阅读说明：本技术 一种隔绝系统的在线称重流体密度计 (On-line weighing fluid densimeter of isolation system ) 是由 钟方明 于 2020-03-22 设计创作，主要内容包括：隔绝系统的全自动在线称重流体密度计能实现对流体的全自动在线取样过程控制,隔绝系统对称重的影响,倾倒清水和流体使容量瓶保持洁净,能自动完成对流体密度的测量和计算。整套装置结构简单,自动化程度高,测量精度极高,适合于工业现场中对流体密度的在线精确测量和监控应用。(The full-automatic online weighing fluid densimeter of the isolation system can realize full-automatic online sampling process control on fluid, the influence of the isolation system on weighing is realized, clear water and fluid are poured to keep the volumetric flask clean, and measurement and calculation of the fluid density can be automatically completed. The whole device has simple structure, high automation degree and high measurement precision, and is suitable for on-line accurate measurement and monitoring application of fluid density in an industrial field.)

1. The utility model provides a full-automatic online fluid densimeter of weighing of isolated system which characterized in that: the device comprises a weighing device, a volumetric flask, clean water, a measured fluid sample introduction device, a lifting device and a controller which are independently installed, wherein a weighing module for weighing is arranged above the bottom of the volumetric flask, a volumetric flask exhaust port is formed in the top of the volumetric flask, a volumetric flask funnel is arranged above the volumetric flask, a volumetric flask overflow port is formed in the wall of a bottom pipe orifice of the volumetric flask funnel, the lifting device comprises a lifter, a lifting line hole and a heavy hammer, the weighing device comprises a weighing support, a weighing module and a support hook, the weighing support is hung below the weighing module and lifts the volumetric flask, the weighing support is provided with a support hook at the bottom, the support hook is combined with the lifting line for application, the measured fluid sample introduction device of the clean water comprises clean water, a measured fluid inlet, clean water, a clean water inlet, a measured fluid inlet and a measured fluid electric three-way valve, the device comprises a measured fluid abandoned sample outlet, a lifting device, a measured fluid electric three-way valve, a clean water electric valve and a weighing module which are in signal connection with a controller, wherein the weighing module is used for weighing the weight of the volumetric flask in a state of being filled with clean water and the volumetric flask in a state of being filled with fluid and sending weight parameters to the controller; the controller calculates the density of the fluid in the volumetric flask according to the weight when the volumetric flask is fully filled with clear water and the fluid in the volumetric flask is fully filled with the fluid, and sends control signals to the clear water electric valve, the measured fluid electric three-way valve and the lifter.

2. The fully automatic on-line weighing fluid densitometer of the isolation system of claim 1, wherein: when the clean water is required to be weighed, the measured fluid flows to a measured fluid sample discarding outlet through a measured fluid electric three-way valve, a clean water electric valve is opened, the clean water flows to the clean water and the measured fluid inlet and then enters the volumetric flask, the clean water overflows from an overflow port of the volumetric flask after the volumetric flask is filled with the measured fluid, a clean water electric valve is closed, the reading of a weighing module is obtained, when the fluid is required to be weighed, the clean water electric valve is closed, the measured fluid flows to the clean water and the measured fluid inlet through the switching of the measured fluid electric three-way valve, the fluid enters the volumetric flask, the fluid overflows from the overflow port of the volumetric flask after the volumetric flask is filled with the measured fluid, the measured fluid electric three-way valve flows to a measured fluid sample discarding outlet, and the reading of the weighing module is obtained.

3. The fully automatic on-line weighing fluid densitometer of the isolation system of claim 1, wherein: after the volumetric flask is filled with clear water or fluid and weighed, the controller controls the lifting device, when the lifting wire is lifted upwards, the lifting wire hole hooks the support hook, samples in the volumetric flask are poured, and when the lifting wire returns to the original position, the lifting wire hole is completely separated from the support hook.

4. The fully automatic on-line weighing fluid densitometer of the isolation system of claim 1, wherein: the volumetric flask has a constant volume of between 0.5 and 5 liters.

Technical Field

The invention relates to a full-automatic online sampling type liquid density measuring device, in particular to a weighing device which is isolated from a system during density measurement.

Background

When the density of the slurry in the desulfurization reaction tower exceeds a limit value, a slurry replacement measure in the tower is immediately adopted to remove part of high-density slurry and supplement part of fresh desulfurization original slurry.

At present, two methods for measuring the density of slurry on line are adopted in the flue gas desulfurization process of a coal-fired boiler.

