CN219996817U - Device for automatically measuring syrup brix on line - Google Patents

Abstract

The utility model discloses an on-line automatic syrup brix measuring device which comprises a feeding barrel, a first bracket, a working platform, a feeding pipe, a sampling valve, an overflow pipe, a communication pipeline pneumatic valve, an overflow barrel, a measuring barrel, a second bracket, a viscometer, a first hot water pipe, a second hot water pipe, a first hot water pneumatic cleaning valve, a second hot water pneumatic cleaning valve, a bottom discharge pipe, a bottom discharge pneumatic valve and a DCS automatic control system. The online syrup brix meter is widely applicable to the evaporation process of the clarification section of a cane sugar factory, and the opening of a syrup inlet and outlet valve and a steam valve of each effect evaporation tank is regulated and controlled by matching with a DCS control system, so that a new technical means is provided for quickly and efficiently improving the concentration of sugar liquid and saving energy consumption, and important guarantee is provided for ensuring sugar recovery, saving energy and reducing emission and increasing economic benefit.

Description

Device for automatically measuring syrup brix on line

Technical Field

The utility model mainly relates to the technical field of sugar production, in particular to an on-line automatic syrup brix measuring device.

Background

In sugar cane factories, the clarification vaporization process is a very important key control point. How to monitor the syrup concentrating efficiency and reduce the steam consumption of each evaporating pot is an urgent problem.

Most syrup concentration measurements in sugar cane factories are manually sampled at regular time and sent to laboratory to detect results and report to evaporation operators, who adjust the juice and steam usage. The syrup brix is unstable due to heavy work and delayed response, and the follow-up procedure is affected.

In order to measure the syrup concentration in real time, so as to adapt the syrup concentration in a certain range in time, the syrup concentration is normally monitored in the whole production process, and in order to ensure that a measuring element stably works in syrup in the syrup brix measuring process, the syrup fluid is prevented from impacting the measuring element to cause overlarge fluctuation of measured data, and the accuracy and the stability of sugar brix measurement are ensured.

The utility model discloses a syrup brix measuring device (patent number: ZL 202123271136.0) like chinese patent literature, including storage box, syrup data acquisition unit and syrup data processing unit, syrup data processing unit sets up in the storage box is outside, syrup data acquisition unit is used for detecting the syrup of storage box internal storage, syrup data acquisition unit with syrup data processing unit electric connection, syrup data acquisition unit includes pressure sensor, force transmission connecting piece and body the top of storage box is provided with the hanging hole, and force transmission connecting piece's upper end is connected with pressure sensor's collection end transmission, force transmission connecting piece's lower extreme along the hanging hole vertical downwardly stretch into in the storage box with the upside of body is connected, the lower side sliding suspension of body is connected on the bottom inner wall of storage box. The syrup concentration measuring device can measure syrup concentration in real time, can ensure the stability of the floating body in the measuring process, prevents the syrup from impacting the floating body to influence the measuring result, and ensures the measuring accuracy and stability.

For example, the Chinese patent literature (patent number: ZL 201822164749.6) discloses a syrup brix real-time measurement system, which comprises a buffer tank, a measuring barrel, a force transducer, a singlechip, a floating ball, a pulp inlet pipe and a pulp outlet pipe, wherein the bottom of the measuring barrel is provided with the pulp outlet pipe, the buffer tank is connected with the pulp outlet pipe through the pulp inlet pipe, the pulp outlet pipe is provided with a pulp outlet valve, the pulp inlet pipe is provided with a pulp inlet valve, the upper end of the measuring barrel is provided with an overflow pipe and a water flushing pipe, the measuring transducer is provided with a connecting rod, one end of the connecting rod is provided with the floating ball, the floating ball is suspended in the measuring barrel through the connecting rod, the measuring transducer is electrically connected with the singlechip, and the singlechip is electrically connected with a display. The measuring system can continuously measure the brix of the syrup, ensure the quality of the syrup, greatly reduce the labor reduction of workers and is suitable for popularization and application in factories.

