CN113720651A - Automatic solid powder sampling and sample feeding device based on gas conveying - Google Patents
Automatic solid powder sampling and sample feeding device based on gas conveying Download PDFInfo
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- CN113720651A CN113720651A CN202110991939.9A CN202110991939A CN113720651A CN 113720651 A CN113720651 A CN 113720651A CN 202110991939 A CN202110991939 A CN 202110991939A CN 113720651 A CN113720651 A CN 113720651A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/50—Pneumatic devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/04—Detection means
- B65G2203/042—Sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1006—Dispersed solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N2021/8592—Grain or other flowing solid samples
Abstract
The invention relates to the field of laser online detection, in particular to an automatic solid powder sampling and feeding device based on gas conveying. The automatic solid powder sampling and feeding device based on gas conveying comprises a sampler, a vibrating screen, a temporary storage device, a first material level sensor, a vibrator, a butterfly valve, a material spraying tank, a high-frequency vibrator, a compressed air processing unit, a material conveying sand blasting pipe, a laser detection box, a material spraying head, a collector, a laser analysis window, a vacuum conveyor, a powder returning conveying channel, a control device, an air inlet, a material outlet, a second material level sensor, a first pressure sensor, a third material level sensor, a second pressure sensor, a first flow sensor, a second flow sensor, a third flow sensor, a fourth flow sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, a spring, a porous connecting steel pipe and a water rate detection sensor. The invention has sampling representativeness and ensures that various characteristics of the concentration, the flow rate and the like of the sprayed powder column to be detected are stable.
Description
Technical Field
The invention relates to the field of laser online detection, in particular to an automatic solid powder sampling and feeding device based on gas conveying.
Background
The traditional automatic powder sampler drives a spiral reamer by a speed reduction motor through a coupler, and realizes sampling by utilizing the transmission principle of the spiral reamer. During the sample, the material connects the material pipe from connecing the material hole entering of sampler, impels through the helical reamer, falls into as the sample in the storage vat, then takes the sample to the laboratory by the operation personnel, detects. The traditional sampling mode can not realize the on-line detection of the solid powder. The prior art has certain defects and limitations. The detection must be performed at a short distance of 1 m; the flow rate, the density and the like of the powder injection are influenced by the states of air pressure, material level and the like in the powder conveying pipeline, and the stability is poor; three single tube sampling is less representative. And fourthly, the calibration cannot be carried out by using a standard sample.
Disclosure of Invention
The invention aims to solve the problems and provides an automatic solid powder sampling and feeding device based on gas conveying.
The purpose of the invention is realized as follows: a solid powder automatic sampling and feeding device based on gas conveying comprises a sampler, a vibrating screen, a temporary storage device, a first material level sensor, a vibrator, a butterfly valve, a material spraying tank, a high-frequency vibrator, a compressed air processing unit, a material conveying sand blasting pipe, a laser detection box, a material spraying head, a collector, a laser analysis window, a vacuum conveyor, a powder return conveying channel, a control device, an air inlet, a material outlet, a second material level sensor, a first pressure sensor, a third material level sensor, a second pressure sensor, a first flow sensor, a second flow sensor, a third flow sensor, a fourth flow sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, a spring, a perforated connecting steel pipe and a water rate detection sensor, wherein the vibrating screen is arranged below the sampler, the temporary storage device is arranged below the vibrating screen, and the butterfly valve is arranged below the temporary storage device, a material spraying tank is arranged below the butterfly valve, an air inlet is arranged on one side below