomplishing the constant volume.

Drawings

The invention is described in further detail below with reference to the figures and specific examples.

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention: polished rod seat (1), polished rod (2), polished rod locating clip (3), transfer line (4), first spherical bearing (5), screw rod (6), nut seat (7), photoelectric sensor (8), second spherical bearing (9), volumetric flask (10).

Fig. 2 is a partially enlarged view of a front view of the volume completion: a liquid level concave part (11), volumetric flask scale marks (12), a photoelectric sensor detection position (13)

FIG. 3 is a timing diagram of signals according to an embodiment of the present invention: s1 photoelectric sensor output signal, S2: reagent addition control signal, S3: the liquid surface state.

Detailed Description

The bottleneck of the volumetric flask (10) is attached to the notch of the photoelectric sensor (8), and the ray of the emitting end of the photoelectric sensor (8) penetrates through the bottleneck of the volumetric flask to reach the receiving end. In the embodiment, the notch of the photoelectric sensor (8) is 20mm, the response time is 15us, the wavelength is 940mm, and the detection distance is 20 mm. And the interference of other light rays is reduced to a certain extent.

The vertical moving component comprises a first spherical bearing (5), a second spherical bearing (9), a screw (6), a nut seat (7) and a photoelectric sensor (8). The rotating screw rod (6) drives the photoelectric sensor (8) to move up and down to the scale marks (12) of the volumetric flask.

A polished rod seat (1), a polished rod (2) and a polished rod positioning clamp (3) form a transfusion tube moving assembly. Two handle screws are arranged on the polish rod positioning clamp (3), and the infusion tube is fixed by screwing the handle screws. Volumetric flasks with various volumes are used based on the requirement of chemical experiments, the volumes of the volumetric flasks are different, the volumes are also different, and the positions of infusion tubes are flexibly adjusted according to different volumetric flasks.

To explain further, the neck of the measuring flask (10) is located against the notch of the photoelectric sensor (8) and does not completely enter the notch. The reagent is added from the center of the bottle mouth, and the detection of the photoelectric sensor (8) is not interfered.

Referring to fig. 3, the liquid level vibrates when reagent is added, and when the liquid level approaches the scale mark, the vibrating liquid level makes the output signal S1 of the photoelectric sensor (8) jump to high level, and the reagent adding control signal S2 is pulled low to stop adding reagent. After waiting for 2 seconds, if the liquid level does not reach the scale mark, the output signal S1 of the photoelectric sensor (8) returns to the low level, the reagent adding control signal S2 is pulled high to slowly add the reagent until the output signal S1 changes to the high level again, the reagent adding control signal S2 is pulled low to stop adding the reagent, and the liquid level is waited for 2 seconds again to be static. The above-mentioned process is repeated until the output signal S1 is still at the high level after the liquid level is stopped, and it is considered that the constant volume is completed.

Although the present invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A constant volume device of a chemical reagent automatic preparation system is characterized by comprising a polished rod seat (1), a polished rod (2), a polished rod positioning clamp (3), a liquid conveying pipe (4), a first spherical bearing (5), a screw rod (6), a nut seat (7), a photoelectric sensor (8), a second spherical bearing (9) and a volumetric flask (10); the transfer line can remove about along the polished rod, photoelectric sensor can reciprocate along the screw rod, photoelectric sensor detects the scale mark whether the liquid level in the volumetric flask reachs the volumetric flask, photoelectric sensor has signal output port, polished rod location accompanies two handle screws, screw up on the polished rod one, another screws up the transfer line, the screw rod uses first spherical bearing (5), second spherical bearing (9) is fixed, the nut seat is installed on the screw rod, the nut seat reciprocates along the screw rod, photoelectric sensor installs on the nut seat, the nut seat drives photoelectric sensor and reciprocates.

2. A constant volume device of an automatic chemical reagent preparing system according to claim 1, wherein the polish rod (2) is fixed by the side of the polish rod base (1).

3. A volumetric apparatus for automatic chemical reagent dispensing system according to claim 1, characterized in that the photoelectric sensor (8) is a groove sensor.

4. The constant volume device of the automatic chemical reagent preparation system according to claim 1, wherein the photoelectric sensor (8) adopts 3.3-5 v direct current.