For example, the Chinese patent application document "syrup brix on-line automatic control detection device (patent application number: 200420065068. X)" discloses a syrup brix on-line automatic detection device, which comprises a control box and a computer for controlling brix detection of a plurality of syrup evaporation tanks, wherein each evaporation tank is connected by an input/output pipeline, and is characterized by further comprising: the feeding pipe is communicated with the output pipe of the evaporation tank, comprises a bucket type weighing container, an overflow pipe and a discharge pipe of the bucket type weighing container and a constant volume weighing device of the weighing sensor, wherein the feeding pipe and the overflow pipe are communicated with each other at the upper end of the weighing container, and electromagnetic valves are arranged in the feeding pipe and the discharge pipe and controlled by a control box and a computer; and a constant volume weighing device is arranged on the output pipeline of each evaporation tank. The weight signal of syrup in the container is measured by a weighing sensor connected with the weighing container, and is transmitted to a control box and a computer, and the weight signal is subjected to signal amplification, A/D signal conversion and data analysis processing by the computer, so that the brix of the syrup is displayed on a display. The method is suitable for brix detection in sugar industry.

Disclosure of Invention

Aiming at the defects and shortcomings existing in the prior art, the utility model provides an on-line automatic syrup brix measuring device, so as to solve the problems that most syrup brix measurements in a cane sugar factory are manually sampled and then sent to a laboratory for testing, and an evaporation operator adjusts the flow rate of syrup entering a tank and the steam consumption according to the testing result, so that the work is heavy, the evaporation efficiency is low, the energy consumption is high and the like after the reaction is delayed.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

an online automatic measurement device for the degree of hammeriness of syrup comprises a feeding barrel, a first bracket, a working platform, a feeding pipe, a sampling valve, an overflow pipe, a communication pipeline, a communication pipe pneumatic valve, an overflow barrel, a measuring barrel, a second bracket, a viscometer, a first hot water pipe, a second hot water pipe, a first hot water pneumatic cleaning valve, a second hot water pneumatic cleaning valve, a bottom discharge pipe, a bottom discharge pneumatic valve and a DCS automatic control system;

the feeding barrel is fixed on the working platform through a first bracket; the feeding pipe is provided with a sampling valve; the feeding pipe stretches into the feeding barrel to lean against the bottom; the feeding barrel is connected with the overflow pipe; a first hot water pneumatic cleaning valve is arranged on the first hot water pipe; the feeding barrel is connected with the measuring barrel through a pipeline and a communicating pipe pneumatic valve, and the pipeline penetrates through the bottom of the overflow barrel to enter the bottom of the measuring barrel to be connected with the measuring barrel; the overflow barrel is fixed on the working platform through a third bracket; the measuring barrel is sleeved in the overflow barrel; the bottom of the measuring barrel is not communicated with the overflow barrel; the viscometer is fixed on the working platform through a second bracket; and a measuring signal of the viscometer is connected with the DCS automatic control system through a communication cable for the junction box.

Further, a discharge pipe is connected with the bottom of the overflow barrel and extends into the recovery tank.

Further, the overflow vat is higher than the measuring vat edge and lower than the feed vat.

Further, the overflow barrel and the measuring barrel are made of stainless steel pipes with different diameters and are nested together.

Further, the bottom of the measuring barrel is made into a cone shape, and a feeding hole is arranged at the bottom.

Further, the viscometer comprises a protection frame, a rotor, a connecting rod, a temperature probe, a connecting rod chuck, an adjustor, a junction box, a base, a horizontal adjusting screw and a touch screen.

Further, the rotor is made into a gear shape, and the number of teeth of the rotor can be increased or decreased.

Further, the rotor, the connecting rod and the temperature probes arranged in the connecting rod are all detachable, and corresponding measurement control parameters can be adjusted and inquired through the touch screen.