the material spraying tank, a discharge port is arranged on the other side, a compressed air processing unit is arranged on the other side of the air inlet, the other end of the discharge port is connected with a material spraying head through a material conveying and sand spraying pipe, a collector is arranged below the material spraying head, a vacuum conveyor is arranged below the collector, a powder returning and conveying channel is arranged at the other end of the vacuum conveyor, the material spraying head and the collector are arranged in a laser detection box, a laser analysis window is formed in one side of the laser detection box, a fourth pressure sensor is arranged at the bottom of the sampler, a third material level sensor is arranged on one side of the vibrating screen, a first material level sensor and a vibrator are arranged on one side of the temporary storage, a fifth pressure sensor and a water rate detection sensor are arranged on the other side of the temporary storage, a second material level sensor and a high-frequency vibrator are arranged on one side of the material spraying tank, and a first pressure sensor is arranged on the other side of the material spraying tank, a second pressure sensor and a first flow sensor are arranged on a connecting pipeline of the air inlet and the compressed air processing unit, a second flow sensor is arranged on a material conveying sand blasting pipe close to the discharge port, a third pressure sensor is arranged at an outlet of a material spraying head in the connecting pipe with the hole, a fourth flow sensor is arranged on a connecting pipeline between the lower part of the collector and the vacuum conveyor, and a third flow sensor is arranged on a return powder conveying channel; the sampler, the vibrating screen, the vibrator, the butterfly valve, the first material level sensor, the high-frequency vibrator, the compressed air processing unit, the second material level sensor, the first pressure sensor, the third material level sensor, the second pressure sensor, the first flow sensor, the second flow sensor, the third flow sensor, the fourth flow sensor, the third pressure sensor, the fourth pressure sensor, the fifth pressure sensor and the water rate detection sensor are all electrically connected to the control device in parallel.
Furthermore, a perforated connecting steel pipe is connected between the collector and the material spraying head.
Furthermore, the outer side of the spraying tank is provided with a fixed support, and the spraying tank is connected with the fixed support through springs arranged at four corners.
Furthermore, the compressed air enters the air inlet after passing through the compressed air processing unit.
Further, the temporary storage is a tank body with openings at the upper end and the lower end, the upper end is wide, and the lower end is narrow, and the openings at the upper end and the lower end are provided with flanges for connection.
Furthermore, the control device consists of a PLC and a control circuit.
Furthermore, a power supply circuit of the sampler, the vibrating screen, the first material level sensor, the vibrator, the butterfly valve, the high-frequency vibrator, the compressed air processing unit, the second material level sensor, the first pressure sensor, the third material level sensor, the second pressure sensor, the first flow sensor, the second flow sensor, the third flow sensor, the fourth flow sensor, the third pressure sensor, the fourth pressure sensor, the fifth pressure sensor and the water rate detection sensor is provided with a micro-current detection sensor.
The invention has the beneficial effects that: the invention adopts the sampling device of the automatic powder sampler, can realize the on-line application of the laser detection technology, and has sampling representativeness; the sampling end and the detection end can be conveyed by pressurizing the powder to realize long-distance work, and the concentration of the sprayed sample is high, so that the optical detection equipment is convenient to install; the buffer of the powder temporary storage can ensure that various characteristics such as the concentration, the flow velocity and the like of the sprayed powder column to be detected are stable.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a diagram of a control device of the present invention.
Fig. 4 is a circuit diagram of the present invention.
Fig. 5 is a gas flow diagram of the present invention.
Fig. 6 is a flow chart of the present invention.