One method is as follows: the double-differential-pressure liquid level measurement mode is that two double-flange differential pressure transmitters are arranged on the side wall of the desulfurization tower body, and a pressure taking port at the upper end is at one elevation; the lower pressure taking port is below the normal liquid level of the slurry, the difference between the lower pressure taking ports of the two differential pressure transmitters is a standard interval, and the differential pressure value formed by the slurry between the standard intervals is compared with the differential pressure value formed by the standard water, so that the density value of the slurry in the tower is calculated. However, this method has the disadvantages that the liquid level in the tower is changed by the fluctuation of the smoke pressure, which affects the accurate measurement of the liquid level, and it is difficult to ensure the calculated value of the slurry density. Yet another approach is: an online density measuring instrument is arranged on an outlet pipeline of the slurry circulating pump outside the tower. Because the online densitometer has strict limitation on the flow velocity of the slurry, the flow velocity is high, the measurement precision is influenced, the flow velocity is low, and larger-particle dust particles in the slurry cannot smoothly flow through the online densitometer, so that the online densitometer is easily blocked.

The on-line weighing type densimeter is invented by the other people, but when weighing, the weighing device is connected with a valve or an electric cable of the system, the weighing weight is large, and the measuring accuracy is influenced.

Aiming at the current situation, a full-automatic online weighing fluid densimeter which is convenient to operate, accurate in metering and capable of isolating a system and dumping a sample is urgently needed.

Disclosure of Invention

In order to solve the technical defects, the invention provides the full-automatic on-line sampling and weighing fluid densimeter which has high automation degree, is isolated from the system, is accurate in measurement and is used for pouring samples.

The invention is realized by the following measures:

the invention relates to a full-automatic online weighing fluid densimeter capable of isolating a system, which comprises a weighing device, a volumetric flask, clean water, a measured fluid sample feeding device, a lifting device and a controller which are independently installed, wherein a weighing module for weighing is arranged above the volumetric flask, the top of the volumetric flask is provided with a volumetric flask exhaust port, a volumetric flask funnel is arranged above the volumetric flask, the bottom pipe orifice wall of the volumetric flask funnel is provided with a volumetric flask overflow port, the lifting device comprises a lifter, a lifting line hole and a heavy hammer, the weighing device comprises a weighing bracket, a weighing module and a bracket hook, the weighing bracket is hung below the weighing module and lifts the volumetric flask, the weighing bracket hook is arranged at the bottom of the weighing bracket and is used in combination with the lifting line, the clean water measured fluid sample feeding device comprises clean water, a measured fluid inlet and a clean water electric valve, the device comprises a clean water inlet, a measured fluid electric three-way valve and a measured fluid abandoned sample outlet, wherein the lifting device, the measured fluid electric three-way valve, a clean water electric valve and a weighing module are in signal connection with a controller, and the weighing module is used for weighing the weight of the volumetric flask in a state of being filled with clean water and the volumetric flask in a state of being filled with fluid and sending weight parameters to the controller; the controller calculates the density of the fluid in the volumetric flask according to the weight when the volumetric flask is fully filled with clear water and the fluid in the volumetric flask is fully filled with the fluid, and sends control signals to the clear water electric valve, the measured fluid electric three-way valve and the lifter.

Above-mentioned clear water is by survey fluid sampling device when needs weighing clear water, the fluid of being surveyed is switched the flow to being surveyed the fluid through being surveyed the fluid electric three-way valve and is abandoned a kind export, open clear water electric valve, clear water flows to clear water and being surveyed the fluid import, reentrant volumetric flask, clear water overflows from the volumetric flask overflow mouth after the volumetric flask is filled up, close clear water electric valve, weighing module reading, when needs weighing fluid, close clear water electric valve, the fluid of being surveyed flows to clear water and is surveyed the fluid import through being surveyed the switching of fluid electric three-way valve, fluid admission volumetric flask, the fluid overflows from the volumetric flask overflow mouth after the volumetric flask is filled up, be surveyed the fluid electric three-way valve and switch the flow to being surveyed the fluid and abandon a kind export, weighing module reading.

After the volumetric flask is filled with clear water or fluid and weighed, the controller controls the lifting device to lift the lifting wire upwards, the lifting wire hole hooks the support hook, samples in the volumetric flask are poured, and the lifting wire hole is completely separated from the support hook when returning to the original position.

The volumetric flask has a constant volume of between 0.5 and 5 liters.

The invention has the beneficial effects that: the invention can realize the full-automatic on-line sampling process control of the fluid, isolate the influence of the system on weighing, pour clean water and the fluid to keep the volumetric flask clean, and can automatically complete the measurement and calculation of the fluid density. The whole device has simple structure, high automation degree and high measurement precision, and is suitable for on-line accurate measurement and monitoring application of fluid density in an industrial field.

Drawings

Fig. 1 is a schematic view of the empty volumetric flask according to the invention.

FIG. 2 is a schematic view of the hook structure of the lifting wire and the bracket of the present invention.