Further, one end of the first hot water pipe is provided with a nozzle and extends into the feeding barrel.

Further, a second hot water pneumatic cleaning valve is arranged on the second hot water pipe; one end of the second hot water pipe is provided with a nozzle and extends into the measuring barrel; the bottom discharge pipe is provided with a bottom discharge pneumatic valve; one end of the bottom discharge pipe is connected with the communicating pipe, and the other end of the bottom discharge pipe is led into the recovery tank.

Through this technical scheme, can realize following technical effect:

(1) The device for automatically measuring the syrup brix on line can solve the problems of low evaporation efficiency and large energy consumption caused by heavy work and delayed reaction due to the fact that most syrup brix measurement in a cane sugar factory is manually sampled and then sent to a laboratory for testing and an evaporation operator adjusts the flow rate of syrup entering a tank and the steam consumption according to a testing result.

(2) The device for automatically measuring the syrup brix on line is widely applied to the evaporation process of the clarification section of the cane sugar factory, and improves the syrup concentrating efficiency; the problem of large energy consumption is solved, and a new technical means is provided, so that important guarantees are provided for ensuring energy conservation and emission reduction, safe production and high-quality product output.

(3) The utility model innovates the technology, realizes on-line automatic measurement of the syrup brix, and ensures that the juice passing amount and the steam consumption efficiency of each evaporation tank are automatically adjusted in different time periods in the whole sugarcane squeezing period according to the different syrup solid solution content differences of the maturity of the sugarcane.

(4) The utility model can solve the uncertain factors caused by human. The full-automatic control system is utilized to innovate and accurately measure the change of the brix of syrup at the inlet and outlet of each evaporation tank, and the DCS automatic control system is utilized to automatically, scientifically and reasonably adjust the juice passing amount and the air consumption of each evaporation tank, and can provide scientific basis for evaluating the efficiency of each evaporation tank.

(5) Before the on-line automatic syrup brix measuring device is not used as an aid, the syrup concentration efficiency is about 71%; the syrup concentration efficiency is about 86% after the device for automatically measuring the syrup brix on line is used, and the evaporation efficiency of the evaporation tank is obviously improved.

Drawings

FIG. 1 is a schematic diagram of an on-line automatic syrup brix measuring device according to the present utility model;

FIG. 2 is a top view of the overflow vat and the measuring vat;

FIG. 3 is a front view of the viscometer;

FIG. 4 is a front view of a stainless steel rotor and connecting rod;

FIG. 5 is a top view of a stainless steel rotor;

FIG. 6 is a control flow chart of the on-line automatic syrup brix measuring device.

Detailed Description

The following description will clearly and fully describe the technical solutions in the technical embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the on-line automatic syrup brix measuring device comprises a feed tank 1, a first bracket 44, a working platform 45, a feed pipe 12, a sampling valve 11, an overflow pipe 13, a communication pipeline 14, a communication pipe pneumatic valve 25, an overflow tank 31, a measuring tank 32, a second bracket 41, a viscometer 5, a first hot water pipe 22, a second hot water pipe 23, a first hot water pneumatic cleaning valve 21, a second hot water pneumatic cleaning valve 24, a bottom discharge pipe 26, a bottom discharge pneumatic valve 27 and a DCS automatic control system.