Wherein: 1. the device comprises a sampler, a vibrating screen, a temporary storage device, a first material level sensor, a vibrator, a butterfly valve, a material spraying tank, a high-frequency vibrator, a fixing support, a compressed air processing unit, a sand conveying pipe, a sand spraying pipe, a laser detection box, a material spraying head, a collector, a laser analysis window, a vacuum conveyor, a powder return conveying channel, a control device, an air inlet, a discharge port, a second material level sensor, a first pressure sensor, a third material level sensor, a third pressure sensor, a 25 pressure sensor, a second pressure sensor, a first flow sensor, a second flow sensor, a 28 flow sensor, a fourth flow sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, a fourth pressure, 33. Spring, 34 perforated connecting steel pipe, 35 water rate detecting sensor, 36 air switch, 37 contactor, 38 thermal protection, 39 sampling reamer motor, 40.24V DC transformer, 41 thermal protection contact point, 42 working indicator lamp, 43 thermal protection indicator lamp, 44 intermediate relay-sampling motor forward rotation, 45 intermediate relay-sampling motor reverse rotation, 46 intermediate relay-vibrator action, 47 intermediate relay-butterfly valve action, 48 electromagnetic valve-butterfly valve action, 49 intermediate relay-air inlet signal, 50 intermediate relay-high frequency vibrator action, 51 intermediate relay-vibrating screen action, 52 first material level sensor action signal, 53 second material level sensor action signal, 54 third material level sensor action signal, 55. Sampling motor forward rotation signals, 56 sampling motor reverse rotation signals, 57 vibrator motors, 58 high-frequency vibrator motor action signals, 59 vibrating screen motor action signals, 60 PLC output signals, 61 intermediate relay contacts, 62 manual/automatic switching, 63 butterfly valves, material spraying manual/automatic switching, 64.24V direct current power supplies, 65 compressed air total air pressure, 66 compressed air total flow, 67 flow sensors, pressure sensors, water rate detection sensor signals, 68 alternating current transformers and micro current detection sensor signals, 69 butterfly valve action, 70 air inlet signals, 71 material level indicator lamps, 72 analog quantity input expansion modules, 73 first gas triplets, 74 second gas triplets, 75 throttle valves, 76 first two-position two-way electromagnetic valves, 77 second two-position two-way electromagnetic valves, 71 material level indicator lamps, 72 analog quantity input expansion modules, 73 first gas triplets, 74 second gas triplets, 75 throttle valves, 76 second two-position two-way electromagnetic valves, 77 second two-position two-way electromagnetic valves, and the like, 78. Two-position five-way solenoid valve, 79, first check valve, 80, second check valve.
Detailed Description
The invention solves the problems of real-time online sample taking and sending detection, sampling representativeness, limited detection working distance and the like. The industrial solid powder quantitatively obtained by the spiral reamer is conveyed to an optical detection position by utilizing compressed air, so that the representativeness of sampling is ensured, and the powder is sprayed into a gas-powder mixed sample column with higher concentration due to gas conveying so as to facilitate real-time online detection of optical equipment; the powder is conveyed by gas, under the action of stable compressed air, the sampling end and the detection end can be far away, and the distance of the powder conveying can reach 30 meters according to the pressure of the compressed air, so that the installation of flexible optical detection equipment is convenient; the powder temporary storage is added, so that the buffering effect can be achieved, and meanwhile, the automatic quantitative material taking and feeding of the material level sensor on the powder temporary storage enables the powder to be stable and continuous when entering the spraying tank, so that various characteristics such as the flow, the speed and the density of the sprayed powder column to be detected are stable; the invention can also put the standard sample in the temporary storage, through the gas transportation continuous sampling, laser detection, can use the standard sample to calibrate.
Connections between parts
The principle schematic diagram of the product of the invention is shown in the figure.
The sampler (1) is butted with the vibrating screen (2) and the temporary storage (3) by adopting a soft connecting flange; the temporary storage (3), the butterfly valve (6) and the material spraying tank (7) are connected by a flange; the compressed air processing unit (10) is connected with the air inlet (20) and the vacuum conveyor (17) by an air pipe; the discharge port (21) is connected with the spray head (14) by a sand blasting pipe; the control device (19) is electrically connected with the spiral reamer sampler (1), the vibrating screen (2), the vibrator (5), the butterfly valve (6), the high-frequency vibrator (8), the compressed air processing unit (10), the first level sensor (4), the second level sensor (22), the third level sensor (24), the first pressure sensor (23), the second pressure sensor (25), the third pressure sensor (30), the fourth pressure sensor (31), the fifth pressure sensor (32), the first flow sensor (26), the second flow sensor (27), the third flow sensor (28), the fourth flow sensor (29) and the like in parallel through cables; the material spraying head (14) and the collector (15) are connected by a connecting rigid pipe (34) with a hole on the side wall.