In the figure: 1 controller, 2 weighing device, 21 weighing module, 22 weighing support, 23 weighing support couple, 3 clear water and measured fluid sampling device 31 clear water and measured fluid inlet, 32 clear water motorised valve, 33 clear water import, 34 measured fluid import, 35 measured fluid motorised three-way valve, 36 measured fluid abandons a kind export, 4 elevating gear, 41 lifts, 42 lifting lines, 43 weight, 44 lifting line hole, 5 volumetric flask, 51 volumetric flask funnel, 52 volumetric flask overflow mouth, 53 volumetric flask gas vent.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1, the full-automatic online weighing fluid density meter capable of isolating a system and dumping samples of the invention comprises a weighing device 2, a volumetric flask 5, a clean water and measured fluid sampling device 3, a lifting device 4 and a controller 1 which are respectively and independently installed, wherein a weighing module 21 for weighing is arranged above the bottom of the volumetric flask 5, a volumetric flask exhaust port 53 is arranged at the top of the volumetric flask 5, a volumetric flask funnel 51 is arranged above the volumetric flask 5, a volumetric flask overflow port 52 is arranged on the bottom pipe orifice wall of the volumetric flask funnel 51, the lifting device 4 comprises a lifter 41, a lifting wire 42, a lifting wire hole 44 and a heavy hammer 43, the weighing device 2 comprises a weighing bracket 22, the weighing module 21 and a bracket hook 23, the weighing bracket 22 is suspended below the weighing module 21 and lifts the volumetric flask 5, the weighing bracket 22 is provided with the bracket hook 23 at the bottom, the bracket hook 23 is used in combination with the lifting line 42, the clean water measured fluid sample introduction device 3 comprises a clean water and measured fluid inlet 31, a clean water electric valve 32, a clean water inlet 33, a measured fluid inlet 34, a measured fluid electric three-way valve 35 and a measured fluid sample discarding outlet 36, the lifter 41, the measured fluid electric three-way valve 35, the clean water electric valve 32 and the weighing module 21 are in signal connection with the controller 1, and the weighing module 21 is used for weighing the weight of the volumetric flask 5 in a state of being filled with clean water and the volumetric flask 5 in a state of being filled with fluid and sending the weight parameter to the controller 1; the controller 1 calculates the density of the fluid in the volumetric flask 5 according to the weights of the volumetric flask 5 in the state of being filled with clear water and the volumetric flask 5 in the state of being filled with the fluid, and sends control signals to the clear water electric valve 32, the measured fluid electric three-way valve 35 and the lifter 41.

Wherein the volumetric flask 5 has a volumetric volume of between 0.5 and 5 liters.

The full-automatic on-line weighing fluid density measurement steps are as follows:

the volumetric flask 5 is washed firstly, the measured fluid is switched to flow to the measured fluid sample discarding outlet 36 through the measured fluid electric three-way valve 35, the clean water electric valve 32 is turned on, the clean water flows to the clean water and the measured fluid inlet 31 and then enters the volumetric flask 5, the clean water overflows from the volumetric flask overflow port 52 after the volumetric flask 5 is filled, the clean water electric valve 32 is closed, the controller 1 controls the lifting device 4, when the lifting line 42 is lifted upwards, the lifting line hole 44 hooks the support hook 23, the sample in the volumetric flask 5 is dumped, and the lifting line 2 returns to the original position.

Clear water in the volumetric flask 5 weighs, the measured fluid flows to the measured fluid through being measured the switching of fluid electric three-way valve 35 and abandons a kind export 36, open clear water electric valve 32, clear water flows to clear water and measured fluid import 31, reentrant volumetric flask 5, clear water overflows from volumetric flask overflow mouth 52 after volumetric flask 5 is filled up, close clear water electric valve 32, weighing module 21 reading, controller 1 control elevating gear 4, lift lifting wire 42 when upwards, lifting wire hole 44 hooks support couple 23, empty the interior sample of volumetric flask 5, lifting wire 2 gets back to the normal position.

Weighing the fluid in the volumetric flask 5, closing the clear water motorised valve 32, the fluid to be measured switches to flow to clear water and the fluid import 31 to be measured through the fluid to be measured electro-dynamic three-way valve 35, the fluid gets into the volumetric flask 5, the fluid overflows from the volumetric flask overflow mouth 52 after the volumetric flask 5 is filled up, the fluid to be measured electro-dynamic three-way valve 35 switches to flow to the fluid to be measured and abandons a kind export 36, weighing module 21 reading controller 1 control elevating gear 4, when lifting line 42 upwards, lifting line hole 44 hooks support couple 23, empty the sample in the volumetric flask 5, lifting line 2 gets back to the normal position.

The above steps are not a loop.

The foregoing are only preferred embodiments of this patent, and it should be noted that those skilled in the art

It will be understood that various modifications and substitutions can be made without departing from the spirit of the patent and these are intended to be included within the scope of the appended claims.