The feed chute 1 is fixed on a working platform 45 by a first bracket 44; the feeding pipe 12 is provided with a sampling valve 11; the feeding pipe 12 extends into the feeding barrel 1 to the bottom; the feeding barrel 1 is connected with an overflow pipe 13; a first hot water pneumatic cleaning valve 21 is arranged on the first hot water pipe 22; one end of the first hot water pipe 22 is provided with a nozzle and extends into the feeding barrel 1; the feeding barrel 1 is connected with the measuring barrel 32 through a pipeline 14 and a communicating pipe pneumatic valve 25, and the pipeline 14 passes through the bottom of the overflow barrel 31 and enters the bottom of the measuring barrel 32 to be connected with the measuring barrel; the overflow bucket 31 is fixed on the working platform 45 through a third bracket 42; the measuring barrel 32 is sleeved in the overflow barrel 31; the bottom of the measuring barrel 32 is not communicated with the overflow barrel 31; the overflow vat 31 is higher than the edge of the measuring vat 32 and lower than the feed vat 1; the overflow barrel 31 and the measuring barrel 32 are made of stainless steel pipes with different diameters and are sleeved together; the bottom of the measuring barrel 32 is conical, and a feeding hole is arranged at the bottom; the discharge pipe 33 is connected with the bottom of the overflow barrel 31 and extends into the recovery tank 43; the viscometer 5 is fixed on a working platform 45 through a second bracket 41; the measuring signal of the viscometer 5 is connected with a DCS automatic control system through a junction box 56 by a communication cable. A second hot water pneumatic cleaning valve 24 is arranged on the second hot water pipe 23; one end of the second hot water pipe 23 is provided with a nozzle and extends into the measuring barrel 32; a bottom discharge pneumatic valve 27 is arranged on the bottom discharge pipe 26; the bottom discharge pipe 26 has one end connected to the communication pipe 14 and the other end introduced into the recovery tank 43. The DCS automatic control system is a key component of syrup concentration efficiency of the whole evaporation tank, and is the efficiency of the machine different from manual work; the method is a basis for judging whether each parameter in the syrup concentration process operates according to the technological index, design scheme and steps; the automatic measuring device is a command center for realizing automatic online measurement of the syrup brix and controlling the division cooperation and coordinated operation of all components.

1. The device for automatically measuring the syrup brix on line comprises the following components and functions

(1) The feed barrel 1 comprises a feed pipe 12 and a sampling valve 11 arranged on the feed pipe 12; a first hot water pneumatic purge valve 21 provided on the first hot water pipe 22 and the first hot water pipe 22; the upper edge of the feeding barrel 1 is provided with an overflow pipe 13; the bottom of the feed barrel 1 is provided with a communicating pipe 14.

Action of the feedwell:

in the evaporation process, the purity of the syrup concentrated by a plurality of stages of evaporation tanks in series is increased, the viscosity is continuously increased, the syrup is extremely easy to foam when disturbed, syrup impurities and foam are easily adhered to measuring equipment, and the measurement of a syrup viscometer is influenced by the doped bubbles in the syrup. The feedwell 1 is provided to primarily purge bubbles from the syrup. Leaving the syrup entering the metering barrel 32 free of bubbles. Therefore, the discharge end of the feeding pipe 12 is arranged to extend into the position close to the bottom of the feeding barrel 1, so that more foam is prevented from being generated due to the impact of the height difference.

Syrup enters the feedwell 1 through the feed tube 12 when the sampling valve 11 is opened. Because the syrup is easy to foam when the physical characteristic, i.e. the disturbance amplitude, is large, the syrup is introduced into the feeding barrel 1 near the bottom by the feeding pipe 12 so as to reduce the influence of the foam generated by the fall of the syrup on the accuracy of measuring the brix. When the syrup is full, it flows into the recovery tank through overflow pipe 13.

(2) The measuring part includes an overflow tub 31, a discharge pipe 33, a measuring tub 32, a communicating pipe 14, and a viscometer 5.

Measuring the effect of bucket, overflow bucket:

the purpose of the measuring barrel 32 is to ensure that the viscometer rotor is immersed in a clean and relatively level stable syrup, avoiding the effects of other uncertainties. The overflow barrel 31 mainly recovers syrup overflowed from the measuring barrel 32 to avoid waste (as shown in fig. 2).

When the communicating tube pneumatic valve 25 is opened, syrup slowly enters the bottom of the measuring tank 32 from the bottom of the feed tank 1 through the communicating tube 14 and overflows from the top into the overflow tank 31, and finally flows into the recovery tank 43 through the discharge tube 33.