Function and function of each component
The spiral reamer sampler (1) is a traditional powder automatic sampler, and sampling is realized by utilizing the conveying principle of a spiral reamer. A fourth pressure sensor (31) is arranged on a pipeline connected with the vibrating screen (2); the vibrating screen (2) is a pipe connection type vibrating screen used for filtering impurities in a sample taken out by the sampler and preventing the nozzle from being blocked. A third level sensor (24) is arranged at one half of the sieve body for measuring the level.
The temporary storage (3) is a tank body with openings at the upper end and the lower end which are wide at the upper part and narrow at the lower part, and the openings at the upper end and the lower end are provided with flanges for connection, and the temporary storage is mainly used for containing samples taken out by the sampler. A material level sensor (4) is arranged at one-half of the inner wall of the temporary storage device (3) and used for detecting the material level of a sample in the temporary storage device, and when the material level reaches one-half of the temporary storage device, the material taking is stopped to prevent the sampler from sampling too much to cause material overflow or damage to the vibrating screen; a fifth pressure sensor (32) is arranged at the upper part of the temporary storage (3) for detecting the pressure in the container; a vibrator (5) is arranged on one third of the outer surface of the temporary storage device (3) away from the lower edge and used for assisting the temporary storage device in blanking, the material in the temporary storage device is ensured to be completely discharged, and the vibration frequency of the vibrator (5) is selected to be between 2500 + 3000 HZ; a water rate detection sensor (35) is arranged at one third position of the temporary storage at the bottom for detecting the moisture content of the material.
The butterfly valve (6) controls the material discharging, when the material discharging tank is opened, the sample in the temporary storage device (3) can fall into the material spraying tank (7), and when the material spraying tank is closed, a closed space can be formed in the material spraying tank to realize the pressurization conveying.
The material spraying tank (7) is also a tank body with a wide upper part and a narrow lower part, a flange is arranged at the opening at the upper end for connection, and an air inlet (20) and a material spraying port (21) are arranged at the lower end for inputting compressed air and spraying materials respectively. A high-frequency vibrator (8) is arranged at one third of the lower edge of the tank, and works simultaneously when the material spraying tank starts to spray materials, so that the fluidization effect of samples in the tank is enhanced; a second material level sensor (22) is arranged at one half of the inner wall of the tank and is used for detecting the material level of a sample in the material spraying tank; a first pressure sensor (23) is mounted on the upper part of the tank to detect the pressure in the tank.
The fixed support (9) is used for supporting and fixing the material spraying tank (7), and the material spraying tank (7) is suspended and fixed on the support through four springs (32) so as to achieve a better vibration effect. The spring is an extension spring, and the spring coefficient is usually 0.8 kg/cm.
The compressed air (11) at one end of the compressed air processing unit (10) is obtained by connecting a compressed air tank or an air compressor at an industrial site, and the processing unit comprises a gas filter, an electromagnetic valve, a proportion regulating valve and a pressure sensor which are respectively used for filtering the compressed air, controlling the on-off of the gas, regulating the output air pressure and stabilizing the pressure, and monitoring the pressure of each path of output gas. The compressed air unit is a general name of equipment for removing water, impurities and oil from compressed air from a compressed air tank or an air compressor on an industrial site, and comprises a cold dryer, a triple piece and the like. The cold dry machine mainly removes water to compressed air, and the trigeminy piece is to removing oil, removing impurity to compressed air, guarantees that the compressed air who gets into the device is dry and clean.
