CN211927691U

CN211927691U - Online refractometer

Info

Publication number: CN211927691U
Application number: CN202020371479.0U
Authority: CN
Inventors: 朱康辉; 沈杰; 陈思云
Original assignee: Hangzhou Luopanxing Technology Co ltd
Current assignee: Hangzhou Luopanxing Technology Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-11-13
Anticipated expiration: 2030-03-23

Abstract

The utility model provides an online refractometer, includes light path core module, casing, control scheme board and refractometer screen, light path core module is including lieing in same light path LED light source, first collimating lens, second collimating lens, trapezoidal prism, third collimating lens and CCD photosensitive element in proper order, LED light source, first collimating lens, second collimating lens, trapezoidal prism, third collimating lens and CCD photosensitive element fix inside the casing, trapezoidal prism's outer terminal surface is the working face of refractometer, CCD photosensitive element with the control scheme board is connected, the control scheme board is fixed inside the casing, the uncovered department seal installation lid of casing, be equipped with the refractometer screen on the lid, the control scheme board with the refractometer screen is connected. The utility model provides a realize continuous, real-time, high-efficient measurement, can solve the error of naked eye reading and realized the real-time on-line measuring in certain refracting index within range.

Description

Online refractometer

Technical Field

The utility model belongs to the technical field of detect liquid concentration, refracting index equipment, concretely relates to refractometer.

Background

The refractive index is one of important physical constants of a substance, the concentration of a solution is often in close relation with the refractive index, all pure solutions have a specific refractive index, if impurities exist in the solution, the refractive index is also deviated, and the higher the content of the impurities is, the larger the deviation is. Therefore, by measuring the refractive index, the concentration of the solution can be detected. Refractometer is generally applied to beverage factories, sugar factories, oil extraction, pharmaceutical factories, paint factories and other occasions.

The prior handheld refractometer is widely used in the market, the reading is carried out through the ocular lens, the reading through the ocular lens has errors, and only the sampling measurement can be carried out on a measurement object, so the efficiency is low; most of the refractometers used in laboratories are digital display type refractometers, which are limited by sampling measurement like the refractometers with naked eye reading, and cannot be applied to continuous, real-time and efficient measurement in industrial fields.

Disclosure of Invention

In order to overcome the not enough of prior art, the utility model provides a realize continuous, real-time, high-efficient measuring online refractometer, through the utility model discloses, can solve the error of naked eye reading and realize the real-time on-line measurement in certain refracting index within range.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides an online refractometer, includes light path core module, casing, control scheme board and refractometer screen, light path core module is including lieing in same light path LED light source, first collimating lens, second collimating lens, trapezoidal prism, third collimating lens and CCD photosensitive element in proper order, LED light source, first collimating lens, second collimating lens, trapezoidal prism, third collimating lens and CCD photosensitive element fix inside the casing, trapezoidal prism's outer terminal surface is the working face of refractometer, CCD photosensitive element with the control scheme board is connected, the control scheme board is fixed inside the casing, the uncovered department seal installation lid of casing, be equipped with the refractometer screen on the lid, the control scheme board with the refractometer screen is connected.

Further, the refractometer further comprises a temperature sensor, the temperature sensor is fixed inside the shell, and the temperature sensor is connected with the control circuit board.

Preferably, the LED light source, the first collimating lens, the second collimating lens, the trapezoidal prism, the third collimating lens and the CCD photosensitive element are fixed in the groove to form a whole.

Still further, the control circuit board is connected with the glan head, and the glan head is located the outer wall of casing.

Preferably, the outer wall of the middle part of the shell is provided with a heat dissipation fin.

The cover is connected with the refractometer shell through screws, and the cover is sealed by using fluororubber.

The casing includes casing and lower casing, go up between casing and the lower casing through screwed connection and each other with fluororubber with it sealed, the internal installation space that supplies light path core module suit that is equipped with of lower casing.

The beneficial effects of the utility model are that: the influence of reading errors caused by sampling visual observation in the prior art is overcome, real-time online monitoring within a certain refractive index range is realized, and real-time online monitoring under various moist, high-temperature and high-corrosivity scenes is realized by using the fluororubber and the splash-proof screen.

Drawings

Fig. 1 is an oblique view of the optical path core module of the refractometer of the present invention.

Fig. 2 is an oblique view of the housing of the refractometer of the present invention.

Fig. 3 is an internal front sectional view of the refractometer of the present invention.

Fig. 4 is a schematic view of the installation of the temperature sensor.