(3) The viscometer section includes:

as shown in fig. 3, the viscometer 5 comprises a temperature probe 50, a protection frame 51, a rotor 52, a connecting rod 53, a connecting rod clamping head 54, an adjustor 55, a junction box 56, a base 57, a horizontal adjusting screw 58 and a touch screen 59, wherein the temperature probe 50 is arranged in the hollow of the connecting rod 53.

Function of the viscometer:

according to the physical characteristics of the syrup, the viscosity of the syrup is higher as the syrup brix is higher at a certain constant temperature, and the instant brix of the syrup can be calculated by measuring the syrup temperature on line according to the principle, performing A/D conversion on the viscosity by a DCS control system, performing fuzzy logic operation and performing system correction. The viscometer must be mounted on a stable and sturdy platform and held in a horizontal and vertical position. And during debugging, the height and speed of the rotor are adjusted according to the field actual condition viscometer. The rotor 52 is made into a gear shape, and the number of teeth of the rotor 52-1 (shown in figure 5) can be increased or decreased; as shown in fig. 4, the rotor 52, the connecting rod 53 and the temperature probe 50 are all detachable, and the corresponding measurement control parameters can be adjusted and queried through the touch screen.

The power supply of the viscometer is turned on, the rotor of the viscometer slowly rotates at a constant speed, the viscosity and the instant temperature of the syrup are measured by a resistance viscosity sensor generated by the syrup on the rotor, then the viscosity and the temperature signals of the syrup are transmitted to a DCS automatic control system through a communication cable, the viscosity and the temperature signals of the syrup are converted into syrup brix signals corresponding to the viscosity through fuzzy logic operation and system correction of the DCS automatic control system, and then the syrup brix signals are compared with production index parameters and then control signals are output to adjust corresponding syrup valve and steam valve opening.

(4) The cleaning part comprises a first hot water pipe 22 and a second hot water pipe 23; a first hot water pneumatic purge valve 21, a second hot water pneumatic purge valve 24; a bottom discharge pipe 26 and a bottom discharge pneumatic valve 27. The measuring barrel 32, the feeding barrel 1, the overflow barrel 31, the temperature probe 50 of the viscometer 5, the connecting rod 53 and the rotor 52 are cleaned at regular intervals according to the programming steps of the DCS automatic control system so as to ensure the stability of measurement sensitivity and precision.

The hot water cleaning function:

in addition to the cleaning function described above, the present utility model also has a sterilizing function, preventing the syrup from being easily contaminated by microorganisms generated by long-term exposure to air.

The measuring working process comprises the following steps:

the DCS automatic control system sends out an instruction: the first hot water pneumatic cleaning valve 21 and the second hot water pneumatic cleaning valve 24 are closed, and the bottom discharging pneumatic valve 27 is opened to empty sundries in the feed tank 1, the measuring tank 32 and various pipelines. The communicating tube pneumatic valve 25 is closed and the sampling valve 11 is opened, and syrup flows into the feedwell 1 through the feed tube 12. After about 90 seconds, the syrup slowly flows into the measuring barrel 32 and overflows to the overflow barrel 31 by opening the communicating pipe pneumatic valve 25, and finally flows into the recovery tank 43 through the discharge pipe 33; the viscosity meter starts to measure the viscosity of the syrup and transmits signals to the DCS automatic control system through the communication cable, and the DCS automatic control system automatically controls the opening of the syrup inlet and outlet valve and the opening of the steam valve according to the design scheme, so that the established aim is achieved.

The cleaning working process comprises the following steps:

because of the physical characteristics of syrup and the sensitive and accurate measurement required, the connecting rod 53, the rotor 52 and the temperature probe 50 are easy to adhere to condensed massecuite after a period of operation, and the measurement accuracy is affected, so that the feeding barrel 1, the measuring barrel 32, the overflow barrel 31 and the connecting rod 53, the rotor 52 and the temperature probe 50 of the viscometer 5 need to be cleaned with hot water at regular time.