A second pressure sensor (25) and a first flow sensor (26) are arranged on the pipeline of the air inlet (20) and are used for respectively measuring the pressure and the flow of the air inlet; a second flow sensor (27) is arranged at the discharge port (21) to measure the flow of the sprayed gas powder; the pressure sensor and the flow sensor can be used for diagnosing and analyzing the blocking faults and also can be used for judging the faults of the butterfly valve. Through analysis of historical working experience values, when the automatic sampling and feeding device works normally, the numerical range (25) of the second pressure sensor is 0.7 +/-0.05 MPa, the numerical range of the first flow sensor (26) is 70 +/-5L/min, and the numerical range of the second flow sensor (27) is 70 +/-5L/min. When the value of the second pressure sensor (25) is sharply increased to 1.5 times of the maximum value of the normal value, and simultaneously the value of the first flow sensor (26) is sharply reduced to 50% of the minimum value of the normal value, and the value of the second flow sensor (27) is sharply reduced to 50% of the minimum value of the normal value, the situation that the material blockage fault exists at the front end of the conveying machine can be judged. Similarly, when the value of the second pressure sensor (25) and the value of the first flow sensor (26) do not change much, and the value of the second flow sensor (27) is reduced sharply to 50% of the minimum value of the normal value, the butterfly valve fault can be judged. (the butterfly valve is not closed tightly or is worn, and the phenomenon of air leakage exists).
The material conveying sand blasting pipe (12) is used for conveying gas powder from the discharge port (21) to the spraying head (14). And a second flow sensor (27) is arranged at the discharge hole to measure the flow of the powder, so that the method can be used for analyzing the reverse flow fault of the powder in the sand blasting pipe. When the values of the first flow sensor (26) and the second flow sensor (27) are reduced to the minimum value in the measuring range (because the powder flow sensor is unidirectional, when the backflow phenomenon occurs, the measured value is jumped around the minimum value allowed to be measured), and meanwhile, the value of the pressure sensor (25) is larger than 0 and has a certain pressure, the backflow phenomenon of the material conveying sand blasting pipe (12) can be judged.
The laser detection box (13) seals the material spraying head (14) and the collector (15), and the box body is provided with a laser analysis window (16) for transmitting laser and receiving required optical signals.
The material spraying head (14) is made of boron carbide and is used for converging and spraying the materials conveyed by the material spraying tank (7) in the perforated connecting steel pipe (34) to form a columnar gas-powder mixture for laser detection. A third pressure sensor (30) is installed in the connecting steel pipe and used for measuring the pressure in the steel pipe.
The collector (15) body is a high-hardness pipe and is used for collecting and sending the sample sprayed by the spray head back to the powder conveying channel; a fourth flow sensor (29) is arranged at the outlet of the collector (15) to measure the powder flow at the outlet.
The laser analysis window (16) is a piece of uncoated quartz glass and a fixed support. Other glasses can be replaced according to the needs. The opening position of the window is aligned with the opening center line of the connecting pipe of the material spraying head (14) and the collector (15).
The vacuum conveyor (17) conveys the detected gas powder to the storage bin through the powder return conveying channel (18). The powder return conveying channel (18) is provided with a third flow sensor (28) for measuring the powder return flow, and can be used for judging the reverse flow phenomenon when the powder return bin is in positive pressure.
The control device (19) is composed of a PLC and a control circuit, controls the work of each part according to the control flow, detects the signal of each sensor and collects data. The control device adopts Siemens PLC, model S7-200 SMART CPU SR 40.
Working principle and working process of the invention
When the vacuum conveyor starts to work, the air inlets, the vacuum conveyor, the electromagnetic valves and other air passages, and the butterfly valves and other air passages and valves are all closed. The spiral reamer sampler (1) presets the mode sample according to the control flow of controlling means (19), and the sample that takes gets into deposit in temporary storage device (3) after the shale shaker filters impurity, when the material level in the temporary storage device reaches the half of temporary storage device, opens butterfly valve (6) according to control flow control, starts vibrator (5) work simultaneously. When the second material level sensor (22) in the material spraying tank (7) detects that the samples all fall into the tank, the butterfly valve (6) and the vibrator (5) are closed, the high-frequency vibrator (8) is started, and the control device controls the injection of clean compressed air into the air inlet (20) and the vacuum conveyor (17) according to the control flow. After compressed air is injected into the air inlet (20), material spraying is started, a sample is sprayed out from the material spraying head (14) through the auxiliary material sand spraying pipe (12) from the material outlet (21) in a gas-powder mixed state to form a gas-powder mixed column, and the gas-powder mixed column is excited by laser passing through the laser analysis port (16), so that the components of gas powder can be detected. The sample collected by the collector (15) is returned to the powder conveying passage by a vacuum conveyor (17). When the sample in the injection tank (7) is injected, the pressure sensor (25) detects that the pressure of the input port (20) is reduced, the gas input of the input port (20) is stopped, and the high-frequency vibrator (8) and the vacuum input device (17) stop working. And finishing the detection process. Such as circulation to realize continuous on-line detection.