In the figure: 1. a light path core module; 2. a collimating lens; 3. a CCD light sensing element; 4. a control circuit board; 5. a fluororubber; 6. an LED light source; 7. a fluororubber; 8. a heat dissipating fin; 9. a glan head.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1-4, an online refractometer comprises a light path core module 1, a shell, a control circuit board 4 and a refractometer screen, wherein the light path core module comprises an LED light source 6, a first collimating lens, a second collimating lens, a trapezoidal prism, a third collimating lens and a CCD photosensitive element 3 which are sequentially located on the same light path, the LED light source, the first collimating lens, the second collimating lens, the trapezoidal prism, the third collimating lens and the CCD photosensitive element are fixed inside the shell, the outer end face of the trapezoidal prism is a working face of the refractometer, the CCD photosensitive element 3 is connected with the control circuit board 4, the control circuit board 4 is fixed inside the shell, a cover 10 is hermetically mounted at an opening of the shell, the refractometer screen is arranged on the cover 10, and the control circuit board 4 is connected with the refractometer screen.

Further, the refractometer further comprises a temperature sensor 11, the temperature sensor 11 is fixed inside the shell, and the temperature sensor 11 is connected with the control circuit board 4.

Still further, the control circuit board 4 is connected with a glan head 9, and the glan head 9 is located on the outer wall of the casing.

Preferably, the outer wall of the middle part of the shell is provided with a heat dissipation fin 8.

The cover 10 is connected to the housing by screws, and sealed with the fluororubber 5 therebetween.

In this embodiment, before the assembly, the optical path core module is assembled, including placing the collimating lens 2 and the LED light source 6 into the set groove and fixing them with ultraviolet glue, and then assembling the optical path core module with a countersunk bolt. Further fix CCD photosensitive element 3 on the base of light path core module through the nut, LED light source 6, first collimating lens, second collimating lens, trapezoidal prism, third collimating lens and CCD photosensitive element 3 are located same light path in proper order. The proper distance is found by adjusting the distance between the CCD photosensitive element and the trapezoid prism.

And placing the debugged optical path core module into a shell of the refractometer, and connecting the optical path core module with the shell through a countersunk head screw to achieve the purpose of fixing. The shell is made of stainless steel 316 so as to meet the requirements of corrosion resistance and high temperature resistance.

The temperature sensor 11 (pt 100 is adopted) is placed in the groove of the shell, and the signal wire of the temperature sensor is connected to the control circuit board, so that real-time temperature transmission is realized, and the influence of temperature on concentration is further compensated.

The control circuit board 4 is fixed in the refractometer shell through screws. The signal line is led to the outside through the Glan head on the shell to realize debugging of the control circuit, and meanwhile, monitored data can be transmitted to a remote PC end in real time to realize on-line monitoring of the refractometer.

Further, the control circuit board 4 is fixed on the corresponding thread of the core module through a plastic isolation column.

The fluororubber 7 is put into the groove of the housing, and the cover 10 is pressed tightly by the countersunk head bolt to be sealed.

The screen of the refractometer is mounted on the cover by screws and connected to a signal line to a control circuit. The real-time display of the information such as temperature, concentration and the like is realized.

Claims

1. The utility model provides an online refractometer, its characterized in that, includes light path core module, casing, control scheme board and refractometer screen, light path core module is including lieing in same light path LED light source, first collimating lens, second collimating lens, trapezoidal prism, third collimating lens and CCD photosensitive element in proper order, LED light source, first collimating lens, second collimating lens, trapezoidal prism, third collimating lens and CCD photosensitive element are fixed inside the casing, trapezoidal prism's outer terminal surface is the working face of refractometer, CCD photosensitive element with the control scheme board is connected, the control scheme board is fixed inside the casing, casing opening department seal installation lid, be equipped with the refractometer screen on the lid, the control scheme board with the refractometer screen is connected.

2. The on-line refractometer as claimed in claim 1, wherein said refractometer further comprises a temperature sensor fixed inside the housing, said temperature sensor being connected to said control circuit board.

3. An in-line refractometer as claimed in claim 1 or 2, wherein the LED light source, the first collimating lens, the second collimating lens, the trapezoidal prism, the third collimating lens and the CCD photosensitive element are fixed in the groove to form a whole.

4. An in-line refractometer as claimed in claim 1 or 2, wherein said control circuit board is connected to a glan head, said glan head being located on the outer wall of the housing.

5. An in-line refractometer as claimed in claim 1 or 2, wherein the outer wall of the middle part of the housing is provided with heat dissipating fins.

6. An in-line refractometer as claimed in claim 1 or 2, wherein said cover is screwed to the refractometer housing, and sealed with viton.

7. An on-line refractometer as claimed in claim 1 or 2, wherein said casing comprises an upper casing and a lower casing, said upper casing and said lower casing are connected by screws and sealed with fluororubber, said lower casing has a mounting space for the optical path core module to be mounted therein.