The DCS automatic control system sends out an instruction: closing the sampling valve 11 and opening the bottom discharge pneumatic valve 27; after 60 seconds, the first hot water pneumatic cleaning valve 21 and the second hot water pneumatic cleaning valve 24 are opened, high-speed mist hot water is sprayed into the overflow barrel 31, the measuring barrel 32 and the feeding barrel 1, and the rotor 52, the connecting rod 53, the temperature probe 50 and the walls of each barrel of the viscometer 5 are cleaned; the sewage flows through the communicating pipe 14, the discharge pipe 33, and the bottom discharge pipe 26 to the recovery tank 43. After the cleaning is continued for 60 seconds, the first hot water pneumatic cleaning valve 21 and the second hot water pneumatic cleaning valve 24 are closed, and after 30 seconds, the bottom discharge pneumatic valve 27 is closed, so that the cleaning operation is finished. A new measurement cycle begins by opening the feed valve 11 and closing the communication tube pneumatic valve 25. The work is automatically executed by a DCS automatic control system according to the design scheme.

The utility model automatically measures the syrup brix on line, and belongs to an important part of a closed-loop control system in the evaporation concentration process.

2. The utility model relates to a control process of an on-line automatic brix measuring device

The control diagram of the on-line automatic measuring brix device of the utility model is shown in figure 6.

The DCS automatic control system sends out an instruction: closing the feed valve 11, opening the bottom discharge pneumatic valve 27 and opening the communicating pipe pneumatic valve 25; the first hot water pneumatic cleaning valve 21 and the second hot water pneumatic cleaning valve 24 are opened, high-speed mist hot water is sprayed to the overflow barrel 31, the measuring barrel 32 and the feeding barrel 1, and the temperature probe 50, the rotor 52, the connecting rod 53 and the barrel walls of the syrup brix meter 5 are cleaned. The sewage flows into the recovery tank 43 through the bottom discharge pipe 26. After the cleaning is continued for 60 seconds, the first hot water pneumatic cleaning valve 21 and the second hot water pneumatic cleaning valve 24 are closed, after 30 seconds, the bottom discharge pneumatic valve 27 is closed, and the automatic cleaning work is finished and the measuring work is ready.

The feed valve 11 is opened, the communicating tube pneumatic valve 25 is closed, and syrup flows into the feedwell 1 through the feed tube 12 and then into the recovery tank 43 through the overflow tube 13. After about 90 seconds, the syrup slowly flows into the bottom of the measuring barrel 32 and overflows to the overflow barrel 31, and finally flows into the recovery tank 43 through the discharge pipe 33 by opening the communicating pipe pneumatic valve 25; the syrup brix meter 5 starts to measure the temperature and viscosity of syrup, then transmits a measuring signal to the DCS automatic control system through a communication cable to carry out logic operation and automatically execute according to the process design requirement, and controls the opening of the syrup inlet and outlet valve and the steam valve of each effect evaporation tank to achieve the set aim.

Because of the physical characteristics of syrup and the high measurement accuracy required, the measurement accuracy is affected by the condensed massecuite attached to the measuring device after a period of operation, so that the feeding barrel, the overflow barrel, the measuring barrel and the viscometer are required to be cleaned with hot water at regular time.

The DCS automatic control system sends out an instruction: closing the feed valve 11 and opening the bottom discharge pneumatic valve 27; after 60 seconds, the first hot water pneumatic cleaning valve 21 and the second hot water pneumatic cleaning valve 24 are opened, high-speed mist hot water is sprayed into the overflow barrel 31, the measuring barrel 32 and the feeding barrel 1, and the temperature probe 50, the rotor 52, the connecting rod 53 and the barrel wall of the syrup viscometer 5 are cleaned. The sewage flows into the receiving tank through the bottom discharge pipe 26. After the cleaning is continued for 60 seconds, the first hot water pneumatic cleaning valve 21 and the second hot water pneumatic cleaning valve 24 are closed, and after 30 seconds, the automatic cleaning operation of the bottom discharge pneumatic valve 27 is finished. Opening the feed valve 11 and closing the communication tube pneumatic valve 25 as described above, a new round of measurement is repeated as the beginning. The work is automatically executed by the DCS control system according to the design scheme.