Analysis of fault diagnosis
The solid powder laser on-line detection automatic sampling and sending device based on gas conveying has self-diagnosis and analysis functions. All diagnosis and analysis are completed by a Siemens PLC, analysis data can be transmitted to an upper computer remotely, man-machine interaction is realized, and the influence of equipment faults and field working condition abnormity on abnormal operation of the device can be avoided in time.
The diagnosis and analysis device can accurately judge and timely position fault points including equipment faults and parameter index abnormal conditions in the operation process of the equipment.
(1) The equipment failure mainly refers to abnormal power supply of the equipment, abnormal working of a sensor or an equipment component and the like; the method comprises the following specific steps:
the failure of the helical reamer is judged by collecting a thermal protection relay signal of a reamer motor through a PLC (programmable logic controller);
the power supply abnormality diagnosis includes a micro-current detection of direct current and an alternating current detection.
The detection of the micro-current of the direct current is described as follows: a micro-current detection sensor is arranged on a power supply line of the material level sensor, when the current is zero or is lower than a set value, the power supply fault of the material level sensor can be indicated, the PLC can collect the signal and carry out emergency treatment, and the inconsistency of sampling quantity caused by the non-operation of the material level sensor is avoided; similarly, all the power supply loops of the pressure sensors and the flow sensors in the device are connected with micro-current detection sensors, analog quantity signals output by the micro-current detection sensors are collected by the PLC, and the power supply condition of a certain sensor can be accurately judged.
The ac detection is described as follows: an alternating current transformer is connected to an alternating current circuit, such as a 380V three-phase five-wire main power supply of equipment, a 380V three-phase power supply of a motor, a 220V alternating current power supply circuit of a vibration motor and the like, and is used for monitoring the power supply condition. Analog quantity signals output by the alternating current sensors are collected by the PLC, and the power supply condition of a certain power supply line can be accurately judged.
In order to ensure that equipment cannot normally operate due to power supply faults, the device is additionally provided with an Uninterrupted Power Supply (UPS) for uninterrupted emergency power supply of equipment such as a Programmable Logic Controller (PLC) control part, a micro-current detection sensor, an alternating current transformer and the like, and the diagnostic and analysis device is ensured not to stop working due to power failure of the equipment.
(2) The parameter index abnormity in the operation process of the equipment is mainly to judge and analyze the field working condition and the normal operation of the equipment according to the real-time measurement data of the sensor, and the method comprises the following specific steps:
when the blockage normally operates, the pressure of the second pressure sensor (25) of the air inlet (20) is 0.1 +/-0.05 MPa, and the flow of the first flow sensor (26) is 60 +/-5 liters per minute. When the pressure suddenly rises to 150% of the maximum value of the empirical pressure and the flow suddenly drops to 50% of the empirical value, the blockage of the material conveying sand blasting pipe (12) can be judged, the PLC can automatically analyze and judge and feed back signals to the upper computer.
The negative flow of the second flow sensor (27) at the discharge outlet connected with the reverse flow conveying sand blasting pipe (12) can indicate that the powder in the sand blasting pipe reversely flows.
The infrared sensing detection window glass of the flash in the laser bin is fuzzy, and the flash of the steel pipe (34) with the hole can be judged.