The parameters related to the method can be conveniently, intuitively and efficiently used for online friendly man-machine conversation according to the actual process requirements.

Although the present disclosure describes embodiments, the embodiments do not include a single embodiment, and the description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the embodiments in the examples may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

Claims (10)

1. The device for automatically measuring the syrup brix on line is characterized by comprising a feeding barrel, a first bracket, a working platform, a feeding pipe, a sampling valve, an overflow pipe, a communication pipeline pneumatic valve, an overflow barrel, a measuring barrel, a second bracket, a viscometer, a first hot water pipe, a second hot water pipe, a first hot water pneumatic cleaning valve, a second hot water pneumatic cleaning valve, a bottom discharge pipe, a bottom discharge pneumatic valve and a DCS automatic control system;

the feeding barrel is fixed on the working platform through a first bracket; the feeding pipe is provided with a sampling valve; the feeding pipe stretches into the feeding barrel to lean against the bottom; the feeding barrel is connected with the overflow pipe; a first hot water pneumatic cleaning valve is arranged on the first hot water pipe; the feeding barrel is connected with the measuring barrel through a pipeline and a communicating pipe pneumatic valve, and the pipeline penetrates through the bottom of the overflow barrel to enter the bottom of the measuring barrel to be connected with the measuring barrel; the overflow barrel is fixed on the working platform through a third bracket; the measuring barrel is sleeved in the overflow barrel; the bottom of the measuring barrel is not communicated with the overflow barrel; the viscometer is fixed on the working platform through a second bracket; and a measuring signal of the viscometer is connected with the DCS automatic control system through a communication cable for the junction box.

2. The on-line automatic syrup brix measuring device according to claim 1, wherein the discharge pipe is connected to the bottom of the overflow tank and extends into the recovery tank.

3. The on-line automatic syrup brix measuring device of claim 2, wherein the overflow vat is higher than the rim of the measuring vat and lower than the feed vat.

4. The on-line automatic syrup brix measuring device according to claim 3, wherein the overflow barrel and the measuring barrel are made of stainless steel pipes with different diameters and are nested together.

5. The device for automatically measuring the brix of the syrup on line according to claim 3 or 4, wherein the bottom of the measuring barrel is made into a cone shape, and a feeding hole is arranged at the bottom.

6. The on-line automatic syrup brix measuring device according to claim 1, wherein the viscometer comprises a protection frame, a rotator, a connecting rod, a temperature probe, a connecting rod clamping head, a regulator, a junction box, a base, a horizontal adjusting screw and a touch screen.

7. The device for automatically measuring the syrup brix on line according to claim 6, wherein the rotor is made into a gear shape, and the number of teeth of the rotor can be increased or decreased.

8. The device for automatically measuring the brix of the syrup on line according to claim 6, wherein the rotor, the connecting rod and the temperature probes arranged in the connecting rod are all detachable.

9. The on-line automatic syrup brix measuring device according to claim 6, wherein a temperature probe is installed in the hollow of the connecting rod.

10. The on-line automatic syrup brix measuring device according to claim 1, wherein a second hot water pneumatic purge valve is provided on the second hot water pipe; one end of the second hot water pipe is provided with a nozzle and extends into the measuring barrel; the bottom discharge pipe is provided with a bottom discharge pneumatic valve; one end of the bottom discharge pipe is connected with the communicating pipe, and the other end of the bottom discharge pipe is led into the recovery tank.