A pressure sensor of a gas path in the abnormal air supply compressed air processing unit (10) measures the pressure of the main gas path and indicates the air supply pressure of a main gas source, the pressure of the main gas path needs to be maintained at 0.7 +/-0.05 MPa according to the field test experience value, and when the pressure of the main gas source is reduced to be below 0.35MPa, a PLC stops sampling and sample sending work in time and sends out an alarm.
Signals of all the sensors are collected by the PLC, when a fault occurs, all the fault signals are diagnosed and analyzed by the PLC, a strategy scheme for solving the problem is established, a fault point is quickly and accurately positioned, corresponding measures are taken aiming at the fault, the fault is eliminated, and the safe and normal operation of the automatic sample preparation device is ensured.
The automatic sampling and sample-feeding device for the solid powder laser online detection based on gas conveying can be applied to the flow manufacturing industries of cement, glass, coal, steel, power plants and the like, automatically samples solid powder such as raw materials, clinker, fuel and the like, replaces manual sampling and manual detection, realizes real-time online automatic detection, and ensures the timeliness, stability and accuracy of detection.
According to the first scheme, a powder negative pressure sampling device and a plurality of sampling devices can be adopted to replace a spiral reamer sampler at the front end of sampling according to the actual industrial field sampling requirement, so that the sampling device is suitable for different process requirements of wider process manufacturing industry.
And in the second scheme, after sampling and shaping the sample, various types of detection devices such as microwave detection, Raman spectrum detection, infrared spectrum detection and the like can be adopted at the rear end to replace LIBS laser detection, so that the characteristics of the sample such as components, concentration and the like can be detected, and the application range is wide.
The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.
Claims (7)
1. Automatic solid powder sampling and sample feeding device based on gas conveying is characterized in that: comprises a sampler (1), a vibrating screen (2), a temporary storage device (3), a first material level sensor (4), a vibrator (5), a butterfly valve (6), a material spraying tank (7), a high-frequency vibrator (8), a compressed air processing unit (10), a material conveying and sand blasting pipe (12), a laser detection box (13), a material spraying head (14), a collector (15), a laser analysis window (16), a vacuum conveyor (17), a powder returning and conveying channel (18), a control device (19), an air inlet (20), a material outlet (21), a second material level sensor (22), a first pressure sensor (23), a third material level sensor (24), a second pressure sensor (25), a first flow sensor (26), a second flow sensor (27), a third flow sensor (28), a fourth flow sensor (29), a third pressure sensor (30), A fourth pressure sensor (31), a fifth pressure sensor (32), a spring (33), a perforated connecting steel pipe (34) and a water rate detection sensor (35), a vibrating screen (2) is arranged below the sampler (1), a temporary storage (3) is arranged below the vibrating screen (2), a butterfly valve (6) is arranged below the temporary storage (3), a material spraying tank (7) is arranged below the butterfly valve (6), an air inlet (20) is arranged on one side below the material spraying tank (7), a discharge outlet (21) is arranged on the other side, a compressed air processing unit (10) is arranged on the other side of the air inlet, the other end of the discharge outlet (21) is connected with a material spraying head (14) through a material conveying sand spraying pipe (12), a collector (15) is arranged below the material spraying head (14), a vacuum conveyor (17) is arranged below the collector (15), and a powder returning conveying channel (18) is arranged at the other end of the vacuum conveyor (17), the spray head (14) and the collector (15) are arranged in a laser detection box (13), one side of the laser detection box (13) is provided with a laser analysis window (16), the bottom of the sampler (1) is provided with a fourth pressure sensor (31), one side of the vibrating screen (2) is provided with a third material level sensor (24), one side of the temporary storage (3) is provided with a first material level sensor (4) and a vibrator (5), the other side of the temporary storage (3) is provided with a fifth pressure sensor (32) and a water rate detection sensor (35), one side of the spray tank (7) is provided with a second material level sensor (22) and a high-frequency vibrator (8), the other side of the spray tank (7) is provided with a first pressure sensor (23), and a connecting pipeline of the air inlet (20) and the compressed air processing unit (10) is provided with a second pressure sensor (25) and a first flow sensor (26), a second flow sensor (27) is arranged on the material conveying sand blasting pipe (12) close to the discharge port (21), a third pressure sensor (30) is arranged at the outlet of a material spraying head (14) in a connecting pipe (34) with a hole, a fourth flow sensor (29) is arranged on a connecting pipeline between the lower part of the collector (15) and the vacuum conveyor (17), and a third flow sensor (28) is arranged on the powder returning conveying channel (18); the sampler (1), the vibrating screen (2), the vibrator (5), the butterfly valve (6), the first material level sensor (4), the high-frequency vibrator (8), the compressed air processing unit (10), the second material level sensor (22), the first pressure sensor (23), the third material level sensor (24), the second pressure sensor (25), the first flow sensor (26), the second flow sensor (27), the third flow sensor (28), the fourth flow sensor (29), the third pressure sensor (30), the fourth pressure sensor (31), the fifth pressure sensor (32) and the water ratio detection sensor (35) are all electrically connected to the control device (19) in parallel.
2. The automatic solid powder sampling and feeding device based on gas conveying of claim 1, wherein: a perforated connecting steel pipe (34) is connected between the collector (15) and the material spraying head (14).
3. The automatic solid powder sampling and feeding device based on gas conveying of claim 1, wherein: the outer side of the material spraying tank (7) is provided with a fixed support (9), and the material spraying tank (7) is connected with the fixed support (9) through springs arranged at four corners.
4. The automatic solid powder sampling and feeding device based on gas conveying of claim 1, wherein: the compressed air (11) enters the air inlet (20) after passing through the compressed air processing unit (10).
5. The automatic solid powder sampling and feeding device based on gas conveying of claim 1, wherein: the temporary storage (3) is a tank body with openings at the upper end and the lower end, the upper end is wide, and the lower end is narrow, and the openings at the upper end and the lower end are provided with flanges for connection.
6. The automatic solid powder sampling and feeding device based on gas conveying of claim 1, wherein: the control device (19) is composed of a PLC and a control circuit.
7. The automatic solid powder sampling and feeding device based on gas conveying of claim 1, wherein: the device comprises a sampler (1), a vibrating screen (2), a first material level sensor (4), a vibrator (5), a butterfly valve (6), a high-frequency vibrator (8), a compressed air processing unit (10), a second material level sensor (22), a first pressure sensor (23), a third material level sensor (24), a second pressure sensor (25), a first flow sensor (26), a second flow sensor (27), a third flow sensor (28), a fourth flow sensor (29), a third pressure sensor (30), a fourth pressure sensor (31), a fifth pressure sensor (32) and a water rate detection sensor (35), wherein micro-current detection sensors are all installed on power supply circuits of the sampler (1), the vibrating screen (2), the first material level sensor (4), the vibrator (5), the butterfly valve (6), the high-frequency vibrator, the compressed air processing unit (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110991939.9A CN113720651A (en) | 2021-08-27 | 2021-08-27 | Automatic solid powder sampling and sample feeding device based on gas conveying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110991939.9A CN113720651A (en) | 2021-08-27 | 2021-08-27 | Automatic solid powder sampling and sample feeding device based on gas conveying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113720651A true CN113720651A (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110991939.9A Withdrawn CN113720651A (en) | 2021-08-27 | 2021-08-27 | Automatic solid powder sampling and sample feeding device based on gas conveying |
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| Country | Link |
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| CN (1) | CN113720651A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115791547A (en) * | 2023-02-09 | 2023-03-14 | 合肥金星智控科技股份有限公司 | Powder material particle size online monitoring system and method |
-
2021
- 2021-08-27 CN CN202110991939.9A patent/CN113720651A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115791547A (en) * | 2023-02-09 | 2023-03-14 | 合肥金星智控科技股份有限公司 | Powder material particle size online monitoring system and method |
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Application publication date: 20211130 |